Diode Laser in Cervical Myofascial Pain: A Double-Blind Study
versus Placebo
* F. Ceccherelli, * L. Altafini, * G. Lo Castro, * A. Avila, *F.
Ambrosio, and * G. P. Giron
*Institute of Anesthesiology and Intensive Care, University of
Padua, and the Associazione Italiana per la Ricerca e, l'Aggiornamento
Scientif co, Padua, Italy
Summary: We present a double-blind trial in which a pulsed infrared beam
was compared with a placebo in the treatment of myofascial pain in the
cervical region. The patients were submitted to 12 sessions on alternate days
to a total energy dose of 5 J each. At each session, the four most painful
muscular trigger points and five bilateral homometameric acupuncture points
were irradiated. Those in the placebo group submitted to the same number of
sessions following an identical procedure, the only difference being that the
laser apparatus was nonoperational. Pain was monitored using the Italian
version of the McGill pain questionnaire and the ScottHuskisson visual
analogue scale. The results show a pain attenuation in the treated group and a
statistically significant difference between the two groups of patients, both
at the end of therapy and at the 3-month follow-up examination.
Key Words: Laser&emdash;Infrared laser beam&emdash;Pain&emdash;Chronic
pain&emdash;Placebo&emdash;Double blind study.
Address correspondence and repent requests to Dr. F. Ceccherelli at the
Istituto di Anestesiologiae Rianimazione, via C. Battisti 267, 35121 Padova,
Italia.
The Clinical journal of Pain 5:301-304 copyright 1989 Raven Press, Ltd.,
New York
Wavelength |
Power |
Energy Density |
Power Density |
Energy per point |
Pulses |
904nm |
5mW av (25Wpeak) |
(not given) |
(not given |
1 J |
1KHz x 200nS |
|