Quick Answer: How Does A Capnograph Work?

What is the purpose of capnography?

Capnography provides a rapid and reliable method to detect life-threatening conditions (malposition of tracheal tubes, unsuspected ventilatory failure, circulatory failure and defective breathing circuits) and to circumvent potentially irreversible patient injury..

What is the purpose of EtCO2 monitoring?

ETCO2 can be recommended as a noninvasive method for determination of metabolic acidosis and can be used to detect early metabolic acidosis in patients with spontaneous breathing, however, ABG should be used as the gold standard for diagnosis and management of treatment (60).

What is the normal range for the etco2 value?

35-45 mmHgEnd-tidal CO2 – EtCO2 is a noninvasive technique which represents the partial pressure or maximal concentration of CO2 at the end of exhalation. Normal value is 35-45 mmHg.

What is a normal capnography reading?

When it comes to capnography, everyone knows the normal adult respiratory rate of 12-20 breaths per minute and most people know, or quickly learn, that the normal quantity of exhaled CO2 is 35-45 mmHg. What can be intimidating is the idea of reading the shape of the waveform, but in practice it’s not difficult at all.

What does a Capnograph measure?

Page 1. Capnography is the measurement of exhaled CO2; the number is. displayed in millimeters of Mercury (mm Hg) or percent (%) CO2. Capnography provides the clinician with a waveform which tracks. exhaled CO2 over time.

How do you read a Capnograph?

Waveform capnography represents the amount of carbon dioxide (CO2) in exhaled air, which assesses ventilation. It consists of a number and a graph. The number is capnometry, which is the partial pressure of CO2 detected at the end of exhalation. This is end-tidal CO2 (ETCO2) which is normally 35-45 mm Hg.

What is the normal range for capnography?

Normal Capnography Waveform For healthy adults, the breathing pattern occurs approximately every 3-5 seconds, which signifies a normal respiratory rate between 12-20 breaths per minute.

How do you measure expired co2?

The measurement of expired CO2 is called capnometry, or capnography. CO2 is recorded continuously, with an output of a characteristic waveform. The CO2 analyzer can be located in the mainstream or sidestream of a ventilator circuit (39).

What are the three types of etco2 monitors?

Three primary types of ETco2 monitors are available: sidestream, mainstream, and Microstream®.

Is capnography expensive?

Purchase of a pulse oximetry monitor was assumed to be at no cost, whereas capnography cost USD 4,000 per monitor and USD 16 per procedure for disposables (double that for pulse oximetry at USD 8.10). Both types of monitoring were associated with training and maintenance requirements.

What does a sloped upstroke on a Capnogram indicate?

Prolongation or slanting of the expiratory upstroke phase II occurs when there is obstruction to expiratory gas flow (e.g., asthma, bronchospasm, obstructive pulmonary disease, and kinked endotracheal tube,1-9 or in the presence of leaks in the breathing system.

What is the difference between a Capnograph and a Capnometer?

Capnography refers to the comprehensive measurement and display of CO2 including end-tidal, inspired, and the capnogram (real-time CO2 waveform). A capnograph is a device which measures CO2 and displays a waveform. Capnometry refers to the measurement and display of CO2 in numeric form only.