The Ontogeny of Cerebrovascular Critical Closing Pressure.
The Ontogeny of Cerebrovascular Critical Closing Pressure.
复制标题
脑血管临界闭合压的个体发生。
DOI:
10.1007/978-3-319-22533-3_50
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Kaiser,JeffreyR
中科院分区:
文献类型:
--
作者:
Rhee,ChristopherJ;Fraser3rd,CharlesD;Kibler,Kathleen;Easley,RonaldB;Andropoulos,DeanB;Czosnyka,Marek;Varsos,GeorgiosV;Smielewski,Peter;Rusin,CraigG;Brady,KenM;Kaiser,JeffreyR
Premature infants are at risk of vascular neurological insults. Hypotension and hypertension are considered injurious, but neither condition is defined with consensus. Critical closing pressure (CrCP) is the arterial blood pressure (ABP) at which cerebral blood flow ceases. CrCP may serve to define subject-specific low or high ABP. Our objective was to quantify CrCP as a function of gestational age (GA). One hundred eighty-six premature infants with a GA range of 23–33 weeks, were monitored with umbilical artery catheters and transcranial Doppler insonation of middle cerebral artery flow velocity (FV) for 1-h sessions over the first week of life. CrCP was calculated using an impedance model derivation with Doppler-based estimations of cerebrovascular resistance and compliance. CrCP increased significantly with GA (r= 0.47; slope = 1.4 mmHg/week gestation), an association that persisted with multivariate analysis (p< 0.001). Higher diastolic ABP and higher GA were associated with increased CrCP (p<0.001 for both). CrCP increases significantly at the end of the second and beginning of the third trimester. The low CrCP observed in premature infants may explain their ability to tolerate low ABP without global cerebral infarct or hemorrhage.
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影响因子:
5
作者:
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Harvey Checkoway
影响因子:
3.5
作者:
Selikoff,IJ;Nicholson,WJ;Lilis,R
通讯作者:
Lilis,R
DOI:
10.1093/jnci/79.1.13
发表时间:
1987
期刊:
Journal of the National Cancer Institute
影响因子:
--
作者:
J. Schoenberg;A. Stemhagen;T. Mason;J. Patterson;J. Bill;R. Altman
通讯作者:
R. Altman
DOI:
10.2105/ajph.50.10.1475
发表时间:
1960
期刊:
American journal of public health and the nation's health
影响因子:
--
作者:
J. E. Dunn;G. Linden;L. Breslow
通讯作者:
L. Breslow
DOI:
--
发表时间:
1987
期刊:
Scandinavian Journal of Work, Environment and Health
影响因子:
--
作者:
Bengt Sjögren;Annika Gustavsson;Lars Hedstrom
通讯作者:
Lars Hedstrom