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Biomedical subjects

A Tsui

Publications and source records attributed to A Tsui.

8 recordsLinked to original sources
PubMed1998

Reproduction, risk and reality: family planning and reproductive health in northern Vietnam.

In collaboration with the National Committee for Population and Family Planning, a study was conducted in 1994 in two Vietnamese communes to provide community level information on women's reproductive health and behaviors. A survey of 504 rural and 523 urban women collected five-year histories of reproduction, contraception, abortion and symptoms of Reproductive Tract Infections (RTI). This analysis focuses on the relationships between women's individual characteristics, use of family planning and abortion, and reported RTI symptoms. The findings reveal that IUDs do not raise women's likelihood of experiencing RTI symptoms in either commune. A recent abortion, however, strongly increases women's likelihood of having RTI symptoms in the rural commune, while low-socioeconomic status is associated with RTI symptoms in the urban commune.

Adult↗
PubMed1998

Contraception and abortion in two Vietnamese communes.

OBJECTIVES: The authors examined factors predicting abortion use in two communes in northern Vietnam. METHODS: A survey of 504 rural and 523 urban women of childbearing age was conducted. RESULTS: For the 13.6% of urban and 19% of rural commune women having had an abortion in the previous year, logistic regression analyses demonstrated that use of an intrauterine device reduced the likelihood of subsequent abortion in both communes. Traditional method use in the rural commune, however, increased women's likelihood of a subsequent abortion. CONCLUSIONS: Contraceptive use in these 2 communes affected abortion more than sociodemographic factors. Traditional method use by rural women is a risk for abortion.

Abortion, Induced↗
PubMed1997

The meaning of RTI in Vietnam--a qualitative study of illness representation: collaboration or self-regulation?

In collaboration with the National Committee for Population and Family Planning, a study was conducted in a rural and urban commune of northern Vietnam to provide community-level information about women's reproductive health and behaviors. Ethnographic and structured interviews were conducted with 32 women. A psychosocial model of health behavior, the Dual Process Model, was applied to provide a theoretical framework for understanding women's interpretations of, and strategies for, coping with symptoms of reproductive tract infections (RTIs). Women were found to interpret and manage RTI symptoms collaboratively with other women. Therefore, women's approach to care seeking was influenced heavily by their peer network and not driven by their method of family planning.

Adaptation, Psychological↗
PubMed1995

Tetanus immunization and prenatal care in developing countries.

OBJECTIVE: We sought to estimate the proportion of women immunized against tetanus while attending prenatal care in the developing countries. METHOD: We computed the ratio of the percentage of births to women immunized against tetanus to the percentage of births to women with prenatal care (TP ratio). A TP ratio is lower than 100% if not every woman attending prenatal care is immunized. We used 1986-1992 Demographic and Health Surveys data from 38 countries. RESULTS: The mean TP ratios were 86% in Africa (n = 23), 79% in Asia (n = 6) and 60% in Latin American and the Caribbean (n = 9). The TP ratio was lower than 75% in 15 countries. Of these, four had a TP ratio lower than 50%. CONCLUSION: In many countries the number of pregnant women immunized against tetanus is lower than the number of women attending prenatal care, suggesting that prenatal services are missing opportunities to immunize attending women.

Developing Countries↗
PubMed1984

Vasodilative effect of hydralazine in awake dogs: the roles of prostaglandins and the sympathetic nervous system.

The relative roles of prostaglandins and the sympathetic nervous system in mediating the hypotensive effects of hydralazine were studied in awake dogs with and without pretreatment with indomethacin, propranolol, and phentolamine. In normal dogs, mean aortic pressure decreased 23 +/- 4 mm Hg after administration of hydralazine (cumulative dose of 0.8 mg/kg). This hypotensive effect of hydralazine was potentiated by phentolamine but was abolished by propranolol. Indomethacin caused a paradoxic pressor response (11 +/- 3 mm Hg) to hydralazine, which also was abolished by addition of phentolamine. Hydralazine produced vasodilation in the coronary, skeletal muscle (quadriceps), splanchnic, and renal circulations in normal dogs. The increase in coronary blood flow was associated with increased cardiac oxygen consumption and narrowed arteriovenous oxygen difference across the heart. Propranolol reduced the increases in cardiac oxygen consumption and coronary blood flow, but only indomethacin abolished the narrowed arteriovenous oxygen difference, suggesting that the increase in coronary blood flow was related to both the increased cardiac oxygen demand and prostaglandin-mediated active coronary vasodilation. The decrease in skeletal muscle vascular resistance after hydralazine was abolished by propranolol. Skeletal muscle vascular resistance actually increased after administration of hydralazine in dogs pretreated with both propranolol and indomethacin. These effects were blocked by the addition of phentolamine. Unlike the normal response, renal and splanchnic vascular resistances increased after administration of hydralazine in dogs pretreated with indomethacin. The splanchnic vasoconstriction was abolished by phentolamine, but the renal vascular change was affected by neither phentolamine nor propranolol. The results indicate that hydralazine does not produce uniform vasodilation in all organs and that the cardiovascular actions of hydralazine involve both prostaglandins and the sympathetic nervous system.

Animals↗
PubMed1983

Evaluation of API microtube GT system for detection of germ tube production by clinically significant yeasts.

A total of 152 fresh consecutive yeast isolates were tested for their ability to produce germ tubes by the API GT system (Analytab products, Plainview, N.Y.) and by a conventional method. The API system was found to be less sensitive than the conventional method. The costs per test by the API system and the conventional method were $0.76 and $0.39, respectively.

Bacteriological Techniques↗