Patient specific instrumentation (PSI) for orthopedic surgery

  • US 10,881,416 B2
  • Filed: 03/15/2019
  • Issued: 01/05/2021
  • Est. Priority Date: 09/25/2013
  • Status: Active Grant
First Claim
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1. A patient specific instrument assembly for guiding a surgical tool on a patient'"'"'s tibia during a knee replacement surgery, the patient specific instrument assembly comprising:

  • an extra-medullary portion at a distal end of the patient specific instrument assembly, the extra-medullary portion having a pair of spaced apart malleoli clamping elements for engaging respective one of a lateral and medial malleoli of the patient, the malleoli clamping elements having a size and/or relative position that is patient-specific for engaging respective one of the lateral and medial malleoli of the patient;

    an elongated rod connected at a distal end to the extra-medullary portion, the elongated rod configured to extend in a direction along a mechanical axis of the patient'"'"'s tibia; and

    an upper mounting portion at a proximal end of the patient specific instrument assembly, the upper mounting portion including a base body connected to a proximal end of the elongated rod and a surgical guide having guide openings extending therethrough, at least one of said guide openings adapted to receive the surgical tool, the surgical guide having one or more anchor elements disposed on the upper mounting portion in locations adapted to overlay a peripheral contour of the patient'"'"'s tibia, the peripheral contour of the patient'"'"'s tibia including an anterior surface of the patient'"'"'s proximal tibia.

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