Chapter 3: Performing A Study - biodex PULMONEX II Operation Manual

3. Performing a Study
(See Figure 8)
NOTE: Oxygen input should not exceed eight psi with regulator. Oxygen input, with a flow rate
meter, should be six to eight liters/minute, not to exceed 10 liters/minute.
1. Using a source, position the patient in front of the scintillation camera. Ensure both lungs
are within the crystal area.
2. Set the camera for Xe-133. Be prepared to record all data after xenon injection.
3. Turn the Power Switch, located on the patient side of the unit, to ON. (0 is OFF, 1 is ON.)
NOTE: even after the Power Switch is set to the ON position, power will not be evident until
the Timer has been turned ON.
4. Place the Pulmonex II as close to the patient as possible and set the pointer on the master
control handle to "Start" position #1.
5. Set "Patient Air Flow" control to 30 (an arbitrary figure that can be changed to accommodate
the patient's breathing pattern). Set "Trap Air Flow" control to "0".
6. Press the button on the front panel to add Oxygen to the "To Patient" bag. Only add a small
amount of Oxygen, about one quarter full. (the bag will only move slightly, do not fill it up.)
More Oxygen can be added later if it is required for the patient. In many cases, it is possible
not to add any Oxygen and perform the entire study on ambient air. In all cases, the Oxygen
is only to enrich the air in the circuit.
Note: To perform a study using ambient air, turn the Pulmonex II on using the timer and
proceed to set the handle to the "Single Breath, Equilibrium" position #2 before connecting
the patient to the system. When the "To Patient" bag is one-quarter full, switch the handle
back to position #1. To add ambient air, turn the Air Flow up to 100, add the desired
volume, and turn the Air Flow back to 30. The system is now ready to use.
7. Make sure the system is in "Start" position #1.
8. Set the timer to nine minutes (an arbitrary figure that can be changed at any time
depending on the study procedure).
9. Remove the face mask or mouthpiece from the tubing.
10. Place the face mask over the patient's face and attach mask retainer or mouthpiece and
nose clip. Have the patient breathe to get accustomed to the face mask.
11. With the handle in the "Start" position #1, connect the mask to the hose. Instruct patient to
breathe briefly while becoming accustomed to the face mask and tubing. The "From Patient"
bag will move slightly as the patient exhales.
12. Switch the handle to "Single Breath, Equilibrium" position #2. Use either an injector gun or a
syringe filled with xenon, and puncture the injection site of the face mask, mouthpiece or
direct dose adapter. Add xenon as the patient takes a deep breath. Instruct patient to hold
breath for as long as possible. After exhaling, the patient should resume normal breathing
while you increase the "Patient Air Flow" control to 40 (an arbitrary figure that can be
changed to accommodate the patient's breathing pattern).
Advise the patient to breathe normally. Observe breathing bags moving through the front
panel windows. Add Oxygen if necessary for patient comfort.
4 PULMONEX II DOUBLE TRAP XENON SYSTEM