PATIENT SPECIFIC INSTRUMENTATION (PSI) FOR ORTHOPEDIC SURGERY
First Claim
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 ones of the 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 ones 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.
2 Assignments
0 Petitions
Accused Products
Abstract
The patient specific instrument (PSI) assembly for guiding a surgical tool on a tibia during a knee replacement surgery includes an extra-medullary portion at a distal end, an elongated rod connected at a distal end to the extra-medullary portion and extending in a direction along a mechanical axis of the tibia, and an upper mounting portion at a proximal end. The extra-medullary portion has a pair of spaced apart malleoli clamping elements with a size and/or relative position that is patient-specific for engaging respective ones of the lateral and medial malleoli. 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 and anchor element(s) on the upper mounting portion in locations adapted to overlay a peripheral contour of the tibia. The peripheral contour of the tibia including an anterior surface of the proximal tibia.
3 Citations
20 Claims
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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:
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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 ones of the 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 ones 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. 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:
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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 ones of the 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 ones 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, 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 resection cutting guide, the resection cutting guide having; a saw slot for receiving a saw of the surgical tool, the saw slot being operable to guide the saw along a resection plane transverse to the mechanical axis of the patient'"'"'s tibia; and an abutting surface on a bone abutting side of the resection cutting guide, the abutting surface adapted to abut the anterior surface of the patient'"'"'s proximal tibia; wherein the resection cutting guide is made of a plastic or metallic material produced by additive manufacturing. - View Dependent Claims (20)
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Specification