Please assess the completion status of the following clinical trial:

Trial Title: Butterfly Sensor With Rev K Version

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: COHORT
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* Male of non-pregnant female 18 y/o or older~* American Society of Anesthesiologists Classification 1,2 or 3~* Scheduled to undergo spine or hip surgery~Exclusion Criteria:~* Pregnant or nursing~* Patients who in the investigators clinical judgement would not be suitable for research

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

Study Arms:
- Patients undergoing spine surgery (Type: None): None

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