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Table 1 Demographics, clinical, and surgical parameters of 28 patients with TSS

From: Ultrasonic bone scalpel for thoracic spinal decompression: case series and technical note

No. Age/gender Diagnosis (level) Surgical approach (segments) BL (ml) Number of decompressed segments Time for LA (min) JOA Scores (11) Recovery rate (%) FU (month) Complications
Preop Postop
1 47/F OLF (T2-3) + OPLL (T1-5) LA (T1-5) + CD (T1/2) 750 4 8 4 10 85.7 52 None
2 46/F OLF (T2-10) + OPLL (T2-7) LA (T2-10) + CD (T6/7) 800 8 19 5 10.5 91.7 48 CSF leaks
3 55/F OLF (T4-12) + OPLL (T4-8), skeletal fluorosis LA (T4-12) + CD (T6/7) 810 8 40 3 9 75.0 47 Left T4 nerve root injury, CSF leaks
4 50/F OLF (T1-3) + OPLL (C7-T6) LA (T1-8) + CD (T5/6) 780 7 25 4 9 71.4 34 None
5 60/M OLF (T9-T11) LA (T9-12) 320 3 12 5 10.5 91.7 25 None
6 65/M TDH (T8-9) LA (T8-9) + CD(T8/9) 260 1 5 6 10 80.0 40 None
7 40/M OPLL (C7-T4) LA (C7-T4) 370 5 10 4 10 85.7 32 None
8 57/F OLF (T9-11) + TDH (T10-11) LA (T9-11) + CD (T10/11) 410 2 3 3 9.5 81.3 60 None
9 50/F OPLL (T1-T5) LA (T1-5) + CD (T1/2) 490 4 14 5 11 100.0 36 None
10 47/F OPLL (T5-9) LA (T1-5) + CD (T6/7) 515 4 20 5 10 83.3 40 Left T2 nerve root injury, CSF leaks
11 62/F OLF (T1-4) + OPLL (C2-T3) LA (T1-4) 580 3 19 4 10 85.7 27 None
12 44/M OLF + TDH (T10-11) LA (T10-11) + CD (T10/11) 280 1 6 4 10 85.7 31 None
13 44/F OLF (T9-T11) LA (T9-11) 270 2 5 6 11 100.0 30 None
14 41/M OLF (T12-L1) LA (T12-L1) 110 1 3 4 10 85.7 44 None
15 63/F OLF (T7-10) LA (T7-10) 280 3 5 5 11 100.0 48 None
16 36/M OLF (T2-4) LA (T2-4) 180 2 5 5 10.5 91.7 37 None
17 52/F OLF (T10-11) LA (T10-11) 110 1 2 6 11 100.0 50 None
18 46/M OLF (T8-12) LA (T8-12) 460 4 5 5 10 83.3 44 None
19 41/M OLF + OPLL (T5-8) LA (T5-8) + CD (T6/7) 435 3 10 3 9.5 81.3 49 None
20 58/F OLF + TDH (T11-L1) LA (T11-L1) + CD (T11/12) 380 2 7 6 10 80.0 43 None
21 56/F OLF (T1-8) LA (T1-8) 350 7 10 4 9 71.4 28 CSF leaks
22 58/F OLF (T9-T11) LA (T9-11) 110 2 5 4 10 85.7 37 None
23 50/M OLF (T9-T11) LA (T9-11) 130 2 6 5 11 100.0 31 None
24 39/M TDH (T11-12) LA (T11-12) + CD (T11/12) 255 1 3 4 10 85.7 46 None
25 41/F OLF (T9-T11) LA (T9-11) 210 2 4 6 10.5 90.0 27 None
26 38/M OLF (T2-4) LA (T2-4) 110 2 3 5 10 83.3 38 None
27 60/M OLF (T10-12) LA (T10-12) 400 2 5 5 9 66.7 48 CSF leaks
28 45/F OLF (T1-L2) LA (T1-L2) 2280 13 40 6 10 80.0 39 CSF leaks
  1. Recovery rate (%) = (postoperative JOA score − preoperative JOA score) × 100/(full score (11) − preoperative JOA score)
  2. M male, F female, OPLL ossification of posterior longitudinal ligament, OLF ossification of ligamentum flavum, TDH thoracic disk herniation, LA en bloc resection of lamina and OLF, CD circumferential decompression, BL blood loss, CSF cerebrospinal fluid, FU follow-up