# US 11,076,905 B2 · Cryoprobe and method of manufacturing the same

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- Number: US 11,076,905 B2
- Document ID: US11076905B2
- Status: Granted
- Kind: B2
- Application number: 15/816,720
- Filed: 2017-11-17
- Published: 2018-05-24
- Granted: 2021-08-03
- Earliest claimed: 2016-11-18
- Assignees: Erbe Elektromedizin GmbH
- Applicants: Erbe Elektromedizin GmbH
- Inventors: Klaus Fischer; Jörg Kronenthaler; Achim Brodbeck; Marcus Adler
- Web page: https://patentgrep.com/patent/US11076905B2

## CPC

- A61B 18/02: by cooling, e.g. cryogenic techniques
- A61B 2017/00526: {Methods of manufacturing}
- A61B 2018/00166: {Multiple lumina}
- A61B 2018/0212: {using an instrument inserted into a body lumen, e.g. catheter}
- A61B 2018/0262: {using a circulating cryogenic fluid}
- A61B 2018/0268: {with restriction of flow}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

The inventive method of manufacturing a cryoprobe uses an assembly pin (25) for receiving a sleeve (20) that is to form a part of the head (13) of the cryoprobe and comprises three abutment surfaces (27, 29, 30) that are axially offset relative to each other, said abutment surfaces ensuring, following the attachment of the sleeve (20) and the nozzle (24) to the tube end (19), the correct axial positioning of the nozzle (24) and the sleeve (20), in particular, relative to the distal end surface (18) of the tube end (19). Consequently, the position of the nozzle (24) in the expansion chamber (23) that formed after the sleeve (20) was closed and thus the function of the cryoprobe are ensured.

## Claims

### Claim 1

Cryoprobe (12) apparatus comprising:
a tube device (14) that has a first channel (16) having arranged, in its distal end, a nozzle (24) with a nozzle shaft (24a) so that the nozzle (24) projects beyond an end of the first channel (16) and the nozzle shaft (24a) is inserted into a length of the first channel (16), and the tube device (14) also has a second channel (17) arranged at least parallel to and at a distance from the first channel (16), said second channel having a cross-section that is greater than a cross-section of one or both of the nozzle (24) and the first channel (16),
a sleeve (20) that is arranged on a distal tube end (19) of the tube device (14) and that has an inside clearance which—at least in a completely assembled state—is smaller than an outside diameter of the tube device (14), and
an end cap (21) that is arranged on a distal end of the sleeve (20) such that the end cap (21) closes said sleeve,
wherein the sleeve (20) either is deformed radially inward in at least one compression zone (31, 32) where the distal tube end (19) is compressed or has an inside diameter smaller than the outside diameter of the tube device (14) such that the tube device (14) where the tube device (14) overlaps with the sleeve (20) is compressed, which includes the at least one compression zone (31, 32), and
wherein the at least one compression zone (31, 32) at least partially overlaps the length of the first channel (16) in which the nozzle shaft (24a) is inserted such that compression of the distal tube end (19) compresses at least a portion of the first channel (16) against the nozzle shaft (24a).

### Claim 2 (depends on 1)

Cryoprobe according to claim 1, wherein the sleeve (20) is held on the tube end (19) by press-fit.

### Claim 3 (depends on 1)

Cryoprobe according to claim 1, wherein the sleeve (20) and the end cap (21) are connected to each other in a fluid-tight manner due to a tight connection.

### Claim 4 (depends on 1)

Cryoprobe according to claim 1, wherein the sleeve (20) and the end cap (21) are made together, without seam and in one piece.

### Claim 5 (depends on 1)

Cryoprobe according to claim 1, wherein the nozzle (24) is provided with an anchoring structure (36, 37, 38).

### Claim 6 (depends on 1)

Cryoprobe according to claim 1, wherein the nozzle (24) is arranged so as to extend through the sleeve (20) or the at least one compression zone (31, 32).

### Claim 7 (depends on 1)

Cryoprobe according to claim 1, wherein the second channel (17) is provided with a support structure (39).

### Claim 8 (depends on 1)

Cryoprobe according to claim 1, wherein the sleeve (20) is deformed radially inward in the at least one compression zone (31, 32) where the tube end (19) is compressed.