# US 10,499,938 B2 · Percutaneous nephrolithotomy device

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- Number: US 10,499,938 B2
- Document ID: US10499938B2
- Status: Granted
- Kind: B2
- Application number: 15/518,247
- Filed: 2015-10-09
- Published: 2017-10-26
- Granted: 2019-12-10
- Earliest claimed: 2014-10-14
- Assignees: Coloplast A/S
- Applicants: Coloplast A/S
- Inventors: Gerard Louis Florent Torchio; Cesare Scoffone; David Rigotto
- Web page: https://patentgrep.com/patent/US10499938B2

## CPC

- A61B 17/221: Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)}
- A61B 2017/00336: {with a protective sleeve, e.g. retractable or slidable}
- A61B 2017/0034: {adapted to be inserted through a working channel of an endoscope}
- A61B 2017/0046: {with a releasable handle; with handle and operating part separable}
- A61B 2017/2901: {Details of shaft}
- A61B 2017/2904: {curved, but rigid}
- A61B 2017/2905: {flexible}
- A61B 2017/2918: {flexible handles}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

The present invention relates to an extraction device (10) for extracting foreign bodies from a patient, comprising a flexible extractor (11), a stiffening device (12) and connection means (13) for connecting the flexible extractor (11) to said stiffening device (12).

## Claims

### Claim 1

A percutaneous nephrolithotomy device, the device comprising:
a handle having a proximal lever part and a distal lever part that is spaced a distance away from the proximal lever part, where the distal lever part includes a pair of spaced apart legs including a first leg spaced a gap distance away from a second leg;
a transmission mandrin having a proximal end connected to the proximal lever part and a distal end adapted to be connected to a kidney stone extraction tool; and
a stiffener having a tube connected to a retainer, with the tube providing a lumen sized to receive the transmission mandrin and the retainer having a channel sized to receive the transmission mandrin;
wherein engagement of the retainer into the gap distance between the pair of spaced apart legs attaches the stiffener to the handle;
wherein the transmission mandrin has a mandrin length and the tube has a tube length, and a length of the channel of the retainer is equal to a difference between the mandrin length and the tube length.

### Claim 2 (depends on 1)

The device of claim 1, wherein the tube of the stiffener is connected to the retainer by a holding member, and the holding member includes an orifice aligned with the lumen in the tube.

### Claim 3 (depends on 1)

The device of claim 1, wherein the tube of the stiffener is connected to the retainer by a holding member, and the holding member includes a notch that is adapted to engage with a lug projecting from the distal lever part.

### Claim 4 (depends on 1)

The device of claim 1, further comprising:
a tab connected to the distal lever part and a lug projecting from the tab; and
a holding member connected between the tube and the retainer of the stiffener;
wherein the lug is sized to engage with a notch formed in the holding member to secure the stiffener to the handle.

### Claim 5 (depends on 1)

The device of claim 1, further comprising:
a cover attachable to the retainer.

### Claim 6 (depends on 1)

The device of claim 1, wherein the retainer is circular and the channel extends around a circumference of the circular retainer.

### Claim 7 (depends on 1)

The device of claim 1, further comprising:
a sheath placed over and in sliding engagement with the transmission mandrin.

### Claim 8 (depends on 1)

The device of claim 1, wherein the handle is adapted to bend to allow the proximal lever part to move relative to the distal lever part.

### Claim 9 (depends on 1)

The device of claim 1, wherein the transmission mandrin is slideably engaged through a hole formed in the distal lever part.

### Claim 10 (depends on 1)

The device of claim 1, wherein the proximal lever part and the distal lever part combine to form a U-shaped handle.