[Application of digital subtraction angiography and type B ultrasonography in the evaluation of vascular injury in patients with high voltage electrical injury].
OBJECTIVE
To compare the difference between digital subtraction angiography (DSA) and type B ultrasonography in the evaluation of vascular injury in patients inflicted with high voltage electrical injury.


METHODS
Nineteen patients with high voltage electrical injury of upper limbs were enrolled in the study as burn group, and another 12 healthy volunteers as controls. The endovascular membrane, vascular wall thickness, intra-vascular blood flow and endovascular thrombosis formation of ulnar and radial arteries at wound site and in regions 5, 10 and 15 cm proximal to the wounds were examined by DSA and type B ultrasonography and compared with imagings of healthy volunteers as control. The injury degree of the ulnar and radial arteries was examined during operation for evaluation to corroborate with DSA and ultrasonography findings. Necrotic and/or thrombotic vessels were excised and sent for pathomorphological examination.


RESULTS
By DSA images abnormal signs as thrombosis, vascular lumen stenosis and blood flow deceleration were found in 14 ulnar and 11 radial arteries, and the signs were more pronounced in ulnar arteries. By type B ultrasonography, abnormal signs as roughing of tunica intima, swelling or exfoliation, thickening of vascular wall, lumen stenosis, decreased blood flow, even necrosis of vascular wall and thrombosis were identified in 19 ulnar and 16 radial arteries in burn group (P < 0.05 approximately 0.01). The blood flow in ulnar artery 5 cm to the approximal part of the wound edge was obvious lower than that of the control (31.60 +/- 13.90 ml/min vs 47.70 +/- 9.60 ml/min, P < 0.05).


CONCLUSIONS
Type B ultrasonography and DSA could be helpful in the evaluation of vascular injury in patients inflicted with high voltage electrical injury.
Li
Li-Gen
LG
Burn Institute, The 304th Hospital of PLA, Beijing 100037, P. R. China.
Chai
Jia-Ke
JK
Guo
Zhen-Rong
ZR
Chen
Yue-Xiu
YX
Ouyang
Zhong-Nan
ZN
Yang
Hong-Ming
HM
Jia
Xiao-Ming
XM
Lu
Xiao-He
XH
Hu
Xiao-Juan
XJ
D000328:Adult; D015901:Angiography, Digital Subtraction / Q000379:methods*; D002058:Burns, Electric / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017534:Radial Artery / Q000000981:diagnostic imaging / Q000293:injuries*; D017535:Ulnar Artery / Q000000981:diagnostic imaging / Q000293:injuries*; D018615:Ultrasonography, Doppler, Color / Q000379:methods*