terminology

​

Arterial Blood Gas

Airway pressure Release Ventilation

Adaptive Support Ventilation
Available on Hamilton(TM) ventilators

Total asynchrony events / total breaths * 100

Broncho-Alveolar Lavage

Basic metabolic rate

Bicarbonate

Conventional Mechanical Ventilation

Continuous Positive Airway Pressure

Chest X-Ray

Chloride

Terminating a breath

Oxygen Delivery
DO2 = CO x SaO2 x Hb + (paO2 x 0.03)

Elastance = 1/C = ∆P/∆V

End-Expiratory Lung Volume

Endotracheal Tube

​

Forced Expiratory Volume in the first second

Fraction of Inspired Oxygen

​

High Frequency Oscillatory Ventilation

Hemoglobin

​

Inspiratory Capacity

Intermittent Positive Pressure Ventilation

Inspiratory Reserve Volume

​

​

Left Ventricle

Left Ventricular Outflow Tract

Mean Airway Pressure = Area under the pressure curve

Non-Anion Gap Metabolic Acidosis

Sodium. Dialy requirement 3-4mmol/kg

Oxygenation Index = (MAPxFiO2)/paO2

​

Patient Induced Self-Inflicted Lung Injury

Pressure Control

Intrinsic PEEP = Auto-PEEP

Pressure Rate Product = PRP = pressure x respiratory rate

Pressure Time Product = PTP = Pavg × Ti = Average pressure during inspiration x Inspiratory time

Alveolar Pressure

Airway Pressure

Trans Chestwall pressure

Pleural Pressure

​

Pulmonary to systemic perfusion ratio.
Qp/Qs = (SaO2 - ScvO2) / SpvO2 - SpaO2)

Resistance [cmH2O/l/sec]
R=U/I

Recruitment Manouvre

Respiratory Rate

Right Ventricle

Total reverse triggering events / total breaths * 100

Spontaneous / Timed Mode

Synchronised Intermittent Mandatory Ventilation

Arterial Oxygen Saturation

Perfused but not ventilated part of the lung in which V is 0 and P is present. V/Q Ratio is therefore 0.

Equivalent to Transpulmonary Pressure

​

Trans-Pulmonary Pressure
TPP=Palv-Ppl

Expiratory Tidal Volume

Time Constant [sec]
𝜏 = C x R

Inspiratory Time [sec]

​

Ventilator Associated Event

Vital Capacity

Ventilator Induced Lung Injury

Volume Support

​

​

​

End-Tidal CO2

Arterial Cardon Dioxide Partial Pressure [mmHg]

Frequency OR Respiratory Rate

Assist Control

Acute Lung Injury

Acute Respiratory Distress Syndrome

Abdominal X-Ray

​

Base Excess

Bilevel Positive Airway Pressure

​

Cardiac Output

Continuous Spontaneous Ventilation

Dynamic Compliance.
Measured while gases are flowing.
C=dV/dP

Static Compliance. Measured while no gases flowing.
C=dV/dP

​

​

Energy Expenditure

Expiratory Reserve Volume

Elastance = 1/C = ∆P/∆V

Forced Expiratory Volume

Functional Residual Capacity
The lung volume after a normal expiration.

​

High Anion Gap Metabolic Acidosis

Heat and moisture exchange humidifier

Helium-Oxygen mix with low density

Flow [l/sec or l/min]
I=U/R

Intermittent Mandatory Ventilation

Inverse Ratio Ventilation

​

Potassium. Daily requirement 1-2mmol/kg

Low Cardiac output Syndrome

Left Ventricular End Diastolic Pressure

​

​

inhaled nitric oxide

​

Oxygenation Saturation Index = (MAPxFiO2)/SpO2

Power = Work/time = W/t

paO2/FiO2 Ratio.
Mild ARDS 200-300
Moderate ARDS 100-200
Severe ARDS <100

Positive End Expiratory Pressure

Peak Inspiratory Pressure [cmH2O]

Pressure Support

Pulmonary Vascular Resistance

Alveolar Pressure

Pressure at Body Surface

Esophageal Pressure. Measured with oesophageal balloon

Plateau Pressure [cmH2O]
Only available in Volume Controlled Ventilation
Represents alveolar pressure

Pulmonary Blood Flow

Systemic Blood Flow

​

Respiratory Quotient (CO2 produced per O2 consumed)
Carbohydrates only: 1.0
Fat only: 0.7
Protein only: 0.8
Balanced Diet: 0.82

Residual Volume

Airway Resistance

​

Stress Index

Systemic Vascular Resistance

Mixed Venous Oxygen Saturation

Transcutaneous Oxygen Saturation

Venous Oxygen Saturation

Total Lung Capacity

Tidal Volume = Volume per breath

Inspiratory Tidal Volume

Expiratory Time [sec]

​

Ventilation / Perfusion Mismatch

Ventilator-Associated Pneumonia

Volume Control

Oxygen Consumption
Dependant on Energy Expenditure (EE):
- Body Temperature
- Muscle Activity
- Level of consciousness

Dead Space

Work of Breathing

​

Pressure Gradient

Paediatric Acute Respiratory Distress Syndrome

Arterial Oxygen Partial Pressure [mmHg]