Rillorta Mary Angeline P, Espiritu Allan Jay
Center for Diagnostic and Therapeutic Nuclear Medicine, Baguio General Hospital and Medical Center, Baguio City, Philippines; and
School of Advanced Studies, Saint Louis University, Baguio City, Philippines.
J Nucl Med Technol. 2023 Sep;51(3):235-238. doi: 10.2967/jnmt.122.265150. Epub 2023 Apr 25.
Immediate and complete decontamination procedures are essential to restore the functionality, precision, accuracy, and safety of tests done within the nuclear medicine facility. Decontamination is a simple procedure that, if performed correctly, effectively reduces exposure brought about by spills. The determination of a suitable radiodecontaminant may be beneficial in decontaminating patient beds, collimators, probes, and machines. Two surface types (i.e., stainless steel and vinyl) were contaminated with a predetermined activity of TcO and I. After air drying, static images of the contaminated surfaces were obtained using a γ-camera to determine the activity counts on each surface before and after decontamination procedures. Different decontaminant contact times (i.e., 5, 10, and 15 min) were used for each decontaminant (i.e., ionized water, 10% bleach, detergent solution, a negative control [no treatment], and a positive control [a commercial radiodecontaminant]). Differences between the effectiveness of ionized water and the other decontaminants against TcO and I at different contact times were measured, and the mean percentage activity removed (%AR) was compared using 2-way ANOVA at the 0.05 level of significance. TcO and I contaminants had %ARs of greater than 80% after 5 min of contact time for ionized water and the other decontaminants. At 15 min contact time, ionized water was not as effective as the other decontaminating agents for I on vinyl surfaces. There was no significant interaction between the effects of the decontaminants (%AR) and the contact times with stainless steel and vinyl for either TcO or I. For TcO and I on stainless steel surfaces, ionized water is an effective decontaminant at contact times of 5, 10, and 15 min. For TcO on vinyl surfaces, ionized water is also an effective decontaminant at contact times of 5, 10, and 15 min. For I on vinyl surfaces, ionized water is as effective as 10% bleach, detergent solution, and a commercial radiodecontaminant at contact times of 5 and 10 min.
立即且彻底的去污程序对于恢复核医学设施内所进行检测的功能、精度、准确性及安全性至关重要。去污是一个简单的程序，如果操作正确，可有效减少溢出造成的暴露。确定合适的放射性去污剂可能有助于对患者床位、准直器、探头及机器进行去污。两种表面类型（即不锈钢和乙烯基）被用预定活度的锝酸盐和碘进行污染。空气干燥后，使用γ相机获取污染表面的静态图像，以确定去污程序前后每个表面的活度计数。每种去污剂（即离子水、10%漂白剂、洗涤剂溶液、阴性对照[无处理]和阳性对照[一种商用放射性去污剂]）使用不同的去污剂接触时间（即5、10和15分钟）。测量了离子水与其他去污剂在不同接触时间对锝酸盐和碘的去污效果差异，并使用双向方差分析在0.05显著性水平比较平均去除活度百分比（%AR）。对于离子水和其他去污剂，接触5分钟后，锝酸盐和碘污染物的%AR大于80%。在15分钟接触时间时，离子水对乙烯基表面上的碘不如其他去污剂有效。对于锝酸盐或碘，去污剂的效果（%AR）与在不锈钢和乙烯基上的接触时间之间没有显著相互作用。对于不锈钢表面上的锝酸盐和碘，离子水在5、10和15分钟的接触时间是一种有效的去污剂。对于乙烯基表面上的锝酸盐，离子水在5、10和15分钟的接触时间也是一种有效的去污剂。对于乙烯基表面上的碘，离子水在5和10分钟的接触时间与10%漂白剂、洗涤剂溶液和一种商用放射性去污剂效果相同。
