| Patient Inputs | ||
|---|---|---|
| Parameter | Value | Unit |
| Height | ||
| Weight | ||
| Gender | ||
| Tidal Volume Selection (ml/kg IBW) | |||
|---|---|---|---|
|
mL
|
mL
|
mL
|
mL
|
| Predicted Ventilator Settings | ||
|---|---|---|
| Parameter Name | Value | Unit |
| BSA | 0.00 | m2 |
| Minute Ventilation | 0.00 | L/min |
| Respiratory Rate | 0.00 | breaths/min |
Used to calculate predicted Tidal Volume based on patient Height and Gender (Height >= 60 in):
$$ \text{IBW (kg)} = \begin{cases} 50 + 2.3 \times (\text{Height (in)} - 60) & \text{for Males} \\ 45.5 + 2.3 \times (\text{Height (in)} - 60) & \text{for Females} \end{cases} $$Note: When patient height is less than 60 in, a generic formula not gender reliant is utilized.
$$\text{IBW (kg)} = 50 - (0.9 \times (60 - \text{Height(in)}))$$Calculated using the Mosteller Formula, where height is in cm and weight is in kg:
$$ \text{BSA (m}^2) = \sqrt{\frac{\text{Height (cm)} \times \text{Weight (kg)}}{3600}} $$Calculated using gender-specific factors based on BSA:
$$ \text{MV (L/min)} = \text{BSA} \times \begin{cases} 4.0 & \text{for Males} \\ 3.5 & \text{for Females} \end{cases} $$Calculated by dividing the predicted minute ventilation by the selected tidal volume (converted to Liters):
$$ \text{RR} = \frac{\text{Predicted MV (L/min)}}{\text{Tidal Volume (L)}} $$| Adjustment 1: Respiratory Rate (RR) | ||
|---|---|---|
| Current RR (breaths/min) | Current PaCO2 (mmHg) | Desired PaCO2 (mmHg) |
| Adjusted RR | 0.00 | |
Calculated using the relationship between minute ventilation and PaCO2 (V̇E × PaCO2 = constant). This formula adjusts the respiratory rate to achieve a desired PaCO2 level, assuming tidal volume is held constant.
$$ \text{RR}_{\text{adj}} = \frac{\text{RR}_{\text{curr}} \times \text{PaCO}_{\text{2\_curr}}}{\text{PaCO}_{\text{2\_des}}} $$| Adjustment 2: Tidal Volume (TV) | ||||
|---|---|---|---|---|
| Current TV | Current PaCO2 (mmHg) | Desired PaCO2 (mmHg) | ||
| Adjusted TV | 0.00 | |||
Calculated using the relationship between minute ventilation and PaCO2 (V̇E × PaCO2 = constant). This formula adjusts the tidal volume to achieve a desired PaCO2 level, assuming respiratory rate is held constant.
Note: Input and output units (Liters or mL) are handled by the calculator's JavaScript before and after applying the formula.
$$ \text{TV}_{\text{adj}} = \frac{\text{TV}_{\text{curr}} \times \text{PaCO}_{\text{2\_curr}}}{\text{PaCO}_{\text{2\_des}}} $$