Ace Your First Aid for the USMLE Step 1 (2021) Classes and Exams with Picmonic: #1 Visual Mnemonic Study Tool for Physician Assistant (PA) Students
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First Aid for the USMLE Step 1 (2021) | Physician Assistant (PA) School Study Aid
Blood Acid-Base Control
- Characteristics
- In a State of Acidemia
- Medullary Chemoreceptors Control Ventilation Rate
- Expulsion of CO2 through Lungs Increases pH
- Bicarbonate Reabsorption from the Kidney Increases pH
- Kidney Excretion of H+ Increases pH
2 mins
Normal Gap Metabolic Acidosis
- HARD-ASS
- Hyperalimentation
- Addison's Disease
- Renal Tubular Acidosis
- Diarrhea
- Acetazolamide
- Spironolactone
- Saline Infusion
2 mins
Anion Gap Metabolic Acidosis
- Pathophysiology
- Increased Anion Gap
- MUDPILES
- Methanol
- Uremia
- Diabetic Ketoacidosis (DKA)
- Propylene Glycol
- Isoniazid or Iron
- Lactic Acid
- Ethylene Glycol
- Salicylates
1 min
Metabolic Acidosis Interventions
- Interventions
- Raise Plasma pH > 7.20
- Treat Underlying Cause
- Sodium Bicarbonate
- Considerations
- Follow ABGs
- Continuously Monitor Patient
2 mins
Metabolic Alkalosis
- Diuretic use
- Vomiting
- Antacid
- Hyperaldosteronism
26 secs
Metabolic Alkalosis Interventions
- Interventions
- Treat Underlying Cause
- Stop Potassium (K+) Wasting Diuretics
- Spironolactone
- Acetazolamide
- IV Fluids
- Sodium Chloride
- Replace Potassium (K+)
- Considerations
- Monitor Respiratory Rate
- Monitor Heart Rate
- Seizure Precautions
2 mins
Respiratory Acidosis
- Hypoventilation
- Increased PaCO2 > 45
- Barbiturates Depress Central Respiratory Center of Brain
- Opioids Depress Central Respiratory Center of the Brain
- Airway Obstruction
- Respiratory Muscle Weakness/Paralysis
3 mins
Respiratory Acidosis Interventions
- Improve Respiration
- Pharmacologic Interventions
- Bronchodilators
- Respiratory Stimulants
- Drug Antagonists
- Nonpharmacologic Interventions
- Oxygen
- Assisted Ventilation
- Prevent Complications
1 min
Respiratory Alkalosis
- Hyperventilation
- High Altitude
- Aspirin
- Restrictive Lung Disease
- Pulmonary Embolism
- Pregnancy
- Progesterone
- Rib Fracture
- Anxiety
2 mins
Respiratory Alkalosis Interventions
- Treat Underlying Cause
- Mechanically Ventilated Patients
- Decrease Tidal Volume and/or Respiratory Rate
- Give Adequate Pain Control and Sedation
- Hyperventilation Syndrome
- Rebreathing into Paper Bag
- Sedatives
- Antidepressants
- Considerations
- Compensatory Drop in Serum Bicarbonate
- Correct CO2 Slowly
2 mins
Winter's Formula
- Evaluates Respiratory Compensation
- Used in Metabolic Acidosis
- Equation
- (HCO3 x 1.5 ) + 8 plus-minus 2 = PCO2
- Steps
- Bicarbonate (HCO3) x 1.5
- + 8
- ± 2
- = Expected Value for PCO2
2 mins
