AKI in the ICU
Principles of RRT
Modes of RRT
Indications for RRT
Optimal timing: When to start
Optimal modality: What Modality and Where ??
Optimal dosing- How Much?
Summary and Conclusions
This document discusses different types of continuous renal replacement therapy (CRRT), including CVVH, CVVHD, and CVVHDF. CRRT is indicated for critically ill patients with renal failure and hemodynamic instability or those who need continuous removal of volume or toxins. The procedures, anticoagulation methods, and order examples for each modality are provided. Standard heparin, low molecular weight heparin, and regional citrate anticoagulation are compared. CVVH uses hemofiltration, CVVHD uses hemodialysis, and CVVHDF uses a combination of hemofiltration and hemodialysis for renal replacement in critically ill patients.
This document provides an overview of renal replacement therapies used in critical care settings. It discusses some of the key questions around when and how to use these therapies for acute kidney injury (AKI) patients. While there is no definitive evidence that answers all the questions, the literature suggests starting renal replacement therapy early according to RIFLE criteria and aiming for a minimum dose of 35 ml/kg/hr. Choice of therapy mode (intermittent vs continuous) may not be as important as ensuring adequate dosing. Further research is still needed to fully understand how to optimize outcomes for AKI patients requiring renal replacement therapy.
This document discusses renal replacement therapies in critical care. It begins with several questions about what therapy to use, when to start and stop it, how much therapy is needed, and whether outcomes can be improved. It then provides an overview of AKI classification systems and discusses the relationship between AKI severity and mortality. The document reviews evidence on initiating RRT, compares intermittent therapies to continuous therapies, and discusses solute clearance methods, major RRT techniques, and managing risks like hypotension. It also explores RRT as extracorporeal blood purification therapy and hypotheses about cytokine removal.
This document discusses renal replacement therapy for acute kidney injury (AKI) in intensive care unit patients. It defines AKI and its prevalence in ICU patients. It describes the various modes of renal replacement therapy including intermittent hemodialysis, continuous renal replacement therapy and peritoneal dialysis. It discusses indications for starting renal replacement therapy and debates the optimal timing, modality and dosing of therapy. While several studies have examined these issues, the document concludes that the choice of renal replacement therapy should be individualized for each critically ill patient based on their condition and available resources.
Renal Replacement Therapy: modes and evidenceMohd Saif Khan
This document discusses various modes of renal replacement therapy (RRT) for acute kidney injury (AKI) patients, including their principles, advantages, disadvantages, and evidence regarding optimal dosing. It summarizes that while early RRT initiation and higher RRT doses were associated with better outcomes in some studies, large randomized controlled trials found no significant differences in mortality between early versus late initiation or higher versus lower RRT doses. The optimal RRT modality and timing remains unclear based on current evidence.
This document provides information on continuous renal replacement therapy (CRRT). It discusses indications for starting renal replacement therapy, including both classical renal indications like rising urea/creatinine or uraemic complications, as well as non-renal indications like fluid balance management or toxin removal. It then covers different CRRT modalities like CVVH, CVVHDF, and CVVHD. Key aspects of CRRT administration are discussed such as anticoagulation methods, replacement fluids, membranes, and troubleshooting CRRT machines and vascular access issues.
The document discusses renal replacement therapies in critical care, including various classification systems for acute kidney injury, the incidence and outcomes of AKI in ICU patients, and evidence around different renal replacement modalities. It notes that while there is no definitive evidence of superiority between therapies, higher therapy doses are associated with better outcomes. The document also explores using renal replacement therapies for blood purification beyond just solute clearance, such as for removing cytokines.
This document discusses different types of continuous renal replacement therapy (CRRT), including CVVH, CVVHD, and CVVHDF. CRRT is indicated for critically ill patients with renal failure and hemodynamic instability or those who need continuous removal of volume or toxins. The procedures, anticoagulation methods, and order examples for each modality are provided. Standard heparin, low molecular weight heparin, and regional citrate anticoagulation are compared. CVVH uses hemofiltration, CVVHD uses hemodialysis, and CVVHDF uses a combination of hemofiltration and hemodialysis for renal replacement in critically ill patients.
This document provides an overview of renal replacement therapies used in critical care settings. It discusses some of the key questions around when and how to use these therapies for acute kidney injury (AKI) patients. While there is no definitive evidence that answers all the questions, the literature suggests starting renal replacement therapy early according to RIFLE criteria and aiming for a minimum dose of 35 ml/kg/hr. Choice of therapy mode (intermittent vs continuous) may not be as important as ensuring adequate dosing. Further research is still needed to fully understand how to optimize outcomes for AKI patients requiring renal replacement therapy.
This document discusses renal replacement therapies in critical care. It begins with several questions about what therapy to use, when to start and stop it, how much therapy is needed, and whether outcomes can be improved. It then provides an overview of AKI classification systems and discusses the relationship between AKI severity and mortality. The document reviews evidence on initiating RRT, compares intermittent therapies to continuous therapies, and discusses solute clearance methods, major RRT techniques, and managing risks like hypotension. It also explores RRT as extracorporeal blood purification therapy and hypotheses about cytokine removal.
This document discusses renal replacement therapy for acute kidney injury (AKI) in intensive care unit patients. It defines AKI and its prevalence in ICU patients. It describes the various modes of renal replacement therapy including intermittent hemodialysis, continuous renal replacement therapy and peritoneal dialysis. It discusses indications for starting renal replacement therapy and debates the optimal timing, modality and dosing of therapy. While several studies have examined these issues, the document concludes that the choice of renal replacement therapy should be individualized for each critically ill patient based on their condition and available resources.
Renal Replacement Therapy: modes and evidenceMohd Saif Khan
This document discusses various modes of renal replacement therapy (RRT) for acute kidney injury (AKI) patients, including their principles, advantages, disadvantages, and evidence regarding optimal dosing. It summarizes that while early RRT initiation and higher RRT doses were associated with better outcomes in some studies, large randomized controlled trials found no significant differences in mortality between early versus late initiation or higher versus lower RRT doses. The optimal RRT modality and timing remains unclear based on current evidence.
This document provides information on continuous renal replacement therapy (CRRT). It discusses indications for starting renal replacement therapy, including both classical renal indications like rising urea/creatinine or uraemic complications, as well as non-renal indications like fluid balance management or toxin removal. It then covers different CRRT modalities like CVVH, CVVHDF, and CVVHD. Key aspects of CRRT administration are discussed such as anticoagulation methods, replacement fluids, membranes, and troubleshooting CRRT machines and vascular access issues.
The document discusses renal replacement therapies in critical care, including various classification systems for acute kidney injury, the incidence and outcomes of AKI in ICU patients, and evidence around different renal replacement modalities. It notes that while there is no definitive evidence of superiority between therapies, higher therapy doses are associated with better outcomes. The document also explores using renal replacement therapies for blood purification beyond just solute clearance, such as for removing cytokines.
- Renal replacement therapies are important in critical care for managing complications of renal failure such as fluid, electrolyte and acid-base imbalances. There are many questions around optimal therapy including timing, dose and modality.
- Acute kidney injury is common in the ICU and associated with worse outcomes. Continuous renal replacement therapies may provide more stable volume and chemistry control compared to intermittent therapies.
- High volume hemofiltration shows promise for removing inflammatory mediators in sepsis but optimal dose is still unclear. Renal replacement therapies have an important role beyond renal support as blood purification techniques.
Continuous renal replacement therapy in the adult intensive care unitIPMS- KMU KPK PAKISTAN
1. Continuous renal replacement therapy (CRRT) has become the standard treatment for acute renal failure in critically ill patients due to concerns about hemodynamic stability during intermittent hemodialysis.
2. There are several types of CRRT including continuous venovenous hemofiltration (CVVH), continuous venovenous hemodialysis (CVVHD), and continuous venovenous hemodiafiltration (CVVHDF).
3. CRRT works continuously over days to slowly remove fluid and waste from the blood, mimicking the native kidney function and allowing for greater hemodynamic stability compared to intermittent hemodialysis.
CRRT and AKI
- Continuous renal replacement therapy (CRRT) is a treatment for acute kidney injury (AKI) that can remove fluid and waste products from patients who are hemodynamically unstable.
- CRRT was developed in the 1970s-1980s and uses an extracorporeal blood pump and catheter to continuously filter blood outside the body.
- The choice of CRRT or intermittent dialysis depends on the patient's condition and stability, with CRRT often preferred for unstable patients with fluid overload or brain injury.
- Proper nursing management before, during, and after CRRT is crucial and includes assessments, monitoring, preventing mechanical issues, and managing antico
Rrt in icu dr said khamis zagazig april 2018 latestFarragBahbah
The document provides an overview of renal replacement therapy (RRT) modalities for critically ill patients with acute kidney injury (AKI). It discusses the history and evolution of RRT, including intermittent hemodialysis (IHD) and continuous renal replacement therapy (CRRT). The pros and cons of IHD and CRRT are presented. Key considerations for RRT include which modality to use, anticoagulation options, dialysate buffers, and membranes. Guidelines for determining therapy dose and duration and criteria for discontinuing RRT are summarized. Outcomes with IHD versus CRRT remain unclear due to limitations of existing studies. Overall, the document reviews best practices for delivering RRT to critically ill AK
The document outlines the objectives and key concepts of a training course on continuous renal replacement therapy (CRRT). It defines CRRT and discusses the basic principles of CRRT, including solute transport mechanisms, clinical indications, machine setup and safety features, and fluid balance principles. It also summarizes evidenced-based research showing improved patient survival with early CRRT initiation and adequate dose delivery.
This document discusses continuous renal replacement therapy (CRRT) for acute kidney injury (AKI). It begins by defining CRRT and describing its indications, including life-threatening conditions like hyperkalemia and pulmonary edema. It recommends starting CRRT early in AKI and discusses modalities like CVVH, CVVHD, and CVVHDF. The document provides details on how to perform CRRT, such as catheter placement and settings. It also addresses complications and suggests using bicarbonate-based fluids and biocompatible membranes. In summary, the document provides a comprehensive overview of CRRT for AKI, including indications, modalities, procedures, and recommendations to optimize outcomes.
Continuous rrt and its role in critically ill patients [autosaved]Harsh shaH
The document discusses renal replacement therapy (RRT) for acute kidney injury (AKI) in critically ill patients. It describes that early initiation of RRT may improve outcomes compared to late initiation. Continuous RRT is preferred for hemodynamically unstable patients as it allows for slower fluid and solute removal. The optimal RRT approach depends on the individual patient's clinical status and needs.
This document discusses continuous renal replacement therapy (CRRT). It begins by defining CRRT as any extracorporeal blood purification therapy intended to substitute for impaired renal function over an extended period of 24 hours per day. The document then discusses the reasons for CRRT, including removal of waste products, fluid, regulation of electrolytes and acid-base balance, prevention of further kidney damage, and hemodynamic stability. It provides examples of how CRRT can help in conditions like acute renal failure, congestive heart failure, sepsis, rhabdomyolysis, and intoxications by closely mimicking the functions of the native kidney over a continuous period of time.
This document provides an introduction, history, and indications for continuous renal replacement therapy (CRRT). It summarizes that CRRT was developed as an alternative to intermittent hemodialysis for critically ill patients. CRRT allows for slow, continuous removal of waste and fluid over many hours compared to brief, intermittent hemodialysis sessions. The document reviews the components of CRRT systems and indications for its use in critically ill patients with conditions like fluid overload, acidosis, hyperkalemia, or multi-organ dysfunction.
This document discusses various aspects of renal replacement therapy for acute kidney injury. It begins by outlining the stage-based management of AKI, with increasing intervention and monitoring recommended as the stage progresses from risk to injury to failure. The document then addresses indications for starting renal replacement therapy, appropriate modalities including intermittent hemodialysis, slow continuous ultrafiltration, and continuous renal replacement therapy. Key factors like vascular access, solutions, membranes, anticoagulation, and dose are discussed. The overall conclusions are that while data from high-quality randomized controlled trials are still lacking, earlier initiation of renal replacement therapy may aid recovery, and continuous modalities are generally preferred over intermittent hemodialysis for unstable patients. Individualization of
Continuous renal replacement therapy in icu Crrt 2samirelansary
This document discusses continuous renal replacement therapy (CRRT). It begins by defining CRRT and its purpose of substituting impaired renal function over an extended period of 24 hours per day. It then discusses the requirements, indications, principles, and modalities of CRRT. The principles section covers vascular access, semi-permeable membranes, transport mechanisms, and dialysate/replacement fluids. The modalities section explains slow continuous ultrafiltration, continuous venovenous hemofiltration, hemodialysis, and hemodiafiltration. The document also addresses dosing of CRRT, anticoagulation, and complications.
This document discusses the pros and cons of different modalities of continuous renal replacement therapy (CRRT) for acute kidney injury (AKI). It outlines various CRRT machines and modalities like CVVH, CVVHDF, and how they differ in mechanisms of diffusion, convection, and clearance rates. The modalities are compared to intermittent hemodialysis (IHD) and factors like hemodynamic stability, efficiency, and logistics are evaluated. Quality indicators for CRRT delivery and recent literature on optimizing multidisciplinary CRRT teams to potentially improve outcomes in AKI patients are also summarized.
Renal replacement therapy prof. ahmed rabeeFarragBahbah
The document discusses renal replacement therapy (RRT) and indications for dialysis. It provides definitions of dialysis and notes it is used for acute kidney injury (AKI) and end-stage renal disease (CKD stage 5). For AKI, the main indications for dialysis are electrolyte abnormalities, fluid overload, and uremia complications. Hemodialysis, peritoneal dialysis and hemofiltration are the primary RRT modalities for AKI. For CKD, indications include refractory fluid overload, metabolic abnormalities, and symptoms like nausea/vomiting or malnutrition. The decision to start dialysis involves clinical status and quality of life considerations.
CRRT describes a group of renal replacement therapies that provide continuous renal replacement over an extended period of time, typically 24 hours per day. There are several CRRT modalities including CVVH, CVVHD, and CVVHDF that utilize different molecular transport mechanisms like diffusion, convection, and ultrafiltration. CRRT is commonly used to treat acute kidney injury as it closely mimics the native kidney and is better tolerated by hemodynamically unstable patients. Studies have shown that earlier initiation of CRRT and achieving an adequate dose of effluent flow rate or solute clearance may improve survival rates in patients with acute renal failure.
Stage-based management of acute kidney injury (AKI) involves monitoring for progression from risk to injury to failure. For stage 1 (risk), monitoring to prevent progression is recommended. For stage 2 (injury), conservative therapy is recommended due to high risk of mortality/morbidity. For stage 3 (failure), renal replacement therapy (RRT) should be considered due to highest risk of death. Continuous renal replacement therapy (CRRT) is preferred for hemodynamically unstable patients and allows for slow correction while maintaining hemodynamic stability. Higher CRRT doses of 35 ml/kg/hr may improve survival compared to lower doses, though optimal dosing remains controversial.
Continuous renal replacement therapy (CRRT) involves using extracorporeal blood purification therapies to slowly remove waste and fluid from patients with impaired kidney function over an extended period of time, typically 24 hours per day. CRRT aims to closely mimic the native kidney and is well-tolerated by hemodynamically unstable patients. It allows for gentle removal of large amounts of fluid and waste products while also controlling electrolytes, acid-base balance, and removal of sepsis mediators. CRRT has advantages over intermittent dialysis in managing fluid overload and maintaining hemodynamic stability.
This document discusses sustained low-efficiency daily dialysis (SLEDD) for treating acute kidney injury (AKI) in critically ill patients. SLEDD is a hybrid therapy that combines aspects of continuous renal replacement therapy and intermittent hemodialysis. It allows for a reduced ultrafiltration rate and prolonged treatment duration to maximize dialysis dose while maintaining hemodynamic stability. The document outlines the indications for SLEDD, including patients at risk of disequilibrium or with borderline cardiovascular stability. Preliminary studies suggest SLEDD is a safe and effective option for AKI patients otherwise unsuitable for standard therapies.
This document discusses renal replacement therapy (RRT) including the stages of kidney disease, types of dialysis, and access methods. It covers the primary functions of the kidney and consequences of kidney failure. The two main types of RRT are peritoneal dialysis and hemodialysis. Peritoneal dialysis uses the peritoneal membrane as a filter through a catheter, while hemodialysis uses an artificial kidney external to the body with vascular access.
Dr. Kumar presented on renal replacement therapy. The key points are:
1. Approximately 5% of critically ill patients with AKI will require RRT, with a mortality rate as high as 60%.
2. RRT options include intermittent HD, continuous therapies like CVVH/CVVHD/CVVHDF, and SLED.
3. The choice of RRT depends on the patient's cardiovascular status, resources available, and whether fluid removal or solute clearance is required. CRRT is preferred for hemodynamically unstable patients.
This document discusses renal replacement therapies for acute kidney injury in critical care. It begins by outlining some open questions about optimal therapy use. It then reviews classification systems for AKI severity and evidence that increased severity is associated with higher mortality. The document discusses evidence for relationships between higher therapy dose and better outcomes for intermittent hemodialysis and continuous venovenous hemofiltration. While no definitive evidence establishes the superiority of any one therapy, higher therapy doses are generally associated with better patient outcomes. The document outlines various renal replacement therapy options and their pros and cons.
A very simple yet comprehensive presentation to understand the concept of CRRT and its implementation in Intensive Care Unit. Intended for the very beginners in ICU. After going through the presentation you will be able to say "Now I know it!"
- Renal replacement therapies are important in critical care for managing complications of renal failure such as fluid, electrolyte and acid-base imbalances. There are many questions around optimal therapy including timing, dose and modality.
- Acute kidney injury is common in the ICU and associated with worse outcomes. Continuous renal replacement therapies may provide more stable volume and chemistry control compared to intermittent therapies.
- High volume hemofiltration shows promise for removing inflammatory mediators in sepsis but optimal dose is still unclear. Renal replacement therapies have an important role beyond renal support as blood purification techniques.
Continuous renal replacement therapy in the adult intensive care unitIPMS- KMU KPK PAKISTAN
1. Continuous renal replacement therapy (CRRT) has become the standard treatment for acute renal failure in critically ill patients due to concerns about hemodynamic stability during intermittent hemodialysis.
2. There are several types of CRRT including continuous venovenous hemofiltration (CVVH), continuous venovenous hemodialysis (CVVHD), and continuous venovenous hemodiafiltration (CVVHDF).
3. CRRT works continuously over days to slowly remove fluid and waste from the blood, mimicking the native kidney function and allowing for greater hemodynamic stability compared to intermittent hemodialysis.
CRRT and AKI
- Continuous renal replacement therapy (CRRT) is a treatment for acute kidney injury (AKI) that can remove fluid and waste products from patients who are hemodynamically unstable.
- CRRT was developed in the 1970s-1980s and uses an extracorporeal blood pump and catheter to continuously filter blood outside the body.
- The choice of CRRT or intermittent dialysis depends on the patient's condition and stability, with CRRT often preferred for unstable patients with fluid overload or brain injury.
- Proper nursing management before, during, and after CRRT is crucial and includes assessments, monitoring, preventing mechanical issues, and managing antico
Rrt in icu dr said khamis zagazig april 2018 latestFarragBahbah
The document provides an overview of renal replacement therapy (RRT) modalities for critically ill patients with acute kidney injury (AKI). It discusses the history and evolution of RRT, including intermittent hemodialysis (IHD) and continuous renal replacement therapy (CRRT). The pros and cons of IHD and CRRT are presented. Key considerations for RRT include which modality to use, anticoagulation options, dialysate buffers, and membranes. Guidelines for determining therapy dose and duration and criteria for discontinuing RRT are summarized. Outcomes with IHD versus CRRT remain unclear due to limitations of existing studies. Overall, the document reviews best practices for delivering RRT to critically ill AK
The document outlines the objectives and key concepts of a training course on continuous renal replacement therapy (CRRT). It defines CRRT and discusses the basic principles of CRRT, including solute transport mechanisms, clinical indications, machine setup and safety features, and fluid balance principles. It also summarizes evidenced-based research showing improved patient survival with early CRRT initiation and adequate dose delivery.
This document discusses continuous renal replacement therapy (CRRT) for acute kidney injury (AKI). It begins by defining CRRT and describing its indications, including life-threatening conditions like hyperkalemia and pulmonary edema. It recommends starting CRRT early in AKI and discusses modalities like CVVH, CVVHD, and CVVHDF. The document provides details on how to perform CRRT, such as catheter placement and settings. It also addresses complications and suggests using bicarbonate-based fluids and biocompatible membranes. In summary, the document provides a comprehensive overview of CRRT for AKI, including indications, modalities, procedures, and recommendations to optimize outcomes.
Continuous rrt and its role in critically ill patients [autosaved]Harsh shaH
The document discusses renal replacement therapy (RRT) for acute kidney injury (AKI) in critically ill patients. It describes that early initiation of RRT may improve outcomes compared to late initiation. Continuous RRT is preferred for hemodynamically unstable patients as it allows for slower fluid and solute removal. The optimal RRT approach depends on the individual patient's clinical status and needs.
This document discusses continuous renal replacement therapy (CRRT). It begins by defining CRRT as any extracorporeal blood purification therapy intended to substitute for impaired renal function over an extended period of 24 hours per day. The document then discusses the reasons for CRRT, including removal of waste products, fluid, regulation of electrolytes and acid-base balance, prevention of further kidney damage, and hemodynamic stability. It provides examples of how CRRT can help in conditions like acute renal failure, congestive heart failure, sepsis, rhabdomyolysis, and intoxications by closely mimicking the functions of the native kidney over a continuous period of time.
This document provides an introduction, history, and indications for continuous renal replacement therapy (CRRT). It summarizes that CRRT was developed as an alternative to intermittent hemodialysis for critically ill patients. CRRT allows for slow, continuous removal of waste and fluid over many hours compared to brief, intermittent hemodialysis sessions. The document reviews the components of CRRT systems and indications for its use in critically ill patients with conditions like fluid overload, acidosis, hyperkalemia, or multi-organ dysfunction.
This document discusses various aspects of renal replacement therapy for acute kidney injury. It begins by outlining the stage-based management of AKI, with increasing intervention and monitoring recommended as the stage progresses from risk to injury to failure. The document then addresses indications for starting renal replacement therapy, appropriate modalities including intermittent hemodialysis, slow continuous ultrafiltration, and continuous renal replacement therapy. Key factors like vascular access, solutions, membranes, anticoagulation, and dose are discussed. The overall conclusions are that while data from high-quality randomized controlled trials are still lacking, earlier initiation of renal replacement therapy may aid recovery, and continuous modalities are generally preferred over intermittent hemodialysis for unstable patients. Individualization of
Continuous renal replacement therapy in icu Crrt 2samirelansary
This document discusses continuous renal replacement therapy (CRRT). It begins by defining CRRT and its purpose of substituting impaired renal function over an extended period of 24 hours per day. It then discusses the requirements, indications, principles, and modalities of CRRT. The principles section covers vascular access, semi-permeable membranes, transport mechanisms, and dialysate/replacement fluids. The modalities section explains slow continuous ultrafiltration, continuous venovenous hemofiltration, hemodialysis, and hemodiafiltration. The document also addresses dosing of CRRT, anticoagulation, and complications.
This document discusses the pros and cons of different modalities of continuous renal replacement therapy (CRRT) for acute kidney injury (AKI). It outlines various CRRT machines and modalities like CVVH, CVVHDF, and how they differ in mechanisms of diffusion, convection, and clearance rates. The modalities are compared to intermittent hemodialysis (IHD) and factors like hemodynamic stability, efficiency, and logistics are evaluated. Quality indicators for CRRT delivery and recent literature on optimizing multidisciplinary CRRT teams to potentially improve outcomes in AKI patients are also summarized.
Renal replacement therapy prof. ahmed rabeeFarragBahbah
The document discusses renal replacement therapy (RRT) and indications for dialysis. It provides definitions of dialysis and notes it is used for acute kidney injury (AKI) and end-stage renal disease (CKD stage 5). For AKI, the main indications for dialysis are electrolyte abnormalities, fluid overload, and uremia complications. Hemodialysis, peritoneal dialysis and hemofiltration are the primary RRT modalities for AKI. For CKD, indications include refractory fluid overload, metabolic abnormalities, and symptoms like nausea/vomiting or malnutrition. The decision to start dialysis involves clinical status and quality of life considerations.
CRRT describes a group of renal replacement therapies that provide continuous renal replacement over an extended period of time, typically 24 hours per day. There are several CRRT modalities including CVVH, CVVHD, and CVVHDF that utilize different molecular transport mechanisms like diffusion, convection, and ultrafiltration. CRRT is commonly used to treat acute kidney injury as it closely mimics the native kidney and is better tolerated by hemodynamically unstable patients. Studies have shown that earlier initiation of CRRT and achieving an adequate dose of effluent flow rate or solute clearance may improve survival rates in patients with acute renal failure.
Stage-based management of acute kidney injury (AKI) involves monitoring for progression from risk to injury to failure. For stage 1 (risk), monitoring to prevent progression is recommended. For stage 2 (injury), conservative therapy is recommended due to high risk of mortality/morbidity. For stage 3 (failure), renal replacement therapy (RRT) should be considered due to highest risk of death. Continuous renal replacement therapy (CRRT) is preferred for hemodynamically unstable patients and allows for slow correction while maintaining hemodynamic stability. Higher CRRT doses of 35 ml/kg/hr may improve survival compared to lower doses, though optimal dosing remains controversial.
Continuous renal replacement therapy (CRRT) involves using extracorporeal blood purification therapies to slowly remove waste and fluid from patients with impaired kidney function over an extended period of time, typically 24 hours per day. CRRT aims to closely mimic the native kidney and is well-tolerated by hemodynamically unstable patients. It allows for gentle removal of large amounts of fluid and waste products while also controlling electrolytes, acid-base balance, and removal of sepsis mediators. CRRT has advantages over intermittent dialysis in managing fluid overload and maintaining hemodynamic stability.
This document discusses sustained low-efficiency daily dialysis (SLEDD) for treating acute kidney injury (AKI) in critically ill patients. SLEDD is a hybrid therapy that combines aspects of continuous renal replacement therapy and intermittent hemodialysis. It allows for a reduced ultrafiltration rate and prolonged treatment duration to maximize dialysis dose while maintaining hemodynamic stability. The document outlines the indications for SLEDD, including patients at risk of disequilibrium or with borderline cardiovascular stability. Preliminary studies suggest SLEDD is a safe and effective option for AKI patients otherwise unsuitable for standard therapies.
This document discusses renal replacement therapy (RRT) including the stages of kidney disease, types of dialysis, and access methods. It covers the primary functions of the kidney and consequences of kidney failure. The two main types of RRT are peritoneal dialysis and hemodialysis. Peritoneal dialysis uses the peritoneal membrane as a filter through a catheter, while hemodialysis uses an artificial kidney external to the body with vascular access.
Dr. Kumar presented on renal replacement therapy. The key points are:
1. Approximately 5% of critically ill patients with AKI will require RRT, with a mortality rate as high as 60%.
2. RRT options include intermittent HD, continuous therapies like CVVH/CVVHD/CVVHDF, and SLED.
3. The choice of RRT depends on the patient's cardiovascular status, resources available, and whether fluid removal or solute clearance is required. CRRT is preferred for hemodynamically unstable patients.
This document discusses renal replacement therapies for acute kidney injury in critical care. It begins by outlining some open questions about optimal therapy use. It then reviews classification systems for AKI severity and evidence that increased severity is associated with higher mortality. The document discusses evidence for relationships between higher therapy dose and better outcomes for intermittent hemodialysis and continuous venovenous hemofiltration. While no definitive evidence establishes the superiority of any one therapy, higher therapy doses are generally associated with better patient outcomes. The document outlines various renal replacement therapy options and their pros and cons.
A very simple yet comprehensive presentation to understand the concept of CRRT and its implementation in Intensive Care Unit. Intended for the very beginners in ICU. After going through the presentation you will be able to say "Now I know it!"
This document discusses the role of the laboratory in renal replacement therapy. It begins by outlining the normal functions of the kidneys and describing acute kidney injury (AKI), chronic kidney disease (CKD), and the various forms of renal replacement therapy including dialysis and transplantation. It then discusses guidelines for assessing and treating AKI and CKD patients undergoing renal replacement therapy. The document also covers the laboratory's role in monitoring transplant patients and various immunosuppressive drugs. It concludes by discussing new markers being used to monitor renal replacement therapy and important considerations for long-term therapy.
continous versus intermittent RRT in the ICU Salwa Ibrahim
This document discusses different modalities of continuous renal replacement therapy (CRRT) for critically ill patients with acute kidney injury, including CVVH, CVVHDF and CVVHD. It summarizes evidence from randomized controlled trials and systematic reviews showing no significant differences in mortality or renal recovery rates between CRRT and intermittent hemodialysis. Slow low efficiency daily dialysis (SLED) is presented as a hybrid therapy that combines benefits of CRRT and economics of intermittent hemodialysis. A cost analysis shows CRRT is more expensive than SLED due to additional consumables and fluids required. The conclusion is that while CRRT may provide higher blood pressure, there is no evidence it improves survival over intermittent
This document discusses guidelines for hemodialysis prescription. It provides details on various aspects of the dialysis prescription including modality, frequency, duration, dose, dialysate composition and temperature. It emphasizes the importance of achieving adequate dialysis as defined by fluid removal, normalized electrolytes and minerals, adequate dialysis dose and absence of symptoms. The criteria for optimal dialysis are more stringent and include normalization of blood pressure and minerals without medications, absence of symptoms during and between treatments, no interference with daily life and near-normal life expectancy.
Three sentences:
The document summarizes evidence from studies comparing normal saline to balanced crystalloid solutions like Ringer's lactate for intravenous fluid therapy. Large randomized controlled trials found balanced crystalloids were associated with fewer kidney complications compared to normal saline, especially in critically ill patients. More recent studies found no significant differences in outcomes between fluid types when administered at different rates, suggesting volume may be a more important factor than specific fluid used.
This document discusses the role of continuous renal replacement therapy (CRRT) in liver transplantation. It provides details on how to prescribe CRRT, including blood flow, dose, mode, substitution fluid, dialysate flow, fluid removal, fluid addition, and anticoagulation. It compares CRRT to intermittent hemodialysis. It then presents a case scenario of a patient undergoing liver transplantation who develops hepatorenal syndrome and requires CRRT intraoperatively and postoperatively based on their condition of massive blood loss, hypotension, and anuria. The CRRT prescription and monitoring of the patient over one week is described, showing recovering kidney function.
Renal replacement therapies like dialysis and continuous renal replacement therapies are used to replace kidney function in patients with kidney failure. Dialysis involves diffusion of toxins out of the bloodstream across a semipermeable membrane. The main types of dialysis are hemodialysis, which uses an external dialysis machine, and peritoneal dialysis, which uses the patient's peritoneum. Hemodialysis requires vascular access via an arteriovenous fistula or graft and occurs several times per week. Peritoneal dialysis involves infusing dialysate into the peritoneal cavity daily to remove waste through the peritoneum. Continuous renal replacement therapies continuously filter blood using convection and diffusion.
Chlorthalidone for poorly controlled hypertension in chronic kidney diseasesShadab Ahmad
Given the central role of volume excess in the pathogenesis of hypertension in CKD, and the low cost of thiazide diuretics, there is a need to study the use of these drugs to lower BP among patients with uncontrolled hypertension and moderately advanced CKD.
This document discusses various modalities of renal replacement therapy in children including peritoneal dialysis, hemodialysis, and continuous renal replacement therapy. It provides details on the principles, procedures, indications, and complications of each modality. The key points are:
- Renal replacement therapy helps clear accumulated solutes, water, or toxins from the blood via diffusion or convection across a semipermeable membrane.
- Peritoneal dialysis can be performed manually or with a machine and involves exchanging dialysate fluid into the peritoneal cavity. Hemodialysis uses an artificial kidney to filter blood outside the body. Continuous renal replacement therapy provides prolonged dialysis without interruption that is better tolerated in critically ill
This document discusses various types of intravenous fluids used in medication and fluid therapy. It describes crystalloid fluids like normal saline and Ringer's lactate, which contain electrolytes and provide intravascular volume expansion. It also discusses dextrose solutions like 5% dextrose and Dextrose saline, which provide calories in addition to fluid. The document outlines the composition, pharmacological effects, indications, and contraindications of these intravenous fluids.
This document summarizes key aspects of fluid management in peritoneal dialysis (PD) patients. It discusses optimizing PD prescriptions to balance adequate solute clearance while avoiding excess dialysis fluid exposure. Factors like residual renal function, membrane characteristics, fill volume and dwell time are considered. Monitoring adequacy includes measuring clearances and adjusting therapy if targets are not met. Guidelines recommend strategies to preserve renal function like ACEi/ARB use and avoiding dehydration.
Renal replacement therapy (RRT) refers to life-supporting treatments for renal failure and includes hemodialysis, peritoneal dialysis, and continuous renal replacement therapy. The choice of RRT depends on factors like the patient's cardiovascular status, availability of resources, and clinical considerations. Common complications include those related to vascular access and electrolyte imbalances. RRT aims to correct fluid overload, metabolic abnormalities, and remove waste through diffusion or convection.
Urea kinetics and Hemodialysis Adequacy
- Urea kinetics modeling uses urea levels to estimate dialysis adequacy through the Kt/V measurement. The National Cooperative Dialysis Study in the 1970s showed that higher Kt/V (above 0.8) correlated with lower morbidity. Current guidelines target a Kt/V of at least 1.2 to ensure an delivered amount of at least 1.0. The HEMO study found no additional benefit to survival or hospitalization for Kt/V above 1.4.
This document discusses prescribing acute and chronic peritoneal dialysis. For acute PD, it recommends using a Tenckhoff catheter and automated cyclers. Exchanges should be hourly with 2L volumes. Clearance is monitored using BUN levels and D:P ratios. Complications include abdominal distention and peritonitis. For chronic PD, clearance targets are a Kt/V of 1.7 per week. Prescriptions are based on residual renal function, transporter status, and body size. CAPD and APD are both options depending on lifestyle. Clearance can be increased by optimizing exchange volumes, frequency, and solution tonicity.
Renal replacement therapy encompasses life-supporting treatments for renal failure such as hemodialysis, peritoneal dialysis, and continuous renal replacement therapy. Hemodialysis uses diffusion and filtration across a semi-permeable membrane to remove waste and fluid. Peritoneal dialysis infuses dialysate into the peritoneal cavity. Continuous renal replacement therapy provides 24-hour treatment through diffusion, convection, or a combination. These therapies aim to replace normal kidney functions of waste removal and fluid balance.
The document discusses continuous renal replacement therapy (CRRT), including its indications, prescription, adverse effects, and comparison to intermittent hemodialysis. CRRT is indicated for hemodynamically unstable patients with acute kidney injury and is used to slowly clear waste and correct fluid/electrolyte imbalances. The prescription details parameters like blood and dialysate flow rates, fluid removal/addition amounts, and anticoagulation. Adverse effects include electrolyte disturbances and bleeding risks. CRRT is more portable and suitable for urgent cases than intermittent hemodialysis.
1) Acute kidney injury commonly occurs in critical illness and is a predictor of adverse outcomes. Common causes include renal hypoperfusion, SIRS, nephrotoxic drugs, and contrast nephropathy.
2) Early volume expansion is recommended to correct extracellular volume depletion, though certain colloids may impair renal function. Diuretics do not improve outcomes and increase side effects.
3) Maintaining an MAP of at least 60-65mmHg with vasopressors is recommended, and vasodilators like fenoldopam may benefit renal function. Tight glycemic control may reduce acute kidney injury in surgical ICU patients.
This document discusses evaluating the adequacy of hemodialysis treatment. It states that numerous studies have shown a correlation between the delivered dose of hemodialysis and patient mortality and morbidity. The urea reduction ratio (URR), which measures the percentage reduction of urea levels pre- and post-dialysis, is one way to evaluate adequacy, with a URR over 60% generally associated with better outcomes. Equilibrated Kt/V is also discussed as a standard measure of dialysis dose, with a minimum of 1.4 recommended. The document outlines factors that influence adequacy, including treatment time and frequency, dialyzer characteristics, blood and dialysate flow rates, and dialysis solution composition
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Healthy Eating Habits:
Understanding Nutrition Labels: Teaches how to read and interpret food labels, focusing on serving sizes, calorie intake, and nutrients to limit or include.
Tips for Healthy Eating: Offers practical advice such as incorporating a variety of foods, practicing moderation, staying hydrated, and eating mindfully.
Benefits of Regular Exercise:
Physical Benefits: Discusses how exercise aids in weight management, muscle and bone health, cardiovascular health, and flexibility.
Mental Benefits: Explains the psychological advantages, including stress reduction, improved mood, and better sleep.
Tips for Staying Active:
Encourages consistency, variety in exercises, setting realistic goals, and finding enjoyable activities to maintain motivation.
Maintaining a Balanced Lifestyle:
Integrating Nutrition and Exercise: Suggests meal planning and incorporating physical activity into daily routines.
Monitoring Progress: Recommends tracking food intake and exercise, regular health check-ups, and provides tips for achieving balance, such as getting sufficient sleep, managing stress, and staying socially active.
2. Where are we - too many questions?
• What therapy should we use?What therapy should we use?
• When should we start it?When should we start it?
• What are we trying to achieve?What are we trying to achieve?
• How much therapy is enough?How much therapy is enough?
• When do we stop/switch?When do we stop/switch?
• Can we improve outcomes?Can we improve outcomes?
Does the literature help us?Does the literature help us?
5. AKI classification systems 2: AKINStage Creatinine criteria Urine output criteria
1
1.5 - 2 x baseline (or rise > 26.4
µmol/L)
< 0.5 ml/kg/hour for > 6 hours
2 >2 - 3 x baseline < 0.5 ml/kg/hour for > 12 hours
3
> 3 x baseline (or > 354 µmol/L
with acute rise > 44 µmol/L)
< 0.3 ml/kg/hour for 24 hours or
anuria for 12 hours
Patients receiving RRT are Stage 3 regardless of creatinine or urine output
6. Acute Kidney Injury in the ICU
• AKIis common: 3-35%* of admissions
• AKI is associated with increased mortality
• “Minor” rises in Cr associated with worse outcome
• AKI developing after ICU admission (late) is
associated with worse outcome than AKI at
admission (APACHE underestimates RODAPACHE underestimates ROD)
• AKI requiring RRT occurs in about 4-5% of ICU
admissions and is associated with worst mortality
risk **
* Brivet, FG et al. Crit Care Med 1996; 24: 192-198
** Metnitz, PG et al. Crit Care Med 2002; 30: 2051-2058
7. Mortality by AKI Severity (1)
Clermont, G et al. Kidney International 2002; 62: 986-996
8. Mortality by AKI Severity (2)
Bagshaw, S et al. Am J Kidney Dis 2006; 48: 402-409
9. RRT for Acute Renal Failure
• There is some evidenceThere is some evidence for a relationship
between higher therapy dose and better
outcome, at least up to a point
• This is true for IHD* and for CVVH**
• There is nono definitive evidencedefinitive evidence for superiority
of one therapy over another, and wide
practice variation exists***
• Accepted indications for RTT vary
• No definitive evidenceNo definitive evidence on timing of RRT
*Schiffl, H et al. NEJM 2002; 346: 305-310 ** Ronco, C et al. Lancet 2000; 355: 26-30
*** Uchino, S. Curr Opin Crit Care 2006; 12: 538-543
10. Therapy Dose in IRRTp = 0.01
p = 0.001
Schiffl, H et al. NEJM 2002; 346: 305-310
11. Therapy Dose in CVVH
25 ml/kg/hr
35 ml/kg/hr
45 ml/kg/hr
Ronco, C et al. Lancet 2000; 355: 26-30
12. Outcome with IRRT vs CRRT (1)
• Trial quality low: many
non-randomized
• Therapy dosing variable
• Illness severity variable or
details missing
• Small numbers
• Uncontrolled technique,
membrane
• Definitive trial would
require 660 patients in each
arm!
• Unvalidated instrument
for sensitivity analysis
Kellum, J et al. Intensive Care Med 2002; 28: 29-37
“there is insufficient evidence to establish whether CRRT is associated with
improved survival in critically ill patients with ARF when compared with IRRT”
13. Outcome with IRRT vs CRRT (2)
Tonelli, M et al. Am J Kidney Dis 2002; 40: 875-885
• No mortality difference between therapies
• No renal recovery difference between therapies
• Unselected patient populations
• Majority of studies were unpublished
14. Outcome with IRRT vs CRRT (3)
Vinsonneau, S et al. Lancet 2006; 368: 379-385
15. Proposed Indications for RRT
• Oliguria < 200ml/12 hours
• Anuria < 50 ml/12 hours
• Hyperkalaemia > 6.5 mmol/L
• Severe acidaemia pH < 7.0
• Uraemia > 30 mmol/L
• Uraemic complications
• Dysnatraemias > 155 or < 120 mmol/L
• Hyper/(hypo)thermia
• Drug overdose with dialysable drug
Lameire, N et al. Lancet 2005; 365: 417-430
17. The Ideal Renal Replacement
Therapy
• Allows control of intra/extravascular volume
• Corrects acid-base disturbances
• Corrects uraemia & effectively clears “toxins”
• Promotes renal recovery
• Improves survival
• Is free of complications
• Clears drugs effectively (?)
• Allows control of intra/extravascular volume
• Corrects acid-base disturbances
• Corrects uraemia & effectively clears “toxins”
• Promotes renal recovery
• Improves survival
• Is free of complications
• Clears drugs effectively (?)
18. Solute Clearance - Diffusion
• Small (< 500d) molecules
cleared efficiently
• Concentration gradient critical
• Gradient achieved by
countercurrent flow
• Principal clearance mode of
dialysis techniques
• Small (< 500d) molecules
cleared efficiently
• Concentration gradient critical
• Gradient achieved by
countercurrent flow
• Principal clearance mode of
dialysis techniques
19. Solute Clearance – Ultrafiltration &
Convection (Haemofiltration)
• Water movement “drags” solute
across membrane
• At high UF rates (> 1L/hour) enough
solute is dragged to produce
significant clearance
• Convective clearance dehydrates the
blood passing through the filter
• If filtration fraction > 30% there is
high risk of filter clotting*
• Also clears larger molecular weight
substances (e.g. B12, TNF, inulin)
* In post-dilution haemofiltration
23. Intradialytic Hypotension: Risk Factors
• LVH with diastolic dysfunction oror LV systolic dysfunction / CHF
• Valvular heart disease
• Pericardial disease
• Poor nutritional status / hypoalbuminaemia
• Uraemic neuropathy or autonomic dysfunction
• Severe anaemia
• High volume ultrafiltration requirements
• Predialysis SBP of <100 mm Hg
• Age 65 years +
• Pressor requirement
• LVH with diastolic dysfunction oror LV systolic dysfunction / CHF
• Valvular heart disease
• Pericardial disease
• Poor nutritional status / hypoalbuminaemia
• Uraemic neuropathy or autonomic dysfunction
• Severe anaemia
• High volume ultrafiltration requirements
• Predialysis SBP of <100 mm Hg
• Age 65 years +
• Pressor requirement
24. Managing Intra-dialytic Hypotension
• Dialysate temperature modelling
• Low temperature dialysate
• Dialysate sodium profiling
• Hypertonic Na at start decreasing to 135 by end
• Prevents plasma volume decrease
• Midodrine if not on pressors
• UF profiling
• Colloid/crystalloid boluses
• Sertraline (longer term HD)
• Dialysate temperature modelling
• Low temperature dialysate
• Dialysate sodium profiling
• Hypertonic Na at start decreasing to 135 by end
• Prevents plasma volume decrease
• Midodrine if not on pressors
• UF profiling
• Colloid/crystalloid boluses
• Sertraline (longer term HD)
2005 National Kidney Foundation K/DOQI GUIDELINES
27. SCUF
• High flux membranes
• Up to 24 hrs per day
• Objective VOLUME control
• NotNot suitable for solute clearance
• Blood flow 50-200 ml/min
• UF rate 2-8 ml/min
• High flux membranes
• Up to 24 hrs per day
• Objective VOLUME control
• NotNot suitable for solute clearance
• Blood flow 50-200 ml/min
• UF rate 2-8 ml/min
28. CA/VVH
• Extended duration up to weeks
• High flux membranes
• Mainly convectiveconvective clearance
• UF > volume control amount
• Excess UF replacedreplaced
• Replacement pre- or post-filter
• Blood flow 50-200 ml/min
• UF rate 10-60 ml/min
• Extended duration up to weeks
• High flux membranes
• Mainly convectiveconvective clearance
• UF > volume control amount
• Excess UF replacedreplaced
• Replacement pre- or post-filter
• Blood flow 50-200 ml/min
• UF rate 10-60 ml/min
29. CA/VVHD
• Mid/high flux membranes
• Extended period up to weeks
• DiffusiveDiffusive solute clearance
• Countercurrent dialysate
• UF for volume control
• Blood flow 50-200 ml/min
• UF rate 1-8 ml/min
• Dialysate flow 15-60 ml/min
• Mid/high flux membranes
• Extended period up to weeks
• DiffusiveDiffusive solute clearance
• Countercurrent dialysate
• UF for volume control
• Blood flow 50-200 ml/min
• UF rate 1-8 ml/min
• Dialysate flow 15-60 ml/min
30. CVVHDF• High flux membranes
• Extended period up to weeks
• DiffusiveDiffusive & convective& convective solute
clearance
• Countercurrent dialysate
• UF exceeds volume control
• ReplacementReplacement fluid as required
• Blood flow 50-200 ml/min
• UF rate 10-60 ml/min
• Dialysate flow 15-30 ml/min
• Replacement 10-30 ml/min
• High flux membranes
• Extended period up to weeks
• DiffusiveDiffusive & convective& convective solute
clearance
• Countercurrent dialysate
• UF exceeds volume control
• ReplacementReplacement fluid as required
• Blood flow 50-200 ml/min
• UF rate 10-60 ml/min
• Dialysate flow 15-30 ml/min
• Replacement 10-30 ml/min
31. SLED(D) & SLED(D)-F : Hybrid therapy
• Conventional dialysis equipment
• Online dialysis fluid preparation
• ExcellentExcellent small molecule detoxification
• Cardiovascular stability as good as CRRT
• Reduced anticoagulation requirement
• 11 hrs SLED comparable to 23 hrs CVVH
• Decreased costs compared to CRRT
• Phosphate supplementation requiredFliser, T & Kielstein JT. Nature Clin Practice Neph 2006; 2: 32-39
Berbece, AN & Richardson, RMA. Kidney International 2006; 70: 963-968
32. Kinetic Modelling of Solute Clearance
CVVH (predilution) Daily IHD SLED
Urea TAC (mg/ml) 40.3 64.6 43.4
Urea EKR (ml/min) 33.8 21.1 31.3
Inulin TAC (mg/L) 25.4 55.5 99.4
Inulin EKR (ml/min) 11.8 5.4 3.0
β2 microglobulin TAC (mg/L) 9.4 24.2 40.3
β2 microglobulin EKR (ml/min) 18.2 7.0 4.2
TAC = time-averaged concentration (from area under concentration-time curve)
EKR = equivalent renal clearanceEKR = equivalent renal clearance
Inulin represents middle molecule and β2 microglobulin large molecule.
CVVH has marked effects on middle and large molecule clearance not seen with IHD/SLED
SLED and CVVH have equivalent small molecule clearance
Daily IHD has acceptable small molecule clearance
Liao, Z et al. Artificial Organs 2003; 27: 802-807
38. Peak Concentration Hypothesis• Removes cytokines from blood compartment during
pro-inflammatory phase of sepsis
• Assumes blood cytokine level needs to fallAssumes blood cytokine level needs to fall
• Assumes reduced “free” cytokine levels leads to
decreased tissue effects and organ failure
• Favours therapy such as HVHF, UHVHF, CPFA
• But tissue/interstitial cytokine levels unknownunknown
• Removes cytokines from blood compartment during
pro-inflammatory phase of sepsis
• Assumes blood cytokine level needs to fallAssumes blood cytokine level needs to fall
• Assumes reduced “free” cytokine levels leads to
decreased tissue effects and organ failure
• Favours therapy such as HVHF, UHVHF, CPFA
• But tissue/interstitial cytokine levels unknownunknown
Ronco, C & Bellomo, R. Artificial Organs 2003; 27: 792-801
39. Threshold Immunomodulation
Hypothesis• More dynamic view of cytokine system
• Mediators and pro-mediators removed from blood to alter tissue
cytokine levels but blood level does not need to fallbut blood level does not need to fall
• ? pro-inflammatory processes halted when cytokines fall to
“threshold” level
• We don’t know when such a point is reached
• More dynamic view of cytokine system
• Mediators and pro-mediators removed from blood to alter tissue
cytokine levels but blood level does not need to fallbut blood level does not need to fall
• ? pro-inflammatory processes halted when cytokines fall to
“threshold” level
• We don’t know when such a point is reached
Honore, PM & Matson, JR. Critical Care Medicine 2004; 32: 896-897
40. Mediator Delivery Hypothesis• HVHF with high incoming fluid volumes (3-6 L/hour) increases
lymph flow 20-40 times
• “Drag” of mediators and cytokines with lymph
• Pulls cytokines from tissues to blood for removal and tissue
levels fall
• High fluid exchange is key
• HVHF with high incoming fluid volumes (3-6 L/hour) increases
lymph flow 20-40 times
• “Drag” of mediators and cytokines with lymph
• Pulls cytokines from tissues to blood for removal and tissue
levels fall
• High fluid exchange is key
Di Carlo, JV & Alexander, SR. Int J Artif Organs 2005; 28: 777-786
41. High Volume Hemofiltration
• May reduce unboundunbound fraction of cytokines
• Removes
– endothelinendothelin-II (causes early pulm hypertension in sepsis)
– endogenous cannabinoidsendogenous cannabinoids (vasoplegic in sepsis)
– myodepressant factormyodepressant factor
– PAI-IPAI-I so may eventually reduce DIC
• Reduces post-sepsis immunoparalysis (CARS)
• Reduces inflammatory cell apoptosis
• Human trials probably using too low a dosetoo low a dose (40
ml/kg/hour vs 100+ ml/kg/hour in animals)
• May reduce unboundunbound fraction of cytokines
• Removes
– endothelinendothelin-II (causes early pulm hypertension in sepsis)
– endogenous cannabinoidsendogenous cannabinoids (vasoplegic in sepsis)
– myodepressant factormyodepressant factor
– PAI-IPAI-I so may eventually reduce DIC
• Reduces post-sepsis immunoparalysis (CARS)
• Reduces inflammatory cell apoptosis
• Human trials probably using too low a dosetoo low a dose (40
ml/kg/hour vs 100+ ml/kg/hour in animals)
42. CRRT, Haemodynamics & Outcome
• 114 unstable (pressors or MAP < 60) patients
• 55 stable (no pressors or MAP > 60) patients
• Responders = 20% fall in NA requirement or 20%
rise in MAP (without change in NA)
• Overall responder mortality 30%, non-responder
mortality 74.7% (p < 0.001)
• In unstable patients responder mortality 30% vs
non-responder mortality 87% (p < 0.001)
• Haemodynamic improvement after 24 hours CRRT
is a strong predictor of outcome
• 114 unstable (pressors or MAP < 60) patients
• 55 stable (no pressors or MAP > 60) patients
• Responders = 20% fall in NA requirement or 20%
rise in MAP (without change in NA)
• Overall responder mortality 30%, non-responder
mortality 74.7% (p < 0.001)
• In unstable patients responder mortality 30% vs
non-responder mortality 87% (p < 0.001)
• Haemodynamic improvement after 24 hours CRRT
is a strong predictor of outcome
Herrera-Gutierrez, ME et al. ASAIO Journal 2006; 52: 670-676
43. Common Antibiotics and CRRT
These effects will be even more dramatic with HVHF
Honore, PM et al. Int J Artif Organs 2006; 29: 649-659