What is Capnography: How to Capnography work best uses 2022

What is Capnography?

Capnography is the monitoring of the concentration or partial pressure of carbon dioxide in the respiratory gases. It provides physiological information on ventilation and metabolism, which is important for airway management. Its main development has been as a monitoring tool for use during anesthesia and intensive care.

Capnography is part of a paramedic’s toolkit. Recent surveys indicate that upwards of 90–95 percent agree that capnography is easy to understand and an important monitoring tool for patients with cardiac arrest who are experiencing respiratory distress, or sick with sepsis.

What is Capnography How to Capnography work

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The Capnogram is a direct monitor of the inhalation and exhalation concentration or partial pressure of CO, and an indirect monitor of the CO2 partial pressure in arterial blood. In healthy individuals, the difference between the partial pressure of arterial blood and the exhaust gas CO2 is very small.

Capnography is the measurement of carbon dioxide in a patient’s exhalation over time. Commonly used during anesthesia procedures, capnography is increasingly being used by paramedics in the field for a variety of purposes, including evaluating the success of resuscitation efforts, confirming clinical death, and causing respiratory distress.

How to Capnography work?

One utility of carbon dioxide (CO2) is that it absorbs infrared radiation. When the patient exhales, a beam of infrared light is passed over the gas sample on the sensor.

In this, low CO2 levels result in high amounts of light, while high CO2 levels are indicated by low infrared. The presence or lack of CO2 is indicated inversely by the amount of light passing through the sensor.

In the presence of most forms of lung disease and some forms of congenital heart disease, the difference between arterial blood and expired gas increases and may exceed 1 kPa.

What is Capnography How to Capnography work

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CO2 levels are then displayed on the detector and adjusted for the presence of nitrous oxide, which can also absorb infrared rays and thus cause some confusion if not accounted for.

What is measured by the capnograph is known as end tidal CO2, or the amount (or partial pressure) of carbon dioxide released at the end of expiration, which is needed to assess cardiac output.

Why is capnography so important?

CO2 levels in the blood are incredibly important for proper oxygenation and metabolism, which is why capography is so useful. The irregular amount of CO2 in a patient’s breath and the amount of that irregularity can tell health care providers a lot about the condition and treatment needed.

In hospitals, capnography has traditionally been used during anesthesia, where it monitors metabolic processes through CO levels, both depleted and arterial.

What is Capnography How to Capnography work

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Capnography helps to identify conditions that can lead to hypoxia. Furthermore, it helps in the rapid differential diagnosis of hypoxia before hypoxia leads to irreversible brain damage.

Because of these benefits, the usefulness of capnography has recently been extended to on-site emergency and trauma areas outside the area of ​​emergency rooms, endoscopic suites, X-ray rooms, and even operating rooms.

ETCO2 levels are highly indicative of the effectiveness of chest compressions during CPR, and may be the first indicator of the return of spontaneous circulation.

In addition, capnography is used to analyze the causes of respiratory distress in patients, including asthma, chronic obstructive pulmonary disease, or bronchitis. It can also provide early warning signs of hypoventilation or airway obstruction before any changes are seen in the heart rate or blood pressure monitor.

Capnography is an incredibly effective way to identify low perfusion, as ETCO2 levels can also provide early warning signs of shock. And finally, capnography may also provide a way to determine when resuscitation efforts can reasonably stop in other words, certain ETCO2 activity levels may serve as confirmation of clinical death.

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Advantage of Capnography

The transmission of airflow is a surrogate measure, such as impedance basing, that the aircraft can apply as a ‘correction’ to climate change. Due to the favorable weather conditions it is in, it will be better suited to the better weather as well.

Disadvantage of Capnography

Compliance and especially of ‘scoop’ cannula, which are essential when needed such as S sensitive, apnea, and are less sensitive when disease requires it to be included.