67: Da DO2: Fundamental ECMO Physiology with Sage Whitmore

Have you ever wondered about how initiating ECMO changes the cardiovascular physiology?  Have you wondered what metrics you should be looking at when resuscitating a patient that has a beating heart and a ECMO flow?  Dr. Sage Whitmore, an ED Intensivist from Nashville with ECMO training from UMichigan, leads us through the basic to the tough questions of ECMO physiology.

66: Crash VV ECMO

Have you ever wondered how you would crash someone onto VV ECMO?  Have you ever wondered where is the best place to put the cannulas?  Have stayed up late at night wondering which patients in your department could benefit from VV rather than VA ECMO?  Then this is the episode for you!!  After a few recent cases of crash VV ECMO in our hospital, we have decided to focus on the subject.  Zack gets critical care physician and ECMO director Dr. David Willms to answer from a very practical standpoint the who, what, where of crash VVECMO.

 

 

 

 

 

 

 

 

Great images from Penn – Femoral Jugular approach

Femoral Femoral Approach

 

 

 

 

 

 

 

Aortic Dissection recent paper and Editorial

https://www.resuscitationjournal.com/article/S0300-9572(20)30309-9/fulltext

https://www.resuscitationjournal.com/article/S0300-9572(20)30435-4/pdf

 

64: Contraindicated??? – Long Live the Aortic Dissection with Garrett Sterling

Aortic Dissection is a contraindication for ECMO….or is it?  In this episode, Zack Shinar and Garrett Sterling discuss the sticky topic of ECMO for aortic dissection.  They discuss a recent case where Joe Bellezzo, Karl Limmer, Craig Larsen, and the entire Sharp team save a Type A aortic dissection with cardiac arrest.

Zack and Garrett traverse the details around ECMO in aortic dissection ranging from VA ECMO in ECPR to VVECMO for pulmonary edema.  They go through the literature on the subject and make some conclusions based on this data. The ultimate question – “Is Aortic Dissection a Contraindication for ECMO?”

Joe's interview of Michael – Great to hear his memory of the event.

Michael's podcast on his experience – The Heart of the Matter

 

 

Hou XT, Sun YQ, Zhang HJ, Zheng SH, Liu YY, Wang JG. Femoral artery

cannulation in Stanford type A aortic dissection operations. Asian Cardiovasc

Thorac Ann. 2006 Feb;14(1):35-7. PubMed PMID: 16432116.

 

Kelly C, Ockerse P, Glotzbach JP, Jedick R, Carlberg M, Skaggs J, Morgan DE.

Transesophageal echocardiography identification of aortic dissection during

cardiac arrest and cessation of ECMO initiation. Am J Emerg Med. 2019

Jun;37(6):1214.e5-1214.e6. doi: 10.1016/j.ajem.2019.02.039. Epub 2019 Feb 27.

PubMed PMID: 30862393.

 

Yukawa T, Sugiyama K, Miyazaki K, Tanabe T, Ishikawa S, Hamabe Y. Treatment of

a patient with acute aortic dissection using extracorporeal cardiopulmonary

resuscitation after an out-of-hospital cardiac arrest: a case report. Acute Med

Surg. 2017 Dec 19;5(2):189-193. doi: 10.1002/ams2.324. eCollection 2018 Apr.

PubMed PMID: 29657734; PubMed Central PMCID: PMC5891112

62: Jason Bartos Take 2: The Future of ECPR Now

Last month you heard Jason talk about the ECPR program at the University of Minnesota.  This month Zack and Jason talk about post initiation care and the crazy ECPR realities that Demetris, Jason and U of M have created.  The sky is the limit for their team!

61: Jason Bartos – ECPR Redefined

Jason Bartos and his crew at the University

Image result for university of minnesota cardiology"

of Minnesota have revolutionized the concept of ECPR for out of hospital cardiac arrests.  His crew are interventional cardiologists who take OHCA straight to the cardiac cath lab.  They have initiate times of around 6-8 minutes and have neurologically intact survival rates higher than 30%.  Below are two of Jason’s recent papers which every person who considers themselves an ECPR fan should pour over with a fine-toothed comb.  There is so much in these papers.  We split this interview into two pieces because there is so many pearls in it.

 

Outcomes

Resuscitation paper – 48% survival in 100 patients

Circulation paper 2020– 33% vs. 23% ALPS

  • Cohort who had VF/VT and one shock vs. a cohort who had VF/VT and failed to ROSC at the scene, in the ambulance, and then all the way to the hospital.
  • OHCA – > Straight to the Cath lab –> Get on ECMO –> Go to CCU under Cards care.
  • Inclusion criteria – Vf/vt, lactate <18, paO2 >50,ETCO2>10

 

References:

Bartos JA, Grunau B, Carlson C, Duval S, Ripeckyj A, Kalra R, Raveendran G,
John R, Conterato M, Frascone RJ, Trembley A, Aufderheide TP, Yannopoulos D.
Improved Survival with Extracorporeal Cardiopulmonary Resuscitation Despite
Progressive Metabolic Derangement Associated with Prolonged Resuscitation.
Circulation. 2020 Jan 3. doi: 10.1161/CIRCULATIONAHA.119.042173. [Epub ahead of
print] PubMed PMID: 31896278.

Bartos JA, Carlson K, Carlson C, Raveendran G, John R, Aufderheide TP,
Yannopoulos D. Surviving refractory out-of-hospital ventricular fibrillation
cardiac arrest: Critical care and extracorporeal membrane oxygenation management.
Resuscitation. 2018 Nov;132:47-55. doi: 10.1016/j.resuscitation.2018.08.030. Epub
2018 Aug 29. PubMed PMID: 30171974.

60: ECPR 2.0 with Scott Weingart

     We've had some recent episodes on ECMO physiology.  Today's episode focuses on the differences between ECMO physiology in the patient in cardiogenic shock versus the one in cardiac arrest. Scott Weingart talks with Zack about how the difference between these two patient populations is HUGE!  Scott also mentions details about cannulation and some critical post ECMO initiation pearls.

 

 

 

 

ECPR 2.0

The Patient
1. OOH Cardiac Arrest Patients are Different

Cannulation
2. Ultrasound-Guided Percutaneous Placement
3. Wire choices
4. Wire Location Verification
5. Small arterial cannulae
6. Simpler Circuits

Post-Pump Critical Care
7. Find the Injuries
8. Mandatory leg perfusion
9. Lower Anticoagulation Goals
10. Lower Flow Goals
11. Try to avoid venting – Truby et al. PMID:28422817, less is more
12. Understanding Cardiac Prognostication / Stunning
13. Understanding Neuro Prognostication
14. Protection/Ownership
15. In it for the Long Haul

 

59: Partial REBOA and US PreHospital ECPR Revisited

This month we discuss two different topics we've recently had on the podcast.  Albuquerque had started the first US prehospital ECPR program…. and now they have the first patient as well.  Jon and Darren will share with us the exciting news.  Second, we recently had Matt Martin on the podcast talking about partial REBOA.  We got tons of email about this.  This month Zaf Qasim and Austin Johnson come on to talk about some of the controversial aspects of partial REBOA.  Zaf also gives us a great update on the state of REBOA in the world.

 

55 – Anticoagulation of the ECMO Patient with Troy Seelhammer

Do you give heparin to your ECMO patients?  Well, let's rethink this.  This episode is All Things Anticoagulation!  Zack talks with Troy Seelhammer, an intensivist from Mayo Clinic Rochester.  He manages ECMO patients in his daily practice there.  He has become a master of the subject of anticoagulation.  He will talk about heparin, bilvalirudin, or maybe no anticoagulation.  We talk about how TEG can affect our management.  We talk about PCC and Protamine when bleeding just won't stop.  He talks about the when to be aggressive and when to cut back.  Below is a wonderful synopsis of Troy's thoughts on anticoagulation on pump.

 

Goal Heparin levels are far from perfect but some suggestions

APTT 1.5 to 2.5 times normal

ACT level – 180-220 seconds

Antithrombin Levels – next generation

 

Seelhammer doc on BivalirudinBivalirudin & TEG During ECMO

 

54: Confirmation of Wire Placement with Sacha Richardson

In this episode, Sacha Richardson talks with Zack about a problem common to all ECPR programs- how do we confirm the placement of the wires?  During chest compressions and even in patients with a pulse, confirmation of which vessel you have cannulated can be difficult.  Sacha shares some tricks and trips on how to get real time confirmation of the wires.  Sacha also gives us a preview of some of the exciting endeavors that he has undertaken in Melbourne with pre-hospital ECMO.

53b: Resuscitationist Inserted Distal Perfusion Catheter with Chris Couch

 

In this episode, we again explore the world of the distal perfusion catheter.  You heard from Joe Dubose the vascular surgeons point of view; now let's see how non-surgeon resuscitationists are dealing with this problem.  You will hear from Chris Couch, a critical care trained emergency physician from Dallas Texas and his colleague Omar Hernandez who have some novel thoughts and experiences related to when and how we insert these catheters.  You will hear about checking compartment pressures, poor man's way to “fluoro” your catheter, and much more.

 

Great summary of supporting literature – DPC Lit Search