Please assess the completion status of the following clinical trial:

Trial Title: Effect of Butorphanol on Colonoscopy for Patients With Postoperative Visceral Pain

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* ASA status I-11~* patients performing colonoscopy~* sign the informed consent~Exclusion Criteria:~* BMI\>30, pregnant~* diabetes~* depression~* patients dependent on opioids~* hypertension poorly controlled~* serious complications of important organs~* obvious abdominal pain before colonoscopy

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- Butorphanol group (Type: EXPERIMENTAL): None
- control group (Type: PLACEBO_COMPARATOR): None

Based on this trial design, predict the completion outcome and termination type (if applicable).