"The Hip Gauge is to Total Hip Arthroplasty, as GPS is to safe aviation."
The Hip Calibration Gauge was first published on in the Proceedings of the Journal of Bone and Joint Surgery (Br) in 1988 70B Number 3 p508. It is reusable and manufactured by Enztec Ltd. A full surgical technique is available on Enztec's website and should be read (most surgeons do not take full advantage of the device, many have tried to copy but miss the important knowledge).
TO SET ACETABULAR INCLINATION AND ANTEVERSION, LEG LENGTH CHANGE, OFFSET CHANGE
The error is +/- 3mm. Offset change also is critical to the hip surgeon and avoids falling into traps. Acetabular mal-placement (version and inclination) is the most common cause of squeaking in CoC hips and excessive wear in hard on soft articulations, AND OF COURSE DISLOCATION!
Leg length error and DISLOCATION ARE AVOIDABLE!
YOU DO NOT NEED A CT SCAN OR A COMPUTER TO DO A PRIMARY THR ACCURATELY!
RADIOLOGY REQUIRED BEFORE USE: (AVOID THE TRAP OF THE UNRECOGNISED SPINO-PELVIC DEFORMITY)
1. AP hips standing and calibrated
2. A standing DIRECT LATERAL with the affected hip away from the film, BEAM CENTERED ON THE FEMORAL HEAD , (hips and knees slightly flexed until the spine is "comfortable", in cases of fixed flexion deformity.) A sitting direct lateral can also be done at the surgeons direction, or other functional positions.
FOR ALL THR'S BEING DONE , THESE 2 FILMS ARE THE MINIMUM REQUIREMENT.
NO THR SHOULD BE DONE ELECTIVELY WITH A SUPINE AP HIPS UNCALIBRATED, AND A CROSS TABLE LATERAL RADIOGRAPH ALONE!
For further help or ppt of it's use contact P James Burn.
TO SET ACETABULAR INCLINATION AND ANTEVERSION, LEG LENGTH CHANGE, OFFSET CHANGE
The error is +/- 3mm. Offset change also is critical to the hip surgeon and avoids falling into traps. Acetabular mal-placement (version and inclination) is the most common cause of squeaking in CoC hips and excessive wear in hard on soft articulations, AND OF COURSE DISLOCATION!
Leg length error and DISLOCATION ARE AVOIDABLE!
YOU DO NOT NEED A CT SCAN OR A COMPUTER TO DO A PRIMARY THR ACCURATELY!
RADIOLOGY REQUIRED BEFORE USE: (AVOID THE TRAP OF THE UNRECOGNISED SPINO-PELVIC DEFORMITY)
1. AP hips standing and calibrated
2. A standing DIRECT LATERAL with the affected hip away from the film, BEAM CENTERED ON THE FEMORAL HEAD , (hips and knees slightly flexed until the spine is "comfortable", in cases of fixed flexion deformity.) A sitting direct lateral can also be done at the surgeons direction, or other functional positions.
FOR ALL THR'S BEING DONE , THESE 2 FILMS ARE THE MINIMUM REQUIREMENT.
NO THR SHOULD BE DONE ELECTIVELY WITH A SUPINE AP HIPS UNCALIBRATED, AND A CROSS TABLE LATERAL RADIOGRAPH ALONE!
For further help or ppt of it's use contact P James Burn.
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