Ortho Oracle - orthopaedic operative atlas

IRON DEXTRAN/IMFERON

– for Iron defficiency when oral supplementaion not possible;  – must give test dose since Anaphylaxis is common

Iron Overload / Hemochromatosis

Discussion – rare disorder manifested by tissue accumulation of iron affecting liver, pancreas, heart, and gonads; – approx 1.7% of men & 0.6 percent of women are homozygotes; – hereditary disorder of iron metabolism – diabetes is common (bronze diabetes) – 20% develop joint involvement; – most pts are male between ages of 40-60 yrs; – … Read more

Intramedullary Nailing of Femoral Shaft Frx

– See:         – Distal Femoral Shaft Fractures         – Infected IM nails         – Open Fractures         – Proximal Femoral Shaft Fractures         – Synthes IM Femoral Nail – Discussion: Intramedullary Nailing:     – closed IM nailing has supplanted other forms of treatment  for femur frx;     – it affords predictable realignment of bone, rapid regeneration … Read more

Intrinsic Muscles of the Hand

– See:       – Dorsal Interossei       – Lumbricals:       – Palmar Interossei – Hypothenar Eminence:     – muscles of hypothenar eminence are  abductor, flexor, opponens digiti minimi, & palmaris brevis;     – muscles of hypothenar eminence are innervated by ulnar nerve; – Thenar Eminence:     … Read more

Intrinsic Tightness and the Intrinsic Plus Hand

– See:     – Intrinsic Muscles: – Discussion:     – results from intrisic stiffness (contracture);     – specific causes:            – truama:                – posttraumatic intrinsic contractures may occur after severe injuries to hand that have resulted in considerable                        edema or … Read more

Intrinsic Weakness and Claw Hand

– Discussion: – claw hand deformity is manifested by flattening of the transverse metacarpal arch and longitudinal arches, with hyperextension of MCP joints and flexion of the PIP and DIP joints; – deformity is produced by imbalance of the intrinsic & extrinsics; – intrinsic muscles must be markedly weakened or paralyzed to produce claw deformity; … Read more

Inverse I:E Ratio

– normally an inspiratory to expiratory time ratio (I/E) of 1:2 is used  – inverse I/E is also utilized in ARDS to prevent barotrauma  – long sustained inspiration reduces mean airway pressure while increasing the PaO2 for a given FiO2;  – despite the benefits in gas exchange, the prolonged inspiratory duration relative to expiration is … Read more

Intimal Injuries

– Discussion:       – intimal injury occurring with fractures may be extensive, & full extent of the injury may be evident only after arteriotomy;        – intimal injury may be manifested as intimal frx w/ thrombosis, intimal dissection, or a subintimal hematoma, which can all lead to               occlusion of the artery; – Repair: … Read more

Intrameduallary Devicies

– Ender nails introduced in 1970;     – nails backing out of the medullary canal     – perforation of nails thru the femoral head     – external rotational deformity at the fracture site     – distal migration     – ref:           – The use of Ender’s … Read more