Please assess the completion status of the following clinical trial:

Trial Title: IVPCA in the Management of Pain Following Major Intracranial Surgery

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: PHASE2/PHASE3
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Adults undergoing intracranial surgery~Exclusion Criteria:~* Patient refusal~* Pregnancy~* Aphasia~* Respiratory failure~* Allergy/intolerance to fentanyl~* Opioids use~* History of opioid-dependent pain,~* Patient has been in an investigational drug trial (except chemotherapy) in the month preceding the day of enrollment~* Mental or physical limitations that would prevent patient assessment or PCA use~* Chronic painful conditions unrelated to the reason for surgery,~* Clinically significant respiratory disease that required supplemental oxygen or ventilatory support such as use of mechanical ventilation or positive pressure ventilation~* Patient is unable to initiate a bolus dose of IVPCA fentanyl

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Supratentorial PCA fentanyl (Type: EXPERIMENTAL): None
- Supratentorial PRN fentanyl (Type: ACTIVE_COMPARATOR): None
- Infratentorial PCA fentanyl (Type: EXPERIMENTAL): None
- Infratentorial PRN fentanyl (Type: ACTIVE_COMPARATOR): None

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