py has to be interrupted during physical rest, especially at
Kraft
night. On removing a bandage of this type, moreover, the
blood shoots into the vessels from which the pressure has
K
2
Schematic diagram of the force-stretch behaviour of low-stretch band-
been relieved and severe itching develops which is not
ages during muscle activity: K1 is the application pressure of the
∆K only unpleasant but also undesirable in view of the
bandage on the unmoved extremity (resting pressure), K2 the force
K
1
opposed by the bandage to the expansion of the muscle during mus-
patient's tendency to eczema.
cle contraction (working pressure).
Dehnung %
Kraft
Based on the criteria described, the materials available
∆D
for bandage therapy can be divided into
With low-stretch bandages, the difference in force ∆K is character- ▪ rigid zinc paste bandages exerting the highest working
ized by the steep increase in the curve with a given stretch differ-
pressure and lowest resting pressure;
∆K
ence ∆D. The pronounced amplitude is typical of a low-stretch
▪
bandage with its high working and low resting pressure.
relatively inelastic, low-stretch bandages with high
working pressure and low resting pressure;
▪ readily elastic, long-stretch bandages exerting relatively
∆D
low working pressure and high resting pressure. For the
reasons already described, however, long-stretch band-
Of all the compression bandages,
The suitability of a compression bandage for a given ther- ages are not suitable for the acute phase of treatment,
the semi-rigid, unyielding zinc
apeutic indication therefore depends on what ratio although they are extremely popular because of their
paste bandage provides the
greatest decongestion of deep
between working pressure and resting pressure can be good adaptability. The actual domain of long-stretch
venous regions. Two-way-stretch
achieved with the bandage. bandages is functional bandages applied to produce a
bandaging materials, such as the
supporting or relieving function.
Varolast zinc paste bandage, also
Material which generates a high working pressure and a
allow less experienced persons to
apply effective zinc paste band-
low resting pressure is most effective in supporting the As regards application techniques, a distinction is made
ages.
mechanism of the muscle vein pump. Due to the rhythmic between permanent bandages which remain in place for
alternation of very high and low compression pressure, prolonged periods, and temporary bandages.
the pressure peaks occurring during muscular contraction
exert an effect extending deep inside the tissue, while The stage of treatment also has to be considered when
during muscle relaxation the nutritive vascular regions of selecting which compression methods to use. In the acute
the terminal vessels are relieved and aerated. phase, a compression bandage consisting of zinc paste or
low-stretch bandages is always used, since they can
Bandages with a relatively low working and a high rest- respond more effectively to the variations in leg circum-
ing pressure, on the other hand, subject the blood vessels ference. If the leg is permanently decongested and the
to constant, permanent pressure, and the effect is con- ulcer has fully healed, however, continuation treatment
fined to the superficial regions. The aeration effect is lost. can be carried out using individually fitted compression
Under resting conditions, compression techniques are stockings.
therefore tolerated better the lower the resting pressure.
If the resting pressure is too high, the compression thera-
Compression therapy [66.67]
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