ObjectiveTo evaluate the result of in situ great saphenouse vein bypass for the treatment of lower limb ischemia.MethodsFrom 1995 to 2000, 34 patients with femoro popliteal artery occlusive disease underwent in situ great saphenouse vein bypass using self made valvulotome in our hospital.The distal anastomosis was made on above knee popliteal artery in 3 cases, below knee popliteal artery in 16 cases, posterior tibial artery in 11 cases and anterior tibial artery in 4 cases, respectively.ResultsOn discharge, the rest pain disappeared in 26 cases and intermittent claudication disappeared in 7 cases, with average ankle/brachial index changing from 0 34(0～0 52) preoperatively to 0 78(0 48～1 2) postoperatively.The cumulative patency rate at 6,12,24,36 and 48 monthes were 91 18%?88 14%?84 99%?80 52%?80 52%,respectively.ConclusionIn situ great saphenouse vein bypass is effective for the treatment of lower limb arterial ischemia. The vein valve was disrupted successfully with self made valvulotome.
Objective:To investigate the clinical value of color Doppler flow imaging(CDFI) in diagonosis of perforating venous insufficiency of the lower extremity.Methods:The clinical data of 64 cases(82 limbs) undergoing high ligation and striping of great saphenous vein and perforator surgery were reviewed retrospectively.The dilated and insufficient perforating venous were diagnosed and located by CDFI.The results were compared with surgery.Results:Total consistent rate,sensitivity,specificity,omission diagonostic rate,mistake diagnositic rate,Youden index,Odd product,positive predictive value,negative predictive value,and Kappa of CDFI in diagnosis of perforating venous insufficiency of the lower extremity was respectively 95.8%、96.5%、88.2%、3.5%、11.8%、0.837、206.5、98.8%、71.4% and 0.766(P0.0001).The CDFI foundings were consistent with operation results very well.Conclusion:CDFI is a useful technique for the diagnosis and locating the dilated and insufficient perforating venous correctly and provide important basis for the operation.
To understand the new leaves combustibility of different garden woody species,combustion experiments of 11 woody species new leaves and 2 comparison trees old leaves were conducted during the peak fire season. The combustion experiments measured such factors as moisture content,mass area ratio, burning linear rates,burning area rates,burning mass loss rates,vein damage degree,area damage degree, mass damage degree,etc. The results showed that the burning rates and damage degree of Osmanthus fragrans,Chimonanthus praecox,Acer davidii,Liriodendron chinensis were stronger than the others,the difference of the remaining 7 kinds of plants burning rates and damage degree were not significant. The burning rates and damage degree of Exbucklandia populnea and Camptotheca acuminate were the lowest, the burning rates and damage degree of Osmanthus fragrans old leaves and Chimonanthus praecox old leaves were stronger than their new leaves.
Objective To observe the effects of astragalus injection on the expression of HIF-1α and VEGF in the cerebral tissue after focal cerebral ischemia reperfusion in rats.Methods Thirty male SD rats with average body weight of 260-300g were randomly divided into three groups: sham-operation group,ischemic model group and astragalus injection group.The model of the middle cerebral artery occlusion in rats was performed with the suture occlusion for two hours.The expression of HIF-1α and VEGF were detected by using reverse transcription-polymerase chain reaction(RT-PCR).Results Compared with sham-operation group,the expression of HIF-1α and VEGF increased in the ischemic model group,and compared with ischemic model group,astragalus injection could significantly raise the expression of HIF-1α and VEGF(P0.01 and P0.05,respectively).Conclusions These results suggested that the astragalus injection ccould significantly protect cranial nerve in ischemic penumbra around ischemia reperfusion cerebral tissue in rats.It may through up-regulating the expression of HIF-1α and VEGF.
OBJECTIVE The discussion of risk factors of affecting the long-term patency ratio of stent planted in arteriosclerosis subclavian artery. METHODS To analyse the correlation between preprocedural white blood cell count, antiplatelet agents therapy, residual stenosis in the stent, the preprocedural lesion degree of subclavian artery, serum lipid, blood sugar, blood press et al, and long-term patency of stent by Logistic regression. To explore the significant difference in preprocedural white blood cell count (WBC), antiplatelet agents therapy, residual stenosis, the preprocedural lesion degree of subclavian artery, serum lipid, blood sugar, blood press and so on between non-patency group (15 patients) and patency group (139 patients). To compare the significant difference of patency ratio of stent at the end of the survey between higher WBC (> 7.08 × 10⁹/L) group (45 patients) and lower WBC (≤ 7.08 × 10⁹/L) group (109 patients) by χ²-test. RESULTS Among 154 stents planted in subclavian artery, the patency ratio of 1-year was 96.1% (148/154), and that of 3-year was 88.5% (69/78). The risk factors of the descended patency ratio of stent are respectively the increasing preprocedural white blood cell count, no antiplatelet agents therapy and residual stenosis [OR 3.135 (P < 0.001, 95%CI 1.781 - 5.519); OR 5.818 (P = 0.005, 95%CI 1.688 - 20.057) and OR 5.253 (P = 0.014, 95%CI 1.391 - 19.838)]. There is the significant difference in preprocedural WBC between non-patency group and patency group (t = -5.008, P < 0.001, (8.15 ± 1.59) × 10⁹/L (5.25 × 10⁹/L - 10.75 × 10⁹/L) vs (6.01 ± 1.36) × 10⁹/L (4.07 × 10⁹/L - 8.11 × 10⁹/L). And there are the significant differences in antiplatelet agents therapy and residual stenosis between them (P = 0.002 and P = 0.025). At the end of the survey, the patency ratio of stent in subclavian artery of higher and lower WBC group is respectively 71.1% (32/45) and 98.2% (107/109) (P < 0.01). CONCLUSION It's sustainable antiplatelet agents therapy and decreased residual stenosis the stent that key elements to improve the long-term patency ratio of stent planted in subclavian artery. In addition, pay attention to that increasing white blood cell disturbs the long-term patency ratio of stent.
Objective To investigate the clinical value of color Doppler ultrasound examination in the diagonosis of acute and chronic artery occlusion of the extremities. Methods A review was made on 129 extremetiy artery occlusion patients at Anzhen Hospital during 2006 -2010. 85 cases were male, and 44 cases were female. Age was from 17 to 94 years (average: 62 ±9 years). We analyzed two-dimensional and color Doppler flow imagings of 39 acute occlusion arteries and 97 chronic occlusion arteries. We compared factors including the echoes of artery lumens, the vessel wall structures, hemodynamic parameters of inlet and outlet at the occlusion, and collaterals between groups. Results The factors of depths of vessel wall,internal diameters of ccclusion arteries, proximal resistant index and collaterals were significantly different between groups ( P ＜ 0. 05 ). The internal diameters of acute occlusion arteries were wider than chronic occlusion arteries. The depths of vessel wall, proximal resistant index and collaterals were thinner, smaller,and less than chronic occlusion arteries. The total accurate rate of differential diagnosis for acute and chronic artery occlusion by color Doppler ultrasound was 95.6％. Conclusions Color Doppler ultrasound is an effective method for the differential diagnosis of acute and chronic artery occlusion of the extremities.
Key words:
Ultrasonography, Doppler, color; Arterial occlusive disease; Extremities
Objective To study relationship between preprocedural white blood cell count(WBC) and long-term patency of stent implanted in the subelavian artery.Methods Data of 113 cases with stents implanted in the atherosclerotic SUbclavian arteries in Anzhen Hospital,Beijing during January 2005 to January 2008 were analyzed.Student t-test was used to compare the difierence in WBC count between those with patency and those with stenosis after the procedure and chi-square test was used to compare the difference in stent pateney between those with higher and lower WBC counts.Results There Was significant difference in WBC counts between 102 cases with patency and 11 cases with stenosis of the stents after implantation(t=-5.051.P 7.195×109/L)was significantly higher than that in 77 cases with lower WBC count(≤7.195× 109/L)before the procedure(P=0.001).Among 113 cases with stents implanted,109 cases(96.5%) could keep their stents patent one year after implantation,and 60 cases(89.6%)could keep stents patent three yeats after implantation.Conclusions In addition to those traditional factors associated with long-term patency of stents after their implantation,inereased WBC count alSO associated with stenosis or occlusion of the stents after the procedure.
Key words:
Stents; Subclavian artery; Arteriosclerosis; Inflammation; Leukocytes
Objective To evaluate the different value of color Doppler ultrnsonography and Doppler vascular examinations in diagnosis for deep venous thrombosis(DVT)in the lower extremities.Methotis Imaging of color Doppler ultrasound scanning was employed as diagnostic criteria for DVT on 178 lower extremities of 146 suspected patients,as compared to the result by Doppler vascular examinations.Results Color Doppler ultrasonograph showed hish accuracy in diagnosis for DVT,as compared to that by Doppler vascular examination with 97.9 percent(142/145)positive for the femoral and popliteal veins and relatively lower positive diagnostic vallie for thrombosis in the inferior vena cava,iliac vein,anterior tibial vein,posterior tibial vein and calf veins.Conclusions Color Doppler ultrasonography is superior to Doppler vascular examination in determining DVT of the lower extremities and can be used as a main diagnostic method for it.Doppler vasculiar examination can be used as an initial screening method for DVT and deep venous angiography should not be used as a routine diagnostic measure for it.
Key words:
Utrasonography,Doppler,color; Peripheral vascular disease; Lower extremity; Venous thrombosis
Objective To explore segmantal blood pressure ratio in Doppler ultrasound in the evaluation of distal outlets in lower extremity atherosclerosis ocllusion patients undergoing blood vessel prosthesis and provide references to surgical indications. Methods A review research was made on 166 lower extremity atherosclerosis ocllusion patients receiving blood vessel prosthesis therapy in Anzhen hospital in 1998--2005. We analyzed related factors including segmantal blood pressure ratio to potency rate, evaluated the difference of segmantal blood pressure ratio between groups in which the blood vessel prosthesis was patent and that it was not. Results The difference of segmantal blood pressure ratio of outlet is one of the highest risk among risk factors. The Mean ± SDs of segmantal blood pressure ratio of outlet in patent and obstructed groups were 0. 12±0. 09 and 0. 24±0. 14 respectively. The difference of segmantal blood pressure ratio of outlet has a significant difference between the two groups ( P = 0. 001 ). The corresponding 95% confidence interval of patent group is (0,0. 27). Conclusion Doppler ultrasound is a quantitative testing method. The confidence interval of the difference of segmantal blood pressure ratio could be used as the primary reference standard for the assessment of the outlet and to expect the potency rate before the vascular surgical procedures.
Key words:
Arteriosclerosis obliteraas; Ultrasonography, Doppler; Blood vessel prosthesis; Vascular surgical procedures; Segmantal blood pressure
Objective To evaluate the diagnosis of and management for pseudo-high blood pressure in patients with lower limb ischemia. Methods From March 2006 to March 2007, 182 cases with lower limb ischemia were admitted, and they were divided into three groups. In group 1 pseudo-high blood pressure did not exist, in group 2, patients had pseudo-high blood pressure with ABI<1.3, in group 3, patients had pseudo-high blood pressure and with ABI≥1.3. ABI and TBI were compared with color Doppler, angiography, MRA and CTA. Results In all those 182 patients, there were 102(56.0%)cases having no pseudo-high blood pressure, and 27.5% with concomitant diabetes. Seventy-two cases(39.6%) had pseudo-high blood pressure (ABI<1.3) with 44.4% having diabetes. Eight cases (4.4%) (ABI≥ 1.3) manifested pseudo-high blood pressure with the ratio concomitant diabetes being 75%. Conclusions In diabetic patients with lower limb's ischemia there is increased ratio of pseudo-high blood pressure.
Key words:
Arteriosclerosis obliterans; Diagnosis, differential; Ankle brachial index
'/%3e%3cuse xlink:href='%23a' transform='rotate(23.036 .093 25.536)'/%3e%3cuse xlink:href='%23a' transform='rotate(45.87 1.273 16.18)'/%3e%3cuse xlink:href='%23a' transform='rotate(69.945 .996 12.078)'/%3e%3cuse xlink:href='%23a' transform='rotate(20.66 -19.689 31.932)'/%3e%3c/svg%3e)