Systems and methods for anchoring medical devices
Some embodiments of a medical device anchor system include an anchor device that secures a medical instrument (such as a catheter or the like) in place relative to a skin penetration point using subcutaneous anchors.
1. An anchor device for securing the position of a medical instrument, the anchor device comprising:
a retainer body comprising a first body portion that includes a first tab and a second body portion that includes a second tab; and
first and second anchors that extend distally from a distal end of the retainer body, each anchor comprising a flexible tine that is deployable in a subcutaneous region to secure the retainer body relative to a penetration point, the first anchor being coupled to the first body portion and the second anchor being coupled to the second body portion,
wherein the first body portion of the retainer body is adjustable relative to the second body portion so that the first and second anchors are adjustable from a first configuration to a second configuration; and
wherein the first tab of the first body portion and the second tab of the second body portions define a cutout region therebetween at a proximal end opposite from the first and second anchors in the first configuration to provide visualization and access to a surface under the retainer body, and the first tab of the first body portion is adjacent to the second tab of the second body in the second configuration.
2. The anchor device of claim 1 , wherein the first tab is symmetrical with the second tab.
3. The anchor device of claim 1 , wherein the cutout region defined by the first and second tabs is a U-shaped cutout region.
4. The anchor device of claim 1 , wherein the first body portion is pivotably coupled to the second body portion about a longitudinal fold axis.
5. The anchor device of claim 4 , wherein the first body portion of the retainer body is pivotable relative to the second body portion about the longitudinal fold axis so that the first and second anchors are adjustable from a first configuration in which the flexible tines extend outwardly away from one another to a second configuration in which the flexible tines extend generally in a same direction.
6. The anchor device of claim 5 , wherein the retainer body comprises one or more anchor engagement portions configured to releasably receive one or more corresponding apertures defined by a hub of a catheter.
7. The anchor device of claim 6 , wherein the one or more anchor engagement portions comprise one or more retention posts that extend upwardly from the retainer body.
8. The anchor device of claim 7 , wherein the one or more retention posts extend from the retainer body at an angle that is generally transverse to the longitudinal fold axis.
9. The anchor device of claim 8 , wherein the one or more retention posts are positioned along a perimeter of the retainer body.
10. The anchor device of claim 9 , wherein the one or more retention posts comprise a first retention post extending upwardly from the retainer body on a first side of the longitudinal fold axis and a second retention post extending upwardly from the retainer body on a second side of the longitudinal fold axis.
11. The anchor device of claim 1 , wherein the retainer body comprises a flexible web portion positioned generally centrally between the first and second body portions and extending longitudinally from the distal end of the retainer body to a proximal face of the retainer body, wherein the flexible web portion defines a longitudinal fold axis.
12. The anchor device of claim 11 , wherein the flexible tines of the first and second anchors have a convex curvature facing towards the body portions.
13. The anchor device of claim 1 , wherein the retainer body comprises a sloped nose region having a generally planar upper surface that is oriented at a decline angle extending distally from generally planar surfaces of the first and second body portions.
14. A system for securing the position of a medical instrument, the system comprising:
an adapter including: a hub portion that is elastically deformable and configured to substantially surround and releasably engage with an outer surface of a medical instrument, and a second portion having one or more engagement members; and
an anchor device comprising:
a retainer body comprising a first body portion that includes a first tab and a second body portion that includes a second tab, and one or more anchor engagement portions configured to releasably couple with the one or more engagement members of the hub portion; and
first and second anchors that extend distally from a distal end of the retainer body, each anchor comprising a flexible tine that is deployable in a subcutaneous region to secure the retainer body relative to a penetration point, the first anchor being coupled to the first body portion and the second anchor being coupled to the second body portion,
wherein the first body portion of the retainer body is adjustable relative to the second body portion so that the first and second anchors are adjustable from a first configuration to a second configuration; and
wherein the first tab of the first body portion and the second tab of the second body portions define a cutout region therebetween at a proximal end opposite from the first and second anchors in the first configuration to provide visualization and access to a surface under the retainer body, and the first tab of the first body portion is adjacent to the second tab of the second body in the second configuration.
15. The system of claim 14 , wherein the hub portion of the adapter comprises a longitudinal slit that is configured to open to receive a portion of the medical instrument.
16. The system of claim 15 , wherein the hub is configured to be tilted relative to the anchor device when the anchor engagement portions of the retainer body are engaged with the engagement members of the hub.
17. The system of claim 14 , wherein the first tab is symmetrical with the second tab.
18. The system of claim 17 , wherein the cutout region defined by the first and second tabs is a U-shaped cutout region.
19. The system of claim 18 , wherein the first body portion is pivotably coupled to the second body portion about a longitudinal fold axis.
20. The system of claim 19 , wherein the retainer body further comprises a sloped nose region having a generally planar upper surface that is oriented at a decline angle extending distally from generally planar surfaces of the first and second body portions.