Efficacy of Topical Ethyl Chloride Spray versus Subcutaneous 1% Lidocaine Injection in Reducing Pain from One Rod System Implant Insertion

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Monthinee Techasomboon
Rujira Wattanayingcharoenchai
Jittima Manonai Bartlett
Komkrit Aimjirakul


Objectives: To compare the efficacy of topical ethyl chloride spray and subcutaneous 1% lidocaine injection in reducing pain from one rod system implant insertion.
Materials and Methods: Eighty-four women undergoing one rod implant insertion during February 2014 to December 2015 were enrolled and randomly allocated to ethyl chloride spray and 1% lidocaine injection groups. After skin was sterilized, the assigned anesthetic method was administered before insertion of one rod implant according to the standard pro-cedure. Pain during anesthetic administration, implant insertion, 20 min after insertion, and overall pain were evaluated, using a 100-mm visual analogue scale (VAS). Patient and doctor satisfaction were measured using a five-point Likert scale.
Results: All basis clinical characteristics between two groups did not differ. There was no significant difference in VAS during and 20 min after implant insertion between 2 anesthetic groups (p > 0.05). Median VAS during anesthetic administration and overall pain in ethyl chloride spray group (1.50 and 1.60) were significant lower than lidocaine injection group (3.75 and 2.75) (p < 0.01). Patient and doctor satisfaction scores were significant higher in ethyl chloride spray group (p < 0.05).
Conclusion: Ethyl chloride spray can be used as anesthetic option for one rod system implant insertion. It provides comparable analgesic effect to lidocaine injection but with less pain from anesthetic administration.

Keywords: ethyl chloride spray, lidocaine, one rod system implant


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