Dialysis catheter

• US 20050131341A1
• Filed: 08/23/2004
• Published: 06/16/2005
• Est. Priority Date: 01/09/2001
• Status: Active Grant

• Current Assignee: Argon Medical Devices
• Original Assignee: REX Medical LP
• Inventors: McGuckin, James F. Jr., Hinchliffe, Peter W. J., Paris, Michael W., Tashjian, Paul
• Granted Patent: US 7,799,014 B2
• Time in Patent Office: Days
• US Class Current: 604/43
• CPC Class Codes: A61M 1/285 Catheters therefor
• CPC Class Codes: A61M 1/3661 for haemodialysis
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0036 with more than four lumina
• CPC Class Codes: A61M 2025/0081 Soft tip
• CPC Class Codes: A61M 25/0028 characterized by features relating to at least one lumen located at the proximal part of the catheter, e.g. alterations in lumen shape or valves catheter hubs A61M25/0097
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/0032 characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0069 Tip not integral with tube
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/0071 Multiple separate lumens multiple separate lumens throughout the catheter A61M25/0026
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/008 Strength or flexibility characteristics of the catheter tip
• CPC Class Codes: A61M 25/0102 Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod
• CPC Class Codes: A61M 25/0194 Tunnelling catheters
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/09041 Mechanisms for insertion of guide wires

Abstract

A dialysis catheter comprising a catheter body having a proximal portion, a distal portion, a first longitudinally extending central lumen configured to deliver blood, and at least three longitudinally extending lumens positioned radially of the central lumen and configured to withdraw blood from a patient. At least one blood delivery opening is formed in the distal portion of the catheter body and in fluid communication with the first lumen and configured for passage of blood therethrough. At least three blood withdrawal openings are formed in the outer wall of the catheter body, wherein each of the openings is in fluid communication with one of the at least three lumens and is configured for passage of blood from a patient

Claims

1-25. -25. (canceled)

26. A system for placement of a catheter comprising a dilating trocar and a catheter, the system comprising:

a) a trocar having an elongated tubular portion and a lumen extending longitudinally through the tubular portion, the tubular portion terminating in a dilating tip configured to dilate tissue and create a subcutaneous tissue tunnel, the lumen of the trocar having a first internal diameter and configured to removably receive a guidewire therethrough for retrieval of the guidewire through the tissue tunnel; and

b) a catheter having a first lumen configured for blood delivery and a second independent lumen configured for blood withdrawal from the patient, at least a portion of the catheter having an outer diameter configured for insertion through the subcutaneous tissue tunnel, one of the lumens of the catheter configured to receive the guidewire for over the wire insertion of the dialysis catheter through the tissue tunnel when the trocar is removed.

27. The system of claim 26, further comprising an elongated opening formed in the trocar communicating with the lumen of the trocar for insertion of the guidewire.

31. The system of claim 26, further comprising a stiffening member having a lumen to receive the guidewire, the stiffening member insertable into the catheter so the stiffening member and guidewire positioned therein are both positioned in the catheter lumen.

32. The system of claim 31, wherein the stiffening member is insertable into the first lumen of the catheter.

33. The system of claim 31, wherein the stiffening member includes threads at the proximal end for mounting the stiffening member to the catheter.

34. The system of claim 26, wherein the catheter has a distal portion of reduced diameter.

35. The system of claim 34, wherein the second lumen of the catheter terminates proximally of the first lumen.

28-30. -30. (canceled)

36. A system for placement of a catheter comprising:

a) a catheter having a first lumen configured for blood delivery to a patient and a second independent lumen configured for blood withdrawal from the patient, at least a portion of the catheter having an outer diameter configured for insertion through a subcutaneous tissue tunnel, the catheter configured to receive a guidewire which passes through the subcutaneous tissue tunnel; and

b) a stiffening member received in the catheter such that the catheter with the stiffening member positioned therein is inserted into the patient, at least a portion of the stiffening member configured to pass through the subcutaneous tissue tunnel.

37. The system of claim 36, wherein the stiffening member is removably secured to the catheter.

38. The system of claim 36, wherein the stiffening member is received in one of the lumens of the catheter.

39. The system of claim 37, wherein the stiffening member has a longitudinally extending lumen to receive the guidewire.

40. The system of claim 37, wherein the stiffening member includes threads at a proximal portion for securement to the catheter.

41. The system of claim 36, further comprising a guidewire passing member to pass the guidewire through the subcutaneous tissue tunnel.

42. The system of claim 36, wherein the second lumen of the catheter terminates proximally of the first lumen.

43. The system of claim 42, wherein the distal portion of the catheter includes a reduced diameter region.

44. The system of claim 36, wherein the stiffener is positioned in the first lumen of the catheter and has a lumen to receive the guidewire.

45. The system of claim 36, wherein at least a portion of the first lumen is circular in cross-section and at least a portion of the second lumen is non-circular in cross-section.

46. The system of claim 45, wherein the second lumen terminates in an opening proximal of a distal opening of the first lumen.

47. The system of claim 45, wherein the stiffener is removably positioned in the first lumen of the catheter.

48. The system of claim 36, wherein the catheter includes a spacer rib.

49. The system of claim 48, wherein the second lumen communicates with the patient proximal of the spacer rib.

50. The system of claim 45, further comprising side holes communicating with the first lumen.

51. The system of claim 36, wherein the distal end of the catheter has an elongated reduced diameter region, the first lumen extending through the reduced diameter region.

52. The system of claim 51, wherein the first lumen terminates in a distal opening in the reduced diameter region and the second lumen terminates in an opening proximal of the distal opening.

53. The system of claim 52, wherein at least a portion of the first lumen is circular in cross-section and at least a portion of the second lumen is non-circular in cross-section.