Access needle well-suited for percutaneous implantation in a body lumen

• US 20070078397A1
• Filed: 09/15/2005
• Published: 04/05/2007
• Est. Priority Date: 09/15/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Weststrate, Patrice
• Granted Patent: US 7,967,786 B2
• Time in Patent Office: Days
• US Class Current: 604/164.10
• CPC Class Codes: A61B 17/3415 for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 2017/3484 Anchoring means, e.g. spreading-out umbrella-like structure
• CPC Class Codes: A61J 15/0007 inserted by using a guide-wire guide wires A61M25/09
• CPC Class Codes: A61J 15/0015 Gastrostomy feeding-tubes insertion tools or methods A61B17/34
• CPC Class Codes: A61J 15/0038 expandable, e.g. umbrella type
• CPC Class Codes: A61J 15/0042 inflatable

Abstract

An access needle well-suited for percutaneous implantation in a body lumen, such as the stomach or the jejunum. In one embodiment, the access needle comprises a cannula, a needle, a retractable stopper and a spreader. The cannula is a tubular member having a proximal end, a distal end, a lumen and a pair of side windows providing access to the lumen. The needle is slidably mounted within the cannula lumen and comprises a needle stem and a needle handle, the needle stem having a proximal end, a distal end and a longitudinal lumen, the needle handle extending outwardly from the needle stem proximate to the proximal end thereof. The stopper is coupled to the needle stem for translational movement, the stopper comprising a pair of outwardly-biasing wings removably insertable through the side windows for engaging an interior surface of a patient. The spreader is mounted within the cannula and spreads the wings outwardly as the wings are inserted out the side windows.

Claims

1. An access needle comprising:

(a) a cannula, said cannula having a proximal end and a distal end;

(b) a needle, said needle being disposed within said cannula and having a proximal end and a distal end, said distal end of said needle being adapted to extend distally beyond said distal end of said cannula; and

(c) a retractable stopper, said retractable stopper being coupled to said needle for releasably anchoring said distal end of said needle within a patient.

2. The access needle as claimed in claim 1 wherein said needle comprises a needle stem, said needle stem being hollow.

3. The access needle as claimed in claim 2 wherein said needle further comprises a needle handle, said needle handle extending radially from said needle stem.

4. The access needle as claimed in claim 3 wherein said cannula includes a slot, said needle handle being receivable in and extendable through said slot.

5. The access needle as claimed in claim 4 wherein said slot extends longitudinally and wherein said needle is slidably mounted in said cannula.

6. The access needle as claimed in claim 1 wherein said needle is slidably mounted in said cannula, wherein said cannula is provided with a side window, and wherein said retractable stopper comprises a wing insertable through said side window.

7. The access needle as claimed in claim 6 further comprising a spreader disposed within said cannula and engageable with said wing for urging said wing out through said side window.

8. The access needle as claimed in claim 1 wherein said needle is movable between a distal position and a proximal position and wherein said distal end of said needle extends distally beyond said distal end of said cannula in each of said distal and proximal positions.

19. A method of delivering a distal end of a guidewire to a body lumen of a patient, said method comprising the steps of:

(a) percutaneously implanting the access needle of claim 2 in the body lumen of the patient; and

(b) inserting the distal end of a guidewire through the needle stem of the access needle and into the body lumen of the patient.

20. The method as claimed in claim 19 wherein the body lumen is located within the GI tract of the patient.

21. The method as claimed in claim 20 wherein the body lumen is located within the stomach of the patient.

22. The method as claimed in claim 20 wherein the body lumen is located within the jejunum of the patient.

23. A method of delivering a distal end of a suture to a body lumen of a patient, said method comprising the steps of:

(a) percutaneously implanting the access needle of claim 2 in the body lumen of the patient; and

(b) inserting the distal end of a guidewire through the needle stem of the access needle and into the body lumen of the patient.

24. The method as claimed in claim 23 wherein the body lumen is located within the GI tract of the patient.

25. The method as claimed in claim 24 wherein the body lumen is located within the stomach of the patient.

26. The method as claimed in claim 24 wherein the body lumen is located within the jejunum of the patient.

9. An access needle comprising:

(a) a cannula, said cannula having a proximal end and a distal end;

(b) a needle, said needle being slidably mounted within said cannula and having a proximal end and a distal end, said distal end of said needle being insertable into a patient; and

(c) a releasable anchor for releasably anchoring the distal end of said needle within a patient.

10. The access needle as claimed in claim 9 wherein said cannula is provided with a side window and wherein said releasable anchor comprises a biasing wing insertable through said side window.

11. The access needle as claimed in claim 10 further comprising means for urging said wing out through said side window.

12. The access needle as claimed in claim 9 further comprising means for positioning said needle between a distal position in which said releasable anchor is retracted and a proximal position in which said releasable anchor is deployed.

13. The access needle as claimed in claim 9 wherein said needle comprises a hollow needle stem.

14. An access needle comprising:

(a) a cannula, said cannula having a proximal end, a distal end, a longitudinal lumen, and an opposing pair of side windows, said opposing pair of side windows being intermediately positioned between said proximal end and said distal end and providing access to said longitudinal lumen;

(b) a needle, said needle comprising a needle stem slidably mounted within said longitudinal lumen of said cannula, said needle stem having a proximal end, a distal end and a longitudinal lumen, said needle stem being movable between a proximal position and a distal position, said distal end of said needle stem extending distally beyond said distal end of said cannula when said needle stem is in said distal position; and

(c) a retractable stopper, said retractable stopper being mounted on said needle stem and coupled thereto for translational movement, said retractable stopper comprising a pair of outwardly-biasing wings removably insertable through said opposing pair of side windows for engaging an interior surface of a patient.

15. The access needle as claimed in claim 14 further comprising means disposed within said cannula for spreading said outwardly-biasing wings outwardly through said opposing pair of side windows.

16. The access needle as claimed in claim 14 further comprising means for moving said needle stem between said distal position and said proximal position.

17. The access needle as claimed in claim 16 wherein said moving means comprises a needle handle coupled to said needle stem, said needle handle being receivable in a longitudinally-extending slot provided in said cannula.

18. An access needle comprising:

(a) a cannula, said cannula having a proximal end, a distal end and a longitudinally-extending lumen;

(b) a needle stem, said needle stem being hollow and having a proximal end and a distal end, said needle stem being slidably mounted within said longitudinally-extending lumen of said cannula and movable between a proximal position and a distal position, said distal end of said needle stem extending distally beyond said distal end of said cannula when said needle stem is positioned in said distal position; and

(c) retractable means, engageable with an interior surface of a patient after said distal end of said needle stem has been inserted into a patient and said needle stem is positioned in said proximal position, for preventing said needle stem from being withdrawn from a patient.