3Singer AJ ,Richman PB,Kowalska A, et al. Comparison of pa- tient and practitioner assessments of pain from commonly per- formed emergency department procedures [J 1. Ann Emerg Med,1999,33(6) :652-658.
4Morrison RS, Ahronheim JC Morrison GR,et al. Pain and dis- comfort associated with common hospital procedures and expe- riences[J]. J Pain Symptom Manage, 1998,15(2) : 91-101.
5Singer AJ ,Konia N. Comparison of topical anesthetics and vas- oconstrictors vs lubricants prior to nasogastric intubation: a randomized, controlled trial[J]. Acad Emerg Med, 1999,6 (3) : 184-190.
6CP Chan,FL Lau. Should lidocaine spray be used to ease na- sogastric tube insertion? A double-blind, randomisedcon- trolled trial[J]. Hong Kong Med J, 2010,16 (4) : 282-286.
7()fir Uri MD, Lior Yosefov MD, Amir Haim MD, et al. Lido- caine gel as an anesthetic protocol for nasogastric tube inser- tion in the ED[J]. American Journal of Emergency Medicine, 2011,29(4) :386-390.
8James Ducharme, Kim Matheson. What Is the Best Topical An esthetic for Nasogastrie Insertion? A Comparison of Lido- eaine Gel, Lidoeaine Spray,and Atomized Cocaine[J]. J Emerg Nurs,2003,29(5) :427-430.
9Tapiawala SN,Riyami DA,Cole E. A painful and knotted na- sogastric tube[J]. CMAJ, 2008,178(5) : 568.
10Ya-Wen Kuo, Miaofen Yen, Susan Fetzer, et al. Reducing the Pain of Nasogastric Tube Intubation with Nebulized and At- omized Lidocaine: A Systematic Reviewand Meta-Analysis [J]. Journal of Pain and Symptom Management, 2010,40 (4) : 613-620.