Please assess the completion status of the following clinical trial:

Trial Title: Ketofol for Preventing Postoperative Delirium in Elderly Patients

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE4
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Patient acceptance.~* Age ≥ 60 years old.~* American society of anesthesia (ASA) (II-III).~* Gender: males \&females~* BMI \< 35kg/m2.~* able to communicate verbally.~* Scheduled for exploration surgery for intestinal obstruction under general anesthesia of at least 60 min duration~Exclusion Criteria:~* Patient refusal.~* Patients with delirium prior to surgery.~* Patients with drug misuse history or taking anti-psychotic drugs.~* Previous hospitalization within 3 months.~* Legal blindness, severe deafness.~* History of Acute cerebrovascular conditions; stroke or transient ischemic attack.~* Patients who could not be prepared with proper fluid resuscitation, electrolyte and acid-base correction prior to surgery.~* Patients who could be discharged from the intensive care unit (ICU) within two days.~* Patients with a known history of allergy to study drugs

- Gender: ALL
- Minimum Age: 60 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Control group (Type: PLACEBO_COMPARATOR): 21 ml of normal saline 0.9% will be I.V continuously infused fifteen minutes after induction of anesthesia up to two hours postoperatively.
- ketofol group (Type: ACTIVE_COMPARATOR): 21 ml of a mixture of (ketamine and propofol) will be I.V continuously infused fifteen minutes after induction of anesthesia up to two hours postoperatively
- dexmedetomidine group (Type: ACTIVE_COMPARATOR): 21 ml of a mixture of (dexmedetomidine diluted with normal saline 0.9%) will be I.V continuously infused fifteen minutes after induction of anesthesia up to two hours postoperatively

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