Carina (Medical Definition) | Quick Explainer Video

What is Carina? This video covers the medical definition and provides a brief overview of this topic.
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➡️ Carina Definition
The carina is located at the lower end of the trachea where it separates into the two mainstem bronchi. This is normally at the base of the aortic arch which should be at the level of the 4th to 5th thoracic vertebra. The carina lies slightly left of the midline and the right mainstem bronchus branches off at a lower angle compared to the left mainstem bronchus. This results in a greater number of right-mainstem intubations which occurs when the endotracheal tube passes too far through the trachea and enters the right bronchus. This would result in no ventilation in the left lung and likely overventilation in the right.

➡️ Carina Location
The carina serves as an important landmark during intubation. The tip of the ET tube should be located approximately 3-5 cm above the carina. This can be confirmed with a chest x-ray. Foreign body aspiration is also more common in the right mainstem bronchus as well because the angle at which it branches off provides a more direct pathway. Each of the bronchi will continue to branch out further inferiorly into bronchioles which facilitate the transfer of gases into and out of the lungs. The bronchioles divide into alveoli which is the area that the gas exchange of oxygen and carbon dioxide takes place.

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🚑MEDICAL DISCLAIMER
This content is for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Please consult with a physician with any questions that you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you watch in this video. We strive for 100% accuracy, but errors may occur, and medications, protocols, and treatment methods may change over time.

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⏰TIMESTAMPS
0:00 - Intro
0:22 - Carina Definition
1:07 - Carina Location

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▪ Music licensed from Audiojungle.net/
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