Please assess the completion status of the following clinical trial:

Trial Title: A Comparison of Inhalation vs. Intravenous Induction

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 6.0

Eligibility Criteria:
Inclusion Criteria:~Elective surgery Adult, age \>= 18 years old Scheduled for general anesthesia Medically fit and able to safely go any of the four anesthetic inductions in the study~Exclusion Criteria:~Emergency surgery, or any other aspiration risk Minor, age \<18 Pregnant Febrile illness Contraindication to nasal instrumentation Allergy to propofol Malignant hyperthermia Requiring Total Invravenous Anesthesia (TIVA) Inability to oxygenate on less than 50% FiO2 Intra-cranial surgery Receiving vasoactive medications Significant valvular heart disease Unstable cardiac disease Surgery requiring prone or lateral positioning Contraindication to nitrous oxide Prisoners

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

Study Arms:
- sevoflurane in 100% oxygen, age <56 (Type: ACTIVE_COMPARATOR): The intervention will be the randomized selection of anesthetic induction technique to sevoflurane in 100% oxygen and temperatures will be recorded per protocol. Age 18-55.
- sevoflurane in 50% nitrous, age <56 (Type: ACTIVE_COMPARATOR): The intervention will be the randomized selection of anesthetic induction technique to sevoflurane in 50% oxygen and 50% nitrous oxide. Age 18-55.
- propofol, age <56 (Type: ACTIVE_COMPARATOR): The intervention will be the randomized selection of anesthetic induction technique to intravenous induction with 2.2 mg/kg propofol. Age 18-55.
- propofol with phenylephrine, age <56 (Type: ACTIVE_COMPARATOR): The intervention will be the randomized selection of anesthetic induction technique to intravenous induction 2.2 mg/kg propofol immediately preceded by 160 mcg intravenous phenylephrine. Age 18-55.
- sevoflurane in 100% oxygen, age >55 (Type: ACTIVE_COMPARATOR): The intervention will be the randomized selection of anesthetic induction technique to sevoflurane in 100% oxygen and temperatures will be recorded per protocol. Age \>55.
- sevoflurane in 50% nitrous, age >55 (Type: ACTIVE_COMPARATOR): The intervention will be the randomized selection of anesthetic induction technique to sevoflurane in 50% oxygen and 50% nitrous oxide. Age \>55.

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