“…Besides, compared with the previous studies, our patient group has very low gestational age and birth weight medians, reflecting the patient population with the highest mechanical ventilation need and possible radiation exposure. 3,13 Our study shares some significant results with the valuable studies mentioned above. However, we think that; this is the first study to collect these prominent features in one study, such as; the application of USG by neonatologists, high visualization rate, and optimum patient number, and most importantly, very low gestational age and birth weight values; in one study.…”