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
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
Energy per point
5mW av (25Wpeak)
1KHz x 200nS
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