Rott H D
Institut für Humangenetik, Universität Erlangen-Nürnberg.
Ultraschall Med. 1997 Oct;18(5):226-8. doi: 10.1055/s-2007-1000430.
In animals pulsed diagnostic ultrasound is capable of causing subpleural capillary lung bleeding if the pressure amplitude is above 1 MPa. Precondition is pulmonary ventilation; fetal organs are, therefore, not at risk. Capillary lung bleeding is a threshold effect depending on pressure amplitude and frequency. The degree of injury is apparently also influenced by the alveolar size. The same effect can be observed in the intestine at pressure amplitudes above 2 MPa. It is not known whether the effect is also caused by sonographic examination in humans. Should this be the case, the lesions would be of minor relevance and probably without any clinical symptoms. Nevertheless, during examination it would be advisable to restrict the ultrasound exposure of lung and intestine to the minimum necessary for reliable diagnosis.
在动物中，如果脉冲诊断超声的压力幅值高于1兆帕，就能够导致肺胸膜下毛细血管出血。前提条件是肺部通气；因此，胎儿器官没有风险。肺毛细血管出血是一种取决于压力幅值和频率的阈值效应。损伤程度显然也受肺泡大小的影响。在压力幅值高于2兆帕时，在肠道中也能观察到同样的效应。目前尚不清楚这种效应在人类超声检查中是否也会出现。如果是这样，这些损伤的相关性较小，可能没有任何临床症状。然而，在检查过程中，建议将肺部和肠道的超声暴露限制在可靠诊断所需的最低限度。
