Method and apparatus for location of a catheter tip

• US 5,749,835 A
• Filed: 01/09/1997
• Issued: 05/12/1998
• Est. Priority Date: 09/06/1994
• Status: Expired due to Fees

• Current Assignee: Smiths Medical MD Incorporated
• Original Assignee: Sims Deltec, Inc.
• Inventors: Glantz, Jerald
• Primary Examiner(s): Casler, Brian L.
• Application Number:
  US08/782,518
• Time in Patent Office: 488 Days
• Field of Search: 128/653.1, 128/654, 128/656-658, 128/897, 128/899, 128/903, 324/207.11, 324/207.17, 324/207.28, 600/11-14, 600/125, 600/117, 600/407, 600/431, 600/433-435, 600/424, 604/280
• US Class Current: 600/424
• CPC Class Codes: A61B 5/06 Devices, other than using radiation, for detecting or locating foreign bodies for removing same A61B17/50 ; determining position of probes within or on the body of the patient

Abstract

The present invention relates to a method and apparatus used to place a catheter having a distal end and a proximal end where the proximal end cannot be trimmed within a patient. The method and apparatus utilize a device operative in locating the tip of a catheter, which includes a detector assembly having a detector and a locator. The detector of the detector assembly is locked into positioned remote from the distal end of the catheter prior to inserting the catheter in the patient. The distal end of the catheter is trimmed, as to define a trimmed distal end, the detector is then unlocked and placed proximate the trimmed end. In the preferred embodiment the detector is locked into place proximate the trimmed distal end and the catheter is placed within the patient.

Claims

1. A method for determining the location of a tip of a catheter, inside biological tissue, wherein the catheter includes a distal end and a proximal end and a lumen positioned therebetween, the method comprising the steps of:

a) providing a source;

b) providing a detector locked within the lumen of the catheter remote from the distal end of the catheter, the detector operable in generating a voltage when the source is proximate the detector;

c) trimming the distal end of the catheter as to define a trimmed distal end;

d) unlocking the detector from within the lumen of the catheter;

e) positioning the detector proximate the trimmed distal end of the catheter;

f) positioning the trimmed distal end of the catheter within the biological tissue; and

g) placing the source proximate the detector to locate the trimmed distal end of the catheter.

2. A method as in claim 1 wherein said source is operative in generating an external alternating magnetic field.

3. A method as in claim 1 further comprising the step of locking the detector proximate the trimmed distal end of the catheter after positioning the detector proximate the distal end of the catheter.

4. A method as in claim 3 further comprising the steps of unlocking the detector and removing the detector.

5. A method as in claim 4, wherein the catheter includes a fitting at a proximal end, the method further comprising the step of connecting a mating fitting to the fitting.

6. A catheter detection system, comprising:

a) a catheter including a proximal end, a distal end, and a lumen positioned therebetween;

b) a catheter tip location device including a source providing an alternating magnetic current and a detector positioned within the lumen of the catheter;

the catheter tip location device operable in detecting the position of the detector positioned within the lumen of the catheter; and

c) a lock positioned at the proximal end of the catheter, the lock being selectively movable between a locked position and an unlocked position, the lock selectively locking the detector remote from the distal end.

7. A catheter detection system as in claim 6 wherein the proximal end of the catheter includes a fitting.

8. A catheter detection system as in claim 6 wherein the lock comprises a locking hemostasis valve.

9. A catheter detection system as in claim 6 wherein the catheter includes a single distal end and multiple proximal ends, and multiple lumens therebetween, each of the multiple proximal ends including a fitting.

10. A catheter detection system as in claim 6 wherein the catheter is a chest-type catheter.

11. A catheter detection system as in claim 6 wherein the catheter is a peripherally inserted central catheter.

12. A catheter comprising:

a) a catheter body including a proximal end, a distal end, and a lumen positioned therebetween;

b) a catheter detector positioned within the lumen of the catheter remote from the distal end of the catheter; and

c) a lock positioned at the proximal end of the catheter, the lock being selectively movable between a locked position and an unlocked position, the lock operable in selectively locking the detector remote from the distal end, the lock locking the detector at the remote location.