巨块型肝癌合并门静脉癌栓的治疗：附15例报告

目的　探讨外科手术、肝动脉化疗栓塞及联合或不联合门静脉灌注化疗治疗巨块型肝癌伴门静脉癌栓的效果。方法　 15例伴有门静脉癌栓的巨块型肝癌 ,均采用切除原发癌灶并取尽癌栓治疗 ,其中 5例患者留置门静脉化疗泵 ,术后 2周行肝动脉化疗栓塞或联合门静脉化疗。结果　全组术后无严重并发症发生。 6,12 ,18个月生存期分别为 10 0 % (15 /15 ) ,80 .0 % (12 /15 ) ,60 .0 %(9/15 )。结论　手术仍是治疗巨块型肝癌合并门静脉癌栓的有效方法 ,手术后辅以介入为主的综合治疗能有效提高生存率。     

原发性肝癌合并门静脉癌栓86例治疗体会

目的探讨肝癌合并门静脉癌栓(PVTT)的有效治疗方法。方法 86例肝癌合并门静脉癌栓患者行肝切除+门静脉取栓+肝动脉、门静脉双灌注化疗栓塞及生物靶向治疗。结果 1年生存率为90%,2年生存率为85%,3年生存率为35%;结论肝切除+门静脉取癌栓+肝动脉、门静脉双灌注化疗栓塞+生物靶向治疗是治疗肝癌合并门静脉癌栓的有效治疗方法。     

原发性肝细胞癌合并门静脉癌栓的外科治疗

目的 探讨原发性肝细胞癌合并门静脉癌栓的外科治疗方法。方法采用肝叶切除及经门静脉残端或主干切开取癌栓治疗32例PHCC合并PVTT,12例术后联合门静脉、肝动脉介入化疗,对其临床资料进行总结分析。结果1、本组病例术中出血量、输血量、肝门阻断次数时间、并发生率、手术死亡率与同期50例无癌栓肝癌切除组比较无显著性差异（P〉0．05）。2、随访26例,术后复发时间为2m～28m,术后是否化疗对复发时间有显著影响;1、2、3年生存率分别为46．2％、38．5％、15．4％;术后化疗、术前肝功能状况对生存期有显著影响。结论肝叶切除＋经门静脉断端或／和主干切开取癌栓是治疗肝癌合并门静脉癌栓最有效的方法,改善术前肝功能及术后联合化疗对延缓复发、提高生存率意义重大;对于难以切除的PHCC合并PVTT应争取行TACE术,仍有二期手术切除的机会。     

原发性肝癌伴门静脉癌栓的治疗方式探讨

目的　探讨原发性肝癌 (HCC)伴门静脉癌栓 (TTPV )的有效治疗方式。方法　回顾性分析和总结 1995年 1月至 2 0 0 3年 5月期间收治的 95例原发性肝癌伴门静脉癌栓患者的临床资料。结果　 5 8例行手术治疗 ,其中 6例行单纯肝肿瘤切除术 ,1、3年生存率为 3 3 .3 %、0 % ;5 2例行肝肿瘤切除加门静脉癌栓取栓术 ,其中 43例术后采用了肝动脉和门静脉双插管微量泵灌注化疗 ,其 1、3、5年生存率为 10 0 %、5 5 .8%、13 .9% ,9例未行插管化疗 ,1、3、5年生存率为 77.7%、2 2 .2 %、0 %。另 3 7例未行手术者中 10例行单纯肝动脉栓塞 (HAE) ,1、3年生存率为 2 0 %、0 % ;2 1例行选择性门静脉栓塞 (SEPV)联合肝动脉栓塞 ,1、3、5年生存率为 71.4%、2 8.6%、9.5 % ;6例未作任何治疗者均 1年内死亡。结论　手术治疗原发性肝癌伴门静脉癌栓有效 ,术后使用肝动脉和门静脉双插管灌注化疗可提高疗效 ,选择性门静脉栓塞联合肝动脉栓塞对不能切除的肝癌伴门静脉癌栓有重要作用     

原发性肝癌并门静脉癌栓的肝动脉化疗栓塞治疗

目的评价经肝动脉化疗栓塞术治疗原发性肝癌并门静脉癌栓的疗效和安全性。方法原发性肝癌并门静脉癌栓患者83例,其中53例行肝动脉化疗栓塞术(栓塞组),30例行肝动脉化学药物灌注(对照组)。对两组的疗效和并发症进行比较。结果经介入治疗后,栓塞组患者 6、12、24、36个月的生存率分别为97．8％、85．2％、45．8％、4．4％,均高于对照组(37．6％、5．3％、0、0． P均<0．01)。两组患者术后并发症的发生率差异无统计学意义。结论原发性肝癌并门静脉癌栓行经肝动脉化疗栓塞术较化疗灌注术的疗效好。     

门静脉灌注化学治疗药物治疗肝癌伴门静脉癌栓的临床价值

目的：探讨肝细胞肝癌伴门静脉癌栓（portal vein tumor thrombi,PVTT)外科手术后，门静脉灌注化学药物治疗的价值。方法：本组45例伴门静脉主干或I级分支癌栓的肝癌患者，在行手术切除后随机分为两组，一组行肝动脉化疗，同时行门静脉置泵灌注化疗（治疗组），另一组行肝动脉化疗（对照组）。结果：治疗组6个月，12个月，18个月的生存率分别为86％（18例），76％（16例），48％（10例）；对照组为75％（18例），58％（14例），33％（8例）。两组比较差异有显著意义（P＜0．05）。结论：肝癌伴PVTT手术切除术后，为防治门静脉癌栓导致肝内转移，复发，术中除应尽量取净癌栓组织外，门静脉灌注化疗是有效的措施之一。     

原发性肝癌合并门静脉癌栓的外科治疗方式选择

目的探讨原发性肝癌(HCC)合并门静脉癌栓(TTPV)的外科治疗方式选择。方法对1990年1月至2003年1月期间收治的138例肝癌合并门静脉癌栓患者的临床资料进行分析和总结。结果37例行保守姑息治疗患者1至8个月内死亡,平均生存时间3．9个月。101例患者行手术治疗,其中23例行单纯肝癌切除术,平均生存时问10．9个月;78例采取各种手术方式行肝癌切除加门静脉癌栓取栓术,平均生存时间26．8个月。其中52例术后采用了肝动脉和门静脉双插管微量泵灌注化疗,其1、3、5年生存率为96．2％、51．9％、11．5％,26例未行插管化疗,1、3、5年生存率为76．9％、23．1％、0％。结论手术治疗比保守治疗能相对延长肝癌合并门静脉癌栓患者的生存时间;手术在切除肝癌的同时应尽量使用各种方式取出门静脉癌栓;术后使用肝动脉和门静脉双插管微量泵灌注化疗可有效提高治疗效果。     

可切除肝细胞肝癌并门静脉主支癌栓治疗策略的安全性和有效性分析

目的。探讨肝功能代偿期手术切除或TACE治疗肝细胞肝癌（HCC）合并门静脉主支癌栓的疗效,以及TACE后选择性肝切除术的安全性。方法选择肝功能Child．PughA可切除的原发性肝癌并门脉主支癌栓患者116例,并分为手术组（56例）和肝动脉化疗栓塞组（TACE组,60例）,其中TACE组治疗后肿瘤反应评价有效,接受进一步手术治疗的患者纳入TACE＋手术组。对比3组患者的治疗效果和生存情况。结果手术组1例术中死亡（1／56,1．78％）,并发症发生率高于TACE组（16／56US7／60,P=0．010）。手术组、TACE组和TACE＋手术组的中位生存时间为11．41、15．34、22．01个月,TACE＋手术组的生存时间明显长于手术组（P=0．040）。手术组1、2、5年生存率分别为47．27％、24．58％、5．67％;TACE组分别为53．91％、27．18％、6．34％：TACE＋手术组分别为79．17％、45．83％、16．67％。多因素分析提示肝硬化、肿瘤位置是患者独立预后相关因素。结论HCC合并门静脉主支癌栓肝功能代偿良好可切除者,首治TACE后选择性肝切除术是更安全和有效的治疗策略。     

高能聚焦超声治疗肝细胞癌性门静脉癌栓的近期疗效对比

晚期肝癌多在门静脉主干或主要分支内形成癌栓,门静脉癌栓(portal vein tumor thrombus,PVTT)出现后易发生肝内播散转移[1],严重影响患者的预后.目前治疗PVTT的方法多为手术切除+癌栓取出术或配合肝动脉和(或)门静脉插管栓塞化疗(transcatheter arterial chemoembolization,TACE),均为有创性治疗.自2005年9月,我们应用高能聚焦超声(high intensity focused ultrasound,HIFU)治疗17例肝细胞癌性PVTT患者,取得了较好的近期疗效,现报道如下.     

肝癌合并门静脉癌栓的外科治疗

肝癌容易侵犯门静脉形成癌栓,文献报道尸检和影像学检查,门静脉癌栓(portal vein tumorthrombus,PVTT)的发生率约20%~70%,而手术切除标本镜检发生率更高。PVTT不仅引起肿瘤细胞的肝内播散和转移,还可以加重肝硬化患者门脉高压,引起上消化道大出血,甚至肝功能衰竭。门脉主干及主要分支癌栓患者自然生存时间仅3个月。近年来,对PVTT治疗的认识趋于更积极,针对PVTT的各种治疗方法如手术切除加门静脉插管化疗、介入化疗栓塞、放射治疗、超声引导下毁损治疗等层出不穷,但各种治疗的疗效报道差别很大,结论缺乏可比性。总的来说,部分患者经过…     

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 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.     

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.     

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.     

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.     

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.     

Synergistic interaction between the effects of propofol and midazolam with fentanyl on phrenic nerve activity in rabbits

Background: It has been shown that the depressive effects of both propofol and midazolam on consciousness are synergistic with opioids, but the nature of their interactions on other physiological systems, e. g. respiration, has not been fully investigated. The present study examined the effect of propofol and midazolam alone and in combination with fentanyl on phrenic nerve activity (PNA) and whether such interactions are additive or synergistic. Methods: PNA was recorded in 27 anaesthetised and artificially ventilated rabbits. In three groups, propofol, fentanyl and midazolam were administered intravenously in incremental doses to construct dose-response curves for the depressant effects of each one on PNA. In another two groups, the effect of pretreatment with either fentanyl 1 μg · kg^?1 i. v. or midazolam 0.05 mg · kg^?1 i. v. on the effects of propofol and fentanyl respectively on PNA were studied. Results: Propofol and fentanyl caused a dose-dependent depression of PNA with complete abolition at the highest total doses of 16 mg · kg^?1 i. v. and 32 μg · kg^?1 i. v., respectively. In contrast, midazolam in incremental doses to a total of 0.8 mg · kg^?1 reduced mean PNA by 63%, but approximately 12% of PNA remained at a total dose as high as 6.4 mg · kg^?1. The mean ED₅₀s, calculated from dose-response curves, were 5.4 mg · kg^?1, 3.9 μg · kg^?1 and 0.4 mg · kg^?1 for propofol, fentanyl and midazolam, respectively. Initial doses of either fentanyl 1 μg · kg^?1 i. v. or midazolam 0.05 mg · kg^?1 i. v. acted synergistically with subsequent doses of either propofol or fentanyl to abolish PNA at total doses of 8 mg · kg^?1 and 8 μg · kg^?1, respectively. Conclusion: Fentanyl has a synergistic interaction with both propofol and midazolam on PNA and hence potentially on respiration.     

Influence of dopexamine hydrochloride on haemodynamics and regulators of circulation in patients undergoing major abdominal surgery

Background: Catecholaminergic support is often used to improve haemodynamics in patients undergoing major abdominal surgery. Dopexamine is a synthetic vasoactive catecholamine with beneficial microcirculatory properties. Methods: The influence of perioperative administration of dopexamine on cardiorespiratory data and important regulators of macro- and microcirculation were studied in 30 patients undergoing Whipple pancreaticduodenectomy. The patients received randomized and blinded either 2 μg · kg^?1 · min^?1 of dopexamine (n=15) or placebo (n=15, control group). The infusion was started after induction of anaesthesia and continued until the morning of the first postoperative day. Endothelin-1 (ET-1), vasopressin, atrial natriuretic peptide (ANP), and catecholamine plasma levels were measured from arterial blood samples. Measurements were carried out after induction of anaesthesia, 2 h after onset of surgery, at the end of surgery, 2 h after surgery, and on the morning of the first postoperative day. Results: Cardiac index (CI) increased significantly in the dopexamine group (from 2.61±0.41 to 4.57±0.78 1 · min^?1 · m^?2) and remained elevated until the morning of the first postoperative day. Oxygen delivery index (DO₂I) and oxygen consumption index (VO₂I) were also significantly increased in the dopexamine group (DO₂I: from 416±91 to 717±110 ml/m² · m²; VO₂I: from 98±25 to 157±22 ml/m² · m²), being significantly higher than in the control group. pHi remained stable only in the dopexamine patients, indicating adequate splanchnic perfusion. Vasopressive regulators of circulation increased significantly only in the untreated control patients (vasopressin: from 4.37±1.1 to 35.9±12.1 pg/ml; ET-1: from 2.88±0.91 to 6.91±1.20 pg/ml). Conclusion: Patients undergoing major abdominal surgery may profit from prophylactic perioperative administration of dopexamine hydrochloride in the form of improved haemodynamics and oxygenation as well as beneficial influence on important regulators of organ blood flow.     

Systemic analgesia adapted to the children's condition

A concept of balanced analgesia using nonsteroidal anti-inflammatory drugs (NSAIDs), paracetamol (acetaminophen), opioids, and corticosteroids can also be used in patients with pre-existing illnesses. NSAIDs are the most effective treatment for acute pain of moderate intensity in children; however, these drugs should be avoided in patients at increased risk for serious side effects, e.g. patients with renal impairment, bleeding tendency, or extreme prematurity. NSAIDs can be given with minimal risks to the younger child with mild to moderate asthma, and, in these patients, the use of steroids can be encouraged; in addition to their antiemetic and analgesic action, a beneficial effect on asthma symptoms can be expected. In the non-intubated child with cerebral trauma, exaggerated sedation caused by opioids and increased bleeding tendency caused by NSAIDs must be avoided. In neonates and small infants, the oral administration of sucrose or glucose is helpful to minimize pain reaction during short uncomfortable interventions.