Central South University in collaboration with Tianjin University developed the first domestically produced Chinese minimally invasive surgical (MIS) robot system which named "Micro Hand S" in 2013. This new MIS robot had been authorized to enter the clinical trial stage by the Ethics Committee of the Third Xiangya Hospital at Central South University. The Micro Hand S robot is safe and feasible in the preliminary study. However, the learning curve in low anterior resection for rectal resection with the Micro Hand S robot are unclear and whether the two surgical robots (Micro Hand S and da Vinci) shared a similar learning curve and the two robot can be trained simultaneously. Therefore, the investigators conduct this retrospective study to focus on this concern.
The Micro Hand S robor has been appiled in low anterior resection for rectal cancer. The safey and feasibility has been evaluated. However, the learning curve of this procedure is unclear. Specially,whether the two surgical robots (Micro Hand S and da Vinci) shared a similar learning curve and the two robot can be trained simultaneously are unclear.Therefore, this srudy is conducted to evaluate the learning curve of the two robots in low anterior resection.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
112
The surgeries are performed with the Micro Hand S robot and da Vinci robot
The surgeries are performed with the da Vinci robot
The Third Xiangya Hospital of Central South University
Changsha, Hunan, China
learning curve of console time
It was defined the cumulative sum plot of the consloe time in the chronological order.
Time frame: up to 1 week after operation
learning curve of docking time
It was defined the cumulative sum plot of the docking time in the chronological order.
Time frame: up to 1 week after operation
learning curve of surgicla failure
It was defined the cumulative sum plot of the docking time in the chronological order.
Time frame: up to 1 week after operation
Type of surgical procedure
It was defined as what type of procedure was pferformed, for example, low anterior, abdominal perineal resection
Time frame: up to 1 week after operation
Operative time (min)
It was defined as the duration from skin incision to skin closure
Time frame: up to 1 week after operation
Console time (min)
The console time was defined the fime that the surgeon performed the surgeon console.
Time frame: up to 1 week after operation
Docking time (min)
The docking time was the time from moving robotic instruments in the surgical field to setting robotic arms into the port sites
Time frame: up to 1 week after operation
Conversion
Conversion was defined as any change in strategy to open surgery
Time frame: up to 1 week after operation
Bloos loss (ml)
It was defined as the amount of blood in the whole surgical time
Time frame: up to 1 week after operation
Hospital stay (day)
It was defined as the length of hospital stay
Time frame: up to 1 month after operation
Protective ileostomy
It was defined as ileostomy which diverted the feces to to ensure anastomotic healing
Time frame: up to 1 month after operation
Retrieved lymph node
It was defined as the number of all the lymph nodes for each patient
Time frame: up to 1 month after operation
Surgical failure
Surgical failure was defined as the presence of one or more of the following four parameters: conversion, the positive surgical margins, severe postoperative complications, the number of harvested lymph nodes less than 12
Time frame: up to 1 month after operation
pTNM stage
It was defined as the pathological stage of the tumor according the TNM classification
Time frame: up to 1 month after operation
Tumor size (cm)
It was defined as the longitudinal diameter of the tumor
Time frame: up to 1 month after operation
Length of distal ressction margin (cm)
It was defined as the distance betwen the distal resection margin and the low margin of the tumor
Time frame: up to 1 month after operation
Status of the surgical margin
It was defined as whether the distal and circumferential resection margins was involved the tumor cell under microscope
Time frame: up to 1 month after operation
Quality of specimen
The quality of the speciman was graded according to the protocol proposed by Quirke
Time frame: up to 1 month after operation
Postoperative complication
It was defined as the adverse events after operation and the complications were classfied according to the Clavien-Dindo (C-D) classification
Time frame: up to 1 month after operation
Local recurrence
It was defined as the tumor was again found in the pelvic cavity
Time frame: at least 1 years after operation
Disease free survival
It was defined as the duration between the operation and date of the tumor recurrence
Time frame: at least 1 years after operation
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