152 results
Fluids, Electrolytes, Acid-Base
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General Concepts
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< Osmolality vs osmolarity
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Osmolality
[H 20)
Milliosmoles per kg of water. The osmolality is the
Fluids, Electrolytes ... vs osmolarity ... ★ Osmolality [ ... The osmolality is ... #Fluids #Electrolytes
Polyuria - Differential Diagnosis Algorithm
Polyuria = >3L Urine output / 24 hours
Urine osmolality = 2 (Na
24 hours Urine osmolality ... /18 HIGH urine osmolality ... IV fluids, nutrition ... Azotemia LOW urine osmolality
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
Causes of Hypernatremia ... /L High Urine Osmolality ... glucosuria Low Urine Osmolality ... Diagnosis #Algorithm #Causes
Hyponatremia (<135 mEq/L) is a common electrolyte abnormality caused by an excess of total body water
electrolyte abnormality caused ... Measuring the serum osmolality ... among the possible causes ... lower than 80% in cases ... in blood urea causes
Causes of Polyuria - Differential Diagnosis Algorithm
Polyuria - Urine Output > 3L/day, Increased Urine Volume (>2ml/min)
Osmotic
Causes of Polyuria ... Diuresis Urine Osmolality ... > Serum Osmolality ... Diagnosis #Algorithm #Causes
Hyponatremia - Diagnosis and Treatment
Hyponatremia is usually caused by the inability to excrete water normally.
Hyponatremia is usually caused ... vast majority of cases ... Calculate serum osmolality ... Measure urine osmolality ... the underlying cause
Management of SIADH
Treat underlying cause:
 • Causes can include pain, primary lung pathology, post-operative phenomenon, medications,
Treat underlying cause ... : • Causes can ... administered • Can cause ... Saline: • If Urine osmolality
Simplified Approach to Acute Kidney Injury (AKI)
1) IS THIS AN EMERGENCY? 
Is there a dialysis indication
PROBLEM ~80% of AKI cases ... are caused by prerenal ... Trial isotonic fluids ... CONSIDER INTRINSIC CAUSES ... for WBCs, RBCs, casts
Sebaceous hyperplasia 
 - Yellow papule 
 - Donut-shape 
 - Central umbilication 
 - Telangiectasia
Usually multiple - Causes ... Benign #Clinical #Photo
Acute Kidney Injury - AKI Workup Algorithm and Differential Diagnosis
Baseline Investigations: full blood count with differential,
urea, uric acid, osmolarity ... If cause of AKI ... Diagnosis #nephrology #causes