Leg Length Caliper with Sterilizable Level & Case
Michael Koonin, MD
Designed to help measure and evaluate pre- and post-THR leg length in conjunction with X-ray calibration and clinical judgement
Utilizes a 5/32″ (4mm) pin in the wound just proximal to the acetabulum and a 1/8″ (3.2mm) pin in the greater trochanter. (The soft tissue is cleared away and a single drill hole is drilled in the trochanter to accommodate the distal pin, and the hole is marked with methyline blue so it can be easily found.) Alternatively, a 7.3mm cannulated screw that accepts a 3.2mm pin may be used in the greater trochanter. Using the sliding caliper, the difference in leg length measurement before hip dislocation and after the THR procedure helps show the change in leg length.
The level helps to ensure the leg is in the same plane when initially putting the leg length caliper on and when reattaching the caliper. The level can be steam sterilized without vacuum for use in surgery.
Product Number(s)
1195
Accuracy Statement for devices with a measuring function: Devices with a measuring function are considered non-critical, non-calibrated, and are intended for reference-only measurements. While it provides a helpful visual guide for relative measurements, it is not calibrated to specific precision standards. Measurements taken with this device should not be considered accurate enough for critical applications requiring strict dimensional tolerances. General manufacturing tolerances of +\- 1% at each graduation, or 2% of the full scale apply, but no conformance qualifications are provided or implied.