The Hip - book

Insertional Activity

– Discussion:     – when needle is inserted into muscle or moved w/in muscle, there is a single burst of activity that usually lasts 300 to 500 ms;     – activity is related to movement of electrode and is thought to result from mechanical stimulation or injury of the muscle fibers; – Increased Insertional Activity: … Read more

Insertion of Cementless Femoral Stem

– Technique Considerations:     – entry into the medullary canal:     – femoral reaming:     – broaching for press fit stems:            – the last broach in inserted carefully and should advance with each blow of the mallet;            – as the broach is … Read more

Insertion of Cemented Femoral Stem

– See:        – characteristics of cemented femoral stems        – loosening cemented femoral component:        – collar: in THR        – optimal cementing technique        – removal of cemented femoral stems: – Preparation for Insertion:     – calcar planer:         … Read more

Insall and Salvati Method

– Discussion:     – in normal knees, constant relationship exists between length of patella (LP) and length of the patella tendon (LT);           – length of tendon (LT) is measured on its post surface from the lower pole of patella to its insertion on top of tibial tubercle;         … Read more

Inorganic Constituents of Bone

– Discussion:     – inorganic phase of bone accounts for about 65% of its dry wt;     – bulk of the mineral in bone is composed of calcium & phosphate, which in adult is primarily crystalline in structure and resembles synthetic           hydroxyapatite crystals;     – minor mineral constituents of bone are magnesium, sodium, … Read more

Innervation of the Skin of the Gluteal Region

– Discussion:     – in lateral gluteal region, cutaneous nerves are lateral cutaneous branches of T12 & Iliohypogastric (L1 ) nerves;     – superior region: receives superior cluneal nerves (lateral branches of dorsal rami of L1, L2, L3)          – these superior cluneal nerves may be damaged by iliac crest grafting   … Read more

Late Results of Ankle Fusion

Acta Orthop Scand. 1981;52(1):103-105   Ahlberg A, Henricson AS   ABSTRACT   Forty-four ankle joint fusions performed in the period 1950-1972 at the Department of Orthopedic Surgery, Malmö General Hospital, were evaluated. Thirty-one patients were re-examined. The mean follow-up time was 12.3 years (6.4-28 years). Two-thirds of the patients were much better or better than … Read more

Laboratory and Radiographic Workup for Osteomyelitis

– Labs:     – WBC, ESR, CRP;     – gram stain and culture:          – prior to giving antibiotics, it is essential that a gram stain and culture be collected;                 – in hematogenous osteomyelitis, a bone aspirate is required which can usually … Read more