Table 1 The type of DAVC−PGV with different INTA and the difference of DAVC−PGV (mm) between left side and right side at L1-S1
From: The optimal introversion angle and length of pedicle screw to avoid L1-S1 vascular damage
Lumbar | ITNA (°) | Type of DAVC−PGV | Left number (%) | Right number (%) | P | Left LAVC−PGV | Right LAVC−PGV |
|---|---|---|---|---|---|---|---|
L1 | 5 | Grade III Grade II Grade I N | 28(25.5) 31(28.2) 45(40.9) 6(5.4) | - - - 110(100) | 0.000 | 2.01 ± 0.65 3.94 ± 0.56 7.17 ± 1.79 - | - - - - |
L1 | 10 | Grade III Grade II Grade II N | 61(55.5) 25(22.7) 19(17.3) 5(4.5) | - - 14(12.7) 96(87.3) | 0.000 | 1.77 ± 0.67 3.66 ± 0.53 7.22 ± 1.83 - | 8.56 ± 2.45 - |
L1 | 15 | Grade III Grade II Grade I N | 29(26.4) 22(20.0) 8(7.3) 51(46.4) | 9(8.2) 21(19.1) 30(27.3) 50(45.5) | 0.000 | 1.77 ± 0.72 4.12 ± 0.67 7.12 ± 1.44- | 2.35 ± 0.38 3.86 ± 0.55 7.74 ± 2.26 - |
L2 | 5 | Grade III Grade II Grade I N | 10(9.1) 16(14.5) 70(63.6) 14(12.7) | 1(0.9) 2(1.8) 3(2.7) 104(94.5) | 0.000 | 2.13 ± 0.58 3.92 ± 0.58 8.56 ± 2.93 - | 2.20 4.85 ± 0.19 10.58 ± 3.95 - |
L2 | 10 | Grade III Grade II Grade I N | 22(20.0) 32(29.1) 43(39.1) 13(11.8) | 2(1.8) 1(0.9) 14(12.7) 93(84.5) | 0.000 | 1.96 ± 0.72 3.91 ± 0.63 7.87 ± 2.54 - | 2.25 ± 0.06 3.27 8.87 ± 3.45 - |
L2 | 15 | Grade III Grade II Grade I N | 15(13.6) 20(18.2) 25(22.7) 50(45.5) | 10(9.1) 11(10.0) 44(40.0) 45(40.9) | 0.027 | 2.05 ± 0.52 3.71 ± 0.64 7.20 ± 2.52 - | 2.36 ± 0.67 4.27 ± 0.44 7.81 ± 2.42 - |
L3 | 5 | Grade III Grade II Grade I N | 3(2.7) 10(9.1) 60(54.5) 37(33.7) | 1(0.9) 1(0.9) 5(4.5) 103(93.6) | 0.000 | 2.20 ± 0.11 4.05 ± 0.50 9.65 ± 2.94 - | 1.47 3.94 6.53 ± 1.37 - |
L3 | 10 | Grade III Grade II Grade I N | 14(12.7) 20(18.2) 64(58.2) 12(10.9) | 1(0.9) 4(3.6) 16(14.5) 89(80.9) | 0.000 | 2.08 ± 0.55 4.32 ± 0.53 8.44 ± 2.65 - | 1.05 3.77 ± 0.73 7.91 ± 2.88 - |
L3 | 15 | Grade III Grade II Grade I N | 18(16.4) 20(18.2) 32(29.1) 40(36.4) | 11(10.0) 10(9.1) 39(35.5) 50(45.5) | 0.079 | 2.06 ± 0.60 3.97 ± 0.50 7.73 ± 1.85 - | 2.27 ± 0.57 4.30 ± 0.49 8.74 ± 2.36 |
L4 | 5 | Grade III Grade II Grade I N | 3(2.7) 4(3.6) 38(34.5) 65(59.1) | 53(48.2) 23(20.9) 29(26.4) 5(4.5) | 0.000 | 1.57 ± 0.99 3.89 ± 0.88 9.52 ± 3.57 - | 1.76 ± 0.72 3.81 ± 0.50 7.49 ± 2.42 - |
L4 | 10 | Grade III Grade II Grade I N | 17(15.5) 20(18.2) 65(59.1) 8(7.3) | 62(56.4) 21(19.1) 21(19.1) 6(5.5) | 0.000 | 1.86 ± 0.81 4.02 ± 0.55 8.13 ± 2.77- | 1.58 ± 0.69 3.73 ± 0.50 7.66 ± 2.69 - |
L4 | 15 | Grade III Grade II Grade I N | 35(31.8) 30(27.3) 37(33.6) 8(7.3) | 49(44.5) 26(23.6) 24(21.8) 11(10.0) | 0.118 | 1.78 ± 0.71 3.96 ± 0.51 8.20 ± 2.66 - | 1.55 ± 0.64 4.13 ± 0.55 8.38 ± 2.47 - |
L5 | 5 | Grade III Grade II Grade I N | 31(28.2) 14(12.7) 29(26.4) 36(32.7) | 78(70.9) 11(10.0) 16(14.5) 5(4.5) | 0.000 | 1.53 ± 0.70 3.87 ± 0.63 8.37 ± 3.63 - | 1.30 ± 0.55 3.91 ± 0.56 7.64 ± 2.04 - |
L5 | 10 | Grade III Grade II Grade I N | 60(54.5) 15(13.6) 25(22.7) 10(9.1) | 74(67.3) 13(11.8) 10(9.1) 13(11.8) | 0.037 | 1.43 ± 0.62 4.14 ± 0.69 8.42 ± 3.03 - | 1.29 ± 0.56 3.90 ± 0.55 6.99 ± 1.57 - |
L5 | 15 | Grade III Grade II Grade I N | 74(67.3) 11(10.0) 19(17.3) 6(5.5) | 76(69.1) 15(13.6) 6(5.5) 13(11.8) | 0.019 | 1.20 ± 0.44 3.92 ± 0.66 8.94 ± 3.37 - | 1.27 ± 0.44 4.04 ± 0.51 7.77 ± 1.95 - |
S1 | 0 | Grade III Grade II Grade I N | 71(64.5) 13(11.8) 12(10.9) 14(12.7) | 60(55.0) 20(18.3) 20(18.3) 9(8.3) | 0.142 | 1.26 ± 0.51 3.77 ± 0.70 6.69 ± 1.63 - | 1.48 ± 0.61 3.99 ± 060 7.91 ± 3.04 - |
S1 | 5 | Grade III Grade II Grade I N | 67(60.9) 5(4.5) 3(2.7) 35(31.8) | 57(51.8) 15(13.6) 12(10.9) 26(23.6) | 0.005 | 1.17 ± 0.44 3.96 ± 0.90 5.59 ± 0.58 - | 1.39 ± 0.57 3.77 ± 0.70 8.34 ± 2.87 - |
S1 | 10 | Grade III Grade II Grade I N | 35(31.8) 2(1.8) 1(0.9) 72(65.5) | 36(32.7) 8(7.3) 7(6.4) 59(53.6) | 0.024 | 1.15 ± 0.46 3.74 ± 0.57 5.13 - | 1.41 ± 0.60 4.00 ± 0.41 6.54 ± 2.20 - |
S1 | 15 | Grade III Grade II Grade I N | 21(19.1) 1(0.9) 2(1.8) 86(78.2) | 15(13.6) 1(0.9) 1(0.9) 93(84.5) | 0.727 | 1.08 ± 0.35 3.70 7.78 ± 0.55 | 1.33 ± 0.54 4.31 7.83 |