Basis, indications and risk
Other physical treatments
It consists of the application of local heat, cold, massages or
short wave diathermy, ultrasounds, magnetotherapy or laser.
Objective
To improve pain
Theoretical base
Although there are routinely used procedures, there are no studies
that either prove their efficacy in back pain -see below- or that
precisely define how the effect is obtained.
Vessel dilation is an essential aspect of inflammation,so
that application of cold could be beneficial for contracting vessels.
It is assumed that muscle
contraction negatively affects blood circulation to the muscle,
which increases pain. In those cases where this could be an important
factor, such as in chronic cases, heat is considered to be beneficial,
since it tends to dilate vessels and improve blood circulation.
On this basis, massage application is also considered to have a
beneficial effect by stretching contracted muscles.
Basically, short wave diathermy and laser produce a more penetrating
heat effet on a specific point - not on an area-, reaching deeper
tissues. But this does not necessarily mean that back pain is improved.
Some laboratory studies suggest that laser may increase the degree
of cell activity, although it remains to be defined how this effect
can produce back pain improvement.
Also, none of these theories on the empirical basis of physiotherapy
would explain the potential effect of these procedures beyond the
time of application.
Evidence of efficacy
The existing recommendations
based on scientific evidence establish that, despite the fact that
this type of treatment is widely used, it has not proven to be effective
in treating back pain.
Indications
The existing recommendations
based on scientific evidence establish that there is no scientific
evidence to prescribe any of these treatments, and therefore do
not recommend them. Some of those recommendations
suggest that if a patient requests physical therapy, the physician
may advise self-application of heat or cold, at home, for temporary
symptomatic relief.
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