MRI Measurements of the Cervical Spine and Their Correlation to Pavlov’s Ratio

Prasad, Sirikonda Siva; O’Malley, Michael J.; Caplan, Mark L.; Shackleford, Ian; Pydisetty, Ravi K.

doi:10.1097/01.brs.0000065570.20888.aa

Cited by 76 publications

(56 citation statements)

References 15 publications

(23 reference statements)

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“…A ratio of >1 was considered normal, whereas a ratio of <0.8 was considered to represent stenosis. However, some authors have recently reported a poor correlation between the space available for the cord measured on radiographs and the Pavlov ratio [8][9][10][11] . This raises the question of the T Disclosure: The authors did not receive any outside funding or grants in support of their research for or preparation of this work.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Cervical Spine Stenosis

Lee¹,

Cassinelli²,

Riew³

2007

The Journal of Bone & Joint Surgery

101

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Section: Discussionmentioning

confidence: 99%

Prevalence of Cervical Spine Stenosis

Lee¹,

Cassinelli²,

Riew³

2007

The Journal of Bone & Joint Surgery

101

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“…Esse dado foi semelhante ao encontrado na literatura mundial que considera o Índice de Torg um método diagnóstico de estenose do canal cervical 3,8,11,[13][14][15][16][17][18][19][20] . O índice de Torg eliminou o viés da magnificação radiológica da medida direta do canal vertebral, o qual era causado por diferenças da distância entre o paciente, o filme e o tubo de raio-X.…”

Section: Discussionunclassified

“…A RM é uma ferramenta hoje utilizada em todos os pacientes com sinais e sintomas de MCE 3,11,13 , por confirmar o diagnóstico, bem como documentar a extensão e a gravidade da lesão 3 . Na RM visibilizamos o sinal de necrose e morte de células do sistema nervoso central conhecido como Mielomalácea.…”

Section: Discussionunclassified

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Comparação do Índice de Torg obtido por meio de radiografia e ressonância magnética nos pacientes com mielopatia cervical espondilótica

et al. 2012

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OBJETIVO: A Mielopatia Cervical Espondilótica (MCE) é uma disfunção da medula espinhal relacionada à degeneração típica do envelhecimento. No estudo de imagem podemos obter a medida do Índice de Torg, para estimar a estenose cervical. Objetivamos, assim, medir o Índice de Torg através de radiografia e ressonância magnética (RM), possibilitando verificar possíveis discrepâncias entre os métodos de medida. MÉTODOS: Realizada mensuração do Índice de Torg na radiografia e na RM da coluna cervical, sendo obtido através da relação entre a superfície posterior do corpo vertebral e o ponto mais próximo à linha laminar correspondente, dividido pelo diâmetro sagital do corpo vertebral. RESULTADOS: Participaram 29 pacientes, sendo 10 mulheres e 19 homens, com médias de idade 48,1 ± 11 anos, de peso 68,7 ± 5 Kg e de altura 1,68 ± 0,6 m. Houve diferença significativa entre o Índice de Torg calculado através de radiografia e RM, sendo menores os índices observados na RM (radiografia: 0,73 ± 0,17 vs. RM: 0,48 ± 0,14, p< 0,05). No entanto, ambas as aferições traduzem o mesmo resultado: estenose cervical absoluta (Índice de Torg < 0,8). CONCLUSÕES: Nossos resultados corroboram relatos de outros autores que acreditam que o Índice de Torg medido através da radiografia, como preconizado, minimiza a real estenose do canal cervical. Sugerimos em nosso estudo que a RM permite melhor estimativa do grau de estenose do canal, muito embora nossos resultados em relação ao grau de estenose cervical tenham sido semelhantes estatisticamente.

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“…Studies [17] revealed that the average of antero-posterior diameter of the cervical spinal cord (APD2) varies between 5 mm and 6 mm. Our study found out an average of APD2 higher than 11.66 mm ± 0.66 with a variation from 9.1 mm ± 0.67 à 10.5 mm ± 1.5.…”

Section: Discussionmentioning

confidence: 99%

Biometrics of the Cervical Spinal Canal and Cord by Computer Tomography in Togo

Amadou¹,

Sonhaye²,

Apétsè³

et al. 2017

OJRad

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Studies on the canal dimensions of the cervical spinal are rare in Africa. The aim of this study is to provide normal values of the cervical spinal canal and spinal cord dimensions of adult people in Togo. It was about a twelve-year prospective study conducted in the main Hospitals of Campus Teaching Hospital. This study involved people of more than 18 years who neither presented any clinical sign nor rachis defect. The distances measured were antero-posterior 1 (APD1) and inter-pedicular (IPD) of the cervical spinal canal, the antero-posterior 2 (APD2) and the transverse (TD) diameters of the cervical spinal cord, followed with APD2/APD1 (R1) and TD/IPD (R2) research reports. The mean age was 38 +/− 9.34 years old. The average of APD1 of the cervical spinal canal stood at 15.41 ± 0.55 mm, with a minimum of 10.48 ± 0.57 mm and a maximum of 25.00 ± 2.60 mm. The IPD average stood at 23.27 ± 1.67 mm with a minimal average of 13.68 ± 1.46 mm and a maximal average of 33.68 ± 1.46 mm. The average of DAP2 was 11.66 ± 0.66 mm, with a minimum of 10.7 ± 0.66 mm and a maximum of 12.77 ± 0.66 mm. The DT average stood at 15.55 ± 1.54 mm, with a minimal average of 14.03 ± 2.43 mm and a maximal average of 17.63 ± 1.82 mm. The ratio R1 (APD2/APD1) average was 0.80 ± 0.04, with a minimum of 0.76 ± 0.06 and a maximum of 0.85 ± 0.07. The ratio R2 (TD/IPD) average stood at 0.69 ± 0.14, with a minimum of 0.5 ± 0.12 and a maximum of 0.84 ± 0.08. The cervical spinal canal and the cervical spinal cord diameters in Togo are not significantly different from those described above.

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MRI Measurements of the Cervical Spine and Their Correlation to Pavlov’s Ratio

Abstract: This study shows a poor correlation between Pavlov's ratio and the space available for the cord. Therefore, this ratio cannot be solely relied upon to predict the area changes in that plane of the cervical spinal canal.

Cited by 76 publications

References 15 publications

Prevalence of Cervical Spine Stenosis

Prevalence of Cervical Spine Stenosis

Comparação do Índice de Torg obtido por meio de radiografia e ressonância magnética nos pacientes com mielopatia cervical espondilótica

Biometrics of the Cervical Spinal Canal and Cord by Computer Tomography in Togo

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