Low frequency pulsed signal and it's effect on
calcified supraspinatus tendon
By, Clifford S. Sullivan, MD
To evaluate the effect of a non-invasive, specific method of indirect electrical stimulation on calcified supraspinatus tendon (hydroxyapatite biological complex) of the human shoulder.
Subjects with the afflicted condition (re: calcified bursitis) were exposed to a very low frequency multi-axial pulsed magnetic field for a time duration of 30 minutes daily for two weeks and thereafter every second day for four weeks for a total treatment period of six weeks.
The pulsed magnetic field signal is very specific that is the co-ordinates (electric signal (waveform), intensity (microtesla), frequency (hertz), time (minute) and polarity (+or-) did not varied during the treatment.
The effect of the pulsed signal was evaluated by X ray studies of the shoulder before and after treatment. Controlled patients were included in the study.
This treatment shows evidence that very low frequency pulsed magnetic field ionizes the hydroxyapatite biological complex (calcium phosphate-calcium carbonate) found at the site of the supraspinatus tendon in human in all case studied (n=10).
HISTORICAL REVIEW AND EVOLUTION IN THE TREATMENT OF THE ROTATOR CUFF PATHOLOGICAL CONDITIONS IN HUMAN SHOULDER
The terminology 'periarthritis humeroscapularis' was introduced by Duplay (Duplay 1872) to describe a pathological condition characterized by pain and stiffness in the shoulder joint. From autopsy observation Duplay determine that this condition seems to lie in the subacromial or subdeltoid bursa. He concluded that it was probably either destruction or fusion of the bursa.
Kuster( Kuster 1882) and Colley (Colley 1889) in Germany concluded as Duplay.
Painter, 1907 recognized with the advent of roentgenography the presence of calcium shadows in the soft parts between the acromion and the greater tuberosity.
The same finding was made by Stieda, (Stieda, 1908) who assumed that these calcium masses were situated in the wall and in the lumen of the subacromial bursa. These new findings were indiscriminately termed bursitis calcarea.
The term "bursoliths" was even used by Haudek (Haudek, 1911) and Holzknecht.(Holzknecht, 1911)
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