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Introduction: The opioid tolerant patient requiring surgery is highly likely to be discharged on high Oral Morphine Equivalent Daily Dosages (OMEDDs), with concomitant risk of increased morbidity and mortality. Objectives: We proposed that a single anaesthesiologist-led POPPMED (Peri-Operative Pain Management, Education & De-escalation) service could reduce both short and long-term postoperative patient OMEDDs. Methods: From April 2017, our anaesthesiologist-led POPPMED service, engaged 102 perioperative patients treated with >50mg preoperative OMEDDs. We utilized behavioural interventions; acute opioid reduction and/ or rotation; and regional, multimodal and ketamine analgesia to achieve lowest possible hospital discharge and long term OMEDDs. Results: Patients' preoperative OMEDDs were [median (IQR): 115mg (114mg)], and were representative of an older [age 62 (15) years], high-risk [89% ASA status 3 or 4] patient population. 46% of patients received an acute opioid rotation; 70% received ketamine infusions; and 44% regional analgesia. OMEDDs on discharge [-25mg (82mg), p=0.003] and at 6-12 months [-55mg (105mg ), p<0.0001] were significantly reduced; 84% and 87% of patients achieved OMEDD reduction on discharge and at 6-12 months. Patients with >90mg preoperative OMEDDs achieved greater reductions [discharge: 71% of patients, -52 mg (118 mg) p<0.0001; 6-12 months: 90% of patients, -90mg (115mg), p<0.0001]. On comparison with a pre-POPPMED surgical cohort, Postoperative Day 1-3 11-point Numerical Rating Scale (NRS-11) area under the curve (AUC) measurements at rest and on movement were not significantly different (largest NRS-11:hours AUC difference [median(IQR)] 22 [13], p= 0.24). Hospital length of stay was variably increased. Conclusions: POPPMED achieved sustained OMEDD reductions safely in an older, high-risk opioid tolerant population, with analgesia comparable to a non-POPPMED cohort, and surgery specific effects on length of stay.
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OBJECTIVE: The aim of this study is to ascertain the analgesic efficacy and total oral morphine equivalent daily dose (OMEDD) effect of a buprenorphine-based analgesic protocol in the treatment of severe Oral Mucositis (OM). DESIGN: This is a retrospective cohort study. SETTING: This study was done in a single Quaternary Referral Centre, Haematology Unit. SUBJECTS: Fifty-four stem cell transplant patients suffering at least grade 3 oral mucositis (OM), 24 prior to [Pr-I] and 30 subsequent to [Po-I] a buprenorphine-based OM analgesic protocol. METHODS: We analysed data from the above subjects with the primary outcome measure of difference in total OMEDDs from all opioid types and administration routes, and secondary outcome measures of area under the curve (AUC) of 11-point Numerical Rating Scale (NRS-11) pain assessments, sedation scores and respiratory rate. RESULTS: Post-protocol patients' total OMEDD requirements were significantly reduced [Pr-I: 1961 (1365)mg; Po-I: 928 (625)mg, p = 0.02], as were total NRS-11:hours AUC on swallowing [Pr-I: 54(24) score-hours; Po-I: 41(18) score-hours, p < 0.001]. There were no significant differences in objective measures of OM severity between groups (Number of Grade 3 or 4 OM severity assessments [mean (SD)] Pr-I: 5 (6.2); Po-I: 7 (5.1) or number of days Neutrophil count 0.0 or 0.1 × 109/L; Pr-I: 13 (5.4); Po-I: 15 (4.7)). 5 Pr-I and 4 Po-I patients required ketamine infusions, with 1 Pr-I patient also requiring IV lignocaine. CONCLUSIONS: Use of Buprenorphine via transdermal, sublingual and intravenous Patient Controlled Analgesia (PCA) delivery as part of an analgesic protocol for severe post stem cell transplant oral mucositis in adult patients appears to significantly reduce opioid requirements and pain on swallowing. Further randomised prospective work is required to confirm these associations.