biodex PULMONEX II Operation Manual page 15

"From Patient" Bag
Oxygen Inlet Port
Figure 8.
NOTE: Patients with a large lung capacity or breathing faster will require a higher patient
air flow speed (i.e.: 50) or higher. Do not make it too high or the patient will not be able to
inhale.
NOTE: If the xenon is not getting to the patient for single breath, on future studies lower
the "Patient Air Flow" control to 10 or 20 for approximately five seconds before xenon
administration. Instruct the patient to exhale and add the xenon while the patient inhales.
13. Once the patient reaches equilibrium (one to two minutes, the counting rate on the camera
stabilizes), switch to "Washout," position #3. Turn the Trap Air Flow Control to 50 about 10
seconds before going to Washout. Take washout data on the camera (typical framing: first
image, 15 seconds; second, 30 seconds; third, 60 seconds). Have the patient breathe normally.
14. Carefully watch the "From Patient" bag. if it starts blowing up, the patient is breathing too
fast. Advise normalized breathing and increase the "patient air Flow" speed. If the bag con-
tinues to expand up towards the glass, the patient will feel back pressure and resistance.
to relieve this effect, increase "Trap Air Flow" by turning the Trap Flow knob clockwise until
the breathing bag deflates. Return the control to approximately one-half of its range when
the study is complete. The use of this trap motor control will be a rare occurrence. Do not
adjust unless absolutely necessary and be sure to return it to its original position. To be
effective, the increase in motor speed must be accomplished before the bag is full, thus, it
is vital to watch the "From Patient" bag carefully during washout.
NOTE: If the motors are running too fast it may be difficult for the patient to breathe in.
15. When the washout is complete, remove the patient from the system. Allow the system to
run for a few more seconds or until both bags are empty.
PULMONEX II DOUBLE TRAP XENON SYSTEM
Master Control Handle
Patient Air Flow Minute Timer
"To Patient" Bag
Trap Air Flow
5