Method of manufacturing a microdialysis catheter

• US 6,632,315 B2
• Filed: 04/06/2001
• Issued: 10/14/2003
• Est. Priority Date: 03/11/1998
• 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): Eashoo, Mark
• Application Number:
  US09/826,956
• Publication Number:
  US 20010015253A1
• Time in Patent Office: 921 Days
• Field of Search: 156/244.13, 156/244.18, 156/257, 264/145, 264/154, 264/209.1, 264/209.3
• US Class Current: 156/244.13
• 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: B01D 61/28 Apparatus therefor
• CPC Class Codes: Y10T 156/1064 Partial cutting [e.g., grooving or incising]

Abstract

A method of manufacturing a microdialysis catheter, comprises the steps of extruding a flexible material to form an elongate catheter body having a substantially cylindrical outer surface and a plurality of continuous internal channels extending in the longitudinal direction of said catheter body; sealing a free end of said catheter body; providing in said surface at a distance from said free end an opening extending into said catheter body to communicate with a portion of a first of said channels; providing communication between said first channel and a second of said channels at a distance from said free end shorter that said distance; and covering said opening by a microdialysis membrane.

Claims

1. A method of manufacturing a microdialysis catheter, comprising the steps of:

a) extruding a flexible material to form an elongate catheter body having a substantially cylindrical outer surface and a plurality of continuous internal channels extending in the longitudinal direction of said catheter body;

b) sealing a free end of said catheter body;

c) providing in said surface at a distance from said free end an opening extending into said catheter body to communicate with a portion of a first of said channels;

d) providing communication between said first channel and a second of said channels at a distance from said free end shorter that said distance; and

e) covering said opening by a microdialysis membrane.

2. The method according to claim 1, wherein said opening is formed by cutting.

3. The method according to claim 1, wherein said opening is formed by cutting away a wall portion of said catheter body in a wall region of one of said channels, thereby opening a section of said channel to provide a microdialysis chamber.

4. The method according to claim 3, wherein said channel is enlarged by removal of a wall part.