The Hip book

Sacrum and Sacral Fractures

– See:      – Posterior Pelvic Injury:      – Sacroiliac Fracture Dislocations:      – Sacral Stress Fractures: – Anatomy of Sacrum: – Classification:     – zone I:            – frx across sacral ala can cause L5 nerve root impingement;            – about 6% … Read more

Sacral Sparing

– See: neurological exam: – Discussion:     – sacral segments must be carefully examined for sensation & motor power;     – scaral sparing is evidenced by perianal sensation, rectal motor function, and great toe flexor activity;     – in patient w/ an apparent complete neurologic injury, any sensory awareness distally or scant … Read more

RSD: Role of Bone Scans

– Bone scan:     – generally considered sensitive but not specific;     – bone scans may help to r/o associated conditions such as a stress frx;     – Triphasic Bone Scan:           – may add higher degree of specificity;           – first stage is … Read more

Rotary PIP Subluxation

– Discussion:     – usually presents as irreducible dislocation of PIP joint (as opposed to dorsal dislocations which are usually reducible);     – rotatory dislocation involves buttonholing of one condyle of head of proximal phalanx through longitudinal rent in extensor hood between central slip and lateral band;            – see: … Read more

Rolando’s fracture

– See:      – Anatomy of CMC joint      – Bennett’s Fracture      – Thumb Fractures / Dislocations – Discussion:     – described in 1910 by Dr. Rolando;     – involves 3 part frx at base of metacarpal;     – in addition to volar lip frx (as seen w/ … Read more