Perioperative Pain Management in Morbid Obesity

Area of Science:

• Anesthesiology
• Pharmacology
• Critical Care Medicine

Background:

• Morbid obesity (MO) is a growing global health concern, leading to physiological changes and comorbidities that complicate perioperative pain management.
• Traditional opioid-based pain relief in MO patients increases risks of respiratory depression and mortality, especially given their higher incidence of sleep-disordered breathing.
• Altered physiology in MO impacts drug metabolism and distribution, necessitating tailored pain management strategies.

Purpose of the Study:

• To provide an evidence-based update on perioperative pain management in morbidly obese (MO) patients.
• To discuss the challenges and strategies for managing pain in MO patients, focusing on opioid-sparing approaches.
• To highlight the importance of standardized protocols and future research directions in this area.

Main Methods:

• This review synthesizes current literature on obesity-associated physiological changes and their effects on pain pharmacology.
• It examines evidence supporting multimodal analgesia and opioid-sparing techniques for MO patients.
• The review discusses pharmacological and non-pharmacological interventions for nociceptive and pro-nociceptive pain components.

Main Results:

• Multimodal analgesia, emphasizing step-wise, severity-based, and opioid-sparing approaches, can enhance safety and outcomes in MO patients.
• Standardized perioperative pain management protocols are recommended for MO patients.
• Identification and treatment of hyperalgesia and other pro-nociceptive factors are important components of acute pain management.

Conclusions:

• Standardized, opioid-sparing multimodal analgesia protocols are essential for safe and effective perioperative pain management in morbidly obese patients.
• Extended monitoring for respiratory adverse events may be necessary for some MO patients postoperatively.
• Further research is needed to optimize acute pain management strategies for this growing patient population.