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Case 2: A Late Preterm Newborn with Cyanosis
- Source :
- NeoReviews. 17:e166-e169
- Publication Year :
- 2016
- Publisher :
- American Academy of Pediatrics (AAP), 2016.
-
Abstract
- A male newborn is delivered at 35 -6/7 weeks’ gestational age with a birthweight of 2,700 g (50th percentile) to a gravida 3, para 2, 33-year old mother by elective lower segment cesarean section for prolonged rupture of membranes. Fetal ultrasound is unremarkable; a complete course of antenatal steroids and 2 doses of benzylpenicillin are administered. Apgar scores are 7 and 9 at 1 and 5 minutes, respectively. Maternal history is unremarkable except for a treated urinary tract infection at 33 weeks. Group B streptococcal screening is negative. Umbilical arterial blood gas shows a pH of 7.30; base deficit of 1.5 mmol/L; and lactate of 3.6 mmol/L. At 1 hour of age, the infant is noted to have cyanosis and tachypnea, with respiratory rates of 80 to 90 breaths per minute, requiring 50% of incubator oxygen and subsequently nasal continuous positive airway pressure to maintain oxygen saturation of 91% to 95%. There is no pre- and postductal saturation gradient, and thoracic transillumation excludes a significant pneumothorax. On examination, the precordial impulse and femoral pulses are normal, heart sounds are dual, and a 1/6 systolic murmur at the lower left sternal edge is heard. There is no hepatosplenomegaly. Capillary blood gas shows the following: pH, 7.26; partial pressure of carbon dioxide, 62 mm Hg (8.2 kPa); partial pressure of oxygen (Pao2), 34 mm Hg (4.5 kPa); base excess, –1.8; plasma lactate, 30.6 mg/dL (3.4 mmol/L); and serum glucose, 45 mg/dL (2.5 mmol/L). Intravenous access is obtained with a full blood count and blood culture, and benzylpenicillin and gentamicin are administered. Arterial blood sampling from the right radial artery demonstrates Pao2 of 49 mm Hg (6.5 kPa) in 50% inspired oxygen (Fio2), which does not increase in 90% Fio2. An echocardiogram at 5 …
- Subjects :
- business.industry
medicine.medical_treatment
Gestational age
030204 cardiovascular system & hematology
Tachypnea
03 medical and health sciences
0302 clinical medicine
030225 pediatrics
Anesthesia
Pediatrics, Perinatology and Child Health
medicine
Arterial blood
Rupture of membranes
Base excess
Continuous positive airway pressure
Respiratory system
medicine.symptom
business
Oxygen saturation (medicine)
Subjects
Details
- ISSN :
- 15269906
- Volume :
- 17
- Database :
- OpenAIRE
- Journal :
- NeoReviews
- Accession number :
- edsair.doi...........f7edb625a7d9c8d17eb2199e0691d7cc
- Full Text :
- https://doi.org/10.1542/neo.17-3-e166