Anesthetic Management for Elderly Obese Patients Undergoing Laparoscopic Surgery

Pre-Operative Considerations

The American Society of Anesthesiologists recommends reducing all induction doses by 30-50% from standard adult dosing due to age-related alterations in pharmacokinetic and pharmacodynamic profiles in elderly patients 1, 2.
Elderly patients over 74 years require a lower dose to induce anesthesia and have a longer onset time 1, 2.
The American Society of Anesthesiologists suggests implementing depth of anesthesia monitoring (BIS or entropy) to prevent excessive anesthetic depth and facilitate faster emergence in elderly patients 1, 2.
Obesity considerations include assuming significant sleep-disordered breathing and modifying technique accordingly, with a recommendation to position the patient in a 25-30 degree head-up (ramped) position for pre-oxygenation, induction, intubation, and throughout surgery 3, 4, 5, 6.

The Difficult Airway Society recommends using pressure-controlled ventilation with PEEP 8-10 cmH2O and recruitment maneuvers to reduce atelectasis in obese patients 5.
The American Society of Anesthesiologists suggests maintaining a slight sitting position (flexed trunk) during laparoscopy to allow increased abdominal excursion and lower airway pressures 5.
Calculating tidal volumes based on ideal body weight (6-8 mL/kg IBW) is recommended for obese patients 5.
The use of remifentanil is an excellent choice as a short-acting agent that facilitates rapid emergence, with a recommendation to implement multimodal opioid-sparing analgesia including local anesthetic infiltration by the surgeon 3, 4, 5, 6.

The Difficult Airway Society recommends using quantitative neuromuscular monitoring to aim for a train-of-four ratio >0.9 before extubation in obese patients 3, 4, 5, 6.
Sugammadex is preferred over neostigmine for complete and rapid reversal in obese patients 5.
The patient must be fully awake with return of airway reflexes before extubation, with a recommendation to extubate in a sitting position (45-90 degrees) 3, 4, 5, 6.

The American Society of Anesthesiologists recommends observing the patient unstimulated for a minimum of 1 hour for signs of hypoventilation, apnea, or hypopnea with oxygen desaturation in the post-anesthesia care unit (PACU) 3, 4, 6.
Continuous pulse oximetry monitoring is recommended until the patient is mobile postoperatively 3, 4, 5, 6.
Maintaining a head-up position throughout recovery is recommended for obese patients 3, 4, 5, 6.
The use of multimodal analgesia is recommended, considering PCA with caution, and may require level-2 monitoring if significant sleep-disordered breathing is suspected 3, 4, 6.