Cannula tip separation and configuration as determinants of recirculation in venovenous ECMO
Elliott T Worku, Michael G Pittard, Richard J Totaro · 2026
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Description
In venovenous ECMO, a machine oxygenates a patient's blood outside the body, but some cleaned blood can loop back into the drainage line, wasting effort. This looping, called recirculation, may depend on how the two cannulas are placed. The authors review 24 patients treated at one center between 2018 and 2025. All use a multistage drainage cannula with a single-stage return, in femoro-jugular or femoro-femoral layouts, and local practice overlaps the tubes in the first layout.
Using a saturation-based formula and chest X-rays to measure tube separation, they find recirculation slightly lower with the femoro-jugular layout, though not significantly. Recirculation shows no clear link to blood flow rate or tip position, and clinical outcomes do not differ clearly between layouts. The authors note little work exists on deliberate overlap with large modern drainage devices and call for a prospective study with sharper tools.
Catalog record
| CREATOR | Elliott T Worku, Michael G Pittard, Richard J Totaro |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 43 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |