Outside-In Capsulotomy for Intra-articular Hip Access

Area of Science:

• Orthopedic Surgery
• Arthroscopy
• Hip Preservation

Background:

• Arthroscopic treatment for excessive acetabular coverage (pincer morphology, coxa profunda) can be challenging.
• Nondistractible hips present difficulties for standard arthroscopic access.

Purpose of the Study:

• To describe the outside-in capsulotomy technique for hip arthroscopy.
• To evaluate its safety and efficacy in patients with limited hip joint access.

Main Methods:

• The outside-in capsulotomy is performed without traction, creating a modified anterior portal under direct visualization.
• Extracapsular dissection identifies the rectus femoris, with capsulotomy performed distal to its insertion.
• Hip flexion protects the femoral head cartilage before completing the capsulotomy and reapplying traction.

Main Results:

• This technique decreases operative traction time and the force required for hip distraction.
• It provides safe and efficient intra-articular access in challenging hip cases.
• Studies show satisfactory patient-reported outcomes in those with severe pincer morphology.

Conclusions:

• The outside-in capsulotomy is a safe and effective method for achieving hip joint access in limited or nondistractible hips.
• It is indicated in cases of acetabular retroversion, high lateral center-edge angle, coxa profunda, or for stiff hip preservation candidates.