Please assess the completion status of the following clinical trial:

Trial Title: Influence of the Concentration of the Local Anesthetic Ropivacaine on the Quality of a Ultrasound Guided Intermediate Cervical Block.

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

Eligibility Criteria:
Inclusion Criteria:~* patients scheduled for carotid endarterectomy in regional anesthesia~Exclusion Criteria:~* refusal to participate in the trail~* age \< 18a~* gestation/breastfeeding~* contraindication for regional anesthesia~* inclusion in other trails

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

Study Arms:
- ropivacaine 0,375% (Type: EXPERIMENTAL): In the study group the intermediate cervical block will be performed by ultrasound guidance using 20ml ropivacaine 0,375%. Additionally 10ml prilocaine 1% will be used to infiltrate the perivascular tissue around the carotid artery. In the area of the expected incision the skin will also be infiltrated with 10ml prilocaine 1%.
- ropivacaine 0,75% (Type: ACTIVE_COMPARATOR): In the control group the intermediate cervical block will be performed by ultrasound guidance using 20ml ropivacaine 0,75%. Additionally 10ml prilocaine 1% will be used to infiltrate the perivascular tissue around the carotid artery. In the area of the expected incision the skin will also be infiltrated with 10ml prilocaine 1%.

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