TY - JOUR
T1 - May-Thurner syndrome
T2 - Correlation between digital subtraction and computed tomography venography
AU - Kuo, Ying Sheng
AU - Chen, Chi-Jen
AU - Chen, Jiann Jy
AU - Lin, Cheng Hong
AU - Ku, Jan Wen
AU - Hsu, Hui Ling
AU - Tseng, Ying-Chi
N1 - Publisher Copyright:
© 2013.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - Background/Purpose: Digital subtraction venography (DSV) and computed tomography venography (CTV) are both recommended for diagnosing May-Thurner syndrome. The literature contains little information on the correlation between these imaging tools. We performed a retrospective case-series study to investigate this correlation. Methods: From August 2009 to August 2010, 42 patients with May-Thurner syndrome (34 women, 8 men; mean age: 52.8±13.5 years) received DSV followed by CTV. The DSV was used to evaluate the degree of venous reflux, reflux start-up time, and flow time. By CTV, the ratio of cross-sectional area and the ratio of diameter between the narrowest region to that of the caudal part of the left common iliac vein were calculated. The correlation between these variables for DSV versus CTV was calculated using Spearman's rank correlation coefficients. Results: In DSV evaluation of the extent of reflux, 19.0% of cases were classified as Grade 0, 11.9% as Grade I, 28.6% as Grade II, and 40.5% as Grade III. The mean±standard deviation flow times for these groups were 2.00±0.38 seconds, 1.75±0.29 seconds, 1.67±0.72 seconds, and 1.81±0.68 seconds, the mean time for total patients was 1.76±0.78 seconds. The reflux start-up times for Grades I-III were 2.00±1.00 seconds, 1.80±1.23 seconds, and 1.40±0.49 seconds, and the mean time was 1.6±0.8 seconds. In CTV, the mean area ratio and diameter ratio were 0.78±0.22 (range, 0.22-1.27) and 0.75±0.24 (range, 0.33-1.25). The reflux start-up time showed a positive correlation with the cross-sectional area ratio (r=0.518; p=0.002) and diameter ratio (r=0.413; p=0.019). Conclusion: The cross-sectional area ratio and diameter ratio in CTV correlate with the reflux start-up time in DSV. For May-Thurner syndrome, both CTV and DSV provide essential information for diagnosis and evaluation of the disease. The positive correlation between anatomical and hemodynamic properties corresponds with the underlying pathophysiology.
AB - Background/Purpose: Digital subtraction venography (DSV) and computed tomography venography (CTV) are both recommended for diagnosing May-Thurner syndrome. The literature contains little information on the correlation between these imaging tools. We performed a retrospective case-series study to investigate this correlation. Methods: From August 2009 to August 2010, 42 patients with May-Thurner syndrome (34 women, 8 men; mean age: 52.8±13.5 years) received DSV followed by CTV. The DSV was used to evaluate the degree of venous reflux, reflux start-up time, and flow time. By CTV, the ratio of cross-sectional area and the ratio of diameter between the narrowest region to that of the caudal part of the left common iliac vein were calculated. The correlation between these variables for DSV versus CTV was calculated using Spearman's rank correlation coefficients. Results: In DSV evaluation of the extent of reflux, 19.0% of cases were classified as Grade 0, 11.9% as Grade I, 28.6% as Grade II, and 40.5% as Grade III. The mean±standard deviation flow times for these groups were 2.00±0.38 seconds, 1.75±0.29 seconds, 1.67±0.72 seconds, and 1.81±0.68 seconds, the mean time for total patients was 1.76±0.78 seconds. The reflux start-up times for Grades I-III were 2.00±1.00 seconds, 1.80±1.23 seconds, and 1.40±0.49 seconds, and the mean time was 1.6±0.8 seconds. In CTV, the mean area ratio and diameter ratio were 0.78±0.22 (range, 0.22-1.27) and 0.75±0.24 (range, 0.33-1.25). The reflux start-up time showed a positive correlation with the cross-sectional area ratio (r=0.518; p=0.002) and diameter ratio (r=0.413; p=0.019). Conclusion: The cross-sectional area ratio and diameter ratio in CTV correlate with the reflux start-up time in DSV. For May-Thurner syndrome, both CTV and DSV provide essential information for diagnosis and evaluation of the disease. The positive correlation between anatomical and hemodynamic properties corresponds with the underlying pathophysiology.
KW - Computed tomography
KW - Digital subtraction venography
KW - May-Thurner syndrome
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U2 - 10.1016/j.jfma.2012.12.004
DO - 10.1016/j.jfma.2012.12.004
M3 - Article
C2 - 25839771
AN - SCOPUS:84925943258
SN - 0929-6646
VL - 114
SP - 363
EP - 368
JO - Journal of the Formosan Medical Association
JF - Journal of the Formosan Medical Association
IS - 4
ER -