Oberflächenspannungseigenschaften der Lunge Neugeborener

Baum, M.; Benzer, H; Lempert, J.; Regele, Heinz; W, Stühlinger; Tölle, W

doi:10.1007/bf02088692

Cited by 1 publication

(2 citation statements)

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“…The measurements were done at room temperature with 30 sec stress adaption time. The P/V diagrams were recorded with an x/y recorder and the tangential constant calculated, the normal value being 0.77 [1].…”

Section: Methodsmentioning

confidence: 99%

“…The duration of a cycle was 4 min, the measurements were performed at room temperature. The following parameters were evaluated: surface tension at 100% sur face (;.> max) and at 20% of the initial surface (y min) and hysteresis area (cm2) [1], Bubble stability ratio (Pattle technique). From aerated parts of the lung, bubbles were squeezed into suspended drops of 0.9% saline, atelectatic lungs were inflated before the test.…”

Section: Methodsmentioning

confidence: 99%

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Surface Properties of Amniotic Fluid and Fetal Lung Maturity

Lempert¹,

Müller-Tyl²,

Steinbereithner³

et al. 1976

Respiration

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Surface activity of 75 amniotic fluid samples from pregnancies which ended before term or at term with small-for-date newborns was measured in the surface balance. The results were correlated with the clinical symptomatology and the birth weight of the newborn. The surface properties of the lungs of those infants who had died were assessed by the buble stability method (Pattle), by recording of pressure-volume diagram and by measurements of surface activity of lung extracts. The results indicate that γ-min is the essential parameter in determining the degree of fetal lung maturity. In cases with γ-min values of amniotic fluid above 27 dyn/ cm, a 100% respiratory distress syndrome (RDS) incidence is to be expected; values between 23 and 27 dyn/cm have a 70%, values between 17 and 23 dyn/cm have a 30% incidence of RDS and in all cases with values below 17 dyn/cm, RDS may be ruled out. When induced delivery before term is considered, this method of determining the degree of fetal lung maturity is, therefore, of significant prognostic reliability.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%