Please assess the completion status of the following clinical trial:

Trial Title: Effects of Nitroglycerin Versus Labetalol on Tissue Perfusion During Deliberate Hypotension

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

Eligibility Criteria:
Inclusion Criteria:~* Adult male or female patients~* 18-45 years~* ASA physical status I-II~* scheduled for FESS operations~Exclusion Criteria:~* uncontrolled hypertension~* cerebrovascular disorders~* coagulation disorders~* cardiovascular diseases~* renal impairment~* liver impairment~* history of allergic reaction to any of the study medications

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 45 Years
- Healthy Volunteers: f

Study Arms:
- group N (Type: EXPERIMENTAL): Patients in this group will receive Nitroglycerin infusion for deliberate hypotension at a rate of 0.5-2 μg /kg/min .
- group L (Type: ACTIVE_COMPARATOR): Patients in this group will receive Labetalol infusion for deliberate hypotension at a rate of be 0.5-2 mg/kg/h .

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