Please assess the completion status of the following clinical trial:

Trial Title: Effect of a Bolus of 10 µg/kg of Alfentanil on the Pupillary Pain Index

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: DIAGNOSTIC
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* Elective surgery under general anesthesia~* Written informed consent~Exclusion Criteria:~* Chronic pain~* Preoperative analgesic drug~* Neurologic disease~* Ophtalmic disease

- Gender: ALL
- Minimum Age: 2 Years
- Maximum Age: 18 Years
- Healthy Volunteers: f

Study Arms:
- alfentanil (Type: EXPERIMENTAL): Children under general anesthesia for elective surgery. Induction with sevoflurane or propofol according to the preference of the patient.~Maintenance with sevoflurane. 5 minutes before skin incision, first assessment of the pupillary pain index. Then injection of 10 µg/kg of alfentanil. After 5 minutes second assessment of pupillary pain index. End of study period, beginning of surgery.

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