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Automatic modules for extracorporeal circulation control.

N Chauveau¹, W Van Meurs, R Barthelemy

¹INSERM U305, Hôtel Dieu, Toulouse, France.

The International Journal of Artificial Organs

|October 1, 1990

Summary

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Maintaining a constant oxygenator level during extracorporeal circulation (ECC) is crucial. This study introduces automated devices for pump speed regulation and venous return control, enhancing ECC safety and efficiency.

Area of Science:

Biomedical Engineering
Medical Devices
Cardiovascular Surgery

Background:

Extracorporeal circulation (ECC) requires precise control of oxygenator levels.
Uncontrolled venous return can lead to complications during ECC.

Purpose of the Study:

To develop and evaluate automated devices for regulating oxygenator levels and venous return during ECC.
To improve the safety and reproducibility of ECC procedures.

Main Methods:

A level regulator device was designed to control pump speed based on oxygenator level.
An automatic clamp was developed to manage venous return.
Linearization of the level sensor optimized the PI regulator.
Simulations and clinical evaluations were performed.

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Main Results:

The level regulator effectively controlled pump speed and stopped the pump at low levels.
The automatic clamp facilitated reproducible venous return transitions.
Automated pump speed adjustment during ECC initiation and cessation was demonstrated.
The developed modules form part of an evolutive ECC automation system.

Conclusions:

The proposed devices offer a robust solution for oxygenator level and venous return management during ECC.
These modules contribute to the automation of extracorporeal circulation.
The system enhances safety and ease of use in surgical procedures involving ECC.