# US 11,076,894 B2 · System for inserting and removing a locator-pin in a bone

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- Number: US 11,076,894 B2
- Document ID: US11076894B2
- Status: Granted
- Kind: B2
- Application number: 15/631,081
- Filed: 2017-06-23
- Published: 2018-12-27
- Granted: 2021-08-03
- Earliest claimed: 2017-06-23
- Assignees: Stylitech
- Applicants: Stylitech
- Inventors: Thierry Marnay
- Web page: https://patentgrep.com/patent/US11076894B2

## CPC

- A61B 17/7079: {Tools requiring anchors to be already mounted on an implanted longitudinal or transverse element, e.g. where said element guides the anchor motion}
- A61B 17/1757: {for the spine}
- A61B 17/7082: {for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws}
- A61B 17/846: {Nails or pins, i.e. anchors without movable parts, holding by friction only, with or without structured surface (A61B17/72, A61B17/86 take precedence)}
- A61B 17/8897: {Guide wires or guide pins}
- A61B 17/7032: {Screws or hooks with U-shaped head or back through which longitudinal rods pass}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A locator-pin for positioning a pedicle screw in a bone, comprising a pin body, a distal portion comprising a trocar tip shaped to penetrate a bone by pressing and/or percussing and a proximal portion equipped with a first fixing member to fix, during use, to an insertion pin-carrier and a second fixing member to fix, during use, to a removal pin-carrier, the two fixing members being different, wherein the first fixing member is able to transmit at least an axial push parallel to an axis of a locator-pin, and the second fixing member is able to transmit at least an axial draw parallel to the axis of the locator-pin and at least one sense of rotation around the axis of the locator-pin. Systems comprising the locator-pin and methods of recovering a positioned locator-pin.

## Claims

### Claim 1

A method for recovering a positioned locator-pin (110-210) from a patient, wherein the locator-pin (110-210) comprises a smooth pin body (112), a distal portion comprising a smooth trocar tip (114) shaped to penetrate a bone by pressing and/or percussing, and a proximal portion (116) equipped with a first fixing member (118) to fix, during use, to an insertion pin-carrier (120) equipped with a fixing member (121) complementary to the first fixing member (118) of the locator-pin and a second fixing member (119) to fix, during use, to a removal pin-carrier (130), the two fixing members (118, 119) being different, wherein the first fixing member (118) is able to transmit at least an axial push parallel to an axis of a locator-pin, and the second fixing member (119) is able to transmit at least an axial draw parallel to the axis of the locator-pin and at least one sense of rotation around the axis of the locator-pin, the method comprising:
providing a removal pin-carrier (130) equipped with a fixing member (131) complementary to the second fixing member (119) of the locator-pin,
making an incision to disengage a proximal portion (116, 216) of the positioned locator-pin,
providing a guide cannula (140) designed to receive freely sliding the locator-pin (110), the insertion pin-carrier (120) and the removal pin-carrier (130), and reinserting the guide cannula (140),
encasing the locator-pin and following its path into the pedicle of vertebra O, introducing the removal pin-carrier (130) into the guide cannula (140) and screwing onto a threaded portion (119) of the locator-pin (110) to secure the locator-pin and removing the locator-pin through the guide cannula (140), which is left in place.

### Claim 2 (depends on 1)

The method of claim 1, wherein the first fixing member of the locator pin is a bayonet fixing member and the second fixing member is a threaded fixing member.

### Claim 3 (depends on 2)

The method of claim 2, wherein the bayonet fixing member of the locator pin comprises a lug (118) arranged radially on the proximal portion (116) of the locator-pin, and designed to slide axially, during use, in a groove (121) located in the insertion pin-carrier (120); and the threaded fixing member is a threaded portion (119) arranged on the proximal portion (116) of the locator-pin, between the first fixing member (118) and a proximal end of the locator-pin, and designed to be screwed, during use, into a tapped hole (131) located in the removal pin-carrier (130).

### Claim 4 (depends on 2)

The method of claim 2, wherein the bayonet fixing member of the locator pin comprises a groove (218) arranged on the proximal portion (216) of the pin, and designed to receive, during use, a lug (222) arranged radially in a cavity (224) located in the insertion pin-carrier (220) and the threaded fixing member is a threaded portion (119) arranged on the proximal portion (216), between the first fixing member (218) and a proximal end of the locator-pin, and designed to be screwed, during use, into a tapped hole (131) located in the removal pin-carrier (130).

### Claim 5 (depends on 2)

The method of claim 2, wherein a flat surface (115) is provided between the proximal portion (116) and the pin body (112) of the locator pin.

### Claim 6 (depends on 1)

The method of claim 1, wherein the insertion pin-carrier (120) of the locator-pin comprises a cylindrical body, a proximal end equipped with a gripping handle (126), a distal end (124) equipped with a groove (121) designed to receive, during use, a lug (118) located in the locator-pin (110), the groove (121) being arranged to enable radial locking of the lug (118) and a tubular cavity (122) designed to receive sliding freely, during use, a threaded portion (119) located on the locator-pin.

### Claim 7 (depends on 1)

The method of claim 1, wherein the insertion pin-carrier (120) of the locator-pin comprises a cylindrical body (226), a proximal end equipped with a gripping handle (228), a distal end equipped with a tubular cavity (224) designed to receive sliding freely, during use, a threaded portion (119) located on the locator-pin (210) and a lug (222) arranged radially in the tubular cavity (224) and designed to engage, during use, in a groove (218) arranged on a proximal portion (216) of the locator-pin (210) to enable radial locking of the lug (222).

### Claim 8 (depends on 1)

The method of claim 1, wherein the removal pin-carrier of a locator-pin (110-210) comprises a cylindrical body (132), a proximal end equipped with a gripping handle (133) and a distal end equipped with a tapped hole (131) designed to be screwed, during use, onto a threaded portion (119) located on a locator-pin (110-210).