ANESTHESIA CONDUCTION CATHETER FOR DELIVERY OF ELECTRICAL STIMULUS

• US 20100318095A1
• Filed: 06/22/2010
• Published: 12/16/2010
• Est. Priority Date: 03/24/2000
• Status: Abandoned Application

• Current Assignee: Micor Inc.
• Original Assignee: SAFE bt Inc (B. Braun Holding GmbH & Co. KG)
• Inventors: BRUSHEY, Stephen
• Application Number:
  US12/820,559
• Publication Number:
  US 20100318095A1
• Time in Patent Office: Days
• US Class Current: 606/108
• CPC Class Codes: A61M 19/00 Local anaesthesia syringes therefor A61M5/00; Hypothermia A61M5/42 takes precedence; cooling blood in a bypass of the arterial system A61M1/36
• CPC Class Codes: A61M 2025/0007 Epidural catheters
• CPC Class Codes: A61M 2025/0042 Microcatheters, cannula or the like having outside diameters around 1 mm or less
• CPC Class Codes: A61M 2025/0057 Catheters delivering medicament other than through a conventional lumen, e.g. porous walls or hydrogel coatings
• CPC Class Codes: A61M 2025/0063 having means, e.g. stylets, mandrils, rods or wires to reinforce or adjust temporarily the stiffness, column strength or pushability of catheters which are already inserted into the human body
• CPC Class Codes: A61M 25/001 Forming the tip of a catheter, e.g. bevelling process, join or taper
• CPC Class Codes: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids
• CPC Class Codes: A61M 25/0053 having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
• CPC Class Codes: A61M 25/01 Introducing, guiding, advancing, emplacing or holding catheters A61M25/10 takes precedence
• CPC Class Codes: A61N 1/0551 Spinal or peripheral nerve electrodes

Abstract

A catheter is comprised of a flexible cylindrical tube defining a proximal portion and a distal portion terminating in a distal tip. The tube has a plurality of openings formed therethrough to form a diffusion area. The catheter includes a conductive end cap enclosing a distal tip. A flexible conductive member is attached to the conductive end cap and extends to the proximal portion where it is attached to the inside diameter of the flexible tube. The member is movable within the tube.

Claims

1-53. -53. (canceled)

54. A system, comprising:

a catheter comprising;

a flexible cylindrical tube defining a proximal portion and a distal portion terminating in a distal tip, said tube having a plurality of openings formed therethrough;

a conductive end cap closing said distal tip; and

a flexible conductive member attached at one end to said conductive end cap and at another end to said proximal portion so as to be movable within said tube;

a needle;

a flexible delivery sheath carrying said catheter;

an electrical connector; and

a removable stylet, a portion of said stylet disposed within said catheter, and an end portion of said stylet opposite the portion disposed within said catheter connected to said electrical connector.

55. A system, comprising:

a catheter comprising;

a flexible cylindrical tube defining a proximal portion and a distal portion, said tube having a plurality of openings formed therethrough and having a closed end; and

a flexible coil attached to an inside surface of said tube at said proximal and said distal portion so as to form an annular area between an outside diameter of said coil and said inside diameter of said tube, said coil having adjacent turns spaced to enable fluid to leak into said annular area;

a needle;

a flexible delivery sheath carrying said catheter;

an electrical connector; and

a removable stylet, a portion of said stylet disposed within said catheter, and an end portion of said stylet opposite the portion disposed within said catheter connected to said electrical connector.

56. A system, comprising:

a catheter comprising;

a flexible cylindrical tube defining a proximal portion and a distal portion, said tube having a plurality of openings formed therethrough and a distal tip;

a conductive end cap closing said distal tip; and

a flexible conductive coil attached to said conductive end rep and to an inside diameter of said tube at said proximal portion so as to form an annular area between an outside diameter of said coil and said inside diameter of said tube, said coil having adjacent turns spaced to enable fluid to leak into said annular area;

a needle;

a flexible delivery sheath carrying said catheter;

an electrical connector; and

a removable stylet, a portion of said stylet disposed within said catheter, and an end portion of said stylet opposite the portion carricd disposed within said catheter connected to said electrical connector.

57. A method of placing a stimulating catheter, comprising:

inserting a needle into a patient;

applying an electrical stimulus to said needle;

feeding a stimulating catheter having a stylet extending thereinto, into said needle, said stylet being in electrical communication with said catheter;

applying an electrical stimulus to said stylet; and

removing said stylet from said catheter.

58. A restimulating device, comprising:

a stylet; and

an electrical connector having one end adapted for connection with a source of electrical stimulus and another end connected to said stylet.

59. A method of verifying the placement of a stimulating catheter, comprising:

inserting a stylet into a catheter through a connector connected to one end of said catheter, said catheter of the type having a conductive member running substantially the length of the catheter;

such that the stylet electrically contacts the conductive membrane and

applying an electrical stimulus to said stylet.