Indications - Codman CERTAS Plus Manual Del Usario

When adjusting the valve, the changes between each
performance setting at flow rates of 5, 20, and 50 mL/h are:
Incremental steps between
settings 1,2,3,4
Incremental steps between
settings 4,5,6,7
Setting 8 is intended to limit flow through the valve and
has an average pressure greater than 400 mmH
When tested with a 120 cm long, 1 mm ID Distal Catheter
the average pressure increase is dependent on flow rate
as shown here:
5 mL/h
20 mL/h
50 mL/h
Intraventricular pressure is maintained at a constant
level by the ball and cone valve seat design. The ball is
manufactured of synthetic ruby, as is the matching cone.
Together these components provide a precise fit for
regulating the flow of CSF through the valve.
The SIPHONGUARD
of the valve, is designed to prevent excessive drainage
of CSF by the shunt system. Excessive draining can
be induced by a rapid increase in hydrostatic pressure
created by the elevation of the shunt ventricular catheter
with respect to the shunt distal catheter (i.e., when
patient moves from a supine to an upright position).
Graph 2 describes the pressure-flow performance
characteristics of the valve with SIPHONGUARD device.
Graph 2
The BACTISEAL
of the valve, are subjected to a treatment process by
which the silicone is impregnated with rifampin and
clindamycin hydrochloride. The BACTISEAL Silicone
Catheters have been shown to reduce the colonization
of gram positive bacteria on the tubing surface.
The CODMAN CERTAS Tool Kit must be used to adjust
the valve setting. It can also be used to confirm the
setting. The CODMAN CERTAS Tool Kit is available
separately (See Detailed Product Description).

Indications

The CODMAN CERTAS Plus Programmable Valve
is an implantable device that provides constant
intraventricular pressure and drainage of CSF for the
management of hydrocephalus.
The CODMAN CERTAS Tool Kit allows the noninvasive
reading or adjustment of the valve setting.
6 mmH
21 mmH
50 mmH
Device, included in some models
®
Additional Pressure Needed To Maintain Flow [mmH
Catheters, included in some models
®
15 – 40 mmH
20 – 50 mmH
O
2
O
2
O
2
4
O
2
O
2
O.
2
O]
2