-Original-

Distribution of Splenic Arterial Flow and Segmental Spleen Volume for Partial Splenic Arterial Embolization

Junji Ueda¹, Yasuhiro Mamada¹, Nobuhiko Taniai², Masato Yoshioka¹, Akira Matsushita¹, Satoshi Mizutani², Yoichi Kawano³, Tetsuya Shimizu¹, Tomohiro Kanda⁴, Hideyuki Takata², Hiroyasu Furuki⁴, Yuto Aoki³, Mampei Kawashima¹, Toshiyuki Irie¹, Takashi Ohno¹, Takahiro Haruna¹ and Hiroshi Yoshida¹

¹Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, Tokyo, Japan
²Department of Gastrointestinal Surgery, Nippon Medical School Musashi Kosugi Hospital, Kanagawa, Japan
³Department of Gastrointestinal Surgery, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
⁴Department of Surgery, Nippon Medical School Tama Nagayama Hospital, Tokyo, Japan

Introduction: The spleen is a lymphatic organ that manages immune surveillance of the blood, produces blood cells, and helps filter the blood, remove old blood cells, and fight infection. The normal splenic weight is approximately 65-265 g. This study evaluated spleen volume and segmental volume.
Methods: 121 patients who underwent enhanced CT at our center were analyzed. The spleen was divided into upper, middle, and lower segments according to arterial flow area, and the volume of each segment was measured. Patients were classified into two groups as those with and without liver cirrhosis, and differences in the distribution of the segments in these groups was evaluated.
Results: The mean upper, middle, and lower spleen segmental volume ratios were 35.4%, 37.0%, and 27.6%, respectively. In the liver cirrhosis group, the segmental splenic volume ratios for the upper, middle, and lower segments were 34.5%, 38.5%, and 28.0%, respectively, indicating that these ratios remain similar regardless of liver cirrhosis status.
Conclusion: The present findings on segmental spleen volume are useful for estimating infarction volume in cases of partial splenic arterial embolization.

J Nippon Med Sch 2024; 91: 83-87

Keywords
spleen, segmental volume, LC

Correspondence to
Junji Ueda, MD, PhD, Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-5-1 Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan
junji0821@nms.ac.jp

Received, March 4, 2023
Accepted, July 12, 2023