The AirSeal system (CONMED, NY, USA) can outstandingly keep pneumoperitoneum stable. However, water droplets form on the access port, impairing the performance of comfortable surgical procedures because of the resultant wet surgical field. This study was performed to clarify the mechanism of water droplet formation and to prevent it. Condensation was observed on the AirSeal system. A heater was wrapped around the tri-lumen tube, and the heating effect was assessed. The simulator experiments revealed that condensation formed in the tri-lumen tube and on the wall of the access port. The accumulated weight of the condensation on the wall of the access port was 41.6 g in the Heated group, 138.2 g in the Control group, and 479.4 g in the Cooled group. In the clinical assessment, the accumulated volume of the condensation attached to the inside wall was significantly smaller in the Heated group than in the Unheated group (111.7 g vs. 332.9 g, respectively). We clarified that the volume of condensation attached to the wall of the access port depended on the temperature of the tri-lumen tube. The clinical study revealed that the condensation on the access port was reduced by heating the tri-lumen tube. The development of a novel heating device for the insufflation tube would be effective and useful.

A peripheral nerve compression injury associated with surgical positioning is an important complication that might compromise quality of life. We report a rare case of posterior interosseous nerve (PIN) palsy after robotic rectal cancer surgery. A 79-year-old male with rectal cancer underwent robotic low anterior resection in a modified lithotomy position with both arms tucked at his sides with bed sheets. Following surgery, he felt difficulty moving his right wrist and fingers. A neurological examination revealed muscle weakness in the area innervated by the PIN alone without sensory disturbance, and he was diagnosed with PIN palsy. The symptoms improved with conservative treatment in about a month. The PIN is a branch of the radial nerve and controls dorsiflexion of the fingers, and intraoperative continuous pressure on the upper arm by right lateral rotation position or by the robot arm was considered to be the cause.

Purpose Elderly people are thought to be more likely than their non-elderly counterparts to experience a decline in activities of daily living (ADL) and quality of life (QOL) due to the onset and treatment of disease. In this study, we investigated whether there was an age-related difference in changes in healthrelated QOL indices after surgical resection of colorectal cancer.Methods Patients who underwent elective surgery for primary colorectal cancer at our hospital between September 2017 and November 2021 were enrolled. Changes in QOL after surgery were evaluated after dividing the study population into a non-elderly (NE) group (younger than 75 years) and an elderly (E) group. A self-administered Short-Form 36-Item Health Survey was used as an index of QOL. The subscale and component summary scores before and 6 months after surgery were compared.Results There was no signi cant difference in clinical or demographic characteristics between the NE group (n=166) and the E group (n=47). There was also no signi cant difference in worsening of indices of physical function after surgery in either group. In the NE group, there were signi cant decreases in role physical and role component summary scores and signi cant increases in general health, mental health, and mental component summary scores. In the E group, there were no signi cant changes in the subscale or component summary scores after surgery. Conclusion There was no signi cant difference in QOL after surgery for colorectal cancer between elderly patients and non-elderly patients. Surgical resection for colorectal cancer should be considered even for elderly patients, while considering possible risk factors for worsening ADL and QOL.

Purpose Elderly people are thought to be more likely than their non-elderly counterparts to experience a decline in activities of daily living (ADL) and quality of life (QOL) due to the onset and treatment of disease. In this study, we investigated whether there was an age-related difference in changes in health-related QOL indices after surgical resection of colorectal cancer. Methods Patients who underwent elective surgery for primary colorectal cancer at our hospital between September 2017 and November 2021 were enrolled. Changes in QOL after surgery were evaluated after dividing the study population into a non-elderly (NE) group (younger than 75 years) and an elderly (E) group. A self-administered Short-Form 36-Item Health Survey was used as an index of QOL. The subscale and component summary scores before and 6 months after surgery were compared. Results There was no significant difference in clinical or demographic characteristics between the NE group (n=166) and the E group (n=47). There was also no significant difference in worsening of indices of physical function after surgery in either group. In the NE group, there were significant decreases in role physical and role component summary scores and significant increases in general health, mental health, and mental component summary scores. In the E group, there were no significant changes in the subscale or component summary scores after surgery. Conclusion There was no significant difference in QOL after surgery for colorectal cancer between elderly patients and non-elderly patients. Surgical resection for colorectal cancer should be considered even for elderly patients, while considering possible risk factors for worsening ADL and QOL.