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Biomedical subjects

T S Tang

Publications and source records attributed to T S Tang.

25 records · Page 2Linked to original sources
PubMed1989

[Short segment peduncular fixation in the treatment of thoraco-lumbar fracture].

Thirty cases with unstable fracture of thoracolumbar spine were treated by a method of short segment peduncular fixation with a set of instrument newly designed. The mean values of the pre-operative Cobb's angles and anterior compression angles were 22.4 degrees and 23.1 degrees respectively, while post-operatively, they decreased to be 3.2 degrees and 6.3 degrees accordingly (P less than 0.01). CT scanning done on 16 patients with neurological deficit showed that the sagittal diameter of the fractured vertebrae, on average, was 7.5 mm before operation and was 12.7 mm post-operatively (P less than 0.01). It demonstrated that the fracture deformities i.e. kyphosis, lordosis, rotation, separation and compression had been corrected by procedures with this set of fixation system. Procedures of the operation with this set of instrument were discussed in detail.

Adult↗
PubMedDate not supplied

Barriers to fecal occult blood testing and sigmoidoscopy among older Chinese-American women.

PURPOSE: This study examined factors associated with fecal occult blood test (FOBT) and sigmoidoscopy screening use among Chinese-American women age 60 years and older. DESCRIPTION OF STUDY: One hundred women were recruited from senior centers in two metropolitan areas on the east coast of the United States. Participants completed a questionnaire that included sections on demographics, health history, health insurance coverage, FOBT and sigmoidoscopy use, common and cultural barriers to colorectal cancer screening, and acculturation. RESULTS: Logistic regression models found greater acculturation to be a significant predictor of having had a FOBT at least once, and found both greater acculturation and physician recommendation to be significant predictors of having had a sigmoidoscopy at least once. No significant predictors were found for regular adherence to colorectal screening guidelines, which include having undergone an FOBT in the past year and sigmoidoscopy in the past 5 years. CLINICAL IMPLICATIONS: This study found that older Chinese-American women underuse FOBT and sigmoidoscopy screening, as is recommended by the American Cancer Society colorectal cancer screening guidelines. These findings suggest that cultural factors may influence the initiation of colorectal cancer screening for Chinese-American women but are not predictive of adherence to screening over time. Outreach efforts to promote colorectal cancer screening in this population might target women who are less acculturated to facilitate an initial entry into the Western healthcare system to obtain screening.

Aged↗
PubMedDate not supplied

Autostage sperm tracing system for semen evaluation.

To overcome the limitation of the microscope field, the study proposed an autostage sperm tracing system (ASTS), which could trace a particular sperm for a long time and distance. The ASTS was constructed by assembling a commercial microscope, an image frame grabber, a personal computer, and a motorized stage. Its performance was tested by evaluating 6 semen samples and by comparing the evaluation with those of other semen evaluations. The ASTS broke through the limitation of the microscope field and traced a particular sperm as long as possible. It analyzed the sperm track and calculated the motility parameters, such as curvilinear velocity (Vcl), straight-line velocity (Vsl), and linearity (L(in)). The sperm quality was then evaluated in real time, and the user could decide to capture or abandon a particular sperm in the IVF The ASTS enables users to evaluate sperm progression for a long time and to have the global quality of a particular sperm in real time. Its open structure has the flexibility for micromanipulating a semen sample, and has the potential application associated with a modern IVF technique.

Algorithms↗
PubMedDate not supplied

Liquid chromatographic detection of Dowtherm A contamination in oleochemicals and edible oils.

A rapid and direct liquid chromatographic (LC) technique is described for the determination of a eutectic mixture of diphenyl oxide and biphenyl such as Dowtherm A thermal heating fluid (THF) in oleochemicals and palm olein. Analysis is performed with an RP-18 column with fluorescence detection (excitation at 247 nm and emission at 310 nm). The isocratic mobile phase (1.0 mL/min) consists of methanol and water (90 + 10, v/v). A linear calibration model (correlation coefficient = 0.9999) was developed directly from used Dowtherm A THF with the biphenyl peak (4.70 min) as a marker. Average recoveries from spiked glycerin, fatty alcohol mixture, methyl ester mixture, fatty acids, and palm olein were 90.9-108.7%, with a detection limit of 0.1 microgram/mL. The technique requires no prior sample cleanup nor extraction steps and is good for quality assurance purposes.

Chromatography, Liquid↗