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Friday, 12 July 2013

CLINICAL TERMOMETER

CLINICAL, TERMOMETER

CLINICAL TERMOMETER:



Definition:
Thermometer, which is used to find temperature of human body by placing the bulb under tongue or in the armpit, is called clinical thermometer.


CONSTRUCTION:
It consists of a scaled glass capillary having a bulb and a bend near the bulb.

WORKING:
When bulb of thermometer is placed under tongue the mercury expands and rises through bend in capillary. This bend helps to stop backward movements of mercury after the. removal of thermometer from patient's mouth. In this condition scale gives the temperature of the patient. On giving jerk mercury returns ~o the normal positions.

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