关键词: 骨显像, 周围剂量当量率, 锝亚甲基二膦酸盐, 饮水, 肿瘤护理

Abstract:

Objective To investigate the effects of the starting time of drinking water on peripheral dose equivalent rate in patients undergoing bone scan,in order to further reduce the impact of bone imaging on the public. Methods Sixty hospitalized patients with bone imaging were randomly divided into an experimental group and a control group. The experimental group began to drink water for 1 000 ml at 1 h before injection,and the control group drank water for 1 000 ml at 2 h after injection,both within 1 h to finish. The dose equivalent rates at 0.5 h,1 h,2 h,3 h,6 h,12 h,and 24 h after injection were measured by a radiation dosimeter at 0.5 m,1 m,2 m,and 3 m in front of the subjects. The distance and time were compared between the two groups when the peripheral dose equivalent rate was reduced to 2.5μSv/h. Results There were statistically significant differences in the peripheral dose equivalent rates between the two groups at 5 time points（0.5 h,1 h,2 h,3 h,and 6 h） and different distances（0.5 m,1 m,2 m,and 3 m） after injection（P<0.05）. Also,the peripheral dose equivalent rate in the experimental group was lower than that in the control group. The distance and time of the experimental group were less compared to those in the control group when the peripheral dose equivalent rate was reduced to 2.5μSv/h. The image quality of both groups was satisfactory and met the diagnostic criteria. Conclusion The bone imaging subjects can drink 1 000 ml of water at 1 hour before the injection,in order to accelerate the excretion of the imaging agent while ensuring image quality,and reduce the surrounding dose equivalent rate in 6 hours after the injection. Nurses can use the results of measurement to guide radiation protection for patients,family members and the public.

Key words: Bone Scan, Peripheral Dose Equivalent Rate, ^99mTc-MDP, Drinking Water, Neoplasms Nursing