نتایج جستجو برای: healthy subjects
تعداد نتایج: 546062 فیلتر نتایج به سال:
To study the appearance and distribution of the normal mucosa at the gastroduodenal junction in man, 14 specimens of normal mucosa, eight obtained during pylorplasty, and "relatively" normal specimens from the distal stomach and whole duodenum were examined microscopically. Three histologically distinct types of normal duodenal mucosa were found at this junction. These were termed antral type d...
The purpose of this descriptive study was to investigate differences in tracking ability between the involved and uninvolved hands of hemiparetic (n = 10) and healthy (n = 10) subjects. The subjects tracked a sine-wave target pattern by flexing and extending their index finger metacarpophalangeal joints. The amplitudes of the target patterns were proportional to each subject's active range of m...
BACKGROUND AND OBJECTIVE To noninvasively evaluate the retinal microvasculature in healthy human subjects with optical coherence tomography angiography (OCTA). PATIENTS AND METHODS Cross-sectional, observational study of five healthy subjects. OCTA was performed on 3 × 3 mm(2) sections centered on the fovea, nasal macula, and temporal macula. Retinal vasculature was assessed within three hori...
Dyspnea is a general term used to characterize a range of different descriptors; it varies in intensity, and is influenced by a wide variety of factors such as cultural expectations and the patient's experiences. Healthy subjects can experience dyspnea in different situations, e.g. at high altitude, after breath-holding, during stressful situations that cause anxiety or panic, and more commonly...
PURPOSE To characterize total retinal blood flow in a group of healthy subjects. METHODS Included in this study were 64 healthy volunteers. Retinal venous diameters were measured using a dynamic vessel analyzer. Retinal blood velocities were measured using bidirectional laser Doppler velocimetry. All vessels with a diameter of >60 μm entering the optic nerve head were measured. Total retinal ...
Previously unrecognized medical conditions identified in volunteers for early phase clinical studies have significant clinical and ethical implications for the participant. It is therefore crucial that the potential for unexpected diagnosis is addressed during the informed consent process. But the frequency of incidental diagnosis in healthy volunteers who attend for clinical trial screening re...
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