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Capnography

Capnography. prepared by Miss Fatima Hirzallah. Capnography is the monitoring of the concentration or partial pressure of carbon dioxide (CO 2 ) in the respiratory gases. Its main development has been as a monitoring tool for use during anaesthesia and intensive care . .

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Capnography

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  1. Capnography prepared by Miss Fatima Hirzallah

  2. Capnography is the monitoring of the concentration or partial pressure of carbon dioxide (CO2) in the respiratory gases. Its main development has been as a monitoring tool for use during anaesthesia and intensive care.

  3. The capnogram is a direct monitor of the inhaled and exhaled concentration or partial pressure of CO2, and an indirect monitor of the CO2 partial pressure in the arterial blood .

  4. Capnography directly reflects the elimination of CO2 by the lungs to the anaesthesia device. Indirectly, it reflects the production of CO2 by tissues and the circulatory transport of CO2 to the lungs .

  5. Diagnostic usage • Capnography provides information about : • CO2production • Increased CO2 production is seen during fever and shivering • Reduced production is seen during anaesthesia and hypothermia

  6. Diagnostic usage • Pulmonary (lung) perfusion • Alveolar ventilation • Respiratory patterns • elimination of CO2 from the anaesthesia breathing circuit and ventilator • lung disease; COPD , asthma

  7. capnographyin anaesthesia 1-Capnography help in early detection of adverse respiratory events such as: • hypoventilation • esophageal intubation • circuit disconnection; thus allowing patient injury to be prevented

  8. capnographyin anaesthesia 2-Capnography provides a rapid and reliable method to detect life-threatening conditions : • malposition of tracheal tubes • unsuspected ventilatory failure& circulatory failure • defective breathing circuits

  9. Capnography in emergency medical services • verifying and monitoring the position of an endotracheal tube. • capnography, which indirectly measures cardiac output, can used to monitor the effectiveness of CPR and as an early indication of return of spontaneous circulation (ROSC).

  10. Paramedics are also now beginning to monitor the ETCO2 status of nonintubated patients by using a special nasal cannula that collects the carbon dioxide. • A high ETCO2 reading in a patient with altered mental status or severe difficulty breathing may indicate hypoventilation and a possible need for the patient to be intubated.

  11. CONLUSION • 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.

  12. THANKS

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