QBioscan



Introduction


QBioscan has been created to enable a precise evaluation of sweat gland function. It is based on a measuring method, whereas patients place their hands and feet on stainless-steel electrodes and are exposed to an incremental low direct voltage - lower than 4 V - that is released in intervals of two minutes. What is being tested is the electrochemical reaction between electrodes and chloride of the, through low voltage stimulated sweat glands. This active, new method provides information and evidence of a sweat dysfunction that might otherwise not be detectable in physiological conditions. Bioelectrical Conductances (BEC, in microsiemens, uS) for the hands and feet, express the quantitative results, while a risk score is derived from demographic data and the BEC values.

The QBioscan system, in accordance with the 21 CFR 882.1540, represents a galvanic Skin response device that provides skin conductance measurements on a computer screen.

QBioscan is, similar to a galvanic skin response stress test, an active test that measures the sweat glands` capacity to release chloride ions following an electrochemical stimulation. It works by measuring the electrical potential difference caused by the electrochemical reaction of electrodes, which are applied to the skin and are stimulated by a low voltage of variable amplitude. QBioscan comes with 5 independent electrodes for placement on the body, for example feet or palms and other areas with a high number of sweat glands.

QBioscan provides information that determines the cardiometabolic risk in patients. The test, equivalent to a galvanic skin response stress test, measures the sweat glands' capacity to release chloride ions in response to an electrochemical activation.
The advantages: QBioscan does not require any patient preparation, such as blood drawing or fasting; it is non-invasive and delivers immediate results, with findings that are ready to use after a short and uncomplicated test of merely 2 minutes.
QBioscan has been developed for use by general practitioners, pharmacists, cardiologists and neurologists to assist in the effective screening of cardiometabolic risk in patients.

Analytical Overview


* Small unmyelinated C-fibers are responsible for the function of sweat glands
* Sudomotor dysfunction has been established as one of the earliest detectable neurophysiologic abnormalities in distal small fiber neuropathies.
* As an index of the severity and distribution of automatic failure, quantitative assessment of sweat response has been proposed. It will also serve as an early indicator for regeneration of small fibers.
* Diabetic patients have been observed to experience a degeneration of small C-fiber innervating sweat glands
* QBioscan measures bio electrochemical sweat skin conductances (BEC), which are directly connected to the capability of the glands to transfer chloride ions and which reflects small-C fiber status.
* QBioscan is a fast and easy method to measure sweat function.

Advantages


* Analyze and test QBioscan responsiveness and accuracy in detecting diabetic neuropathy and compare it with existing standardized tests for the diagnosis of diabetic neuropathy.
* Evaluate QBioscan in patients with Diabetes Mellitusm, as an instrument to assess autonomic neuropathy and neuropathic pain.
* QBioscan is an innovative, sensitive tool for the detection of diabetic neuropathy, especially painful diabetic neuropathy. As sweat glands are innervated by small c fibers, which are also involved in pain pathways, precise measuring of the sweat gland function can identify that cause.
* QBioscan, a sensitive device to detect neuropathy in patients with diabetes mellitus, operates with a sensitivity of 80% and a specificity of 95%.
* When compared to non-painful neuropathy, feet BEC was significantly decreased in patients with painful diabetic neuropathy.
* These results suggest that the peripheral autonomic nervous system plays a role in painful diabetic neuropathy.
* QBioscan results correlated significantly with clinical neuropathy scores, pain scores and measures of autonomic dysfunction.


Key Benefits


  • Quantitative Sudomotor Axon Reflex Test (QSART)
    Quantitative Sudomotor Axon Reflex Test (QSART) is a test to evaluate the integrity of the postganglionic sudomotor system along the axon reflex to define the distribution of sweat loss. This is accomplished by the release of acetycholine into the skin which activates receptors on the eccrine sweat gland. The sweat response is recorded from four sites (forearm and 3 lower extremity sites) and assessed for deficits.

    The QSART is a test that measures the autonomic nerves that control sweating. The test is useful in assessing autonomic nervous system disorders, peripheral neuropathies and some types of pain disorders. The test requires a mild electrical stimulation on the skin called iontophoresis, which allows acetylcholine, a naturally occurring chemical, to stimulate sweat glands. The QSART measures the volume of sweat produced by this stimulation.

    QSART is used to diagnose:

    - Painful, small fiber neuropathy when nerve conduction test results are normal
    - Disturbances of the autonomic nervous system, which controls the sweat glands, heart, digestive system, other organs, and blood pressure
    - Complex pain disorders
    - Diabetic neuropathies
    - Enzyme disorders
    - RSD (Reflex Sympathetic Dystrophy, Complex Regional Pain Syndrome)
    - Dysautonomia
    - Pharmaceutical agents
    - Cosmetics/Consumer goods testing
    - Dermatological studies
    - Multiple System Atrophy (Shy-Drager syndrome)

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  • Sympathetic Skin Response (SSR)
    Sympathetic Skin Response (SSR) measures change of the electrical potential of the skin. The recorded skin potential comes from the activated eccrine sweat gland. The amplitude and configuration are adjusted by sweat gland epithelium and the overlying epidermis.

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  • Sudomotor Electrochemical Sweat Conductance
    QBioscan provides information that determines the cardiometabolic risk in patients. The test, equivalent to a galvanic skin response stress test, measures the sweat glands' capacity to release chloride ions in response to an electrochemical activation.
    The advantages: QBioscan does not require any patient preparation, such as blood drawing or fasting; it is non-invasive and delivers immediate results, with findings that are ready to use after a short and uncomplicated test of merely 2 minutes.
    QBioscan has been developed for use by general practitioners, pharmacists, cardiologists and neurologists to assist in the effective screening of cardiometabolic risk in patients.

    Read More
  • Bioelectric Impedance Analysis (BIA)
    As a physician, you know that the Body Mass Index (BMI) by itself is not sufficient to analyze a patient's health status and body composition thoroughly.
    Fat, muscle, water and other important indicators of underlying medical conditions are not considered in the BMI.
    Reason enough for Medeia to develop exactly that - a new device that measures patients' body compositions - the "BCA" (Body Composition Analyzer). As a component of the QBioscan, it produces all these measurements and values at medical science highest standard levels.

    As a result, now a tool exists that, in less than 20 seconds, can determine fat mass, extracellular and intracellular water, and skeletal muscle mass, all fundamental assessment components to aid an accurate patient evaluation. Simple, user friendly, and with medical precision, this device can conveniently be integrated into your examination routine.

    In order to make QBioscan the optimal medical Body Composition Analyzer for working conditions in hospitals and medical practices, we looked beyond the many technical requirements and at the advantages and benefits that are valuable and of importance to medical staff and patients. We understood it had to be fast and easy to use and the measurement results had to be reproducible under normal clinical working conditions. That's' how we designed and build QBioscan.

    The QBioscan provides physicians and other users with a myriad of diagnostic options. Analytical modules provide accurate ratios for, for example extracellular to intracellular water, or fat mass to weight, and present doctors with indications of medical disorders that would otherwise need additional examinations to be diagnosed. The graphic presentation of the results is another benefit. It provides a summary and overview and helps visualize the data.

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  • Electro Interstitial Scan
    It is recommended to test the functions of the device before measurement, to ensure that the connection to the patient is satisfactory and hardware and software are operating properly. With the onset of measurement, a weak DC current (200 uA) is used and an imposed voltage of 1V between the six tactile electrodes that performs a sequence of successive measurements on eleven pathways of the body. Starting from anode to cathode and then from cathode to anode, the software changes the polarity for each pathway and measures the conductance of each pathway. Six electrodes are placed symmetrically on the hands, feet and forehead of the patient and a direct current of 1V is applied. For a recording of 11 segments in measurement sequence, each electrode is first in cathode and then in anode (bipolar mode), transmitting the intensity in numeric format to a program that stores the information.
    A weak DC current, with the help of 6 tactile electrodes, is sending alternatively between 2 electrodes with a sequence, and a record of the electrical conductance of 11 pathways in the subject's body is displayed by the QBioscan system.
    The QBioscan system is a galvanic Skin response device that provides skin conductance measurements on the PC screen in accordance with the 21 CFR 882.1540.

    The device uses two techniques: The Bio Impedance Analysis (BIA) and the Bio Impedance Spectrometry (BIS).
    The purpose of BIA is the estimation of body composition and water balance but it is also used in cardiology and imaging.
    The BIS is another technique for the estimation the body composition and water balance, but it can also be used to estimate neurotransmitters.

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Features


* Quantitative Sudomotor Axon Reflex Test (QSART)
* Sympathetic Skin Response (SSR)
* Sudomotor Electrochemical Sweat Conductance Threshold
* Bioelectric Impedance Analysis (BIA)
* Body Composition Analyse
* Electro Interstitial Scan (EIS)
* Electrical Dispersion Analysis (EDA)
* Easy-to-use intuitive colorful graphical user interface
* Backed by 30 years of documented medical studies
* Easy software installation and automatic hardware detection
* Supported Languages: English, Spanish, Italian, German, Chinese, Japanese, French

Standard Compliance


* QBioscan is an FDA 510k cleared product. Please contact your local sale representative for more detail information. Some testing modules in the US version may not be available or may be available for research purpose only.

* QBioscan also compliance with the following standards:
EN ISO 13485:2003, EN 60601-1:1990, EN 60601-1-1:2001, EN 60601-1-2:2001, EMC

Minimum Computer Requirements


* CPU 2 GHz (or equivalent)
* 4 GB of RAM
* Video card with at least 1024x768 and High-Color resolution
* 4 GB of free hard disk space
* One available USB port, version 1.1 or higher
* Windows 7/8/10 Operating system