US 12,440,222 B2
Surgical instrument
Franz-Peter Firmbach, Emmingen-Liptingen (DE); and Svenja Anhorn, Heroldstatt (DE)
Assigned to Aesculap AG, Tuttlingen (DE)
Filed by Aesculap AG, Tuttlingen (DE)
Filed on Jun. 2, 2023, as Appl. No. 18/328,051.
Claims priority of application No. 10 2022 205 694.9 (DE), filed on Jun. 3, 2022.
Prior Publication US 2023/0389938 A1, Dec. 7, 2023
Int. Cl. A61B 17/15 (2006.01); A61B 17/17 (2006.01); A61B 17/16 (2006.01)
CPC A61B 17/157 (2013.01) [A61B 17/1764 (2013.01); A61B 17/1675 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A surgical instrument for use in a knee-replacement operation, the surgical instrument comprising:
a main body configured for releasable fastening on a tibia-cutting block for guiding cutting on a proximal tibia of a tibia;
a first stylus; and
a second stylus,
the first stylus and the second stylus each being mounted on the main body so as to be movable relative to the main body,
the first stylus and the second stylus each having a first end and a second end and extending along a longitudinal axis between the first end and the second end,
the first ends each configured to make contact with a tibial plateau of the tibia,
the first stylus being mounted on the main body so as to be pivotable about a first pivot axis relative to the main body and the second stylus, and
the second stylus being mounted on the main body so as to be pivotable about a second pivot axis relative to the main body and the first stylus,
wherein:
the main body has a first bearing pin,
the first stylus has a first slot, in which the first bearing pin engages for relative movement about the first pivot axis and along a longitudinal-extent direction of the first slot,
the first bearing pin has axially spaced-apart first and second radial collars between which the first stylus is retained in an axially form-fitting manner,
the first radial collar of the first bearing pin is rotationally asymmetric and elongate in a direction orthogonal to the first pivot axis and immovably fixed to the main body, and
the first stylus is rotatable about the first axis relative to the first radial collar of the first bearing pin.