The normal Z-line, also known as the squamocolumnar junction, typically measures 36-40 cm from the incisor teeth during an upper endoscopy.
The Z-line is a crucial landmark identified during upper endoscopy. It represents the transition between the squamous epithelium of the esophagus and the columnar epithelium of the stomach. Its location is measured in centimeters from the incisor teeth.
Key Takeaways:
- Normal Range: 36-40 cm from the incisor teeth.
- Importance: A key landmark during endoscopy.
- Definition: Boundary between esophageal and gastric lining.
