Chinese Med J Peking
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Chinese Med J Peking · May 1993
Research on hemodynamics of cerebral arteriovenous malformation by Doppler ultrasound.
Combined extracranial and transcranial Doppler (TCD) instruments were used to study the hemodynamics of 20 patients with cerebral arteriovenous malformation (AVM) proved angiographically. It was discovered that the flow velocities in AVM-feeding arteries and their proximal arteries were increased; the increase of flow velocities in feeding arteries close to AVM was more remarkable than that in feeding-arteries proximal to extracranial internal carotid artery far from AVM; pulsating indexes of AVM-feeding arteries were decreased; increase of flow velocities in AVM-feeding arteries was related to the decrease of pulsating index; the flow velocities of nontapering feeding arteries were faster than those of tapering arteries; the greater the size of AVM, the faster the velocity in feeding artery; and the flow velocities and pulsating indexes of AVM-feeding arteries were gradually recovered to normal 3-5 weeks after resection of AVM. ⋯ TCD combined with CT scans are helpful to the diagnosis of AVM. Combination of TCD and cerebral angiography (CAG) to evaluate comprehensively the preoperative hemodynamics of AVM and to monitor postoperative changes is helpful to detecting cerebral steal due to steal leakage in circle of Willis and preventing the hazardous postoperative complications caused by pressure breakthrough of normal perfusion.
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Chinese Med J Peking · May 1993
Air bronchogram in differential diagnosis of small peripheral lung cancers on CT image.
The computed tomographic (CT) images of 52 patients of small peripheral lung nodule < 3 cm proved pathologically were reviewed. Air bronchogram (AB) was found in 14 nodules on thin-section CT images, in which well or moderately differentiated small adenocarcinomas were only seen with lipidic growth. Squamous-cell, large-cell carcinomas and small benign lung nodules had no AB sign both on CT image and in pathologic specimens.
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Chinese Med J Peking · Nov 1992
Comparative StudyComparison of two pain rating scales among Chinese cancer patients.
The Simple Descriptive Scale (SDS) has been known to be easier to use, but lacks sensitivity when compared to the Visual Analogue Scale (VAS). In this study, 79 cancer patients quantified the intensity of their pain experience on both the VAS and SDS before receiving pain therapy and on the fifth day after commencing the therapy. ⋯ The results demonstrate that the SDS provides a simpler and, perhaps, equally sensitive alternative to the VAS, in measurement of cancer pain among Chinese patients. It would be particularly useful for those with language barriers and/or other factors in understanding the requirements or the VAS.
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This study for the first time provides the geometric parameters of the knee joint of Chinese, which is indispensible to the design of knee prosthesis used for compatriotic patients. Thirty-five items, including linear, radial and angular measurements, were taken from 105 cadaveric knees and knee X-ray films of 1,100 subjects. The method and calculation for proper correction of the X-ray image magnification and joint cartilage space was established. ⋯ Statistical analysis revealed that most of the linear and radial measurements were highly related while the angular measurements were independent of others. Principal component analysis showed that the width of femoral condyle might be taken as the leading index in determining the dimension of the knee, and regression functions were established to supply the serial parameters for prosthetic design. Multivariate discriminate functions could aid the selection of knee prosthesis.
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Chinese Med J Peking · Nov 1991
Effects of Hantaan virus on human endothelial cells and their significance in pathogenesis of hemorrhagic fever with renal syndrome.
The effects of Hantaan virus (HTNV) on human endothelial cells (HECs) were investigated both in vivo and in vitro. The 76-118 strain or SR-11 strain of HTNV were inoculated into HECs monolayers respectively, and the virus antigens could be detected on the seventh day of the first passage after inoculation by immunofluorescent technique. The HTNV could also be isolated through cultures of Vero E-6 cells. ⋯ It was found that HTNV antigens were widely distributed in the cytoplasm of endothelial cells of the samples from 5 out of 14 cases by avidin-biotin-peroxidase complex staining, and morphologic changes of the endothelial cells similar to those observed in vitro, were also seen by TEM. The results indicated that HEC is one of the target cells susceptible to HTNV. The virus could invade and propagate in HECs, and could induce damage to the latter.