Orthopaedic surgical instrument for extracting a femoral stem component in a hip replacement surgical procedure and method of using the same
AssigneeDePuy Synthes Products, Inc.
InventorCory A. Shulaw
Life of this patent
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Abstract
An orthopaedic surgical instrument for extracting an implanted femoral stem component includes a clamping jaw configured to the clamp the femoral component in the instrument's extraction loop. A leaf spring applies a spring bias to the clamped femoral component. A method of using an orthopaedic surgical instrument to extract an implanted femoral component is also disclosed.
Claims19
An orthopaedic surgical instrument for extracting a femoral stem component during an orthopaedic hip replacement surgical procedure on a patient's femur, the orthopaedic surgical instrument comprising:
- an elongated body having (i) a connector formed in a proximal end of the elongated body, the connector being configured to fit into a chuck of an automated surgical impactor, and (ii) an extraction loop formed in a distal end of the elongated body, the extraction loop has a bore that extends through the elongated body and is configured to receive a neck of the femoral stem component therein,
- a locking lever having a pivot end pivotally coupled to the elongated body and an opposite latch end,
- a clamping jaw slidably coupled to the elongated body, the clamping jaw being movable between (i) a clamped position in which the clamping jaw is extended toward the extraction loop, and (ii) a released position in which the clamping jaw is retracted away from the extraction loop,
- a threaded drive assembly operatively coupled to the clamping jaw, the threaded drive assembly being operable to move the clamping jaw between its clamped position and its released position, and
- a leaf spring having a first end pivotally coupled to the locking lever and a second end coupled to the clamping jaw,
- wherein the threaded drive assembly includes a connecting link coupled to the first end of the leaf spring with a pivot pin, the connecting link being pivotally coupled to the locking lever via the pivot pin.
An orthopaedic surgical instrument for extracting a femoral stem component during an orthopaedic hip replacement surgical procedure on a patient's femur, the orthopaedic surgical instrument comprising:
- an elongated body having (i) a connector formed in a proximal end of the elongated body, the connector being configured to fit into the chuck of an automated surgical impactor, and (ii) an extraction loop formed in a distal end of the elongated body, the extraction loop has a bore that extends through the elongated body and is configured to receive a neck of the femoral stem component therein,
- a locking lever having a pivot end pivotally coupled to the elongated body and an opposite latch end,
- a drive link slidably coupled to the elongated body, the drive link being movable within the elongated body in a direction toward, and a direction away from, the extraction loop,
- a connecting link having a first end pivotally coupled to the locking lever and a second end pivotally coupled to the drive link,
- a clamping jaw slidably coupled to the elongated body, the clamping jaw being movable between (i) a clamped position in which the clamping jaw is extended toward the extraction loop, and (ii) a released position in which the clamping jaw is retracted away from the extraction loop, and
- a leaf spring having a first end pivotally coupled to the locking lever and a second end coupled to the clamping jaw,
- wherein (i) movement of the drive link in the direction toward the extraction loop causes the clamping jaw to be positioned in its clamped position, and (ii) movement of the drive link in the direction away from the extraction loop causes the clamping jaw to be positioned in its released position.
Dependencies are inferred from the claim text.