Research Article
A High Ductal Flow Velocity Is Associated with Successful Pharmacological Closure of Patent Ductus Arteriosus in Infants 22–27 Weeks Gestational Age
Table 2
Characteristics at time of echocardiography.
| | | Ductus closed () | Ductus persistent () | |
| | Age at echocardiography, days (range) | 2 (0–7) | 2 (0–33) | 0.079 | | Ventilator (%) | 10 (34) | 16 (59) | 0.108 | | Ventilator MAP, cmH2O (range) | 8 (6–14) | 9 (7–12) | 0.220 | | CPAP (%) | 19 (66) | 11 (41) | 0.108 | | CPAP pressure, cmH2O (range) | 5 (4–7) | 5 (3–7) | 0.618 | | Fraction of inspired oxygen, % (range) | 25 (21–52) | 27 (21–42) | 0.848 | | Systolic blood pressure1, mmHg (range) | 47 (37–62) | 47 (35–84) | 0.987 | | Ductal diameter, mm (range) | 1.7 (0.9–3.0) | 1.8 (1.0–3.0) | 0.399 | | Maximal ductal flow velocity, m/s (range) | 1.6 (0.5–2.7) | 1.1 (0.7–2.9) | 0.023 | | LA/Ao (range) | 1.5 (1.2–2.8) | 1.7 (1.1–3.5) | 0.198 |
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121 versus 15 infants had an arterial catheter which enabled blood pressure measurements.
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