RESUMO
The conjunctiva and nictitating membrane of reptilian eyelids have been studied by means of SEM. The whole surface pattern of the eyelids can be subdivided into the centrally positioned A-zone near the rims and the surrounding B-zone, including the fornix conjunctivae. The A-zone is characterized by the presence of epithelial lamellae or similar arranged cellular protrusions. All conjunctival epithelial cells demonstrate protrusions of extent morphological variety. Numerous goblet-cells occur in the B-zone and progressively increase in density in the direction of the fornix conjunctivae and the epithelial cells exhibit decreasing protrusions. The lower eyelid incorporates the discus conjunctivae, a platelike formation. It consists of dense connective tissue in which the collagen fibres stretch out orthogonally in a plywood-like manner. The nictitating membrane can be considered as a conjunctival fold near the rostral angle of the eyelids. Its bulbar surface folds in a perpendicular direction.
Assuntos
Túnica Conjuntiva/ultraestrutura , Lagartos/anatomia & histologia , Membrana Nictitante/ultraestrutura , Animais , Microscopia Eletrônica de Varredura , Especificidade da EspécieRESUMO
The suitability of Excimer laser beam for microneurosurgery was investigated in an animal experimental study. Cranial bones, cortex and the nervus ischiadicus of the rat were irradiated with 193 nm argon fluoride, 248 nm krypton fluoride, 308 nm xenon chloride and 351 nm xenon fluoride. After survival times of up to 30 days microscopic and electron optic findings of laser lesions at the tissues mentioned above, were studied. By means of the Excimer laser beam high precision tissue effects without or with only low thermal damage to the surrounding tissue were produced with any desired depth of penetration or extension. In analogy with the experiences gathered from animal experiments, a possible use is discussed for the removal of bone tissue around cranial nerves or vascular structures, of epileptogenic foci, or for cutting off pathways in pain surgery (e.g. the zone of entry of the dorsal root of spinal nerves).
Assuntos
Terapia a Laser/instrumentação , Microcirurgia/instrumentação , Neurocirurgia/instrumentação , Animais , Encéfalo/patologia , Encéfalo/cirurgia , Microscopia Eletrônica de Varredura , Ratos , Nervo Isquiático/patologia , Nervo Isquiático/cirurgia , Crânio/patologia , Crânio/cirurgiaRESUMO
In the light of own cases and the present literature the different possibilities of the incorporation of metallic mercury are indicated, the radiological findings explained and the possible consequences of the proof discussed.
Assuntos
Intoxicação por Mercúrio/diagnóstico por imagem , Relação Dose-Resposta a Droga , Embolia/diagnóstico por imagem , Humanos , Mercúrio/administração & dosagem , Pneumonia Aspirativa/diagnóstico por imagem , RadiografiaRESUMO
On the basis of two own cases and the present literature causes, symptoms and forms of the course of the spontaneous extravasation of contrast remedies are described. In the predominant part of the cases a conservative therapy is indicated. In a persisting rupture of the pelvicalyceal system in dependence of the clinical symptomatology an operative approach becomes necessary.
Assuntos
Extravasamento de Materiais Terapêuticos e Diagnósticos/etiologia , Urografia , Adulto , Idoso , Feminino , Humanos , Pielonefrite/diagnóstico por imagem , Cálculos Ureterais/diagnóstico por imagem , Obstrução Ureteral/diagnóstico por imagemRESUMO
The influence of Laser radiation on neuroma formation was investigated in rat sciatic nerves. Peripheral nerve trunks were divided by focused Neodym Yag Laser and compared with those transected by microscissors. The nerves were re-exposed at different time intervals up to 240 days after initial operation. True neuroma formation could not be observed after laser transection. Sharp division resulted in widespread amputation neuromas consisting of regenerating axons and connective tissue. Neodym Yag laser radiation by its scattering effect may cause deep coagulation necrosis and thrombosis of vasa nervorum thus sealing the dome of the divided nerve trunk. The formation of amputation neuromas may be suppressed by laser application.
Assuntos
Cotos de Amputação , Terapia a Laser , Neuroma/prevenção & controle , Animais , Denervação , Microscopia Eletrônica , Microscopia Eletrônica de Varredura , Ratos , Nervo Isquiático/ultraestruturaAssuntos
Doenças do Colo/diagnóstico por imagem , Colostomia , Extravasamento de Materiais Terapêuticos e Diagnósticos/diagnóstico por imagem , Hérnia Ventral/diagnóstico por imagem , Perfuração Intestinal/diagnóstico por imagem , Complicações Pós-Operatórias/diagnóstico por imagem , Neoplasias Retais/cirurgia , Idoso , Sulfato de Bário , Humanos , Masculino , RadiografiaRESUMO
In order to avoid the transition into an irreversible pulmonary fibrosis a diagnosis of the exogenic allergic alveolitis as early as possible is necessary. On the basis of 8 own cases the importance of a correct interpretation of the in detail not specific clinical and radiological symptoms as well as of the with regard to possible inhalative allergen loads directed establishment of the anamnesis is described.
Assuntos
Alveolite Alérgica Extrínseca/diagnóstico por imagem , Adulto , Alérgenos , Alveolite Alérgica Extrínseca/imunologia , Assistência Ambulatorial , Pulmão do Criador de Aves/diagnóstico por imagem , Pulmão do Criador de Aves/imunologia , Diagnóstico Diferencial , Pulmão de Fazendeiro/diagnóstico por imagem , Pulmão de Fazendeiro/imunologia , Feminino , Alemanha Oriental , Hospitalização , Humanos , Masculino , Pessoa de Meia-Idade , Ambulatório Hospitalar , Fibrose Pulmonar/prevenção & controle , RadiografiaRESUMO
The perivelvic extravasation is a rare X-ray symptom in the intravenous urography. Etiologic, diagnostic and therapeutic aspects are discussed on the basis of an own case and the present literature.
Assuntos
Extravasamento de Materiais Terapêuticos e Diagnósticos/etiologia , Cálculos Renais/diagnóstico por imagem , Urografia , Idoso , Diagnóstico Diferencial , Feminino , Humanos , Pelve Renal/diagnóstico por imagem , Ruptura EspontâneaAssuntos
Neoplasias Ósseas/secundário , Carcinoma de Células Renais/secundário , Neoplasias Femorais/secundário , Neoplasias Renais/terapia , Sacro , Neoplasias Ósseas/terapia , Carcinoma de Células Renais/terapia , Terapia Combinada , Neoplasias Femorais/terapia , Fixação Interna de Fraturas , Fraturas Espontâneas/cirurgia , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
On the basis of a case of life-threatening haemorrhage from a postbulbar duodenal ulcer two and a half year after radiotherapy carried out on a non-Hodgkin-lymphoma, cases of the genesis and the diagnostics of this late complication are discussed.