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Jul 2017, Vol 5, Issue 3
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Original Article
Nitrous Oxide versus Lidocaine for Pain Relief during Episiotomy Repair – A RandomisedTrial
Nahid Javadifar1, Azam Honarmandpour2, Zahra Abbaspoor1, Amal SakiMalehi3
1Assistant Professor of Reproductive Health Promotion Research Centre, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
2Department of Midwifery, Shushtar Faculty of Medical Sciences,Shushtar, Iran
3Department of Biostatistics and Epidemiology, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

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Keywords : Nitrous Oxide, Episiotomy, lidocaine, Pain
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Objectives: Since pain reduction is an important concern in child birth, this study was designed to evaluate the effects of nitrous oxide in comparison with lidocaine in terms of pain relief, during episiotomy repair in nulliparous women.

Materials and Methods: A prospective randomized controlled trial method was used in this study and 120 term pregnant women were recruited. The intervention group received nitrous oxide two minutes before starting episiotomy repair, until the end of the procedure. The control group received 5 ml of Lidocaine (2%) before starting the episiotomy. The results of the two groups were compared with regard to pain intensity using a visual analogue scale (VAS). Mann-Whitney, student’s t-test and Chi square test were used to analyze the data.

Results: Sixty women were studied in each group. Nine participants (15%) in nitrous oxide group as opposed to 23 (38.4%) in lidocain group had moderate, severe or extremely severe pain intensity (P value= 0.005). In terms of satisfaction level, there was no significant difference between two groups (P value =0.713).

Conclusion: The results of this study showed that pain intensity in the nitrous oxide group was significantly lower than that inthe lidocain infiltration group. Application of nitrous oxide at least 2 minutes before repair may be a useful method for pain management in episiotomy repair.

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