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F H Adams

Publications and source records attributed to F H Adams.

62 records · Page 4Linked to original sources
PubMed1966

Rheumatic fever; summary of a rheumatic fever workshop on various aspects of the disease.

While rheumatic fever is becoming an uncommon disease in all parts of the United States, it still exists in all areas including Southern California. The disease is sufficiently common in Los Angeles County to warrant organized programs of control aimed particularly at careful follow-up, accurate case reporting, secondary prophylaxis and primary prevention.In April of 1965 a Rheumatic Fever Workshop, in which local, national and state experts in rheumatic fever participated, reviewed the status of the rheumatic fever programs in Los Angeles County. Guidelines for future organization for the control of rheumatic fever were developed and presented.

California↗
PubMedDate not supplied

Absorbed dose in the presence of contrast agents during pediatric cardiac catheterization.

Administration of x-ray contrast agents during heart catheterization examination increases the absorbed radiation dose in tissue. To estimate the dose absorbed by the blood of children undergoing diagnostic heart catheterization and angiocardiography, a number of measurements and calculations were conducted. First, entrance and exit exposures to the patient were measured with thermoluminescent dosimeters calibrated for the diagnostic x-ray energy range. Second, a dose enhancement factor was calculated from mass energy absorption coefficients for various concentrations of the contrast media and at selected x-ray energies. Third, the dose enhancement factor was estimated from survival of peripheral blood lymphocytes suspended in varying concentrations of the contrast agent during exposure to graded doses of x-rays. Fourth, a mean absorbed dose to the patient's blood was calculated using (a) the dose enhancement factor determined above, (b) an estimate of the mean exposure in the irradiated body volume calculated from the entrance and exit exposure measurements, (c) an effective iodine concentration in the blood during the exposure time, and (d) a ratio correcting for the distribution and circulation of the blood. For eight pediatric patients monitored, absorbed doses to the blood ranged between 3 and 12 rad. These values were two to three times greater than the expected dose without administration of a contrast agent.

Angiocardiography↗