ABSTRACT
Tissue injury depends on the extent as well as the intensity of the assault. It would be helpful to develop skin dose indices that are more descriptive of the skin area receiving radiation above a threshold value of potential injury. For monitoring radiation exposure to patients, radiochromic film was placed close to the skin of a patient undergoing cardiac catheterization procedures. With the approval of the Institutional Review Board, films from 36 patients were scanned. Contours were drawn at the increment of 100 cGy in air kerma. Using each contour value as a threshold, the area exceeding this threshold and the average dose within this area were computed. For the four patients who had skin doses exceeding the 200 cGy threshold, the peak entrance doses have a range from 230 cGy to 409 cGy. However, these high radiation exposures were confined to limited skin areas and support the absence of any significant skin injury in these patients. The area exceeding a chosen threshold value and the average dose within the area circumscribed might therefore serve as helpful measures of the assault to the skin. This investigation has demonstrated the technical feasibility of providing such dose indices.
Subject(s)
Cardiac Catheterization/radiation effects , Radiation Monitoring/methods , Skin/radiation effects , Adult , Cardiac Catheterization/adverse effects , Cardiac Catheterization/methods , Dose-Response Relationship, Radiation , Fluoroscopy/adverse effects , Humans , Retrospective StudiesABSTRACT
Se presenta la experiencia de 122 pacientes caracterizados en el Instituto Nacional del Torax de la Paz Bolivia, con los diagnósticos de cardiopatia congenita acianógena ( desde 1980 hasta 1991). Las cardiopatías más frecuentesmente cateterizadas fueron PCA 43,4 porciento, CIA 22 porciento, CIV 20,5 porciento, HAP 5 porciento, EAo 3.3 porciento y CoAo 2,5 porciento. Los pacientes procedieron de 8 departamentos de Bolivia, de La Paz 54 porciento, Oruro 28,7 porciento, Potosi, 7.4 porciento, Sucre 4.1 porciento, Cochabamba 1.6 porciento, Santa Cruz 1.6 porciento, Tarija 1.6 porciento, beni 0.8 porciento.
