From: Evaluation of efficacy and safety of percutaneous transforaminal endoscopic surgery (PTES) for surgical treatment of calcified lumbar disc herniation: a retrospective cohort study of 101 patients
CLDH
ULDH
p-value
Duration of operation (min)a
64.74 ± 11.82
58.83 ± 15.52
0.087
Frequency of intraoperative fluoroscopyb
6 (5–16)
5 (4–14)
0.090
Hospitalization daysb
3 (2–4)
3 (2–5)
0.777
Blood lossb
5 (2–20)
5 (5–25)
0.187