41 preterm infants whose parents agreed with their participation in the present study, were selected. The infants were randomly assigned into two experimental and control groups. In the experimental group, demographic, basic and physiological information questionnaire was completed with NIPS & EDIN Scale before implementing any intervention. Then, environmental and behavioral interventions such as closing the infants’ eyes to reduce the light using eye pad, closing the infants’ ears to reduce auditory simulations using ear plugs and placing the baby in an embryonic state to reduce environmental simulations using the nests prepared by the researcher, were implemented by researcher. 30 minutes after intervention, while the intervention was going on, intravenous catheter placement was performed by a qualified nurse. At the same time, a graduate student who knew how to fill the measuring tools and had at least one year working experience in the neonatal ward, filled the related checklist at the times of 2 minutes before, during and 5 minutes after intravenous catheter placement. Then, 30 minutes after intravenous catheter placement, while the intervention was going on, the physiologic information form and related checklists were filled again and the infant was removed from the study after an hour.
No environmental and behavioral interventions were implemented on the infants in the control group, but, like the first time, all the stages of collecting information and filling the checklists were performed and recorded.