# US 2014/0194822 A1 · Catheter sheath introducer with directional retention damper

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- Number: US 2014/0194822 A1
- Document ID: US20140194822A1
- Status: Published application
- Kind: A1
- Application number: 13/736,919
- Filed: 2013-01-08
- Published: 2014-07-10
- Earliest claimed: 2013-01-08
- Assignees: Biosense Webster (Israel) Ltd.
- Applicants: Biosense Webster (Israel), Ltd.
- Inventors: Steven Wu
- Web page: https://patentgrep.com/patent/US20140194822A1

## CPC

- A61M 25/0023: {by the form of the lumen, e.g. cross-section, variable diameter}
- 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)}
- A61M 25/0068: {Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure}
- A61M 25/0074: {Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable}
- A61M 25/0105: {Steering means as part of the catheter or advancing means; Markers for positioning (systems for detection of markers A61B)}
- A61M 25/0662: {Guide tubes}
- A61B 2017/00858: {high friction or non-slip}
- A61B 2017/3441: {with distal sealing means}
- A61B 2017/347: {Locking means, e.g. for locking instrument in cannula}
- A61M 25/0075: {Valve means}
- A61M 2025/0062: {having features to improve the sliding of one part within another by using lubricants or surfaces with low friction}
- A61M 2025/09125: {Device for locking a guide wire in a fixed position with respect to the catheter or the human body}
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## 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

### Claim 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.

### Claim 2 (depends on 2)

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

### Claim 3 (depends on 2)

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.

### Claim 4 (depends on 1)

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

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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

### Claim 8 (depends on 1)

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.

### Claim 9 (depends on 8)

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.

### Claim 10 (depends on 1)

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.

### Claim 11 (depends on 1)

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.

### Claim 12 (depends on 1)

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.