CATHETER SHEATH INTRODUCER WITH DIRECTIONAL RETENTION DAMPER

• US 20140194822A1
• Filed: 01/08/2013
• Published: 07/10/2014
• Est. Priority Date: 01/08/2013
• Status: Active Grant

• Current Assignee: Biosense Webster Israel Ltd. (Johnson & Johnson)
• Original Assignee: Biosense Webster Israel Ltd. (Johnson & Johnson)
• Inventors: Wu, Steven
• Granted Patent: US 10,039,898 B2
• Time in Patent Office: Days
• US Class Current: 604/171
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 2017/00858 high friction or non-slip
• CPC Class Codes: A61B 2017/3441 with distal sealing means
• CPC Class Codes: A61B 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61M 2025/0062 having features to improve the sliding of one part within another by using lubricants or surfaces with low friction
• CPC Class Codes: A61M 2025/09125 Device for locking a guide wire in a fixed position with respect to the catheter or the human body
• CPC Class Codes: A61M 25/0023 by the form of the lumen, e.g. cross-section, variable diameter
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/0075 Valve means
• CPC Class Codes: A61M 25/0105 Steering means as part of the catheter or advancing means; Markers for positioning systems for detection of markers A61B
• CPC Class Codes: A61M 25/0662 Guide tubes

Abstract

A catheter sheath introducer comprises a hub and a tubular sheath having an inner lining with one or more dampers to improve retention of medical devices received or passed through the sheath without significantly increasing the force required to advance the medical device through the sheath. The dampers are made of a friction inducing material, for example, rubber-based materials, and configured as fingers, bumps or flaps that are unidirectional by means of an asymmetrical shape relative to a longitudinal axis of the sheath.

Claims

1. A catheter sheath introducer adapted for use with a medical device, comprising:

a hub;

an elongated sheath comprising a tubular structure with a distal end and a proximal end, the tubular structure having at least one layer with an inner circumferential surface defining a lumen, the hub connected to the connected to the proximal end of the sheath; and

one or more dampers extending inwardly from the inner circumferential surface, the one or more dampers each having a unidirectional configuration;

wherein the dampers are configured to contact and apply a retention force on the medical device received in the lumen of the sheath.

4. The catheter sheath introducer of claim 1, wherein the one or more dampers are angled distally.

5. The catheter sheath introducer of claim 1, wherein the one or more dampers are configured as fingers.

6. The catheter sheath introducer of claim 1, wherein the one or more dampers are configured as bumps.

7. The catheter sheath introducer of claim 1, wherein a plurality of the one or more dampers ranges between about two and six.

8. The catheter sheath introducer of claim 1, wherein the one or more dampers are arranged in diametrically opposing pairs in the lumen of the tubular structure.

9. The catheter sheath introducer of claim 8, wherein distal ends of at least one pair of dampers are in contact with each other when the medical device is out of contact with the dampers.

10. The catheter sheath introducer of claim 1, wherein a distal end of at least one damper is in contact with at least one other damper when the medical device is out of contact with the dampers.

11. The catheter sheath introducer of claim 1, wherein distal ends of the one or more dampers are out of contact with each other when the medical device is out of contact with the dampers.

12. The catheter of claim 1, wherein each damper has at least one edge whose inner angle with the inner surface toward the distal end of the tubular structure is less than about 90 degrees.

2. The catheter sheath introducer of claim 2, wherein the one or more dampers are constructed of a rubber-based material.

3. The catheter sheath introducer of claim 2, wherein the one or more dampers are formed from the at least one layer of the tubular structure.