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Device for assessing perfusion failure in a patient by measurement of blood flow

a technology of blood flow and perfusion failure, which is applied in the field of methods and devices for assessing the perfusion failure of patients, can solve the problems of complicated measurement of ph, and achieve the effects of accurately monitoring the condition of patients, easy adaptation, and minimal discomfort or risk to patients

Inactive Publication Date: 2001-09-27
KIMBALL VICTOR E +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] One advantage of the invention is that perfusion can be rapidly assessed in a patient, with measurements being made in just a few seconds.

Problems solved by technology

In addition, measurements of pH may be complicated by the presence of saliva, food, or stomach acids. CO.sub.2 measurements may be affected by ambient CO.sub.2, and, since they depend on equilibration with tissue CO.sub.2 levels, are slow.

Method used

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  • Device for assessing perfusion failure in a patient by measurement of blood flow
  • Device for assessing perfusion failure in a patient by measurement of blood flow
  • Device for assessing perfusion failure in a patient by measurement of blood flow

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Embodiment Construction

[0027] Definitions and Nomenclature:

[0028] Before the present devices, apparatus and methods are disclosed and described, it is to be understood that this invention is not limited to sensor designs, measurement techniques, or the like, as such may vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0029] It must be noted that, as used in the specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise.

[0030] The term "perfusion failure" as used herein is meant a reduction in blood flow associated with maldistribution of blood through the circulatory system and a reduction in blood flow to a less critical tissue(s) and / or organ(s) relative to blood flow in vital (critical) tissues and organs (e.g., the brain and heart). In general, "perfusion failure" is meant td encompass reduction in b...

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Abstract

Methods and devices are provided for assessing impairment of blood circulation in a patient, such as that in perfusion failure, by measurement of blood flow in the gastrointestinal tract or upper respiratory / digestive tract of the patient. The method comprises introducing a blood-flow sensor into the gastrointestinal tract or the upper respiratory / digestive tract of a patient, placing the sensor adjacent a mucosal surface therein, and measuring blood flow in adjacent tissue to determine blood flow in that tissue. The method may also involve measurement of PCO.sub.2 and / or pH in combination with the blood flow determination. The invention affords rapid measurement and detection of perfusion failure.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001] This application is a continuation-in-part of U.S. Ser. No. 09 / 160,224, filed Sep. 24, 1998, which is a continuation-in-part of U.S. Ser. No. 09 / 099,293, filed Jun. 18, 1998, which is a continuation-in-part of U.S. Ser. No. 08 / 939,591, filed Sep. 29, 1997, which is a continuation-in-part of U.S. Ser. No. 08 / 710,208, filed Sep. 13, 1996, abandoned, which is a continuation-in-part of U.S. Ser. No. 08 / 498,932, filed Jul. 6, 1995, which issued Dec. 3, 1996 as U.S. Pat. No. 5,579,763.TECHNICAL FIELD[0002] The present invention relates generally to methods and devices for assessing perfusion failure in a patient. More particularly, the invention relates to assessment of perfusion failure in a patient by measuring blood flow in a mucosal tissue in the body of a patient.BACKGROUND[0003] Very low blood flow, or low "systemic perfusion," is typically due to low aortic pressure and can be caused by a number of factors, including hemorrhage, sepsis ...

Claims

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Application Information

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IPC IPC(8): A61B5/00A61B5/02A61B5/026A61B5/0285A61B5/05A61B5/145A61B8/06
CPCA61B5/0071A61B5/0084A61B5/0261A61B5/14539A61B5/14542A61B5/1473A61B5/412A61B5/42A61B5/682A61B8/06A61B8/12
Inventor KIMBALL, VICTOR E.WEIL, MAX HARRYTANG, WANCHUNBISERA, JOSE
Owner KIMBALL VICTOR E
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