Microdialysis catheter for insertion into a blood vessel

• US 6,346,090 B1
• Filed: 07/23/1999
• Issued: 02/12/2002
• Est. Priority Date: 07/23/1999
• Status: Expired due to Term

• Current Assignee: Maquet Critical Care AB (Getinge AB)
• Original Assignee: Anders Franco-Cereceda, Jan Liska
• Inventors: Liska, Jan, Franco-Cereceda, Anders
• Primary Examiner(s): Seidel, Richard K.
• Assistant Examiner(s): Thanh, LoAn H.
• Application Number:
  US09/359,312
• Time in Patent Office: 935 Days
• Field of Search: 604/29, 604/27, 604/35, 604/264, 604/523, 604/43
• US Class Current: 604/29
• 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
• CPC Class Codes: A61B 5/14528 invasively
• CPC Class Codes: A61M 25/00 Catheters; Hollow probes dilators A61M29/00; peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00 ; for measuring or testing A61B; materials for catheters A61L29/00

Abstract

A catheter for insertion into a blood vessel of a living being, which includes an elongated catheter body and membrane defining a dialysis chamber; a first channel provided for delivery of dialysis liquid to the dialysis chamber and a second channel provided for the discharge of dialysis liquid from the dialysis chamber, wherein the dialysis chamber comprises a plurality of tubular members, each having an inlet end and an outlet end, all the inlet ends being connected to the first channel and all the outlet ends being connected to the second channel.

Claims

1. A microdialysis catheter for insertion into a blood vessel of a living being, comprising:

an elongate catheter body having first channel means for delivery of dialysis liquid and second channel means for discharge of dialysis liquid, a portion of said catheter body having a reduced diameter forming a straight cylindrical portion;

a relatively stiff supporting sleeve arranged around said cylindrical portion and having an outer circumference;

dialysis chamber means defined by a plurality of tubular membrane members arranged in close relation to one another in one layer about said outer circumference of said supporting sleeve, each tubular membrane member having an inlet end and an outlet end, said inlet and outlet ends being embedded in annular blocks arranged about said cylindrical portion at a proximal and a distal end thereof, respectively, said blocks allowing fluid communication between said first channel means and one of said inlet and outlet ends of said plurality of tubular membrane members, and allowing fluid communication between said second channel means and the other of said inlet and outlet ends of said plurality of tubular membrane members.

2. The catheter according to claim 1, wherein said annular blocks and said plurality of tubular membrane members are arranged around said outer circumference of said supporting sleeve.

3. The catheter according to claim 1, wherein said annular blocks define a distribution chamber and a collection chamber, respectively, communicating with said first and second channels means, respectively.

4. The catheter according to claim 1, wherein said plurality of tubular membrane members are parallel to an axis of said cylindrical portion.

5. The catheter according to claim 1, wherein said plurality of tubular membrane members are inclined in relation to a plane through an axis of said cylindrical portion.