Bezold's abscess is a rare complication of acute otitis media, but it should be recognized and aggressively treated. Otolaryngologists must be aware of this diagnosis, and multidisciplinary care ...should be provided as soon as possible.
O uso de aspirina é recomendado como estratégia de prevenção cardiovascular em pacientes com diabete melito. Em decorrência do risco de eventos hemorrágicos e da hipótese de que poderia haver um ...agravamento das complicações microvasculares associado ao uso da aspirina, tem havido importante sub-utilização dessa terapia. Entretanto, está definido que o uso de aspirina não piora a retinopatia diabética e existem evidências de que também não afeta a função renal em doses usuais (150 mg/dia). Por outro lado, pacientes com diabete melito parecem necessitar de doses maiores do agente antiplaquetário, o que sugere que esses indivíduos apresentem a chamada "resistência à aspirina". Os mecanismos dessa resistência ainda não estão completamente esclarecidos, estando provavelmente relacionados à atividade plaquetária intrínseca anormal. Portanto, o emprego de terapêuticas antiplaquetárias alternativas ou a administração de doses maiores de aspirina (150-300 mg/dia) devem ser melhor avaliados em relação a um aumento da eficácia na prevenção da doença cardiovascular e também a possíveis efeitos nas complicações microvasculares no diabete melito.
Aspirin is recommended as cardiovascular disease prevention in patients with diabetes mellitus. Due to the increased risk of bleeding and because of the hypothesis that there could be a worsening of microvascular complications related to aspirin, there has been observed an important underutilization of the drug. However, it is now known that aspirin is not associated with a deleterious effect on diabetic retinopathy and there is evidence indicating that it also does not affect renal function with usual doses (150 mg/d). On the other hand, higher doses may prove necessary, since recent data suggest that diabetic patients present the so called "aspirin resistance". The mechanisms of this resistance are not yet fully understood, being probably related to an abnormal intrinsic platelet activity. The employment of alternative antiplatelet strategies or the administration of higher aspirin doses (150-300 mg/d) should be better evaluated regarding effective cardiovascular disease prevention in diabetes as well as the possible effects on microvascular complications.
O uso de aspirina é recomendado como estratégia de prevenção cardiovascular em pacientes com diabete melito. Em decorrência do risco de eventos hemorrágicos e da hipótese de que poderia haver um ...agravamento das complicações microvasculares associado ao uso da aspirina, tem havido importante sub-utilização dessa terapia. Entretanto, está definido que o uso de aspirina não piora a retinopatia diabética e existem evidências de que também não afeta a função renal em doses usuais (150 mg/dia). Por outro lado, pacientes com diabete melito parecem necessitar de doses maiores do agente antiplaquetário, o que sugere que esses indivíduos apresentem a chamada "resistência à aspirina". Os mecanismos dessa resistência ainda não estão completamente esclarecidos, estando provavelmente relacionados à atividade plaquetária intrínseca anormal. Portanto, o emprego de terapêuticas antiplaquetárias alternativas ou a administração de doses maiores de aspirina (150-300 mg/dia) devem ser melhor avaliados em relação a um aumento da eficácia na prevenção da doença cardiovascular e também a possíveis efeitos nas complicações microvasculares no diabete melito.
Aspirin is recommended as cardiovascular disease prevention in patients with diabetes mellitus. Due to the increased risk of bleeding and because of the hypothesis that there could be a worsening of ...microvascular complications related to aspirin, there has been observed an important underutilization of the drug. However, it is now known that aspirin is not associated with a deleterious effect on diabetic retinopathy and there is evidence indicating that it also does not affect renal function with usual doses (150 mg/d). On the other hand, higher doses may prove necessary, since recent data suggest that diabetic patients present the so called "aspirin resistance". The mechanisms of this resistance are not yet fully understood, being probably related to an abnormal intrinsic platelet activity. The employment of alternative antiplatelet strategies or the administration of higher aspirin doses (150-300 mg/d) should be better evaluated regarding effective cardiovascular disease prevention in diabetes as well as the possible effects on microvascular complications.
Ocular imaging has been heavily incorporated into glaucoma management and provides important information that aids in the detection of disease progression. Longitudinal studies have shown that the ...circumpapillary retinal nerve fiber layer is an important parameter for glaucoma progression detection, whereas other studies have demonstrated that macular parameters, such as the ganglion cell inner plexiform layer and optic nerve head parameters, also are useful for progression detection. The introduction of novel technologies with faster scan speeds, wider scanning fields, higher resolution, and improved tissue penetration has enabled the precise quantification of additional key ocular structures, such as the individual retinal layers, optic nerve head, choroid, and lamina cribrosa. Furthermore, extracting functional information from scans such as blood flow rate and oxygen consumption provides new perspectives on the disease and its progression. These novel methods promise improved detection of glaucoma progression and better insight into the mechanisms of progression that will lead to better targeted treatment options to prevent visual damage and blindness.
To evaluate the associations between retinal blood flow (RBF) and optical coherence tomography (OCT) structural measurements in normal-tension glaucoma (NTG) eyes with single-hemifield visual field ...(VF) damage by the Doppler OCT.
The Doppler OCT was used to measure temporal artery (TA) RBF and temporal vein (TV) RBF. Retinal nerve fibre layer thickness (RNFLT) was measured by spectral-domain OCT.
Forty-three consecutive eyes of 43 patients with NTG with VF defect confined to a single hemifield and 24 eyes of 24 age-matched healthy subjects were studied. TA and TV RBF and RNFLT were reduced in the damaged hemisphere compared with the normal hemisphere (mean (SD), 3.61 (1.68) vs 5.86 (2.59) µL/min, p<0.001; 5.61 (2.51) vs 6.94 (2.83) µL/min, p=0.010; 69.0 (19.7) vs 99.7 (22.8) µm, p<0.001). Those values in the normal hemisphere of NTG eyes also decreased compared with the healthy hemisphere of the healthy eyes (8.40 (3.36) µL/min, p<0.001; 9.28 (4.47) µL/min, p<0.002; 122.8 (20.2) µm, p<0.001). Multivariate model showed that normal and damaged hemispheres and RNFLT were associated with RBF reduction. In addition, the RBF in the normal hemisphere was lower than that in the healthy hemisphere even after adjusting for RNFLT.
In NTG eyes with single-hemifield damage, the RBF was significantly reduced in the damaged hemisphere compared with the normal one. The RBF decreased in the normal and damaged hemispheres of NTG eyes compared with the healthy hemisphere independent from RNFLT.
To determine if inner retinal layer reflectivity in eyes with acute central retinal vein occlusion (CRVO) correlates with visual acuity at 12 months.
Macular optical coherence tomography (OCT) scans ...were obtained from 22 eyes of 22 patients with acute CRVO. Optical intensity ratios (OIRs), defined as the mean OCT reflectivity of the inner retinal layers normalized to the mean reflectivity of the RPE, were measured from the presenting and 1-month OCT image by both manual measurements of grayscale B-scans and custom algorithmic measurement of raw OCT volume data. OIRs were assessed for association with final visual outcome. Cohort subgroup division for analysis was determined statistically.
Eyes with poorer final visual acuity (≥20/70) at 1 year were more likely to have a higher ganglion cell layer OIR than eyes with better final visual acuity (<20/70) at 1 month (manually: 0.591 to 0.735, P = 0.006, algorithmically: 0.663 to 0.799, P = 0.014). At 1 month, eyes with a poorer final visual acuity demonstrated a higher variance of OIR measurements (algorithmically: 0.087 vs. 0.160, P = 0.002) per scan than eyes with better final visual acuity.
In acute CRVO, ganglion cell layer changes at 1 month, including increased reflectivity and increased heterogeneity of reflectivity signal as expressed as OIR and OIR variance, were associated with a poorer visual prognosis at 1 year. Technique calibration with larger sample sizes and automated integration into OCT platforms will be necessary to determine if OIR can be a clinically useful prognostic tool.
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