English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Calcium concentration in fetal lung fluid in lambs is relatively low, about 1.0 mEq/liter, and its concentration in alveolar fluid in mature rabbits is about 3 mEq/liter. To see if the Ca++ concentration changes at birth, we measured alveolar Ca++ as soon as possible after delivery by cesarean section and the onset of ventilation in eight anesthetized lambs at 144 days gestation. Subpleural alveoli were punctured with Ca++ selective microelectrodes as soon as 4 min and as late as 220 min after the onset of mechanical ventilation. The [Ca++] was 1.2 +/- 0.2 mEq/liter (mean +/- SD, n = 8) in fetal lung fluid collected before ventilation. After about 25 min of ventilation, alveolar Ca++ was not different from that in term lambs 24 to 72 h old (3.3 +/- 0.6 mEq/liter, n = 8). The [Ca++] increased with a t1/2 of about 10 min. Thus, alveolar Ca++ assumes a mature character very rapidly after the start of breathing in term lambs.

Calcium Increases in Pulmonary Alveolar Fluid in Lambs at Birth