A Prospective Pilot Study of a Non-Narcotic Post-Operative Course After Colectomy

A Prospective Pilot Study of a Non-Narcotic Post-Operative Course After Colectomy

With this pilot investigation, the investigators aim to challenge the reliance on opiate analgesia following colon and rectal surgery. Narcotic misuse and abuse is a pressing public health concern, and reduction in prescription rates could help to mitigate this issue. The goal of this pilot study is to establish feasibility of sufficient post-operative pain control after colectomy using non-narcotic analgesics. The investigators hypothesize that patients will be able to manage their post-operative pain without narcotic intervention, while minimizing side effects and complications. This initial pilot study will provide proof-of-concept for a larger, randomized investigation on non-narcotic analgesia after colectomy.

Our primary objectives are:

• Determine the rate of patients needing rescue narcotics prescriptions for breakthrough postoperative pain after colectomy while on a non-narcotic postoperative protocol.
• Search for patterns pain and in timing of need for narcotic medication (e.g. in PACU, after intrathecal morphine wear off, etc.)

Secondary objectives:

• Measure patient satisfaction with pain management via survey administered at discharge and during the 30 days post-operation. This will include questions regarding medication side-effects.
• Determine factors that may affect patient need for narcotic pain medication, including complications (return to OR, anastomotic leak, prolonged ileus, post-operative hemorrhage), return of bowel function, side effects of medications, and length of hospital stay, which will be taken from patients' charts and surveys for analysis.

Procedures:

At their initial clinic visit for surgical scheduling, patients will be explained appropriate risks and benefits of participating in this pilot program. If interested, patients will choose to opt in to the protocol and consent to participate at this time. Pre-operatively, patients will adhere to the Enhanced Recovery After Surgery (ERAS) protocol in standard use at UVMMC for colectomy patients. This protocol includes administration of gabapentin (900 mg capsule), acetaminophen (1,000 mg tablet), dexamethasone (8 mg intravenously), granisetron (1 mg intravenously), and morphine (0.15 mg intrathecally). Appropriate medications will be administered at the discretion of the treating anesthesiologist during colectomy, but ketamine use will be encouraged if not contraindicated. Following the completion of colectomy, patients will only be given oral acetaminophen (650 mg, every 4 hours), gabapentin (300 mg, every 6 hours), methocarbamol (750mg, 4 times daily), and 5% lidocaine pat (every 12 hours, as needed), for analgesia from their stay in the PACU onwards. A one-time opioid rescue prescription for hydromorphone, morphine, or oxycodone will be available for breakthrough pain during their hospital stay. This differs from standard ERAS post-operative pain management, where hydromorphone, morphine, or oxycodone can be administered as needed. If a patient uses the one-time rescue dose, the covering physician will be notified and can then choose to order an appropriate narcotic regimen for the remainder of the patient's hospitalization. All patients will be discharged with a narcotics prescription that they can choose to fill. Throughout their hospitalization, patients will be asked to provide their pain level on the Visual Analog Scale (VAS) per typical protocol. At discharge, they will be given instructions for weaning pain medications at home. They will also be provided a medication diary, where they will record their pain levels, the time of administration of pain medications, and the name of the medications being administered. A patient satisfaction survey will be provided with the medication diary. The patient will be instructed to fill out the survey when they return home after discharge and to return the survey with their medication diary at their first follow up visit. An automated telephone call will occur daily for 1 week after discharge to remind the patient to record their pain level and medication use in the medication diary. At the patient's follow-up clinic visit, which occurs 3-4 weeks after discharge, the patient will bring their completed medication diary and first satisfaction survey. At this visit, a second patient satisfaction survey will be completed.

Outcome measures will be monitored through use of the rescue prescription while hospitalized, as well as self-reported surveys measuring post-operative pain, protocol side effects, and satisfaction of pain control, which will be given to the patients at discharge and at a follow-up clinic visit. Information on return of bowel function, length of hospital stay, and other medical complications will be gleaned from the patients' charts. Analysis of outcomes will be performed with the aid of a statistician.

Inclusion Criteria:

• ≥ 18 years of age
• Undergoing elective abdominal colectomy
• Eligible for the Enhanced Recovery After Surgery (ERAS) protocol currently in place for colectomy patients at UVMMC

Exclusion Criteria:

• allergy to any protocol medication
• emergent or urgent bowel surgery
• pre-operative plan for a stoma
• pre-operative diagnosis of rectal cancer (pre-operative diagnosis of rectosigmoid cancer is not necessarily excluded)
• neoadjuvant chemoradiation
• additional malignant disease outside of the colon
• narcotic usage within the three months of scheduled operation date, for more than one week
• chronic pain
• pain score >2 at the initial evaluation for study inclusion
• dementia

Note: Eligibility will be determined by the research coordinator and approved by the surgeon