# US 10,945,760 B2 · Cannulation device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,945,760 B2
- Document ID: US10945760B2
- Status: Granted
- Kind: B2
- Application number: 16/301,123
- Filed: 2017-04-21
- Published: 2019-07-25
- Granted: 2021-03-16
- Earliest claimed: 2016-06-10
- Assignees: Fresenius Kabi Deutschland GmbH
- Applicants: Fresenius Kabi Deutschland GmbH
- Inventors: Barbara Amon
- Web page: https://patentgrep.com/patent/US10945760B2

## CPC

- A61B 17/3421: {Cannulas}
- A61B 17/3415: {for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters (A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06)}
- A61B 17/3496: {Protecting sleeves or inner probes; Retractable tips (for protecting body piercing guide needles A61M25/0612)}
- A61M 25/0606: {"Over-the-needle" catheter assemblies, e.g. I.V. catheters}
- A61M 25/0631: {having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle}
- A61M 5/3243: {being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel (devices for protecting guide needles in combination with catheters A61M25/0612)}
- A61M 39/1011: {Locking means for securing connection; Additional tamper safeties (A61M39/16 takes precedence)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- 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

The invention relates to a cannulation device (1) for providing an access to a patient through a skin of the patient, comprising a puncture needle (11) with a needle tip (113) for puncturing the skin of the patient and a cannula (12). The cannulation device (1) is characterized in that the puncture needle (11) is movably connected to the cannula (12).

## Claims

### Claim 1

A cannulation device for providing an access to a patient through a skin of the patient, comprising a puncture needle with a needle tip for puncturing the skin of the patient and a cannula, the puncture needle being secured to a needle holder and the cannula being secured to a cannula holder so that the needle and the cannula extend along a longitudinal axis of the cannulation device, with the needle holder being movably mounted with respect to the cannula holder so that puncture needle is movable between a puncture position, in which the needle tip protrudes out of the cannula, and a safety position, in which the needle tip is arranged inside the cannula, the needle holder comprising a first connecting element and the cannula holder comprising spaced-apart second and third connecting elements arranged at a distance to each other along an axis that extends substantially parallel to the longitudinal axis, the first connecting element comprising a protrusion and each of the second and third connecting elements comprising a window sized to receive the protrusion, wherein the first connecting element of the needle holder and the second connecting element of the cannula holder are adapted to cooperate with each other such as to secure the needle holder with respect to the cannula holder, with the puncture needle in the safety position, and the first connecting element of the needle holder and the third connecting element of the cannula holder are adapted to cooperate with each other to secure the needle holder with respect to the cannula holder with the puncture needle in the puncture position.

### Claim 2 (depends on 1)

The cannulation device according to claim 1, wherein the puncture needle is arranged at least partially inside the cannula and wherein the puncture needle is movable inside the cannula along a longitudinal axis of the cannulation device.

### Claim 3 (depends on 1)

The cannulation device according to claim 1, wherein the first connecting element of the needle holder is brought out of engagement with the second connecting element of the cannula holder for moving the puncture needle out of the safety position into the puncture position by applying a force on the protrusion associated with the needle holder.

### Claim 4 (depends on 1)

The cannulation device according to claim 1, further comprising an elastically moveable release device that is adapted to engage the protrusion of the first connecting element of the needle holder to release the first connecting element out of engagement with the second connecting element of the cannula holder for moving the puncture needle out of the puncture position into the safety position.

### Claim 5 (depends on 4)

The cannulation device of claim 4, wherein the cannula holder comprises a side wall having a pair of spaced-apart grooves extending at an angle to a longitudinal axis defined by the cannulation device and the elastically movable release device comprises a protrusion positioned on the surface of the cannula holder side wall between the spaced-apart grooves.

### Claim 6 (depends on 1)

The cannulation device according to claim 1, further comprising an elastic element adapted to move the puncture needle from the puncture position into the safety position.

### Claim 7 (depends on 6)

The cannulation device according to claim 6, wherein the elastic element is out of an equilibrium configuration when the puncture needle is in the puncture position and in or closer to the equilibrium configuration when the puncture needle is in the safety position.

### Claim 8 (depends on 1)

The cannulation device according to claim 1, wherein the needle holder comprises a hollow channel that extends through the entire needle holder and in that the puncture needle is arranged in a part of the hollow channel.

### Claim 9 (depends on 8)

The cannulation device according to claim 8, wherein the needle holder comprises a valve that is arranged in the hollow channel that permits flow of insufflation through the hollow needle in a first direction and prevents the flow of insufflation gas through the needle in a second direction opposite to the first direction.

### Claim 10 (depends on 1)

The cannulation device according to claim 1, wherein the needle holder and the cannula holder form an assembly that is configured to be gripped and held by a user's hand.

### Claim 11 (depends on 1)

The cannulation device of claim 1, wherein the needle holder comprises a side wall with the protrusion defining the first connecting element formed thereon, the side wall being elastically bendable to permit the protrusion to move between the windows on the cannula holder defining the second and third connecting elements.

### Claim 12 (depends on 11)

The cannulation device of claim 11, wherein the side wall of the needle holder further comprises two longitudinally extending grooves that define an oblong section that supports the protrusion defining the first connecting element.