Indirect calorimeter for medical applications

A - Human Necessities – 61 – B

Patent

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Details

A61B 5/02 (2006.01) A61B 5/00 (2006.01) A61B 5/044 (2006.01) A61B 5/053 (2006.01) A61B 5/08 (2006.01) A61B 5/083 (2006.01) A61B 5/087 (2006.01) A61B 5/091 (2006.01) A61B 5/11 (2006.01) A61M 15/00 (2006.01) A61M 16/00 (2006.01) A62B 7/00 (2006.01) A62B 9/00 (2006.01) F16K 31/02 (2006.01) G01N 33/497 (2006.01) A61B 5/022 (2006.01) A61B 5/024 (2006.01) A61B 7/00 (2006.01)

Patent

CA 2398949

An improved respiratory analyzer (20) comprises a disposable flow module (30) and non-disposable electronics module (32). An improved ventilator system (10) comprises a supply of respiratory gases, a ventilator line (16) for directing the respiratory gases to a patient, a flow module holder located in series with the ventilator line into which a flow module can be inserted, and an electronics module which connects to the flow module. In a preferred embodiment, the flow module and electronics module operate in combination to provide the functionality of an indirect calorimeter, so as to determine the metabolic rate of the patient. Feeding of an intubated patient can be controlled using determined patient metabolic rates. Other respiratory parameters can be determined by the system, such as a peak flow, tidal volume, end-tidal concentrations, and respiratory quotient. The system provides a non- invasive method of cardiac output determination. A flow module can also be inserted into the mouth or internal respiratory tube of a person.

L'invention concerne un analyseur respiratoire am~lior~ comprenant un module d'~coulement jetable et un bo¹tier ~lectronique non jetable. Un respirateur comprend une alimentation en gaz respiratoires; une ligne de respirateur permettant d'acheminer les gaz respiratoires vers le patient; un support de module d'~coulement dispos~ en s~rie avec la ligne de respirateur et dans lequel un module d'~coulement peut Útre ins~r~; et un bo¹tier ~lectronique reli~ au module d'~coulement. Dans un mode de r~alisation pr~f~rentiel, le module d'~coulement et le bo¹tier ~lectronique fonctionnent en combinaison afin de reproduire les fonctions d'un calorim­tre indirect pour d~terminer la vitesse de m~tabolisme du patient. L'alimentation d'un patient intub~ peut Útre command~e ~ l'aide des vitesses de m~tabolisme du patient qui ont ~t~ pr~d~termin~es. D'autres param­tres respiratoires peuvent Útre mesur~s par le dispositif, tel que le d~bit de pointe, le volume respiratoire, les concentrations en fin d'expiration, et le quotient respiratoire. Le dispositif permet de proc~der de mani­re non effractive ~ la mesure du d~bit cardiaque. Un module d'~coulement peut ~galement Útre introduit dans la bouche ou dans le tube respiratoire interne d'une personne.

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