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Table 2: Results of transforaminal approach
Patient Foramen Guidance Time (min) Obliquity in the Sagittal Plane Technical Success^{^a} Hydrodissection Maximal Temperature (°C)
1 T12–L1 Fluoro 11 40° Yes Yes, effective 39
2 L1–L2 Fluoro 11 40° Yes Yes, effective 41
3 T12–L1 CT & fluoro 9 36° Yes Yes, effective 45
4 L1–L2 Fluoro 12 35° Yes No 45
5 L2–L3 Fluoro 10 43° Yes Yes, effective 43
L3–L4 Fluoro 6 38° Yes No 44
6 T12–L1 CT & fluoro 7 42° Yes Yes, effective 41
7 T12–L1 Fluoro 8 44° Yes Yes, ineffective 44
8 L1–L2 Fluoro & CBCT 38 33° No (4 mm too cranial and 5 mm too lateral) Yes, ineffective 39
9 T12–L1 Fluoro 5 36° Yes Yes, effective 43
10 L3–L4 Fluoro 8 47° Yes Yes, effective 38
11 L2–L3 CT & fluoro 9 37° Yes Yes, effective 39
12 T12–L1 CT & fluoro 7 47° Yes Yes, effective 45
13 L2–L3 CT & fluoro 7 44° Yes No 42
Note:—Fluoro indicates fluoroscopy; CBCT, conbeam CT.
↵a Technical success was defined by a position of the thermosensor in the midline on anteroposterior view and at the midportion of the posterior wall on lateral view.