Daniel Davis, MD UCSD Center for Resuscitation Science ART: A New Model of Resuscitation
Goals To convince you that: Training affects performance Performance affects outcomes
Objectives What is ART? Seven commandments of cardiac arrest Post-arrest care Pre-arrest care Sample patient flow diagrams Skills training
UCSD Center for Resuscitation Science People should not die before they are done living.
Our Mission To prevent the preventable To resuscitate the resuscitatable To recognize the futile
Elevated life support training from a regulatory requirement into the primary vehicle for addressing all resuscitation-related issues.
ART Model Scaffolding for resuscitation program Flexible, adaptive training Integrated curriculum Agency-specific algorithm, equipment Cognitive psychology Expert instructors Competency assessments & CQI data
 
Oxygenation Ventilation Perfusion
Integrated Critical Care Model PART BART ART HeART TART RAT AART PhART
Arrest Survival
Arrest Survival
Prevention
 
Arrest Incidence
Arrest Survival
Overall Impact
Arrest-Related Deaths
ART responsible for more than 85% of the decrease! Overall Impact
ED Arrest Survival
CPR in Progress
San Diego EMS Baseline Training #1 Training #2
El Cajon Cardiac Arrests 1.6% Survival 9.0% Survival Cogntiive training
Confirm ETCO2 EDD Breath sounds SaO2 Maximize 1 st  Attempt Prevent  Hypoxic  Arrest Overall Intubation  Success BVM 1  until return  of spontaneous respirations SaO2<94% Obstructed SaO2  94% Anterior Anticipate problem Traumatized Unsuccessful 5 Successful Successful Abandon attempt 3 SaO2  94% “ Can’t intubate, can oxygenate” SaO2<94% “ Can’t intubate, can’t oxygenate” Can maintain SaO2 ~90% Can’t maintain  SaO2 ~90% Successful Unsuccessful Unable intubate Unsuccessful Successful 1 Tight seal, jaw thrust, Sellick maneuver, NPA/OPA 2 Look, External (3-3-2), Mallampati, Obstruction, Neck (manual ILS)  3 SaO2 dropping below 95%, clearly unable to intubate, bradycardia 4 May not work with upper airway obstruction; may need to adjust position 5 Consider repeating etomidate/succinylcholine Normal Able to intubate NRB 1-3” Preoxygenate with NRB BVM 1 Preload bougie Access cric kit Consider Miller Sellick  Sedative Paralytic SaO2  94% BVM 1 1 st  Look External laryngeal  manipulation (ELM) BVM 1 (Consider other intubator or immediate transport) SaO2 <94% Bougie ELM Miller blade Suction/Magills  Bougie Cricothyrotomy Rapid Airway  Access Combitube/LMA 4 Cricothyrotomy Other intubator (OTI/bougie) Pre-assessment (LEMON) 2 Suction Combitube/ LMA 4 Cricothyrotomy 1 st  Attempt
Airway Management
Airway Management Preoxygenation Approach
Air Medical Arrests
Traumatic Brain Injury 83.3% 80.6% 78.5%
Cardiac Arrest
 
Commandment I Arrest victims should have high quality compressions performed from the moment of arrest until ROSC is assured.
Prime the Pump! Kern (2002)  Circulation
Stay on the chest! Christenson (2009)  Circulation *  Adjusted for:  age, gender, bystander CPR, public location, response time, compression rate
Codus Interruptus Initiating compressions Rhythm analysis Shock sequence Pulse check Intubation Vascular access
Bystander CPR
Stiell et al (2008)  AHA Scientific Sessions Deeper Compressions
Aufderheide (2005)  Resuscitation Recoil?
CPR Process Data
Results Chest compression fraction 91% Compression rate  123/min Compression depth  2.6 inches Pre-shock pause 2.6 sec Post-shock pause 3.6 sec Perfusion check 4.3 sec Ventilation rate 9.7/min PetCO2 15.3 mmHg
 
Return of Spontaneous Circulation Electrical (HR) Mechanical (PetCO2)
Lung Perfusion in Shock
PaCO2 40 mmHg PetCO2 37 mmHg 40 40 40 40 40 40
PaCO2 40 mmHg PetCO2 23 mmHg 0 40 40 40 0 40
PaCO2 40 mmHg PetCO2 11 mmHg 0 40 0 40 0 0
Capnometry
53 y/o female visiting San Diego with husband Riding in Pedi-Cab downtown Turns too sharply, flips over Patient strikes occiput on curb with immediate loss-of-consciousness Case
Case
Paramedics find patient obtunded SBP 160, HR 75, agonal respirations, GCS 3 BVM ventilations initiated Spinal precautions, IV started, monitoring Case
HR decr to 27    “Cushing’s response” Unable to get SpO2 reading Proceeded with ETI protocol Unable to obtain PetCO2 reading x 2 monitors Return to BVM ventilation ED – GCS 3, apnea, HR 23, SpO2 UTO  Case
Chest compressions started PetCO2 to 13 mmHg Good recoil from compressions PetCO2 to 19 mmHg Vasopressin 40u IV, epinephrine 1mg IV HR to 110 PetCO2 to 37 mmHg Case
Compression pause for perfusion check No palpable femoral pulses PetCO2 35-38 mmHg Compressions restarted, then stopped Trauma attending confirmed palpable femoral pulse CT head revealed nonsurvivable TBI Multi-organ donor Case
ROSC Predictors HR EtCO2
 
Energy 120 J CO2
Energy 150 J CO2
Energy 150 J CO2
Energy 150 J CO2
 
 
Commandment II Pressors augment compressions.
Pressors Mader (2008)  Resuscitation
 
Commandment III Ventilations (10:1 synchronous) provide oxygenation for prolonged or non-VF arrests.
Ventilation? Kern (2002)  Circulation
Ventilation Sigurdsson et al (2003)  Curr Opin Crit Care
Continuous Chest Compressions  with Synchronous Ventilations (10:1)
Bag-Valve-Mask
 
Commandment IV Compressions (with a pressor) should precede all shocks except the initial shocks in a monitored VF/VT arrest.
Priming the Pump
 
Priming the Pump Holzer (2004)  Anesth Analg
Clear? <3 sec 6.7 Odds <6 sec 10.7 Odds Shock Both 13.1 Odds
Clear?
 
 
Secondary VF
 
Commandment V Search for a reversible cause of arrest.
 
Commandment VI Control ventilation, support hemodynamics, decrease FiO2 and consider hypothermia after ROSC.
Hyperventilation: Two Flavors
Hypocapneic Vasoconstriction Idris (in preparation)
Cerebral Perfusion During Shock P = .004 v 12 P = .004 v 12 mL/100 gm/min
Brain Oxygenation During Shock P = .0016 vs 12 P = .0046 vs 12 mm Hg
EtCO2 & Cerebral Perfusion
Hyperventilation: Two Flavors
Rapid, Shallow Breaths? Davis (in preparation)
Intrathoracic Pressure Davis (in preparation)
Hyperventilation Davis, Bulger (2005-08) Crit Care Med,  J Trauma
Why should we cool?
Evidence for Hypothermia
Evidence for Hypothermia Hypothermia After Cardiac Arrest Study Group (2002)  NEJM
Who should we cool?
Early Hypothermia Abella (2004) Circulation
Prehospital Hypothermia Kim (2007)  Circulation
 
It’s not the fall… It’s the landing!
CO 2 ATP 3 Na + 2 K + ATP O 2 Glucose X Ischemia/Reperfusion ROS
Hyperoxia?
Hyperoxia? Davis (2010)  Neurotrauma
 
Commandment VII Prevention beats resuscitation every time.
Objective: To Cheat This Man!
Hypoxemia & Hypotension
Circulation & Ventilation
 
Rapid Response Criteria Respiratory Respiratory distress Hypoxemia Hypercapnia Work of breathing Tachypnea Infectious Fever Clinical Intuition Intuitive sense that something is wrong Circulation Hypoperfusion Tachycardia Hypotension Others Neurologic Change in mental status New neurological deficits
Circulation
Circulation Treatment Positioning Supine IV Fluids Bolus, maintenance Pressors Inotropes Vasoconstrictors Codes STEMI SEPSIS Blue (CPR) Triggers Chief complaint CP, SOB Vitals/exam BP, HR Mental status Temp Laboratory/monitor Lactate, BD, bicarb ST elev PVC’s/Vtach CVP, CO, SVR
Ventilation
Ventilation
Ventilation Treatment Positioning Upright Oxygen NC, NRB NPA, OPA Medications Bronchodilators CHF treatment Ventilatory support BVM assist, BiPAP Intubation Triggers Chief complaint SOB Vitals/exam Work of breathing RR, SpO 2 Mental status Temp Laboratory/monitor ABG EtCO 2 PVC’s/Vtach
Shark Hook?
Shark Hook?
Baseline (13:51)
Baseline (13:51)
Seizure (14:03)
Seizure (14:03)
Postictal with Inspiratory Stridor (14:06)
Postictal with Inspiratory Stridor (14:06)
Desaturating (14:13)
ST Elevations (14:23)
Bigeminy (14:24)
Airway Management (14:44 to 14:48)
Clinical Course ST Elevation SpO2 HR SBP
Clinical Course Ruled in for MI Troponins, EKG evolution Echo with moderate global hypokinesis Repeat unchanged Cath = no coronary artery disease
 
Positioning
Positioning Rolls onto side
Seated Resuscitation?
 
Helpful Hints Impart enthusiasm and hope! Part of something big and exciting Be an expert…or at least invoke one Cognitive psychology Makes “BLS before ALS” more exciting Continually reference algorithm Admit that we don’t know everything
UCSD Center for Resuscitation Science People should not die before they are done living.

Ventura la ttt

Editor's Notes

  • #12 This animal model demonstrates why current CPR protocols are inadequate. This represents “perfect” CPR by current standards – machine-driven CPR from the moment the switch is flipped with perfect rate and depth and an optimal compression:ventilation ratio of 15:2. It is worth noting that the pauses for ventilation here are much shorter than in “real life” CPR, whether by laypersons or professionals, which only magnifies the problems seen here. Graphed in the background are aortic and RA pressures – the two components of CPP. Observe that it takes the entire cycle of chest compressions before the threshold for CPP is reached (represented by the horizontal line). Once this value is obtained, there are only a few compressions left before a pause for ventilation. The decline in aortic pressure is even faster than the gradual rise. This would suggest that standard “optimal” CPR will never adequately prime the heart.
  • #21 This animal model demonstrates why current CPR protocols are inadequate. This represents “perfect” CPR by current standards – machine-driven CPR from the moment the switch is flipped with perfect rate and depth and an optimal compression:ventilation ratio of 15:2. It is worth noting that the pauses for ventilation here are much shorter than in “real life” CPR, whether by laypersons or professionals, which only magnifies the problems seen here. Graphed in the background are aortic and RA pressures – the two components of CPP. Observe that it takes the entire cycle of chest compressions before the threshold for CPP is reached (represented by the horizontal line). Once this value is obtained, there are only a few compressions left before a pause for ventilation. The decline in aortic pressure is even faster than the gradual rise. This would suggest that standard “optimal” CPR will never adequately prime the heart.
  • #29 These data are from the SD Trauma Registry and suggest an optimal arrival pCO2 range, with both hyper- and hypoventilation leading to poor outcomes. The adjusted odds ratios take into account the following: age, gender, mechanism, Head AIS, ISS, GCS, hypotension, and base deficit.
  • #33 This animal model demonstrates why current CPR protocols are inadequate. This represents “perfect” CPR by current standards – machine-driven CPR from the moment the switch is flipped with perfect rate and depth and an optimal compression:ventilation ratio of 15:2. It is worth noting that the pauses for ventilation here are much shorter than in “real life” CPR, whether by laypersons or professionals, which only magnifies the problems seen here. Graphed in the background are aortic and RA pressures – the two components of CPP. Observe that it takes the entire cycle of chest compressions before the threshold for CPP is reached (represented by the horizontal line). Once this value is obtained, there are only a few compressions left before a pause for ventilation. The decline in aortic pressure is even faster than the gradual rise. This would suggest that standard “optimal” CPR will never adequately prime the heart.
  • #34 This animal model demonstrates why current CPR protocols are inadequate. This represents “perfect” CPR by current standards – machine-driven CPR from the moment the switch is flipped with perfect rate and depth and an optimal compression:ventilation ratio of 15:2. It is worth noting that the pauses for ventilation here are much shorter than in “real life” CPR, whether by laypersons or professionals, which only magnifies the problems seen here. Graphed in the background are aortic and RA pressures – the two components of CPP. Observe that it takes the entire cycle of chest compressions before the threshold for CPP is reached (represented by the horizontal line). Once this value is obtained, there are only a few compressions left before a pause for ventilation. The decline in aortic pressure is even faster than the gradual rise. This would suggest that standard “optimal” CPR will never adequately prime the heart.
  • #36 This animal model demonstrates why current CPR protocols are inadequate. This represents “perfect” CPR by current standards – machine-driven CPR from the moment the switch is flipped with perfect rate and depth and an optimal compression:ventilation ratio of 15:2. It is worth noting that the pauses for ventilation here are much shorter than in “real life” CPR, whether by laypersons or professionals, which only magnifies the problems seen here. Graphed in the background are aortic and RA pressures – the two components of CPP. Observe that it takes the entire cycle of chest compressions before the threshold for CPP is reached (represented by the horizontal line). Once this value is obtained, there are only a few compressions left before a pause for ventilation. The decline in aortic pressure is even faster than the gradual rise. This would suggest that standard “optimal” CPR will never adequately prime the heart.
  • #37 This demonstrates the importance of recoil, with good CPR on the top (although its worth pointing out that the ventilation rate is too fast) as evidenced by a negative intrathoracic pressure with each cycle, and bad CPR on the bottom with continuous positive intrathoracic pressure due to incomplete recoil.
  • #38 This demonstrates the importance of recoil, with good CPR on the top (although its worth pointing out that the ventilation rate is too fast) as evidenced by a negative intrathoracic pressure with each cycle, and bad CPR on the bottom with continuous positive intrathoracic pressure due to incomplete recoil.
  • #39 This animal model demonstrates why current CPR protocols are inadequate. This represents “perfect” CPR by current standards – machine-driven CPR from the moment the switch is flipped with perfect rate and depth and an optimal compression:ventilation ratio of 15:2. It is worth noting that the pauses for ventilation here are much shorter than in “real life” CPR, whether by laypersons or professionals, which only magnifies the problems seen here. Graphed in the background are aortic and RA pressures – the two components of CPP. Observe that it takes the entire cycle of chest compressions before the threshold for CPP is reached (represented by the horizontal line). Once this value is obtained, there are only a few compressions left before a pause for ventilation. The decline in aortic pressure is even faster than the gradual rise. This would suggest that standard “optimal” CPR will never adequately prime the heart.
  • #63 This animal model demonstrates why current CPR protocols are inadequate. This represents “perfect” CPR by current standards – machine-driven CPR from the moment the switch is flipped with perfect rate and depth and an optimal compression:ventilation ratio of 15:2. It is worth noting that the pauses for ventilation here are much shorter than in “real life” CPR, whether by laypersons or professionals, which only magnifies the problems seen here. Graphed in the background are aortic and RA pressures – the two components of CPP. Observe that it takes the entire cycle of chest compressions before the threshold for CPP is reached (represented by the horizontal line). Once this value is obtained, there are only a few compressions left before a pause for ventilation. The decline in aortic pressure is even faster than the gradual rise. This would suggest that standard “optimal” CPR will never adequately prime the heart.
  • #66 This animal model demonstrates why current CPR protocols are inadequate. This represents “perfect” CPR by current standards – machine-driven CPR from the moment the switch is flipped with perfect rate and depth and an optimal compression:ventilation ratio of 15:2. It is worth noting that the pauses for ventilation here are much shorter than in “real life” CPR, whether by laypersons or professionals, which only magnifies the problems seen here. Graphed in the background are aortic and RA pressures – the two components of CPP. Observe that it takes the entire cycle of chest compressions before the threshold for CPP is reached (represented by the horizontal line). Once this value is obtained, there are only a few compressions left before a pause for ventilation. The decline in aortic pressure is even faster than the gradual rise. This would suggest that standard “optimal” CPR will never adequately prime the heart.
  • #67 These animal data suggest that part of the detrimental effect of overventilation may be immunologic and that this effect is most profound within the first 2 hours of injury.
  • #68 This demonstrates the importance of recoil, with good CPR on the top (although its worth pointing out that the ventilation rate is too fast) as evidenced by a negative intrathoracic pressure with each cycle, and bad CPR on the bottom with continuous positive intrathoracic pressure due to incomplete recoil.
  • #72 These VF tracings demonstrate the priming effect from an electrophysiological perspective. As pointed out with the 3-phase model schematic, the morphology of VF changes as time passed. The VF at 1 min is well within the electrical phase, with greater amplitude and median frequency. After 8 min, the morphology is very different; a shock at this point would likely be unsuccessful in producing ROSC. However, after only 90 sec of chest compressions, the morphology looks similar to the “fresh” VF on the left. It is worth pointing out that the experimental model for producing PEA is to induce VF, wait 8 min, and shock without antecedent chest compressions – exactly what many EMS systems would currently advocate. This issue will resurface when we discuss the control group for the CPR timing study.
  • #74 These VF tracings demonstrate the priming effect from an electrophysiological perspective. As pointed out with the 3-phase model schematic, the morphology of VF changes as time passed. The VF at 1 min is well within the electrical phase, with greater amplitude and median frequency. After 8 min, the morphology is very different; a shock at this point would likely be unsuccessful in producing ROSC. However, after only 90 sec of chest compressions, the morphology looks similar to the “fresh” VF on the left. It is worth pointing out that the experimental model for producing PEA is to induce VF, wait 8 min, and shock without antecedent chest compressions – exactly what many EMS systems would currently advocate. This issue will resurface when we discuss the control group for the CPR timing study.
  • #79 These VF tracings demonstrate the priming effect from an electrophysiological perspective. As pointed out with the 3-phase model schematic, the morphology of VF changes as time passed. The VF at 1 min is well within the electrical phase, with greater amplitude and median frequency. After 8 min, the morphology is very different; a shock at this point would likely be unsuccessful in producing ROSC. However, after only 90 sec of chest compressions, the morphology looks similar to the “fresh” VF on the left. It is worth pointing out that the experimental model for producing PEA is to induce VF, wait 8 min, and shock without antecedent chest compressions – exactly what many EMS systems would currently advocate. This issue will resurface when we discuss the control group for the CPR timing study.
  • #92 These data are from the SD Trauma Registry and suggest an optimal arrival pCO2 range, with both hyper- and hypoventilation leading to poor outcomes. The adjusted odds ratios take into account the following: age, gender, mechanism, Head AIS, ISS, GCS, hypotension, and base deficit.
  • #100 This graph demonstrates the importance of the lowest and final end-tidal CO2 values in predicting mortality – much more important than any of the oxygenation measures.
  • #102 This graph demonstrates the importance of the lowest and final end-tidal CO2 values in predicting mortality – much more important than any of the oxygenation measures.
  • #103 This graph demonstrates the importance of the lowest and final end-tidal CO2 values in predicting mortality – much more important than any of the oxygenation measures.
  • #107 This animal model demonstrates why current CPR protocols are inadequate. This represents “perfect” CPR by current standards – machine-driven CPR from the moment the switch is flipped with perfect rate and depth and an optimal compression:ventilation ratio of 15:2. It is worth noting that the pauses for ventilation here are much shorter than in “real life” CPR, whether by laypersons or professionals, which only magnifies the problems seen here. Graphed in the background are aortic and RA pressures – the two components of CPP. Observe that it takes the entire cycle of chest compressions before the threshold for CPP is reached (represented by the horizontal line). Once this value is obtained, there are only a few compressions left before a pause for ventilation. The decline in aortic pressure is even faster than the gradual rise. This would suggest that standard “optimal” CPR will never adequately prime the heart.
  • #108 This animal model demonstrates why current CPR protocols are inadequate. This represents “perfect” CPR by current standards – machine-driven CPR from the moment the switch is flipped with perfect rate and depth and an optimal compression:ventilation ratio of 15:2. It is worth noting that the pauses for ventilation here are much shorter than in “real life” CPR, whether by laypersons or professionals, which only magnifies the problems seen here. Graphed in the background are aortic and RA pressures – the two components of CPP. Observe that it takes the entire cycle of chest compressions before the threshold for CPP is reached (represented by the horizontal line). Once this value is obtained, there are only a few compressions left before a pause for ventilation. The decline in aortic pressure is even faster than the gradual rise. This would suggest that standard “optimal” CPR will never adequately prime the heart.