# US 2022/0032008 A1 · Extended dwell and midline catheters and related methods

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- Number: US 2022/0032008 A1
- Document ID: US20220032008A1
- Status: Published application
- Kind: A1
- Application number: 17/296,912
- Filed: 2019-11-28
- Published: 2022-02-03
- Earliest claimed: 2018-11-28
- Assignees: B. Braun Melsungen AG
- Applicants: B. Braun Melsungen AG
- Inventors: Teng Lip Khoo; Lilian Zhi Ling Lew
- Web page: https://patentgrep.com/patent/US20220032008A1

## CPC

- A61M 25/0113: {Mechanical advancing means, e.g. catheter dispensers}
- A61M 25/0014: {Connecting a tube to a hub}
- A61M 25/0606: {"Over-the-needle" catheter assemblies, e.g. I.V. catheters}
- A61M 25/09041: {Mechanisms for insertion of guide wires}
- A61M 25/0618: {having means for protecting only the distal tip of the needle, e.g. a needle guard}
- 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)}

## Abstract

Extended dwell catheter assembly allows for one-handed operation by a physician such that the physician may continue to operate a visualization tool with the other hand throughout the catheterization process using the extended dwell catheter assembly. The catheter assembly can have stacked push tags to prevent false activations and to provide a manipulation means in the correct order of actuation.

## Claims

### Claim at position 1

1-15. (canceled)

### Claim 16

A catheter assembly comprising:
a housing having spaced apart walls;
a catheter hub located within the housing;
a catheter tube coupled to the catheter hub, the catheter tube defining a catheter axis;
a needle projecting through the catheter tube; and
a catheter activation device comprising a first push tag having a surface for pushing to move the catheter hub relative to the housing and a second push tag having a surface for pushing to move the catheter hub relative to the housing,
wherein the first and second push tags are movable with one another to move the catheter hub from a first position to a second position within the housing and the first and second push tags are movable relative to one another for moving the catheter hub from the second position to a third position; and
wherein the first and second push tags are spaced from one another a first distance in the first position and are spaced from one another a second distance in the second position, which is less than the first distance.

### Claim 17 (depends on 16)

The catheter assembly of claim 16, wherein the surface of the second push tag is obscured by the housing in a ready to use state.

### Claim 18 (depends on 17)

The catheter assembly of claim 17, wherein a cover attached to the housing obscures the surface of the second push tag.

### Claim 19 (depends on 16)

The catheter assembly of claim 16, further comprising:
a guidewire projecting through the needle; and
a guidewire push tag slidably mounted within the housing for moving the guidewire relative to the needle.

### Claim 20 (depends on 19)

The catheter assembly of claim 19, wherein the second push tag is covered by a cover attached to the housing, the cover comprising a surface that covers the second push tag such that the second push tag is not accessible until after activation of the first push tag.

### Claim 21 (depends on 19)

The catheter assembly of claim 19, wherein the second push tag is slidably coupled to the first push tag to move with the first push tag and slidable relative to the first push tag.

### Claim 22 (depends on 19)

The catheter assembly of claim 19, wherein the first push tag, the guidewire push tag, and the second push tag are stacked within the housing such that only the guidewire push tag is accessible by a user in the ready to use state.

### Claim 23 (depends on 16)

The catheter assembly of any preceding claim 16, further comprising a support piece pivotably connected to the housing.

### Claim 24 (depends on 23)

The catheter assembly of claim 23, wherein the support piece is deflectable by the guidewire push tag.

### Claim 25 (depends on 23)

The catheter assembly of claim 23, wherein the support piece comprises two mounting arms defining a rotational axis.

### Claim 26

A method of assembling a catheter assembly, the method comprising:
assembling a catheter activation device comprising a first push tag having a surface and a second push tag having a surface to a housing, said housing having spaced apart sidewalls;
placing a catheter hub in sliding communication with the first push tag and the second push tag;
coupling a catheter tube to the catheter hub;
projecting a needle through the catheter tube; and
wherein the first push tag and the second push tag are movable with one another to move the catheter hub from a first position to a second position and the first push tag and the second push tag are movable relative to one another to move the catheter hub from the second position to a third position.

### Claim 27 (depends on 26)

The method of claim 26, further comprising:
projecting a guidewire through the needle;
mounting a guidewire push tag to the housing to move the guidewire relative to the housing.

### Claim 28 (depends on 26)

The method of claim 26, further comprising mounting the second push tag in sliding communication with groove rails located on sidewalls of the first push tag.

### Claim 29 (depends on 27)

The method of claim 27, further comprising mounting the second push tag in sliding communication with groove rails located on sidewalls of the first push tag.

### Claim 30 (depends on 28)

The method of claim 28, further comprising engaging rail protrusions of the second push tag with groove rails of the first push tag.

### Claim 31 (depends on 26)

The method of claim 26, further comprising mounting the needle to a retention block and projecting the guidewire through the retention block and through the needle.

### Claim 32 (depends on 30)

The method of claim 30, further comprising mounting the needle to a retention block and projecting the guidewire through the retention block and through the needle