Evaluation of the effectiveness of treatment of nonspecific pain in the lower back (LBP) is currently largely based on the patient's subjective feelings. The purpose of this study was to use passive medical radiometry (MWR) as a tool for assessing the effectiveness of various treatment methods in patients with acute and subacute nonspecific LBP. Patients with pain assessment on a visual analogue scale (VAS) from 6 to 10 points were divided into 2 groups: Group I included patients with pharmacological, syndrome-oriented treatment (n = 30, age 54.9 ± 2.3 years); Group II is a combination pharmacotherapy with self-controlled energy-neuro-adaptive regulation (SCENAR) (n = 25, age 52.8 ± 2.5 years). The investigators will compare that the addition of SCENAR therapy (Group II) will be able to potentiate the analgesic effect of the treatment using VAS. the investigators will confirm that the thermal asymmetry visualization allows to identify the area of pathological muscle spasm and/or inflammation in the projection of the vertebral-motor segment.

According to the Global Burden of Disease Study (2015), low back pain (LBP) has been one of the five leading causes of disability over the past 30 years. Indirect costs of unfulfilled work and social benefits are several times higher than the costs of actual treatment. In the "internal" structure of the LBP, nonspecific or musculoskeletal pain accounts for up to 80-90% of cases. LBP is characterized by a significant prevalence, high material costs for rehabilitation, and a large polymorphism of clinical manifestations. The number of treatment and diagnostic methods with a well-founded evidence base was very small. The main assessment of the effectiveness of therapy in most cases is based on the patient's subjective feelings and data from various questionnaires and scales. Subjunctivization of therapy evaluation leads to the underestimation of many treatment methods, which are questioned from the standpoint of evidence-based medicine. With this type of back pain, during clinical examination, radiography and MRI are inappropriate because of the lack of correlation between the severity of degenerative changes in the spine and the clinical picture.

It is the presence of pain that causes people to suffer, reduces the quality of life, and therefore non-steroidal analgesic drugs remain the drugs of the "first level". However, participants simultaneously have, especially with uncontrolled use, side effects on the gastrointestinal tract, cardiovascular, genitourinary systems, and other organs and systems.

Non-drug therapy is an important curative factor. One of the positively proven additional methods of treatment for various pain syndromes is percutaneous (transcutaneous) electro neurostimulation (TENS). The Cochrane Review showed the efficacy of TENS for acute pain of various origins. A comparative analysis with placebo was given with recommendations to consider TENS as a method of treatment, prescribed alone or in combination with other therapies. The method was also effective in treating neck pain in patients with whiplash injury after car accidents.

In addition to the subjective methods of assessing various methods and diagnostics of LBP treatment, passive medical radiometry (MWR) was chosen. The method is based on measuring the intensity of its own electromagnetic radiation of the internal tissues of the body in the ultrahigh-frequency range. MWR is widely used worldwide for various pathological conditions. It is known that processes occurring in the tissues of the body, especially those associated with pain, are often accompanied by a universal pathophysiological reaction. One of the signs of inflammation is an increase in temperature, which is associated with metabolic, vascular, and/or regulatory processes. Stable temperature changes precede or accompany clinical and morphological manifestations of the pathological process. Therefore, with a high probability, MWR can be used for early diagnosis and objective monitoring of treatment effectiveness.

Goal To evaluate the effectiveness of SCENAR treatment and MWR of various therapeutic regimens in patients with acute and subacute nonspecific LBP.

Materials and methods

The study is being carried out at the "Problematic Scientific Laboratory of Physical Methods of Diagnosis and Treatment" of Rostov State Medical University. A clinical randomized, parallel, divided into two groups (group selection method, even or odd), controlled, prospective study of patients with LBP is carried out. The local independent ethical committee of Rostov State Medical University approved the study (protocol No. 10/19 of 05/30/2019), and informed consent was obtained from all patients.

The total duration of the disease in patients ranged from 2 to 20 years, and the current exacerbation ranged from 1 d to 3 months. Clinical and neurological examination of patients with LBP is performed according to a specially developed protocol. The protocol included personal data, anamnestic data (including the duration of the current exacerbation), concomitant diseases, objective data, neurological status (including possible symptoms of radiculopathy and myelopathy), and a questionnaire for diagnosing neuropathic pain (Douleur Neuropathique en 4 questions - DN4). The inclusion criteria included patients with acute and subacute LBP of the musculoskeletal, nociceptive (with the duration of the current exacerbation up to 3 months inclusive), nonspecific character, caused by various degenerative-dystrophic lesions of the spine or paravertebral tissues (without specifying the source of pain) who were in outpatient or inpatient departments. The exclusion criteria included the presence of radiculopathy and myelopathy, known congenital anomalies of the spine, ankylosing spondylitis, reactive arthritis, rheumatoid arthritis, suspicion of a secondary nature of pain, gross cardiac arrhythmias, and probable neuropathic pain. Before treatment, some patients undergo MRI of the spine without axial load to exclude other diseases of the lumbar spine.

Inclusion Criteria:

• acute and subacute LBP of the musculoskeletal,
• nociceptive (with the duration of the current exacerbation up to 3 months inclusive),
• nonspecific character, caused by various degenerative-dystrophic lesions of the spine or paravertebral tissues (without specifying the source of pain) who were in outpatient or inpatient departments

Exclusion Criteria:

• presence of radiculopathy and myelopathy,
• known congenital anomalies of the spine,
• ankylosing spondylitis,
• reactive arthritis,
• rheumatoid arthritis,
• suspicion of a secondary nature of pain,
• gross cardiac arrhythmias, and probable neuropathic pain