Frequently Asked Questions for the DeVilbiss PulseDose

The list below of frequently asked questions and troubleshooting problems for the DeVilbiss Pulse Oxygen Conserving Device is based on information compiled from the DeVilbiss Operating Instructions manual and from our own experience.

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Are you the manufacturer of the PulseDose?
No, we are a dealer and repair service center. DeVilbiss is the manufacturer, part of the Sunrise Medical group.

Do you sell or repair the DeVilbiss PulseDose?
We both sell and repair models of the DeVilbiss PulseDose, including EX2005D, PD1000, and PD4000.

Do you take Medicare for repairs or sales of the PulseDose?
No, we are not set up to deal with Medicare or other insurance companies. We accept payment by credit card and check, and can itemize bills for you to submit to your company.

How does the PulseDose know when I am inhaling?
Your diaphragm moves down and causes pressure to drop in your lungs when you inhale. Air flows in through your nose and mouth to equalize pressure. This pressure signal travels through the nasal cannalua to a pressure sensor in the PulseDose conserving device, which tells the device to open a electrical valve and deliver a precisely measured dose of oxygen. When the valve closes, the sensor is ready to detect your next inhalation.

Am I really getting enough oxygen--the pulse seems so short!
Yes. PulseDose delivers a precise burst of oxygen at a high rate at the leading edge (beginning) of each inhalation. This means that the oxygen flows deep into your lungs--you get maximum therapeutic benefit for less oxygen, and without the need for continuous flow delivery.

If I can't hear the pulse, is the PulseDose still working?
If the pulse can't be heard, look at the green PulseDose indicator--if it is lighting up, then the device is being triggered by inhalation. Or, hold the end of the cannula in front of your lips while inhaling through your mouth and feel the pulse. Remember to check the oxygen contents gauge to verify that there is an adequate supply of oxygen. If the 02 supply runs out, the green light will continue to illuminate, because the conserving device is still being triggered by inhalation. The audible alarm will sound to indicate that there is no oxygen left in the cylinder.

Why can't I use a cannula longer than 35 feet?
The PulseDose triggering isn't significantly affected by the cannula length, but the delivery of oxygen is. If the cannula is longer than 35 feet, the oxygen pulse is delayed. If the oxygen is not delayed at the leading edge of inspiration, the therapeutic benefit will not be realized.

I've always used humidifiers with oxygen before. Should I use one with PulseDose?
No. PuleDose can't sense your inhalation through the water in the humidifier. Also, you may find that you don't need humidification, because the PulseDose improves comfort by delivering just a small amount of oxygen, and the rest of inhalation is composed of normal room air, which is less drying.

When I'm breathing faster, I don't get a pulse with each breath. Don't I need a dose every time?
Because the PulseDose breathes with the patient, it has an upper limit (40 Breaths Per Minute) to keep you from getting too much oxygen.

When I stop using my conserving device, it keeps beeping every thirty seconds.
You need to turn off the PulseDose when you are finished using it. It is beeping to remind you to turn it off so the batteries will last longer.

How can I clean and care for my PulseDose?
Clean your device by wiping it with a dry, lint-free cloth. Avoid getting debris, sand, or dirt inside the device. Avoid dropping the PulseDose or placing it in a position where it could fall. Protect your PulseDose from extreme temperatures, moisture, or dust.

My unit won't pulse! What is the problem?
Be sure the rotary selector is set to the right flow setting. Check your battery level by pressing the battery check button--it should illuminate if the batteries are still good. Take the cannula off your nose and make sure the tubing isn't kinked. Then attach the cannula to your nose again and breathe. If the unit still does not pulse, call your HME provider or send it in for repair.

One of the alarms is going off! What should I do?
Were you breathing on the unit when the alarm went off? The unit has a no-use alarm that will trigger if you haven't breathed on it after 3 minutes. It will then go off every 30 seconds until you breathe on it or turn it off.

The unit will alarm on each breath if the cylinder is closed or empty. See what the pressure gauge reads: if it reads "Empty" then change the tank. If it reads "Not Open" then be sure the tank regulator is all the way open. This is epecially important for tanks that are close to empty.

If the "Low Battery" green LED is illuminated, change the battery.

If none of the above, call your HME provider or send your PulseDose in for a repair estimate.

What are the instructions for Liter Flow Adjustment on the EX2000D and 3000D series?

Please note: patients should NOT change the liter flow adjustment. Only your homecare representative, respiratory therapist, or dealer technician should change the liter flow adjustment to fulfill your doctor's prescription.

  • Attach the conserving device (EX2000 series) to a cylinder or attach the applied tubing between the pressure regulator or liquid oxygen system and quick connect oxygen input of the conserving device (EX3000D). The cannula should NOT be attached to the conserving device until step 5 is completed.
  • Press the battery check button to turn on unit.
  • Wait until there are no lights illuminated on the conserving device, then press and hold the battery check button until the LED blinks corresponding to current liter flow. The device has been factory preset at 2 LPM.
  • Momentarily press the battery check button to increase the prescription setting. The light will step up one setting each time th ebattery check button is pressed. After reaching 6 LPM, the device will reset to the first setting of 0.5 LPM.
  • Once you have reached the desired prescription level, the device will store that setting in memory of the battery check button is not pressed for 3 seconds. The light for the new LPM setting will be constantly illuminated for an additional 3 seconds which confirms storage.
  • The PulseDose indicator will also confirm correct setting by illuminating on every inspiration at the prescribed LPM level.
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