r-evar is it feasible? - linc2019.cncptdlx.com · mohamed ismail, md. ain shams university...
TRANSCRIPT
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R-EVAR is it feasible?
Mohamed Ismail, MD.Ain shams university
Cairo,EGYPT
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Disclosure
Speaker name:
.................................................................................
I have the following potential conflicts of interest to report:
Consulting
Employment in industry
Stockholder of a healthcare company
Owner of a healthcare company
Other(s)
I do not have any potential conflict of interestx
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Background
ruptured abdominal aortic aneurysms (rAAAs) have high mortality (35– 5 5%) and morbidity
rates when treated by standard open - surgical methods
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NEEDS
• Professional team
• High learning curve
• Faclities
• Inventory
• Protocols
• Trained nurses and technicians
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Tricks
• Keep the left arm away from anesthesia
• Resuscitation or hypotensive
• Occlusion balloons from least tortuous iliac
artery
• Double balloon (tandem) technique
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Permissive Hypotension
strict restriction of fluid and blood resuscitation in the rAAA setting is mandatory. If blood pressure is in the 50 – 70 mmHg range, it should be left there.
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Take Care
Patients with rAAAs frequently deteriorate with induction of anesthesia. If that occurs and the
blood pressure falls below 50 mmHg or is unobtainable, administration of fluid and blood
become necessary
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the intra-operative administration of intravenous
heparin during open or endovascular rAAA repair is controversial.
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DVT
According to the American College of ChestPhysicians, patients undergoing repair of a rAAAare categorised as high risk for the developmentof deep venous thrombosis (DVT)
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MORTALITY
The reported perioperative (in hospital or 30 day)mortality rates after EVAR for rAAAs vary in theliterature and range from 13% to 53%
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COMPLICATIONS
however, a recent analysis of the Vascular Quality Initiative (2003e 2013)database (514 EVAR, 651 OSR) suggested that EVAR is associated with lower inhospital morbidity than OSR. Specifically, the incidence of cardiac complications(EVAR, 29% vs. OSR, 38%; p ¼ 0.001), respiratory complications (28% vs. 46%; p< 0.0001), renal insufficiency (24% vs. 38%; p < 0.0001), lower extremityischaemia (2.7% vs. 8.1%; p < 0.0001), and bowel ischaemia (3.9% vs. 10%; p <0.0001) were significantly lower after EVAR than after OSR.
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In the most recent publication from the IMPROVE trial, the re-intervention rates were similar after EVAR and OSR for rAAA and most common in the first 90 days
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Abdominal Hypertension
IAH is defined as a sustained or repeatedpathological elevation in IAP > 12 mmHg. ACS isdefined as a sustained intraabdominal pressure(IAP) > 20 mm Hg (with or without an abdominalperfusion pressure < 60 mmHg) that is associatedwith new organ dysfunction/failure. Abdominalperfusion pressure is defined as the mean arterialpressure minus the IAP.
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Abdominal compartemenmtal
• AP is most easily measured by means of bladderpressure through a urinary drainage catheter.
• chemical markers have been studied in an attempt todiagnose the onset of ACS at an earlier time. Horer etal placed microdialysis catheters into the peritonealcavity and found that elevated lactate/pyruvate ratiosand glycerol levels were early markers that wereassociated with the subsequent development of ACS
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When IAH/ACS is suspected, at first, non-surgicalmanagement should be attempted to reduce IAP. If conservative measures prove unsuccessful and a full blown ACS has developed, decompression is indicated.
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Conservative management• Improve abdominal wall compliance
Pain relief (epidural anaesthesia)
Avoid morphine
Neuromuscular blockade (may reduce IAP by 50%)
• Evacuate intra-luminal/abdominal content
Nasogastric decompression
Paracentesis (seldom feasible)
• Correct positive fluid balance
Avoid over resuscitation and crystalloids
Whole blood and colloids (20% albumin)
Diuretics (furosemide)
Renal replacement therapy if indicated
• Organ support
Optimize ventilation (PEEP)
Vasopressors (APP > 60 mmHg)
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Our example case
Male pt 70yrs, smoker
HTN,DM
Presented by abdominal pain , destintion and attack of hypotension followed by normotensive state
CT angiography was done
Sudden drop of Bl pr to 70/40 with pulse rate 120
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Transferred to OR
Aortic balloon under local anathesia
Resuscitation was done aftrer proximal control
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postoperative
Vitally stable
HGB 10
IAP 22-28 mm HG
Nasogastric tube with rectal tube and monitoring with very low dose of diuretics ,lower the IAP to 17 mm HG
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6 Months
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CONCLUSION
REVAR is feasible with special requirement and suitable anatomy ,abdominal compartment is still
one of major complication specially with endovascular treatment of rAAA
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R-EVAR is it feasible?
Mohamed Ismail, MD.Ain shams university
Cairo,EGYPT