This document discusses the use of capnography, or the monitoring of end-tidal carbon dioxide levels (EtCO2). It begins by stating that capnography is the most reliable method to confirm proper endotracheal tube placement. It then covers the physiology of respiration and how factors like increased/decreased cardiac output, bronchospasm, or hypo/hyperventilation can affect EtCO2 levels. Normal EtCO2 ranges from 35-45 mmHg. The document outlines the four main applications of capnography: assessing asthma severity, monitoring head injuries, during cardiac arrest, and tube confirmation. It provides examples of normal and abnormal waveforms and discusses how capnography can be used to guide treatment and evaluate
Comprehensive presentation on intra arterial blood pressure with a good insight into the the basic physics and brief look into the risks and complications.
In critical care medicine the invasive life saving techniques are often employed and when all goes well such interventions will be withdrawn to all for normal physiology to resume. Identifying this point for safe withdrawal for the resumption of normal respiratory function is of utmost importance.
Comprehensive presentation on intra arterial blood pressure with a good insight into the the basic physics and brief look into the risks and complications.
In critical care medicine the invasive life saving techniques are often employed and when all goes well such interventions will be withdrawn to all for normal physiology to resume. Identifying this point for safe withdrawal for the resumption of normal respiratory function is of utmost importance.
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Perhaps the most important monitoring tool prehospital providers can use.”, end tidal waveform capnography isn’t just for respirations anymore. Using a simple four-step assessment technique, this program shows EMS providers of all levels how capnography can be used not only to confirm successful endotracheal intubation, but also to evaluate shock in trauma patients, monitor for return of (or loss of) pulses during CPR, identify bronchospasm in asthma and hypoxic drive in COPD, to guide seizure management, and much, much more. This case-driven session develops the fundamentals of capnography so that every EMS provider can improve the assessment, treatment and outcome for their patients using the diagnostic tools of end tidal waveform monitoring.
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capnography refers to the noninvasive measurement of the partial pressure of carbon dioxide (CO2) in exhaled breath expressed as the CO2 concentration over time. The relationship of CO2 concentration to time is graphically represented by the CO2 waveform, or capnogram . Changes in the shape of the capnogram are diagnostic of disease conditions, while changes in end-tidal CO2 (EtCO2), the maximum CO2 concentration at the end of each tidal breath, can be used to assess disease severity and response to treatment. Capnography is also the most reliable indicator that an endotracheal tube is placed in the trachea after intubation.
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2. Objectives
• Understand why we use capnography
• Understand the physiology of respiration/ ventilation
• Define normal & abnormal EtCO2 values/ waveforms
• Understand the 4 major applications of EtCO2
– intubated applications (mainstream)
– non-intubated applications (sidestream)
3. Why Capnography?
Advanced Airway Management
All devices used to confirm tube placement must be documented on the
PCR.
• Esophageal Detection Device (EDD)
• End tidal CO2 detector (ETCO2) colorimetric or capnography
“Conclusion: No unrecognized misplaced intubations were found in
patients for whom paramedics used continuous EtCO2 monitoring.
Failure to use continuous EtCO2 monitoring was associated with a
23% unrecognized misplaced intubation rate.
[Annals of Emergency Medicine 2005; 45:497-503]”
4. Why Capnography?
• Verification of proper tube placement
There is simply NO BETTER WAY to confirm proper tube placement
than with waveform capnography…. PERIOD!!!
16. 4 Main Uses of Capnography
• Severity of asthma patients
• Monitoring head injured patients
• Cardiac arrest
• Tube confirmation
17. Terminology
Sidestream
An indirect method of measuring exhaled CO2 in non-intubated patients
Mainstream
Direct method of measuring exhaled CO2 with intubated patients
18. Shark Fin
Asthmatic Waveforms
COPD patients have a difficult time exhaling gases
This is represented on the capnogram by a shark fin appearance
20. Severe Attack
EtCO2 & Asthma
Time To Get MOVING!!!
The asthmatic who looks tired and has a shark fin appearance on the capnogram…
IS HEADED FOR RESPIRATORY ARREST
21. The Head Injured Patient
Carbon dioxide dilates the cerebral blood vessels,
increasing the volume of blood in the intracranial vault and
therefore increasing ICP
Recognizing the head
injured patient and
titrating their CO2
levels to the 30-3530-35
mmHgmmHg range can help
relieve the untoward
effects of ICP
22. Titrate EtCO2
The Head Injured Patient
Titration IS NOT hyperventilation. Intubating a head
injured patient and using capnography gives a means to
closely monitor CO2 levels.
Keep them between 30 and 35 mmHg
23. EtCO2 and Cardiac Arrest
The capnograph of an intubated cardiac arrest
patient is a direct correlation to cardiac output
Increase in CO2 during CPR can
be an early indicator of ROSC
24. Termination of Resuscitation
EtCO2 measurements during a resuscitation give
you an accurate indicator of survivability for
patients under CPR
Non-survivors <10 mmHg10 mmHg
Survivors >30 mmHg30 mmHg
((to discharge)
25. ET Tube Verification
• Verification of proper tube placement
There is simply NO BETTER WAY to confirm proper tube placement
than with waveform capnography…. PERIOD!!!
26.
27. 4 Main Uses of Capnography
Core Concepts
• What is the characteristic shape of a capnogram for a COPD patient?
• Describe how to determine the severity of an asthma attack using
capnography?
• What level should you maintain a severe head injured patient’s CO2 at?
• What are two ways that capnography can assist during CPR?
28. Inadequate Seal
Troubleshooting
As air escapes around the cuff during BVM respirations the waveform
will distort, alerting you to a possibly deflated or damaged ET cuff