What question did this study set out to answer?

To evaluate trans-extracorporeal membrane oxygenation thermodilution (TET) for quantifying recirculation, identifying its physiological drivers, and noninvasively estimating mixed venous oxygenation during V-V ECMO.

March 26, 2026Anesthesiology

Recirculation quantified by Trans-ECMO thermodilution to predict mixed venous oxygenation during V-V ECMO: an in vivo porcine study

Q: What is the clinical evidence from this study?

Population: Acute respiratory distress syndrome on V-V ECMO (n=8). Intervention: Trans-extracorporeal membrane oxygenation thermodilution (TET). Primary outcome: Recirculation and mixed venous oxygenation.

View Full Paper

Ask AI

Bookmark

Key result

Trans-ECMO thermodilution non-invasively estimates mixed venous oxygenation during V-V ECMO without a pulmonary artery catheter.

Why the study?

Increasing blood flow during V-V ECMO does not always improve oxygenation due to the relationship between ECSF and recirculation, requiring methods to predict mixed venous oxygenation.

Does trans-extracorporeal membrane oxygenation thermodilution (TET) accurately quantify recirculation and estimate mixed venous oxygenation during V-V ECMO in a porcine model?

Key Points

To evaluate trans-extracorporeal membrane oxygenation thermodilution (TET) for quantifying recirculation, identifying its physiological drivers, and noninvasively estimating mixed venous oxygenation during V-V ECMO.
Conducted a 24-hour study in 8 anesthetized pigs (65 ± 3 kg) with ARDS induced by oleic acid (n = 4) or hydrochloric acid (n = 4) on femoral-jugular V-V ECMO.
Performed trans-ECMO thermodilution via cold saline boluses downstream of the membrane lung to calculate recirculation from temperature-time curves, deriving mixed venous oxygenation via mass transfer equations.
Median recirculation was 7.4% [IQR 1.1 to 22.0%], measuring less than 10% in 55% of measurements and 27.4% [IQR 15.0 to 43.5%] in the remaining significant recirculation events.
The ratio of extracorporeal blood flow to cardiac output was the sole physiologic factor correlated with recirculation (overall r = 0.67; r = 0.81 during significant recirculation), whereas cannula tip distance showed no significant association (P = 0.74).
Noninvasive estimation of mixed venous oxygenation was highly accurate, yielding r = 0.98 (bias +0.48 ml/100 ml) for oxygen content and r = 0.98 (bias +4%) for oxygen saturation.

Structured PICO

Does trans-extracorporeal membrane oxygenation thermodilution (TET) accurately quantify recirculation and estimate mixed venous oxygenation during V-V ECMO in a porcine model?

Population

8 pigs with induced acute respiratory distress syndrome undergoing femoral-jugular V-V ECMO for 24 hours.

Intervention

Trans-extracorporeal membrane oxygenation thermodilution (TET) performed by injecting a bolus of cold saline downstream the membrane lung.

Outcome

Quantification of recirculation and noninvasive estimation of mixed venous oxygenationsurrogate

Trans-ECMO thermodilution is a promising technique to quantify recirculation and accurately estimate mixed venous oxygenation noninvasively during V-V ECMO.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Supports non-invasive mixed venous oxygenation monitoring during VV-ECMO; hypothesis-generating in porcine model and should not yet change practice.

Cite This Study

Busana et al. (2026) studied Acute respiratory distress syndrome on V-V ECMO (n=8). Trans-extracorporeal membrane oxygenation thermodilution (TET) was evaluated on Recirculation and mixed venous oxygenation. Trans-ECMO thermodilution accurately quantified recirculation and allowed highly accurate noninvasive estimation of mixed venous oxygen saturation (r = 0.98) during V-V ECMO.

synapsesocial.com/papers/69c4cd65fdc3bde448919a1a https://doi.org/10.1097/aln.0000000000006032

View Full Paper

Ask AI

Bookmark

Implication

Supports non-invasive mixed venous oxygenation monitoring during VV-ECMO; hypothesis-generating in porcine model and should not yet change practice.

Recirculation quantified by Trans-ECMO thermodilution to predict mixed venous oxygenation during V-V ECMO: an in vivo porcine study

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Recirculation quantified by Trans-ECMO thermodilution to predict mixed venous oxygenation during V-V ECMO: an in vivo porcine study

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Also Consider