論文種別	その他
言語種別	英語
査読の有無	その他(不明)
表題	A Novel Laparoscopic Injection Needle for Abdominal Wall Nerve Block in Reduced Port Surgery.
掲載誌名	正式名：Asian journal of endoscopic surgery 略　 称：Asian J Endosc Surg ISSNコード：17585910/17585902
掲載区分	国外
巻・号・頁	19(1),pp.e70287
著者・共著者	Jun Nagata, Jun Watanabe, Asahi Nagata, Hiroto Sannomiya, Kensuke Nitta, Atsuhiro Koga, Yasuki Akiyama, Masumi Yamauchi, Yasuhisa Mori, Nagahiro Sato, Toshihisa Tamura, Kazunori Shibao, Keiji Hirata
発行年月	2026
概要	Abdominal wall nerve blocks support multimodal analgesia, but percutaneous ultrasound-guided blocks can be technically difficult in reduced port surgery (RPS) and may carry a risk of inadvertent visceral injury when puncture angles are constrained. Our group previously demonstrated that a transperitoneal abdominal wall block can be performed with simultaneous extracorporeal ultrasound confirmation of injectate spread. Here, we report a purpose-designed laparoscopic injection needle to standardize this internal approach in RPS. The single-use device has an 800 mm flexible shaft, a 25-gauge needle, and an adjustable tip protrusion (2-7 mm), enabling insertion through 3 or 5 mm ports while maintaining pneumoperitoneum. The target layer is identified from the peritoneal side; correct plane entry is confirmed by visual "tenting" and controlled hydrodissection; and local anesthetic is delivered while observing real-time tissue distension. The technique was integrated into reduced-port transabdominal preperitoneal (TAPP) inguinal hernia repair without workflow interruption. CONCLUSIONS: This device provides a practical method to perform abdominal wall nerve block under direct visualization in RPS, with depth control tailored to abdominal wall thickness. Future comparative studies versus ultrasound-guided techniques are warranted.
DOI	10.1111/ases.70287
PMID	41958229