Apparatus and method for continuous monitoring of tissue carbon dioxide and pH using capnometric recirculating gas tonom
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-005/00
출원번호
US-0390406
(1995-02-16)
발명자
/ 주소
Kruse James Alexander
Guzman Jorge Alberto
출원인 / 주소
Wayne State University
대리인 / 주소
Brooks & Kushman P.C.
인용정보
피인용 횟수 :
18인용 특허 :
5
초록▼
A tonometry catheter apparatus comprising an elongate flexible tube having a proximal extracorporeal end and a distal interacorporeal end. The distal end of the tube has a distensible, gas-permeable tonometry vessel, the vessel and the distal end defining therebetween a space which may be filled wit
A tonometry catheter apparatus comprising an elongate flexible tube having a proximal extracorporeal end and a distal interacorporeal end. The distal end of the tube has a distensible, gas-permeable tonometry vessel, the vessel and the distal end defining therebetween a space which may be filled with a gas. An in-flow orifice lies in communication with the space, through which gas may enter the vessel. An in-flow lumen with a distal end and a proximal end is also provided, the distal end being in communication with the in-flow orifice. An out-flow orifice lies in communication with the space, through which the gas may exit the vessel. An out-flow lumen is disposed with a distal end and a proximal end, the distal end being in communication with the out-flow orifice. The proximal end of the tube has a pump for propelling gas into the vessel. A capnometer and a sensor quantify the level of carbon dioxide (CO.sub.2) gas exiting the vessel. A hollow connecting member defines with the vessel, the in-flow lumen and the out-flow lumen a closed path through which the gas may continuously recirculate.
대표청구항▼
[ We claim:] [1.] A tonometry catheter apparatus comprising:an elongate flexible tube having a proximal extracorporeal end and a distal intracorporeal end; distal end of the tube havinga distensible, inflatable, gas-permeable tonometry vessel, the vessel and the distal end defining therebetween a sp
[ We claim:] [1.] A tonometry catheter apparatus comprising:an elongate flexible tube having a proximal extracorporeal end and a distal intracorporeal end; distal end of the tube havinga distensible, inflatable, gas-permeable tonometry vessel, the vessel and the distal end defining therebetween a space which is filled with a gas,an in-flow orifice in communication with the space, through which gas may enter the vessel,an in-flow lumen with a distal end and a proximal end, the distal end being in communication with the in-flow orifice,an out-flow orifice in communication with the space, through which the gas may exit the vessel, andan out-flow lumen with a distal end and a proximal end, the distal end being in communication with the out-flow orifice, proximal end of the tube havingmeans for propelling gas into the vessel, the propelling means being selected from a group consisting of a peristaltic pump, a roller pump, an impeller pump, a blower, a propeller, a fan, a circulator, and their equivalents, andmeans for continuously quantifying the level of carbon dioxide (CO.sub.2) gas exiting the vessel, anda hollow connecting member linking the propelling and quantifying means to define with the vessel, the in-flow lumen and the out-flow lumen a closed path through which the gas may continuously recirculate under a relatively constant pressure, thereby resulting in a substantially error-free, stable reading.
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이 특허에 인용된 특허 (5)
Salzman Andrew L. (Wayland MA) Fink Mitchell P. (Dover MA) Kane Jeffrey B. (Boston MA), Air tonometry method and apparatus for measuring intraluminal gastrointestinal pCO2and pO2.
Engelhardt Harald (Aachen DEX) Rau Guenter (Aachen DEX) Reul Helmut (Dueren DEX), Apparatus for the determination of the partial pressure of gases dissolved in a fluid.
LaPlante, Paulita M.; Bartnik, Daniel J.; Griffith, Rose A., Method and system for assessing severity and stage of peripheral arterial disease and lower extremity wounds using angiosome mapping.
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