Venous dialysis needle

• US 5,662,619 A
• Filed: 11/27/1995
• Issued: 09/02/1997
• Est. Priority Date: 11/27/1995
• Status: Expired due to Term

• Current Assignee: Zarate, Alfredo R.
• Original Assignee: Zarate, Alfredo R.
• Inventors: Zarate, Alfredo R.
• Primary Examiner(s): McDermott, Corrine M.
• Assistant Examiner(s): Mehta, Bhisma
• Application Number:
  US08/563,210
• Time in Patent Office: 645 Days
• Field of Search: 604/239, 604/264, 604/272, 604/158, 604/161, 604/164, 604/169, 604/170, 604/171, 604/22, 604/27, 604/29, 604/30, 604/48, 604/93, 604/131, 604/246-247, 604/256, 604/4-6, 606/108, 606/167, 606/170, 606/184, 606/185
• US Class Current: 604/272
• CPC Class Codes: A61M 1/3661 for haemodialysis
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/3291 Shafts with additional lateral openings

Abstract

A dialysis needle using lateral openings and diverters. The diverters increase the blood flow through the lateral openings in venous needles.

Claims

1. A dialysis needle comprising:

a hollow shaft having an exterior surface, an interior surface, a central axis, an open proximal end, an open distal end, and at least two lateral openings; and

at least two non-pivotable diverters located on said interior surface of said hollow shaft, each of said diverters positioned adjacent an associated one of said lateral openings, each of said diverters being fixed in position and projecting into a lumen of said hollow shaft at an angle toward said central axis of said hollow shaft.

2. The dialysis needle according to claim 1, wherein said lateral openings are evenly spaced around a circumference of said hollow shaft.

3. The dialysis needle according to claim 1, wherein each of said diverters is located between said associated one of said lateral openings and said distal end.

4. The dialysis needle according to claim 1, wherein each of said diverters is located between said associated one of said lateral openings and said proximal end.

5. The dialysis needle according to claim 1, wherein said distal end is bevelled.

6. The dialysis needle according to claim 1, wherein each of said diverters projects at least 0.1 mm into said hollow shaft.

7. A dialysis needle comprising:

a hollow shaft having an exterior surface, an interior surface, a central axis, an open proximal end, an open distal end, and at least two lateral openings;

at least two non-pivotable diverters located on said interior surface of said hollow shaft, each of said diverters adjacent an associated one of said lateral openings, each of said diverters projecting into a lumen of said hollow shaft at an angle toward said central axis of said hollow shaft; and

a trocar having a shaft and a distal end, said trocar being disposed within said hollow shaft.

8. A dialysis needle according to claim 7, wherein said distal end of said trocar is bevelled and said distal end of said hollow shaft is blunt.

9. A dialysis needle according to claim 7, wherein said distal end of said trocar is blunt and said distal end of said hollow shaft is bevelled.

10. A dialysis needle comprising:

a hollow shaft having an exterior surface, an interior surface, a central axis, an open proximal end, an open distal end, and at least one lateral opening, said lateral opening located between 0.8 mm and 2.0 mm from said distal end; and

a non-pivotable diverter located on said interior surface of said hollow shaft adjacent said lateral opening, said diverter projecting into a lumen of said hollow shaft at an angle toward said central axis of said hollow shaft.

11. A dialysis needle comprising:

a hollow shaft having an exterior surface, an interior surface, a central axis, an open proximal end, an open distal end, and at least one lateral opening, said lateral opening located between 0.8 mm and 2.0 mm from said distal end;

a non-pivotable diverter located on said interior surface of said hollow shaft adjacent said lateral opening, said diverter projecting into a lumen of said hollow shaft at an angle toward said central axis of said hollow shaft; and

a trocar having a shaft and a distal end, said trocar being disposed within said hollow shaft.