افسانه فولادی

Labor duration is of the factors affecting pregnancy outcomes and damages inflicted on mother and fetus. This study was performed with aim to compare the effects of transcutaneous electrical nerve stimulation (TENS) and pharmaceutical hyoscine - promethazine compound on duration of second phase of labor.

This two-group clinical trial was performed on 84 eligible pregnant women referred to Shahid Chamran Hospital of Kangavar division in 2017. The subjects were placed in two groups of TENS and hyoscine - promethazine (n=42 in each group). In medication group, 20 mg of hyoscine and 25 mg of promethazine were conjointly intramuscularly given at the onset of active phase. In TENS group, TENS device was used with 1 pair of upper electrodes being placed between L1-T10 and 1 pair of lower ones being placed between S2-S4 on both sides of spinal column. Duration of the second phase of labor was assessed in both groups. Data was analyzed by SPSS software (version 17), and Chi-square test, and independent t-test, and paired sample t test. P

Mean of contraction duration during the first phase of labor showed no significant difference between two groups (P=0.86). Also, two groups had no significant difference in terms of mean of contraction frequency (P=0.23). Duration of second phase of labor was 26.1  1.96 min in TENS group and 30.7  1.54 min in hyoscine-promethazine group, that no significant difference was observed between two groups (P=0.232).

The effect of TENS and Hyoscine-Promethazine combination on duration of second stage of labor was similar.

Delivery is an experience with full of stress, with pain, fatigue and fear. The fear of labor pain causes their tendency to cesarean section. It is believed that labor pain is the most painful pain experienced by human beings. This pain occurs at different stages of delivery. Labor duration is a factor affecting pregnancy outcomes and contributing to damages inflicted on mothers and their fetus. Present study was performed with aim of comparing effects of transcutaneous electrical nerve stimulation (TENS) with those of pharmaceutical hyoscine – promethazine compound on duration of the first phase of labor in 2015.

This research was done by clinical ergometric method on 84 eligible pregnant women (42 in TENS group; 42 in hyoscine – promethazine group) referring to the Martyr Chamran Hospital of Kangavar division. At the onset of active phase, medication group were injected once with 20 mg of hyoscine and 25 mg of promethazine intramuscularly simultaneously. For non – medication group, TENS device was employed, with a pair of upper electrodes being placed between L1-T10 and a pair of lower ones being placed between S2-S4 on both sides of spinal column. Two groups were tested for duration of the first phase of labor.

Variables of age, body mass index(BMI), pregnancy age, dilatation of the second phase of labor and infant weight were tasted in both groups showing no significant differences in this regard (p>0.05). In the first phase of labor, no statistically significant difference was observed between 2 groups in terms of the means of contraction number means (p=0.23). But during of the first phase of labor exhibited some significant difference between 2 groups (p=0.002); in TENS group, mean duration of the first phase was shorter than hyoscine-promethazine group.

compared to pharmaceutical hyoscine-promethazine compound, TENS further shortened duration of the first phase of labor; therefore, it is recommended that TENS be used to shorten labor duration.

Several physical and psychological factors affect the severity and duration of labor pain. Factors such as maternal age, parity, cervical position at the onset of labor, and the relationship between the size and position of the embryo with the size of the canal of delivery are important factors in the severity of labor pain. Effective psychosocial factors that may affect physical factors include fear, anxiety, cultural beliefs and companionship in the delivery room. The severity of pain varies from one person to another, and according to published reports, 15% have mild pain, 35% have moderate pain, 30% have severe pain, and 20% have reported uncommitted pain. Considering the painful nature of labor, the present study was conducted to compare the effect of TENS with hyoscine-promethazine on reducing the frequency of labor pain in the active phase of labor.
By a clinical ergometric method, this research was done on 84 eligible pregnant women (42 in TENS group; 42 in hyoscine- promethazine group) referring to Shahid Chamran Hospital of Kangavar city. When active phase of labor began, 20 mg of hyoscine and 25 mg of promethazine were simultaneously administered to the medication group intramuscularly. For TENS group, TENS device was used, with a pair of upper electrodes being between L1-T10 and a pair of lower ones between S2-S4 on both sides of spinal column. Pain scores were studied under per- and post- intervention conditions for 2 groups. Collected data was analyzed by using SPSS software, chi- square test and independent t-test at p Two groups were tested for variables of age, body mass index (BMI), pregnancy age, dilatation at the time of admission, exhibiting no significant differences (p>0.05). The means of contraction duration (p>0.05) and of contraction number (p>0.05) did not differ significantly for 2 groups. But results from comparison of the mean pain scares of 2 groups of studied pregnant women showed that it was significantly lower for TENS group throughout active labor phase at different dilatations than for the other group (hyoscine- promethazine) (p TENS relieves labor pain; therefore, it is recommended to use it for this purpose.