Automatic bellows refill

Details Automatic bellows refill Automatic bellows refill

1997-09-26

1999-01-12

Asher, Kimberly L.

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

12820312, 12820428, 12820513, 12820515, A61M 1610, A61M 1500, A62B 704, F16K 3126

Patent

active

058574581

ABSTRACT:
A system for automatically refilling the patient breathing circuit of an anesthesia system wherein the system detects the existence of a large leak in the patient breathing system and reduces the flow of the fresh gas to the patient circuit to minimize the amount of gas that is vented to the atmosphere. As the leak is corrected, the system automatically detects that the leak has been alleviated and increases the fresh gas flow to a high flow to refill the patient breathing circuit in a rapid time. Upon refill, the system detects that the circuit and the system has been refilled and automatically reduces the fresh gas flow back to a lower level desired by the clinician to maintain the anesthesia. The fresh gas flow used to refill the patient circuit is the same composition of gases and anesthetic agent as initially set by the clinician.

REFERENCES:
patent: 3831595 (1974-08-01), Valenta et al.
patent: 3903881 (1975-09-01), Weigl
patent: 4127121 (1978-11-01), Westenskow et al.
patent: 5398675 (1995-03-01), Henkin et al.
patent: 5662099 (1997-09-01), Tobia et al.
patent: 5678540 (1997-10-01), Kock et al.

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