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Clinical Trial Summary

The primary goal of this study is to investigate whether different alterations observed in patients with non-specific episodic low back pain (compared to healthy volunteers), detected using several assessments: psychophysical and neurophysiological testing, imaging, and blood sampling, are dependent or independent of the presence and type of pain experienced at the time of investigation.


Clinical Trial Description

The study consists of three visits (healthy volunteers will only have one pain-free visit), in which patients will be tested in a different "pain state" at each visit: 1. Pain-free visit: will be carried out when the patients have no or little (Numerical Pain Rating Scale (NPRS) </= 2/10) clinical pain. 2. Clinically relevant Low Back Pain visit: will be carried out with patients experiencing a low back pain episode with an intensity of 3/10 or more on the NPRS. 3. Experimental pain / Clinically irrelevant pain visit: will be carried out with the application of a high concentration (8%) Qutenza® capsaicin patch at the arm. Each of the visits will consist of psychophysical testing, neurophysiological assessement of sweat activity in response to pain, brain resting state magnetic resonance imaging and magnetic resonance spectroscopy. Additionally, and depending on the type of session, a lumbar spine magnetic resonance image (only pain-free session, as characterization) and a blood sample (only pain free and low back pain visit) will be performed. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT06412484
Study type Observational
Source Balgrist University Hospital
Contact Petra Schweinhardt
Phone +41 44 386 57 24
Email petra.schweinhardt@balgrist.ch
Status Recruiting
Phase
Start date October 1, 2023
Completion date December 31, 2027

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