Srijumruen Janyarut, Vachatimanont Sira, Techavijit Usanee, Chaiwatanarat Tawatchai
Buddhachinaraj Phitsanulok Hospital, Phitsanulok, Thailand.
Nuclear Medicine Division, Department of Radiology, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thailand.
Asia Ocean J Nucl Med Biol. 2022 Spring;10(2):84-90. doi: 10.22038/AOJNMB.2021.60453.1423.
The normal range of the frequency of antral contractions, similar to other gastric motility parameters, are different depending on the population and the test meal. We, therefore, conducted the analysis to establish the normal ranges for the frequency of antral contractions derived from dynamic antral scintigraphy (DAS) following an Asian-styled solid meal in Thai healthy volunteers.
We retrospectively analyzed the data from the study on normal gastric emptying values. The dynamic scintigraphic images had been obtained in a 45 degree left anterior oblique view during the first 32 minutes following the ingestion of a 267-kcal steamed rice, a technetium-99m-labeled microwaved egg and 100 mL of water. A polynomial normalization model was used to analyze and to calculate the frequency of antral contractions. The data analysis was repeated by the same operator 1 month apart to assess reproducibility.
Data of 18 volunteers (10 males and 8 females) were eligible for analysis. The mean±SD of the frequencies of the antral contractions were 3.06±1.08 cycles/min on the first and 3.04±1.10 cycles/min on the second analysis. Comparison of the two analyses revealed a moderate agreement (ICC=0.632, 95% CI 0.329-0.818) without significant difference (p-value=0.942). No significant effect of gender, menstruation status, smoking or age was demonstrated in this study.
DAS is a non-invasive technique that can measure the frequency of antral contractions. The technique is reproducible and consistent. Future study may be required to assess the effect of gender, menstruation status, smoking and age.
与其他胃动力参数一样，胃窦收缩频率的正常范围因人群和试餐不同而有所差异。因此，我们进行了此项分析，以确定泰国健康志愿者在食用亚洲风味固体餐后，通过动态胃窦闪烁扫描（DAS）得出的胃窦收缩频率的正常范围。
我们回顾性分析了关于正常胃排空值研究的数据。在摄入含267千卡的蒸米饭、经99m锝标记的微波鸡蛋和100毫升水后的前32分钟内，从45度左前斜位获取动态闪烁扫描图像。采用多项式归一化模型分析并计算胃窦收缩频率。由同一名操作人员在相隔1个月的时间重复进行数据分析，以评估可重复性。
18名志愿者（10名男性和8名女性）的数据符合分析要求。胃窦收缩频率的均值±标准差在第一次分析时为3.06±1.08次/分钟，第二次分析时为3.04±1.10次/分钟。两次分析结果比较显示具有中等一致性（ICC = 0.632，95%CI 0.329 - 0.818），无显著差异（p值 = 0.942）。本研究未显示性别、月经状态、吸烟或年龄有显著影响。
DAS是一种可测量胃窦收缩频率的非侵入性技术。该技术具有可重复性且结果一致。未来可能需要开展研究以评估性别、月经状态、吸烟和年龄的影响。
