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At least 415 records · Page 23Linked to original sources
PubMed1999

A dynamic phantom for radionuclide renography.

The aim of the study was to develop and test a dynamic phantom simulating radionuclide renography. The phantom consisted of five partly lead covered plastic containers simulating kidneys, heart, bladder and background (soft tissues, liver and spleen). Dynamics were performed with multiple movable steel plates between containers and a gamma camera. Control of the plates is performed manually with a stopwatch following exact time schedules. The containers were filled with activities (99mTc) which produce count rates close to clinical situations. Count rates produced by the phantom were compared with ten clinical renography cases: five 99mTc MAG3 and five 99mTc DTPA examinations. Two phantom simulations were repeated three times with separate fillings, acquisitions and analyses. Precision errors as a coefficient of variation (CV) of repeated measurements were calculated and theoretical values were compared with the corresponding measured ones. A multicentre comparison was made between 19 nuclear medicine laboratories and three clinical cases were simulated with the phantom. Correlations between count rates produced by the phantom and clinical studies were r = 0.964 for 99mTc MAG3 (p < 0.001) and 0.961 for 99mTc DTPA (p < 0.001). The precision error was 4.5 +/- 3.2% and the percentage difference between theoretical and measured values for Tmax was 4.0 +/- 1.6%. Images and curves of the scanned phantom were close to a real patient in all 19 laboratories but calculated parameters varied: the difference between theoretical and measured values for Tmax was 6.8 +/- 6.2%. The difference between laboratories is most probably due to variations in acquisition protocols and analysis programs: 19 laboratories with 18 different protocols and 8 different programs. The dynamics were found to be repeatable and suitable for calibration purposes for radionuclide renography programs and protocols as well as for multicentre comparisons.

Finland↗
PubMed1984

Demography of the Juang tribal population of Orissa.

Demographic analysis of genealogical data collected in 1954 for 23 Juang villages was undertaken employing indirect estimation techniques and computer projection methodology. Results indicated that this group did not feature the historically high fertility levels associated with Indian tribal groups, although fertility was higher than previously reported for the Juang. The population did feature a mortality differential, with worse mortality conditions than the Indian national population at this time. Reversed sexual mortality differentials, common in South Asian populations, were also present for the Juang. Computer projection investigation revealed a steadily growing population, in contrast to some Indian tribal groups faced with extinction.

Adolescent↗
PubMed1985

Recent changes in the sociodemographic profile of sterilization acceptors in Nepal.

The records of 8056 Nepalese males and 9291 females sterilized from 1979-1983 were analyzed. Compared with data from previous studies (1970-1976), significant decreases occurred in the average age of female acceptors (30.6 vs. 33.1, P less than 0.01) and wives of male acceptors (28.4 vs. 31.7, P less than 0.01). Also, the average number of living children per couple decreased by one child (4.9-3.9, P less than 0.01) for male acceptors and 0.6 (4.8-4.2, P less than 0.01) for female acceptors. Finally in 83.2% of the cases, the operation was performed within 3 years of the last delivery.

Adult↗
PubMedDate not supplied

Evaluating the impact of a theory-based sexuality and contraceptive education program.

A controlled field study involving 1,444 adolescent males and females 13-19 years of age was performed to compare a sexuality education program based on the health belief model and social learning theory with several publicly funded community-based and school-based interventions. Among males who had never had intercourse prior to participating in the study, those in the experimental program were more likely than those in the comparison programs to maintain abstinence over the next year; there was no program effect, however, among females. Among female adolescents who initiated intercourse after the start of the study, attendees of the comparison programs were more likely to have used an effective contraceptive at most recent intercourse and to have used an effective method more consistently than were those who attended the experimental program; no such association was seen among comparable young men. Both experimental and comparison programs significantly increased the consistent use of effective methods among teenagers who had been coitally active before attending the programs. Among males, however, when preintervention contraceptive efficiency was held constant, the experimental program led to significantly greater contraceptive efficiency during the follow-up year than did the comparison programs; among females, the two approaches produced an equivalent degree of improvement. Finally, prior exposure to sexuality education was associated with greater contraceptive efficiency at the one-year follow-up among almost all sexual-experience and gender groups, regardless of the type of intervention program attended.

Adolescent↗
PubMedDate not supplied

Ethnic differences in contraceptive use in Sri Lanka.

In Sri Lanka in 1975, the majority Sinhalese had a much higher use of contraception than either the Sri Lanka Tamils or the Moors. This study uses a national sample of women of childbearing age gathered by the Sri Lanka World Fertility Survey in 1975 to assess four possible reasons for differential contraceptive use: (1) differences in socioeconomic position; (2) cultural differences; (3) minority status; and (4) differential access to family planning services. The first three explanations focus on differences in the demand for contraception while the fourth explanation focuses on differences in the availability of contraceptives. The socioeconomic, cultural, and minority status hypotheses fail to explain the higher contraceptive use among the Sinhalese. The evidence is consistent with the idea that ethnic differences in contraceptive use were largely caused by differential access to family planning services.

Adult↗
PubMed1997

CONV--convolution for responses to a finite diameter photon beam incident on multi-layered tissues.

A convolution program (CONV) solving responses to a collimated finite diameter photon beam perpendicularly incident on a multi-layered tissue has been coded in ANSI Standard C, hence, the program can be executed on various computers. The program, employing an extended trapezoidal rule for integration, convolves the responses to an infinitely narrow photon beam computed by a companion program (MCML). Dynamic data allocation is used for CONV as well as MCML, therefore, the number of tissue layers and grid elements of the grid system can be varied at run time. The potential error due to not scoring the first photon-tissue interactions separately is illustrated. The program, including the source code, has been in the public domain since 1992 and can be downloaded from the web site at http:(/)/biomed.tamu.edu/-lw.

Computer Simulation↗
PubMedDate not supplied

The correlation between family planning program inputs and contraceptive use in Indonesia.

Using 1980 Census and 1986 service statistics program inputs, this paper evaluates the net correlation of socioeconomic, region, and program variables with 1987 contraceptive prevalence and method-specific use rates for Indonesian regencies and municipalities. The region variables--primarily, though not exclusively, reflecting program design and maturity--correlate most strongly with the contraceptive prevalence rates. Field-worker activities, field-worker supervisor activities, and community-based distributors also have a correlation with these rates. Pill use is highest in the areas that are predominantly Islamic and least developed, whereas the pattern is reversed for use of the IUD, condom, and other modern methods (mainly female sterilization). The findings are assessed in terms of their implications for policymaking.

Community Health Services↗
PubMed1992

Teenage conception and contraception in the English regions.

Nationally available data on teenage fertility, family planning care and mortality were analysed to determine the relationship between teenage conception, availability of abortion and family planning care, and an indicator of socioeconomic disadvantage--the Standardized Mortality Ratio (SMR). In the 14 regions of England the strongest correlate of teenage conception and of the proportion of teenage conceptions aborted was female all-causes SMR. High levels of provision of NHS abortion services and uptake of family planning clinic care did not significantly reduce teenage fertility. Provision of traditional family planning services obviously plays an important role in preventing teenage pregnancy, but innovation in this service coupled with a concerted effort to reduce social disadvantage might have a greater impact on teenage fertility in England.

Abortion, Induced↗
PubMedDate not supplied

Breastfeeding practices in Indonesia.

UNLABELLED: Breastfeeding promotion program was started by the paediatricians and others in 1977, and is becoming a strong activity since 1990 it was declared by the President of the Republic of Indonesia as a National Movement. One year later the First Lady stated the importance of every Indonesian mother to breast-feed her baby, and thereafter many hospitals created the so called "Baby Friendly Hospital". In this occasion we only limit with eminent topics, i.e., "Exclusive Breast-feeding" in Indonesia, and "Breastfeeding amongst Working Mothers." In fact, until now the percentage of mothers who breastfeed exclusively is very low. Although the ever breastfed babies in Indonesia is 97% (Kodyat, 1996) but the data of the "Exclusive Breastfeeding" of Indonesia is just like Pakistan and Thailand, i.e. nearly 2 months, whereas the Philippines and Ceylon showed a figure of 4 months, and India 5 months. The Home Health Survey (SKRT) data in 1992 showed that 63.7% of the babies were exclusively breast-fed until 3 months. Three quarter of the quality of the exclusive breastmilk is quite good, enough or excellent, whereas the other one quarter is poor and this should be interfered by increasing the quality of the breastmilk and/or adding other formula, to prevent the baby of getting "failure to thrive" (Suharyono, 1996). Working mothers use to do "Early Weaning Practices" with very high mixed feeding practices (Matulessy et al, 1996). Mothers have to go to work because they have to support their family income, but unfortunately most of them ignore their main task of care their children. IN CONCLUSION: the experience in Indonesia proves that a very hard work should still be continued on the effort of promoting breastfeeding, especially regarding the two issues, i.e. "Exclusive breastfeeding" (we do hope at least until 4 months) and the other issue is regarding the "Working Mothers".

Breast Feeding↗
PubMed1992

Newborn screening: the miracle and the challenge.

Modern newborn screening programs are coordinated multi-disorder systems for prevention of infant death and disability, which include statewide infant screening, rapid retrieval, early intervention, and long-term follow-up. Screening programs are dynamic, with new tests being evaluated and added. Because nurses are actively involved in all phases of newborn screening, they must be knowledgeable about each disorder and changing screening requirements. This article reviews basic defects, genetics, incidence, symptoms, treatment, and specific newborn screening requirements for the eight disorders most widely incorporated into statewide newborn screening programs, and discusses practical nursing interventions.

Anemia, Sickle Cell↗
PubMedDate not supplied

The effectiveness of family planning clinics in serving adolescents.

Data from surveys conducted by The Alan Guttmacher Institute (AGI) in 1981 have been used to create three indicators of the effectiveness of family planning clinics in serving teenagers: the mean delay between first intercourse and first clinic visit (which for teenage clinic patients is 13.2 months); teenage patient retention (67 percent; and the average excess of patient satisfaction over dissatisfaction with clinic policies and services (33 percent). Clinics run by Planned Parenthood are more effective than other types of facility, according to the mean delay indicator, whereas other clinics, such as those associated with community action programs and neighborhood health centers, rank highest in levels of patient satisfaction and patient retention. All three measures indicate that clinics serving 1,000-2,499 family planning patients per year are more effective in serving teenagers than either smaller or larger clinics, and that nonmetropolitan clinics are more effective in providing services than those in cities. Regression analysis shows that clinic administrators might take a number of actions to shorten the mean delay among teenagers between first intercourse and first clinic visit. These include offering community education programs for teenagers, enlisting the support of local churches, developing relationships with local youth groups, opening the clinic during evenings and weekends, accepting more teenagers as walk-in patients and locating a clinic in or near neighborhoods where many teenagers live. Two of the same factors--developing an active relationship with youth groups and opening the clinic to teenagers on evenings and weekends--were also found to be particularly effective in keeping teenagers as clinic patients.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMedDate not supplied

Effects of exercise training on aerobic fitness in children after open heart surgery.

Graded treadmill tests to maximal exercise were given to 24 children 1 year or more after open-heart surgery and to 26 age- and sex-matched controls, before and after 9 weeks of exercise training to test whether or not they could increase their aerobic fitness levels. The corrected cardiac lesions included tetralogy of Fallot, aortic stenosis, transposition of the great arteries and atrioventricular canal (AVC). Maximal exercise variables measured were heart rate (HR), oxygen consumption (VO2), and workload (stage of exercise and time on treadmill). The results of the pretraining tests indicated that the fitness levels of the 24 patients were significantly less than those of the controls. Of the original groups, 9 controls and 12 patients satisfactorily completed the training (jogging) program. The results of the post-training tests indicated that both the patients and controls significantly improved their fitness levels. Specifically, most subjects improved their maximal workload with little or no increase in maximal HR or VO2. In conclusion, children after open-heart surgery for complex congenital heart disease can further improve their work capacity by a dynamic exercise program. After training, they are able to do more work at a given VO2.

Adolescent↗