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Purpose: The aim of the present study was to investigate the factors associated with C5 palsy by focusing on radiological parameters using multivariable analysis. Methods: The authors retrospectively assessed 190 patients with cervical spondylotic myelopathy treated by open-door laminoplasty. Four radiographic parameters—the number of expanded lamina, C3–C7 angle, lamina open angle and space anterior to the spinal cord—were evaluated to clarify the factors associated with C5 palsy. Results: Of the 190 patients, 11 developed C5 palsy, giving an overall incidence of 5.8%. Although the number of expanded lamina, lamina open angle and space anterior to the spinal cord were significantly larger in C5 palsy group than those in non-palsy group, a multiple logistic regression analysis revealed that only the space anterior to the spinal cord (odds ratio 2.60) was a significant independent factor associated with C5 palsy. A multiple linear regression analysis indicated that the lamina open angle was associated with the space anterior to the spinal cord and the analysis identified the following equation: space anterior to the spinal cord (mm) = 1.54 + 0.09 × lamina open angle (degree). A cut-off value of 53.5° for the lamina open angle predicted the development of C5 palsy with a sensitivity of 72.7% and a specificity of 83.2%. Conclusions: The larger postoperative space anterior to the spinal cord, which was associated with the lamina open angle, was positively correlated with the higher incidence of C5 palsy.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 2410-2416 |
| ページ数 | 7 |
| ジャーナル | European Spine Journal |
| 巻 | 26 |
| 発行部数 | 9 |
| DOI | |
| 出版物ステータス | Published - 01-09-2017 |
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All Science Journal Classification (ASJC) codes
- Surgery
- Orthopedics and Sports Medicine
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Factors associated with postoperative C5 palsy after expansive open-door laminoplasty : retrospective cohort study using multivariable analysis. / Tsuji, Takashi; Matsumoto, Morio; Nakamura, Masaya; Ishii, Ken; Fujita, Nobuyuki; Chiba, Kazuhiro; Watanabe, Kota.
：: European Spine Journal, 巻 26, 番号 9, 01.09.2017, p. 2410-2416.研究成果: Article
TY - JOUR
T1 - Factors associated with postoperative C5 palsy after expansive open-door laminoplasty
T2 - retrospective cohort study using multivariable analysis
AU - Tsuji, Takashi
AU - Matsumoto, Morio
AU - Nakamura, Masaya
AU - Ishii, Ken
AU - Fujita, Nobuyuki
AU - Chiba, Kazuhiro
AU - Watanabe, Kota
PY - 2017/9/1
Y1 - 2017/9/1
N2 - Purpose: The aim of the present study was to investigate the factors associated with C5 palsy by focusing on radiological parameters using multivariable analysis. Methods: The authors retrospectively assessed 190 patients with cervical spondylotic myelopathy treated by open-door laminoplasty. Four radiographic parameters—the number of expanded lamina, C3–C7 angle, lamina open angle and space anterior to the spinal cord—were evaluated to clarify the factors associated with C5 palsy. Results: Of the 190 patients, 11 developed C5 palsy, giving an overall incidence of 5.8%. Although the number of expanded lamina, lamina open angle and space anterior to the spinal cord were significantly larger in C5 palsy group than those in non-palsy group, a multiple logistic regression analysis revealed that only the space anterior to the spinal cord (odds ratio 2.60) was a significant independent factor associated with C5 palsy. A multiple linear regression analysis indicated that the lamina open angle was associated with the space anterior to the spinal cord and the analysis identified the following equation: space anterior to the spinal cord (mm) = 1.54 + 0.09 × lamina open angle (degree). A cut-off value of 53.5° for the lamina open angle predicted the development of C5 palsy with a sensitivity of 72.7% and a specificity of 83.2%. Conclusions: The larger postoperative space anterior to the spinal cord, which was associated with the lamina open angle, was positively correlated with the higher incidence of C5 palsy.
AB - Purpose: The aim of the present study was to investigate the factors associated with C5 palsy by focusing on radiological parameters using multivariable analysis. Methods: The authors retrospectively assessed 190 patients with cervical spondylotic myelopathy treated by open-door laminoplasty. Four radiographic parameters—the number of expanded lamina, C3–C7 angle, lamina open angle and space anterior to the spinal cord—were evaluated to clarify the factors associated with C5 palsy. Results: Of the 190 patients, 11 developed C5 palsy, giving an overall incidence of 5.8%. Although the number of expanded lamina, lamina open angle and space anterior to the spinal cord were significantly larger in C5 palsy group than those in non-palsy group, a multiple logistic regression analysis revealed that only the space anterior to the spinal cord (odds ratio 2.60) was a significant independent factor associated with C5 palsy. A multiple linear regression analysis indicated that the lamina open angle was associated with the space anterior to the spinal cord and the analysis identified the following equation: space anterior to the spinal cord (mm) = 1.54 + 0.09 × lamina open angle (degree). A cut-off value of 53.5° for the lamina open angle predicted the development of C5 palsy with a sensitivity of 72.7% and a specificity of 83.2%. Conclusions: The larger postoperative space anterior to the spinal cord, which was associated with the lamina open angle, was positively correlated with the higher incidence of C5 palsy.
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U2 - 10.1007/s00586-017-5223-3
DO - 10.1007/s00586-017-5223-3
M3 - Article
C2 - 28733721
AN - SCOPUS:85025475560
VL - 26
SP - 2410
EP - 2416
JO - European Spine Journal
JF - European Spine Journal
SN - 0940-6719
IS - 9
ER -