About DW
Respiratory Therapist
lungs representing deadspace ventilation
Calculations

Vd/Vt

0

The Vd/Vt indicates how much of the tidal volume is composed of deadspace. This is important to monitor because increases in deadspace reduce gas exchange and increase the patient’s work of breathing. Vd/Vt = PaCO2-PECO2/PaCO2 […]

oxygen pressure
RRT Exam Prep

A-a Gradient

0

The A-a gradient compares the pressure of oxygen in the alveoli (PAO2) to the pressure of oxygen in the arteries (PaO2). This pressure difference should range between 5 and 10 mm Hg in a healthy […]

carbohydrates, protein, fats
Calculations

Respiratory Quotient

0

What is the respiratory quotient? The respiratory quotient (RQ) is the ratio of carbon dioxide produced to oxygen consumed. This is based primarily on the patient’s diet. A diet high in lipids has an RQ […]

Oxygen masks
Calculations

PaO2/FiO2 Ratio

0

The PaO2/FiO2 ratio, also known as the P/F ratio, is a quick calculation often used to determine the severity of ARDS. The P/F ratio is calculated by dividing the arterial oxygen pressure (PaO2) obtained from […]

alveolar gas exchange
Calculations

Alveolar air equation

0

The alveolar air equation calculates the partial pressure of oxygen within the alveoli (PAO2). The alveolar air equation is also referred to as the alveolar gas equation. PAO2 = [(Patm – Ph2O)fio2] – [PaCO2/0.8] Why […]

Respiratory Therapy Study Guide
RRT Exam Prep

RRT Exam Practice Questions

0

Passing the NBRC RRT board exams on the first try is hard work! There, I said it. Despite the promises some exam review companies make, the reality is that passing on the first attempt is […]

RRT Exam Prep

5 Free RRT Exam Practice Questions

0

Cardiac questions abound on the new 2015 TMC-RRT and clinical simulation exams. Fortunately, you don’t have to be a cardiologist to pass! However, familiarizing yourself with cardiac signs, symptoms, ECG, hemodynamics and pathophysiology will contribute […]

Respiratory therapist exam review
RRT Exam Prep

Respiratory Therapist Exam Review

0

I recently took the paid version of the respiratory therapist exam self assessment test. After sadly parting with the $50 test fee I spent the next 2 hours answering 140 practice questions. Something I noticed was […]

1 2