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PR System One REMstar Auto A-Flex with SD Card - DS550S

PR System One REMstar Auto A-Flex with SD Card - DS550S
PR System One REMstar Auto A-Flex with SD Card - DS550S
Item #: DS550S
This product is no longer available. Information is for reference purposes only. Replaced with newer model: PR System One REMStar 60 Series Auto CPAP Machine with Heated Humidifier and Heated Tube 
The PR "System One" REMstar Auto with A-FLEX, introduced by Respironics, brings sleep therapy up to a new level.  A-Flex works hand in hand with Respironics Auto algorithm to give patients the utmost comfort with breathing that feels as natural as possible. Just like Respironics proven C-Flex technology, A-Flex will decrease pressure during exhalation. It will also lessen the pressure during the transition from inhalation to exhalation, just like Bi-Flex. This wonder machine will track and adjust breathing throughout the night, giving patients a wonderful combination of therapy plus a great nights sleep.

This Product Includes:

  • PR "System One" REMstar Auto with A-FLEX CPAP Machine
  • Carrying Case
  • 6 Foot Performance Tubing
  • Power Supply and Cord
  • Reusable Foam Filter (2)
  • Patient Manual
  • Clinical Quick Setup Guide
  • SD Memory Card 
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System One PRCPAP Pro Machine Features:

  • The PR Flex Technology was designed with one thing in mind. To make breathing through a CPAP/BIPAP Machine feel as natural as possible. By monitoring each breath, the machine can deliver pressure relief during the three most important points of the breathing cycle. During transition from exhalation to inhalation, inhalation to exhalation, and during the actual exhalation. In this way it can maintain effective therapy at comfortable pressures. A-Flex is a comfort feature built on top of the REMstar Auto algorithm. If breathing events occur, the algorithm raises the A-Flex pressuretoget rid of thebreathing event, and at the same time making sure that pressures never rise to a level that's unnecessarily or uncomfortably high.
  • The System One Resistance Control allows the patient to choose what kind of mask best suits them and still recieve optimal flow. So whether you choose to wear a nasal, full face, or nasal pillow mask, the machine will automatically make the appropriate adjustments to ensure that the patient recieves full therapy.
  • System One Humidity Control (Optional) -The PR CPAP humidifier has special sensors that monitor the changes in temperature in the tube, and adjust it accordingly. This way, all problems of rain-out are eliminated. With the Dry Box technology, chances of water damage are once again greatly reduced. Since The air outlet port was moved to the topof the humidifier, and the water chamber was outfitted with a one-way valve between the machine and the humidifier, it makes the machine truly leak free.
  • Data Management and Reporting- PR system One Machines now use Generic SD Memory Cards to record sleep Data. It is no longer necessary to use a specialized card reader when uploading information fromthe machine to a computer. Any SD card reader willallow you to upload.

Pressure Range:

4 - 20 cm H20

Ramp Time:

0 to 45 minutes (in 5 min increments)

Start Ramp Pressure:

From 4 cm to prescribed pressure


Without humidifier: 7.5" x 5.5" x 4"; With humidifier: 7.5" x

Data Storage Content:

7 and 30 day averages


Without humidifier = 3 pounds; With humidifier = 4.2 pounds

Exhalation Relief:



2 pollen filters

Data Storage Content:

SD Card = Total therapy hours; Total blower hours

Altitude Settings:

Low, Medium, or High

Compliance Meter:

Breathing Detection

Electrical Requirements:

100 - 240 VAC, 50/60 Hz

Sound Level:

<30 dba


2 Year Manufacturer Warranty

Average Ratings:

"Respironics mask fit feature is just the greatest thing. I've got a couple of masks and i enjoy switching on and off every couple of nights. by setting this excellent feature the system one machine will set the machine so that i recieve the best therapy to match that mask. i think its brilliant. Thank you!!!"

Ronny S, Spring Valley NY



Manufacturer's Note: Philips Respironics recommends that new patients purchase their devices, masks and initial accessories from a homecare company that can provide an individualized patient equipment set-up, clinical and after-sales support, and a program to assist patients with therapy success. We are only authorized to sell and ship Philips Respironics products to end-users residing in the United States.

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