The carina is typically located at the level of the 4th to 5th thoracic vertebra.
Understanding the Carina's Level
The carina is a cartilaginous ridge located at the point where the trachea (windpipe) divides into the two main bronchi (airways leading to the lungs). Its anatomical position is significant in medical procedures and understanding respiratory anatomy.
Based on anatomical references:
- The carina is found at the lower end of the trachea.
- Its usual level corresponds to the 4th to 5th thoracic vertebra (T4-T5).
- This location is generally aligned with the sternal angle (the joint between the manubrium and the body of the sternum).
Variability in Carina Position
While T4-T5 is the standard reference, the exact level of the carina can change:
- Breathing: The carina may slightly raise or descend.
- Range: This vertical movement can be up to two vertebral levels higher or lower depending on respiratory phase (inhalation or exhalation).
Aspect | Description |
---|---|
Usual Level | 4th to 5th thoracic vertebra (T4-T5) |
Anatomical Landmark | Aligned with the sternal angle |
Positional Change | Can move up or down with breathing |
Range of Motion | Up to two vertebral levels higher or lower |
Understanding the usual level and its potential variation is important in imaging interpretation and bronchoscopy procedures.