RESUMEN
Clinical hyperthyroidism is found in approximately 5% of women with a hydatidiform mole, as human chorionic gonadotropin secreted by molar tissue is structurally similar to thyroid-stimulating hormone. A hydatidiform mole occasionally presents with a co-existing viable fetus. Surgical evacuation may be indicated for significant hemorrhage or preeclampsia. Perioperative management in the presence of hyperthyroidism may be complicated by a thyroid storm. We report a case of total intravenous anesthesia with propofol and remifentanil, combined with an esmolol infusion, to control sympathetic hyperactivity during surgery.
Asunto(s)
Aborto Inducido , Anestesia Intravenosa/métodos , Mola Hidatiforme/complicaciones , Complicaciones Neoplásicas del Embarazo , Tirotoxicosis/complicaciones , Neoplasias Uterinas/complicaciones , Antagonistas Adrenérgicos beta/uso terapéutico , Adulto , Anestésicos Intravenosos/uso terapéutico , Antihipertensivos/administración & dosificación , Antitiroideos/administración & dosificación , Femenino , Estudios de Seguimiento , Humanos , Mola Hidatiforme/cirugía , Metimazol/administración & dosificación , Piperidinas/uso terapéutico , Embarazo , Propanolaminas/uso terapéutico , Propofol/uso terapéutico , Propranolol/administración & dosificación , Remifentanilo , Pruebas de Función de la Tiroides , Tirotoxicosis/sangre , Tirotoxicosis/tratamiento farmacológico , Neoplasias Uterinas/cirugíaRESUMEN
The present paper proposes a pre-concentration procedure for determination of lead and iron in several samples by flame atomic absorption spectrometry. In it, lead(II) and iron(III) ions are coprecipitated using the violuric acid-copper(II) system as collector. Afterwards, the precipitate is dissolved with 1M HNO3 solution and the metal ions are determined. The optimization step was performed using factorial design involving the variables: pH, violuric acid mass (VA) and copper concentration (Cu). Using the optimized experimental conditions, the proposed procedure allows the determination these metals with detection limits of 0.18 microg L(-1) for iron and 0.16 microg L(-1) for lead. The effects of foreign ions on the pre-concentration procedure were also evaluated and the results demonstrated that this method could be applied for determination of iron and lead in several real samples. The proposed method was successfully applied to the analysis of seawater, urine, mineral water, soil and physiological solution samples. The concentrations of lead and iron achieved in these samples agree well with others data reported in the literature.
RESUMEN
Spitz nevus is most commonly a benign solitary lesion. Agminated or disseminated Spitz nevi represent an uncommon manifestation of this nevus. We report an unusual case of Spitz nevi arising and disseminating during pregnancy.
Asunto(s)
Nevo de Células Epitelioides y Fusiformes/patología , Complicaciones Neoplásicas del Embarazo/patología , Neoplasias Cutáneas/patología , Adolescente , Progresión de la Enfermedad , Femenino , Estudios de Seguimiento , Humanos , Regresión Neoplásica Espontánea , EmbarazoRESUMEN
A magnesium hydroxide coprecipitation technique for determination of Cd, Co, Cu, Mn, Ni in dialysis concentrate is described. The analytes are concentrated from 10 ml of dialysis concentrate into 1 ml of 1 M HNO(3) and subsequently determined by graphite furnace atomic absorption spectrometry. Coprecipitation parameters and matrix effects are discussed. The precision, based on replicate analysis, is around 5% for the analytes, and recovery is quantitative, based on analysis of spiked samples and solutions including matrix components.
