- Lateral position
An urinary catheter should always be inserted prior to surgery.
Lateral position on flat-top table
The patient is supported in the lateral decubitus position on a radiolucent flat-top operating table.
Place padded cushions under bony prominences to avoid excessive pressure. An alternative to the illustrated body supports is to use a radiolucent vacuum mattress to stabilize the patient.
The knee should be flexed about 45° to relax the sciatic nerve.
Note: Avoid sciatic nerve injury
The sciatic nerve is under maximal traction when the hip joint is flexed and the knee joint extended. To avoid sciatic nerve palsy keep the hip joint as extended and the knee joint as flexed as possible throughout the surgical procedure
Before draping, make sure the involved acetabulum is well visible under fluoroscopy in AP, iliac and obturator oblique views.
The injured-side leg will be draped free. Then apply sterile drapes to expose the entire hip region from mid-anterior to mid-posterior, and distally to the lower thigh.
Alternative: fracture table
The patient is supported in the lateral decubitus position on a specially
designed fracture table.
An appropriate fracture table allows complete mobility of the hip, as well as distal traction through an ipsilateral transcondylar pin and laterally directed pressure with an adjustable post supporting the proximal part of the thigh. The ipsilateral knee must be flexed at least 45 degrees to relax the sciatic nerve.
Firmly support the patient’s chest with padded posts. The perineal post, between the thighs, helps stabilize the pelvis, with countertraction, if necessary.
The table spars may be adjusted intraoperatively to assist fracture reduction, by changing the position of the hip.
Note that the „perineal post“ is actually supporting the ipsilateral thigh rather than exerting perineal pressure.