It is recommended to first feel the valve and locate the inlet and outlet with your fingers.

Then place the open M.blue plus compass on the valve so that the direction of flow is correctly aligned with the arrow markings on the compass. Now the compass is closed and fine-tuned by very light movements of the instrument. If the float in the center of the compass is centrally aligned within the mark, the instrument is in the correct position for all further steps.

Once the float is centered, the currently set opening pressure can be read out from the line mark on the float.

Simply follow the line mark up to one of the two scales: For the opening pressure of the adjustable differential pressure unit (proGAV 2.0), the setting range of 0-20 cmH₂O on the outer scale applies, which is highlighted in light grey. For the opening pressure of the gravitational unit of the M.blue the blue marked setting range of 0-40 cmH₂O of the inner scale applies.

To adjust the opening pressure, the compass is opened without leaving its position.

The M.blue plusadjustment ring can now be inserted into the resulting opening in the middle. The marking on the adjustment ring should point to the desired opening pressure of the corresponding M.blue or proGAV 2.0scale. By applying light pressure with the index finger on the valve diaphragm which is located under the skin in the middle of the adjustment ring, the rotor brake is released and the opening pressure of the valve is changed to the desired value.

When adjusting the differential pressure unit of the proGAV 2.0, make sure that the opening pressure is changed by a maximum of 8 cmH₂O per adjustment process or by a maximum of 16 cmH₂O per adjustment process when adjusting the gravitational unit of the M.blue, otherwise errors may occur. After each adjustment, the set pressure level should be checked as described in steps 1 and 2.

The proGAV 2.0 Compass is used to locate and read out the set opening pressure.

The valve can be easily felt with the finger using the integrated template of the opened proGAV 2.0 Compass.

Now the proGAV 2.0 Compass is placed on the valve in flow direction and closed again. The proGAV 2.0 Compass will now display the set opening pressure.

The desired opening pressure is first selected on the proGAV adjustment instrument.

The proGAV adjustment instrument is now positioned on the valve in accordance with the operating instructions. By lightly pressing the release button, the "Active-Lock" mechanical coupling is released and the desired opening pressure is set.

First, locate the proSA palpation. The proSA VERIFICATION COMPASS is an auxiliary instrument for locating the proSA.

As the proSA VERIFICATION COMPASS is held above the valve, the floating disc aligns over the adjustable unit of the proSA. The current opening pressure setting can be read from the compass scale.

Position the proSA VERIFICATION TOOL central on the valve. The marking and the readout display on the proSA VERIFICATION TOOL must be in line with the proximal (ventricular) catheter. Press the trigger button to see the actual opening pressure setting displayed on the readout.

Select the appropriate opening pressure on the proSA VERIFICATION TOOL.

Position the proSA VERIFICATION TOOL centrally over the valve. The marking and the readout display of the proSA VERIFICATION TOOL must be in line with the proximal (ventricular) catheter. Unlock the rotor ("Active-Lock") by applying mild pressure on the trigger button and then check the setting with the proSA VERIFICATION TOOL.