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. 2021 Aug 30;8:727059. doi: 10.3389/fsurg.2021.727059

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Copyright © 2021 Pata, Gallo, Pellino, Vigorita, Podda, Di Saverio, D'Ambrosio and Sammarco.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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THD Doppler procedure. (A) Surgical instruments specifically designed for the THD procedure. (B) Schema of the anatomical course of a hemorrhoidal artery and mucopexy fixation point and continuous suture. (C) Suture of a hemorrhoidal artery during DDD (Distal Doppler-guided dearterialization). (D) Mucopexy suture is secured without including the hemorrhoids. (Reproduced from Ratto C. THD Doppler procedure for hemorrhoids: the surgical technique. Tech Coloproctol. (2014) 18:291–298. Creative Commons Attribution 2.0 International License).