Chemotherapy Alters Cisatracurium Induced Neuromuscular Blockade Characteristics: A Prospective Cohort Study Publisher Pubmed



Zanjani AP¹ ; Maghsoudloo M¹ ; Makarem J¹ ; Farokhnia F² ; Fazli M³ ; Khan ZH²
Source: Journal of Clinical Anesthesia Published:2017

Abstract

Study objective To compare the characteristics of NMDR induced muscle paralysis in breast cancer patients with and without a history of recent chemotherapy with cyclophosphamide, doxorubicin and 5-fluorouracil (CAF) regimen. Design This is a non-randomized prospective cohort study. Setting Operating room of a university-affiliated teaching hospital. Patients Out of a total of 50 patients who had undergone mastectomy, 22 patients were allocated to the “Chemo group” and 28 patients to the “Non-Chemo group”, based on a valid history of recent chemotherapy. Intervention After induction of anesthesia with thiopental and cisatracurium, neuromuscular monitoring was started for all patients. Measurements Initially the time to 100% single-twitch (ST) suppression was measured. Then, the time for the appearance of the first response to post-tetanic count (PTC) stimulation, Train-of-Four (TOF) stimulation, and TOF50% were measured consequently. Main results Time to get STzero was significantly longer in the Chemo group than in the Non-chemo group. Time for the appearance of the first response of PTC and TOF and TOF50% was significantly shorter in the Chemo group than the other group. The mean duration of intense block was 27.66 minutes in the Chemo group versus 42.47 minutes in the Non-chemo group. Conclusion This research demonstrated that in patients having undergone chemotherapy, the effect of NDMRs starts with a longer lag time and finishes earlier too. Thus, these patients are ready for intubation after a longer time. Moreover, we have to repeat cisatracurium injections after shorter intervals to maintain the desired level of blockade. © 2016 Elsevier Inc.