RESUMEN
Low-intensity laser radiation is characterized by its ability to induce athermic, nondestructive photobiological processes. Although it has been in use for more than 30 years, this phototherapy is still not an established therapeutic modality. We have summarized the main arguments being brought up against the use of this therapy and have reviewed the literature addressing both its in vitro and in vivo effects. We conclude that low-intensity laser irradiations might be of benefit in selected indications if the existing preliminary data can be confirmed by more prospective and well-controlled studies.
Asunto(s)
Terapia por Láser , Animales , Terapia Combinada , Relación Dosis-Respuesta en la Radiación , Humanos , Técnicas In Vitro , Dosificación Radioterapéutica , Enfermedades de la Piel/radioterapia , Enfermedades de la Piel/cirugía , Resultado del Tratamiento , Cicatrización de Heridas/efectos de la radiaciónRESUMEN
BACKGROUND AND PURPOSE: Recent studies have reported the clinical improvement in patients with AIDS treated with a combination of antiretroviral regimens. The purpose of our study was to describe the effects of highly active antiretroviral therapy on MR images in patients with HIV encephalopathy and to compare the clinical course with follow-up neuroimaging studies. METHODS: Initial and follow-up MR imaging findings are described in four patients with AIDS dementia complex at baseline and after antiretroviral therapy, and correlated with clinical and immunologic findings. RESULTS: Initial MR imaging revealed white matter signal abnormalities on long-TR images without mass effect and without enhancement on postcontrast images, consistent with HIV encephalopathy. Lesions were located in the basal ganglia and posterior fossa in two patients. All four patients showed progression of white matter disease on the first follow-up MR scan (mean, 6 months). On subsequent scans, regression was seen in three patients and stabilization of white matter disease was observed in one patient. Increases in CD4+ count and decreases in viral load below the limit of quantification were present in all patients. CONCLUSION: Although our patient population was small, the results suggest that disease regression in patients with AIDS dementia complex after treatment with highly active antiretroviral therapy can be characterized and monitored by MR imaging.
Asunto(s)
Complejo SIDA Demencia/tratamiento farmacológico , Complejo SIDA Demencia/patología , Fármacos Anti-VIH/uso terapéutico , Imagen por Resonancia Magnética , Complejo SIDA Demencia/inmunología , Complejo SIDA Demencia/fisiopatología , Adulto , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana EdadRESUMEN
Radiotherapy can be followed by recalcitrant skin ulcers. As low intensity laser irradiation has been demonstrated to have a beneficial effect on impaired wound healing, we investigated its efficacy and safety in three patients with chronic radiation ulcers. The three patients, previously mastectomized due to breast cancer, with recalcitrant radiation ulcers of the skin were treated with a 30 mW helium-neon laser (wavelength: 632.8 nm, intensity: 3 mW/cm2, dose: 30 J/ cm2) three times weekly. In all patients, complete wound closure was achieved within a period of 7, 5, and 8 weeks. One patient died 6 weeks after laser treatment due to tumor cachexia. Neither of the other patients showed recurrence of radiation ulcers or neoplasm during a follow-up of 36 months. Low intensity helium-neon laser irradiation has been shown to be effective in the induction of wound healing in radiotherapy-induced ulcers in three patients with breast cancer.
Asunto(s)
Neoplasias de la Mama/radioterapia , Terapia por Láser , Traumatismos por Radiación/radioterapia , Úlcera Cutánea/radioterapia , Adulto , Femenino , Humanos , Persona de Mediana Edad , Dosificación Radioterapéutica , Úlcera Cutánea/etiologíaRESUMEN
OBJECTIVE: To evaluate the efficacy of low-intensity laser irradiation for the induction of wound healing of a diabetic neuropathic foot ulcer. CASE: We report a case of a man with insulin-dependent diabetes mellitus, sensory neuropathy, macroangiopathy and microangiopathy who had been suffering from an ulcer of his first left toe accompanied by osteomyelitis for 6 weeks. RESULTS: After a total of 16 sessions of low-intensity laser therapy using a 670-nm diode laser administered within a 4-week period the ulcer healed completely. During a follow-up period of 9 months, there was no recurrence of the ulcer even though the patient's metabolic condition remained unstable. CONCLUSIONS: Although laser therapy was not applied as a monotherapy, the present observation suggests that it might constitute a useful side-effect-free alternative treatment modality for the induction of wound healing of neuropathic ulcers in diabetic patients. Therefore large properly controlled randomized studies seem justified.
Asunto(s)
Pie Diabético/radioterapia , Terapia por Láser , Anciano , Pie Diabético/patología , Humanos , Masculino , Resultado del Tratamiento , Cicatrización de Heridas/efectos de la radiaciónRESUMEN
Post-exposure prevention is a combined modality approach to reducing HIV transmission. The recommendations are based on the risk of local prevalence and on the likelihood of transmission. In the light of the severe consequences of HIV infection, post-exposure prophylaxis after occupational exposure should be recommended. The medication, consisting of a potent antiretroviral combination (two nucleoside analogues and one reverse transcriptase inhibitor), should be available within two hours.