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Table 1 Endoscope Characteristics

From: Comparative evaluation of posterior percutaneous endoscopy cervical discectomy using a 3.7 mm endoscope and a 6.9 mm endoscope for cervical disc herniation: a retrospective comparative cohort study

Endoscope

OD (mm)

ID (mm)

OA (°)

WL/TL (mm)

6.9 mm endoscope

10 mm

6.9 mm

30

125/205

3.7 mm endoscope

6.9 mm

3.7 mm

15

125/205

  1. OD represents outer diameter, ID indicates inner diameter, OV optics angle, WL and TL are the working length and the total length of the endoscope applied, respectively