外部传输速率(External Transfer Rate)
外部传输速率,一般也称为突发数据传输或接口传输率.是指硬盘缓存和电脑系统之间的数据传输率,也就是计算机通过硬盘接口从缓存中将数据读出交给相应的控制器的速率.平常硬盘所采用的ATA6 6、ATA...外部传输速率(External Transfer Rate)
外部传输速率,一般也称为突发数据传输或接口传输率.是指硬盘缓存和电脑系统之间的数据传输率,也就是计算机通过硬盘接口从缓存中将数据读出交给相应的控制器的速率.平常硬盘所采用的ATA6 6、ATA100、ATAI33等接口,就是以硬盘的理论最大外部数据传输率来表示的.ATA100中的100就代表着这块硬盘的外部数据传输率理论最大值是100MB/s,目前SATA接口的硬盘外部理论数据最大传输率可达150MB/s.展开更多
Objective： Spontaneous intracranial hypotension （SIH） is recognized far more commonly than ever before. Though usually characterized by low cerebrospinal fluid （CSF） pressure, some patients with SIH are observed ...Objective： Spontaneous intracranial hypotension （SIH） is recognized far more commonly than ever before. Though usually characterized by low cerebrospinal fluid （CSF） pressure, some patients with SIH are observed to have normal pressure values. In this study, we aimed to confirm the proportion of patients with normal CSF opening pressure （CSF OP） and explore the factors affecting CSF OP in SIH patients. Methods： We retrospectively reviewed 206 consecutive SIH patients and analyzed their clinical and imaging variables （including demographic data, body mass index （BMI）, duration of symptoms, and brain imaging findings）. Univariate and multiVariate analyses were performed to identify the potential factors affecting CSF OP. Results： In a total of 114 （55.3%） cases the CSF OP was 〈60 mmH2O （1 mmH2O=9.80665 Pa）, in 90 （43.7%） cases it was between 60 and 200 mmH2O, and in 2 （1.0%） cases it was 〉200 mmH2O. Univadate analysis showed that the duration of symptoms （P〈0.001）, BMI （P〈0.001）, and age （P=0.024） were positively correlated with CSF OP. However, multivariate analysis suggested that only the duration of symptoms （P〈0.001） and BMI （P〈0.001） were strongly correlated with CSF OP. A relatively high R2 of 0.681 was obtained for the multivariate model. Conclusions： Our study indicated that in patients without a low CSF OP, a diagnosis of SIH should not be excluded. BMI and the duration of symptoms can influence CSF OP in SIH patients, and other potential factors need further investigation.展开更多
文摘外部传输速率(External Transfer Rate)
外部传输速率,一般也称为突发数据传输或接口传输率.是指硬盘缓存和电脑系统之间的数据传输率,也就是计算机通过硬盘接口从缓存中将数据读出交给相应的控制器的速率.平常硬盘所采用的ATA6 6、ATA100、ATAI33等接口,就是以硬盘的理论最大外部数据传输率来表示的.ATA100中的100就代表着这块硬盘的外部数据传输率理论最大值是100MB/s,目前SATA接口的硬盘外部理论数据最大传输率可达150MB/s.
文摘Objective： Spontaneous intracranial hypotension （SIH） is recognized far more commonly than ever before. Though usually characterized by low cerebrospinal fluid （CSF） pressure, some patients with SIH are observed to have normal pressure values. In this study, we aimed to confirm the proportion of patients with normal CSF opening pressure （CSF OP） and explore the factors affecting CSF OP in SIH patients. Methods： We retrospectively reviewed 206 consecutive SIH patients and analyzed their clinical and imaging variables （including demographic data, body mass index （BMI）, duration of symptoms, and brain imaging findings）. Univariate and multiVariate analyses were performed to identify the potential factors affecting CSF OP. Results： In a total of 114 （55.3%） cases the CSF OP was 〈60 mmH2O （1 mmH2O=9.80665 Pa）, in 90 （43.7%） cases it was between 60 and 200 mmH2O, and in 2 （1.0%） cases it was 〉200 mmH2O. Univadate analysis showed that the duration of symptoms （P〈0.001）, BMI （P〈0.001）, and age （P=0.024） were positively correlated with CSF OP. However, multivariate analysis suggested that only the duration of symptoms （P〈0.001） and BMI （P〈0.001） were strongly correlated with CSF OP. A relatively high R2 of 0.681 was obtained for the multivariate model. Conclusions： Our study indicated that in patients without a low CSF OP, a diagnosis of SIH should not be excluded. BMI and the duration of symptoms can influence CSF OP in SIH patients, and other potential factors need further investigation.
