SEED CARTRIDGE ADAPTOR AND METHODS FOR USE THEREWITH

• US 20080269540A1
• Filed: 04/25/2008
• Published: 10/30/2008
• Est. Priority Date: 04/27/2007
• Status: Abandoned Application

• Current Assignee: Biocompatibles UK Limited (Boston Scientific Corporation)
• Original Assignee: Worldwide Medical Technologies, LLC
• Inventors: Lamoureux, Gary A.
• Application Number:
  US12/110,202
• Publication Number:
  US 20080269540A1
• Time in Patent Office: Days
• US Class Current: 600/7
• CPC Class Codes: A61M 31/007 Injectors for solid bodies, e.g. suppositories
• CPC Class Codes: A61N 2005/101 Magazines or cartridges for seeds
• CPC Class Codes: A61N 5/1027 Interstitial radiation therapy

Abstract

Provided herein are adaptors that enable a seed cartridge that is configured to be used with a first type of needle having a locking hub to instead be used with a second type of needle having a cylindrical hub. Such a seed cartridge has a hub at its distal end that is configured to attach to the locking hub of the first type of needle. The adaptor includes a proximal portion configured to removably attach (and in specific embodiments lock) to the hub at the distal end of the seed cartridge. The adaptor also includes a distal portion configured to removably attach to the cylindrical hub of the second type of needle. A central portion of the adaptor connects the proximal and distal portions of the adaptor. A bore extends through the adaptor and allows seeds and optional spacers to be transferred from the seed cartridge into a hollow cannula of the second type of needle. Also provided herein are methods for using such adaptors.

Claims

1. An adaptor that enables a seed cartridge that is configured to be used with a first type of needle having a locking hub to instead be used with a second type of needle having a cylindrical hub, wherein the seed cartridge has a hub at its distal end that is configured to attach to the locking hub of the first type of needle, the adaptor including:

a proximal portion configured to removably attach to the hub at the distal end of the seed cartridge;

a distal portion configured to removably attach to the cylindrical hub of the second type of needle;

a central portion that connects said proximal and distal portions; and

a bore extending through said proximal, central and distal portions, and that allows seeds and optional spacers to be transferred from the seed cartridge into a hollow cannula of the second type of needle.

2. The adaptor of claim 1, wherein the proximal portion is configured to removably lock to the hub at the distal end of the seed cartridge.

3. The adaptor of claim 1, wherein the proximal portion is configured to removably friction fit to the hub at the distal end of the seed cartridge.

4. The adaptor of claim 1, wherein:

a distal portion of said bore has a first diameter that is slightly larger than the outer diameter of the cylindrical hub of the second type of needle thereby enabling the cylindrical hub of the second type of needle to be removably accepted in said distal portion of said bore; and

a main portion of said bore has a second diameter that as smaller than the outer diameter of the cylindrical hub of the second type of needle to thereby prevent the cylindrical hub of the second type of needle from being accepted in said main portion of said bore.

5. The adaptor of claim 4, wherein:

said second diameter of said main portion of said bore is approximately equal to the inner diameter of the hollow cannula of the second type of needle.

6. The adaptor of claim 4, wherein:

a depth of said distal portion of said bore is sufficient to enable the adaptor to rigidly connect to the cylindrical hub of the second type of needle without requiring additional support.

7. The adaptor of claim 1, wherein the seed cartridge includes a channel for storing seeds and optional spacers, and wherein:

said bore of the adaptor provides a continuous channel between the channel of the seed cartridge that stores seeds and optional spacers and the hollow cannula of the second type of needle.

8. The adaptor of claim 1, wherein said proximal portion of the adaptor includes peripheral threads and/or a peripheral flange that enables said proximal portion to removably lock to the hub at the distal end of the seed cartridge.

9. An adaptor that enables a seed cartridge that is configured to be used with a first type of needle having a locking hub to instead be used with a second type of needle having a cylindrical hub, wherein the seed cartridge has a hub at its distal end that is configured to attach to the locking hub of the first type of needle, the adaptor including:

a first portion configured to removably attach to the hub at the distal end of the seed cartridge;

a second portion configured to removably attach to the cylindrical hub of the second type of needle; and

a bore extending through said first and second portions, said bore to allow seeds and optional spacers to be transferred from the seed cartridge into a hollow cannula of the second type of needle.

10. The adaptor of claim 9, wherein said first portion of the adaptor includes peripheral threads or a peripheral flange that enables said first portion to removably lock to the hub at the distal end of the seed cartridge.

11. The adaptor of claim 9, wherein said first portion of the adaptor is configured to removably friction fit to the hub at the distal end of the seed cartridge.

12. The adaptor of claim 9, wherein:

a first portion of said bore has a first diameter that is slightly larger than the outer diameter of the cylindrical hub of the second type of needle to thereby enable the cylindrical hub of the second type of needle to be removably accepted in said first portion of said bore; and

a second portion of said bore has a second diameter that is smaller than the outer diameter of the cylindrical hub of the second type of needle to thereby prevent the cylindrical hub of the second type of needle from being accepted in said second portion of said bore.

13. The adaptor of claim 12, wherein:

a depth of said first portion of said bore is sufficient to enable the adaptor to rigidly connect to the cylindrical hub of the second type of needle without requiring additional support.

14. The adaptor of claim 9, wherein the seed cartridge includes a channel for storing seeds and optional spacers, and wherein:

said bore of the adaptor provides a continuous channel between the channel of the seed cartridge that stores seeds and optional spacers and the hollow cannula of the second type of needle.

15. A method for implanting seeds and optional spacers into patient tissue, the method comprising:

(a) inserting a distal end of a hollow needle into patient tissue at a desired location and to a desired depth, the needle having a cylindrical needle hub at its proximal end;

(b) using an adaptor to attach the cylindrical needle hub to a proximal end of a seed cartridge;

(c) inserting a stylet into an opening at a proximal end of the seed cartridge;

(d) urging seeds and optional spacers from the seed cartridge assembly, through the adaptor, and through a lumen of the hollow needle, to a distal end of the hollow needle; and

(e) retracting the hollow needle and the seed cartridge, while the stylet is held in place, to thereby deposit the seeds and optional spacers at the desired location and to the depth.

16. The method of claim 15, wherein step (b) includes:

(b.1) connecting the adaptor to the cylindrical needle hub of the hollow needle by inserting at least a portion of the cylindrical needle hub into a distal portion of a bore of the adaptor, such that the adaptor is rigidly connected to the cylindrical needle hub of the hollow needle without requiring additional support; and

(b.2) connecting the seed cartridge to a proximal end of the adaptor.

17. A method for implanting seeds and optional spacers into patient tissue, the method comprising:

(a) inserting a distal end of a hollow needle into patient tissue at a desired location and to a desired depth, the needle having a cylindrical needle hub at its proximal end;

(b) using an adaptor to attach the cylindrical needle hub to a proximal end of a seed cartridge assembly;

(c) inserting a stylet into an opening at a proximal end of the seed cartridge;

(d) urging seeds and optional spacers from the seed cartridge, through the adaptor, and through a lumen of the hollow needle, to a distal end of the hollow needle;

(e) retracting the stylet from the seed cartridge;

(f) removing the seed cartridge and optionally the adaptor;

(g) inserting a stylet into an opening at a distal end of the hollow needle;

(h) urging the seeds and optional spacers to a distal end of the hollow needle; and

(i) retracting the hollow needle, while the stylet is held in place, to thereby deposit the seeds and optional spacers at the desired location and to the depth.

18. The method of claim 17, wherein step (b) includes:

(b.1) connecting the adaptor to the cylindrical needle hub of the hollow needle by inserting at least a portion of the cylindrical needle hub into a distal portion of a bore of the adaptor, such that the adaptor is rigidly connected to the cylindrical needle hub of the hollow needle without requiring additional support; and

(b.2) connecting the seed cartridge to a proximal end of the adaptor.