Effect analysis of three-dimensional and two-dimensional imaging systems in laparoscopic radical resection of rectal cancer

Abstract

Objective To compare the clinical effect of three-dimensional (3D) and two-dimensional (2D) imaging systems in laparoscopic radical resection of rectal cancer. Methods The retrospective cohort study was adopted. The clinical data of the 97 patients who underwent laparoscopic radical resection of rectal cancer at the Xinmin Branch of the China-Japan Union Hospital of Jilin University between May 2012 and December 2014 were collected. Of 97 patients, 47 undergoing 3D laparoscopic radical resection of rectal cancer were allocated into the 3D group and 50 undergoing 2D laparoscopic radical resection of rectal cancer were allocated into the 2D group. The operation followed strictly tumor-free and total mesorectal excision principles. Observation indicators included: (1) surgical situations: operation time, time of deep lymph nodes dissected, volume of intraoperative blood loss, bleeding volume of obturator lymph nodes dissected, number of lymph nodes dissected, postoperative complications and duration of hospital stay. (2) Follow-up situations: follow-up using outpatient examination and telephone interview was performed to detect the survival of patients and tumor recurrence and metastasis up to December 2015. Measurement data with normal distribution were presented as ±s and comparison between groups was analyzed using the t test. Count data were analyzed using the chi-square test. Results (1) Surgical situations: all the patients underwent successful laparoscopic radical resection of rectal cancer, without conversion to open surgery. Operation time, time of deep lymph nodes dissected, volume of intraoperative blood loss, bleeding volume of obturator lymph nodes dissected, number of lymph nodes dissected and duration of postoperative hospital stay were (134.6±18.5)minutes, (21.2±2.7)minutes, (65±20)mL, (16±3)mL, 23.6±3.5, (8.2±2.3)days in the 3D group and (157.4±17.8)minutes, (25.2±2.5)minutes, (89±27)mL, (23±5)mL, 20.5±2.8, (9.4±2.1)days in the 2D group, respectively, with statistically significant differences between the 2 groups (t=2.999, 3.739, 2.327, 4.221, 2.337, 1.274, P 0.05). (2) Follow-up situations: 75 of 97 patients were followed up for 12-36 months with a median time of 24 months, including 35 in the 3D group and 40 in the 2D group, and they were tumor-free survival. Conclusion Compared with 2D laparoscopic radical resection of rectal cancer, 3D laparoscopic radical resection of rectal cancer can shorten the operation time and reduce tissue damage and intraoperative blood loss, and it is beneficial to deep lymph node dissection. Key words: Rectal neoplasms; Radical resection; Laparoscopy; Three-dimension