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Related Concept Videos

Instrumentation Amplifier01:25

Instrumentation Amplifier

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An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
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Instrument Calibration01:12

Instrument Calibration

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Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
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Instrument Transformers01:23

Instrument Transformers

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Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...
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Uncertainty in Measurement: Reading Instruments02:46

Uncertainty in Measurement: Reading Instruments

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Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
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Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

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Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
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Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

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Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
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Related Experiment Video

Updated: Feb 10, 2026

Field Identification of Matricaria chamomilla using a Portable qPCR System
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[Portable instrument for arteriosclerosis assessment].

Shuai Cao, Xiang Chen

    Zhongguo Yi Liao Qi Xie Za Zhi = Chinese Journal of Medical Instrumentation
    |May 21, 2014
    PubMed
    Summary

    A new portable device for arteriosclerosis assessment was developed for home use. This instrument accurately measures pulse wave velocity, aiding in early detection of arterial stiffness.

    Area of Science:

    • Biomedical Engineering
    • Cardiovascular Diagnostics
    • Medical Devices

    Context:

    • Arteriosclerosis assessment traditionally requires specialized equipment.
    • Home-based monitoring for chronic conditions is increasingly important.
    • Non-invasive methods for cardiovascular health assessment are in demand.

    Purpose:

    • To develop a portable, user-friendly instrument for arteriosclerosis assessment.
    • To enable home care monitoring of arterial stiffness.
    • To create a cost-effective and low-power device for widespread use.

    Summary:

    • A portable instrument integrating ECG and pulse wave sensors (carotid, radial, dorsal) was developed.
    • The device features an acquisition board for signal conversion and an embedded module for display, storage, and pulse wave velocity (PWV) calculation.

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  • The instrument is designed for simplicity, expandability, low cost, and low power consumption.

    • Impact:

    • The developed portable instrument demonstrates high accuracy and repeatability in assessing arteriosclerosis.
    • Facilitates convenient and continuous monitoring of arterial health in a home setting.
    • Potential to improve early detection and management of cardiovascular diseases.