ANCHOR INSTRUMENTATION AND METHODS

• US 20090099527A1
• Filed: 10/01/2008
• Published: 04/16/2009
• Est. Priority Date: 10/10/2007
• Status: Active Grant

• Current Assignee: Interrad Medical, Inc.
• Original Assignee: Interrad Medical, Inc.
• Inventors: Rosenberg, Michael S., Christianson, Mark R.
• Granted Patent: US 8,147,459 B2
• Time in Patent Office: Days
• US Class Current: 604/175
• 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 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61B 2017/3484 Anchoring means, e.g. spreading-out umbrella-like structure
• CPC Class Codes: A61B 2017/3488 Fixation to inner organ or inner body tissue
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence

Abstract

Some embodiments of a medical device anchor system include an anchor sleeve that receives a catheter (or other medical instrument) though a working channel of the anchor sleeve. The anchor sleeve may include a first actuator that controls the extension of one or more subcutaneous tines into the subcutaneous region under the skin. The anchor sleeve can also include a second actuator that can cause the anchor sleeve to lock onto an outer portion of the catheter (or other medical instrument) arrange in the working channel.

Claims

1. An anchor sleeve device, comprising:

an elongate body that defines at least one working channel extending from a proximal opening to a distal tip opening so as to receive a catheter;

a subcutaneous anchor mechanism coupled to the elongate body, the subcutaneous anchor mechanism having one or more flexible anchors that extend outwardly away from a wall of the elongate body when in a deployed orientation in a subcutaneous layer;

a first actuator that is adjustable relative to the elongate body so as to shift the flexible anchors to the deployed orientation;

a locking device that releasably engages to the catheter when the catheter is received in the working channel; and

a second actuator that is adjustable relative to the elongate body so as to urge the locking device to compress at least a portion of an outer surface of the catheter when the catheter is received in the working channel.

2. The anchor sleeve of claim 1, wherein the first actuator is a slider device that reciprocates in a direction substantially parallel to a longitudinal axis of the elongate body.

3. The anchor sleeve of claim 2, wherein the second actuator is a twist device that at least partially rotates about the longitudinal axis of the elongate body.

4. The anchor sleeve of claim 1, wherein the flexible anchors are movable from a non-deployed orientation to the deployed orientation, the flexible anchors being flexed to a stressed condition when in the non-deployed orientation.

5. The anchor sleeve of claim 4, wherein the flexible anchors are retracted into an internal space of the elongate body when in the non-deployed orientation.

6. The anchor sleeve of claim 5, wherein the flexible anchors exhibit superelastic characteristics to flexibly return to the deployed orientation in response to movement of the first actuator.

7. The anchor sleeve of claim 1, wherein the subcutaneous anchor mechanism at least temporarily retains the elongate body in engagement with a skin insertion site when the flexible anchors are in the deployed orientation in the subcutaneous layer.

8. The anchor sleeve of claim 7, wherein the first actuator is movable between a first position that causes the flexible anchors to be retracted into an internal space of the elongate body during passage through a skin surface and a second position that causes the flexible anchors to extended toward the deployed orientation under the skin surface and in the subcutaneous region.

9. The anchor sleeve of claim 8, wherein the second actuator is movable between a first position that causes the elongate body to slidably receive the catheter and a second position that urges the locking device to releasably lock with the catheter when the catheter is received in the working channel.

10. The anchor sleeve of claim 9, wherein the locking device comprises a polymeric member that is compressed upon an outer surface of the catheter device in response to the adjustment of the second actuator when the catheter is received in the working channel.

11. The anchor sleeve of claim 10, wherein the locking device comprises a silicon cylindrical member that provides a seal around the outer surface of the catheter when the catheter is received in the working channel.

12. The anchor sleeve of claim 1, wherein the first actuator isolates a user-applied force to urge the flexible anchors toward the deployed orientation and the second actuator isolates a user-applied force required to urge the locking device to releasably lock with the catheter when the catheter is received in the working channel.

13. A method of delivering a catheter device to an internal body site, comprising:

advancing an anchor sleeve through a percutaneous opening so that one or more subcutaneous anchor tines are disposed adjacent to a subcutaneous region;

advancing a catheter device though a working channel of the anchor sleeve and toward a targeted body site, the catheter device defining at least one lumen that extends to a catheter tip;

operating a first actuator to deploy the subcutaneous anchor tines into the subcutaneous region; and

operating a second actuator to urge a locking device releasably lock with the catheter when the catheter is received in the working channel.

14. The method of claim 13, wherein the anchor sleeve is releasably secured to a skin region proximate the percutaneous opening when the subcutaneous anchor tines are deployed into the subcutaneous region.

15. The method of claim 14, wherein the subcutaneous anchor tines are retracted into an internal space of the anchor sleeve when the anchor sleeve is advanced through the percutaneous opening.

16. The method of claim 15, wherein the subcutaneous anchor tines exhibit superelastic characteristics to flexibly adjust to a deployed orientation when the first actuator is operated to deploy the subcutaneous anchor tines into the subcutaneous region.

17. The method of claim 13, wherein operating the first actuator comprises moving a slider device that reciprocates in a direction substantially parallel to a longitudinal axis of the anchor sleeve.

18. The method of claim 17, wherein operating the second actuator comprises moving a twist device that at least partially rotates about the longitudinal axis of the anchor sleeve.

19. The method of claim 13, wherein the first actuator is operated to deploy the subcutaneous anchor tines into the subcutaneous region by application of a first user-applied force, and the second actuator is operated to urge the locking device to releasably lock with the catheter by application of a second user-applied force, the first user-applied force being isolated from the second user-applied force.

20. The method of claim 13, wherein the locking device releasably locks with the catheter by compressing at least a portion of an outer surface of the catheter when the catheter is received in the working channel.