Handheld System
Handheld System - Related Videos
05:40
Handheld Device for Saliva Pretreatment to Improve Cortisol Detection
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2026
This protocol describes a rapid saliva pretreatment method for improving cortisol detection. A handheld filtration device is used to remove mucins and other interfering substances while preserving the target analyte. The pretreated saliva exhibits improved capillary flow, thereby enabling more consistent and reproducible assay performance.
07:22
Measuring the Motor Aspect of Cancer-Related Fatigue using a Handheld Dynamometer
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Cited by 2 •
2020
Simple and accessible methods were developed to measure the motor aspect of cancer-related fatigue objectively and quantitatively. We describe, in detail, ways to administer the physical fatigue test using a simple handgrip device as well as methods to calculate fatigue indices.
12:03
Manual Construction of a Tissue Microarray using the Tape Method and a Handheld Microarrayer
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Cited by 5 •
2022
This protocol outlines the tape method on how to manually construct a tissue microarray using FFPE donor blocks of differing depths.
04:55
Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children
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Cited by 5 •
2018
Here, we present a protocol to use the handheld metal detector, to screen for the presence of ingested metallic foreign bodies in children who present to the pediatric emergency medicine department with a history of foreign body ingestion.
06:27
Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer
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Cited by 4 •
2019
The goal of the methods presented here is to measure aerosol optical thickness of the atmosphere. The sun photometer is pointed at the sun and the largest voltage reading obtained on an in-built digital voltmeter is recorded. Atmospheric measurements such as barometric pressure and relative humidity are also performed.
FAQs
The sensing element first captures a biological or physical signal, after which embedded electronics convert the signal into usable measurement data. Signal processing then analyzes that data, and the device presents the result through its user output. This integrated sequence supports near-real-time interpretation, allowing measurements to be assessed without transferring every step to centralized laboratory equipment.
Miniaturization reduces the size of the sensing and electronic components while preserving their ability to capture and interpret measurements. In bioengineering, this supports instruments that can travel to patients, field sites, or biological sampling locations. Microfabrication and low-power electronics further expand analytical capability, making compact platforms more practical for measurements outside conventional laboratory environments.
Low-power electronics help a handheld system operate within the constraints of a compact portable instrument. They support embedded sensing, analysis, and display without requiring the full infrastructure of a conventional laboratory. As these electronics advance, the system can accommodate broader analytical capabilities while retaining portability, which is important for point-of-care, field-based, and resource-limited measurements.
The principal distinction is where measurement and interpretation occur. A handheld system brings sensing, processing, and user output closer to the patient, sample, or field location, whereas centralized equipment remains tied to a laboratory setting. This difference can reduce reliance on centralized infrastructure and improve access to rapid measurements, although the system's value depends on its integrated sensing and analytical functions.
A basic workflow begins with positioning the instrument at the measurement site or introducing a biological sample to its sensing component. The captured signal is converted and analyzed by embedded electronics, then presented to the user through the device output. This sequence enables near-real-time assessment and can shorten the path from signal acquisition to an actionable measurement in field or point-of-care settings.
They are especially useful when measurements must be obtained near a patient, outside a conventional laboratory, or in a resource-limited setting. Applications described for these systems include point-of-care diagnostics, physiological monitoring, field-based measurements, and rapid assessment of biological samples. Their portability supports testing where transporting samples or relying on centralized equipment could limit timely access.
Depending on its integrated sensor and processing functions, the system can provide measurements derived from physiological signals, biological samples, or environmental and other physical signals. Its near-real-time output supports rapid assessment rather than requiring every measurement to be interpreted later in a centralized facility. This makes the resulting information useful for monitoring, diagnostics, and field-based biological evaluation.
Portability shifts measurement capability toward clinical, environmental, and field settings where conventional laboratory access may be limited. By reducing dependence on centralized equipment, a handheld system can make testing or monitoring more accessible and support faster assessment of biological conditions. This is particularly relevant to point-of-care work and resource-limited environments, where location and infrastructure directly influence measurement availability.