Anesthetic Equipment: Capnography

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Questions and Answers

What is the normal range of mmHg?

25-35
35-45 (correct)
40-50
30-40

What is displayed at the end of expiration?

Blood pressure
Heart rate
Co2 levels (correct)
O2 levels

What is the primary use of the displayed value?

To monitor heart rate
To track blood pressure
To diagnose respiratory diseases (correct)
To monitor oxygen levels

What is the unit of measurement for the displayed value?

mmHg (C) Signup and view all the answers

When is the value of Co2 displayed?

At the end of expiration (B) Signup and view all the answers

What is the primary function of a capnograph?

To display a graphical representation of CO2 levels (A) Signup and view all the answers

What is measured by an end-tidal carbon dioxide analyser?

End-tidal CO2 levels (B) Signup and view all the answers

What is another name for an end-tidal CO2 analyser?

Capnograph (D) Signup and view all the answers

What type of display is provided by a capnograph?

Graphical waveform display (C) Signup and view all the answers

What is the name of the device that records and displays CO2 levels?

Capnograph (B) Signup and view all the answers

What is the main function of the heater in the main stream sampling chamber?

To prevent vapour condensation (B) Signup and view all the answers

How many types of sampling chambers are mentioned?

Two (A) Signup and view all the answers

Where is the main stream sampling chamber located?

Within the patient gas stream (B) Signup and view all the answers

What is the purpose of the sampling chamber?

To sample the patient gas stream (D) Signup and view all the answers

What is a feature of the main stream sampling chamber?

It has a heater to prevent vapour condensation (A) Signup and view all the answers

What happens to infrared radiation when it interacts with CO2?

It is absorbed (C) Signup and view all the answers

What determines the amount of infrared radiation absorbed by CO2?

Partial pressure of CO2 (A) Signup and view all the answers

How does the photodetector respond to light?

It generates voltage (D) Signup and view all the answers

What is the relationship between the amount of light and the voltage generated by the photodetector?

The voltage increases as light intensity increases (A) Signup and view all the answers

What is the role of CO2 in the mechanism described?

It absorbs infrared radiation (A) Signup and view all the answers

What is the purpose of sending the voltages to the microprocessor?

To analyze the room air composition (D) Signup and view all the answers

What is the function of the reference chamber?

To contain room air for reference (B) Signup and view all the answers

What is the contents of the reference chamber?

Room air (C) Signup and view all the answers

What is the role of the microprocessor in the CO2 measurement process?

To analyze the voltage signals from the sensors (C) Signup and view all the answers

What is the purpose of the room air in the reference chamber?

To serve as a baseline for the CO2 measurement (B) Signup and view all the answers

Flashcards

Normal CO2 range (mmHg)

The typical range of carbon dioxide partial pressure measured in millimeters of mercury (mmHg) during expiration.

End-tidal CO2

The carbon dioxide level measured at the end of exhalation.