Where is the mercury column switch on a tabletop sphygmomanometer?

The mercury switch is at the very bottom of the sphygmomanometer reading scale.

The tabletop sphygmomanometer consists of a balloon, a cuff, and a manometer. Benchtop sphygmomanometer mercury column switch at the bottom of the sphygmomanometer reading scale. The cuff's rubber capsule two tubes were connected to the balloon and the manometer, the three form a closed pipeline system. Desktop sphygmomanometer structure is simple, durable, stable measurement of blood pressure value, more accurate. Frequent use, poor maintenance, prone to failure, completely dependent on human subjectivity, poor repeatability, accuracy depends on the experience of clinicians, external noise interference on the "Koch's voice" recognition, carrying inconvenience.

After each measurement, the sphygmomanometer should be tilted 45 degrees to the right in order to allow the mercury to flow back to the mercury storage bottle, and at the same time, the mercury storage bottle should be closed with the mercury column switch of the desktop sphygmomanometer.

Expanded material:

Mercury spillage causes:

1, mercury spillage of its reasons for the sphygmomanometer use is completed, forget to close the mercury storage bottle on the switch;

2, due to the improper position of the holding, the mercury did not flow into the mercury storage bottle, and the mercury from the upper end of the glass tube of the scale of the air filter spillage;

2, due to the improper position of the mercury storage bottle, but make mercury from the upper end of the air filter

3, improper use, too much force when pressurizing, so that the mercury from the graduated glass tube washed out or overflow.

For the above reasons can take the following methods to solve:

1, after each use, be sure to make the mercury completely into the mercury storage bottle, and close the switch on the mercury storage bottle;

2, the use of slow, even pressure, especially in the mercury column will rise to the port of the glass tube, it should be more careful, careful;

3, if you find that the mercury amount decreases, it should be added in time to ensure the normal use of the sphygmomanometer.

Reference:

Baidu Encyclopedia - Tabletop Sphygmomanometer