Colonic Resection, Low Anterior Resection, Abdominoperineal Operation

All best practices are subject to change and may require modifications depending on a patient’s history and status. Healthcare practitioners should always defer to their clinical judgement and, whenever appropriate, consult with additional resources for further guidance.

Preoperative	Intraoperative	Postoperative (Inpatient)	Discharge Strategies
•Acetaminophen •NSAIDs (consider selective COX-2 inhibitors for fewer side effects) •Gabapentinoids (single, low-dose, adjust dose or consider the risk-benefit in elderly & patients w/ renal dysfunction)^ •Consider regional anesthesia ...oOpen: Low thoracic/lumbar epidural, transversus abdominis plane block ...oLaparoscopic: Spinal with long-acting opioids	•IV acetaminophen/ NSAIDs if not given preop •Magnesium sulphate •Consider IV ketamine bolus plus infusion 0.1-0.3mg/kg •Consider IV lidocaine bolus (1-1.5mg/kg) plus infusion at 0.5-1.5mg/kg/hr if no thoracic epidural analgesia •Infiltration of local anesthesia at surgical site •Consider dexmeditomidine infusion	•Acetaminophen •NSAIDs (consider selective COX-2 inhibitors for fewer side effects) •Continue epidural; if no epidural: ...oIV lidocaine x 24-48hrs OR ...oTransversus abdominis plane blocks +/- IV PCA, transition to PO in 24-72hrs	MANAGEMENT OF PAIN W/O MEDICATION: •Physiotherapy (if delayed return of physical function) •Relaxation techniques (breathing, meditation, mindfulness, etc.) •Consider heat packs CO-ANALGESICS: •Acetaminophen •NSAIDs (consider selective COX-2 inhibitors for fewer side effects and a prescription for increased compliance) •Resume routine medication unless advised not to by physician OPIOID PRESCRIPTION: 0-15 tablets*

^Gabapentinoids are often recommended for acute pain management in certain surgeries based on small studies. However, based on recent systematic reviews and meta-analysis there is limited evidence to support universal use. A provider’s clinical judgement is recommended on an individual case basis.

*Opioid tabs are based on 5mg oral morphine. To convert this dosage, please visit this page. We encourage prescribers to consider discharge prescriptions of short-acting opioids at the lowest effective dose, with the lowest potency, for the shortest duration.

Before surgery, and at the surgical safety checklist time, the surgical and anesthesia team should work together to develop a multimodal pain management plan with active strategies to optimize perioperative pain management.

Healthcare practitioners are also encouraged to help patients set realistic expectations around pain management, including the use of prescription medications. Additional useful information to enhance recovery after surgery can be found at Enhanced Recovery Canada.

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Bicket MC, Long JJ, Pronovost PJ, Alexander GC, Wu CL. Prescription Opioid Analgesics Commonly Unused After Surgery: A Systematic Review. JAMA Surg. 2017 Nov 1;152(11):1066-71.
Felix MMDS, Ferreira MBG, da Cruz LF, Barbosa MH. Relaxation Therapy with Guided Imagery for Postoperative Pain Management: An Integrative Review. Pain Manag Nurs. 2019 02;20(1):3-9.
Gustafsson UO, Scott MJ, Hubner M, Nygren J, Demartines N, Francis N, et al. Guidelines for Perioperative Care in Elective Colorectal Surgery: Enhanced Recovery After Surgery (ERAS®) Society Recommendations: 2018. World J Surg. 2019 Mar;43(3):659-95.
Howard R, Waljee J, Brummett C, Englesbe M, Lee J. Reduction in Opioid Prescribing Through Evidence-Based Prescribing Guidelines. JAMA Surg. 2018 03 1;153(3):285-7.
Verret M, Lauzier F, Zarychanski R, Perron C, Savard X, Pinard AM, et al. Perioperative Use of Gabapentinoids for the Management of Postoperative Acute Pain: A Systematic Review and Meta-analysis. Anesthesiology. 2020 08;133(2):265-79.
Zeidan F, Emerson NM, Farris SR, Ray JN, Jung Y, McHaffie JG, et al. Mindfulness Meditation-Based Pain Relief Employs Different Neural Mechanisms Than Placebo and Sham Mindfulness Meditation-Induced Analgesia. J Neurosci. 2015 Nov 18;35(46):15307-25.
Zeidan F, Martucci KT, Kraft RA, Gordon NS, McHaffie JG, Coghill RC. Brain Mechanisms Supporting the Modulation of Pain by Mindfulness Meditation. J Neurosci. 2011 Apr 6;31(14):5540-8.

Treatment Altering Factors

Below are a few of the more common and/or impactful health factors that may result in deviation from the above best practices. Please note that the following list is not exhaustive and that the remarks for each factor are not surgery-specific. Healthcare practitioners should always defer to their clinical judgement and, if appropriate, consult with additional resources for further guidance. See our full disclaimer here.

Organ Dysfunction


•In general: Limit or avoid acetaminophen altogether, depending on degree of hepatic dysfunction •Preoperative: Avoid or reduce dose of acetaminophen •Intraoperative: Decrease dose of opioids, benzodiazepines, meperdine •Postoperative: Reduce dose of acetaminophen •Discharge: Lower daily maximum dose of tramadol and increase dosing interval; avoid codeine


•In general: Limit or avoid NSAIDs altogether, depending on degree of renal dysfunction •Preoperative: Avoid NSAIDs and use gabapentinoids cautiously •Intraoperative: Avoid morphine and meperidine •Postoperative: Avoid NSAIDs and use lower dose of gabapentin •Discharge: Lower daily maximum dose of tramadol and increase dosing interval; avoid codeine

Patient Specific Factors

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•Preoperative: Due to the frequency of multiple comorbidities in advanced age, anesthesia preoperative consult as needed to preoptimize. Also, manage anticoagulants where indicated; avoid long delays in hip fracture patients and practice preemptive analgesia •Intraoperative: Regional anesthesia and peripheral nerve blocks preferable where indicated •Postoperative: Regular dose acetaminophen; oral NSAIDs where indicated •Discharge: Consider minimum amount of opiates based on the surgical procedure, age and comorbidities

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•Preoperative: Due to the frequency of multiple comorbidities in advanced age, anesthesia preoperative consult as needed to preoptimize. Also, manage anticoagulants where indicated; avoid long delays in hip fracture patients and practice preemptive analgesia
•Intraoperative: Regional anesthesia and peripheral nerve blocks preferable where indicated
•Postoperative: Regular dose acetaminophen; oral NSAIDs where indicated
•Discharge: Consider minimum amount of opiates based on the surgical procedure, age and comorbidities


•In general: May attempt to wean chronic opioids if surgery is to treat issues contributing to the chronic pain but otherwise continue chronic pain medication perioperatively if patient uses it •Preoperative: Anesthesia consult where indicated; continue preop opioids on day of surgery and give preemptive analgesia •Intraoperative: Regional anesthesia and peripheral nerve blocks preferable where indicated; use a multi-modal opioid sparing approach; may require higher doses of opioids to account for tolerance •Postoperative: Use a multi-modal opioid sparing approach; may require higher doses of opioids to account for tolerance; regular dose acetaminophen and oral NSAIDs where indicated •Discharge: Consider minimum amount of opiates based on the surgical procedure, age and comorbidities and avoid opioid dose escalation from preop, if possible

•In general: May attempt to wean chronic opioids if surgery is to treat issues contributing to the chronic pain but otherwise continue chronic pain medication perioperatively if patient uses it

•Preoperative: Anesthesia consult where indicated; continue preop opioids on day of surgery and give preemptive analgesia
•Intraoperative: Regional anesthesia and peripheral nerve blocks preferable where indicated; use a multi-modal opioid sparing approach; may require higher doses of opioids to account for tolerance
•Postoperative: Use a multi-modal opioid sparing approach; may require higher doses of opioids to account for tolerance; regular dose acetaminophen and oral NSAIDs where indicated
•Discharge: Consider minimum amount of opiates based on the surgical procedure, age and comorbidities and avoid opioid dose escalation from preop, if possible


•Consider regional anesthetic techniques, if feasible for specific surgical procedure


•Preoperative: Consider anxiolytics prior to administration of anesthetic •Discharge: While reviewing expected duration of opioid use, as well as opioid safety strategies including the appropriate storage and disposal of unused pills, should be standard practice, it is of paticular importance with patients who have uncontrolled anxiety/depressive symptoms Special note for paediatric surgeries: Given the risk of opioid misuse in youth with depressive symptoms, consider heightened opioid safety factors including reviewing with caregivers at discharge

•Preoperative: Consider anxiolytics prior to administration of anesthetic
•Discharge: While reviewing expected duration of opioid use, as well as opioid safety strategies including the appropriate storage and disposal of unused pills, should be standard practice, it is of paticular importance with patients who have uncontrolled anxiety/depressive symptoms

Special note for paediatric surgeries: Given the risk of opioid misuse in youth with depressive symptoms, consider heightened opioid safety factors including reviewing with caregivers at discharge

System Disorders


•Avoid neuraxial techniques if any abnormal coagulation; consider following ASRA guidelines


•Preoperative: Use multi-modal analgesia; reduce or avoid use of gabapentinoids •Intraoperative: Reduce or avoid benzodiazepines; reduce doses of opioid medications •Postoperative: Use multi-modal analgesia; reduce use of opioids and gabapentinoids •Discharge: Reduce opioid dosing

References for Treatment Altering Factors

Patient Resources

Best Practices

Colonic Resection, Low Anterior Resection, Abdominoperineal Operation

Treatment Altering Factors

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