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Acid Base Disorders - Formulas for appropriate metabolic and respiratory compensation

- Dr Amith Sreedharan - Consultant
Acid Base Disorders ... #Acidosis #Alkalosis ... #Compensation # ... Winters #Diagnosis #Nephrology ... #AcidBase
Acid-Base Disorders - Differential Diagnosis Algorithm
Acidemia (pH < 7.35)
 • Metabolic Acidosis (HCO3 < 24mmol/L) CO2
Acid-Base Disorders ... Acidosis (HCO3 ... < 35 mmHg) #AcidBase ... Diagnosis #Algorithm #Causes ... #Compensation
Acid Base Disorders - Blood Gas Interpretation

Steps for Blood Gas Interpretation: 
1. Acidemia or Alkalemia? 
2.
Metabolic alkalosis ... D-lactate (short bowel syndrome ... of Metabolic Alkalosis ... MDaniyalHashmi1 #AcidBase ... Diagnosis #Summary #Nephrology
Metabolic Alkalosis - Urinary Chloride Algorithm
Cl- responsive metabolic alkalosis
 • Kidney loss of Cl-
Metabolic Alkalosis ... Anion gap metabolic ... the indicated causes ... #Metabolic #Alkalosis ... urine #Algorithm #nephrology
Causes of Metabolic Alkalosis: Differential Diagnosis
ECF volume contracted: urine chloride concentration <20 meq/L
 • Gastric alkalosis:
Causes of Metabolic ... chronic respiratory acidosis ... diuretic effect has ... #Diagnosis #Causes ... #nephrology
Hypokalemia Evaluation Algorithm

Before evaluating hypokalemia, life threatening complications such as arrhythmias and paralysis should be looked
complications such as ... wasting from other causes ... Alkalosis: Emesis ... acidosis: Proximal ... differential #potassium #nephrology
Differential Diagnosis of Respiratory Acid-Base Disorders
Alkalosis
A. Central nervous system stimulation: Pain, Anxiety, psychosis, Fever, Cerebrovascular accident,
Respiratory Acid-Base Disorders ... Recovery from metabolic ... respiratory distress syndrome ... #respiratory #acidbase ... #acidosis #alkalosis
Causes of Hypokalemia
Transcellular Shifts:
 - Alkalosis, Increased plasma insulin (treatment of diabetic ketoacidosis), ß-Adrenergic agonists, Hypokalemic
Transcellular Shifts: - Alkalosis ... plasma insulin (treatment ... hypomagnesemia), Eating disorders ... Renal tubular acidosis ... differential #diagnosis #nephrology
Causes of Secondary Hypertension - Workup and Differential Diagnosis
Approach (when evaluation should be done):
1. Severe or
with previously stable ... with electrolyte disorders ... hypokalemia and metabolic ... alkalosis. 7. ... Neurologic disorders
Diuretics and Agents Regulating Renal Excretion

Carbonic Anhydrase Inhibitors (Acetazolamide, Dichlorphenamide)
 • Glaucoma
 • Epilepsy
 • Altitude
resistance • Metabolic ... alkalosis • Familial ... Kidney stones caused ... Tolvaptan) • Treatment ... #Medications #Table