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Updated: Sep 30, 2025

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Evaluation of Capnography Sampling Line Compatibility and Accuracy when Used with a Portable Capnography Monitor
Published on: September 29, 2020
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Aneurysmal Oscillation of the Capnogram: A Case Report
Kulbhushan Saini1, Avneet Singh1, Anand Kumar Mishra2
1From the Departments of Anesthesia and Intensive Care.
A&A Practice
|March 14, 2022
Summary
Capnogram variations can mimic patient breathing efforts. Oscillations from thoracic aneurysms are distinct and may signal bronchial or lung compression.
Area of Science:
- Anesthesiology
- Pulmonology
- Critical Care Medicine
Background:
- Alveolar plateau phase variations in capnography are frequently misidentified as spontaneous breathing efforts in intubated patients.
- Capnographic oscillations can arise from various sources, necessitating accurate differentiation for proper patient management.
Observation:
- Oscillations in the capnogram can be mistaken for patient effort.
- Large ascending thoracic aneurysms cause distinct capnogram waveform changes.
- These oscillations differ from cardiogenic oscillations.
Findings:
- Capnogram oscillations due to thoracic aneurysms are a separate phenomenon.
- These specific oscillations can indicate bronchial or lung compression.
- Distinguishing these oscillations is key for accurate diagnosis.
Implications:
- Improved differentiation between artifact and patient effort in intubated patients.
- Early detection of potential bronchial or lung compression.
- Enhanced understanding of capnography in complex cardiovascular cases.
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