・Intriduction
Intraoperative indocyanine green (ICG) fluorography can be helpful for various digestive surgeries (1) and has a wide range of uses, such as in the evaluation of blood or bile flow, lesion localization, and boundary between the lesion and normal tissue (2-5). ICG is generally injected into the patient’s body via the intravenous or subcutaneous routes.
Determining the exact dissection layer between the internal and external anal sphincters for laparoscopic intersphincteric resection (ISR) is often difficult (6). Furthermore, matching the approached dissection layer from the transanal surgery with that from the transpelvic surgery is quite challenging. Here, we proposed a procedure that can help alleviate the difficulty in identifying a suitable dissociated layer by impregnating gauze with ICG without injecting it into the patient’s body during laparoscopic ISR.