Evaluation of the usefulness of Vacuum-lock device for patient immobilization during lower extremity percutaneous transluminal angioplasty

During Percutaneous trans-luminal angioplasty, the patient's uncooperative movements cause delays in the procedure time, and unnecessary radiation exposure. Therefore, in this study, we attempted to investigate the usefulness of the vaccum-lock device, which is usually used in radiation therapy, by applying it to interventional radiology patients. Three experimental groups were set up for this study. First, an Optical stimulated luminescense dosimeter was used on pig feet to determine the radiation exposure dose that changes when the vaccum-lock device is applied. Second, for patients who received the procedure on both legs, the vaccum-lock device was applied only to one side and NOT to the other side. Afterwards, the captured images were compared. Third, in the case of a patient who received the procedure on only one leg, the vaccum-lock device was applied before percutaneous transluminal angioplasty, and the device was removed after ballooning was completed. We compared the images before and after applyung the device.When vacuum-lock deivce was applied, the average core dose increased by 0.24 mSv compared to the case without it, and the surface dose increased by 0.29 mSv.

As a result of examining the difference in radiation exposure due to the application of vacuum-lock device, it was found that there was no significant difference in the deep dose and shallow dose that the patient received due to the application of the vacuum-lock device. A study was conducted on 20 patients to prove the hypothesis that the patient's movements would be inhibited by applying the Vacuum-Lock Device. As a result, 14 of the 20 patients studied showed differences before and after applying the Vacuum-Lock Device. It was found that there was a significant effect on movement inhibition.