Postoperative analgesia in a morbidly obese patient with chronic renal failure

The number of surgical interventions performed in obese patients has recently been increasing. Anaesthesia in a morbidly obese patient may be difficult, due to many pathophysiologic changes and co-morbidities, together with altered pharmacokinetics and pharmacodynamics of anaesthestic agents. We present a case of multimodal preventive analgesia in a bariatric patient with chronic renal failure.

A 36-year-old, morbidly obese man (BMI 47.8 kg m-2) was scheduled for a laparoscopic adjustable gastric banding (LAGB). The anaesthetic risk was increased because of hypertension, chronic renal failure, steatohepatitis and obstructive sleep apnoea syndrome. 30 minutes before anaesthesia, the patient received 2 g iv paracetamol. After induction, he was given 8 mg dexamethasone and 100 mg tramadol. All port-sites were infiltrated with 0.5% bupivacaine and adrenaline, both before skin incision, and before wound closure. Since NSAIDs and opioids were contraindicated because of the patient's co-morbidities, postoperative analgesia consisted of tramadol and paracetamol, given alternately, every 3 hours. The patient was discharged home 28 hours after surgery.

According to the Polish Postoperative Pain Management Recommendations 2008, the pain after LAGB is multifactorial and rated as category 2. The pre-emptive analgesia and postoperative regimen presented in this case can be recommended in similar cases.