Stoelting's Anesthesia and Co-Existing Disease · 8th Edition
Psychiatric Disease, Substance Use Disorders, and Drug Overdose
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ⓘ This audio and summary are simplified educational interpretations and are not a substitute for the original text.
Key Takeaways
- Serotonin syndrome results from excess serotonergic activity and manifests as agitation, autonomic instability, and hyperreflexia with potential mortality if unrecognized.
- Lithium maintenance requires careful perioperative monitoring because narrow therapeutic windows exist and the drug prolongs neuromuscular blockade effects.
- Neuroleptic malignant syndrome is a psychiatric emergency triggered by antipsychotics, presenting with severe hyperthermia, muscle rigidity, and altered consciousness.
- Alcohol withdrawal progresses to delirium tremens characterized by autonomic hyperactivity, hallucinations, and seizures requiring benzodiazepine management and thiamine supplementation.
- Opioid-dependent patients must continue maintenance medications perioperatively to prevent acute withdrawal syndrome and adequately treat postoperative pain.
- Cocaine intoxication causes sympathomimetic crisis with myocardial ischemia, dysrhythmias, and hypertensive emergency posing significant perioperative cardiovascular risks.
Chapter SummaryWhat this audio overview covers
Psychiatric disorders and substance use conditions present complex perioperative challenges requiring specialized anesthetic management strategies and careful medication consideration. Major depression, affecting a substantial portion of the population, involves persistent disturbances in mood regulation and is treated with selective serotonin reuptake inhibitors, serotonin-norepinephrine reuptake inhibitors, tricyclic antidepressants, and monoamine oxidase inhibitors. A critical concern with these medications involves serotonin syndrome, a potentially fatal hyperserotoninergic state manifested by agitation, autonomic instability, and heightened reflexes. Bipolar disorder management centers on lithium therapy, which operates within a narrow therapeutic range and prolongs neuromuscular blocker effects while potentially reducing anesthetic requirements. Psychotic disorders treated with antipsychotic agents carry risks of cardiac conduction abnormalities and neuroleptic malignant syndrome, a life-threatening complication characterized by extreme hyperthermia and muscular rigidity. Electroconvulsive therapy, reserved for treatment-resistant depression, requires anesthetic induction that preserves seizure activity while attenuating dangerous muscular contractions. Substance use disorders encompassing alcohol, cocaine, opioids, benzodiazepines, and barbiturates each demand specific perioperative protocols to prevent withdrawal syndromes, manage cardiovascular complications, and maintain adequate analgesia. Alcohol withdrawal presents delirium tremens as a medical emergency, while cocaine intoxication precipitates myocardial ischemia and dysrhythmias through intense sympathomimetic activation. Opioid-dependent patients maintained on buprenorphine or methadone require continuation of these medications perioperatively to prevent withdrawal and pain escalation. Toxicological emergencies including acetaminophen overdose, organophosphate poisoning, and carbon monoxide exposure demand immediate recognition and targeted interventions. Anesthesia professionals demonstrate elevated addiction prevalence due to occupational access to potent synthetic opioids, highlighting vulnerability within the specialty. Understanding the physiologic interactions between psychiatric medications, substances of abuse, and anesthetic agents is essential for optimizing patient safety and therapeutic outcomes across diverse clinical presentations.