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Clinical Trial Summary

The aim of this study is to examine differences between respiratory function in female fibromyalgia patients and healthy controls. The study will also examine differences in spine mobility and pain intensity.


Clinical Trial Description

Fibromyalgia is characterized by persistent widespread pain and affects approximately 1-3% of the general population. Fibromyalgia is a multifactorial syndrome and much research has been done and several interesting facts discovered. Still, the etiology is unknown. The autonomic nervous system may be the cause of several symptoms of this condition and a pattern of abnormal autonomous functions has been described . Besides the autonomous nerve system the respiratory system has also potential to impact various body organs mainly by altered blood gas chemistry. Deviant respiratory function in local pain condition as in cervical and lumbar spine has been reported. Respiratory function in generalized pain as in people with fibromyalgia has not been given much consideration.

This project is an observational cross sectional study with the purpose to examine respiratory function in a group of females with fibromyalgia and compare with age-matched controls. Peak expiratory flow (PEF), Chest mobility, spinal mobility and pain palpation where measured at the same visit. Data about smoking habits was registered and in patients also the duration of pain. Measurement of the subject's weight and height were recorded and the body mass index (BMI) was calculated. For evaluation of forced exhalation, a Wright peak expiratory flow meter was used. PEF was measured three times and the best result was recorded. Spinal mobility was measured by using the Cervico-thoracic ratio (CTR) method. The CTR measure was done in a sitting position with the subject instructed to sit in an upright posture and look straight in front of them. The spinous process of the seventh cervical vertebra (C7) was palpated as the referent point and a mark was made on the vertex followed by marks for each motion segment between C7 to the fifth thoracic vertebra (T5) by using a CTR measuring strip. Then the subjects were told to flex the chin and the trunk forward as much as possible. Again, the distance between C7 and T5 was measured and the difference between measurements in upright position and maximum flexed position was calculated in mm for each segment to a total sum for all segments from C7-T5. A tape measure was used to measure the mobility of the thorax at maximum inhalation and exhalation at the level of proc. Xiphoideus. Every measurement was performed three times and the best measurement was recorded. Manual palpation for pain was done over the upper thoracic spine in the same area as the spinal mobility was measured, with subjects lying prone on an examination table. A total of 20 locations were palpated from C7 to T5. First left side facets, and then left side costotransverse joints in the same segmental level. The same procedure was then used for the right side. Palpation was done with a force of approximately 4kg/sq cm (equating to blanching of the thumb or fingernail). After each point was palpated the subject estimated perceived pain on a visual analogue scale.

A ratio was also constructed by PEF (l / min) / chest expansion (cm) called expiratory-inspiratory ratio. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03495687
Study type Observational
Source Uppsala University
Contact
Status Completed
Phase
Start date January 1, 2008
Completion date December 31, 2008

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