Valve Adjustment: Implanted Valve Mode; Valve Adjustment: Packaged Valve Mode With An Implanted Valve - Johnson & Johnson Codman VPV System Mode D'emploi

Valve Adjustment: Implanted Valve Mode

1. Follow Setting Up the VPV System to set up the equipment and turn on the power.
2. To select the implanted valve mode, press the mode selection until the LED beneath the implanted valve
mode icon illuminates. The program unit beeps and the LCD panel displays the following message:
3. Press the appropriate pressure selection key on the front panel. The program unit beeps; the corresponding
LED illuminates and the lamps on the transmitter illuminate. At the same time, the display changes to:
4. Palpate the scalp to locate the shunt system and the implanted valve. Gently palpate the valve to locate the
hard inlet valve portion, approximately 10 mm long (see Figure 5 for valve schematics). A fluoroscopic
screen can assist in this process.
Note: It is not necessary to shave the scalp for this procedure.
5. Part any hair with the fingers. Apply a pea-sized amount of ultrasound gel, approximately 2 mm thick, to the
patient's scalp directly over the valve inlet portion. When the center rod of the transmitter compresses the gel,
the gel's diameter should be equal to or slightly larger than the diameter of the center rod. This will result in
an air-free connection between the scalp and the center rod of the transmitter.
Alternate method: apply ultrasound gel to the entire bottom surface of the center rod to a thickness of
approximately 2 mm.
CAUTION: Avoid contact between the gel and the feet of the transmitter. This can distort the acoustic
signal and cause a "REPEAT ADJUSTMENT" message to be displayed.
6. Before placing the transmitter on the scalp, ensure that the arrow on the transmitter housing is in line with the
direction of fluid flow through the shunt (Figure 6).
7. Place the transmitter on the scalp so the center rod is in the center of the ultrasound gel (directly over the
hard inlet portion of the valve) and the transmitter's feet contact the patient's scalp. The center rod may
recede slightly and the gel will compress.
CAUTION: Hold the transmitter in place until Step 10 is complete. Movement can interfere with the
acoustic monitoring process.
CAUTION: Eliminate or minimize ambient noise, such as talking, during the adjustment process.
Excessive noise can interfere with the acoustic monitoring process.
8. Press the transmitter's start button. The program unit beeps once and the LCD display changes to:
CODFR10065zz10svn.indd 5 CODFR10065zz10svn.indd 5
IMPLANTED VALVE
PLEASE SELECT
PRESSURE
IMPLANTED VALVE
POSITION
TRANSMITTER HEAD
PRESS START
ADJUSTING VALVE
PLEASE WAIT
9. During the adjustment, the pressure selection keys light sequentially and the program unit emits a series of
clicks until the selected setting command has been issued to the valve.
10. When the adjustment is complete (approximately 3 seconds), the program unit emits one long beep and the
display changes to:
ADJUSTMENT COMPLETE
PRESS A KEY
Note: If the acoustic monitoring feature did not receive an expected response, the program unit will emit
three beeps and one of the two screens below will be displayed. Refer to Troubleshooting and follow the
instructions for completing the adjustment.
REPEAT ADJUSTMENT
PRESS A KEY
NO SIGNAL
REPEAT ADJUSTMENT
PRESS A KEY
11. After the "ADJUSTMENT COMPLETE" message is displayed and you press any key, the LCD panel
changes to the original message:
IMPLANTED VALVE
PLEASE SELECT
PRESSURE
12. Turn off the power switch of the program unit and unplug the power cord from the power source.

Valve Adjustment: Packaged Valve Mode With an Implanted Valve

To adjust a newly implanted valve, use a sterile drape to protect the patient from contact with the transmitter.
Follow the instructions below. Note: Select the Packaged Valve mode when a drape is used because the Implanted
Valve mode will likely result in a "REPEAT ADJUSTMENT" message due to the interference caused by the drape.
1. Follow Steps 1 through 9 of Valve Adjustment: Implanted Valve Mode, with the following exceptions.
a. select the packaged valve mode
b. use a sterile drape between patient and transmitter
c.
DO NOT USE ultrasound gel
2. Follow Steps 7 through 9 of Valve Adjustment: Packaged Valve Mode to complete the adjustment.
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