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Low PETCO2 readings on patients may indicate hyperventilation. [ 16 ] Capnography, because it provides a breath by breath measurement of a patient's ventilation, can quickly reveal a worsening trend in a patient's condition by providing paramedics with an early warning system into a patient's respiratory status.
Colorimetric capnography is a qualitative measurement method that detects the presence of carbon dioxide (CO2, a relatively acidic gas) in a given gaseous environment. From a medical perspective, the method is usually applied by exposing litmus paper/film to an environment containing a patient's airway gases (i.e. placing it into their breathing circuit/airway circuit), where it will then ...
Integrated pulmonary index (IPI) is a patient pulmonary index which uses information from capnography and pulse oximetry to provide a single value that describes the patient's respiratory status.
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Assessing and monitoring blood gas levels is the most accurate means to identify a state of respiratory compromise in patients. ABG testing does however require an arterial blood sample, which is more invasive and uncomfortable for patients than a pulse oximetry reading that uses a reading based on light and color. [7]
Positive pressure ventilators work by blowing air into the patient's lungs via intubation through the airway; they were used for the first time in Blegdams Hospital, Copenhagen, Denmark, during a polio outbreak in 1952. [39] [40] It proved a success and by 1953 it had superseded the iron lung throughout Europe. [41]