SctO 2 is higher if the saturated arterial blood is more and/or the desaturated venous blood is less, and vice versa. The first is the proportional volumes of the arterial, venous and capillary blood in the brain region illuminated by cerebral oximetry. As a result, SctO 2 is determined by two physiological considerations. Different to pulse oximetry which monitors arterial blood hemoglobin saturation (SpO 2), cerebral oximetry monitors hemoglobin saturation in mixed arterial, venous, and capillary blood in cerebral tissue (SctO 2). The first question asks if what cerebral oximetry monitors qualifies as essential physiology. Question 1: Does cerebral oximetry monitor essential and important physiology? In this review, we examine if cerebral oximetry meets these qualifications. The third is that it improves outcome based on monitoring and optimization of the physiology. The second is that it facilitates the optimization of that essential physiology. The first is that it monitors an essential or important aspect of physiology. 1 Philosophically, the following three sequential qualifications characterize any monitor as being desirable ( Fig. The technology itself and the status of its clinical application have been recently reviewed. Palabras clave: Oximetría cerebral, Fisiología esencial, Optimización de la fisiología, Mejora resultados.Ĭerebral oximetry based on near-infrared spectroscopy (NIRS) is a non-invasive, easy-to-use and still evolving monitoring modality. En esta revisión presentamos nuestras respuestas a estas 3 preguntas. La tercera es si se puede mejorar el desenlace mediante una intervención clínica basada en la oximetría cerebral. La segunda es si se puede optimizar la fisiología con base en este monitor. La primera es si la oximetría cerebral monitorea un aspecto importante de la fisiología. A fin de determinar si este monitor es deseable en la clínica, es preciso responder 3 preguntas, en su orden. La oximetría cerebral basada en la espectroscopia cercana al infrarrojo puede medir demanera no invasiva la saturación de oxígeno de la hemoglobina en la sangre mixta arterial, venosa y capilar en el cerebro. Keywords: Cerebral oximetry, Essential physiology, Physiology optimization, Outcome improvement. In this review, we share our answers to these three questions. The third question is if the outcome can be improved based on cerebral oximetry-guided clinical care. The second question is if the physiology can be optimized based on this monitor. The first question is if cerebral oximetry monitors an important aspect of physiology. In order to determine if this is a clinically desirable monitor, we need to answer three questions in order. Received 5 February 2014 Accepted 16 June 2014 Available online 1 August 2014Ībstract Cerebral oximetry based on near-infrared spectroscopy can non-invasively measure hemoglobin oxygen saturation in mixed arterial, venous and capillary blood in the brain. ** Corresponding author at: Department of Anesthesia and Perioperative Care, University of California San Francisco, 521 Parnassus Avenue, Suite C450, San Francisco, CA 94143, United States. Oximetría cerebral: tres preguntas esenciales. * Please cite this article as: Meng L, Gelb AW. Gelb b a Associate Professor, Department of Anesthesia and Perioperative Care, University of California, San Francisco, California, United Statesī Professor, Department of Anesthesia and Perioperative Care, University of California, San Francisco, California, United States Oximetría cerebral: tres preguntas esenciales Cerebral oximetry: Three questions to ask *
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