Objective:To investigate the application value of stereotactic digital naviga-tion system assisted three-dimensional (3D) laparoscopic total mesorectal excision (TME) for rectal cancer.Methods:The retrospective and descriptive study was conducted. The clinicopathological data of a healthy volunteer recruited by the Second Affiliated Hospital of Army Medical University and 3 patients who underwent stereotactic digital navigation system assisted 3D laparoscopic TME for rectal cancer in the Second Affiliated Hospital of Army Medical University from May to September 2019 were collected. The healthy volunteer was male, aged 25 years. Of the 3 rectal cancer patients, there were 2 males and 1 female, with the age of 48 years, 63 years and 67 years, respectively. Ten special patches were placed at the anterior superior iliac spine, pubic tubercle and pubic symphysis of the volunteer's bilateral inguen as skin reference points in intraoperative localization and system registration. On the day of operation, patients were placed 10 special patches as skin reference points according to the test results of the volunteer and were completed the enhanced scan of totally abdominal computed tomography examination. Seven fixed anatomical markers in the abdominal cavity of the patients, including abdominal aortic bifurcation, sacrum scapula, bilateral anterior superior iliac spine, bilateral intersection of ureter and iliac artery and median point of peritoneal reflection, were selected for verifying the accuracy of the correspondence between the instrument tip and the system image. Patients underwent 3D laparoscopic TME for rectal cancer assisted by stereotactic digital navigation system. Observation indicators: (1) test results; (2) surgical situations; (3) accuracy of stereotactic digital navigation system. Measurement data with normal distribution were represented as Mean± SD. Results:(1) Test results. The 10 skin reference points of the volunteer were successfully registered in the stereotactic digital navigation system, with the registration error of 2.8 mm. (2) Surgical situations. All the 3 patients underwent stereo-tactic digital navigation system assisted 3D laparoscopic TME for rectal cancer successfully. The operation time of the 3 patients were 193 minutes, 175 minutes, 210 minutes, respectively, in which the set time of the stereotactic digital navigation system were 34 minutes, 25 minutes, 45 minutes, respectively. The volume of intraoperative blood loss of the 3 patients were 60 mL, 30 mL, 80 mL, respectively. Results of postoperative pathological examination showed 3 patients with adenocar-cinoma, including 1 case with mucinous adenocarcinoma. The tumor diameter and the numbers of lymph nodes dissected of the 3 patients were 2.3 cm, 1.5 cm, 4.0 cm and 12, 12, 13, respectively. No patient had lymph node metastasis. The 3 patients in preoperative clinical TNM stage cT3bN0M0, stage cT4aN1M0, stage cT3bN1M0 were in yield pathological TNM stage ypT1N0M0, stage ypT4aN0M0, stage ypT2N0M0 after neoaduvant chemotherapy, respectively. No patient had complication, and the duration of postoperative hospital of the 3 patients was 7 days, 6 days, 7 days, respectively. (3) Accuracy of stereotactic digital navigation system. The registration errors of the skin reference points were 2.8 mm, 2.6 mm, 2.9 mm and the accuracy errors of the abdominal cavity reference points were (2.5±0.4)mm, (2.3±0.7)mm, (2.6±0.6)mm for the 3 patients.Conclusion:The stereotactic digital navigation system assisted 3D laparoscopic TME for rectal cancer is safe and feasible.

OBJECTIVETo explore the feasibility, safety, and preliminary technical experience of single incision plus one port laparoscopic total gastrectomy combined with π-shaped esophagojejunal anastomosis (SILT-π) in the surgical treatment of gastric cancer.

METHODSClinical data of 5 gastric cancer patients undergoing SILT-π operation at the Department of General Surgery, The Second Affiliated Hospital of the Army Medical University from August to October 2017 were retrospectively analyzed. A 2.5-3.0 cm incision around the umbilicus was made for placing the gloveport as the passage for the lens, and the instruments of the surgeon and the assistant. Another operative port was placed in the left upper quadrant with a 12-mm Trocar for the passage of the energy device, the endoscopic cutting closure, as well as the postoperative drainage tube. A D2 lymph node (LNs) dissection was regularly conducted. After the abdominal esophagus was routinely mobilized, a side-to-side esophagus-jejunum anastomosis was made through a gastric pre-pulling esophagojejunal π-shaped anastomosis. The transection was then performed with a ligation on the cardia (or esophagus above the upper margin of the tumor) using a sterilized hemp rope in order to better expose the abdominal esophagus. Throughout the course of reconstruction, the ligature rope was held by the assistant to hold down the esophagus to allow easier esophagojejunal anastomosis. A hole was then made on the posterior wall of the esophagus, between 2 cm and 3 cm above the ligature rope, and another hole was made at the anti-mesenteric border of the jejunum 40 cm distal to the Treitz ligament. A side-to-side esophagojejunal π-shaped anastomosis was performed through two holes. An entry hole was formed after the anastomosis. After checking the anastomosis, this entry hole was closed through an intestinal mesenteric hole pre-made on its opposite side. The resected esophagus and stomach, together with the afferent loop jejunum, were simultaneously transected above the level of the entry hole by a stapler from the Trocar of the left upper abdominal quadrant. After the gloveport was closed, a side-to-side jejunojejunostomy anastomosis applied with another two staples was performed between the afferent loop stump and the roux limb 30 cm below the esophagojejunal anastomosis.

RESULTSThese five patients were all male, and aged (56.8±8.2) years with preoperative clinical stage cT2-4N0-2M0. All the 5 patients underwent SILT-π operation successfully. The average length of surgical incision was (2.9±0.2) cm. The average operation time was (396.0±36.1) minutes. The intraoperative blood loss was (140.0±66.7) ml. Postoperative pathology showed proximal and distal margins were (2.6±1.1) cm and (8.7±2.5) cm apart respectively, and the average number of retrieved lymph node was 25.8±7.2. Perioperative management was based on enhanced recovery following surgical (ERAS) principles. The average time to the first flatus was (2.6±0.5) days, and the average time to defecation was (3.6±0.5) days. The pain score on postoperative day 1 was 1-2, and the average postoperative hospital stay was (7.0±0.7) days. No perioperative complications occurred.

CONCLUSIONSSILT-π procedure is safe and feasible for patients with gastric cancer, and has positive short-term outcomes, satisfactory cosmetic abdominal incision, light postoperative abdominal pain and rapid postoperative recovery. Preliminary observations show that SILT-π procedure has good potential for clinical application in future.

Aged ; Anastomosis, Surgical ; Esophagus ; surgery ; Gastrectomy ; methods ; Humans ; Jejunum ; surgery ; Laparoscopy ; Male ; Middle Aged ; Retrospective Studies ; Stomach Neoplasms ; surgery

This study aimed to introduce a minimally invasive technique for maxillary sinus floor elevation using the lateral approach (lSFE) and to determine the factors that influence the stability of the grafted area in the sinus cavity. Thirty patients (30 implants) treated with lSFE using minimally invasive techniques from 2015 to 2019 were included in the study. Five aspects of the implant (central, mesial, distal, buccal, and palatal bone heights [BHs]) were measured using cone-beam computed tomography (CBCT) before implant surgery, immediately after surgery (T0), 6 months after surgery (T1), and at the last follow-up visit (T2). Patients' characteristics were collected. A small bone window (height, (4.40 ± 0.74) mm; length, (6.26 ± 1.03) mm) was prepared. No implant failed during the follow-up period (3.67 ± 1.75) years. Three of the 30 implants exhibited perforations. Changes in BH of the five aspects of implants showed strong correlations with each other and BH decreased dramatically before second-stage surgery. Residual bone height (RBH) did not significantly influence BH changes, whereas smoking status and type of bone graft materials were the potentially influential factors. During the approximate three-year observation period, lSFE with a minimally invasive technique demonstrated high implant survival rate and limited bone reduction in grafted area. In conclusion, lSFE using minimally invasive techniques was a viable treatment option. Patients who were nonsmokers and whose sinus cavity was filled with deproteinized bovine bone mineral (DBBM) had significantly limited bone resorption in grafted area.
Humans ; Animals ; Cattle ; Maxillary Sinus/surgery* ; Retrospective Studies ; Sinus Floor Augmentation ; Bone Resorption ; Cone-Beam Computed Tomography