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DA patency status and flow direction in piglets with an open DA as determined by 4D flow. DA flow direction was determined from peak arterial systole and end‐diastole
| Age relative to term (days) | ||||
|---|---|---|---|---|
| DA status | T−9 | T−3 | T+1 | T+5 |
| Closed | 3 | 0 | 3 | 4 |
| Open | 9 (75%) | 10 (100%) | 5 (63%) | 0 (0%) |
| Forward | 2 | 3 | 1 | — |
| Reversed | 4 | 5 | 0 | — |
| Bidirectional | 3 | 2 | 4 | — |
