Please assess the completion status of the following clinical trial:

Trial Title: CO2 Versus Lund De-airing Technique in Heart Surgery

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

Eligibility Criteria:
Inclusion Criteria:~* Patients planned for aortic valve/root replacement or repair will be selected for the study~Exclusion Criteria:~Patients with known~* chronic obstructive pulmonary disease,~* emphysema,~* previous thoracic or cardiac surgery,~* history of CVA or stroke and~* evidence of intraoperative pleural adhesions will be excluded from the study.~* Patients requiring internal mammary artery coronary bypass will also be excluded.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 90 Years
- Healthy Volunteers: f

Study Arms:
- Lund de-airing (Type: EXPERIMENTAL): Lund de-airing technique
- Carbon-dioxide insufflation (Type: ACTIVE_COMPARATOR): carbon-dioxide insufflation will be provided to the open mediastinal wound in a standardized manner

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