Heated blood pressure cuff device, system and method

Patent metadata

Field	Value
Publication number	US-11793917-B2
Application number	US-201816627162-A
Country	US
Kind code	B2
Filing date	Jun 29, 2018
Priority date	Jun 30, 2017
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A system for increasing blood flow through a user's limb during a blood collection procedure includes an inflatable cuff that is worm around the user's limb. A pump and a deflation valve are in fluid communication with the inflatable cuff. A heating element and a temperature sensor are attached to the inflatable cuff. The system also includes a motion sensor. A controller is in communication with the pump, the deflation valve, the heating element and the temperature and motion sensors and detects a blood pressure or blood flow of the user, controls inflation and deflation of the inflatable cuff and controls energization of the heating element based on data from the motion sensor and the temperature sensor.

First claim

What is claimed is:

1. A system for increasing blood flow through a user's limb during a blood collection procedure comprising:
a. an inflatable cuff configured to be worn around the user's limb;
b. a pump in fluid communication with the inflatable cuff;
c. a deflation valve in fluid communication with the inflatable cuff;
d. a heating element within the inflatable cuff;
e. a motion sensor;
f. a temperature sensor attached to the inflatable cuff; and
g. a controller in communication with the pump, the deflation valve, the heating element and the temperature and motion sensors, said controller configured to detect a blood pressure or blood flow of the user, control inflation and deflation of the inflatable cuff and control energization of the heating element based on data received from a feedback loop provided by the motion sensor and the temperature sensor.

2. The system of claim 1 wherein the pump and the deflation valve are positioned within a device that is controlled by the controller.

3. The system of claim 1 further comprising a power regulator in electrical communication with the heating element and the controller with said controller controlling the power regulator to control energization of the heating element.

4. The system of claim 3 wherein the pump, the deflation valve and the power regulator are positioned within a device that is controlled by the controller.

5. The system of claim 1 wherein the cuff includes a fastening element.

6. A method of increasing blood flow through a user's limb during a blood collection procedure comprising:
a. positioning the user's limb through an inflatable cuff;
b. detecting a blood pressure or blood flow of the user using a motion sensor;
c. warming the user's limb using a heating element positioned in the inflatable cuff so that blood vessels in the user's limb are dilated;
d. detecting a temperature of the user's limb using a temperature sensor;
e. providing a feedback loop to a controller with data collected by the motion sensor and temperature sensor; and
f. controlling energization of the heating element and the inflation of the inflatable cuff based on the detected blood pressure or blood flow and the detected temperature provided by the feedback loop.

7. The method of claim 6 wherein detecting the blood pressure or blood flow of the user using the motion sensor includes inflating the inflatable cuff and deflating the inflatable cuff.

8. The method of claim 6 wherein the user's limb is the user's arm.

9. The method of claim 6 further comprising decreasing power supplied to the heating element when the detected temperature exceeds a predetermined level.

10. The method of claim 6 wherein the blood collection procedure is an apheresis procedure.

Assignees

• Fenwal Inc

Inventors

• Case Brian C
• Stonig Christian

Classifications

• A61M1/3639 Primary

  Blood pressure control, pressure transducers specially adapted therefor · CPC title

• A61B5/02233

  Occluders specially adapted therefor (tourniquets A61B17/132) · CPC title

• A61M1/3496

  Plasmapheresis; Leucopheresis; Lymphopheresis (A61M1/3472 takes precedence) · CPC title

• A61M2205/3327

  Measuring · CPC title

• A61M2205/3334

  Measuring or controlling the flow rate · CPC title