GUIDELINES FOR ANY VENTILATOR PROTOTYPE

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  • 22/04/2020 Create Date
  • 22/04/2020 Last Updated

  1. PHYSICAL PROPERTIES.
    a). Able to operate at temperatures ranging from 14* to 50* centigrade and for at least 24 hours a day
    continuously for at least 14 days.
    b). Able to operate reliably at sea level up to 2500m above sea level
    c). Robust, compact, easy to clean (disinfect) and hardy
    d). Have an inbuilt oxygen concentrator as well as the ability to connect to an external oxygen source.
    e). Able to work off a 240 voltage power supply
    f). A rechargeable battery with a long life exceeding 15 hours
    g) Standard ventilator tubing attachment points. An arm supporting the weight of these tubing is necessary
    but not mandatory.
    h). an oxygen sensor (fuel cell) on the inspiratory limb of the ventilator tubing.
    i). Impermeable exterior surface
  2. VENTILATORY INDICES TO BE SET, MEASURED, AND ADJUSTED
    a). Tidal volume (inspired {which is set by the operator} and expired)
    b). Airway pressure: maximum of 40 cmH2O with a relief valve if exceeds 60cm H20
    c). Flow rate
    d). Oxygen concentration delivered to the patient
    e) Adjustable Inspiration and expiration times (this can give an I: E ratio as discussed yesterday) as well as
    inspiratory pause: ratios available should be at least1:1, 1:2, 1:3, 1:4, 2:1, 3:1.
    f) Rate of breaths delivered per minute (4-60 breaths per minute)
    g). Inspiratory trigger setting from -1 to -3cm of water (can also be flow sensor set)
    h) PEEP (positive end-expiratory pressure) ranging from 1 to 20 cm of water
  3. VENTILATORY MODES
    a) Volume control ventilation (synchronized to patient trigger effort and also mandatory controlled
    ventilation)
    b) Pressure control ventilation
    c) Pressure support ventilation (synchronized to patient effort or mandatory)
    d) Continuous positive airway pressure e) WOULD BE GOOD TO HAVE BIPAP BUT NOT MANDATORY.
  4. MANDATORY ALARMS (MUST BE AUDIBLE AT OVER TWO METERS AWAY)
    a). Low oxygen concentration of 21% or below
    b). Respiratory rate from below 4 breaths per minute or above 60 breaths per minute
    c). Airway pressures below 10cm of water and above 30cm of water
    d). Low battery with a time of an hour before exhaustion.
  5. INFECTION CONTROL
    a). Impermeable exterior
    b) Able to overcome HMEF pressure (usually 1-2 cm H2O)
    c) All parts coming into contact with the patient must be able to be disinfected or be disposable
  6. INCOMING GAS SUPPLY
    a). Incoming gas supply of 6-10 liters per minute (pipeline, cylinder or concentrators as sources have this
    range)


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