Anesthesia device and method of controlling hydrogen concentration in a hydrogen-containing anesthesia gas

Patent metadata

Field	Value
Publication number	US-2017368293-A1
Application number	US-201615544348-A
Country	US
Kind code	A1
Filing date	Jan 19, 2016
Priority date	Jan 21, 2015
Publication date	Dec 28, 2017
Grant date	—

Abstract

An anesthesia device configured to measure the hydrogen concentration in an anesthesia gas containing a hydrogen gas includes: an anesthesia gas preparation circuit configured to generate anesthesia gas by mixing an air or an oxygen mixture air with a vaporized anesthetic; a closed circuit-type or semi-closed circuit-type respiratory circuit including a gas circulation passage configured to circulate the hydrogen-containing anesthesia gas containing the hydrogen gas and the vaporized anesthetic; and a hydrogen concentration measurement circuit configured to measure the hydrogen concentration in the hydrogen-containing anesthesia gas in the gas circulation passage, wherein the hydrogen concentration measurement circuit includes: an anesthetic removing member having a removability of the vaporized anesthetic in the hydrogen-containing anesthesia gas; and a hydrogen concentration measuring instrument provided on the secondary side of the anesthetic removing member.

First claim

1 . An anesthesia device comprising:
an anesthesia gas preparation circuit configured to generate an anesthesia gas by mixing an air or an oxygen mixture air with a vaporized anesthetic; a closed circuit-type or semi-closed circuit-type respiratory circuit comprising: a gas circulation passage configured to circulate a hydrogen-containing anesthesia gas comprising a hydrogen gas and the anesthesia gas; and an interface provided on the gas circulation passage and configured to supply the hydrogen-containing anesthesia gas and recover an exhaled air; a hydrogen concentration measurement circuit configured to measure a hydrogen concentration in the hydrogen-containing anesthesia gas in the gas circulation passage; a gas supply passage provided over the anesthesia gas preparation circuit and the respiratory circuit, and configured to supply the hydrogen-containing anesthesia gas to the respiratory circuit; and an analytical gas-collecting passage provided over the respiratory circuit and the hydrogen concentration measurement circuit, wherein the hydrogen concentration measurement circuit comprises: an anesthetic removing member having a removability of the vaporized anesthetic in the hydrogen-containing anesthesia gas collected from the analytical gas-collecting passage; and a hydrogen concentration measuring instrument provided on a secondary side of the anesthetic removing member.

2 . The anesthesia device according to claim 1 , further comprising:
a hydrogen-containing gas supply circuit configured to supply the hydrogen-containing gas; and a hydrogen-containing gas supply passage configured to supply the hydrogen-containing gas from the hydrogen-containing gas supply circuit, wherein the hydrogen-containing gas supply passage is connected with the gas supply passage between the anesthesia gas preparation circuit and the respiratory circuit.

3 . The anesthesia device according to claim 2 , further comprising a control unit configured to control a supply quantity of the hydrogen-containing gas from the hydrogen-containing gas supply circuit based on a measurement value of the hydrogen concentration measured in the hydrogen concentration measurement circuit.

4 . The anesthesia device according to claim 1 , wherein the vaporized anesthetic is a halogen-based anesthetic.

5 . The anesthesia device according to claim 1 , wherein the anesthetic removing member is a solid adsorbent.

6 . A method of controlling a hydrogen concentration in a hydrogen-containing anesthesia gas, comprising: collecting a portion of the hydrogen-containing anesthesia gas comprising a hydrogen gas and a vaporized anesthetic in a closed circuit-type or semi-closed circuit-type respiratory circuit; removing the vaporized anesthetic therefrom; and then measuring the hydrogen concentration in the hydrogen-containing anesthesia gas.

7 . An anesthesia apparatus mountable kit configured to be mountable on an anesthesia apparatus to supply a hydrogen-containing anesthesia gas in a gas circulation passage and to control a hydrogen concentration in the hydrogen-containing anesthesia gas, the anesthesia apparatus comprising: an anesthesia gas preparation circuit configured to generate an anesthesia gas by mixing an air or an oxygen mixture air with a vaporized anesthetic; a closed circuit-type or semi-closed circuit-type respiratory circuit comprising: the gas circulation passage configured to circulate the anesthesia gas; and an interface provided on the gas circulation passage and configured to supply the anesthesia gas and recover an exhaled air; and a gas supply passage provided over the anesthesia gas preparation circuit and the respiratory circuit, and the anesthesia apparatus mountable kit comprising:
a hydrogen-containing gas supply circuit configured to supply the hydrogen-containing gas; a hydrogen-containing gas supply passage configured to connect the hydrogen-containing gas supply circuit with the gas supply passage; an analytical gas-collecting passage configured to collect a gas circulating in the gas circulation passage; a hydrogen concentration measurement circuit configured to measure the hydrogen concentration in the gas collected; and a control unit configured to control a supply quantity of the hydrogen-containing gas from the hydrogen-containing gas supply circuit based on a measurement value of the hydrogen concentration measured; wherein the hydrogen concentration measurement circuit comprises: an anesthetic removing member having a removability of the vaporized anesthetic from the gas collected; and a hydrogen concentration measuring instrument provided on a secondary side of the anesthetic removing member.

8 . A veterinary anesthesia device comprising:
an anesthesia gas preparation circuit configured to generate an anesthesia gas by mixing an air or an oxygen mixture air with a vaporized anesthetic; a case configured to accommodate an experimental animal; a hydrogen concentration measurement circuit configured to measure a hydrogen concentration in a hydrogen-containing anesthesia gas comprising a hydrogen gas and the anesthesia gas in the case; a gas supply passage provided over the anesthesia gas preparation circuit and the case and configured to supply the hydrogen-containing anesthesia gas to the case; and an analytical gas-collecting passage provided over the case and the hydrogen concentration measurement circuit, wherein the hydrogen concentration measurement circuit comprises: an anesthetic removing member having a removability of the vaporized anesthetic in the hydrogen-containing anesthesia gas collected from the analytical gas-collecting passage; and a hydrogen concentration measuring instrument provided on a secondary side of the anesthetic removing member.

Assignees

• Taiyo Nippon Sanso Corp

Inventors

• Nishiwaki Yoshiki
• Kazama Tomiei
• Satoh Yasushi

Classifications

• A61M16/0891

  Closed circuit, e.g. for anaesthesia · CPC title

• A61K31/08

  acyclic, e.g. paraformaldehyde · CPC title

• A61M16/18

  Vaporising devices for anaesthetic preparations · CPC title

• A61M2016/0039

  in the inspiratory circuit · CPC title

• A61M2202/0241

  Anaesthetics; Analgesics · CPC title