Twelve female and twelve male healthy volunteers participated in this study where each subject served as his/her own control. Muscle pain was induced by intramuscular injection of 5% hypertonic saline into the right erector mucle of the spine.
Exposure duration: 20 min
pulsating half sine wave
|Setup||the coil was placed around the body at the L3 vertebral level where the catheter was located|
|Sham exposure||A sham exposure was conducted.|
|Additional info||During the exposure as well as sham exposure, muscle pain was induced by intramuscular injection of hypertonic saline (HS) by an infusion pump connected to the catheter via plastic extension tube. HS was injected into the right erector spinae muscle at the level of L3 spinous process. The muscle pain was induced twice in two separate sessions with at least 2 days interval between them. One session was accompanied by exposure and the other was conducted under sham exposure.|
|magnetic flux density||3.4 mT||effective value||calculated||-||at a distance of 30 cm from the coil|
|magnetic flux density||15 mT||effective value||unspecified||-||at the center of the coil|
|magnetic flux density||6.4 mT||effective value||calculated||-||at a distance of 20 cm from the coil|
|magnetic flux density||1.9 mT||effective value||calculated||-||at a distance of 40 cm from the coil|
Exposure to magnetic field differently affected subjective pain estimates in females and males. Exposure to magnetic field increased averaged pain level and time integral of pain ratings in females, whereas no statistically significant difference was observed in males. Pain related elevation of systolic and diastolic blood pressure was found during both real and sham exposure in both genders.