SIMV + PRESSURE SUPPORT
During the SIMV period, if the patient triggers the PC900, a synchronized breathe will be provided as per the set Peak Inspiratory Pressure & the Inspiration time. The patient is allowed to breathe spontaneously through the “BIAS FLOW” in spontaneous period. If during the spontaneous period, the patient Triggers the PC900, a Demand Valve of a specially incorporated “Reservoir Bag” opens and a “Pressure Support Breathe” is provided to the patient with a preset pressure above PEEP. This avoids unnecessary high Peak Airway Pressure, & also provides support to the patient’s spontaneous breathe. The number of Pressure Support Breathes in the spontaneous period depends upon the patients breathing effort. Patient Triggered Ventilation (PTV MODE) The benefit of this mode is that patients each in spiratory effort is augmented (supported) by the PC900. This allows patient to determine his own frequency & I:E Ratio. A back up ventilation rate is automatically set by the Micro controller once the Apnea Delay time is set. Patient Triggered Ventilation supports spontaneous breathing in an unique and harmonious way and is thus predestined to become the ventilation mode best suited to weaning patients off the ventilator. Clinical studies have shown that patients treated with P.T.V. were weaned more rapidly and had a significantly shorter mean time to extubation. Provision of Bias Flow to provide ready gas of set FIO2 during patient triggering. This helps in reducing the fatigue to the patient and improves the overall sensitivity of the PC900. It also helps in washing out the CO2 in more effective manner. The Bias Flow can be set from 0.8 to 33.3 ml per second. The Air Oxygen Blender is an proportionating device that adjusts the flow of air and oxygen automatically and delivers the set Fio2 accurately. A crisp and clear digital Bar graph precisely indicates the actual pressure delivered to patient along with set PEEP, and the set Trigger level. A color coding is used for the Bar Graph that indicates the Low, Medium, and High pressure zones by corresponding Green, yellow, and Red LEDs. The Bar graph automatically indicates the amount of pressure that the patient has to create to trigger a breathe, once the Trigger level is set. A LCD display guides the user in setting various parameters of a selected mode. It also indicates various malfunctions and messages like “low airway pressure, high airway pressure, patient in Apnea, mean airway pressure, Inspiratory pause, sigh breath, spontaneous and SIMV time period in SIMV mode, Bias Flow on, mode ready, press start, etc.
A respective LED on each mode key constantly indicates the selected mode of PC900. The user can always shift the mode and can also change the parameters “ONLINE” to enhance his efficacy and patients comfort.
The SIMV% can be set from 60, 65, 70, 75% of the respiratory cycle in SIMV mode. This informs the user regarding the window time of SIMV and spontaneous period. An unique and easily removable humidifier is incorporated to warm and humidify the blended gas that is delivered to patient. A special adjustable temperature control mechanism is provided to warm the gas to set temperature.