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        <div id="content-top1">Page 5 - CAPITULO 1 La RespiraciÃ³n</div>
        <div id="content-top2">P. 5</div>
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    <pre style="white-space:pre-line"><code>Estas alteraciones son la causa mÃ¡s frecuente de hipoxemia (disminuciÃ³n de la PO2
en sangre arterial) e hipercapnia (retenciÃ³n de CO2 en sangre).

DIFUSIÃ“N PULMONAR
        DespuÃ©s que los alveolos son ventilados, el siguiente paso en el proceso de la

respiraciÃ³n es la difusiÃ³n del O2 desde el alveolo al capilar y el del CO2 en sentido contrario
para ser expulsado al exterior. Este intercambio gaseoso, se lleva a cabo debido a los
gradientes de presiÃ³n de los gases, pasando de donde hay mÃ¡s concentraciÃ³n a donde hay
menos.

        En algunas patologÃ­as pulmonares, el alveolo se llena de lÃ­quido y/o secreciones,
dificultando el paso de gases, siendo los trastornos de la difusiÃ³n, otra causa de hipoxemia.

          Tabla 3: Fases de la respiraciÃ³n.
www.enfermeriarespira.es</code></pre>
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