The document describes the history and evolution of minimally invasive cardiac surgery, including early procedures using smaller incisions rather than full sternotomy, and the development of techniques like port-access bypass which use peripheral cannulation and an endoaortic balloon to occlude the aorta and allow procedures like CABG or mitral valve surgery to be done through smaller incisions. It also covers the various approaches and techniques used for minimally invasive procedures, as well as patient selection considerations and how to harvest vessels like the LIMA through smaller incisions.
Improving patient comfort by reducing pain is one of the concerns of a cardiac surgeon. Making the procedure less invasive is one of the ways bys which surgeons aim to achieve this.
Minimally invasive surgery is performed through a small incision, often using specialized surgical instruments. The incision is about three to four inches instead of the six to eight inch incision required for traditional surgery.
Improving patient comfort by reducing pain is one of the concerns of a cardiac surgeon. Making the procedure less invasive is one of the ways bys which surgeons aim to achieve this.
Minimally invasive surgery is performed through a small incision, often using specialized surgical instruments. The incision is about three to four inches instead of the six to eight inch incision required for traditional surgery.
Cardiopulmonary bypass development and history
Indication of cpb
Hardware in cpb
Arterial and venous cannulation
Oxygenator
Heat exchanger
Filter
How to conduct cpb and problems in cpb
Cardioplegia
Cardiopulmonary bypass development and history
Indication of cpb
Hardware in cpb
Arterial and venous cannulation
Oxygenator
Heat exchanger
Filter
How to conduct cpb and problems in cpb
Cardioplegia
Transeptal access is an integral skill for interventional cardiologists for a multitude of cardiac interventions including,
balloon mitral valvotomy a commonly performed procedure
in India and south Asia. The procedure was first performed by
Braunwald, Ross and Morrow and later refined by Brockenbrough
and Mullins, whose names have been intricately
linked with this procedure.1e3 The procedure, however,
evokes considerable trepidation in many young interventionalists due its steep learning curve and potential catastrophic complications. However, the procedure is relatively
simple in most patients, barring patients with extremely distorted
anatomy like aneursymally dilated left/right atria
where the anatomy of the interatrial septum is often grossly
altered.
A case of giant mediastinal liposarcoma of thymic origin a rare clinical entityDr.Debmalya Saha
Abstract
Thymoliposarcoma is an exceedingly rare tumor of thymus with a very few
cases reported till date. This case study presents a 45-year male with rare type
of thymoma. On the contrast-enhanced CT images, there was a large mass lesion
of predominantly fat attenuation in the pre-vascular compartment of the
mediastinum insinuating on both sides of the visceral compartment of the
mediastinum, and extending upto the bilateral cardio phrenic and anterior
costophrenic angles, anterior to the right ventricle with loss of fat plane with
the pericardium, with few sub-centimetric lymph nodes in the right paratracheal
and AP window and a calcified right hilar lymph node, suggestive of
well-differentiated liposarcoma/thymoliposarcoma. Initial CT guided tru-cut
tissue biopsy was inconclusive, and the repeat biopsy revealed as fibro-
collagenous tissue with area of necrosis, focal myxoid changes in the
background with presence of cells which are spindle to oval in shape with
mild nuclear pleomorphism and negative for S100, Cytokeratin, CD34, desmin.
The entire tumor was resected en masse after meticulous dissection
without the support of cardiopulmonary bypass (CPB) with an intact pericardium.
Final histopathology report of the surgical biopsy specimens is consistent
with dedifferentiated thymoliposarcoma with focal ganglionic cell differentiation.
Postoperative follow-up CECT of thorax revealed no evidence of
residual mass in the pre-vascular compartment. The patient is disease-free
and asymptomatic after 6-month and he is under routine follow-up under
Radiotherapy department since he received 30 Gy of postoperative radiotherapy
(PORT).
Implication of preoperative glycosylated hemoglobin level on short term outco...Dr.Debmalya Saha
ABSTRACT
Background: Diabetes mellitus is one of the significant risk factors for adverse outcomes after coronary artery bypass surgery. The glycosylated haemoglobin i.e. HbA1c is a reliable diagnostic test to know the long-term glycemic status. The objective of the study is to investigate the implication of preoperative HbA1c level on short term outcomes after coronary artery bypass grafting (CABG).
Method: Total 218 patients were studied, and the data were collected retrospectively. Patients are distributed into group 1 with HbA1c≤7 (good glycemic control) and group 2 with HbA1c>7 (poor glycemic control). The parameters studied for short term outcomes were revision due to bleeding, duration of mechanical ventilation, cerebrovascular accident (CVA), atrial fibrillation (AF), renal failure requiring dialysis, infective complications like sternal and leg wound infection, mediastinitis, pneumonia, urinary tract infection (UTI), sepsis; length of ICU stay and in-hospital mortality.
Result: In comparison to group 1, patients of group 2 showed statistically significant more morbidity in view of short-term outcomes in this study.
Conclusion: HbA1c>7 is associated with statistically significant adverse short-term outcomes after CABG.
Abstract- Because of the complexity of the procedures, high level of clarification for the patients as well as their attendants while taking consent is a must as cardiac surgery is associated with significant morbidity and mortality. Pictorial consent with pre-operative education is a far better option in this regard. We randomly took a total of 150 patients within the age group of 18 to 70 years, and they were explained with standard consent followed by pictorial consent and vice versa by the same informant. And they were given a preset questionnaire format after both consents. Later, based on their answers, comparison in relation to the level of clarity was done. Questionnaire was formatted after rigorous modification from the reviews of literature.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
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MANAGEMENT OF ATRIOVENTRICULAR CONDUCTION BLOCK.pdfJim Jacob Roy
Cardiac conduction defects can occur due to various causes.
Atrioventricular conduction blocks ( AV blocks ) are classified into 3 types.
This document describes the acute management of AV block.
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Anti ulcer drugs and their Advance pharmacology ||
Anti-ulcer drugs are medications used to prevent and treat ulcers in the stomach and upper part of the small intestine (duodenal ulcers). These ulcers are often caused by an imbalance between stomach acid and the mucosal lining, which protects the stomach lining.
||Scope: Overview of various classes of anti-ulcer drugs, their mechanisms of action, indications, side effects, and clinical considerations.
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
2. Introduction
• Heart surgery performed through several small incisions instead of
the traditional open-heart surgery that requires a median
sternotomy approach.
3. History
• Minimally invasive cardiac surgery started with mitral valve procedures and then gradually expanded
towards other valve procedures, coronary artery bypass grafting, and various types of simple
congenital heart procedures.
• In the mid 1990s, Cosgrove and Cohn independently described the first minimally invasive MVS
(MIMVS). These operations were performed through parasternal and hemi-sternotomy approaches.
• Carpentier et al. in February of 1996 performed the first video-assisted mitral valve repair (MVR)
through a mini thoracotomy using ventricular fibrillation.
• In 1998, Mohr et al. reported the Leipzig University experience of MIMVS using port-access
technology, which was based on endoaortic balloon occlusion (EABO) rather than direct aortic
clamping and voice-activated robotic assistance.
• The next major leap in the evolution of MIMVS was the development of robotic telemanipulation, and
in 1998 Carpentier et al. performed the first completely robotic mitral valve repair using the Da Vinci
Surgical System (Intuitive Surgical, Inc., Sunnyvale, CA).
4. • MICS CABG (Minimally Invasive Cardiac Surgery/Coronary Artery Bypass Grafting) or the McGinn technique
was invented by Dr Joseph T McGinn, Jr.
• The first minimally invasive coronary surgery was performed in the United States on January 21, 2005 at The
Heart Institute at Staten Island University Hospital in Staten Island, New York by a team led by Dr. Joseph T.
McGinn.
• This technique is an off-pump coronary artery bypass surgery. The procedure is much less invasive than
traditional bypass surgery because it is performed through three small incisions rather than the traditional
sternotomy.
• Since its first procedure, over 1000 MICS CABG procedures have been performed at The Heart Institute and
elsewhere around the world.
• Other centers that utilize the MICS CABG technique for coronary heart disease are the University of Ottawa
Heart Center (ON, Canada), Houston Methodist DeBakey Heart Center (Houston, TX), and Vanderbilt
University Medical Center (Nashville, TN)
6. Advantages of Traditional approach
• Has withstood the test of time
• All Surgeons are comfortable with it.
• Provides ideal operating conditions
• Provides full access to heart for
-CABG
-Valve surgery
-Intracardiac repair
-Pericardial/extracardiac repair.
• Allows full control on circulation & oxygenation.
7. Disadvantages of traditional approaches
• Painful
• Increased blood loss
• Prolonged healing times ~ 4-6 wks
• Sternal wound complications
• Cosmetically non-appealing
8. Advantages of MICS
• Cosmetically better
• Less pain
• Less blood loss
• Rapid wound healing ~ 2wks
• Minimization of sternal wound complications
• Reduced postoperative ICU & hospital stay.
9. Disadvantages of MICS
• Technically demanding
• Requires specialized training at dedicated centres.
• Expensive
• Not appropriate for every patient.
10. Contra-indications of MICS
• Morbid obesity
• Previous lung surgery or infection
• Severe LV dysfunction
• Associated other valve or coronary problem
11. MICS – Surgeries performed
• Via Right antero-lateral mini thoracotomy
-Mitral valve surgery
-Tricuspid valve surgery
-ASD closure
-Atrial tumor resection e.g. Myxoma
• Via upper partial mini sternotomy(hemisternotomy)
-Aortic valve surgery
-PFO closure
-Thymectomy
• Via lower partial mini sternotomy(hemisternotomy)
-Mitral valve surgery
-Tricuspid valve surgery
-ASD closure
12. • Via Left antero-lateral mini thoracotomy
-MIDCAB
-MICS
• Via Subxiphoid incision
-Access to Posterior descending artery and distal OM vessels
-Pericardial window
-Access in reoperative cases of epicardial ablation
13.
14. Techniques of minimally invasive CABG
• MIDCAB (minimally invasive direct coronary artery bypass grafting)
LIMA harvesting and coronary artery anastomosis are performed,
without bypass, through a small anterior thoracotomy incision.
• EndoACAB (endoscopic atraumatic coronary artery bypass grafts)
LIMA is harvested thorascopically, then coronary anastomosis is
performed, off-pump, through a small anterior thoracotomy incision.
• Port-access CABG (port-access coronary artery bypass grafting)
LIMA harvesting, and coronary artery anastomosis on bypass, are
performed through a small anterior thoracotomy, aortic occlusion
and delivery of cardioplegia are endovascular.
• TECAB (totally endoscopic coronary artery bypass grafting)
LIMA harvesting and coronary artery anastomosis are performed, off
bypass, thorascopically: the coronary artery anastomosis is usually
performed with robotic assistance, and/or anastomotic aids
15. Smaller incisions
• Anterior MIDCAB
There are two main options:
• (1) 6–10cm incision from the left border of the sternum over the 4th rib
which may be resected, or
• (2) a 5–7cm muscle splitting incision over the 4th rib space extending
towards the nipple, from 2cm lateral to the left sternal edge.
• A Finochietto, West self-retaining or soft-tissue retractor is used. The
pericardium is hitched to the chest wall with 1/0 silk sutures.
• Suitable for:
• MIDCAB (minimally invasive direct coronary artery bypass grafting).
• Endo ACAB (endoscopic atraumatic coronary artery bypass grafting).
16.
17. Right minithoracotomy
• A 6–10cm incision is made along the 4th rib space extending from
the level of the nipple to the anterior axillary line, or following the
breast crease.
• Pectoralis major is divided or split, and the intercostal muscle raised
off the inferior rib anteriorly to 1cm lateral to the sternum (avoiding
the RIMA) and laterally round to the costal angles to mobilize the rib
space.
• A mini Cosgrove, McCarthy, or similar mitral retractor with narrow
blades is placed between the ribs and the pericardium opened well
above the right phrenic nerve.
• It is possible to cannulate the aorta, SVC, IVC, and coronary sinus
directly through this, or peripherally in order to create more space.
19. Hemisternotomy
• A full sternotomy can be performed through a very low 6–10cm skin incision in
most patients and gives excellent access for mitral and aortic surgery.
• A hemisternotomy is an alternative where only the upper or lower 2/3 of the
sternum is divided. Its main disadvantage is the risk of tearing the IMA or
intercostals when opening the retractor.
• A 6–10cm incision is made in the midline from an inch or so above the
xiphisternum to an inch or so below the angle of Louis. The sternum is divided
from xiphisternum to the 3rd or 4th intercostal space where it is ‘t’d’ to the right
(lower hemisternotomy) or from the sternal notch down to the 3rd or 4th
intercostal space (upper hemisternotomy).
• The tissue over the 4th rib space is divided as far as pectoralis major which may be
entered in a muscle splitting fashion, or divided with cautery. Occasionally it may
be necessary to divide or resect part of a rib to obtain better access.
• This incision is used for:
• Upper hemisternotomy: aortic valve surgery, thymectomy.
• Lower hemisternotomy: mitral and tricuspid valve surgery, ASD.
20. Subxiphoid incision
• This approach involves a 4–6cm incision extending from the xiphoid
process which is divided, caudally.
• The pericardium is entered above the diaphragm.
• This approach allows access to:
• The PDA and distal OM vessels if extended caudally.
• Pericardial window.
• Access in reoperative cases for epicardial ablation
21. Thorascopic approaches
• A modification of the left VATS approach described for thoracic procedures,
requiring double lumen intubation and single lung ventilation can be used to
harvest the LIMA and RIMA, and perform distal coronary anastomoses (usually
directly via a MIDCAB incision).
• The main differences in set up are:
- External defibrillator paddles are placed.
-The radial arterial line should be sited on the right side.
-The patient is placed at a 30 angle with the hips horizontal and the left arm
above the head.
-The patient is prepped so that the groin and the midline are accessible.
-The port sites are positioned as described in picture.
-CO2 is infused at 6–8mmHg by a pressure-regulated insufflator.
- A Harmonic scalpel is used by most surgeons to harvest the LIMA as
there is less smoke, and local heat injury is less.
23. CPB through small incisions
• Standard central cannulation can be modified for smaller incisions
without majorly compromising safety or efficacy.
• Arterial and venous cannulation, clamping, venting, and delivery of
cardioplegia can each be done via peripheral or central access.
• The primary benefit is cosmetic: observational data shows mixed
benefits in terms of pain control, recovery, blood loss, or extubation,
and there is some evidence to suggest disadvantages include longer
bypass times, lower mitral repair rates, and under-revascularization.
• Femoral arterial cannulation and retrograde flow is associated with
an increased stroke risk in older patients and vasculopaths, who should
always be identified by CT angiography if this strategy is considered.
24. Set-up for minithoracotomy mitral
Standard aorto-bicaval cannulation and cardioplegia delivery
• In many patients a right 4th intercostal minithoracotomy allows
reasonable access to the aorta to cannulate: use the Fem-Flex Seldinger
cannula as it is not possible to get your hand and a standard cannula in the
incision. Better exposure of the aorta is obtained by carefully hitching up
the pericardium and gentle caudal retraction on the aorta.
• The SVC and IVC are easily cannulated through this incision using standard
single-stage cannulas, either directly or via the right atrial appendage. If
vacuum assist is used, smaller cannulas will still provide excellent drainage.
• Retrograde cardioplegia catheters can be easily placed in the standard
fashion. The antegrade cardioplegia cannula is most easily placed once on
bypass.
• A Chitwood or flexible snake clamp is used to clamp the aorta. Lung
isolation is needed for central cannulation: otherwise femoral cannulation
allows institution of bypass and ventilation to be discontinued prior to
thoracotomy.
25. An 18‐Fr Fem‐Flex Duraflo‐treated femoral arterial
cannula (Baxter) (D) with 3 dilators (A‐C).
27. Peripheral alternatives
• Any of these can be used to improve access or reduce incision size:
-Femoral arterial cannulation (avoid in elderly or arteriopathic
patients).
-Femoral venous cannulation (percutaneous or open) usually
with vacuum assist to enhance venous drainage.
-Percutaneous internal jugular vein cannulation (anesthesiology).
-Percutaneous internal jugular retrograde cardioplegia
cannulation.
-Fibrillatory rather than cardioplegic arrest (if no more than trace
AI).
28. Port-access bypass
• This involves fem-fem bypass, but also occludes the ascending aorta
with a balloon (the endoclamp) inserted via the femoral artery
allowing delivery of antegrade root cardioplegia.
• The heart can be arrested on bypass, enabling mitral valve surgery, as
well as CABG, to be carried out through smaller, usually thoracotomy
or thorascopic (port), incisions.
• Aortic surgery is not possible because of difficulty in maintaining the
balloon occlusion distal to the aortotomy without occluding the head
and neck vessels.
• Aortic dissection complicates around 1% of port access CPB.
29. Technique
• As the surgeon is not able to visualize the cannulas or cardioplegia delivery system
additional monitoring is mandatory.
• Radial arterial lines are sited bilaterally, and TEE routinely used so that migration of the
arterial cannula or cardioplegia delivery system can be detected.
• Make a 2–3cm groin crease incision overlying the femoral vessels. Obtain proximal and
distal control of the vessels with slings.
• After heparinization pass a 22F venous cannula into the RA via the femoral vein under
TEE control, so the tip is in the SVC.
• Using vacuum assist enhances venous drainage.
• Cannulate the femoral artery with a dual port arterial return catheter and position the tip
of the cannula in the aortic arch using TEE.
• Again under TEE pass the endoclamp down the second limb of the femoral cannula so
that the tip sits just above the sinotubular junction.
• The endoclamp consists of a triple lumen catheter with an inflatable balloon at the tip:
the balloon is inflated to occlude the aorta via the first lumen, the second allows aortic
root pressure to be transduced and is used as a root vent, and the third delivers
cardioplegia.
30. The EndoClamp catheter
for occluding the aorta
and for delivery of
cardioplegia and venting.
Note the inflated balloon
at the tip of the catheter
for aorta occlusion and
the three side-ports:
yellow for cardioplegia
delivery and venting of
the aorta and the other
two ports for balloon
inflation/deflation and for
monitoring aortic
pressure.
31. • After institution of CPB inflate the endoclamp with 20–30mL of saline,
aiming for a balloon pressure of 250–350mmHg.
• De-airing is critical.
• If there is any forward ejection of the heart the balloon will migrate
distally, so it is important to ensure complete emptying of the heart.
• It is possible to puncture the balloon (e.g., while placing anterior
mitral annuloplasty sutures): completing the procedure under
fibrillatory arrest or replacing the balloon are both options.
• Contraindications to port-access bypass
-Severe peripheral vascular disease.
-Intraluminal atherosclerosis of the aortic arch.
-Aortic valve or ascending aorta procedures.
33. LIMA harvest via small incisions
Key facts
• The LIMA can be harvested to a variable extent through several incisions.
• It is important to obtain a long length (preferably the entire length) of LIMA
because:
- If the LIMA is tethered to the chest wall it will tend to kink.
-If the LIMA is short it will place the anastomosis under tension.
-A short length of LIMA will not reach the LAD in patients with distal
disease or COPD.
-A long length facilitates sequential grafting.
- The risk of coronary steal from patent IMA branches is avoided
34.
35. Anterior, lateral, and mid-lateral MIDCAB
incisions
• There are a number of specialized retractors which enable the LIMA
to be harvested from 1st to 5th rib space from the right of the patient
in a manner similar to that used in a median sternotomy approach.
36. Thorascopic IMA takedown
• This is an alternative method of harvesting the IMA which has several
advantages.
-Firstly, rib resection and retraction are avoided.
-Secondly, the entire length of the IMA can be mobilized, avoiding kinking, tension on
the anastomosis, and IMA steal.
Disadvantages:
-Harvest takes longer, with a longer learning curve.
-Double lumen intubation and single lung ventilation is required, which not all patients
- tolerate well.
-Insufflation of CO2 may result in hemodynamic compromise
-Uncontrollable hemorrhage may mandate median sternotomy.
Patient selection
• The following are relative contraindications to thoracoscopic LIMA harvest:
-Lung disease making single lung ventilation impossible.
-Previous thoracic surgery resulting in pleural adhesions.
37. Anesthesia and positioning the patient
• The patient is then positioned in the lateral, decubitus position with spine
parallel to and close to the edge of the table, using sandbags, or rolls and
tape, usually with the upper arm positioned on a rest, the lower arm flexed
in-front of the head, and the table ‘broken’ (a little head down and a little
feet down) so that the hips do not obstruct VATS instruments, and the rib
spaces open up a little.
• The patient’s left armpit should be shaved. It may be helpful to mark the
anterior and midaxillary lines as well as the 4th rib space and midline with
indelible pen prior to prepping.
38. Harvesting the LIMA thoracoscopically
• Filmy adhesions can usually be divided without wasting too much time, but dense
adhesions make introduction of ports and instruments hazardous, and the
thoracoscopic approach should be abandoned.
• If the LIMA is not obvious, it is easiest to identify it just distal to its origin from the
subclavian artery where it is covered by a thin layer of parietal pleura. The middle
1/3 is frequently covered by fat, and the distal 1/3 by the innermost intercostals
and pericardial fat.
• The camera can be held either by an assistant or by a voice-activated arm.
• Incision of the parietal pleura lateral to the LIMA with cautery.
• Retraction of the pleura with forceps and use a combination of cautery and blunt
dissection with the blade of the diathermy to separate the LIMA pedicle from the
thoracic wall.
• LIMA branches are best divided by direct coagulation as clipping individual
branches means frequent instrument changes, increasing operative time and the
risk to adjacent structures.
39. • Some surgeons advocate skeletonizing the LIMA as a more precise
dissection and longer length is allowed: this is at the risk of increased
trauma to the LIMA.
• Insufflation of CO2 to a pressure of 5–15mmHg, if tolerated by the
patient, enlarges the operative field facilitating the distal dissection.
• Once an adequate length is secured heparin is given (150U/kg).
• The LIMA is ligated with two large clips and all but a few muscle
strands divided, so that it is held in the anatomical orientation while
the thoracotomy incision is made, through which it can be brought
under direct vision.
40. SVG harvest via small incisions
• Key facts
• In addition to significant postoperative pain and decreased mobility, the
standard method of harvesting the saphenous vein through a long,
continuous incision results in delayed wound healing due to cellulitis,
lymphoceles, edema, large skin flaps, fat necrosis, hematoma,sympathetic
dystrophy.
• Much of this can be avoided by using either endoscopic or hybrid
approaches which maintain skin bridges.
• The advantage of the standard open approach is that the ‘no touch’
technique preserves endothelial integrity: minimally invasive approaches
result in much more direct handling of the vein and there is some
observational data suggesting this may be associated with reduced long-
term patency rates.
41. Methods of minimally invasive SVG harvest
Using a vein stripper Endoscopic vein harvest
42.
43. (a) Set up for robotic surgery. (b) Device for performing proximal
coronary anastomosis without using a clamp on the aorta.
44. Mitral surgery via right minithoracotomy
• Preoperative selection and preparation
-This approach requires either single lung ventilation or peripheral cannulation.
-Port-access bypass should be monitored via bilateral radial arterial lines.
-A TEE is mandatory to assess valve and ventricular function and de-airing.
-The patient is positioned with the right chest elevated by 30–45o,shoulders tilted back, and right arm either suspended above the head
or well behind the posterior axillary line.
-External defibrillator pads should be placed. Expose both groins.
• Technique of surgery
-Set-up for aorto-caval and fem-fem bypass via this approach is described befoe.
-Port-access cannulation is described before
-The right 4th rib is exposed by a 6–8cm submammary skin incision,divided, and a mini-McCarthy/modified Cosgrove retractor inserted.
-The right lung is deflated, the pericardium incised 2cm anterior to the phrenic nerve under direct vision as far as the aortic reflection, and
the posterior pericardial edge hitched firmly to the skin edge rotating the heart so that the left atrium is uppermost , and the anterior
pericardium hitched to the chest wall to expose the aorta.
45. • A port and 0o camera can be placed through the 3rd rib space.
• If port-access bypass is not being used, an aortic root vent and cardioplegia catheter can be
placed directly (easiest in the decompressed heart on bypass), and the aorta cross-clamped by
inserting the cross-clamp through a 5mm incision in the 3rd intercostal space or directly with a
flexible clamp.
• Fibrillation is an alternative to cardioplegia.
• Sondergaard’s groove is dissected for 1–2cm, a small atriotomy is made medial to the right
superior pulmonary vein, and a purpose designed retractor inserted to expose the mitral valve.
• Endoscopic instruments are used. Knot-tiers may not be necessary in slim patients. Tricuspid and
maze procedures can be performed.
• The left atriotomy is closed under direct vision in the standard fashion.
48. Aortic valve surgery
• The aortic valve can be accessed via an upper sternotomy incision or a small right
anterior thoracotomy.
• The technique is a modified version of the standard open technique, although
port-access bypass can be used instead of aorto-caval bypass.
• Retrograde cardioplegia is used if desired, and the heart is vented via the right
superior pulmonary vein, or LV via the dome of the LA.
• De-airing is carried out under TEE guidance in the standard fashion, but lifting the
heart is done using internal defibrillator paddles.
49. Minimally Invasive coronary surgery compared to STernotomy coronary
artery bypass grafting: The MIST trial
• Published : January 09, 2019 in Contemporary Clinical Trial
• The MIST Trial is a multi-centre, prospective, open label, randomized control trial comparing
quality of life and recovery in the early post-operative period, between patients undergoing MICS
CABG versus patients undergoing sternotomy CABG. Patients referred for isolated CABG for multi-
vessel coronary artery disease and deemed technically suitable for sternotomy CABG as well as
for MICS CABG are considered for enrollment into the trial. Quality of life questionnaires (The SF-
36, Seattle Angina Questionnaire and EQ-5D-5L) will be used to assess the quality of life and
recovery in patients undergoing sternotomy CABG or MICS CABG at 1 month, 3 months, 6 months
and 12 months follow up.
• Sponsor: Ottawa Heart Institute Research Corporation
• Collaborators:
London Health Sciences Centre,Heart Center Leipzig - University Hospital,Fortis Escorts
Heart Institute(New Delhi),The Methodist Hospital System,Carolinas Medical Center,Gundersen
Lutheran Health System,Jilin Heart Hospital,Far Eastern Memorial Hospital,Medtronic,Apollo
Hospital(Bengaluru),Ichinomiya-Nishi Hospital,Fresno Heart and Surgical Hospital
50. Actual Study Start Date : September 1, 2018
Estimated Primary Completion
Date : March 1, 2022
Estimated Study Completion
Date : March 1, 2025
Inclusion Criteria:
•18 years of age or older
•Angiographically-confirmed multi-vessel coronary artery disease lesions with >=70% in at least 2 major
epicardial vessels in 2 or more coronary artery territories (left anterior descending (LAD), circumflex (CX)
and right coronary artery (RCA)) OR lesions >=50% in the left main (LM)
•Patients who, in the opinion of the investigator, are amenable for coronary surgery through either
median sternotomy or minimally-invasive approach.
•Patients who are willing and able to comply with all follow-up study visits.
51. Exclusion Criteria:
• <18 years of age
• concomitant cardiac procedure with CABG (e.g. valve repair or replacement)
• Previous cardiac surgery, mediastinal irradiation, or significant trauma to the
chest
• Contra-indications for MICS CABG, including : severe pectus excavatum; severe
pulmonary disease; hemodynamically significant left subclavian stenosis; morbid
obesity; severe left ventricular (LV) dysfunction; no adequate PDA or marginal
branch target; absence of femoral pulse bilaterally.
• Contraindications for conventional CABG via sternotomy
• Concomitant life-threatening disease likely to limit life expectancy to <2 years
• Emergency CABG with hemodynamic compromise
• Inability to provide informed consent.