Post-operative Pain Control After Pediatric Adenotonsillectomy

Post-operative pain management in pediatric patients undergoing adenotonsillectomy is challenging not only for the child, but also for the clinician and caregiver. Uncontrolled pain carries a high level of morbidity and can result in prolonged hospital stay and/or readmission, dehydration, weight loss, and other undesirable effects. In light of recent high-profile controversies regarding the safety of codeine the search for effective and safe analgesia continues. The American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS) guidelines suggest that NSAIDs are safe to use in the post-operative period. Here, the investigators compare bleeding risk and pain control using acetominophen-hydrocodone (control) versus ibuprofen (intervention) in the post-operative period in pediatric patients undergoing adenotonsillectomy. The investigators hypothesize that ibuprofen will not be associated with increased bleeding risk and will control post-operative pain as well as acetominophen-hydrocodone.

Initial retrospective chart review (Data to be extracted from the patients' charts):

• Demographic data
• Surgical data
• Postoperative data
• Descriptive analysis to determine incidence of postoperative bleeding following adenotonsillectomy and its relation to demographic factors or surgical factors, incidence of postoperative pain problems and relation to demographic or surgical factors.

Prospective, randomized, single-blind trial:

• Study Group Allocation/Randomization: Study participants will be randomized into two post-operative pain medication treatment arms, using block randomization. Patients who are randomized into the test intervention arm will receive ibuprofen (10mg/kg/day every 6-8 hours) after surgery. Patients who are randomized into the control intervention will receive hydrocodone-acetaminophen (0.15mg/kg/day every 4-6 hours). This randomization will be performed by Ansley Roche MD, a co-investigator. The operating surgeons will be unaware of the group assignments at the time of randomization, at the time of surgery, and in the post-operative period. (The participant and caregiver will not be blinded to the type of post-operative pain medication they will receive.) Once a study participant has been randomized to group, the group assignment information will be provided to the otolaryngology resident at Egleston. The resident will write the appropriate prescription and provide this to the patient's family prior to discharge.
• Postoperative pain assessment: Using the Faces Pain Scale , the pediatric patient will indicate his/her pain level at scheduled intervals. Pain level will be recorded by the caregiver and pain medication will be administered appropriately based on level of patient's self-reported pain. A log of pain medication administered will be kept for each dose given. The total amount of pain medication administered per kg per day will be calculated by the study staff upon completion of the pain medication logs. Prior to surgery, a member of the study team will conduct a brief standard training session for parents to teach them how to correctly complete the medication log.
• Breakthrough pain: Patients who are randomized into the test intervention arm will receive ibuprofen (10mg/kg/day every 6-8 hours) after surgery. Patients who are randomized into the control intervention will receive hydrocodone-acetaminophen (0.15mg/kg/day every 4-6 hours). Both post-operative intervention groups in this study will have surgery for the same preoperative indications (adenotonsillitis or sleep disordered breathing). If patients experience pain that is not controlled with the specified intervention group medication, there will be a protocol in place for breakthrough pain, as indicated below. Surgeons will be blinded to the intervention arm. For patients who have pain that is not controlled by the randomized intervention, a breakthrough pain protocol will be enacted. The protocol is as follows:
• Test intervention arm

1. Give hydrocodone-acetaminophen (0.15mg/kg/day hydrocodone) for pain score ≥6 no more than ever 6 hours. If uncontrolled pain, see next bullet point.
2. Increase hydrocodone-acetaminophen dose to 0.2mg/kg/day hydrocodone per dose.

• Control intervention arm

1. Increase dose of hydrocodone-acetaminophen to 0.2 mg/kg/day hydrocodone For pain score ≥ 6. If uncontrolled pain, see next bullet point.
2. Ibuprofen 10mg/kg/day no more than every 6 hours. If uncontrolled pain, see next bullet point.
3. Acetaminophen 10mg/kg/day every 6 hours as needed.

Implementation of the breakthrough pain protocol will be documented. In order to maintain surgeon blinding throughout the study, patient phone calls will be routed to the chief resident on call who will follow the above breakthrough pain protocol.

A study staff member, excluding the surgeon, will contact parents/caretakers on post-operative day 3 and post-operative day 7 to assist with medication log completion and answer medical questions.