限制性内翻剥脱联合TriVex旋切及泡沫硬化剂治疗下肢静脉曲张（附132例报告）

目的 探讨限制性内翻剥脱联合TriVex旋切及泡沫硬化剂治疗下肢静脉曲张的手术方法及技巧.方法 2010年2月~2012年2月,应用该方法治疗132例下肢静脉曲张,临床病因病理生理解剖分类系统（CEAP）分级为C2~5 Ep/As/Pr的患者.内翻剥脱大隐静脉主干至膝下水平,小腿曲张静脉团结合透光旋切（transilluminated powered phlebectomy,TIPP）及泡沫硬化剂治疗（foam sclerotherapy）.观察术后瘀斑、隐神经缺失、症状改善情况及术后复发率.结果 所有患者术后下肢静脉曲张消失,临床症状缓解,无严重并发症.术后1个月随访,6.1%（8/132）有隐神经缺失症状.术后1年随访,1.7%（2/117）有隐神经缺失症状.无复发病例.结论 限制性内翻剥脱联合TriVex旋切及泡沫硬化剂治疗下肢静脉曲张简单,微创,有效.     

透光直视旋切术与腔镜深筋膜下结扎交通支静脉在静脉性溃疡治疗中的疗效比较研究

目的比较透光直视旋切术(TriVex)与腔镜深筋膜下结扎交通支静脉(SEPS)治疗静脉溃疡的效果。方法将我院在2009年1月至2011年6月间收治的静脉溃疡患者根据住院单双号分为TriVex组和SEPS组。TriVex组行大隐静脉高位结扎、抽剥和TriVex静脉旋切系统旋切术,对溃疡周围浅静脉予完全刨除;SEPS组行大隐静脉高位结扎、抽剥和腔镜深筋膜下结扎交通支静脉,对小腿曲张静脉及溃疡周围静脉行点状抽剥术。比较两组患者在溃疡愈合率、愈合时间及术后溃疡复发率的差异。结果两组患者的溃疡愈合率、愈合时间及溃疡复发率比较,差异无统计学意义(P>0.05),且均未发生深静脉血栓形成等严重并发症,但SEPS组术后皮下淤血或局部皮肤麻木感等轻微并发症高于TriVex组,而患者满意率低于TriVex组,两组差异有统计学意义(P<0.05)。结论 TriVex和SEPS均可有效治疗静脉溃疡,但SEPS可能会出现更多的皮下淤血或局部皮肤麻木感等轻微并发症,患者对TriVex的满意度更高。     

大隐静脉高位结扎联合导管泡沫硬化剂治疗下肢静脉曲张

目的观察大隐静脉高位结扎联合数字减影血管造影(DSA)导管引导下的泡沫硬化剂治疗下肢静脉曲张的临床疗效。方法选取本院2012年10月至2013年4月下肢静脉曲张患者26例(26条患肢),大隐静脉高位结扎并在DSA导管引导下对患肢大隐静脉主干内注射1%聚桂醇泡沫硬化剂,观察大隐静脉主干的闭合情况。结果患者均在DSA导管引导下成功注射1%聚桂醇泡沫硬化剂,平均每条患肢应用26.5ml泡沫硬化剂。24例大隐静脉主干治疗后即可见反流消失。治疗2周及3个月后随诊下肢静脉超声示大隐静脉主干闭塞。患者下肢活动后酸胀、乏力感消失,大隐静脉走形迂曲、扩张、畸形静脉消失,无严重并发症发生。结论大隐静脉高位结扎联合DSA导管引导下泡沫硬化剂疗法是一种安全、有效、微创治疗大隐静脉曲张的方法,但其远期效果仍然需要进行进一步的随访观察。     

冷光源引导下泡沫硬化剂注射小腿曲张浅静脉在下肢静脉溃疡治疗中的应用探讨

目的探讨冷光源引导下泡沫硬化剂注射小腿曲张浅静脉联合腔镜深筋膜下交通支静脉离断术(SEPS)及大隐静脉高位结扎抽剥术治疗下肢交通静脉功能不全所致的静脉溃疡中的作用效果。 方法选取2012年6月至2013年5月就诊的42例(46条患肢)小腿交通静脉功能不全合并浅静脉曲张的静脉溃疡患者,行SEPS术及大隐静脉高位结扎抽剥术,并在SEPS术的冷光源引导下行小腿曲张静脉泡沫硬化剂注射术。 结果共注射263条曲张浅表静脉。随访期间所有患者静脉溃疡均愈合。9例患者的9条下肢(9/46,19.57%)在术后4周内出现局部疼痛,口服止疼药可缓解。22例患者的24条下肢(24/46,52.17%)共46条静脉(46/263,17.49%)在术后1 ~ 2周出现沿治疗曲张静脉行程的黄褐色色素沉着,于3 ~ 6个月内自行消失。3例患者3条下肢(3/46,6.52%)共11条静脉(11/263, 4.18%)在治疗后1周出现沿曲张静脉分布的红、热、痛和压痛,诊断为浅表性静脉炎,外用多磺酸黏多糖乳膏后缓解。经过注射的263条曲张静脉中,245条(245/263,93.16%)达到治疗成功标准,18条(18/263,6.84%)达到部分成功标准,无一条静脉未成功注射。 结论冷光源引导下的小腿曲张静脉泡沫硬化剂注射联合SEPS术及大隐静脉高位结扎抽剥术是良好的治疗交通静脉功能不全所致静脉溃疡的方法,其长期作用效果有待进一步观察。     

静脉剥脱联合硬化疗法治疗下肢静脉性溃疡

目的探讨大隐静脉高位结扎剥脱联合泡沫硬化剂注射对下肢静脉性溃疡的治疗效果。方法回顾性分析2013年7月~2015年8月收治的28例下肢静脉性溃疡患者临床资料,均行大隐静脉高位结扎剥脱联合泡沫硬化剂注射治疗。结果 28例患者成功接受大隐静脉高位结扎剥脱联合泡沫硬化剂注射术,平均手术时间为72(45~98)min,平均手术出血量为40(20~86)ml,平均每条肢体注射16(8~26)ml泡沫硬化剂,所有患者手术切口均一期愈合。术后活动性溃疡愈合27例(96.4%),平均愈合时间为15.8(10~28)d。1例溃疡面积较大者术后溃疡面积缩小后行植皮手术后愈合。3例患者术后小腿部曲张静脉附近呈现明显的炎症反应,予33%硫酸镁溶液湿敷后症状缓解,未出现下肢深静脉血栓形成等严重并发症。术后随访26例,平均11.6(3~26)个月,随访期间均未出现溃疡复发。结论大隐静脉高位结扎剥脱联合泡沫硬化剂注射治疗下肢静脉性溃疡安全、微创,临床效果满意。     

聚桂醇注射联合大隐静脉抽剥缝扎治疗下肢静脉曲张

目的:探讨国产聚桂醇注射联合大隐静脉抽剥缝扎治疗下肢静脉曲张的临床效果.方法:选择我院从2010年4月至2011年8月应用大隐静脉主干抽剥联合聚桂醇泡沫硬化剂治疗下肢静脉曲张47条肢体,观察大隐静脉曲张的治疗效果.结果:47条肢体中42条肢体治疗2周后曲张静脉完全闭塞;5条肢体残留少许曲张静脉,再次注射后闭塞;6个月后复诊均无明显复发.结论:国产聚桂醇泡沫硬化剂注射联合大隐静脉抽剥缝扎治疗下肢静脉曲张的临床效果满意,是微创治疗下肢静脉曲张的新方法.     

泡沫硬化剂注射术与大隐静脉剥脱术的近期疗效对照研究

目的 评价泡沫硬化剂注射术联合高位结扎术治疗下肢大隐静脉曲张的近期临床效果.方法 55例(55条肢体)下肢大隐静脉曲张患者随机分为两组:传统大隐静脉剥脱术组(A组,23例);大隐静脉高位结扎联合泡沫硬化剂注射术组(B组,32例),比较两组手术前后CEAP分级及静脉临床严重程度评分(VCSS)的变化.结果 A、B两组手术...     

超声监测下泡沫硬化剂治疗中度以上下肢静脉曲张疗效分析

目的 评价超声监测下泡沫硬化剂对中度以上下肢静脉曲张的治疗效果.方法 对32例临床分级C4～C6的患者实施大隐静脉高位结扎+腔镜下小腿交通静脉结扎+超声监视下大隐静脉主干及小腿曲张静脉泡沫硬化剂注射,通过随访评估症状的改善程度并用血管彩色多普勒超声对静脉闭塞情况进行观察.结果 32例患者共32条肢体(C4～C6)接受治疗.平均结扎小腿交通静脉3.2(1～5)条,每条肢体平均使用泡沫硬化剂27.5 ml.1例术后出现轻度胸闷但CT排除肺栓塞,4例曲张静脉附近呈现明显的炎性反应,3例局部存留迂曲静脉团块但超声多普勒检查未见血流信号,无脑缺血等严重并发症.术后平均随访4.8(1～10)个月,所有患肢术后静脉曲张消失,临床症状明显缓解.C5期9条患肢的溃疡均于术后3个月内愈合.结论 泡沫硬化剂注射可有效治疗中度以上下肢静脉曲张,联合腔镜下交通静脉结扎及大隐静脉高位结扎可以增加治疗的安全性.     

泡沫硬化剂联合静脉旋切术治疗严重下肢静脉曲张的疗效观察

目的探讨泡沫硬化剂联合静脉旋切术治疗严重下肢静脉曲张的临床疗效。 方法收集2014年1月至2017年12月深圳大学第一附属医院（深圳市第二人民医院）共49例严重下肢静脉曲张（C4~C6级）患者,分为联合组（33例）和对照组（16例）。两组患者均先行大隐静脉高位结扎剥脱术,联合组采用泡沫硬化剂联合静脉旋切术,对照组则采用静脉旋切术。对两组术中出血量、术后疼痛时间、开始下床时间、住院时间、术后水肿发生率、其他并发症发生率进行比较。 结果联合组与对照组在术中出血量、术后疼痛时间、住院时间上差异均有统计学意义（t=3.916、3.465、2.554,P=0.003、0.001、0.011）,在术后下床时间、术后水肿发生率、术后并发症发生率上差异无统计学意义（t=1.851,χ²=3.614、1.467,P=0.406、0.057、0.226）。 结论泡沫硬化剂联合静脉旋切术具有出血量少、术后恢复时间快、住院时间短等优点,可个体化用于严重下肢静脉曲张的临床治疗。     

微创次高位大隐静脉结扎加局部硬化剂注射术治疗大隐静脉曲张152例分析

目的介绍微创次高位大隐静脉结扎加局部硬化剂注射术治疗大隐静脉曲张。方法局部麻醉、腰麻、硬外麻醉下行微创次高位大隐静脉结扎152例186条肢体,术后次日行曲张大隐静脉及交通瓣膜功能不全的交通支近远侧浅静脉内硬化剂注射86例98条肢体。结果应用新方法治疗大隐静脉曲张152例186条肢体,均取得满意疗效,无并发症发生,平均住院时间3d。结论微创次高位大隐静脉结扎加局部硬化剂注射术安全、美观、术式简单,住院时间短,费用低,复发率低,效果满意。     

Vasopressor hormone response following mesenteric traction during major abdominal surgery

Background : We investigated the vasopressor hormone response following mesenteric traction (MT) with hypotension due to prostacyclin (PGI₂) release in patients undergoing abdominal surgery with a combined general and epidural anesthesia. Methods : In a prospective, randomized, placebo-controlled study we administered 400 mg ibuprofen (i.v.) in 42 patients scheduled for abdominal surgery. General anesthesia was combined with epidural anesthesia (T4-L1). Before as well as 5, 15, 30, 45, and 90 min after MT we recorded plasma osmolality, hemodynamics and measured 6-keto-PGFlα (stabile metabolite of PGI₂), TXB₂ (stabile metabolite of thromboxane A₂) active renin, and arginine vasopressin (AVP) plasma concentrations by radioimmunoassay. Catecholamine levels were assessed by high-pressure liquid chromatography (HPLC) with electrochemical detection. Results : Following MT, arterial hypotension occurred along with a substantial PGI₂ release. This was completely abolished by ibuprofen administration. Although plasma levels of 6-keto-PGF_1α (1133 (708) vs. 60 (3) ng/L, median (median absolute deviation), P=0.0001, placebo vs. ibuprofen) remained significantly elevated, blood pressure was restored within 30 min after MT in the placebo group. At the same point in time plasma concentrations of TXB² (164 (87) vs. 58 (1) ng/L, P=0.0001), epinephrine (46 (33) vs. 14 (6) ng/L, P=0.001), AVP (41 ± (18) vs. 12 (7) ng/L, P=0.0004), and active renin (27 (12) vs. 12 (4) ng/L, P = 0.001) were significantly higher in placebo-treated patients. Conclusion : Under combined general and epidural anesthesia arterial hypotension following MT due to endogenous PGI₂ release is associated with enhanced release of AVP, active renin, epinephrine and thromboxane A₂, presumably contributing to hemodynamic stability within 30 min after MT.     

A comparison of the inhibitory effects of four volatile anaesthetics on the metabolism of chlorzoxazone, a substrate for CYP2E1, in rabbits

Background: Halothane inhibits in vitro and in vivo activity of cytochrome P-450 (CYP) 2E1. There are several fluorinated volatile anaesthetics besides halothane, and most of them are defluorinated by CYP2E1. It is unclear whether other fluorinated anaesthetics inhibit the in vivo activity of CYP2E1.
Methods: We compared the inhibitory effects of therapeutic concentrations of four inhalational anaesthetics, halothane, enflurane, isoflurane, and sevoflurane, on chlorzoxazone metabolism in rabbits receiving artificial ventilation.
Results: All four inhalational anaesthetics decreased arterial blood pressure and increased plasma chlorzoxazone concentration. However, no significant differences in the plasma chlorzoxazone concentration were found between the four anaesthetics. The estimated chlorzoxazone clearance increased after beginning inhalation with all four agents, but no significant difference in clearance was noted between agents.
Conclusions: At therapeutic concentrations, the in vivo inhibitory effect on chlorzoxazone metabolism was similar for all four inhalational anaesthetics examined, even though their chemical characteristics and extent of hepatic metabolism differ considerably.     

A Teaspoon Pump for Pumping Blood with High Hydraulic Efficiency and Low Hemolysis Potential

Abstract: Virtually all blood pumps contain some kind of rubbing, sliding, closely moving machinery surfaces that are exposed to the blood being pumped. These valves, internal bearings, magnetic bearing position sensors, and shaft seals cause most of the problems with blood pumps. The original teaspoon pump design prevented the rubbing, sliding machinery surfaces from contacting the blood. However, the hydraulic efficiency was low because the blood was able to "slip around" the rotating impeller so that the blood itself never rotated fast enough to develop adequate pressure. An improved teaspoon blood pump has been designed and tested and has shown acceptable hydraulic performance and low hemolysis potential. The new pump uses a nonrotating "swinging" hose as the pump impeller. The fluid enters the pump through the center of the swinging hose; therefore, there can be no fluid slip between the revolving blood and the revolving impeller. The new pump uses an impeller that is comparable to a flexible garden hose. If the free end of the hose were swung around in a circle like half of a jump rope, the fluid inside the hose would rotate and develop pressure even though the hose impeller itself did not "rotate"; therefore, no rotating shaft seal or internal bearings are required.     

Is the recovery profile of mivacurium independent of the rate of decay of its plasma concentration in patients with normal plasma cholinesterase activity?

Background: The duration of action of muscle relaxants is poorly correlated to the rate of decay of their plasma concentration. The plasma concentration of mivacurium may rapidly decrease below its active concentration because of the extensive hydrolysis of mivacurium. By inflating a tourniquet on one upper limb for 3 min after the administration of atracurium, mivacurium or vecuronium, we studied the influence of the initial decline of their plasma concentration on their effect. Methods: In 50 patients anaesthetised with thiopental, isoflurane and fentanyl, the effect of bolus doses of 0.15 or 0.25 mg . kg^?1 mivacurium (MIV 15, MIV 25), 0.3 or 0.5 mg . kg^?1 atracurium (ATR 30, ATR 50) and 0.06 or 0.1 mg . kg^?1 vecuronium (VEC 06, VEC 10) were measured on both arms (evoked response of the adductor pollicis to train-of-four stimulation every 12 s), a tourniquet being applied on one arm just before and during 3 min after the muscle relaxant bolus. Results: Tourniquet inflation of 3 min almost abolished the neuromuscular effect of mivacurium. In the vecuronium groups and in the ATR 50 group, tourniquet inflation did not modify the maximum degree of depression of the twitch response. Also, the duration of action of vecuronium was unaffected by the tourniquet. In the ATR 30 group, times to return of the twitch response to 25% (duration 25%) and 75% (duration 75%) of control response were significantly shorter in the cuffed arm, 23 min vs 27 min, and 41 min vs 45 min, respectively. In the ATR 50 group, only duration 25% was significantly shorter in the cuffed arm (41 min vs 45 min). Conclusion: The results suggest that the rate of decline of the plasma concentration of mivacurium is so rapid, that a very low and almost clinically ineffective concentration is present as soon as 3 min after its administration. The results also indicate that the recovery from a mivacurium-induced neuromuscular blockade is not influenced by the rate of decay of its plasma concentration in patients with genotypically normal plasma cholinesterase.     

Membranes in Artificial Organs

Abstract: Membrane processes play a pivotal and enabling role in modern replacement therapy for acute and chronic organ failure and in the management of immunologic diseases. In fact, virtually all contemporary extracorporeal blood purification methods employ membrane devices, and the next generation of artificial organs and tissue engineering therapies are almost certain to be similarly grounded in membrane technology. In this short essay, we comment on the similarities and differences among synthetic membranes and their natural counterparts and also provide a critical overview of the demographics and technology of hemodialysis, hemofiltration, apheresis, oxygenation, and emerging membrane technologies and applications.     

Microspheres Based Detoxification System: A New Method in Convective Blood Purification

Abstract: A variety of protein-bound or hydrophobic substances, accumulating as a result of pathologic conditions such as exogenous or endogenous intoxications, are removed poorly by conventional detoxification methods because of low accessibility (hemodialysis), insufficient adsorption capabilities (hemosorption), low efficiency (peritoneal dialysis), or economic limitations (high-volume plasmapheresis). Combining advantages of existing methods with microspheric technology, a module-based system was designed. Major operating parameters of the latter can be modified to allow for adjustment to individual clinical situations. An extracorporeal blood circuit including a plasmafilter is combined with a secondary high-velocity plasma circuit driven by a centrifugal pump. Different microspheric adsorbers can be combined in one circuit or applied in sequence. Thus, a prolonged treatment can be tailored using specially designed selective adsorber materials. Comparing this system with existing methods (high-flux hemodialysis, molecular adsorbent recycling system), results from our in vitro studies and animal experiments demonstrate the superior efficiency of substance removal.     

Tissue perfusion in relation to cardiac output during continuous positive-pressure ventilation and administration of propranolol or verapamil

Background : Our objective was to determine whether administration of propranolol or verapamil modifies the hemodynamic adaptation to continuous positive-pressure ventilation (CPPV), in particular the regional distribution of cardiac output (CO).
Methods : General hemodynamics and regional blood flows assessed by microsphere technique (15 (μm) were recorded in 16 anesthetized pigs during spontaneous breathing (SB) and CPPV with 8 cm H₂O end-expiratory pressure (CPPV8) before and after intravenous administration of propranolol (0.3 mg · kg⁻¹ followed by 0.15 mg · kg⁻¹ · h⁻¹, n=8) or verapamil (0.1 mg · kg⁻¹ followed by 0.3 mg · kg⁻¹ · h⁻¹, n=8).
Results : CPPV8 depressed CO by 25% without shifts in its relative distribution with the exception of a noteworthy increase in adrenal perfusion. Propranolol increased arterial blood pressure, and due to a fall in heart rate, CO dropped by 25%. The kidneys and, to a lesser extent, the splanchic region and central nervous system received increased fractions of the remaining CO at the expense of skeletal muscle flow. Similar patterns were seen during SB and CPPV8 such that the combination of propranolol and CPPV8 depressed CO by 50%. The circulatory effects of verapamil were less evident but myocardial perfusion tended to increase.
Conclusions : The combination of propranolol or verapamil with CPPV does not result in any specific hemodynamic interaction in anesthetized pigs, except that the combined effect of propranolol and CPPV may severely reduce CO.     

Volatile anaesthetics reduce adhesion of blood platelets under low-flow conditions in the coronary system of isolated guinea pig hearts

Background : Inhibitory effects of volatile anaesthetics on platelet aggregation have been demonstrated in several studies. However, the influence of volatile anaesthetics on intracoronary platelet adhesion has not been elucidated so far.
Methods : Isolated hearts of guinea pigs were perfused with buffer in the absence or presence of volatile anaesthetics (0.5 and 1 MAC) at constant coronary flow rates of 5 ml/min for 25 min, then 1 ml/min for 30 min and again 5 ml/min for 10 min. Before, during and after low-flow perfusion, a bolus of human platelets was applied into the coronary system. To simulate thrombogenic conditions, 0.3 U/ml human thrombin was infused during low-flow perfusion and reperfusion. The number of platelets sequestered to the endothelium was calculated from the difference between coronary in- and output of platelets. The myocardial production of lactate and consumption of pyruvate and coronary perfusion pressure were also determined.
Results : At a flow rate of 5 ml/min only about 3% of the applied platelets did not emerge from the coronary system, in any group. In contrast, 13.1±1.2% (mean±SEM) of infused platelets became adherent in low-flow perfusion in the control group without anaesthetic. The adherence was reduced with each 1 MAC isoflurane (to 6.2±1.2%), sevoflurane (to 4.4±0.9%) or halothane (to 3.2±1.5%) (each P <0.05 vs. control). Volatile anaesthetic, 0.5 MAC, did not inhibit platelet adhesion to a statistically significant extent in any case. Perfusion pressure and metabolic parameters were not statistically different between the control and the hearts exposed to anaesthetics.
Conclusion : Volatile anaesthetics in a concentration of 1 MAC can reduce the adhesion of platelets in the coronary system under reduced flow conditions. This action does not arise from vasodilation or inhibition of ischaemic stress.     

Bariatric Surgery in Some "Central and East-European (former Eastern bloc)"Countries - Current Status and Prediction for the Next Millennium

Background: Obesity is increasing globallly, including in the formerly "Eastern Bloc" countries. Methods: A survey was made of obesity and bariatric surgery. Results: In the 8 East and Central European countries studied, with total population 300 million, roughly 43% of the population was overweight (BMI 25-30), 23% obese (BMI > 30), with about 15 million people morbidly obese (BMI > 40). From 0-10 morbidly obese individuals/100,000/year undergo bariatric surgery. Conclusion: Most countries were found to provide inadequate treatment for obesity.The majority of the morbidly obese are not treated effectively. However, health-care awareness of obesity and bariatric surgeons are slowly increasing.     

Dilemma of Membrane Biocompatibility and Reuse

Abstract: Numerous articles have been published on the multiple use of dialyzers and on the effect of different reprocessing chemicals and techniques on the dialyzer biocompatibility and performance. The results often appear contradictory, especially those comparing standard biocompatibility parameters. Despite this confusion, a discerning review of the published works allows certain limited conclusions to be drawn. Reprocessing of used hemodialyzers changes the biocompatibility profile of a dialyzer as defined by the parameters complement activation. leukopenia, and cytokine release. The effect of reprocessing depends on the chemicals and reprocessing technique applied and also on the type of membrane polymer being subjected to the reprocessing procedure. Reports of pyrogenic reactions indicate that the flux of the membrane also influences how suitable it is for safe reuse. An increased risk of allergic and pyrogenic reactions appears to be associated with dialyzer reuse. Furthermore, there has been a lack of investigations into the immunologic effect of the layer of adsorbed and chemically altered proteins that remains on the inner surface of reprocessed dialyzers. We conclude that the clinical benefit of dialyzer reuse cannot be generally accepted from a biocompatibility point of view.