Background and Aim: Some of the patients with chronic low back pain commonly do not experience full recovery with the conventional physical therapy. It is revealed that may be there are some items in subjects with low back, which are not studied well till now. Since there are some evidences about breathing pattern disorder in low back pain patients, the purpose of this study was to compare between some important breathing pattern index in non-specific chronic low back pain and healthy subjects .

Materials and Methods : In this descriptive analysis study, there were 16 patients with chronic non-specific low back pain and 16 healthy subjects. Both groups were matched and selected by some of the demographic characteristics. Respiratory data including respiratory rate, volumetric, time depended and chemical index were calculated by K4b2 instrument.

Results: They have significant differences in some of the respiratory parameters including respiratory rate, inspiration and expiration times and total time of respiration between two groups, whereas inspiration total time ratio, volumetric and chemical index do not have significant differences.

Conclusion: Existence of disorders in some parameters of respiratory patterns in patients with low back pain are revealed that survey of respiratory system in patients with chronic non-specific low back pain can be effective in diagnosis and treatment process in physiotherapy centers.

Keywords: Low back pain, Breathing, Respiratory chemistry.

Background and Aim: People with multiple sclerosis (MS) suffer from respiratory disorders during the course of their disease .To express disability, much of the interest was devoted to their mobility and less attention has been paid on physiological aspects such as respiration. The aim of this study was to compare some of the important indices of breathing patterns in healthy individuals and people with MS. Furthermore the correlation between duration of disease and disability scores (EDSS) with pulmonary indices were investigated.

Materials and Methods: In this descriptive analysis study, there were 32 people with MS and 32 healthy subjects. Both groups were matched and selected by some of the demographic characteristics. We investigated biochemical parameters that were assessed by measuring end-tidal CO₂ pressure, saturation of O₂ and respiratory rate using Capnograph. Student’s t-test was applied for independent samples. The relationships between duration of disease and EDSS with pulmonary indices were analyzed by Pearson’s correlation.

Results: The end-tidal CO₂ index had significant difference between the two groups and was lower in people with MS, whereas saturation of O₂ and respiratory rate did not have significant difference. There was a significant positive correlation among the disease duration and the disability scores, but was not associated with abnormal breathing pattern.

Conclusion: Existence of disorders in some parameters of  respiratory pattern in people with MS are revealed that survey of respiratory system in people with MS can be effective in the early diagnosis and treatment process of breathing problems in physiotherapy centers.

Keywords: Multiple sclerosis, Breathing pattern, Biochemical parameter, Respiratory dysfunction