HIV brain mass
Consider a 45 year-old HIV positive male with right hemiparesis and fluctuating conscious state. His CT head is shown below.
Month January 2019
Cyanide Poisoning
Cyanide is a potentially lethal toxic agent that can be found in liquid and gaseous form. First discovered in 1786 by Scheele, who extracted it from the dye Prussian blue - and promptly died from exposure to the vapours
Salicylate Poisoning
Salicylate poisoning: mechanisms of toxicity: acid-base disturbance, uncoupling of oxidative phosphorylation, disordered glucose metabolism
Standardised Mortality Ratio
Standardised Mortality Ratio SMR is the ratio of the observed or actual hospital mortality and the predicted hospital mortality for a specified time period.
Diaphragmatic Palsy
Diaphragmatic Palsy: unilateral can be asymptomatic depending on patients underlying respiratory reserve; bilateral -> most mechanical ventilation dependent
Palmar erythema DDx
Palmar erythema is a non-specific finding characterised by a redness of the palmar skin.
SVC Obstruction DDx
Obstruction of the superior vena cava results from mediastinal mass lesions. Features include a plethoric and cyanosed face with periorbital oedema, exophthalmos, conjunctival injection, and venous dilatation in the fundi, distended non-pulsatile neck veins and a positive Pemberton sign.
Clubbing DDx
Clubbing is an abnormality of the fingertips with following features: beaked nails; loss of angle between nail bed and finger; increased AP width of finger tip; sponginess of proximal nail bed
Shoulder pain radiating down the arm
Shoulder pain radiating down the arm can be a diagnostic dilemma, with causes arising from multiple visceral and musculoskeletal structures.
VF and VT DDx
Ventricular fibrillation and (pulseless) ventricular tachycardia mandate immediate CPR, advanced life support and correction of underlying causes.
Tachycardia DDx
Tachycardia refers to heart rate >100/min in an adult. Tachycardias are classified as regular or irregular, narrow complex or wide complex. The underlying causes of tachycardia are legion
Supraventricular tachycardia DDx
SVTs are supraventricular tachycardias, that can be either atrial tachydysrhythmias (such as atrial fibrillation) or atrioventricular tachydysrhythmias. This document concerns the latter.