Method and device for assessing perfusion failure in a patient by measurement of blood flow
First Claim
1. A method for assessing systemic perfusion failure of a patient, the method comprising:
- placing a blood-flow sensor adjacent a sublingual mucosal surface within the body of a patient; and
measuring blood flow in an adjacent tissue;
wherein a measured blood flow in the adjacent tissue that is substantially lower than a normal blood flow is indicative of systemic perfusion failure in the patient.
4 Assignments
0 Petitions
Accused Products
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 PCO2 and/or pH in combination with the blood flow determination. The invention affords rapid measurement and detection of perfusion failure.
72 Citations
15 Claims
-
1. A method for assessing systemic perfusion failure of a patient, the method comprising:
-
placing a blood-flow sensor adjacent a sublingual mucosal surface within the body of a patient; and
measuring blood flow in an adjacent tissue;
wherein a measured blood flow in the adjacent tissue that is substantially lower than a normal blood flow is indicative of systemic perfusion failure in the patient.
-
-
2. A method for assessing perfusion failure of a patient, the method comprising:
- placing a blood-flow sensor adjacent a mucosal surface within the body of a patient;
placing a PCO2 sensor adjacent a mucosal surface within the body of a patient, measuring blood flow in adjacent tissue using the blood-flow sensor; and
measuring PCO2 with the PCO2 sensor,wherein a measured blood flow that is substantially lower than a normal blood flow and a PCO2 that is substantially higher than a normal PCO2 are indicative of perfusion failure in the patient. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
positioning a blood-flow sensor means adjacent the mucosal tissue; and
measuring a rate-of-change of blood flow in the mucosal tissue whereby the rate-of-change indicates whether blood flow is decreasing, and whereby a decreasing blood flow indicates a worsening condition in a patient.
- placing a blood-flow sensor adjacent a mucosal surface within the body of a patient;
-
14. A method for assessing perfusion failure of a patient, the method comprising:
-
placing a blood-flow sensor adjacent a mucosal surface within the body of a patient;
placing a pH sensor adjacent a mucosal surface within the body of a patient;
measuring blood flow in adjacent tissue using the blood-flow sensor; and
measuring pH with the pH sensor, wherein a measured blood flow that is substantially lower than a normal blood flow and a pH that is substantially lower than a normal pH are indicative of perfusion failure in the patient.
-
-
15. A method for assessing perfusion failure of a patient, the method comprising:
-
placing a blood-flow sensor adjacent a mucosal surface within the body of a patient;
placing a PCO2 sensor adjacent a mucosal surface within the body of a patient;
measuring blood flow in adjacent tissue using the blood-flow sensor;
placing a pH sensor adjacent a mucosal surface within the body of a patient;
measuring PCO2 with the PCO2 sensor, and measuring pH with the pH sensor, wherein a measured blood flow that is substantially lower than a normal blood flow, a PCO2 that is substantially higher than a normal PCO2 and a pH that is substantially lower than a normal pH are indicative of perfusion failure in the patient.
-
Specification