Source / episode info
- **Episode:**385
- **Title:**Divine Intervention Episode 385 – Anesthetic Complications and The USMLEs (Ultra HY for Step 2CK and Step 3)
- **Published:**2022-04-19
- Source:Episode page
One-liner
Episode 385 is a comprehensive review of anesthetic complications, covering the management of tension pneumothorax and persistent air leaks, recognizing Malignant Hyperthermia triggers (depolarizing agents), optimizing care for OSA patients, managing opioid-induced respiratory depression, and adhering to critical cardiac pre-operative guidelines.
High-yield summary
- Tension Pneumothorax: Clinical triad includes unilateral decreased breath sounds, hypotension, and hemodynamic instability. Immediate management requires a needle decompression (or needle thoracostomy) followed by chest tube placement.
- Malignant Hyperthermia (MH): A life-threatening hypermetabolic crisis triggered by exposure to volatile anesthetics or depolarizing muscle relaxants (e.g., succinylcholine). It is associated with mutations in the ryanodine receptor.
- OSA Management: Patients with OSA require pre-operative screening using the STOP-BANG questionnaire. Intra-operatively, general anesthesia should be avoided if possible; use of CPAP/BiPAP and limiting opioids are key preventative measures.
- Opioid Respiratory Depression: Characterized by hypoventilation leading to respiratory acidosis (high {PaCO}_2). The primary reversal agent is Naloxone. Assessment of consciousness uses the RASS scale.
- Cardiac Pre-op Care: For patients with pre-existing cardiac disease, beta-blockers should continue if already prescribed; they should never be initiated newly in the perioperative period due to increased risk.
Learning objectives
- Identify the signs and immediate management steps for tension pneumothorax.
- Recognize the triggers, pathophysiology, and metabolic consequences of Malignant Hyperthermia (MH).
- Apply appropriate pre-operative risk assessment tools (e.g., STOP-BANG) for patients with OSA.
- Determine the correct initial treatment for opioid-induced respiratory depression.
- Understand the principles of perioperative cardiac optimization, particularly regarding beta-blocker management and timing of surgery post-MI.
Board exam buzzwords