Please assess the completion status of the following clinical trial:

Trial Title: NIRS Measurement After SCP Block

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:~* all patients undergoing surgery under regional anaesthesia~Exclusion Criteria:~* patients refusal

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

Study Arms:
- Supraclavicular Nerve Block (Type: None): Patients undergoing vascular surgery for creation or revision of an arterio-venous fistula. Intervention: supraclavicular plexus block for anaesthesia. NIRS measurement before and after brachial plexus block.

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