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机构地区:[1]北京大学深圳医院放射科,518036 [2]北京大学第三医院介入血管外科,518036
出 处:《中华放射学杂志》2015年第1期16-19,共4页Chinese Journal of Radiology
摘 要:目的探讨糖尿病合并周围血管病变(PAD)患者的下肢骨骼肌CT灌注成像特征。方法前瞻性收集经CTA确诊为PAD,并按照患者是否合并糖尿病分为糖尿病PAD组和普通PAD组;同时收集行下肢CTA检查无异常者作为对照组。糖尿病PAD组27例(54条肢体),普通PAD组27例(54条肢体),对照组9名志愿者(18条肢体)。糖尿病PAD组54条肢体中,Fontaine分级I级10条、Ⅱ级21条、Ⅲ级14条、Ⅳ级9条。所有受检者均行双侧小腿骨骼肌灌注扫描。观察记录各组受试者的CT灌注扫描时间.密度曲线和及灌注参数,包括血流量(BF)、血容量(BV)、平均通过时间(MTT)和表面通透性(Ps)。采用方差分析比较糖尿病PAD组、普通PAD组和对照组CT灌注参数差异,并比较对照组和糖尿病PAD各Fontaine分级组肢体间灌注参数的差异。结果对照组正常骨骼肌的CT灌注时间一密度曲线持续上升,初期上升迅速;糖尿病PAD组和普通PAD组曲线继续上升但上升缓慢,缺血骨骼肌曲线斜率比对照组小、峰值低。对照组、糖尿病PAD组和普通PAD组BF值分别为(10_4l±0.92)、(13.37±1.15)和(17.12±0.81)ml·100ml^-1·min^-1,BV分别为(1.04±0.13)、(1.23±0.16)和(1.84±0.23)ml/L,MTT分别为(11.63±1.45)、(7.92±0.35)和(7.82±0.38)8,PS分别为(3.46±0.84)、(9.84±0.87)和(12.11±0.70)ml·100ml^-1·min^-1,3组间BF、BV、MTT和Ps值的差异均有统计学意义(F值分别为10.892、4.492、27.543和20.506,P均〈0.05)。对照组和糖尿病PAD各Fontaine分级间BF、BV差异无统计学意义(P均〉0.05);MTT和Ps间差异有统计学意义,其中对照组和糖尿病PAD各Fontaine分级组MTT、PS值差异均有统计学意义(P均〈0.05)。结论骨骼肌CT灌注成像能早期提示糖尿病合并PAD患者的下肢缺血,具有一定价值。raise slowly; the TDC of ischemia skeletal muscle has smaller slope and lower peak value than that of control group. The values of BF were ( 10.41±0.92 ) ml·100 ml^-1·min^-1 in control group, ( 13.37± 1.15 ) ml · 100 ml^-1· min^-1 in diabetic PAD group and(17.12.±0.81)ml·100 ml-j·min ^-1in common PAD group. The values of BV were (1.04± 0.13)ml/L in control group, (1.23 ±0.16)ml/L in diabetic PAD group and (1.84±0.23)ml/L in common PAD group. The values of MTT were (11.63.± 1.45 ) s in control group, (7.92.±0.35) s in diabetic PAD group and (7.82±0.38) s in common PAD group. The values of PS were (3.46±0.84) ml·100 ml^-1·min^-1 in control group, (9.84-±0.87) ml·100 ml^-1·min^-1 in diabetic PAD group and (12.11-±0.70) ml·100 ml^-1. min^-1 in common PAD group. The differences of the values of BF, BV, MTT and PS among the three groups were statistically significant ( F values were 10.892,4.492,27.543 and 20.506, P all〈0.05). The differences of the values of BF, BV among control group and all Fontaine classes in diabetic PAD group were not statistically signifieant(P all〉0.05), the differences of the values of MTT, PS were statistically significant. And the differences of the values of MTT, PS between control group and each Fontaine class in diabetic PAD were statistically significant (P all〈0.05).Conclusions CT perfusion imaging of Lower extremity skeletal muscle can prompt the existence of early skeletal muscle isehemia for diabetic PAD. The method can be valuable for clinical early diagnosis.
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