14 results
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
Approach to Thyroid Function ... T4 +/- T3 → Subclinical ... T4 +/- T3 → Primary ... Hyperthyroidism #algorithm ... endocrinology #TFTs #TSH #Interpretation
Thyrotoxic Periodic Paralysis - Illness Script
 • Epidemiology: Asian men age 20-30 with hyperthyroidism of any
Heavy exercise, fasting ... Hypokalemia +/- low ... high fT4 or high T3 ... • Treatment: Potassium ... hyperthyroidism, Potassium
Hypokalemia - Differential Diagnosis Algorithm

Transcellular Shift:
 • Alkalosis
 • ↑ beta-2 adrenergic simulation 
 • Erythropoiesis
Hypokalemic periodic paralysis ... GI losses (NG suction ... vomiting) • Low ... #nephrology #low ... #potassium
Hypokalemia Evaluation Algorithm

Before evaluating hypokalemia, life threatening complications such as arrhythmias and paralysis should be looked
Hypokalemia Evaluation Algorithm ... arrhythmias and paralysis ... from other causes ... consumption • Low ... #nephrology #low
Hypokalemia - Differential Diagnosis
Poor Intake 
 - Starvation
 - Anorexia
GI Losses 
 - Vomiting / NG
type 4) - Salt wasting ... Hypokalemic periodic paralysis ... Differential #Diagnosis #Low ... #Potassium #Table ... Classification #Causes
Adrenal Insufficiency Diagnosis Algorithm - Evaluation of HPA Axis Response to ACTH

Early am cortisol < 3
Insufficiency Diagnosis Algorithm ... unclear (often the case ... then go to stim testing ... normal adrenal function ... primary AI - Low
Causes of Primary Amenorrhea - Differential Diagnosis Algorithm
No onset of menarche by age 16 with secondary
Causes of Primary ... Differential Diagnosis Algorithm ... Etiology - High FSH, Low ... Hypothalamic: • Functional ... #Causes #OBGyn
Causes of Secondary Amenorrhea - Differential Diagnosis Algorithm
Absence of menses for more than 3 cycles or
Causes of Secondary ... FSH, Low estrogen ... : • Functional ... (e.g. eating disorder ... #Causes #OBGyn
Causes of Hypokalemia - Differential Diagnosis Algorithm
Decreased intake (rare cause in isolation)
GI loss - Urine loss
Causes of Hypokalemia ... Differential Diagnosis Algorithm ... Vomiting • NG suction ... Differential #Diagnosis #Algorithm ... #Causes
Metabolic Alkalosis - Urinary Chloride Algorithm
Cl- responsive metabolic alkalosis
 • Kidney loss of Cl-
Urinary Chloride Algorithm ... Vomiting/nasogastric suction ... alkalosis • Normal/low ... the indicated causes ... of sodium and potassium