title: [Partial thromboplastin time (PTT) in the pediatric age group. Normal values and changes under different storage conditions (author's transl)].
abstract: Normal values for PTT were obtained from 60 infants and children- age 3 days to 14 years- who had unremarkable preoperative coagulation tests and had tolerated surgical procedures without bleeding complications. The 27 infants, who were less than 0.5 years old, had significantly longer PTT-times (mean value 37.65 sec., extreme values 29.6-47.4 sec) than the older children (mean value: 32.72 sec., extreme values: 24.9-40.5 sec). These results, which were obtained with PTT-reagent ROCHE, are considerably shorter than comparable values in the literature. There were no differences in the values from boys or girls. No positive correlation between PTT and bleeding time were found. There were no significant changes of PTT when the whole blood had been stored at room temperature (22-25 degrees C) for 6 to 10 hours before it was tested.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001769:Blood; D001780:Blood Coagulation Tests / Q000379:methods*; D001793:Blood Preservation; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D012016:Reference Values; D012737:Sex Factors; D013696:Temperature; D013925:Thromboplastin
chemical_list: D013925:Thromboplastin
vernacular_title: Partielle Thromboplastinzeit (PTT)-Bestimmung im Kindersalter. Normalwerte und Veränderungen unter verschiedenen Lagerungsbedingungen