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1.
Rev. argent. radiol ; 77(3): 0-0, set. 2013. ilus
Artigo em Espanhol | LILACS | ID: lil-694926

RESUMO

Objetivo: El objetivo de este trabajo es demostrar la utilidad de las técnicas de tensor de difusión de alta densidad (DTI 32 direcciones) para visualizar el trayecto de los pares craneales antes de la cirugía en pacientes con patología tumoral de la base del cráneo. Materiales y métodos: Se estudiaron 26 pacientes con patología tumoral de la base del cráneo con secuencias de tensor de difusión de alta densidad. Los resultados imagenológicos fueron correlacionados con los hallazgos intraoperatorios. Resultados: En todos los pacientes estudiados fue posible la identificación prequirúrgica del recorrido de los nervios involucrados por las lesiones de la base del cráneo y también hubo una correlación entre los datos obtenidos mediante las imágenes y los hallazgos intraoperatorios. Conclusión: La visualización del recorrido de los nervios craneales mediante la difusión de alta densidad demostró ser segura y reproducible para identificar los pares y su recorrido...


Objective: The objective of this work is to demonstrate the usefulness of high density diffusion tensor imaging techniques (HD-DTI 32 directions), to visualize the course of the cranial nerves prior to surgery in patients with skull base tumor disease.Materials and methods: Twenty-six patients with skull base tumor disease were studied with sequences of high density diffusion tensor imaging. The imaging results were correlated with the intra-operative fi ndings.Results: Pre-surgical identifi cation of the course of the nerves affected by the injuries of the skull base was possible in all the studied patients, with the imaging results correlating with the intraoperative fi ndings.Conclusion: The visualization of the course of the cranial nerves with high density diffusion tensor imaging was shown to be safe and reproducible for the identifi cation of cranial nerves and their course...


Assuntos
Humanos , Masculino , Feminino , Nervos Cranianos , Neoplasias da Base do Crânio/complicações , Neoplasias da Base do Crânio , Imagem de Tensor de Difusão , Imageamento por Ressonância Magnética
2.
Rev. argent. radiol ; 77(3): 0-0, set. 2013. ilus
Artigo em Espanhol | BINACIS | ID: bin-130673

RESUMO

Objetivo: El objetivo de este trabajo es demostrar la utilidad de las técnicas de tensor de difusión de alta densidad (DTI 32 direcciones) para visualizar el trayecto de los pares craneales antes de la cirugía en pacientes con patología tumoral de la base del cráneo. Materiales y métodos: Se estudiaron 26 pacientes con patología tumoral de la base del cráneo con secuencias de tensor de difusión de alta densidad. Los resultados imagenológicos fueron correlacionados con los hallazgos intraoperatorios. Resultados: En todos los pacientes estudiados fue posible la identificación prequirúrgica del recorrido de los nervios involucrados por las lesiones de la base del cráneo y también hubo una correlación entre los datos obtenidos mediante las imágenes y los hallazgos intraoperatorios. Conclusión: La visualización del recorrido de los nervios craneales mediante la difusión de alta densidad demostró ser segura y reproducible para identificar los pares y su recorrido.(AU)


Objective: The objective of this work is to demonstrate the usefulness of high density diffusion tensor imaging techniques (HD-DTI 32 directions), to visualize the course of the cranial nerves prior to surgery in patients with skull base tumor disease. Materials and methods: Twenty-six patients with skull base tumor disease were studied with sequences of high density diffusion tensor imaging. The imaging results were correlated with the intra-operative fi ndings. Results: Pre-surgical identifi cation of the course of the nerves affected by the injuries of the skull base was possible in all the studied patients, with the imaging results correlating with the intraoperative fi ndings. Conclusion: The visualization of the course of the cranial nerves with high density diffusion tensor imaging was shown to be safe and reproducible for the identifi cation of cranial nerves and their course.(AU)

4.
Acta Diabetol Lat ; 21(3): 257-62, 1984.
Artigo em Inglês | MEDLINE | ID: mdl-6516692

RESUMO

Plasma volume and red cell volume were measured in 24 diabetic outpatients. From the blood volume measurements, the whole body hematocrit was derived, and the ratio between whole body hematocrit:venous hematocrit (WBH:VH ratio) was considered to represent an index of the difference in red cell distribution between small and large blood vessels. The WBH:VH ratio was increased in 9 out of 13 males and in 1 out of 11 females, being inversely correlated to the plasma volume (r = -0.51, p less than 0.001). Although the significance of these findings is far from clear, the occurrence of small vessel hemoconcentration in male patients with diabetes mellitus may be relevant to the pathophysiology of vascular complications of diabetes.


Assuntos
Diabetes Mellitus/fisiopatologia , Angiopatias Diabéticas/diagnóstico , Hematócrito , Angiopatias Diabéticas/fisiopatologia , Volume de Eritrócitos , Humanos , Volume Plasmático
5.
Arch Toxicol Suppl ; 7: 298-302, 1984.
Artigo em Inglês | MEDLINE | ID: mdl-6595996

RESUMO

The effects of erythromycin estolate, a well known hepatotoxic macrolide antibiotic, on isolated rat hepatocyte viability and on subcellular Ca2+ transport have been investigated. Erythromycin estolate (0.5 mM), but not erythromycin base and erythromycin ethylsuccinate, induced 100% cell death after 60 min incubation, and caused maximal inhibition of mitochondrial and microsomal Ca2+ sequestration activities at 0.1 mM concentration. Sodium lauryl sulphate, which is the surfactant moiety of the erythromycin estolate molecule, caused effects similar to those exhibited by erythromycin estolate. Disorders of the intracellular calcium homeostasis seem to play a role in the lauryl sulphate-mediated hepatotoxic action of erythromycin estolate.


Assuntos
Cálcio/metabolismo , Doença Hepática Induzida por Substâncias e Drogas/metabolismo , Estolato de Eritromicina/toxicidade , Eritromicina/análogos & derivados , Microssomos Hepáticos/metabolismo , Mitocôndrias Hepáticas/metabolismo , Animais , Homeostase/efeitos dos fármacos , Técnicas In Vitro , Masculino , Ratos , Ratos Endogâmicos
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