Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 3 de 3
Filtrar
Mais filtros











Base de dados
Intervalo de ano de publicação
1.
Ear Nose Throat J ; 76(2): 95-101, 1997 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-9046697

RESUMO

Two cases of biopsy-proven Microsporidium-associated chronic sinusitis in HIV-seropositive patients are presented. Spores of Septata intestinalis were identified by light microscopy and confirmed by electron microscopy in each case. Both patients displayed severe deficiencies of nasal mucosa CD4-positive cells, demonstrated by immunohistochemical methods. Only two other cases of Septata intestinalis-associated sinusitis have been reported previously. Our observations agree with the theory that functional defects in local mucosal immunity may partially explain the acquisition of opportunistic mucosal infections in many HIV-seropositive patients.


Assuntos
Infecções Oportunistas Relacionadas com a AIDS/parasitologia , Microsporida/isolamento & purificação , Microsporidiose/diagnóstico , Sinusite/parasitologia , Infecções Oportunistas Relacionadas com a AIDS/diagnóstico , Adulto , Animais , Biópsia , Evolução Fatal , Soropositividade para HIV/complicações , Humanos , Hospedeiro Imunocomprometido , Imuno-Histoquímica , Masculino , Microsporidiose/imunologia , Mucosa Nasal/parasitologia , Mucosa Nasal/patologia , Sinusite/diagnóstico , Sinusite/imunologia , Tomografia Computadorizada por Raios X
2.
Clin Infect Dis ; 21(4): 852-8, 1995 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-8645829

RESUMO

The etiologic and clinical features of cholecystisis in infection due to human immunodeficiency virus (HIV) were studies retrospectively. The charts and histopathologic specimens of 136 HIV-infected patients who underwent cholecystectomy between February 1987 and May 1993 at a large tertiary care center were reviewed. Opportunistic pathogens infecting the 107 patients with AIDS included microsporidia (eight cases-- Enterocytozoon bieneusi in six and Septata intestinalis in two); cytomegalovirus alone (six cases); Cryptosporidium alone (eight cases); cytomegalovirus plus Cryptosporidum (15 cases); and Pneumocystis carinii and Isospora belli (one case each). In addition, histopathologic changes characteristic of Kaposi's sarcoma were seen in one case. Thirty-eight patients with AIDS had acalculous cholecystitis for which no etiologic agent was found. Twenty-eight AIDS patients had cholelithiasis, six with coexistent opportunistic gallbladder infection. In the 107 AIDS patients, no specific symptom was found to be predictive of opportunistic infection of the gallbladder, but such infection was significantly associated with an abnormal abdominal ultrasound (P = .017) and with nonvisualization of the gallbladder by radionucleotide biliary scan (P < .001).


Assuntos
Infecções Oportunistas Relacionadas com a AIDS/etiologia , Doenças Biliares/etiologia , Colecistectomia , Colecistite/etiologia , Infecções Oportunistas Relacionadas com a AIDS/patologia , Adulto , Doenças Biliares/patologia , Doenças Biliares/cirurgia , Colecistite/patologia , Colecistite/cirurgia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
3.
J Neurosurg ; 67(5): 726-31, 1987 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-3668643

RESUMO

Drug streaming has been implicated in the development of focal necrotic lesions in perfused tissues following intracarotid chemotherapy of brain tumors at low infusion rates. The narrow infusate path characteristic of streaming within laminar blood flow is not observed at high infusion rates such as are typical in contrast injection for angiography. By periodically pulsing the infusate at a high rate, the mechanisms of rapid mixing can be exploited while retaining the practicality of low average infusion rates. This in vitro study demonstrates the effects of the pulse-controlling parameters and the catheter characteristics and placement on mixing effectiveness. An internal carotid artery model including eight cerebral branches was infused with dye through various indwelling catheters, and individual branch effluents were collected and analyzed spectrophotometrically for dye concentration. While catheter placement dominates the factors that control infusate distribution, judicious selection of the pulse parameters can alleviate that dependence. A primary advantage is gained by phasing the pulse to occur during that period of the cardiac cycle when the blood flow is lowest at the injection site. The data clearly showed that diastole-phased pulsed infusions are highly effective in producing a uniform infusate distribution at low average infusion rates.


Assuntos
Artérias Carótidas , Bombas de Infusão , Infusões Intra-Arteriais , Cateterismo , Cateteres de Demora , Corantes , Diástole , Humanos , Modelos Cardiovasculares , Fluxo Pulsátil
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA