US 7,726,311 B2 · Method and apparatus for conducting total liquid ventilation with control of residual volume and ventilation cycle profile

Abstract

A method of applying total liquid ventilation to a patient according to a ventilation cycle including inspiration and expiration profiles, comprises supplying oxygenated liquid to the patient's lungs, withdrawing liquid from the patient's lungs, and controlling independently supply of oxygenated liquid to the patient's lungs and withdrawal of liquid from the patient's lungs. This supply and withdrawal independent control comprises producing a ventilation cycle having independently controlled inspiration and expiration profiles. To carry out the method, a total liquid ventilator system comprises an inspiration pump for supplying oxygenated liquid to the patient's lungs, and an expiration pump for withdrawing liquid from the patient's lungs. A ventilation cycle control comprises first and second pump controllers connected to the inspiration and expiration pumps, respectively, to produce a ventilation cycle having independently controlled inspiration and expiration profiles.

Claims10

Dependent claims

A method of applying total liquid ventilation to a patient according to a ventilation cycle including inspiration and expiration profiles, comprising:

supplying oxygenated liquid to the lungs of the patient during inspiration, wherein supplying oxygenated liquid to the patient's lungs comprises accumulating oxygenated liquid from an oxygenator unit in an inspiration piston pump during expiration, and transferring the oxygenated liquid accumulated in the inspiration piston pump to the patient's lungs during inspiration;
withdrawing liquid from the patient's lungs during expiration, wherein withdrawing liquid from the patient's lungs comprises accumulating liquid from the patient's lungs in an expiration piston pump during expiration, and transferring the liquid accumulated in the expiration piston pump directly to the oxygenator unit during inspiration;
and
controlling independently supply of oxygenated liquid to the patient's lungs and withdrawal of liquid from the patient's lungs, the supply and withdrawal independent control comprising producing a ventilation cycle having independently controlled inspiration and expiration profiles.

1 more element

A system for applying total liquid ventilation to a patient according to a ventilation cycle including inspiration and expiration profiles, comprising:

an inspiration pump for supplying oxygenated liquid to the lungs of the patient, wherein the inspiration pump comprises an inspiration piston pump for accumulating oxygenated liquid from the oxygenator during expiration, and for subsequently transferring the accumulated oxygenated liquid to the patient's lungs during inspiration;
and
an expiration pump for withdrawing liquid from the patient's lungs, wherein the expiration pump comprises an expiration piston pump for accumulating liquid from the patient's lungs during expiration, and for subsequently transferring the liquid accumulated from the patient's lungs directly to the oxygenator during inspiration;
and
a ventilation cycle control means comprising first and second pump controllers connected to the inspiration and expiration pumps, respectively, to control independently said inspiration and expiration pumps in order to produce a ventilation cycle having independently controlled inspiration and expiration profiles.

2 more elements

Dependencies are inferred from the claim text.

Method and apparatus for conducting total liquid ventilation with control of residual volume and ventilation cycle profile

Life of this patent

Method and apparatus for conducting total liquid ventilation with control of residual volume and ventilation cycle profile

Life of this patent

Abstract

Claims10