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Volume Controlled
Harvard Large Animal Model 613 Single Animal Volume Controlled Ventilators
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Harvard Large Animal Model 613 Single Animal Volume Controlled Ventilators
The Harvard Large Animal Volume Controlled Ventilator is suitable for ventilating a single animal from 1.5 to 50 kg. It has adjustable tidal volume from 30 to 700 ml/stroke and an adjustable respiratory rate from 7 to 50 breaths/minute. The I:E ratio may be adjusted from 25 to 55% of the respiratory cycle while the ventilator is running.
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• For animals from 1.5 to 50 kg (3.3 to 110 lb) in weight
• Volume adjustable from 30 to 750 cc/stroke
• Variable Inspiratory: Expiratory Ratio
This is the workhorse of the Harvard Apparatus Volume Controlled Ventilators. There are literally thousands of these Ventilators in use in leading research laboratories throughout the world. Their design has been essentially unchanged over the years. There are dozens of examples of these Ventilators giving continuous service for more than thirty years with proper care and maintenance.
Note that the volume adjustment is made on the piston shaft, and that therefore accurate volume adjustment cannot be made while the ventilator is running. However, the rate and the I:E % can be varied while the ventilator is running. Air/gas valving is by the four port system with separate ports for gas inlet, gas outlet (to animal), gas return (from animal), and ventilator exhaust.
The gas inlet can be used to supply air or any non-flammable gas supply. Like the other Harvard mechanical ventilators, attachment of the ventilator exhaust to a column of water can be used to produce a positive and expiratory pressure (PEEP).
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