Device for Assessing Perfusion Failure in a Patient by Measurement of Blood Flow
First Claim
1. A device for assessing the degree of systemic perfusion in a patient, the device comprising:
- a. a surface perfusion pressure monitor for measuring the surface perfusion pressure of a patient; and
b. a blood pressure monitor for measuring the blood pressure of the patient;
wherein an index is derived from the surface perfusion pressure measurement and the blood pressure measurement to assess the degree of systemic perfusion of the patient.
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Accused Products
Abstract
A device is provided for assessing impairment of blood circulation in a patient, such as that in perfusion failure, by measurement of blood flow adjacent a mucosal surface accessible by a mouth or nose and connecting with the gastrointestinal tract or upper respiratory/digestive tract of a patient. The device includes a blood-flow sensor adapted to be positioned adjacent a mucosal surface with a patient'"'"'s body and measuring blood flow in adjacent tissue and a PCO.sub.2 sensor adapted to be positioned adjacent the mucosal surface and measuring PCO.sub.2. In addition a pH sensor may be used in combination with the blood flow determination. A method of detecting perfusion failure is also disclosed. The method includes utilizing blood-flow measurements in conjunction with a surface perfusion pressure index and/or an optical plethysmography index to more accurately assess perfusion failure. These measurements may also be supplement by taking measurements of pH, sublingual PCO.sub.2, and Sa O.sub.2. The invention affords rapid measurement and detection of perfusion failure.
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Citations
14 Claims
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1. A device for assessing the degree of systemic perfusion in a patient, the device comprising:
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a. a surface perfusion pressure monitor for measuring the surface perfusion pressure of a patient; and
b. a blood pressure monitor for measuring the blood pressure of the patient;
wherein an index is derived from the surface perfusion pressure measurement and the blood pressure measurement to assess the degree of systemic perfusion of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for assessing the degree of systemic perfusion in a patient comprising the steps of (i) measuring the surface perfusion pressure in the patient by utilizing a surface perfusion pressure monitor;
- (ii) measuring blood pressure in the patient;
(iii) calculating an index derived from the surface perfusion pressure measurement and the blood pressure measurement; and
(iv) assessing the degree of systemic perfusion of the patient. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- (ii) measuring blood pressure in the patient;
Specification