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Identifies early nerve damage (neuropathy) and helps determine treatment progress. More sensitive than an electromyelogram (EMG), it can detect abnormal function in small sensory nerves in patients with numbness or tingling, especially in the extremities, even when an EMG is normal.Indications: Diabetic pain and Neuropathy, Radiculopathy, Neuropathy Trigger point injections are used where bundles of muscle fibers become tight, knotted and unable to relax. They can occur as a result of injury, spinal or skeletal abnormality or poor biomechanics. Treatment to relieve trigger points include targeted trigger point injections of local anesthetic with or without steroids, chiropractic care, massage, stretching and physical therapy. In intractable cases, botulinum toxin injections often provide substantial and lasting relief. Indications: Myofascial pain, neck pain, shoulder pain, back pain

Quantitative Sensory Testing Mansfield TX

Quantitative Sensory Testing (QST) is a non-invasive and painless technique that assists in early detection, therapeutic selection and to monitor the progress and recovery of patients with peripheral sensory disorders.

The technique is used to assess sensory and pain reception in patients.

It is used to diagnose peripheral nervous system disorders such as chronic pain, diabetic pains, and pains from other medical conditions or diseases.

Quantitative sensory testing can be used to measure the degree of sensation and pain thresholds in cold and warm temperatures. It is also used to measure vibration sensation threshold. 

How Quantitative Sensory Testing works

The diagnostic power of QST as a tool in diagnosing peripheral sensory disorders is the unique combination of instrumentation and technology that is integrated with advanced software and hardware.

The degree of sensations, pain thresholds and vibration sensation thresholds are attained by stimulating the skin of the patient and comparing the results with the normal values built in the software. 

Using Quantitative Sensory Testing for detection of diabetes

QST for detection of diabetes includes accessing temperature changes, vibration and tactile stimulation.

Temperature changes are brought about by small unmyelinated nerve fibers that can be affected early in diabetic sensorimotor polyneuropathy (DSP) which result in abnormal thermal perception threshold.

According to research that was conducted, it was found that about half of the adults with diabetic sensorimotor polyneuropathy have normal nerve conduction velocity but abnormal thermal perception threshold.

It was also found that 21-23% of children and adolescents with type 1 diabetes had an abnormal cold thermal perception threshold.

These abnormalities were related to glycemic control and puberty status.

Elevated vibration perception was also reported in 62.5% of children in a 6-year prospective longitudinal study. It was found that abnormalities were related to male gender, age, and urinary albumin excretion rate.

Using Quantitative Sensory Testing to measure neuropathic pain

QST can be used to measure sensory thresholds for pain, touch, vibration and temperature.

It can be used to measure the degree of or severity of pain such as cold-pain and mechanical pain detection thresholds.

Elevated sensory thresholds correlate with sensory loss.

Certain QST findings show that specific pathophysiologic mechanisms may be associated with neuropathic pain. Also, heat hyperalgesia may be associated with peripheral sensitization and static mechanical hyperalgesia or dynamic mechanical allodynia may be associated with central sensitization.

In asymptomatic patients, abnormal QST thresholds suggest that the patient has subclinical nerve damage.

When the quantitation of an individual patient’s sensory perceptions is compared with normative values, it gives a clearer distinction between normal and abnormal responses. It also allows for analysis across patient and disease groups and for baseline standards in longitudinal studies.

In two patients with postherpetic neuralgia and similar chronic pain levels, the QST results will suggest peripheral and central sensitization in one and hyperactive deafferentation of spinal cord neurons in the other.

Quantitative sensory testing in chronic musculoskeletal pain

Central hypersensitivity has been ensnared as a supporter of anomalous pain reactions in musculoskeletal pain and has even been embroiled in the progress from acute to chronic pain.

The early detection of central hypersensitivity may enable clinicians to make progressively precise prognostic predictions and to distribute patients to the suitable administration systems, maybe focusing on these focal changes.

Quantitative sensory testing gives one method for estimating such focal procedures with a psychophysical approach that tests the capacity of the entire sensory axis utilizing standardized stimuli

The threshold at which a stimulus is detected is used to access the nerve function of the peripheral nervous system diseases. The threshold at which a boost is accounted for as painful is a pointer of basal affectability.

Empirical and theoretical concepts of the sensory threshold are the two distinct thresholds that have been developed.

In an empirical threshold, a sensory threshold is the stimulus level required to achieve perception.

In a theoretical threshold, a sensory threshold is a property of signal detection.

The method of limits approach is an empirically created technique where the force of an applied stimulus is increased or reduced until the subject sees or feels it as painful and stops the stimulus by a controller. The value of the threshold is determined by the calculation of the mean values during the series of stimuli. 

Benefits of quantitative sensory testing

There are different benefits or advantages of quantitative sensory testing. These include:

  • It provides access to quantitative and precise clinical findings on the peripheral sensory nerve function.
  • It is a non-invasive, painless technique.
  • It is an efficient, fast application in clinical settings
  • It is easy to use and provide compact solutions that can be used in any type of clinical setting.
  • It is a robust, user-friendly application and data processing that gives room for constant development and update.
  • Quantitative sensory testing is a normative data based on years of advanced research and proven data.

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