Anchor instrumentation and methods
Some embodiments of a medical device anchor system includes an anchor sleeve and a catheter (or other medical instrument) to advance though a working channel of the anchor sleeve. The anchor sleeve may have a subcutaneous cuff device arranged along an outer surface. In such circumstances, the embedded cuff device can inhibit the migration of infection from outside the skin and into the blood stream.
1 . A method, comprising:
advancing flexible anchors of a catheter anchor device through a percutaneous opening in a skin layer so that the flexible anchors and a subcutaneous cuff device of the catheter anchor device are disposed in a subcutaneous region along an underside of the skin layer, the subcutaneous cuff device comprising a biocompatible material configured to receive tissue ingrowth when disposed in the subcutaneous region along the underside of the skin layer, wherein the subcutaneous cuff device is positioned closer to a distal end of the catheter anchor device than to a proximal end of the catheter anchor device and distal of the flexible anchors;
moving a catheter through the percutaneous opening in the skin layer toward a targeted body site such that a distal tip of the catheter is moved relative to the subcutaneous cuff device disposed in the subcutaneous region along the underside of the skin layer; and
adjusting an actuator of the catheter anchor device relative to the subcutaneous cuff device between (i) a first position in which the flexible anchors are deployed to anchor the catheter anchor device in the subcutaneous region and (ii) a second position in which the flexible anchors are undeployed and retracted into the catheter anchor device, the flexible anchors located closer to the actuator than to the subcutaneous cuff device when deployed, wherein a distance between the actuator and the subcutaneous cuff device along a longitudinal axis of the catheter anchor device is greater in the first position than in the second position.
2 . The method of claim 1 , wherein after said moving the catheter toward the targeted body site, a distal length of the catheter extending distally from the distal end of the catheter anchor device is greater than a maximum length of the catheter anchor device.
3 . The method of claim 2 , wherein a longitudinal distance from the subcutaneous cuff device to the distal tip of the catheter defines a cuff-to-tip distance, and wherein said moving causes adjustment of the cuff-to-tip distance while the subcutaneous cuff device is disposed in the subcutaneous region along the underside of the skin layer.
4 . The method of claim 3 , wherein the cuff-to-tip distance between the subcutaneous cuff device and the distal tip of the catheter is manually selectable.
5 . The method of claim 4 , further comprising releasably securing the catheter to the catheter anchor device after the adjustment of the cuff-to-tip distance.
6 . The method of claim 1 , wherein after said moving the catheter toward the targeted body site, the distal end of the catheter anchor device resides external to a venous entry point of a blood vessel that is occupied by the catheter.
7 . The method of claim 1 , wherein the flexible anchors are adjustable from a non-deployed orientation to a deployed orientation in the subcutaneous region along the underside of the skin layer.
8 . The method of claim 1 , wherein the catheter anchor device comprises a sleeve body having a lumen configured to receive the catheter, and wherein the subcutaneous cuff device is mounted along an exterior of the sleeve body.
9 . The method of claim 1 , wherein a distance between the actuator and the flexible anchors when in the first position is less than a distance between the subcutaneous cuff device and the distal end of the catheter anchor device.
10 . The method of claim 1 , wherein the catheter anchor device has a tapered region that tapers towards the distal end.
11 . The method of claim 10 , wherein the subcutaneous cuff device is located on the tapered region of the catheter anchor device.
12 . The method of claim 1 , wherein the subcutaneous cuff device is mounted to a catheter engagement body of the catheter anchor device at a position such that the subcutaneous cuff device is configured to reside in the subcutaneous region along the underside of the skin layer while at least a proximal portion of the catheter engagement body resides external to the skin layer.
13 . The method of claim 12 , wherein the catheter engagement body comprises a sleeve body having a lumen to receive the catheter.
14 . The method of claim 1 , wherein the actuator adjusts from the first position to the second position so as to simultaneously deploy the flexible anchors and to shift an interior gripper of the catheter anchor device to compress an outer surface of the catheter.
15 . The method of claim 1 , wherein the subcutaneous cuff device inhibits migration of infection when the subcutaneous cuff device is embedded in the subcutaneous region along the underside of the skin layer.
16 . The method of claim 15 , wherein the subcutaneous cuff device is configured to receive the tissue ingrowth of bodily tissue over a period of time so as to inhibit migration of infection from outside the skin and into a blood stream.
17 . The method of claim 1 , wherein the catheter anchor device includes an interior gripper that is adjustable to frictionally engage at least a portion of an outer circumferential surface of the catheter.
18 . The method of claim 1 , further comprising releasably securing the catheter to the catheter anchor device by shifting a gripper portion to releasably compress against an outer circumferential surface of the catheter after each of the catheter and the flexible anchors are inserted through the percutaneous opening in the skin layer.
19 . The method of claim 1 , wherein the actuator in the second position contacts a stopper of the catheter anchor device, the stopper located closer to the actuator than to the subcutaneous cuff device.
20 . A method, comprising:
advancing a first flexible anchor and a second flexible anchor of a catheter anchor device through a percutaneous opening in a skin layer so that the first and second flexible anchors and a subcutaneous cuff device of the catheter anchor device are disposed in a subcutaneous region along an underside of the skin layer, the subcutaneous cuff device comprising a biocompatible material configured to receive tissue ingrowth when disposed in the subcutaneous region along the underside of the skin layer, wherein the subcutaneous cuff device is positioned closer to a distal end of the catheter anchor device than to a proximal end of the catheter anchor device and distal of the first and second flexible anchors;
moving a catheter through the percutaneous opening in the skin layer toward a targeted body site such that a distal tip of the catheter is moved relative to the subcutaneous cuff device disposed in the subcutaneous region along the underside of the skin layer; and
adjusting an actuator of the catheter anchor device relative to the subcutaneous cuff device and along a longitudinal axis defined between the distal end and the proximal end of the catheter anchor device, such that the actuator linearly translates between a first position and a second position to shift the first and second flexible anchors to a deployed configuration, wherein the actuator is spaced apart from the first and second flexible anchors along the longitudinal axis in the first position and the second position.