Please assess the completion status of the following clinical trial:

Trial Title: Fentanyl Test in Children's Adenotonsillectomy

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: COHORT
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:meet all of the following~1. the American society of anesthesiologists (ASA) class Ⅰ \~ Ⅱ~2. the age of 3 \~ 7 years old~3. children who underwent selective adenotonsillectomy.~Exclusion Criteria:meet anyone of the following~1. craniofacial malformations~2. mental retardation~3. BMI \> 22 kg/m2~4. a history of bronchial asthma~5. a recent history of opioid use.

- Gender: ALL
- Minimum Age: 3 Years
- Maximum Age: 7 Years
- Healthy Volunteers: t

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