| 词汇 | example_english_umbilical-vein |
| 释义 | umbilical veincollocation in Englishmeanings of veinThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with vein. vein noun uk /veɪn/ us /veɪn/ a tube that carries blood to the heart from the other parts of ... See more at vein Examples of umbilical veinThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Our initial attempt at venous access is via the umbilicalvein in infants presenting in the first week of life. Catheterized via the umbilicalvein, echo was not adequately used to guide the catheter below the diaphragm. Fetal analgesia is carried out by injection of an analgesic, for example sufentanil, into the umbilicalvein; 5 micrograms is usually considered sufficient. The ductus venosus now forms a continuation of the umbilicalvein towards the subcardial inferior vena cava. Reversed velocities occur during atrial contraction due to pressure gradients between the right atrium and the umbilicalvein. This mechanism would prevent a reduction in the umbilicalvein oxygen content in response to physiologic stress such as movementinduced local alterations to intra-abdominal pressure. In this poster presentation the anatomy of the portal vein system, the ductus venosus and umbilicalvein is demonstrated. There is reversed flow in diastole in the umbilical artery and pulsatile flow in the umbilicalvein. Pulsations of the umbilicalvein may also reflect increased central venous pressure transmitted via the ductus venosus. The small proportion of the energy transmitted to the umbilicalvein is usually not sufficient to cause visible pulsation. Umbilicalvein blood flow is reduced in growth restricted fetuses. The right-sided atrium was reached through the umbilicalvein via the venous duct. The umbilicalvein is a sizeable vessel and acts as a reservoir. Traditionally, the measurement has been taken from the straight portion of the intraabdominal umbilicalvein. Thus, the pressure (and kinetic energy) in the umbilicalvein is vital for the fetus. Thus, a larger proportion of the wave arrives in the umbilicalvein and may induce pulsation, particularly if the a-wave was augmented in the first place. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Want to learn more? Go to the definition of vein See other collocations with vein |
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