Perinatale Atmung

Bartels, H.; Riegel, K; Wenner, J; Wulf, H

doi:10.1007/978-3-642-65447-3

Cited by 34 publications

(4 citation statements)

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“…A number of authors assume that, with the first breaths, the ventilation of the lungs is deemed completed [12, 20, 21]. Other working groups assume, according to their findings, that this process is completed nearly fully with the twelfth hour of life [15, 16, 39–42].…”

Section: Discussionmentioning

confidence: 99%

“…Two very important essential processes in the first few seconds and minutes of life are closely linked: the cardiorespiratory transition and the induction of the first breath [1, 6–8, 12, 22, 23, 44]. Controversially discussed is whether the first air intake in the trachea-bronchial section of respiratory system happens actively or passively [20, 21, 42, 45].…”

Section: Discussionmentioning

confidence: 99%

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Computer Tomographic Illustration of the Development of the Pulmonary Function in Bovine Neonates until the Twenty-First Day Postnatum

Linke

Bostedt

Richter

2013

Veterinary Medicine International

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The aim of this study was to analyze the development of the lung in newborn calves. The sample consisted of 28 Holstein Friesians calves which were examined clinically, and their chest segment was measured with computed tomography. The tests were performed on the first, sixth, and twelfth hours of life and after the first, second, and third weeks. Also, blood gases and blood counts were determined. Besides Kolmogorov-Smirnov tests, analyses of variance, t-tests (on a significance level of P < 0.05), and correlation analyses were used. The most significant changes occurred between birth and the first hour. However, there were significant differences in the gas filling between cranial and caudal and between dorsal and ventral parenchyma segments. This difference remained over the entire study period. At the end of the first week between 85 and 93% were involved in gas exchange. Only after the completion of the second week of life, the air supply was achieved throughout the whole lung. The pO2, pCO2, and pH values confirmed this. This study shows that a healthy bovine neonate needs about 2 weeks before all lung units are integrated into the gas exchange. This explains why calves in unfavorable environments often suffer from pulmonary affections.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Computer Tomographic Illustration of the Development of the Pulmonary Function in Bovine Neonates until the Twenty-First Day Postnatum

Linke

Bostedt

Richter

2013

Veterinary Medicine International

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“…relatl vely unchanged (BARTELS et al 1972 [3], Estrogens seem to have a culminative effect BONICA 1973 71, CUGELL et al 1953 [19], MARX upon the condition (ÜOERING et al 1950 [22], and °R KIN 1958 I 55 D· The mmute volume is 40 WILBRANDT 1959 [85]). What still remains ^ 50% higher dunng pregnancy than in a nonunclear, despite more recent research, is the P re gn an t state (BARTELS et al 1972 [3], CUGELL actual mode of action of the hormones. The et aL 1953 I 19 ])· Because the dead space does claim, made by DOERING et al 1950 [22], that not chan S e significantly during pregnancy, an progesterone changes the sensibility of the res-mcrease of 60 to 70% in alveolar ventilation piratory center, finds little support after more resultsrecent investigation (MACHIDA 1981 [51]).…”

Section: The Causes Of Hyperventilationmentioning

confidence: 99%

Review article

Huch¹

1986

Journal of Perinatal Medicine

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“…In studies of the new-born calf, the effect of increasing ventilation could so far only be indirectly reconstructed by means of pulse oximetry or arterial blood gas analyses [ 7 , 8 , 9 ]. However, using radiographic observations, early studies on babies showed that complete pulmonary ventilation is achieved after a few breaths to a few hours after birth [ 6 , 10 , 11 ]. Serial sonographic and radiographic examinations of the lungs showed that 64% of calves born without difficulty had ventilation of all lung regions as early as 1 h after birth [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Postnatal Pulmonary Adaption in Bovine Neonates Using Electric Impedance Tomography (EIT)

Bleul

Wey

Meira

et al. 2021

Animals

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Several aspects of postnatal pulmonary adaption in the bovine neonate remain unclear, particularly the dynamics and regional ventilation of the lungs. We used electric impedance tomography (EIT) to measure changes in ventilation in the first 3 weeks of life in 20 non-sedated neonatal calves born without difficulty in sternal recumbency. Arterial blood gas variables were determined in the first 24 h after birth. Immediately after birth, dorsal parts of the lungs had 4.53% ± 2.82% nondependent silent spaces (NSS), and ventral parts had 5.23% ± 2.66% dependent silent spaces (DSS). The latter increased in the first hour, presumably because of gravity-driven ventral movement of residual amniotic fluid. The remaining lung regions had good ventilation immediately after birth, and the percentage of lung regions with high ventilation increased significantly during the study period. The centre of ventilation was always dorsal to and on the right of the theoretical centre of ventilation. The right lung was responsible for a significantly larger proportion of ventilation (63.84% ± 12.74%, p < 0.00001) compared with the left lung. In the right lung, the centrodorsal lung area was the most ventilated, whereas, in the left lung, it was the centroventral area. Tidal impedance changes, serving as a surrogate for tidal volume, increased in the first 3 weeks of life (p < 0.00001). This study shows the dynamic changes in lung ventilation in the bovine neonate according to EIT measurements. The findings form a basis for the recognition of structural and functional lung disorders in neonatal calves.

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Perinatale Atmung

Cited by 34 publications

References 0 publications

Computer Tomographic Illustration of the Development of the Pulmonary Function in Bovine Neonates until the Twenty-First Day Postnatum

Computer Tomographic Illustration of the Development of the Pulmonary Function in Bovine Neonates until the Twenty-First Day Postnatum

Review article

Assessment of Postnatal Pulmonary Adaption in Bovine Neonates Using Electric Impedance Tomography (EIT)

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