ABSTRACT
Public concern for the compatibility of electromagnetic (EM) sources with active implantable medical devices (AIMD) has prompted the development of new systems that can perform accurate exposure studies. EM field interference with active cardiac implants (e.g. implantable cardioverter-defibrillators (ICDs)) can be critical. This paper describes a magnetic field (MF) exposure system and the method developed for testing the immunity of ICD to continuous-wave MFs. The MFs were created by Helmholtz coils, housed in a Faraday cage. The coils were able to produce highly uniform MFs up to 4000 µT at 50 Hz and 3900 µT at 60 Hz, within the test space. Four ICDs were tested. No dysfunctions were found in the generated MFs. These results confirm that the tested ICDs were immune to low frequency MFs.
Subject(s)
Defibrillators, Implantable , Magnetic Fields , Materials Testing/methods , Environment , Equipment Design , Materials Testing/instrumentationABSTRACT
This paper presents the design of a four electrode impedance measurement circuit dedicated to bioimpedance embedded applications. It extends the use of the AD5933 measurement chip to allow it to operate in a four electrode configuration in order to limit the effects of the parasitic impedances between the medium under test and the electrodes. The circuit has shown a good measurement accuracy on various test circuits. In association with a four microband electrode system it has been successfully used to characterize small physiological samples (50 µl) with conductivities ranging from 0.14 to 1.2 S m(-1). It can be used as an alternative bioimpedance measurement approach for embedded applications operating in the four electrode configuration.
Subject(s)
Dielectric Spectroscopy/methods , Electronics/instrumentation , Calibration , Electricity , Electrodes , Ions , SolutionsSubject(s)
Skin Diseases/epidemiology , Adolescent , Adult , Aged , Child , Child, Preschool , Ethiopia , Facial Dermatoses/chemically induced , Female , Humans , Male , Middle Aged , Pigmentation Disorders/epidemiology , Prospective StudiesSubject(s)
Disease Outbreaks/epidemiology , Larva Migrans/epidemiology , Adolescent , Adult , Animals , Cats , Child , Child, Preschool , Combined Modality Therapy , Cuba , Dogs , Female , Humans , Infant , Infant, Newborn , Larva Migrans/therapy , Larva Migrans/transmission , Male , Play and Playthings , Schools, NurseryABSTRACT
Se exponen los hallazgos clinicos y epidemiologicos obtenidos de un brote de 26 casos de larva migrans cutanea en cuatro circulos infantiles de la antigua regional de salud San Jose-Camilo Cienfuegos.Se senalan los resultados obtenidos con diferentes metodos terapeuticos que se utilizaron en los pacientes afectados. Se recomiendan medidas para la prevención de futuros brotes
Subject(s)
Disease Outbreaks , Larva Migrans , CubaABSTRACT
Se presenta un caso de síndrome de Rothmund-Thomson, el cual resulta de interés por lo florido del cuadro clínico en este paciente y por la rareza de esta afección, ya que hasta el presente sólo existen informes de más o menos 25 casos en la literatura médica mundial. Se revisa la bibliografía al respecto y se expone el cuadro clínico característico, así como la frecuencia con que se presentan las alteraciones fundamentales(AU)
Subject(s)
INFORME DE CASO , Humans , Male , Adolescent , Rothmund-Thomson SyndromeABSTRACT
Se presentan siete pacientes afectados de amiloidosis cutánea primitiva localizada, con breve revisión de la bibliografía actual. Se recomienda la radioterapia superficial para el alivio rápido de la sintomatología, debiendo continuarse con el empleo de ungüento corticoesteroideos. Se recomienda frente a una lesión pruriginosa, pigmentada de alguna evolución pensar en el amiloidosis cutánea localizada. Se piensa que esta dermatosis no es tan rara en el consultorio Dermatológico y sí a veces olvidada(AU)