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Temperature drops during fluid flow in catheters.

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  • Temperature drops during fluid flow in catheters.

    Hello All,

    I am currently involved in a research project where we are trying to pump
    water using a syringe pump through a catheter and have the temperature
    exiting the catheter increase or remain the same. However, with
    temperatures even as high as 80 degrees Celsius, the temperature exiting
    the catheter still experiences a dramatic drop. I take it that our system
    is similar to a throttling system mentioned in Thermodynamics but I am not
    positive. Our catheters are approximately six feet in length and only a
    few millimeters in diameter. They are usually 6 or 7 lumen catheters with
    liquid being pumped through the center lumen and oxygen pumped through the
    remaining lumens. I am looking for suggestions on how we can possibly
    eliminate this drop in temperature. I am assuming that it is due to a drop
    in pressure if our system represents a throttling system, such as a
    capillary tube. Is there a method to possibly increase the pressure before
    the water exits the catheter?

    Any help would be much appreciated.

    P.S. Does anyone know of a biomedical list server other than BIOMCH-L?

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