SYSTEM FOR ANCHORING MEDICAL DEVICES

• US 20100204656A1
• Filed: 02/06/2009
• Published: 08/12/2010
• Est. Priority Date: 02/06/2009
• Status: Active Grant

• Current Assignee: Interrad Medical, Inc.
• Original Assignee: Interrad Medical, Inc.
• Inventors: ROSENBERG, MICHAEL S., TAYLOR, KYLE P., FORSBERG, ANDREW T., CHRISTIANSON, MARK R.
• Granted Patent: US 8,328,764 B2
• Time in Patent Office: Days
• US Class Current: 604/174
• CPC Class Codes: A61M 2025/0233 specifically adapted for attaching to a body wall by means which are on both sides of the wall, e.g. for attaching to an abdominal wall
• CPC Class Codes: A61M 2025/028 having a mainly rigid support structure
• CPC Class Codes: A61M 2025/0286 anchored in the skin by suture or other skin penetrating devices
• CPC Class Codes: A61M 25/02 Holding devices, e.g. on the body
• 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 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.

Claims

1. An anchor device for securing the position of a catheter, comprising:

a retainer body to releasably couple to a catheter, the retainer body including a first body portion that is pivotably coupled to a second body portion; and

first and second anchors that extend distally from 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 pivotable relative to the second body portion so that the first and second anchors are adjustable from a deployed configuration in which the flexible tines extend generally away from one another to a removal configuration in which the flexible tines extend generally in the same direction.

2. The anchor device of claim 1, further comprising a cap that releasably couples with the retainer body so as to define a channel therebetween.

3. The anchor device of claim 2, wherein the retainer body and the cap each include a gripper member that frictionally engages the catheter in the channel when the retainer body releasably couples to the catheter.

4. The anchor device of claim 2, wherein the channel is at least partially defined by a wall comprising a silicone material to press against the catheter when the retainer body releasably couples to the catheter.

5. The anchor device of claim 2, further comprising a flexible sleeve to fit over a portion of the catheter that resides in the channel when the retainer body releasably couples to the catheter.

6. The anchor device of claim 1, wherein the first body portion and the second body portion of the retainer body are formed as a single component that is bendable along a longitudinal axis so as to pivot the first body portion relative to the second body portion.

7. The anchor device of claim 1, wherein the flexible tines of the first and second 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.

8. The anchor device of claim 1, wherein the first and second anchors that extend distally from the retainer body toward a portion of the catheter that passes through a skin penetration point when the retainer body releasably couples to the catheter.

9. The anchor device of claim 8, wherein the first and second first and second anchors that extend distally from the retainer body to deploy into the skin penetration point occupied by the catheter when the retainer body releasably couples to the catheter.

10. The anchor device of claim 1, wherein each of the first and second anchors comprises a metallic material that exhibits superelasticity when used in a human body.

11. The anchor device of claim 1, wherein the flexible tines of the first and second anchors comprise a flexible polymer material so that the tines flex against respective shafts of the first and second anchors during insertion without the use of a delivery tool.

12. An anchor system for securing the position of a medical instrument, comprising:

a delivery device to advance an anchor device toward a skin penetration point that is occupied by a medical instrument, the delivery device defining an internal space and a distal opening; and

the anchor device being deployable from the internal space of the delivery device and comprising;

a retainer base to releasably secure with the medical instrument, and one or more subcutaneous anchors that extend distally from the retainer base and toward the skin penetration point when the delivery device deploys the one or more subcutaneous anchors from the distal opening, each anchor comprising a tine that deploys in a subcutaneous region to secure the retainer base relative to the skin penetration point, wherein each tine is pivotable about a longitudinal axis from a deployed configuration to a removal configuration.

13. The anchor system of claim 12, wherein the retainer base is separable from the delivery device when the delivery device deploys the one or more subcutaneous anchors from the distal opening.

14. The anchor system of claim 12, wherein the one or more anchors extend distally from the retainer base such that the retainer base is arranged external to the skin penetration point when the tine is deployed in the subcutaneous region.

15. The anchor system of claim 12, wherein a first body portion of the retainer base is pivotable about a fold line relative to a second body portion of the retainer base, and the anchors comprise a first anchor coupled to the first body portion and a second anchor coupled to the second body portion.

16. The anchor system of claim 15, wherein the first body portion and the second body portion of the retainer base are formed as a single component that is bendable along a longitudinal axis so as to pivot the first body portion relative to the second body portion.

17. The anchor device of claim 15, wherein the flexible tines of the first and second 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.

18. The anchor system of claim 12, the one or more subcutaneous anchors comprise a metallic material that exhibits superelasticity when used in a human body.

19. The anchor system of claim 12, wherein the medical instrument comprises a catheter, further comprising a flexible sleeve to fit over a portion of the catheter when the retainer base releasably secures with the catheter.

20. A method of using a catheter anchor device, comprising:

advancing a catheter though a skin penetration point;

directing an anchor device toward the skin penetration point that is occupied by a portion of the catheter, the anchor device comprising;

a retainer body to releasably couple to an external portion of the catheter arranged outside the body, and first and second anchors extending distally from the retainer body;

inserting the first and second anchors through the skin penetration point that is occupied by the catheter so that at least a portion of the first and second anchors are deployed in a subcutaneous region proximate the skin penetration point;

securing the catheter with the retainer body so that the catheter is anchored relative to the skin penetration point;

pivoting the first and second anchors about a longitudinal fold line defined by the retainer body so that the first and second anchors are adjusted from a deployed configuration to a removal configuration; and

removing the first and second anchors from the subcutaneous region and the skin penetration point.