IRCT2016031216765N3 IRCT 2016-05-13 Vice chancellor for research, Tehran University of Medical Science َAssessment the effect of transcutaneus electrical nerve stimulation method on shoulder pain in laparoscopic surgeries of women transcutaneus electrical nerve stimulation Assessment the effect of TENS method on shoulder pain in women during gynecologic laparoscopic surgeries with spinal anesthesia in comparison with Fentanyl administration method 2016-05-19 anticipated 80 Complete https://irct.ir/trial/15583 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Other design features: Randomization is performed by blocking. 2 shoulder pain. Intervention 1: Intervention group: Before spinal anesthesia 4 pads of the device with size of 4* 10 and at the distance of 5 cm is adhered in the zone of scapula and behind both shoulders and is regulated with frequency of 16 HZ and amplitude of 150 microseconds. After spinal anesthesia and administration of 100 mg Diclofenac suppository, surgery starts and as soon as complaining of shoulder pain by patient, TENS device is turned on for 20 minutes. Intervention 2: Control group: After spinal anesthesia and administration of 100 mg Diclofenac suppository before surgery, as soon as patients states pain, Fentanyl with dose of 50 mg is injected IV.