title: Relationship of laryngeal dimensions to body size and gestational age in premature neonates and small infants.
abstract: The larynges of 27 infants weighing between 250 gm and 9160 gm were studied. Twenty-two neonates were from 24 to 40 weeks' gestational age. Five subjects died more than 6 weeks post partum but were included because of their small size. Relationships of larynx size to the standard clinical measurements of crown-heel length, crown-rump length, head circumference, and gestational age were developed. Cartilage size relationships to these measurements were found to be linear. Glottic length related linearly to crown-rump length but related in a curvilinear way to crown-heel length, head circumference, and gestational age. A guide to the choice of endotracheal tube sizes for small infants is suggested.
mesh_terms: D001724:Birth Weight; D001827:Body Height; D001835:Body Weight; D005500:Follow-Up Studies; D005865:Gestational Age; D005931:Glottis / Q000033:anatomy & histology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature; D007236:Infant, Small for Gestational Age; D007817:Laryngeal Cartilages / Q000033:anatomy & histology; D007830:Larynx / Q000033:anatomy & histology*