Datex-Ohmeda 885

The Datex-Ohmeda 885 was designed to support military medical personnel in administering sedatives under field conditions. The necessity arose from the fact that devices used for this purpose must be properly suited to endure harsh environments that are likely to expose medical equipment to weather conditions, dust, and rough handling during transport.

Since its approval by the Pentagon in 1978, it has been deployed by the medical units of multiple branches of the US Military, including during the war in the Persian Gulf and in Bosnia in the 1990s. Some non-war uses were for anesthetist training and occasionally delivering anesthesia in remote locations where modern machines were inaccessible.

The combined weight of the device and container is 115 lbs. It is self contained in a case that measures 13" x 20" x 18" when closed, and 13" x 20" x 44 when fully erected. The Army green case is separated into two sections, the upper and lower case. The upper case contains hoses and other parts essential to the functions of the apparatus that promote breathing; it can also be deployed as a stool for the anesthetist, and houses tools used to maintain the device. The lower case can be fitted with glides or casters to make it easier to move. It is also where the stand, control head, absorber, vaporizer, cylinder adapters, and other necessary items are stored.

Can be found on page 2 of the instructions manual

• Units not currently in use should be inspected at 30 month intervals.
• Preventative maintenance should be performed on in service units on a quarterly basis.
• Units with oxygen monitor sensors should be inspected annually.

The Ohmeda 885 was manufactured by Instrumentarium. According to the Milwaukee Business Journal, Instrumentarium was purchased by GE Healthcare in 2003 in an effort to integrate the respective companies’ anesthesia and patient monitoring capabilities.

With its analog dials and gauges, the 885 is easy to identify as a more primitive machine when compared to its contemporaries of today that boast digital screens and more sophisticated monitoring capabilities.

• Closed Carrying Case Dimensions: 13” wide, 20" long, 18” high (4680 cubic inches)
• Weight in shipping container: 115 lbs.
• Weight without shipping container: 86 lbs.
• Vaporizer Liquid Anesthetic Agent Capacity: maximum, 250 mL Vaporizer
• Thermometer: O to 50°C range with + 1°C accuracy
• Breathing Circuit Pressure Range: dual calibrated from —10 to 70 mm Hg and -20 to +100 cm H,0 with +0.5 mm Hg accuracy
• Oxygen Flush Valve: depressing pushbutton allows a minimum oxygen flow of 40 LPM
• Regulator Outlet Pressure Setting: 40 psig nominal
• Pressure Sensor Shutoff Valve: shuts off nitrous oxide flow when pressure of oxygen in the circuit drops to approximately 20 psig
• Gas Evacuator/Relief Valve: range 2 to 70 mm Hg
• Non-Adjustable Relief Valve: opens between 60 and 80 mm Hg
• Absorber Canister: holds 2.5 — 3 lbs. of soda lime (bulk or prepackaged)
• Oxygen Cylinder Regulator Assembly: 40 psig regulator; gauge is calibrated from 0 to 3000 psi; white with green symbol coded tee handle
• Nitrous Oxide Cylinder Regulator Assembly: 40 psig regulator; gauge is calibrated from 0 to 3000 psi; blue with white symbol coded tee handle
• Gas Supply Hoses: 一 two 114” long hoses, two 40” long hoses; all supply hoses have color coded identification disc, oxygen discs are white with silver characters; nitrous oxide discs are blue with silver characters
• Case Relief Valve: nominal relief pressure rating of 1.6 psig
• 885A Anesthesia Apparatus Environmental Characteristics Operating Temperature: +5°C to + 40°C (41°F to 104°F) Storage Temperature : -28°C to +54°C (-20°F to 130°F) Long Term Storage Temperature: -28°C to +54°C (-20 to 130°F) Note: To maximize the oxygen monitor sensor's shelf life, when refrigeration is not available (as noted in the 5120 Oxygen Monitor Operation and Maintenance Manual Ohmeda Stock No. 0178-1757-000) the sensor should be stored in a clean and dry environment at: Temperature: +20°C (68°F) +2°C Humidity: 55% + 5%
• 5120 Oxygen Monitor Characteristics: Operating Temperature Range: +5°C to + 40°C (41°F to 104°F) Temperature Compensation Range: +15°C to + 40°C (59°F to 104°F) Sensor Life: 12 months, typical; assumes average % O, equal to 50% at +25°C (+77°F).

• Flowmeters
  • Range
    • Nitrous Oxide: 0.2 to 8 LPM
    • Oxygen for Vaporizer
      • Low Flow: 20 to 180 cc/min
      • High Flow: 100 to 1000 cc/min
    • Metabolic Oxygen: 0.2 to 7 LPM
  • Accuracy
    • The accuracy of all flowmeters is +/-20% up to flows of 1000 cc/min and +/-10% above flows of 1000 cc/min.
  • Color of Scale
    • Nitrous Oxide: Blue background w/ white characters
    • Oxygen for Vaporizer: Yellow background w/ black characters
    • Metabolic Oxygen: White background w/ green characters
  • Color of Flow Control Knob
    • Nitrous Oxide: Blue background w/ silver characters
    • Oxygen for Vaporizer: Black background w/ white characters
    • Metabolic Oxygen: White background w/ silver characters

Source: Device Manual

Device setup for use

Military Medicine Article, 1997

Additional photos of the Ohmeda 885

GE Healthcare acquired Instrumentarium’s Datex Ohmeda division in 2003

GE Healthcare’s Anesthesia machine product line

Device Image Source