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ORIGINAL ARTICLE
Year : 2020  |  Volume : 36  |  Issue : 3  |  Page : 366-370

Preemptive local anesthetic infiltration reduces opioid requirements without attenuation of the intraoperative electrical stapedial reflex threshold in pediatric cochlear implant surgery


1 Department of Anesthesia, Ain Shams University, Cairo, Egypt
2 Department of Otolaryngology, Ain Shams University, Cairo, Egypt
3 Software Test Engineer, MED-EL Medical Electronics, Cairo, Egypt

Correspondence Address:
Dr. Wahba Z Bakhet
4 Abdelhamed El Wardany street, El-Zeitoun, 11725, Cairo
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/joacp.JOACP_18_19

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Background and Aims: Total intravenous anesthesia using remifentanil provides good surgical condition without affecting the intraoperative electrical stapedial reflex threshold (ESRT). However, remifentanil results in hyperalgesia and increases postoperative opioid requirements. Local anesthetic infiltration is alternative methods to opioid for providing analgesia. However, otologists avoids its use as it can abolish the ESRT. We investigated the effect of the preemptive local anesthetic infiltration on intraoperative ESRT and opioid requirements in pediatric cochlear implant surgery performed under TIVA. Material and Methods: Prospective, randomized, double-blinded, controlled study including 70 child undergoing cochlear implant under TIVA were randomly assigned to a local anesthesia (LA group, n = 35) or control (CT group, N = 35). The primary outcome was the total tramadol consumption during the first 24 h postoperative, and the secondary outcomes were time to first analgesia request, postoperative pain scores, the ESRT and, propofol and remifentanil requirements. The incidence of postoperative vomiting was recorder as well. Results: The total tramadol consumption during the first 24 h after surgery was significantly less in the LA group than in CT group (8.25 [4.3] vs. 16.5 [6.57] mg, P< 0.01). The time to first analgesic request was significantly prolonged in the LA group as compared with the CT group [8 [2–12] vs. 3 [0–8] h, P< 0.01). The postoperative Faces, Legs, Activity, Cry Consolability pain scores were significantly lower in the LA group at 15 min, 30 min, 2, 4 and 6 h postoperative. Mean remifentanil infusion rate [mean (standard deviation)] was significantly higher in in the CT group than in the LA group [0.7 (0.3) vs. 0.5 (0.2) μg/kg/min; P= 0.001).The ESRT response, propofol requirements, and the incidence of postoperative vomiting had no significant differences between both groups. Conclusion: Preemptive local anesthetic infiltration reduced opioid requirements without attenuation of the ESRT in pediatric cochlear implant surgery performed under TIVA.


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