Body portal anchors and systems

• US 9,427,553 B2
• Filed: 04/28/2014
• Issued: 08/30/2016
• Est. Priority Date: 04/28/2010
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Nelson, Brian D.
• Primary Examiner(s): MEDWAY, SCOTT J
• Application Number:
  US14/263,515
• Publication Number:
  US 20140236091A1
• Time in Patent Office: 855 Days
• Field of Search: 604/164.01, 604/174, 604/175, 604/178, 604/288.02, 604/415, 604/48, 604/506, 604/510, 604/513, 604/533, 604/535, 604/65, 604/8, 606/129, 606/130, 607/115, 607/116, 607/139
• US Class Current: 1/1
• CPC Class Codes: A61M 2025/024 having a clip or clamp system
• CPC Class Codes: A61M 2025/0246 fixed on the skin having a cover for covering the holding means
• CPC Class Codes: A61M 2025/028 having a mainly rigid support structure
• CPC Class Codes: A61M 2039/0223 having means for anchoring the subcutaneous access site
• CPC Class Codes: A61M 2039/0229 having means for facilitating assembling, e.g. snap-fit housing or modular design
• CPC Class Codes: A61M 2039/0235 having an additional inlet, e.g. for a guidewire or a catheter tube
• CPC Class Codes: A61M 25/02 Holding devices, e.g. on the body
• CPC Class Codes: A61M 39/0208 Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276
• CPC Class Codes: A61M 39/1011 Locking means for securing connection; Additional tamper safeties A61M39/16 takes precedence
• CPC Class Codes: A61M 39/12 for joining a flexible tube to a rigid attachment
• CPC Class Codes: A61N 1/0539 Anchoring of brain electrode systems, e.g. within burr hole

Abstract

Anchors for securing a therapy device such as a therapy catheter relative to a burr hole, and systems and methods for using the same. Anchors in accordance with embodiments of the present disclosure may include a connector for securing the therapy catheter to a delivery catheter, wherein the connector is independently and removably attachable to the anchor. The connector may secure the therapy catheter relative to the burr hole and isolate forces that may otherwise tend to disrupt the placement of the therapy catheter.

Claims

1. An infusion system comprising:

a therapy catheter defining a lumen; and

a burr hole anchor comprising;

an annular base defining a central opening and an outer peripheral edge, the base operable to secure to bone surrounding a burr hole, wherein the base defines a catheter connection channel extending from the central opening outwardly through the peripheral edge, wherein the channel is at least partially defined by cinching surfaces configured to mechanically capture a terminal segment of the therapy catheter;

a tubular connector selectively insertable into the channel, wherein the connector comprises a therapy tip such that, when the connector is fully inserted into the channel, the therapy tip is received within the lumen of the therapy catheter; and

a retaining member positionable within an opening formed in the base, the opening intersecting the channel, wherein the retaining member is movable within the opening, while the connector is fully inserted into the channel, between;

a disengaged position, wherein the retaining member is spaced-apart from the connector; and

an engaged position, wherein the retaining member passes through the channel such that the retaining member contacts the connector and immobilizes the connector relative to the base.

2. The system of claim 1, wherein the base comprises a surface configured to limit insertion of the connector into the channel.

3. The system of claim 1, wherein the cinching surfaces mechanically capture the terminal segment of the therapy catheter at two discrete locations along the terminal segment.

4. The system of claim 1, further comprising a delivery catheter including a first end configured to attach to a delivery tip of the connector, and a second end configured to attach to a therapy source.

5. The system of claim 4, wherein the therapy source comprises an infusion pump.

6. A method for connecting an intra-cranial therapy catheter implanted in tissue to a delivery catheter, the method comprising:

attaching a base of a burr hole anchor to bone surrounding a burr hole;

positioning a terminal segment of the therapy catheter within a channel formed in the base;

inserting a connector into the channel until a therapy tip of the connector is located within a lumen of the therapy catheter; and

positioning a movable retaining member in an engaged position such that it contacts both the connector and the base to secure the connector relative to the base.

7. The method of claim 6, further comprising inserting a delivery tip of the connector into a lumen of the delivery catheter.

8. The method of claim 6, wherein positioning the retaining member comprises translating the retaining member within an opening of the base from a disengaged position to the engaged position.

9. The method of claim 6, further comprising trimming an excess length of the therapy catheter from the terminal segment while the terminal segment is positioned within the channel.

10. The method of claim 6, wherein inserting the connector into the channel comprises inserting the connector along a longitudinal axis of the channel.

11. The method of claim 10, further comprising limiting movement of the connector, while the connector is being inserted into the channel, to only movement along the longitudinal axis.

12. The method of claim 6, further comprising limiting rotational movement of the connector relative to the base when the retaining member is in the engaged position.