GoodKnight 425 ST BiLevel - DISCONTINUED


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  • For Reference:Discontinued 10.01.2009
  • Brand:Puritan Bennett
  • Part Numbers:Y-GK425ST-NA

The GoodKnight 425ST Bi-Level Device offers an amazingly small, compact, and quiet choice in treating obstructive sleep apnea for people who require bi-level positive pressure. As the world’s smallest, lightest bi-level device, the GoodKnight 425ST won’t crowd the nightstand and is easy to pack for travel, making obstructive sleep apnea (OSA) therapy a snap.

The GoodKnight 425ST device provides the added benefit of a backup rate that delivers a machine-triggered breath in the event of apnea or hypopnea.


  • Ultra-quiet operation, adjustable ramp time, a wide presure range, and durable construction all mean that the GoodKnight 425ST will provide OSA patients many nights or restful sleep -- now and for years to come.
  • Small and convenient (Under 2 pounds)
  • Ultra-quiet operation (Maximum sound level at 10cm H2O = 31 dBA)
  • Wide pressure range (3 to 25 cm H20)
  • Adjustable Ramp Time (0 to 30 minutes in 5-minute increments)
  • Durable construction
  • Universal Power Supply - Automatic voltage regulator and international power supply for operation on AC currents from 110 to 240 without adjustments. (Plug adapter may be needed for operation outside of the United States.)
  • Automatic leak and altitude compensation
  • Hour and compliance meters help track compliance
  • Adjustable Backup Rate (0 or 4-25bpm)
  • FlowSens Technology - The GoodKnight 425ST incorporates Puritan Bennett's patented FlowSens technology which helps optimize breathing comfort to reduce the sensation of exhaling against incoming flow


  • For Reference:Discontinued 10.01.2009
  • Manufacturer:Puritan Bennett
  • Part Numbers:Y-GK425ST-NA
  • In The Package:GoodKnight 425ST BiLevel Machine, Starter Filter, Durable Nylon Carrying Case, 6 Foot Patient Tube, Printed Manuals, Power Cord (For US Power Supply), 2 Year Manufacturer's Warranty. Heated Humidifier also included depending on package selected.
  • HCPCS Codes:E0472
  • FSA Eligible:Can be purchased with FSA Cards
Dimensions & Weight
  • BiLevel = 5.6" x 2.9" x 7.7" (142mm x 75mm x 195mm)
  • BiLevel = 1.68 lbs (760 g)
  • BiLevel with Humidifier = 6.7" x 3.7" x 11" (170mm x 95mm x 280mm)
  • BiLevel with Humidifier = 3.3 lbs (1497 g)

  • Pressure Range = 3cm to 25cm H20 (±1 cm H20)
  • Minimum Pressure Levels = 3cm IPAP, 3cm EPAP
  • Maximum Pressure Levels = 25cm IPAP, 20cm EPSP
  • Adjustable Backup Rate = 0 or 4-25bpm
  • Pressure Adjustment = 0.5cm H20
  • Power Consumption = 20 VA
  • Universal Power Supply = Input Range 100-240 V, 50-60 Hz
  • Ramp Time = 0 to 30 minutes (5-min increments)
  • Ramp Start Pressure = 3 to IPAP Pressure
  • Altitude Compenstation = 0 to 7,874ft/2400m
  • Minimum Sound Level = 25.1 dBA
  • Maximum Sound Level = 31 dBA at 10cm H20