肝胰岛细胞联合移植的临床应用(附1例报告)

目的 评估肝胰岛细胞联合移植治疗终末期肝病和糖尿病的可行性和疗效. 方法 对1例原有2型糖尿病史的原发性肝癌、肝炎肝硬化患者,施行肝移植的同时进行胰岛细胞经门静脉肝内移植,观察移植肝功能的变化,移植前后C肽、糖化血红蛋白的变化. 结果 患者胰岛素的注射量术前40~60 U/d,术后第45天降至20-30U/d,术后7月完全脱离胰岛素,血糖保持在正常范围. 结论 对肝脏功能衰竭的糖尿病患者施行肝胰岛细胞联合移植是可行而有效的.     

胰肾联合移植治疗1型糖尿病合并终末期肾病1例报告并文献复习

目的探讨胰肾联合移植治疗糖尿病合并终末期肾病的手术方式及移植效果。方法对1例1型糖尿病合并糖尿病肾病、尿毒症患者施行胰肾联合移植手术,将肾脏移植于左侧髂窝,胰腺移植于右侧髂窝,胰腺移植采用胰腺外分泌肠道引流、内分泌体循环系统回流的术式(肠道-体循环回流术式);术后常规给予免疫抑制、防治感染、支持等治疗。结果受者手术顺利。联合移植后胰、肾均发挥正常功能,血清肌酐逐渐恢复正常水平,血糖趋于稳定,第14日完全停用胰岛素及降糖药物。无严重手术并发症发生,受者健康存活,门诊随访移植胰腺、肾脏功能正常。结论胰肾联合移植是治疗1型糖尿病合并终末期肾病的理想方法 。     

改良式胰肾联合移植1例并文献复习

目的探讨改良式胰肾联合移植治疗2型糖尿病合并终末期肾病的移植效果。方法为1例2型糖尿病合并终末期肾病患者行改良式胰肾联合移植,其中移植胰腺的外分泌采用胰液空肠内引流术式,将供胰十二指肠节段与受体上段空肠直接行侧侧吻合。结果术后围手术期移植肾稳定泌尿,3800～4500ml/24h,3d后血清肌酐降至正常水平。术后胰腺功能恢复顺利,血、尿淀粉酶逐渐下降并稳定在正常范围,空腹血糖也于术后10d恢复至正常值范围以内。切口一期愈合,于术后两周出院。随访27个月移植肾功能正常,胰腺功能正常,未发生血栓、胰瘘、胰腺炎、排斥反应等并发症。结论改良式胰肾联合移植技术简单、安全,胰液经空肠引流更接近消化生理,是治疗糖尿病合并终末期肾病的有效手术方式。     

胰肾联合移植术后并发十二指肠瘘的处理

目的 总结胰肾联合移植术后并发十二指肠瘘的处理经验.方法 回顾性分析1例糖尿病合并尿毒症的患者实施同种异体胰、十二指肠及肾联合移植术(胰液膀胱外引流)的临床资料.该患者胰腺移植于右髂窝,腹主动脉片与髂外动脉做端侧吻合,门静脉与髂外静脉做端侧吻合;肾移植于左侧髂窝,肾静脉、动脉分别与髂外静脉、动脉做端侧吻合,输尿管吻合于膀胱左侧壁.术后应用普乐可复+霉酚酸酯+泼尼松+抗淋巴细胞球蛋白四联免疫抑制方案.结果 患者术后胰肾功能恢复良好,无排斥反应发生,血糖及肌酐水平恢复正常.术后45d突然出现右下腹痛,造影确诊为十二指肠残端瘘,行瘘修补术,术中见瘘口难以修补遂放置一引流管,但术后仍持续漏液,腐蚀周围皮肤.术后7个月突然自腹部皮肤漏胰液处涌出鲜血,血压下降而死亡.结论 十二指肠瘘是胰肾联合移植术后严重的并发症,保障十二指肠有良好的血液供应和可靠的吻合技术是预防其发生的重要因素.     

胰液肠内引流式胰肾同期联合移植(附一例报告)

目的 观察胰肾联合移植治疗胰岛素依赖型糖尿病能功能衰竭的效果。方法 为１例胰岛素依赖型糖尿病合并肾功能衰竭的患者施行胰肾同期联合移植,移植胰的外分泌采用肠内引流。结果 移植胰术后第１ｄ恢复正常功能,移植肾术后第３ｄ恢复正常功能,术后１周停用胰岛素,空腹及餐后血糖正常,未发生急性排斥反应及肠内引流术式的相关并发症。结论 肠内引流式同期胰肾联合移植是治疗糖现合并肾功能衰竭的较好术式。     

肝、胰Ⅰ期联合移植治疗合并糖尿病的良性终末期肝病一例

目的 对1例原位肝、异位胰腺I期联合移植进行总结.方法 对1例终末期肝病合并2型糖尿病的患者施行肝、胰I期联合移植,肝脏为原位移植,胰腺异位移植于右侧髂窝,胰液空肠引流.术后采用他克莫司、霉酚酸酯及糖皮质激素预防排斥反应,并辅以两剂达利珠单抗.结果 术后移植胰腺功能良好,第2天即停用胰岛素.术后14 d,移植肝出现轻度急性排斥反应,调整他克莫司的用量后逆转.受者已存活15个月,移植肝脏及胰腺功能均正常.结论 肝、胰联合移植是治疗终末期肝病合并糖尿病的有效方法.     

肝胰十二指肠联合移植一例报告并文献复习

目的 探讨肝胰十二指肠联合移植治疗终末期肝病合并1型糖尿病的疗效。方法 2003年9月对1例终末期肝病合并胰岛素依赖型糖尿病的患者行同期原位肝、异位胰十二指肠联合移植。结果 术后移植胰腺功能良好,完全脱离胰岛素治疗。术后1周发生移植肝急性排斥反应,经激素冲击治疗后逆转。患者已存活1年9个月,肝脏及胰腺功能均正常,一般情况良好。结论 肝胰十二指肠联合移植是治疗终末期肝病合并糖尿病的有效方法。     

胰腺十二指肠肾脏一期联合移植五例报告

目的 探讨胰腺十二指肠肾脏一期联合移植治疗I型糖尿病伴肾功能衰竭的治疗途径。方法 对我院开展的5例胰、肾一期联合移植病人进行回顾性分析。结果 5例病人中,3例术后胰腺及肾脏功能良好,未使用胰岛素,进正常饮食,血糖一直在正常范围,至今已分别生存20,14,11个月。其余2例病人中,1例术后第47d死于急性心功能衰竭,另1例因血栓形成,于术后33d切除移植的胰腺,但肾功能良好。结论 胰、肾联合移植是治疗I型糖尿病伴肾功能衰竭的有效方法之一,术后通常根据血糖、尿糖、尿淀粉酶、C肽及尿细胞学检查等指标改变,判断移植后胰腺及肾脏的功能情况。     

胰肾联合移植治疗Ⅰ型糖尿病合并终末期肾病

目的 探讨胰肾联合移植治疗Ⅰ型糖尿病合并终末期肾病的临床效果。方法 ８例Ⅰ型糖尿病合并终末期肾病的患者接受胰肾联合移植,平均年龄４３．４６岁,２例合并视网膜病变,双目失明,病史２～２２年。胰腺移植于右髂窝,胰腺外分泌经膀胱引流,肾脏移植于左髂窝。免疫抑制方案开始四联用药,以后三联用药继续治疗。结果 ８例虱其中７例术后即不需要应用胰岛素,空腹血糖可维持在正常范围,１例术后应用胰岛素４０ｄ后停用。１例     

改良的胰液空肠引流式胰、肾一期联合移植(附2例报道)

目的 报告2例改良的胰液空肠引流式胰、十二指肠及肾联合移植的外科技术和治疗胰岛素依赖型糖尿病并发尿毒平的效果。方法 2000年6-9月,2例胰岛素依赖型糖尿病并发尿毒症的患者接受胰、十二指肠及肾一期联合移植,移植胰的外分泌采用空肠内引流,不作Roux-en-Y型吻合,结果 移植后,立即停用胰岛素,肾功能1-5d恢复正常,无外科并发症,未发生排斥反应,患者目前已分别存活5个月和2个月,移植胰和移植肾功能均正常,一般情况良好。结论 改良的胰液空肠引流式胰、十二指肠及肾联合移植技术简单、安全,是治疗I型糖尿病并发尿毒症的较好术式。     

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.     

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.     

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.     

Immunomodulation in Transplantation with Photopheresis

Abstract: Photopheresis is a technique in which peripheral blood mononuclear cells, in the presence of a photoacti-vatable compound, are exposed extracorporeally to ultraviolet A light and reinfused, inducing a host autoregula-tory immune response. Experimental work and ongoing clinical studies are helping to define the role of this novel, safe, and non-toxic immunomodulating technology in the field of transplantation.