# US 11,305,093 B2 · Cannula

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

- Number: US 11,305,093 B2
- Document ID: US11305093B2
- Status: Granted
- Kind: B2
- Application number: 15/568,035
- Filed: 2016-04-21
- Published: 2018-04-26
- Granted: 2022-04-19
- Earliest claimed: 2015-04-21
- Assignees: Xenios AG
- Applicants: Xenios AG
- Inventors: Ivo Simundic
- Web page: https://patentgrep.com/patent/US11305093B2

## CPC

- A61M 25/0068: {Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure}
- A61M 1/3659: {Cannulae pertaining to extracorporeal circulation}
- A61M 25/007: {Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked}
- A61M 25/0075: {Valve means}
- A61M 5/3286: {Needle tip design, e.g. for improved penetration}
- A61M 2025/0073: {Tip designed for influencing the flow or the flow velocity of the fluid, e.g. inserts for twisted or vortex flow}
- 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 cannula comprising a tip and an outlet, the cannula having a reduction in the internal diameter, which reduction is designed as a conically tapering tip the end of which has a length that is shorter than the internal diameter of the adjoining portion of the cannula.

## Claims

### Claim 1

An arterial cannula comprising:
a tip;
an outlet;
a first cylindrical cannula section having a first internal diameter from 15 Fr to 19 Fr;
a second cylindrical cannula section having a second internal diameter from 13 Fr to 17 Fr;
a diameter reduction section forming a caliber narrowing transition between the first and second cylindrical cannula sections; and
a valve having at least one flap arranged in the diameter reduction section;
wherein the arterial cannula has an insertion length,
wherein the diameter reduction section is located 25% to 40% of the insertion length away from the tip of the arterial cannula to enable the arterial cannula to be inserted past a branching area of a blood vessel without blocking blood flow to surrounding branches of the blood vessel.

### Claim 2 (depends on 1)

The arterial cannula according to claim 1, wherein the arterial cannula has lateral holes and the diameter reduction section is arranged between the lateral holes and the tip of the arterial cannula.

### Claim 3 (depends on 1)

The arterial cannula according to claim 1, wherein the valve has several flaps.

### Claim 4 (depends on 1)

The arterial cannula according to claim 1, wherein the at least one flap has a spring mechanism.

### Claim 5 (depends on 2)

The arterial cannula according to claim 2, wherein one base of the at least one flap is arranged in the diameter reduction section.

### Claim 6 (depends on 1)

The arterial cannula according to claim 1, wherein the diameter reduction section is in the form of a conically tapering section.

### Claim 7 (depends on 1)

The arterial cannula according to claim 1, wherein a conical end of the tip has a length which is shorter than that of the internal diameter of the area of the arterial cannula adjoining the tip.

### Claim 8 (depends on 1)

The arterial cannula according to claim 1, the insertion length is 20 to 50 cm.

### Claim 9 (depends on 1)

The arterial cannula according to claim 1, wherein on an inner side of the arterial cannula, at least in sections, the arterial cannula comprises a spiral-shaped structure.

### Claim 10 (depends on 9)

The arterial cannula according to claim 9 wherein the spiral-shaped structure is an elevation.

### Claim 11 (depends on 9)

The arterial cannula according to claim 9, wherein the spiral-shaped structure is a recess.

### Claim 12 (depends on 9)

The arterial cannula according to claim 9, wherein the spiral-shaped structure is multiple-threaded.

### Claim 13 (depends on 9)

The arterial cannula according to claim 9, wherein the spiral-shaped structure is formed by a wire reinforcement of the arterial cannula.