Evaluation of cerebral circulation during retrograde perfusion by laser speckle flowgraphy
نویسندگان
چکیده
Laser speckle flowgraphy (LSFG) is an ophthalmologic equipment that qualitatively detects the blood flow of the optic nerve head, which is known to be related with cerebral microcirculation. LSFG can also measure the mean blur rate, which quantitatively calculates the blood flow. We aimed to assess the utility of LSFG in the evaluation of cerebral perfusion during aortic surgery under hypothermic circulatory arrest with retrograde and antegrade cerebral perfusion. Two patients underwent total arch replacement for aneurysm. The blood flow of the optic nerve head was monitored with LSFG and the mean blur rate value was measured during the surgery. The LSFG could detect the blood flow quantitatively in the optic nerve head during both retrograde and antegrade cerebral perfusion; and the value was correlated with rSO2 value.
منابع مشابه
Laser speckle imaging allows real-time intraoperative blood flow assessment during neurosurgical procedures.
Currently, there is no adequate technique for intraoperative monitoring of cerebral blood flow (CBF). To evaluate laser speckle imaging (LSI) for assessment of relative CBF, LSI was performed in 30 patients who underwent direct surgical revascularization for treatment of arteriosclerotic cerebrovascular disease (ACVD), Moyamoya disease (MMD), or giant aneurysms, and in 8 control patients who un...
متن کاملCharacterization of periinfarct flow transients with laser speckle and Doppler after middle cerebral artery occlusion in the rat.
Little information exists on the role and the characteristics of perfusion changes related to periinfarct depolarization. Our aim was to visualize and monitor periinfarct flow transients (PIFTs) in Sprague-Dawley rats (n = 10) with two different laser methods in a closed-skull model of filament middle cerebral artery occlusion. A laser Doppler probe was placed over the ischemic cortex 5 mm late...
متن کاملRetinal blood flow levels measured by laser speckle flowgraphy in patients who received intravitreal bevacizumab injection for macular edema secondary to central retinal vein occlusion.
PURPOSE To report retinal blood flow levels measured by Laser speckle flowgraphy in three patients after they received an intravitreal bevacizumab injection (IVB) for macular edema secondary to central retinal vein occlusion (CRVO). METHODS Three patients (3 eyes) being treated with IVB (1.25 mg/0.05 mL) for secondary macular edema of CRVO were examined. Laser speckle flowgraphy analyses of t...
متن کاملAlbumin therapy enhances collateral perfusion after laser-induced middle cerebral artery branch occlusion: a laser speckle contrast flow study
Laser speckle contrast (LSC) was used to compare the extent of cortical ischemia in two inbred mouse strains that differed in their degree of collateral circulation, after laser occlusion of the distal middle cerebral artery, and after treatment with 25% albumin (ALB) or saline (control). Sequential LSC images acquired over ∼90 minutes were coaligned, converted to relative flow, and normalized ...
متن کاملFree Flap Blood Flow Evaluated Using Two-Dimensional Laser Speckle Flowgraphy
Objective. We investigated the efficiency of laser speckle flowgraphy for evaluating blood flow in free flaps used for plastic surgery. Methods. We measured blood flow using a visual laser meter capable of providing two-dimensional color graphic representations of flow distribution for a given area using a dynamic laser speckle effect. Using laser speckle flowgraphy, we examined the blood flow ...
متن کامل