| Parameter | Value | Resolution |
|---|---|---|
| Frequency (BPM) | Variable, from 6 to 60 BPM | |
| Inspiratory time (sec) | 0.5 to 3 | 0.5 |
| Expiratory time (sec) | 0.5 to 3 | 0.5 |
| I:E ratio | 1:6 to 6:1 (for critical care ventilators) | |
| Inspiratory peak pressure limit (cm H2O) | -50 cm H2O | 1 |
| Inspiratory pause/plateau time (sec) | 0.5 to 3 sec | 0.5 |
| Expiratory Pressure (cm H2O) | Variable, from +5 to -25cmH2O | 1 |
| NEEP pressure range (cm H2O) | -1 to -10 cm H2O | 1 |
| Intermittent Mandatory Ventilation Frequency (BPM) | 6 to12 | 1 |
| IMV waiting time (sec) | 3 | 0.5 |
| Sigh frequency (BPM) | 1-20 times/hour | 1 |
| Sigh pressure (cm H2O) | -30 to -50 cm H2O | 1 |
| Available Modes | Controlled Ventilation, Assisted controlled ventilation, CNEP, NEEP, Assisted with plateau, Assisted ventilation | |
| Available Waveforms | Pressure waveforms | |
| Available Controls : Pressure | +5 cm H2O to -50 cm H2O | |
| Fail safe mechanisms | Alarms for power failure, mechanical failure, high/low respiratory pressure, low oxygen saturation levels | |
| Back up ventilation parameters | If no inspiration initiated for 3 seconds | |
| Pressure monitoring | Pressure transducers (range from -203 to 203 cmH2O) | 0.1 |
| Parameters | Sensing Mechanisms | Detection Ranges | Associated alarming capabilities |
|---|---|---|---|
|
Pressure in Cuirass (would measure proper working based on set parameter, high/low pressure, mechanicalfailure, power failure) |
Pressure transducers |
-25 to 25kpascals (-203 to 203 cmH2O) |
Automated phone call alert Sound alarm |
|
Respiratory Capacitive Plethysmography Respiratory effort initiation by patient (also measures: • Respiratory rate • Tidal volume • Minute ventilation • Peak inspiratory and expiratory flow) |
Sensors on bands across chest and abdomen |
Upto 20mm diameter stretch Accuracy |
Automated phone call alert Sound alarm |
| Mode | Details |
|---|---|
| Controlled Ventilation |
• Trigger: preset time trigger by ventilator • Control: preset negative pressure controlled • Limits: Insp. pressure = 0 to -50 cm H2O, Exp. pressure = +5 cm H2O to -25cm H2O • Cycle variables: negative pressure/time cycled |
| Assisted Controlled Ventilation |
• Trigger: patient respiratory effort (negative pressure of -1cm H2O/chest and abdomen girth increase /time trigger by ventilator • Control: preset negative pressure controlled • Limits: Insp. pressure = 0 to -50 cm H2O, Exp. pressure = +5 cm H2O to -25cm H2O • Cycle variable: Negative Pressure/ time-cycled |
| (CNEP) - Continuous Negative Pressure Ventilation, (~CPAP mode) |
• Trigger: preset negative Pressure/patient respiratory effort • Control: preset negative pressure controlled • Limits: -1 to -10 cm H2O • Cycle variables: continuous |
| (NEEP) - Negative Pressure/Negative end expiratory pressure (~ PPV with applied PEEP) |
• Trigger: patient respiratory effort/time trigger by ventilator • Control: preset negative pressure controlled • Limits: Insp. pressure = 0 to -50 cm H2O, Exp. pressure = -5 cm H2O to -25cm H2O • Cycle variables: Negative Pressure/ time-cycled |
| Assisted with Plateau |
• Trigger: patient respiratory effort • Control: preset negative pressure controlled • Limits: Insp. pressure = 0 to -50 cm H2O, Exp. pressure = +5 cm H2O to -25cm H2O • Cycle variables for each mode: Negative Pressure/ time-cycled |
| Assisted Ventilation |
• Trigger: patient respiratory effort • Control: preset negative pressure controlled • Limits: Insp. pressure = 0 to -50 cm H2O, Exp. pressure = +5 cm H2O to -25cm H2O • Cycle variables for each mode: Negative Pressure |
Other modes include: Cough Assist mode, Breath Training mode, Positive Pressure mode
Back-up respiratory rate of 6-12 breaths/min, triggered if no respiratory effort for 3 seconds after expiration