Subcutaneous implantable sensor set having the capability to remove deliver fluids to an insertion site

• US 5,951,521 A
• Filed: 09/25/1998
• Issued: 09/14/1999
• Est. Priority Date: 09/25/1998
• Status: Expired due to Term

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Minimed, Inc. (Medtronic Plc)
• Inventors: Mastrototaro, John J., Hague, Clifford W.
• Primary Examiner(s): Stright, Ronald
• Assistant Examiner(s): Thissell, Jeremy
• Application Number:
  US09/161,128
• Time in Patent Office: 354 Days
• Field of Search: 604/27, 604/43, 604/44, 604/48, 604/93, 604/244, 604/256, 604/264, 604/272, 604/280, 604/284, 604/541, 604/174, 604/180, 600/345, 600/347, 600/372, 600/373, 600/377
• US Class Current: 604/174
• CPC Class Codes: A61B 5/14865 invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors
• CPC Class Codes: A61B 5/415 the glands, e.g. tonsils, adenoids or thymus
• CPC Class Codes: A61B 5/418 lymph vessels, ducts or nodes
• CPC Class Codes: A61B 5/6849 in combination with a needle set
• CPC Class Codes: A61M 2005/1726 the body parameters being measured at, or proximate to, the infusion site

Abstract

An implantable subcutaneous set for mounting onto a skin of a user and contacting a subcutaneous placement site beneath the skin includes a base, a cannula, an insertion device and an externally extending conduit. The base is used to secure the implantable subcutaneous set to the skin of the user. The cannula is coupled to and extends from the base. Also, the cannula has at least one lumen with an end for fluid communication with the subcutaneous placement site. In addition, the cannula has at least one port formed near another end of the lumen opposite the end for fluid communication. The insertion device is operatively coupled to the implantable subcutaneous set and the cannula to facilitate insertion of the cannula to contact the subcutaneous placement site. Also, the insertion device may be withdrawn from the subcutaneous set and the cannula after placing the cannula in contact with the subcutaneous placement site. The externally extending conduit is in fluid communication with the at least one port of the cannula to facilitate removal of a fluid that builds up around the at least one lumen of the cannula after insertion of the cannula to substantially prevent degradation of performance of the implantable subcutaneous set while in contact with the subcutaneous placement site. The build up of the fluids are bodily fluids of the user that pool around the port in the at least one lumen of the cannula, and the pool of fluids degrades the performance of the implantable subcutaneous set by obscuring access of other bodily fluids to the at least one lumen of the cannula.

Claims

1. An implantable subcutaneous set for mounting onto a skin of a user and contacting a subcutaneous placement site beneath the skin, the implantable subcutaneous set comprising:

a base to secure the implantable subcutaneous set to the skin of the user;

a cannula coupled to and extending from the base, wherein the cannula has at least one lumen with an end for fluid communication with the subcutaneous placement site, wherein the cannula also has at least one port formed near another end of the lumen opposite the end for fluid communication;

an insertion device operatively coupled to the implantable subcutaneous set and the cannula to facilitate insertion of the cannula to contact the subcutaneous placement site; and

an externally extending conduit in fluid communication with the at least one port of the cannula to facilitate removal of fluid that builds up around the at least one lumen of the cannula after insertion of the cannula to substantially prevent degradation of performance of the implantable subcutaneous set while in contact with the subcutaneous placement site.

2. An implantable subcutaneous set in accordance with claim 1, wherein the externally extending conduit includes a septum covering one end of the externally extending, conduit to inhibit exposure to external contaminates and facilitate removal of built up fluid by a syringe.

3. An implantable subcutaneous set in accordance with claim 2, wherein the externally extending conduit includes a lumen that extends from the base and an external port and guide for the syringe.

4. An implantable subcutaneous set in accordance with claim 2, wherein the externally extending conduit is further useable for introducing fluids into the subcutaneous placement site by a medication delivery device.

5. An implantable subcutaneous set in accordance with claim 2, further including a sensor having a connection portion coupled to the subcutaneous set, and a sensor portion exposed by the at least one port in the at least one lumen of the cannula to determine characteristics of the user at the subcutaneous placement site.

6. An implantable subcutaneous set in accordance with claim 1, wherein the built up fluid is bodily fluids of the user that pool around the at least one port in the at least one lumen of the cannula, and wherein the pool of fluids degrades the performance of the implantable subcutaneous set by obscuring access of other bodily fluids to the at least one lumen of the cannula.

7. An implantable subcutaneous set in accordance with claim 6, further including a flexible sensor having a connection portion coupled to the base, and a sensor portion exposed by the at least one port in the at least one lumen of the cannula to determine characteristics of the user at the subcutaneous placement site.

8. An implantable subcutaneous set in accordance with claim 1, wherein the externally extending conduit includes a filter covering one end of the externally extending conduit to inhibit exposure to external contaminates and a wicking material to facilitate removal of built up fluid by a wicking process.

9. An implantable subcutaneous set in accordance with claim 8, wherein the externally extending conduit includes a lumen that extends from the base and an external port and guide for a syringe to remove fluids trapped by the wicking material.

10. An implantable subcutaneous set in accordance with claim 8, wherein the externally extending conduit is further useable for introducing fluids into the subcutaneous placement site by a medication delivery device.

11. An implantable subcutaneous set in accordance with claim 8, further including a flexible sensor having a connection portion coupled to the base, and a sensor portion exposed by the at least one port in the at least one lumen of the cannula to determine characteristics of the user at the subcutaneous placement site.

12. An implantable subcutaneous set in accordance with claim 1, wherein the insertion device is withdrawable from the subcutaneous set and the cannula after placing the cannula in contact with the subcutaneous placement site.

13. An implantable subcutaneous set in accordance with claim 1, wherein the externally extending conduit is connectable to a pump for removal of built up fluid.

14. An implantable subcutaneous set in accordance with claim 1, further including a sensor having a connection portion coupled to the subcutaneous set, and a sensor portion exposed by the at least one port in the at least one lumen of the cannula to determine characteristics of the user at the subcutaneous placement site, and wherein the externally extending conduit is useable for removal of the built up fluid over the sensor.

15. An implantable subcutaneous set in accordance with claim 1, further including a sensor having a connection portion coupled to the subcutaneous set, and a sensor portion exposed by the at least one port in the at least one lumen of the cannula to determine characteristics of the user at the subcutaneous placement site, and wherein the externally extending conduit is useable for removal of the built up fluid that is useable to calibrate the sensor.