• Qiang Liu, Xiao-Min Chai, Jun-Jun Zhang, Yi-Ling Wang, Yu Wang, Lu-Lu Gao, Ya-Liang Dai, Hai-Xiang Gao, Ting-Ting Zhang, Jian-Qiang Yu, and Yu-Xiang Li.
• School of Nursing, Ningxia Medical University, Yinchuan, China; Ningxia Key Laboratory of Cerebrocranial Diseases, Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China.
• J Pain Symptom Manage. 2019 Jun 1; 57 (6): 1043-1050.

ContextLeukemia is the most common cancer in the childhood population. Lumbar puncture (LP) plays central role in the diagnosis and treatment process, but options for analgesia are limited.ObjectivesThe present study aims to evaluate the efficacy of a fixed N2O/O2 mixture to reduce pain in children with leukemia during LP as compared with placebo.MethodsA double-blind, placebo-controlled, and randomized clinical trial involving children who needed LP for diagnosis or treatment was conducted in the pediatrics department of the General Hospital of Ningxia Medical University. Eligible patients were randomly assigned to inhale either a fixed N2O/O2 mixture or O2. The primary endpoint was the maximal pain level felt by the patient during the procedure measured using a numerical rating scale (0-10).ResultsOne-hundred fourteen consecutive patients were enrolled in this study and randomized. Pain scores during the procedure showed a significant decrease in N2O/O2 mixture-treated patients to 1.05 ± 1.40 versus 8.00 ± 2.13 in controls (P < 0.01). No serious adverse effects were attributed to N2O/O2 mixture inhalation. Analysis of the satisfaction of patients receiving N2O/O2 mixture indicated that medical staff were satisfied with this treatment.ConclusionsThis study demonstrated that self-administered fixed N2O/O2 is efficient to reduce pain related to LP in children with leukemia.Copyright © 2019 American Academy of Hospice and Palliative Medicine. Published by Elsevier Inc. All rights reserved.

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