US 12,133,668 B2
Endosteal guide pin, positioning trocar and trocar for removing said pin
Eric Decoux, Saint-Gély-du-Fesc (FR); and Nguyen-Thanh Denis Hoa, Saint-Gély-du-Fesc (FR)
Assigned to HIRONDELLE MEDICAL, Aubagne (FR)
Filed by HIRONDELLE MEDICAL, Aubagne (FR)
Filed on Dec. 15, 2021, as Appl. No. 17/551,992.
Application 17/551,992 is a division of application No. 16/489,491, granted, now 11,229,470, previously published as PCT/FR2018/050624, filed on Mar. 15, 2018.
Claims priority of application No. PCT/FR2017/050595 (WO), filed on Mar. 15, 2017.
Prior Publication US 2022/0104861 A1, Apr. 7, 2022
Int. Cl. A61B 17/88 (2006.01); A61B 17/34 (2006.01); A61B 17/70 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/8897 (2013.01) [A61B 17/3421 (2013.01); A61B 17/3468 (2013.01); A61B 17/3472 (2013.01); A61B 17/7091 (2013.01); A61B 2017/0046 (2013.01); A61B 17/7001 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A trocar system comprising:
an endosteal guide pin;
a positioning trocar; and
a removal trocar for removing the endosteal guide pin for preparing a guide path for an implantation of a pedicle or orthopaedic screw;
wherein the endosteal guide pin includes:
a head intended to be provisionally implanted in a bone,
a guide rod being coaxial with and rigidly connected to the head and ending in a free end adapted such that the guide rod is at least flush with a skin surface of a patient when the endosteal guide pin is in an implanted position in the bone,
a first coupling means intended to ensure a rigid connection thereof to and a disconnection thereof from at least one part of the positioning trocar, said first coupling means comprising a rotation locking element provided on the head of the endosteal guide pin, and
a second coupling means intended at least to ensure a rigid connection thereof to the removal trocar, said second coupling means being located at an end of the guide rod opposite the free end or an end part of the head rigidly connected to the guide rod; and
wherein the removal trocar includes: a hollow fixing rod intended to be fitted around the guide rod of said endosteal guide pin such that the endosteal guide pin slides, and a cooperating coupling means cooperating with the second coupling means of said endosteal guide pin to form a removable rigid connection system enabling the endosteal guide pin to be removed when the second coupling means of the endosteal guide pin and the cooperating coupling means of the hollow fixing rod of the removal trocar are assembled together.