Sensor unit and method for sensing a blood related parameter and system including such a sensor unit

• US 20050131305A1
• Filed: 05/14/2003
• Published: 06/16/2005
• Est. Priority Date: 05/17/2002
• Status: Abandoned Application

• Current Assignee: Gambro Lundia AB (Baxter International Inc.)
• Original Assignee: Gambro Lundia AB (Baxter International Inc.)
• Inventors: Danielson, Bo G, Persson, Dick
• Application Number:
  US10/514,635
• Publication Number:
  US 20050131305A1
• Time in Patent Office: Days
• US Class Current: 600/481
• CPC Class Codes: A61B 5/0008 Temperature signals
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/6865 Access ports
• CPC Class Codes: A61B 5/6876 Blood vessel
• CPC Class Codes: A61B 5/6884 Clamps or clips
• CPC Class Codes: A61M 2039/0258 for vascular access, e.g. blood stream access
• CPC Class Codes: A61M 2039/0267 comprising sensors or electrical contacts
• CPC Class Codes: A61M 2230/20 Blood composition characteristics
• CPC Class Codes: A61M 39/0247 Semi-permanent or permanent transcutaneous or percutaneous access sites to the inside of the body peritoneal dialysis catheters A61M1/285; tracheostomy devices A61M16/0465; measuring pressure within the body A61B5/03; colostomy devices A61F5/445; gastrotomy feeding tubes A61J15/0015; means for fixing a feeding tube outside of the body A61J15/0053

Abstract

A sensor unit (5) and a method for sensing a blood related parameter in a bloodstream of a human or an animal, including sensing the blood related parameter(s) in a channel (7) of a lid member for a main body of a bloodstream access device (1) which channel allows a continuous blood flow passing between an artery side and a vein side of the bloodstream access device (1). The invention also concerns a method for monitoring the function of a bloodstream access device and a blood parameter sensor system.

Claims

1. Sensor unit including at least one sensor element for sensing a blood related parameter in a bloodstream of a human or an animal, characterized in

that the sensor unit includes a lid member for a main body of a bloodstream access device which includes connecting elements for connection to an artery and a vein of the human or the animal,

that the sensor unit comprises a channel for allowing a continuous blood flow passing between an artery side and a vein side of the bloodstream access device, and

that the sensor element(s) is (are) positioned for sensing the blood related parameter(s) in the channel.

2. Sensor unit according to claim 1, characterized in that it includes a parameter level indicator.

3. Sensor unit according to claim 1, characterized in that it includes means for transmitting parameter related signals to an external receiver.

4. Sensor unit according to claim 1, characterized in that the sensor element is a liquid crystal sensor.

5. Sensor unit according to claim 1, characterized in that the sensor element is a sensor for one parameter in the group:

blood temperature, blood flow, blood-pressure, level of biochemical substances such as glucose, insulin, urea.

7. Blood parameter sensor system, characterized in that it includes a bloodstream access device and a sensor unit according to claim 1.

8. System according to claim 7, characterized in that it includes a feed-back device for administration of a substance into the human or the animal as a response to a sensed parameter level.

9. System according to claim 8, characterized in that the feed-back device includes a controlled pump for the substance.

6. Method for monitoring the function of a bloodstream access device, characterized by

sensing blood temperature in a channel of a lid member for a main body of a bloodstream access device which channel allows a continuous blood flow passing between an artery side and a vein side of the bloodstream access device, and

using the sensed value as an indication of the blood flow through the bloodstream access device.