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Biomedical subjects

S Wynchank

Publications and source records attributed to S Wynchank.

66 records · Page 4Linked to original sources
PubMed1983

Transient intense gastric fixation of 99mTc-MDP.

A case is described of reversible, intense gastric uptake of 99mTc-MDP in the fundal region of a patient with myeloma, while very little transient pulmonary fixation was seen. The significance of this unusual finding in terms of relevant blood chemistry, results of gastric biopsies, which failed to show metastatic calcification, and the drugs administered is discussed.

Aged↗
PubMed1983

Pediatric esophageal scintigraphy. Results of 200 studies.

Esophageal transit of a small volume of watery liquid has been observed scintigraphically in 200 studies performed on patients aged between 6 days and 16 years. Qualitative information concerning esophageal morphology and function in the various phases of deglutition, and scintigraphic features of achalasia, stenosis, and other pathologies are described. Measured esophageal transit time and its normal variation, its relevance to the diagnosis of esophagitis, and the monitoring of treatment are discussed. This technique observing distinct deglutitions has proven a useful diagnostic tool. Its advantages and limitations are discussed in comparison with other methods.

Adolescent↗
PubMed1983

Cerebrospinal shunt flow in adults: radionuclide quantitation with emphasis on patient position.

Radionuclide quantitation of cerebrospinal fluid (CSF) flow through a ventricular shunt using a Cordis-Hakim valve was performed in 78 adults (138 studies). All remained supine for at least two hours before the study to avoid possible depletion of ventricular CSF. The absolute flow rate distinguished shunt adequacy from patency by defining flow of less than 0.1 ml/min. as abnormal. Measurements were performed with the patient first supine and then erect. When abnormal supine flow was the criterion of malfunction, all obstructions were detected but there were 6 false positives. When abnormal erect flow was considered, there were 5 false negatives. Abnormal flow in both supine and erect positions is a reliable indication of malfunction. The authors conclude that this technique is valuable for neurosurgical management of ventricular shunts.

Adolescent↗
PubMed1982

Radionuclide exercise ventriculography and levels of workload.

The wealth of useful information made available from the utilization of radionuclide cardiological investigations by non-invasive means is outlined and reasons for investigating results obtained under conditions of increased heart workload are explained. The lack of an accepted protocol for the determination of exercise levels is noted. A format for obtaining increasing heart loads dependent on increasing pulse rate is offered, with justification. Exercise radionuclide ventriculography examinations can be conducted which are simple, reproducible and allow appropriate levels of stress in patients who can benefit from such investigations.

Adult↗
PubMed1980

Adolescence in Cape Town.

A questionnaire answered by adolescents in two very dissimilar suburbs of Cape Town and its results are described. Adolescent attitudes were independent of race and family income, but varied with age and sex. Respondents fell into two main groups, the exploratory majority who questioned society, wanted to make changes of varying degrees and sought new experiences, and about a quarter who were cautious and had more traditional values. More girls than boys were exploratory. The relation between these findings and present understanding of the function and stresses of adolescence is described.

Adolescent↗
PubMed1977

Rubella--a reappraisal.

Rubella infection is reviewed and new information about congenital infection, possible sources of infection in pregnant women and the optimum ages and population groups for rubella vaccination is considered. Investigations required to confirm a suspected and possibly 'silent' infection during pregnancy are outlined.

Adolescent↗
PubMed1977

The epidemiology of rubella in Cape Town.

This preliminary study indicates that a high proportion of adult females in Cape Town are immune to rubella, and that, unlike the situation in the UK, natural rubella infections are common before 4 years of age. At least 10 children with the congenital rubella syndrome have been seen in the Cape Town group of teaching hospitals in a 5 1/2-year period since October 1971. Continuous serological surveillance is essential in order to implement the most effective programme of immunization in any particular area and also to be able to determine whether the vaccine is successfully preventing the birth of children with congenital rubella infection.

Adolescent↗
PubMed1976

Sources of fast neutrons for radiotherapy.

There is currently great interest in the use of fast neutrons for radiotherapy. Although it is too early for the long-term effects to be known, the results so far are encouraging. Three types of fast neutron-producing devices are available: neutron generators, compact cyclotrons and large cyclotrons. For the requirements of radiotherapists the most suitable and practical source currently available is the reaction 9Be(d,n) in conjunction with a large cyclotron capable of accelerating deuterons to energies greater than 35 MeV.

Beryllium↗
PubMedDate not supplied

Tele-cardiology.

After defining tele-medicine, we describe its situation in the public health service of South Africa and its application to cardiology. Methods of communication relevant to tele-cardiology are outlined, together with their bearing on primary healthcare. The range of tele-cardiological applications to electrocardiology, echocardiology, auscultation, imaging and pathology are indicated. Tele-cardiology's contributions to a range of cardiological problems and types of management are described briefly. Finally, a mention is made of the relevance of tele-medicine to education and the costs related to cardiology, with an indication of some future needs for tele-cardiology.

Cardiology↗