System for anchoring medical devices
Some embodiments of a medical device anchor system include an anchor device that receives a catheter (or other medical instrument) and secures the catheter in place relative to a skin penetration point. In some embodiments, the anchor device can secure the catheter in an operative position relative to the skin without the use of sutures or skin tapes. In particular embodiments, the anchor device can be adjusted to a folded condition so that subcutaneous anchors are partially rotated prior to removal from the skin penetration point.
1. An anchor system for securing to a skin opening, comprising:
an anchor device configured to releasably secure to an external portion of a catheter while another portion of the catheter occupies a skin opening, the anchor device including:
a retainer base comprising a flexible hinge region that defines a central fold axis and has an upwardly facing channel to frictionally engage with the external portion of a catheter, and first and second subcutaneous anchors fixedly mounted on opposite sides of the central fold axis and extending distally from a distal end of the retainer base to anchor in the skin opening, each of the first and second subcutaneous anchors comprising: a longitudinal shaft portion that extends in a distal direction to a position that is distal of the distal end of the retainer base, and a flexible tine configured to deploy in a subcutaneous region to secure the retainer base relative to the skin opening;
a cap releasably mountable to the retainer base over the upwardly facing channel of the flexible hinge region so as to define a grip channel between the cap and the upwardly facing channel of the retainer base for frictional engagement with the external portion of the catheter
wherein each of the first and second subcutaneous anchors is pivotable about the central fold axis of the flexible hinge region so as to adjust both the flexible tine of the first subcutaneous anchor and the flexible tine of the second subcutaneous anchor from a deployed configuration to a removal configuration.
2. The anchor system of claim 1 , wherein the first and second subcutaneous anchors extend distally from the distal end of the retainer base such that the retainer base is arranged external to the skin opening when each flexible tine of the first and second subcutaneous anchors is deployed in the subcutaneous region.
3. The anchor system of claim 1 , wherein the first subcutaneous anchor is mounted with a first body portion of the retainer base and the second subcutaneous anchor is mounted with a second body portion of the retainer base, and the first body portion of the retainer base is pivotable about the central fold axis defined by the flexible hinge region relative to the second body portion of the retainer base while the first and second body portions remain physically coupled to one another.
4. The anchor system of claim 3 , wherein the first body portion and the second body portion of the retainer base are formed as a single component that is bendable along the central fold axis so as to pivot the first body portion relative to the second body portion.
5. The anchor system of claim 3 , wherein the flexible tines of the first and second subcutaneous anchors are rotated about 75-degrees to about 105-degrees when the first and second anchors are adjusted from the deployed configuration to the removal configuration.
6. The anchor system of claim 1 , wherein said one or more subcutaneous anchors comprise a metallic material.
7. The anchor system of claim 1 , wherein the flexible hinge region of the retainer base extends longitudinally for an entirety of the retainer base.
8. The anchor system of claim 1 , wherein each of the first and second subcutaneous anchors extends distally forward from the distal end of the retainer base in an amount sufficient to be insertable through the same skin opening occupied by the catheter when the retainer base releasably secures to the catheter.
9. The anchor system of claim 1 , wherein each of the first and second subcutaneous anchors comprises the longitudinal shaft portion and the flexible tine which extends outwardly away from the pivot axis toward a free end.
10. The anchor system of claim 9 , wherein the free end of each of the first and second subcutaneous anchors comprises a rounded dull tip.
11. The anchor system of claim 1 , wherein each of the upwardly facing channel of the flexible hinge portion and the cap include a complaint gripping surface configured to frictionally engage the external portion of the catheter in the channel.
12. The anchor system of claim 11 , wherein the cap includes first and second apertures that are configured to releasably mate with first and second upwardly extending tabs of the retainer base.
13. The anchor system of claim 12 , wherein when the cap is releasably mounted to the retainer base, the cap retains the first and second upwardly extending tabs of the retainer base so as to prevent adjustment of the flexible tine of the first subcutaneous anchor and the flexible tine of the second subcutaneous anchor from the deployed configuration to the removal configuration.
14. The anchor system of claim 1 , further comprising the catheter.
15. The anchor system of claim 14 , wherein the catheter has an exterior circumferential diameter sized to mate with the grip channel defined between the cap and the upwardly facing channel of the retainer base.