Description And Operating Principle Of The Polaris® Adjustment Kit - Sophysa POLARIS SPV-140 Gebrauchsanweisung

Magnetic lock
The rotor of the Polaris® valve is fi tted with a patented magnetic locking system.
This self-locking system is based on the permanent reciprocal attraction of 2 mobile
micro-magnets of opposite polarity.
This "magnetic lock" holds the rotor in the selected position, thus preventing any
accidental change in operating pressure if the valve is exposed to magnetic fi elds.
In fact, in the presence of a standard magnetic fi eld (unidirectional) the two micro-
magnets are attracted in the same direction, so only one of the two magnets moves
in the direction of the fi eld, while the other remains locked.
Changing the operating pressure of the valve fi rst requires the simultaneous
unlocking of the two micro-magnets in the valve by a specifi c magnet.
The rotor can then turn freely on its central axis.
4. Description and Operating Principle
of the Polaris® Adjustment Kit
Changing the operating pressure of the valve is done percutaneously using
an adjustment kit specifi cally designed to adjust the Polaris® valve. It has 3 parts:
Locating Instrument (Locator)
Reading Instrument (Compass)
Setting Instrument (Magnet).
(cf. Table of References and Figures 4, 4a, 4b, and 4c):
Figure 4: The Polaris® adjustment kit
The components of the Polaris® adjustment kit are packaged, non-sterile,
in a re-usable box (Figure 4).
The Polaris® adjustment kit is a latex-free product.
Locating Instrument
The Locating Instrument (Locator, Figure 4a) is designed to locate the valve under
the skin, an essential step in reading and adjusting the operating pressure.
The Locator houses the Reading Instrument and the Setting Instrument in turn.
It enables Polaris® valves to be adjusted, whatever their pressure range, from among
the 4 ranges available (cf. §3 - Table of Operating Pressures).
Figure 4a: Locating Instrument (Locator with three special pressure reading rings)
1
3
6
5
The reading area [1] on the Locator shows the reference of the SPV valve and the
5 "standard" pressures relating to this product reference.
The reading areas [2] on the reading rings show the "special pressure" valve
2
4
3
6
7
references, SPV-140, SPV-300 and SPV-400, as well as each of the 5 pressures relating
to these references (cf. §3 - Table of Operating Pressures).
Two pins [3] on the rim of the Locator make it possible to attach the reading rings
so that the Locator will display the pressure range relating to the valve model to
be adjusted.
To adjust a valve, the Locator must be correctly positioned above the implant.
The green arrow [4] shows the direction of CSF fl ow, and makes it possible to position
the Locator correctly in relation to the valve.
The Locator center cut-out area in the shape of an imprint of the valve [5] is used
to position the Locator as close as possible to the implant.
Two guide pins [6] enable the Reading Instrument to be correctly positioned inside
the Locator.
The cut-out in the shape of an imprint of the Setting Instrument [7] makes it possible
to position the Magnet correctly inside the Locator.
Reading Instrument
The Reading Instrument (Compass, Figure 4b) fi ts inside the Locator and allows
a reliable, accurate, direct reading to be taken of the valve operating pressure.
The Compass determines the position of the valve rotor. This corresponds to
the operating pressure that has been read.
Figure 4b: Reading Instrument (Compass)
2
3
The operating pressure reading is determined by the alignment of the Compass
needle [1] with one of the lines on the contour of the Compass [2] and
the corresponding pressure value in the reading area of the Locator.
To position the Compass correctly in the Locator, the two lateral guide pins [3] of
the Compass must be inserted into the guide pins on the Locator.
Setting Instrument
The Setting Instrument (Magnet, Figure 4c) is made up of a specifi c assembly
of magnets designed to enable the valve rotor to be unlocked and the operating
pressure of the Polaris® valve to be adjusted.
Figure 4c: Setting Instrument (Magnet)
2
1
The Magnet is inserted into the Locator.
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3
1