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Additional description
SX-ELLA Stent Esophageal HV - HV
STENT (fig. 1) is braided of a wire made
of nickel-titanium alloy - nitinol, the
properties of which cause the unrivaled
flexibility as well as a great corrosion
resistance. The fact the stent is
braided of one piece of the wire (only
the antimigration ring is fixed to the
finished stent extra) makes the stent
ends non-traumatic, i.e. the stent does
not injure the esophageal wall during an
actual deployment or reposition if
misplaced. The radiopacity of the stent
is secured by markers, made of
platinum-iridium alloy, that are fixed
to a stent mesh; in addition, there are
gold-plated markers, fixed to strings at
both stent ends. The covering of the
stent is made of PE.
Beside the excellent flexibility, the
construction of the HV STENT and the
material used guarantee a sufficient
expansion force.
In general, stents sometimes migrate
(into stomach in this instance). To
decrease the risk of migration to the
very minimum, HV STENT is equipped with
an antimigration ring that is fixed
thereto circumferentially in the
proximal portion. However, if the HV
STENT migrates after all, the strings at
both stent ends may be used for removal
of the stent out of the body or for
reposition as mentioned hereinbefore.
HV STENT, if to be implanted into lower
part of the esophagus, is equipped with
an antireflux valve.
At the distal end, a delivery system of
the HV STENT (fig. 2) is equipped with a
soft tip, so-called olive, that is
detachable such that once the sheath of
the delivery system is being pulled back
to allow the stent to expand, the olive
is released first and simultaneously
splits in halves (see still the fig. 2).
Upon deployment of the HV STENT, the
delivery system is removed whereas the
halves of the olive pass out of the body
naturally.
Stents of this kind of a construction
such as HV STENT get shorten during
expanding from the delivery system thus
this feature shall be considered during
deployment.
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