VENTED REFILL ARRANGEMENT AND ASSOCIATED TOOLS FOR IMPLANTABLE DRUG-DELIVERY DEVICES

• US 20160038672A1
• Filed: 07/24/2015
• Published: 02/11/2016
• Est. Priority Date: 08/05/2014
• Status: Abandoned Application

• Current Assignee: Andrew Dunn, Brett Daniel Schleicher, David Mathew Wessel, Julian D. Kavazov, Tuan Pham, William Andrew Brandt
• Original Assignee: Andrew Dunn, Brett Daniel Schleicher, David Mathew Wessel, Julian D. Kavazov, Tuan Pham, William Andrew Brandt
• Inventors: Brandt, William Andrew, Kavazov, Julian D., Wessel, David Mathew, Dunn, Andrew, Schleicher, Brett Daniel, Pham, Tuan
• Application Number:
  US14/807,940
• Publication Number:
  US 20160038672A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61M 2039/0217 at least some chambers being stacked separated by another septum
• CPC Class Codes: A61M 39/0208 Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• 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 5/162 Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube in jet-action syringes A61M5/30; connectors for tubes having sealed ends and a needle for piercing them A61M39/14
• CPC Class Codes: A61M 5/329 characterised by features of the needle shaft

Abstract

Refill needles include a refill lumen for refilling a drug reservoir with a liquid and a venting channel for venting the device to be refilled. In various embodiments, the termini of the refill lumen and the venting channel are longitudinally displaced along the needle.

Claims

1. A needle for use in connection with a refill port assembly comprising an orifice through a surface of the housing for receiving the needle, a first housing defining a first chamber having first and second open ends and fluidly coupled, via at least one bore through the first housing, to a ventable interior portion of the shell, a second housing defining a second chamber having an open end and fluidly coupled, via at least one bore through the second housing, to the drug reservoir, and first and second needle-penetrable septums, wherein the orifice, the first and second housings and the first and second septums are arranged in series with the first septum disposed between, and penetrably sealing, the orifice and the first open end of the first housing, and the second septum disposed between, and penetrably sealing, the second open end of the first housing and the open end of the second housing, the needle comprising an elongated member having:

a refill lumen therethrough configured for liquid travel therethrough and terminating in an exit port;

a venting channel therethrough and having a vent at least at each end thereof, the venting channel being configured for gas travel therethrough and fluidically isolated from the refill lumen; and

a needle tip, wherein

the exit port and a first one of the vents are respectively disposed along the elongated member and spaced apart so that, with the needle fully inserted into the refill port assembly, the exit port is located in the second chamber and the first vent is located in the first chamber.

2. The needle of claim 1, wherein the refill lumen and the venting channel are radially spaced-apart bores through the elongated member.

3. The needle of claim 1, wherein the refill lumen and the venting channel are substantially coaxial bores through the elongated member.

4. The needle of claim 1, wherein the venting channel is a partially open recessed flute on an external surface of the elongated member.

5. The needle of claim 4, wherein the venting channel extends over at least a portion of the elongated member in a spiral.

6. The needle of claim 2, wherein the refill lumen and the venting channel have different cross-sections.

7. The needle of claim 3, wherein the refill lumen and the venting channel are radially offset with an outer wall of the refill lumen resting against an inner wall of the venting channel.

8. The needle of claim 1, further comprising a pencil-point, non-coring, beveled, blunt, conical, Whitacre, Tuohy, or Sprotte needle tip.

9. The needle of claim 1, wherein the needle has a size under 20 gauge.

10. The needle of claim 1, wherein the first vent is covered by a selectively permeable membrane.

11. A needle comprising:

an elongated member;

a refill lumen therethrough configured for liquid travel therethrough and terminating in an exit port;

a venting channel therethrough and having a vent at least at each end thereof, the venting channel being configured for gas travel therethrough and fluidically isolated from the refill lumen; and

a needle tip.

12. The needle of claim 11, wherein the refill lumen and the venting channel are radially spaced-apart bores through the elongated member.

13. The needle of claim 11, wherein the refill lumen and the venting channel are substantially coaxial bores through the elongated member.

14. The needle of claim 11, wherein the venting channel is a partially open recessed flute on an external surface of the elongated member.

15. The needle of claim 14, wherein the venting channel extends over at least a portion of the elongated member in a spiral.

16. The needle of claim 12, wherein the refill lumen and the venting channel have different cross-sections.

17. The needle of claim 13, wherein the refill lumen and the venting channel are radially offset with an outer wall of the refill lumen resting against an inner wall of the venting channel.

18. The needle of claim 11, further comprising a pencil-point, non-coring, beveled, blunt, conical, Whitacre, Tuohy, or Sprotte needle tip.

19. The needle of claim 11, wherein the needle has a size under 20 gauge.

20. The needle of claim 11, wherein the first vent is covered by a selectively permeable membrane.