بررسی و مقایسه تأثیر استنشاق رایحه اسطوخودوس بر میزان تهوع و استفراغ پس از جراحی فتق شکمی (مطالعه کارآزمایی بالینی)

Introduction: Nausea and vomiting after surgery are the most common complications associated with surgical procedures. This study has been done to evaluate the effect of inhalation of lavender aroma on nausea and vomiting after ventral hernia surgery.  Methods: In this RCT study, 110 patients with ventral hernia surgery were selected and randomly assigned in intervention (55 patients) and control (55 patients) group. For each of samples in the intervention group, oxygen was administered using face mask at a flow rate of 6 liters per minute (LMP) in combination with lavender essential oil for 20 minutes, and in control group oxygen container contained pure distilled water. Immediately after leaving the recovery, 2, 6 and 24 hours after the intervention, nausea and vomiting were measured in experimental and control groups. The data were analyzed using descriptive statistics (Mean, standard deviation, absolute and relative frequency) and inferential statistical tests (independent t-test, paired t-test, analysis of variance with repeated measures, Chi-square) by SPSS19. Results: In control group the mean of the severity of nausea in all measured stages was more than experimental group. Also, in both experimental and control groups as the time measurement increased, the severity of nausea showed a decreasing trend. The difference in the severity degrees of nausea between the two groups of experimental and control was significant. The severity of nausea in experimental group was less than control group (P<0.001). Significant difference was observed in the frequency of vomiting between two groups after intervention (P<0/001). Conclusion: Upon to results, use of inhalation of lavender aroma to reduce nausea and vomiting after ventral hernia surgery, is recommended.