21 results
Acid-Base Disorders - Differential Diagnosis Algorithm
Acidemia (pH < 7.35)
 • Metabolic Acidosis (HCO3 < 24mmol/L) CO2
Respiratory Acidosis (pCO2 ... • Metabolic Alkalosis ... • Respiratory Alkalosis ... (pCO2 < 35 mmHg ... Diagnosis #Algorithm #Causes
Acid Base and Blood Gas Analysis
1. pH - What’s the primary disturbance?
2. pCO2 - What’s the
2. pCO2 - What’s ... the pCO2? ... production Respiratory alkalosis ... - Contraction alkalosis ... nickmmark #acidbase #workup
Acid Base Disorders - Blood Gas Interpretation

Steps for Blood Gas Interpretation: 
1. Acidemia or Alkalemia? 
2.
7.35-7.45 • PaCO2 ... 35-45 mmHg • PaO2 ... Metabolic: pH pCO2 ... ↑ ↑ Metabolic alkalosis ... Acetazolamide Causes
Blood Gas (ABG) Interpretation and Acid-Base Pathology
1- Does the patient have an acidosis or an alkalosis?
acidosis or an alkalosis ... Look at the pCO2 ... concomitant respiratory alkalosis ... need to do more work ... Metabolic #Acidosis #Alkalosis
Approach to Acid Base Disorders - Evaluation and Differential Diagnosis
1) Start with the Anion Gap (AG).
2)
more acidotic or alkalotic ... and ~5 mmHg to pCO2 ... • Metabolic Alkalosis ... • Respiratory Alkalosis ... Disorders #Evaluation #workup
Hypokalemia Differential Algorithm
Acidosis
 - RTA
 - Diarrhea
pH Normal 
 1. Decreased Mg 
 2. Intracellular Shift
Periodic paralysis Alkalosis ... Metabolic alkalosis ... Algorithm #Diagnosis #Causes ... #Workup #Nephrology
Hypokalemia - Differential Diagnosis
Poor Intake 
 - Starvation
 - Anorexia
GI Losses 
 - Vomiting / NG
Catecholamines - Alkalosis ... Low #Potassium #Table ... Classification #Causes
Causes of Secondary Hypertension - Workup and Differential Diagnosis
Approach (when evaluation should be done):
1. Severe or
Hypertension - Workup ... with previously stable ... and metabolic alkalosis ... #Hypertension #Workup ... #causes #Differential
COPD phenotypes:  Blue Bloaters vs. Pink Puffers
The two most stereotypical forms of COPD are pink
a near-normal PaCO2 ... persistently increased work ... life-threat is increased work ... airflow obstruction causes ... increase in the work
Causes of Secondary Hypertension - Differential Diagnosis and Screening Testing
Common causes: 
 • Renal parenchymal disease
Causes of Secondary ... Testing Common causes ... Tests to evaluate cause ... #Screening #Workup ... #table