Systems and methods for variable injection flow

• US 10,285,748 B2
• Filed: 03/25/2016
• Issued: 05/14/2019
• Est. Priority Date: 10/28/2011
• Status: Active Grant

• Current Assignee: Medtronic CryoCath LP (Medtronic Plc)
• Original Assignee: Medtronic CryoCath LP (Medtronic Plc)
• Inventors: Groves, Regina E., Lalonde, Jean-Pierre, Laske, Timothy G., Lueckge, Claudia, Wittenberger, Dan, Sabbaghe-Kermani, Ramin, Kabir-Seraj, Mahmoud
• Primary Examiner(s): Hulbert, Amanda K
• Assistant Examiner(s): Edwards, Philip C
• Application Number:
  US15/081,373
• Publication Number:
  US 20160206360A1
• Time in Patent Office: 1,145 Days
• Field of Search: 606 21
• CPC Class Codes: A61B 18/02 by cooling, e.g. cryogenic techniques devices for cooling specific reflex points of the body within cell-life limits A61H39/06
• CPC Class Codes: A61B 18/0218 with open-end cryogenic probe, e.g. for spraying fluid directly on tissue or via a tissue-contacting porous tip
• CPC Class Codes: A61B 2018/00023 closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61B 2018/00095 high, i.e. heat conducting
• CPC Class Codes: A61B 2018/00101 low, i.e. thermally insulating
• CPC Class Codes: A61B 2018/00202 rotating
• CPC Class Codes: A61B 2018/0022 Balloons
• CPC Class Codes: A61B 2018/0212 using an instrument inserted into a body lumen, e.g. catheter
• CPC Class Codes: A61B 2018/0262 using a circulating cryogenic fluid
• CPC Class Codes: A61B 2018/0268 with restriction of flow
• CPC Class Codes: A61M 2025/0025 having a collapsible lumen
• CPC Class Codes: A61M 2025/0079 Separate user-activated means, e.g. guidewires, guide tubes, balloon catheters or sheaths, for sealing off an orifice, e.g. a lumen or side holes, of a catheter
• CPC Class Codes: A61M 2025/0175 having telescopic features, interengaging nestable members movable in relations to one another
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 39/22 Valves or arrangement of valves A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405
• CPC Class Codes: A61M 39/28 Clamping means for squeezing flexible tubes, e.g. roller clamps tube strippers A61M1/83
• CPC Class Codes: Y10T 137/0318 Processes

Abstract

Systems and methods for controllably variable fluid flow are disclosed that provide the ability to modify the effective cross-sectional area of the fluid delivery conduit available for fluid flow. Accordingly, selective control of these configurations allows fluid flow to be regulated as desired while the fluid delivery pressure remains the same. Additional configurations provided herein allow for the selective manipulation of a footprint or therapeutic pattern achievable with the medical device during a single procedure, negating the need for the removal and insertion of multiple devices to achieve the same variations in treatment geometry or characteristics.

Claims

1. A medical device comprising:

a catheter body defining a distal portion;

a fluid delivery conduit located within the catheter body and having an inner circumference; and

a fluid control element located within the fluid delivery conduit, the fluid control element having an outer surface and being rotatable within the fluid delivery conduit, the fluid control element being rotatable between a first rotational position and a second rotational position, the fluid control element being configured to contact less than an entirety of the inner circumference of the fluid delivery conduit to allow a flow of a fluid between at least a portion of the outer surface of the fluid control element and the inner circumference of the fluid delivery conduit when the fluid control element is in the first rotational position and to contact the entirety of the inner circumference of the fluid delivery conduit to obstruct the flow of the fluid when the fluid control element is in the second rotational position.

2. The medical device of claim 1, wherein rotation of the fluid control element selectively permits or obstructs the flow of the fluid within the fluid delivery conduit.

3. The medical device of claim 1, wherein the fluid control element is a valve.

4. The medical device of claim 1, wherein the fluid control element has a substantially circular cross section.

5. The medical device of claim 4, wherein the fluid control element includes a flange that is configured to contact less than the entirety the inner circumference of the fluid delivery conduit when the fluid control element is in the first rotational position and is configured to contact the entirety of the inner circumference of the fluid delivery conduit when the fluid control element is in the second rotational position.

6. The medical device of claim 5, wherein the fluid delivery conduit has a longitudinal axis, the flange lying in a plane that is substantially orthogonal to the longitudinal axis of the fluid delivery conduit when the fluid control element is in the second rotational position such that the fluid control element obstructs the flow of the fluid within the fluid delivery conduit.

7. The medical device of claim 6, wherein the flange lies in a plane that is substantially parallel to the longitudinal axis of the fluid delivery conduit when the fluid control element is in the first rotational position such that the fluid control element permits the flow of the fluid within the fluid delivery conduit.