General information and data sources
After establishment of the optimization measures, 321 patients for gastrointestinal surgery were selected from 2017.12 to 2019 .02 to examine whether the measures were effective. The surgery preparation process for patients in the optimization group is led by the surgeon in our department and is performed in close cooperation with the surgeon, nurse, and anesthesiologist to implement the optimization measures established in the discussion. Patients in other departments composed the control group (the surgeons, anesthesiologists, and operating room nurses in control group were not informed about the content of this study. The data were obtained from operating room monitoring recording). The control group of anesthesiologists, surgeons, and operating room nurses performed the routine procedures.
Inclusion criteria: 1, 18 to 75 years old; 2, Gastrointestinal surgery; 3, General anesthesia for tracheal intubation; 4. Urinary catheterization in the operating room. Exclusion criteria: An unexpected situation that caused the operation procedure to be delayed(one 74-year-old man’s false teeth fall into epiglottis during orotracheal intubation, another 65-year-old man has difficult to insert catheter and then had cystostomy, the data of the above two patients were excluded from analysis because they are outlier). Firstly, we recorded the start time of anesthesia induction, start time and end time of urinary catheterization, start time and end time of disinfection, start time of operation of the patients in the supine position (catheterizing on the operating table before disinfection). Then calculated the time from start of anesthesia to beginning of urinary catheter, catheterization time, time from catheterization to start of disinfection, disinfection time, draping time, time from end of draping to start of surgery. we also recorded the start of anesthesia induction, position start time and end time, disinfection start time and end time of disinfection and draping, urinary catheterization start time and end time, draping end time, operation start time of the surgical patients in lithotomy position (catheterizing on the operating table after disinfection), and calculated the time from the start of anesthesia to adjusting posture, the time of adjusting posture, the time from the end of the posture to the start of the disinfection, the time of the disinfection, catheterization, and draping, the time from the end of draping to the start of surgery.