Method and System of Measuring Blood Circulation Velocity

• US 20070123785A1
• Filed: 11/27/2006
• Published: 05/31/2007
• Est. Priority Date: 11/28/2005
• Status: Abandoned Application

• Current Assignee: Zen-U Biotechnology Co., Ltd
• Original Assignee: Zen-U Biotechnology Co., Ltd
• Inventors: Lu, Chih-Yi, Lu, Hsueh-Kuan
• Application Number:
  US11/563,678
• Publication Number:
  US 20070123785A1
• Time in Patent Office: Days
• US Class Current: 600/504
• CPC Class Codes: A61B 5/02 Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06

Abstract

A system and method of measuring blood circulation velocity includes the steps of keeping a person measured by a blood oxygen saturation analytical instrument and served by a ventilator; setting an initial time point, providing a first gas to the person via the ventilator, and starting to record a blood oxygen saturation value per predict time interval; providing a second gas to the person at a first time point; providing a third gas to the person at a second time point; stopping recording the blood oxygen saturation value at a terminal time point; setting a reference time point according to the blood oxygen saturation value which has a variation according to the records; obtaining the person'"'"'s blood circulation velocity, which is proportional to the reciprocal of the difference of the reference time point and the first time point.

Claims

1. A method of measuring blood circulation velocity comprising the steps of:

keeping a person measured by a blood oxygen saturation analytical instrument and served by a ventilator;

setting an initial time point, providing a first gas to the person via the ventilator, and starting to record a blood oxygen saturation value per predict time interval;

providing a second gas to the person at a first time point;

providing a third gas to the person at a second time point;

stopping recording the blood oxygen saturation value at a terminal time point;

setting a reference time point according to the blood oxygen saturation value which has a variation according to the records; and

obtaining the person'"'"'s blood circulation velocity, which is proportional to the reciprocal of the difference of the reference time point and the first time point.

2. The method as claimed in claim 1, wherein the first gas is different to the second gas.

3. The method as claimed in claim 2, wherein the first gas is selected from the group of oxygen, air, and the combination of oxygen and air.

4. The method as claimed in claim 2, wherein the second gas is selected form the group of carbon monoxide (CO), nitrogen (N2), carbon dioxide (CO2), the gas without oxygen, or the combination thereof.

5. The method as claimed in claim 1, wherein the first gas is the same as the third gas.

6. The method as claimed in claim 1, wherein the blood circulation velocity of the person to be measured is obtained by using a reference distance dividing the difference of the reference time point and the first time point.

7. The method as claimed in claim 6, wherein the reference distance is proportional to a height of the person to be measured.

8. The method as claimed in claim 1, wherein a blood circulation velocity reference value is the reciprocal of the difference of the reference time point minus the first time point, and the blood circulation velocity is obtained by comparing the blood circulation velocity reference to a curve diagram of relative variables relative to blood circulation velocity.

9. The method as claimed in claim 1, wherein when the initial time point is at zero second, the first, the second and the terminal time point are at about 20th second, 40th second and 90th second.

10. The method as claimed in claim 4, wherein when the second gas is carbon monoxide and the initial time point is at zero second, the second time point are at about 25th second.

11. The method as claimed in claim 1, wherein the blood oxygen saturation analytical instrument is not an intrusive type.

12. The method as claimed in claim 1, wherein the record of the blood oxygen saturation value is invalid if the blood oxygen saturation value at the first time point is different to that at the initial time point.

13. A system of measuring blood circulation velocity, comprising:

a main controller;

a blood oxygen saturation analytical instrument electrically connecting with the main controller for detecting the blood oxygen saturation value of the person to be measured per predict time interval and transmitting the blood oxygen saturation value to the main controller;

a ventilator providing a predetermined gas to the person per predict time interval; and

a data output unit electrically connecting with the main controller for receiving the data transmitted from the main controller and outputting the data.

14. The system as claimed in claim 13, wherein the ventilator receives an instruction and then provides a predetermined gas to the person to be measured per predict time interval.

15. The system as claimed in claim 14, wherein the ventilator is electrically connecting with the main controller, and the instruction is emitted by the main controller.

16. The system as claimed in claim 14, wherein the instruction is inputted into the ventilator by manual work.

17. The system as claimed in claim 13, wherein the data output unit outputs a curve of the blood oxygen saturation value corresponding to the predict time point.

18. The system as claimed in claim 13, wherein the blood oxygen saturation analytical instrument is not an intrusive type.