Acute Crit Care.  2019 Nov;34(4):263-268. 10.4266/acc.2019.00577.

How small is enough for the left heart decompression cannula during extracorporeal membrane oxygenation?

• Kim S
• Kim JS
• Shin JS
• Shin HJ

• KMID: 2467305
• DOI: http://doi.org/10.4266/acc.2019.00577

Abstract

BACKGROUND
Left ventricular (LV) distension is a recognizable problem accompanied by subsequent complications during venoarterial extracorporeal membrane oxygenation (VA-ECMO). However, no gold standard for LV decompression has been established, and no minimal flow requirement has been designated. Thus, we evaluated the efficacy of the 8-Fr Mullins sheath for left heart decompression during VA-ECMO in adult patients.
METHODS
Left heart decompression was performed when severe pulmonary edema was detected on chest radiography or when no generation of pulse pressure followed severe LV dysfunction in patients receiving VA-ECMO. We punctured the interatrial septum and inserted an 8-Fr Mullins sheath into the left atrium via the femoral vein. The sheath was connected to the venous catheter used for ECMO. The catheter was maintained during VA-ECMO.
RESULTS
The left heart decompression procedure was performed in seven of 35 patients who received VA-ECMO between February 2017 and June 2018. Three patients had acute myocardial infarction; three, fulminant myocarditis; and one, dilated cardiomyopathy. Four patients showed noticeable improvement of pulmonary edema within 3 days, and three patients with a pulse pressure of <10 mm Hg showed an increase in pulse pressure of >20 mm Hg within 24 hours from the left heart decompression procedure. All seven patients were successfully weaned from VA-ECMO. No complications related to the left heart decompression procedure occurred.
CONCLUSIONS
An 8-Fr sheath may be a possible option for left heart decompression in adult patients with LV distension under VA-ECMO who are expecting recovery of LV function.

Keyword

extracorporeal membrane oxygenation; left heart decompression; left ventricular distension

MeSH Terms

Adult
Blood Pressure
Cardiomyopathy, Dilated
Catheters*
Decompression*
Extracorporeal Membrane Oxygenation*
Femoral Vein
Heart Atria
Heart*
Humans
Myocardial Infarction
Myocarditis
Pulmonary Edema
Radiography
Thorax

Figure

• 

  Figure 1. Improvement of pulmonary edema after left heart decompression catheter insertion. (A) Chest radiograph taken immediately after left heart decompression catheter insertion. (B) Chest radiograph taken 24 hours after venting catheter insertion.

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