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Pneumatic driven pulsatile ECMO in vitro evaluation with oxygen tanks.

Changyoung Yoo1, Seongmin Kang2, Seong-Wook Choi1,2

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Summary

A new mobile pulsatile extracorporeal membrane oxygenation (ECMO) device uses an oxygen tank for power, offering improved blood flow and oxygenation. This portable system shows promise for patients with cardiopulmonary dysfunction, even during transport.

Keywords:
Extracorporeal membrane oxygenationMock circuitPneumatic pumpPulsatile flow

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Area of Science:

  • Biomedical Engineering
  • Cardiovascular Technology
  • Medical Devices

Background:

  • Current venoarterial extracorporeal membrane oxygenation (ECMO) systems have limitations, including low patient survival rates.
  • Left ventricular dilation is a significant cause of mortality in patients undergoing ECMO.
  • There is a critical need for innovative ECMO treatments to improve patient outcomes.

Purpose of the Study:

  • To introduce a novel mobile pulsatile ECMO system.
  • To evaluate the system's ability to provide pulsatile blood flow and oxygenation using an oxygen tank as a power source.
  • To assess the system's efficacy under simulated patient conditions.

Main Methods:

  • Development of a mobile pulsatile ECMO device with a unique pump structure powered by an oxygen tank.
  • In vitro experiments utilizing a mock circulation system simulating patient physiological conditions.
  • Evaluation of blood flow rate, duration, and pulsatile characteristics using an energy equivalent pressure index.

Main Results:

  • The mobile pulsatile ECMO successfully sustained 1 L/min pulsatile blood flow for extended periods (53 min with a 2.8 L tank, 85 min with a 4.6 L tank).
  • The system demonstrated sufficient pulsatile blood flow delivery compared to existing ECMO devices.
  • In vitro testing confirmed the system's capability to provide adequate oxygen and pulsatile flow using oxygen tank pressure.

Conclusions:

  • The proposed mobile pulsatile ECMO system offers a viable solution for patients with impaired cardiopulmonary function.
  • The oxygen tank-powered design enhances portability and functionality, particularly during patient transport.
  • This innovative ECMO device has the potential to improve survival rates by mitigating risks like left ventricular dilation.