RESUMEN
The author revisits an old technique of shortening of the upper lip. He shows the interest of systematically analyzing the length of the upper lip in any consultation of face and especially of rejuvenation. He develops indications based on the visibility of the upper incisors at the half-open mouth rest. He details the technique and shows results.
Asunto(s)
Labio/cirugía , Ritidoplastia , HumanosRESUMEN
Cancer of the thyroid has been detected as a late consequence of irradiation mainly for benign diseases. A survey of data from several investigators shows a strong correlation between incidence and thyroid dose. The result of a risk estimation for irradiated children assuming a linear non-threshold dose response is 60 cancers per 10(6) per rem in 20 years following irradiation. There is no evidence that adults will be much less sensitive. Radiation risks for the thyroid should be considered in nuclear medicine, because the diagnostic use of radioiodine leads to organ doses which are comparably high.
Asunto(s)
Neoplasias Inducidas por Radiación/diagnóstico , Neoplasias de la Tiroides/etiología , Humanos , Radioisótopos de Yodo/efectos adversos , Dosis de Radiación , Radiografía/efectos adversos , Cintigrafía/efectos adversos , Riesgo , Enfermedades de la Tiroides/diagnóstico por imagen , Pruebas de Función de la Tiroides , Neoplasias de la Tiroides/diagnósticoRESUMEN
Non-invasive measurement of organ blood flow can be achieved by tracing the elimination patterns of 133Xe administered by inhalation. An adaption of the method for the estimation of renal blood flow was developed. The 133Xe is accumulated in the tissue by re-breathing for 1 min and the time course of its washout from the kidney is followed for 14 min thereafter. Normal values were determined in ten dogs and forty-five healthy human volunteers. In man they were similar to results obtained with 131I-hippuran clearance. When flow rates were between 250 and 600 ml/100 g/min the correlation coefficient was 0.84. Only in cases with high cortex flow rates (greater than 600 ml/100 g/min) did the inhalation method give values higher than those determined by the 131I-hippuran clearance. In dogs the results closely correlated with results obtained by direct intra arterial xenon injection (r = 0.96). The value of the inhalation method in routine examination of patients with kidney transplants and its suitability for the early detection of ongoing rejection is demonstrated.
