# US 10,307,571 B2 · Bi-directional cannula feature capture mechanism

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- Number: US 10,307,571 B2
- Document ID: US10307571B2
- Status: Granted
- Kind: B2
- Application number: 15/216,313
- Filed: 2016-07-21
- Published: 2016-11-10
- Granted: 2019-06-04
- Earliest claimed: 2013-07-11
- Assignees: Becton, Dickinson and Company
- Applicants: Becton, Dickinson and Company
- Inventors: Jonathan Karl Burkholz
- Web page: https://patentgrep.com/patent/US10307571B2

## CPC

- A61M 25/0631: {having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle}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 25/0606: {"Over-the-needle" catheter assemblies, e.g. I.V. catheters}
- A61M 25/0618: {having means for protecting only the distal tip of the needle, e.g. a needle guard}
- A61M 39/10: Tube connectors or tube couplings
- A61M 25/0693: {Flashback chambers}
- A61M 2039/1077: {Adapters, e.g. couplings adapting a connector to one or several other connectors}
- 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

A bi-directional cannula feature capture mechanism is described herein. Generally, the capture mechanism comprises an inner housing, an outer housing, and a cannula. The inner housing comprises a proximal and a distal cannula feature mating component. The outer housing is adapted to slidably receive the inner housing in a proximal direction. Additionally, the cannula extends through the inner housing and the cannula's feature has a proximal engagement and a distal engagement. The proximal and distal engagements are respectively configured to irreversibly engage the proximal and distal cannula feature mating components when the cannula tip is moved into a shielded position.

## Claims

### Claim 1

A catheter device, comprising:
a bi-directional cannula feature capture mechanism comprising:
an inner housing, wherein the inner housing comprises an elastomeric material, wherein the inner housing comprises a proximal cannula feature mating component and a distal cannula feature mating component;
a catheter adapter;
an outer housing, wherein the outer housing comprises a material that is less flexible than the elastomeric material, wherein an inner surface of the outer housing comprises at least one proximally-facing barb that gouges into the elastomeric material of the inner housing to thereby prevent the inner housing from translating distally through the outer housing while allowing the inner housing to translate proximally through the outer housing; and
a cannula that extends into the inner housing, wherein the cannula comprises a distal tip and a cannula feature, wherein the cannula feature comprises a proximal engagement surface and a distal engagement surface, wherein when the cannula is retracted proximally within the inner housing, the proximal engagement surface contacts the proximal cannula feature to prevent the cannula feature from moving proximally out of the bi-directional cannula feature capture mechanism and the distal cannula feature mating component prevents the distal tip from moving distally out of the bi-directional cannula feature capture mechanism, thereby shielding the distal tip within the bi-directional cannula feature capture mechanism.

### Claim 2 (depends on 1)

The catheter device of claim 1, wherein the distal cannula feature mating component contacts the distal engagement surface to prevent the distal tip from moving distally out of the bi-directional cannula feature capture mechanism.

### Claim 3 (depends on 1)

The catheter device of claim 1, wherein the distal cannula feature mating component contacts the distal tip to prevent the distal tip from moving distally out of the bi-directional cannula feature capture mechanism.

### Claim 4 (depends on 1)

The catheter device of claim 1, wherein, when the proximal engagement surface contacts the proximal cannula feature, the inner housing is positioned proximal to the at least one proximally-facing barb.

### Claim 5 (depends on 4)

The catheter device of claim 4, wherein the material that is less flexible than the elastomeric material comprises metal.

### Claim 6 (depends on 1)

The catheter device of claim 1, wherein the inner housing forms a needle port through which the cannula extends, the needle port also being formed of the elastomeric material to thereby wipe blood from the cannula as the cannula moves proximally through the needle port.