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If a patient has smoked 2 packs of cigarettes daily for the past 35 years, what would their pack year history be?ġ9. An E cylinder is at 1,400 psi, and the flow rate is 2.5 L/min. How long will the cylinder last in minutes and in hours?ġ7.
Cmh2o peep definition full#
An H cylinder is half full (full = 2,200), and the patient is receiving oxygen via nasal cannula at 3 L/min. What is the formula for combined gas law?ġ6. What is the formula for Charles’s law?ġ5. What is the patient’s VD/VT if their PaCO2 is 58 mmHg with a mixed expired CO2 of 32 mmHg?ġ4. What is the patient’s VD/VT if their PaCO2 is 40 mmHg with a mixed expired CO2 of 28 mm Hg?ġ2. What is the formula for deadspace/tidal volume ratio?ġ1. What is the formula for alveolar partial pressure of carbon dioxide (PACO2)?ġ0. What is normal carbon dioxide production?ĩ. This value can be obtained by dividing the patient’s tidal volume by what?Ĩ. The doctor has requested the static compliance measurement for an adult patient who is receiving mechanical ventilation. This value can be obtained by dividing the patient’s tidal volume by what?ħ. The physician has requested the dynamic compliance measurement for an adult patient who is receiving mechanical ventilation. After obtaining a patient’s PFT results, they have a VC of 3.4, FRC of 5.8, and an ERV of 1.2. The A-a gradient is usually around 10 mmHg.ĥ. What is the normal value of the A-a gradient? The A-a gradient is the alveolar-arterial oxygen gradient and represents the driving force of oxygen from the alveolar sac into the artery.Ĥ. What is the A-a gradient, and why is it significant?
What is the patient’s airway resistance?ģ. The ventilator flow rate is set at 60 L/min. A patient receiving mechanical ventilation has a PIP of 60 cmH2O and a plateau pressure of 45 cmH2O. Minimum Flow Rate in Mechanical Ventilationįlow Rate = Minute Ventilation x I:E Ratio Sum of PartsĢ. PSV = ((Peak Pressure – Plateau Pressure) / Set Flow) x Peak Flow Pressure Support Ventilator Setting (PSV) IBW = 50 kg + (2 x Number of Inches over 5 feet) Pack Years = (Packs Smoked per Day) x (Number of Years Smoked)Ĭatheter Size = (Internal Diameter / 2) x 3Įndotracheal Tube Size Estimation in ChildrenĬelsius to Fahrenheit Temperature Conversionįahrenheit to Celsius Temperature ConversionĬelsius to Kelvins Temperature Conversion Infant or Child Dose = (Age in Months / 150) x Adult DoseīSA = ((4 x Body Weight) + 7) / (Body Weight + 90)Įlastance = Change in Pressure / Change in Volume Infant and Children Dosage Estimation (Fried’s Rule) Infant Dose = (Body Weight in lbs / 150) x Adult Dose PVR = (MPAP – PCWP) x (80 / Cardiac Output)Ĭst = Tidal Volume / (Plateau Pressure – PEEP)Ĭdyn = Tidal Volume / (Peak Pressure – PEEP)Ĭhild Dose = (Age / Age + 12) x Adult Dose SVR = (MAP – CVP) x (80 / Cardiac Output) HR = 300 / # of large boxes between R waves MAP = (Systolic BP + (2 x Diastolic BP)) / 3 QS/QT = ((PAO2 – PaO2) x 0.003) / ((CaO2 – CvO2) + (PAO2 – PaO2) x 0.003)Īrterial-Mixed Venous Oxygen Content Difference (C(a-v)O2)Īrterial Oxygen Saturation Estimation (SaO2)ĭuration = (Gauge Pressure x Tank Factor) / Liter FlowĬPP = Mean Arterial Pressure – Intracranial Pressure
WOB = Change in Pressure x Change in VolumeĪlveolar-Arterial Oxygen Tension Gradient (P(A-a)O2) Paw = ((Inspiratory Time x Frequency) / 60) x (PIP – PEEP) + PEEP VA = Respiratory Rate x (Tidal Volume – Deadspace)
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