Correlative analysis of cervical curvature and atlantoaxial instability / 中国骨伤

OBJECTIVE@#To investigate the correlation between the changes of cervical curvature and atlantoaxial instability.@*METHODS@#The correlation between the changes of cervical curvature and atlantoaxial instability was retrospectively studied in 50 outpatients with abnormal cervical curvature (abnormal cervical curvature group) from January 2018 to December 2019. There were 24 males and 26 females in abnormal cervical curvature group, aged from 18 to 42 years old with an average of(30.62±5.83) years. And 53 patients with normal cervical curvature (normal cervical curvature group) during the same period were matched, including 23 males and 30 females, aged from 21 to 44 years with an average of(31.98±6.11) years. Cervical spine X-ray films of 103 patients were taken in lateral position and open mouth position. Cervical curvature and variance of bilateral lateral atlanto-dental space(VBLADS) were measured and recorded, Pearson correlation coefficient analysis was used to study the correlation between the changes of cervical curvature and atlantoaxial instability.@*RESULTS@#Atlantoaxial joint instability accounted for 39.6%(21/53) in normal cervical curvature group and 84.0%(42/50) in abnormal cervical curvature group. There was significant difference between two groups(P<0.01). VBLADS in abnormal cervical curvature group was (1.79±1.01) mm, which was significantly higher than that in normal cervical curvature group(0.55±0.75) mm(P<0.01). Pearson correlation coefficient analysis showed that the size of cervical curvature was negatively correlated with VBLADS.@*CONCLUSION@#Cervical curvature straightening and inverse arch are the cause of atlantoaxial instability, the smaller the cervical curvature, the more serious the atlantoaxial instability.

Application value of high-frequency ultrasound on the diagnosis of rotator cuff tears / 中国骨伤

<p><b>OBJECTIVE</b>To study the diagnostic value of high frequency ultrasound in diagnosing rotator cuff tears.</p><p><b>METHODS</b>Total 37 patients (37 shoulders) with rotator cuff tears were detected by ultrasound, MRI examination and arthroscopy retrospectively. Among the patients,21 patients were male and 16 patients were female. The average age was 64 years old (ranged, 51 to 75 years old). High frequency ultrasonography and MRI were applied to exam the shoulder under the standardizeds to point types and compare with arthroscopy results.</p><p><b>RESULTS</b>Thirty-two shoulders were diagnosed as rotator cuff injury by ultrasound, and 5 shoulders were detected as normal rotator cuff by ultrasound. Twenty-nine shoulders were diagnosed as rotator cuff injury by MRI, and 8 shoulders were detected as normal rotator cuff by MRI. Thirty-three shoulders were diagnosed as rotator cuff injury during the operation, and 4 shoulders were regarded as rotator cuff during the operation. The sensitivity of ultrasound diagnosis was 93.4% (31/33), and specific degree was 75.0%(3/4). The sensitivity of MRI diagnosis was 87.5% (28/32), and specific degree was 80.0% (4/5).</p><p><b>CONCLUSION</b>High frequency ultrasound in the diagnosis of rotator cuff tears injuries has a high sensitivity and specificity. High frequency ultrasound can be used as a routine method to diagnose rotator cuff tears injuries.</p>