Ortho Oracle - orthopaedic operative atlas

Aztreonam/Azactam

– for aerobic Gm Neg bact and Enteric & P. aeruginosa – Adult: 1-2gm IV/IM q6-12hr; – Not effective for Gm pos nor anaerobic bacteria; – Poor activity with: Staph, enterococci, NonEnteroStrep; – may be given to Penicillin sensative individuals; – Good diffusion from blood into CSF only with inflammation;     Ratio of CSF … Read more

Axillary nerve

– Discuussion: – axillary nerve (C5, C6) originates from and passes backward from posterior cord of brachial plexus  – at level of axilla; – it arises immediately posterior to the coracoid process and conjoined tendon; – it crosses the inferolateral surface of the subscapularis, 3-5 mm medial to the musculotendinous border; – sweeping a finger … Read more

Azathioprine

– Discussion:  – prevents conversion of purine bases by suppressing synthesis of guanine and adenosine; – RA Doses: 1-2.5 mg/kg/day;  – onset of action is usually 12 to 24 weeks;  – discontinuation of the drug is marked by a return in disease activity;  – Toxicity:  – most common toxicity is gastrointestinal including nausea, anorexia, and, … Read more

Avascular Necrosis of Femoral Head

Discussion: – pathogenesis – vascular interruption: – blood supply to femoral head – specific inciting causes – natural history – diff dx: – synovitis; – Idiopathic Transient Osteoporosis of the Hip – femoral neck stress frx – metastatic disease – trochanteric bursitis: – ref: Avascular necrosis of the femoral head presenting as trochanteric bursitis. – … Read more

Atrial Flutter

– See: A. Fib  – Discussion:   – atrial flutter may be assoc w/ sick sinus syndrome, hypoxia, Pericarditis, valvular heart dz, and less commonly, acute myocardial infarction;  – orginates in a single atrial ectopic focus;  – flutter waves occur in rapid succession & are identical;  – flutter waves have “saw tooth” appearance & do not … Read more

Compartment Syndromes of Hand and Forearm

– Antebrachial Compartment Syndrome: (see compartment syndrome menu)     – causes:           – may follow supracondylar fr(x) of humerus, or both bone forearm fractures;           – compartment syndromes in the forearm after wrist fractures usually involve the volar compartment;      – compartment syndrome monitoring     – technique of forearm fasciotomy: (see … Read more

Compartment Syndrome

 – Discussion:     – pathophysiology:      – compartment syndrome is elevation of interstitial pressure in closed fascial compartment that results in microvascular compromise;     – as duration & magnitude of interstitial pressure increase, myoneural function is impaired & necrosis of soft tissues eventually develops;     – intracompartmental pressure:         … Read more

CNS Medication List

    Analgesic     Anti-Anxiety     Anti-Convulsant     Anti-Depressant     Tricyclics     Antiemetics     Anti-Histamines     Anti-Parkinson     Sedatives/Hypnotics     Antitussives     Anti-Pyschotics     Opiods – Discussion:     – tricyclic antidepressants may inhibit the metabolism of neuroleptic agents, just as neuroleptics may inhibit metabolism … Read more