In control application, subcutaneous (SC) LMWH injection will be applied in patient's left abdomen with standard method on Post-op 0th day by the researcher. Intervention with ShotBlocker will be performed on the right abdomen site on post-op 1st day by the researcher. During subcutaneous LMWH injection with ShotBlocker, suitable injection site in right abdomen will be grasped by applying medium-weight pressure as ShotBlocker's obtuse touching points would touch the skin. In order to avoid ecchymosis and hematoma, it will be applied slowly for 10 seconds by entering from the middle point of ShotBlocker with a 90° angle. When injection is over, ShotBlocker will be removed 10 seconds will be waited. Removing the needle, the entry point will be applied light pressure with dry cotton for 10 seconds without any massage. Patients' level of pain and satisfaction will be assessed by a nurse working in the clinic with visual analog scale (VAS) within 1 minute after injection.

Standard LMWH application will be performed on the left side for control on Post-op 0th day by the researcher.

Intervention with VRG will be performed on the right abdomen site on post-op 1st day. The researcher will show the patient a video 5 minutes before the injection providing them with virtual reality glasses, which will continue till the end of the operation, after which the glasses will be removed. Patients' level of pain and satisfaction will be assessed by a nurse working in the clinic with visual analog scale (VAS) within 1 minute after injection.

Standard heparin application will be performed on left side for control on post-op 0th day by the researcher. Intervention with cold application will be performed on the right abdomen site on post-op 1st day. Prior to the intervention, cold silica gel pack which stayed in the freezer for at least 2 hours will be placed on patient's injection site by wrapping up with towel and will be applied on the site for 5 minutes. After 5 minutes, the cold gel pack will be removed from the site and subcutaneous LMWH injection will be applied by the researcher. Following the removal of the injector, cold application will continue for another 2 minutes. Patients' level of pain and satisfaction will be assessed by a nurse working in the clinic with visual analog scale (VAS) after injection.

In each group, patients will be applied both standard subcutaneous heparin injection and with ShotBlocker.

In this research, in order to assess patients' level of injection pain, Visual Analog Scale (VAS) will be used. It is a 10 cm scale, on each side of which there is "no pain" and "worst pain". In using VAS, the patient is informed that they are free to choose a spot between two endpoints and the destination from the start of "no pain" and the spot the patient chooses is measured and recorded as cm./ mm. In this assessment, mean pain scores ranging among 1-10 are given. Thus, while "0" refers to no pain, 1-4 VAS values refer to dull pain; 5-6 to moderate pain; 7-10 refer to worst pain. Results will be compared both within group and among all groups at the end of the research.

VAS is also used to measure components other than pain. VAS-Patient Satisfaction is a 10 cm scale, on each side of which there is "Dissatisfied" and "Very Satisfied". After injection, the patient is expect to detect their level of satisfaction by synthesizing affecting factors related to the process and mark the level of satisfaction on a line with a cross (X). High scores obtained from the scale refer to high levels of patient satisfaction. Results will be compared both within group and among all groups at the end of the research.