財川 英紀¹, 市川 陽子¹, 篠﨑 和実¹, 沼尾 敦子¹, 小滝 陽子¹, 和貝 和子¹, 植林 久美子², 川井 夫規子², 亀田 徹³

Hideki TARAKAWA¹, Youko ICHIKAWA¹, Kazumi SHINOZAKI¹, Atsuko NUMAO¹, Youko KOTAKI¹, Kazuko WAGAI¹, Kumiko UEBAYASHI², Fukiko KAWAI², Toru KAMEDA³

¹栃木県済生会宇都宮病院医療技術部臨床検査技術科超音波検査課, ²栃木県済生会宇都宮病院超音波診断科, ³安曇野赤十字病院救急科

¹Department of Clinical Laboratory, Saiseikai Utsunomiya Hospital, ²Department of Clinical Laboratory Medicine, Saiseikai Utsunomiya Hospital, ³Depertment of Emergency Medicine, Red Cross Society Azumino Hospital

キーワード : smartphone-type ultrasound device, bladder capacity

目的：スマートフォン型超音波装置が膀胱容量の計測に有用かを検討した．対象と方法：泌尿器領域の超音波検査依頼のうち，同意の得られた44症例を対象とした．1名の超音波検査士がスマートフォン型超音波装置にて膀胱の横径，上下径，前後径を計測した．次にその結果を受けずに他の超音波検査士が高性能超音波装置で同様に計測した．膀胱容量は（横径×上下径×前後径）×0.52の式にて算出した．結果と考察：スマートフォン型超音波装置と高性能超音波装置で計測した膀胱容量は相関係数R＝0.851で高い相関が得られた．しかし狭い視野角のため，膀胱全体が描出不能例では高性能超音波装置との間で計測値に乖離が見られた．結論：スマートフォン型超音波装置は膀胱容量計測において高性能超音波装置に準じた精度がある．在宅医療等での排尿ケア等，院外での医療現場で活用が期待される．

Purpose: We aimed to investigate whether a smartphone-type ultrasound device could be used to satisfactorily evaluate bladder capacity. Subjects and Methods: Forty-four cases in which urological ultrasonography examination was requested were included in the study and patient consent was obtained. A smartphone-type ultrasound device was used by a sonographer to measure the transverse, vertical, and anteroposterior diameters of the bladder. Next, the same dimensions were measured using a high-performance ultrasound device that was operated by another sonographer who was blinded to the results obtained using the smartphone-type ultrasound device. The bladder capacity was calculated using the following formula: (transverse diameter × vertical diameter × anteroposterior diameter) × 0.52. Results and Discussion: The correlation coefficient of the bladder capacity measured by the smartphone-type ultrasound device and high-performance ultrasound device was high (R=0.851). However, in cases in which the entire bladder could not be visualized owing to the small viewing angle, differences in measurement values between the high-performance ultrasound device and smartphone-type ultrasound device were observed. Conclusion: The smartphone-type ultrasound device has an accuracy equivalent to that of a high-performance ultrasound device in bladder capacity measurement. This can be utilized in medical practice outside hospitals, such as in home medical care for urination care.