Abstract

Robotic-assisted thoracic surgery (RATS) is a minimally invasive procedure; however, some patients experience persistent postoperative pain. This study aimed to investigate factors related to postoperative pain following RATS. The data of 145 patients with lung cancer, who underwent RATS with a four-port (one in the sixth intercostal space [ICS] and three in the eighth ICS) lobectomy or segmentectomy between May 2019 and December 2022, were retrospectively analyzed. Factors associated with analgesic use for at least 2 months following postoperative pain (PTP group) were analyzed. Patients who underwent preoperative pain control for any condition or chest wall resection were excluded. Among the 138 patients, 45 (32.6%) received analgesics for at least 2 months after surgery. Patient height and transverse length of the thorax correlated with PTP in the univariate analysis (non-PTP vs. PTP; height, 166 vs. 160 cm; p < .001; transverse length of the thorax, 270 vs. 260 mm, p = .016). In the multivariate analysis, height was correlated with PTP (p = .009; odds ratio, 0.907; 95% confidence interval, 0.843-0.976). Height correlated with the transverse length of the thorax (r = .407), anteroposterior length of the thorax (r = .294), and width of the eighth ICS in the middle axillary line (r = .210) using Pearson's correlation coefficients. When utilizing a 165-cm cutoff value for height to predict PTP using receiver operating characteristic curve analysis, the area under the curve was 0.69 (95% confidence interval, 0.601-0.779). Short stature is associated with a high risk of postoperative pain following RATS.

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