October 2021 — Question 45
What is the CLASSIFICATION of a battery-powered, digital blood-pressure monitor? The machine is composed of a fabric sleeve, a microphone, an electrical cord connecting the sleeve to the control unit, and the control unit. The control unit is housed in a plastic case and consists of two buttons for the power and start functions, a switch for various settings, and a LCD screen that displays the measurements. The machine operates by inflating the sleeve around the user’s arm, at which point the microphone picks up the arterial pulsating sound and transforms it into an electrical signal, which in turn is converted into a blood pressure reading within the control unit for display. In this respect, the machine operates in a manner similar to a sphygmomanometer, but allows blood pressure readings to be taken directly by the user and without the use of a stethoscope.
- A8518.10.8030
- B8543.70.9960
- C9018.19.9550✓ CBP's answer
- D9018.90.5040
- E9031.80.8085
CBP's cited authority
Answer and citations as published in CBP's official answer key for the October 2021 examination.
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