Evaluation of the effect of perioperative administration of S(+)-ketamine hydrochloride injection for postoperative acute pain in children: study protocol for a prospective, multicenter, randomized, open-label, parallel-group, pragmatic clinical trial

Hong Wang, Chongyang Duan, Jianmin Zhang, Shuangquan Qu, Ying Sun, Lizhi Zhou, Lujia Yang, Chen Lan, Weidong Mi, Pingyan Chen, Hong Wang, Chongyang Duan, Jianmin Zhang, Shuangquan Qu, Ying Sun, Lizhi Zhou, Lujia Yang, Chen Lan, Weidong Mi, Pingyan Chen

Abstract

Background: Inadequate postoperative pain management increases the risk of adverse events after the surgery and aggressive perioperative pain prevention has both short-term and long-term benefits. S(+)-ketamine is an N-methyl-D-aspartic acid (NMDA) receptor antagonist with a strong analgesic effect and can significantly relieve postoperative acute pain and reduce opioid consumption. However, for children, it still needs to be confirmed by large sample clinical studies.

Methods: This is a pragmatic, randomized controlled trial which will evaluate the effect of perioperative administration of S(+)-ketamine hydrochloride injection for postoperative acute pain in children in a pragmatic clinical setting. A total of 3000 children (≤17 years old) undergoing surgery will be included in this protocol. Subjects will be randomized 2:1 to either receive S(+)-ketamine hydrochloride injection or conventional therapy without S(+)-ketamine during the entire perioperative period. The primary endpoints are the area under the receiver operating characteristic (ROC) curve of Face Legs Activity Cry and Consolability (FLACC, 0-7 years old) scale score or Numerical Rating Scale (NRS, 8-17 years old) score within 48 h after surgery, and the consumption of opioids within 48 h after surgery. The secondary endpoints include the time of first use of rescue analgesics after surgery, rescue analgesia rate within 48 h after surgery, anesthesia recovery time, incidence of emergency delirium (for 0-7 years old), changes of anxiety and depression scale scores at 48 h after surgery (for 8-17 years old), incidence of intraoperative adverse events (AEs), and incidence of postoperative AEs and pharmacoeconomic indicators. AEs and serious AEs were recorded to evaluate safety.

Discussion: This trial will be the first pragmatic clinical trial to prospectively assess the effect of perioperative administration of S(+)-ketamine hydrochloride injection for postoperative acute pain in children, which is of great significance to the continuous optimization of clinical anesthesia and analgesia programs for children.

Trial registration: This trial was registered in the U.S. National Institutes of Health ClinicalTrials.gov database ( https://ichgcp.net/clinical-trials-registry/NCT04834427" title="See in ClinicalTrials.gov">NCT04834427). Registered on 8 April 2021.

Keywords: Acute pain; Analgesia; Anesthesia; Children; Esketamine; Ketamine; Perioperative period; Postoperative pain; S(+)-ketamine; S(+)-ketamine hydrochloride.

Conflict of interest statement

The authors declare that they have no competing interests.

© 2022. The Author(s).

Figures

Fig. 1
Fig. 1
Participant flow

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