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Children with obesity do not have more pain after surgery


While adults who have obesity often report more pain after surgery, the same does not appear to be true for children with obesity, according to the largest study of its kind, presented at the Anesthesiology 2018 annual meeting. The findings suggest the current protocol for managing pain in children after surgery - in which dosing is based on the patient's actual body weight, and not BMI or whether the child is considered to have obesity - should continue.

"There is some evidence that suggests adults who are obese might be extra sensitive to pain and therefore need more pain medication after surgery," said Dr M Alparslan Turan, an author of the study and physician anaesthesiologist at the Cleveland Clinic. "We didn't find that to be true of children, which suggests that those who fall into the obese category may not require higher doses of opioids as obese adults often do."

The protocol for managing pain in obese adults varies from institution to institution but typically is not based on weight, Turan noted.

The researchers analysed pain scores of 808 children (aged 8 to 18) who underwent non-cardiac surgery at the Cleveland Clinic between 2010 and 2015. Pain was assessed on a scale ranging from 0 (no pain) to 10 (worst pain imaginable). They compared the pain scores of children of various weights based on BMI: 59 were underweight, 513 were healthy weight, 106 were overweight and 130 had obesity. They determined that in the first 48 hours after surgery there was no correlation between BMI and pain for urologic, orthopaedic and general surgeries. There was a slight increase in pain of 0.06 points for every fifth percentile increase in BMI in the neurological group, but the difference was very small.

"We want to better understand the appropriate treatment for pain in the growing population of obese children who need surgery," said Dr Syed M Raza, lead author of the study and a clinical research assistant at the Cleveland Clinic Department of Anesthesia Outcomes Research. "Due to concerns about opioid use and abuse, there is a movement to provide children non-opioid pain medications, such as acetaminophen and ibuprofen to manage post-surgical pain. It is important for clinicians to be aware of these findings as they may indicate that patients with higher BMI do not require higher doses of pain medication such as opioids after surgery."

Researchers also found that opioid use actually decreased an estimated 0.3 percent for every fifth percentile increase in BMI, but the difference was miniscule and should not change protocol. Researchers said they were pleased that increased BMI did not result in increased need for the powerful narcotics.

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