Infiltration cannula

• US 20040236313A1
• Filed: 06/25/2004
• Published: 11/25/2004
• Est. Priority Date: 05/21/2003
• Status: Abandoned Application

• Current Assignee: Jeffrey A. Klein
• Original Assignee: Jeffrey A. Klein
• Inventors: Klein, Jeffrey A.
• Application Number:
  US10/877,566
• Publication Number:
  US 20040236313A1
• Time in Patent Office: Days
• US Class Current: 604/537
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/0097 characterised by the hub connectors A61M39/10
• CPC Class Codes: A61M 37/00 Other apparatus for introducing media into the body for reproduction or fertilisation A61B17/425; apparatus for iontophoresis or cataphoresis A61N1/30; Percutany, i.e. introducing medicines into the body by diffusion through the skin salt baths A61H33/04
• 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

An infiltration cannula and method of using the infiltration cannula during an infiltration procedure are disclosed herein. The infiltration cannula has a flexible cannula and a hub. The cannula has a proximal end and a distal end. The cannula also has a plurality of apertures disposed in a pattern about the distal end. The apertures are configured to infiltrate fluid into the subcutaneous or muscle tissue of a patient. The hub is configured to be held by a person performing the infiltration procedure. The hub has a first end and an opposing second end. The first end is attached to the proximal end of the flexible cannula and the second end includes a connector configured to connect to an input source for receiving the fluid to be infiltrated into the subcutaneous tissue of the patient. The fluid flows from the connector, through the hub and into the cannula.

Claims

1. An infiltration cannula for use in an infiltration procedure, the infiltration cannula comprising:

a flexible tubular needle comprising;

a proximal end;

a distal end; and

a plurality of apertures disposed in a pattern about the distal end, the tubular needle sized to receive a rigid stylet therein, and the apertures configured to infiltrate fluid into subcutaneous tissue or muscle of a patient; and

a hub configured to be held by a person performing the infiltration procedure, the hub having a first end and an opposing second end, the first end being attached to the proximal end of the tubular needle, the second end comprising a connector configured to connect to an input source for receiving the fluid to be infiltrated into the subcutaneous tissue of the patient, the fluid flowing from the connector, through the hub and into the cannula

2. The infiltration cannula as recited in claim 1, wherein the flexible material comprises plastic.

3. The infiltration cannula as recited in claim 1, wherein the distal end of the cannula is closed to cover the tip of the stylet.

4. The infiltration cannula as recited in claim 1, wherein the distal end of the cannula is open with a hole allowing a tip of the rigid stylet to protrude through.

5. The infiltration cannula as recited in claim 4, where in the tip of the rigid stylet is sharp enough to directly insert through the skin of the patient.

6. The infiltration cannula as recited in claim 1, wherein the rigid stylet is blunt tipped.

7. The infiltration cannula as recited in claim 1, wherein the rigid stylet is fabricated from stainless metal or rigid plastic.

8. The infiltration cannula as recited in claim 1, wherein the apertures are arranged in a helical pattern.

9. The infiltration cannula as recited in claim 1, wherein the apertures are arranged in a spiral pattern.

10. The infiltration cannula as recited in claim 1, wherein the apertures are distributed over about 33% to about 90% of the distal end of the tubular needle.

11. The infiltration cannula as recited in claim 1, wherein the apertures are round.

12. The infiltration cannula as recited in claim 1, wherein the apertures are oval.

13. The infiltration cannula as recited in claim 1, wherein the fluid is a therapeutic solution.

14. The infiltration cannula as recited in claim 13, wherein the infiltration procedure is performed in conjunction a surgical procedure involving an incision through the skin.

15. The infiltration cannula as recited in claim 13 wherein the infiltration procedure is performed simply to deliver a therapeutic solution using a tumescent-like technique.

16. A method of infiltrating fluid into subcutaneous tissue of a patient, the method comprising:

(a) inserting an infiltration cannula through a patient'"'"'s skin and into the subcutaneous tissue of the patient at a desired site, the infiltration cannula comprising a connector for receiving the fluid from a fluid source, a hub in communication with the connector and a tubular needle in communication with the hub, the tubular needle having a plurality of apertures disposed in a pattern about a distal end, the apertures configured to infiltrate the fluid into the subcutaneous the tissue of the patient;

(b) receiving fluid from the fluid source via the connector;

(c) transporting the fluid from the connector through the hub and into the tubular needle; and

(d) ejecting the fluid from the tubular needle into the subcutaneous tissue of the patient via the apertures.

17. The method recited in claim 16, further comprising repeating steps (a)-(d).

18. The method recited in claim 17, wherein steps (a)-(d) are repeated at intervals that vary between minutes to many hours.

19. The method recited in claim 16, comprising the further step of removing the infiltration cannula.

20. The method recited in claim 19, further comprising inserting the infiltration cannula at a new site in the patient'"'"'s skin.

21. The method recited in claim 20, wherein at least two infiltration cannulas are inserted into the patient'"'"'s skin to prevent disruption of the method when one infiltration cannula is removed.

22. The method recited in claim 16, wherein the fluid is a local anesthesia.

23. The method recited in claim 22, wherein the method is performed in conjunction with a surgical procedure or therapeutic drug delivery.