Subcutaneous anchor device for securing a catheter
Some embodiments of a medical device anchor system include an anchor device that receives a medical instrument (such as a catheter or the like) and secures the instrument in place relative to a skin penetration point. In some circumstances, the anchor device may allow the anchor device to be used after medical instrument is already in place without the need for a second penetration point for the anchor device.
1 . An anchor system for securing a catheter relative to a skin penetration point, comprising:
an anchor device including a main body and a retention cap to removably connect with the main body, the anchor device releasably attachable to an outer surface of a catheter when the catheter is occupying the skin penetration point, the retention cap being adjustable relative to the main body between an engaged configuration in which the catheter is frictionally secured to the anchor device and a released configuration in which the catheter is movable relative to the anchor device; and
a first anchor and a second anchor coupled to the main body and extending distally from a distal end of the main body, the first anchor comprising a first subcutaneous flexible tine and the second anchor comprising a second subcutaneous flexible tine, the first subcutaneous flexible tine and the second subcutaneous flexible tine being insertable into a subcutaneous region adjacent to a skin layer to anchor the main body relative to the skin penetration point, wherein the first anchor and the second anchor are insertable through the skin penetration point occupied by the catheter while the main body resides fully external to the skin penetration point, and wherein the first anchor and the second anchor are adjustable from a first configuration to a deployed configuration in which the first and second subcutaneous flexible tines extend outwardly away from one another.
2 . The anchor system of claim 1 , wherein the retention cap at least partially defines a channel configured to abut with the outer surface of the catheter when the retention cap is in the engaged configuration relative to the main body.
3 . The anchor system of claim 2 , wherein the retention cap includes first and second apertures positioned on opposing sides of the channel.
4 . The anchor system of claim 3 , wherein the main body includes first and second extensions configured to mate with the first and second apertures, respectively, of the retention cap.
5 . The anchor system of claim 4 , wherein the first aperture of the retention cap is separable from the first extension of the main body while the second aperture remains mated with the second extension of the main body.
6 . The anchor system of claim 5 , wherein the anchor device is maintained in the engaged configuration when the first and second apertures of the retention cap are mated with the first and second extensions of the main body.
7 . The anchor system of claim 1 , wherein the first anchor and the second anchor extend distally from the distal end of the main body in a longitudinal direction, and at least a portion of the anchor device comprises a longitudinal fold line parallel to the longitudinal direction.
8 . The anchor system of claim 7 , wherein the first anchor extends distally from the distal end of the main body on a first side of a longitudinal plane along the longitudinal fold line, and the second anchor extends distally from the distal end of the main body on a second side of the longitudinal plane opposite from the first side.
9 . The anchor system of claim 1 , wherein the first anchor includes a first longitudinal shaft portion extending in a longitudinal direction distally away from the distal end of the main body toward the first subcutaneous flexible tine, and wherein the second anchor includes a second longitudinal shaft portion extending in the longitudinal direction distally away from the distal end of the main body toward the second subcutaneous flexible tine.
10 . The anchor system of claim 9 , wherein the first longitudinal shaft portion of the first anchor and the second longitudinal shaft portion of the second anchor extend generally parallel to one another and generally side-by-side to one another.
11 . The anchor system of claim 10 , wherein the first subcutaneous flexible tine and the second subcutaneous flexible tine are insertable into the subcutaneous region adjacent to the skin layer while at least a majority of the first and second longitudinal shaft portions reside external to the skin penetration point.
12 . The anchor system of claim 1 , further comprising the catheter.
13 . The anchor system of claim 1 , wherein a position of the first anchor relative to the second anchor is adjustable during removal of the first anchor and the second anchor from the subcutaneous region.
14 . The anchor system of claim 1 , wherein each of the first subcutaneous flexible tine and the second subcutaneous flexible tine is a curved tine having a convexly curved portion that extends toward a non-sharp free end.
15 . The anchor system of claim 14 , wherein each of the first subcutaneous flexible tine and the second subcutaneous flexible tine comprise a nitinol material.