A trauma surgeon explains that the hip joint is most vulnerable to dislocation in a particular position because capsular and ligamentous tension is minimal there. Which position is this?

• A Full extension with internal rotation
• B Flexion with internal rotation and adduction
• C Extension with slight abduction
• D Flexion, abduction, and external rotation ✓

Explanation

The hip is least stable in flexion, abduction, and external rotation, where the iliofemoral and ischiofemoral ligaments are unwound and slack, allowing the femoral head to slip out of the acetabulum. Option B describes the posture of a classical posterior dislocation after it has occurred, not the vulnerable position in which the head escapes, which is what distinguishes the two choices.

Reference: Gray's Anatomy for Students, 4th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.