system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A newborn is evaluated by the on-call pediatrician. She was born at 33 weeks gestation via spontaneous vaginal delivery to a 34-year-old G1P1. The pregnancy was complicated by poorly controlled diabetes mellitus type 2. Her birth weight was 3,700 g and the appearance, pulse, grimace, activity, and respiration (APGAR) scores were 7 and 8 at 1 and 5 minutes, respectively. The umbilical cord had 3 vessels and the placenta was tan-red with all cotyledons intact. Fetal membranes were tan-white and semi-translucent. The normal-appearing placenta and cord were sent to pathology for further evaluation. On physical exam, the newborn’s vital signs include: temperature 36.8°C (98.2°F), blood pressure 60/44 mm Hg, pulse 185/min, and respiratory rate 74/min. She presents with nasal flaring, subcostal retractions, and mild cyanosis. Breath sounds are decreased at the bases of both lungs. Arterial blood gas results include a pH of 6.91, partial pressure of carbon dioxide (PaCO2) 97 mm Hg, partial pressure of oxygen (PaO2) 25 mm Hg, and base excess of 15.5 mmol/L (reference range: ± 3 mmol/L). What is the most likely diagnosis?
assistant
Infant respiratory distress syndrome