改良的Madigan前列腺切除术31例报告

目的 :总结改良的Madigan前列腺切除术的手术方法以便更好用于临床。方法 :根据不同BPH患者的特点选用改良的Madigan前列腺切除术 ,近膀胱颈部横切口显露尿道 ,或联合膀胱切开行增生腺体切除术并膀胱结石取出术 ,对3 1例前列腺增生患者行手术治疗。结果 :3 1例手术均顺利完成 ,2 6例完整保留尿道 ,5例尿道或膀胱颈部粘膜损伤均一期修复愈合。术中出血 110～ 60 0ml,平均 15 0ml,均未输血。手术时间 90～ 15 0min ,平均 12 0min。 2 1例随访 2～ 6个月 ,IPSS由术前平均 2 7.1分降至术后 8.3分。结论 :利用改良的Madigan术可提高手术前列腺切除术的治疗效果 ,简化Madi gan术式的技术难点 ,拓宽Madigan术式的手术适应证     

改良的Madigan前列腺切除术

目的　对Madigan前列腺切除术 (MPC术 )进行改良 ,提高手术疗效。　方法　对 52例前列腺增生 (BPH)患者行MPC术 ,并进行手术改良。包括 :(1)显露膀胱颈及尿道起始部以避免或减少尿道损伤 ;(2 )联合膀胱顶部小切口以治疗中叶增生显著和 (或 )合并膀胱病变的BPH。结果　尿道完整或基本完整者 48例 ,术中出血较少 ,平均手术时间 12 0min。其中 3 5例获随访 ,随访时间 1～ 12个月 ,术后平均最大尿流率 18 9ml/s;8例患者手术前后行排尿期膀胱尿道造影 ,证实术后前列腺部尿道及膀胱颈完整 ,尿道较术前明显增宽。　结论　改良的MPC术减少了尿道损伤的发生 ,扩大了MPC术的适应证 ,手术操作简便、并发症少 ,疗效确切     

经尿道汽化电切除术治疗前列腺增生症(附86例报告)

本文回顾性分析经尿道前列腺汽化电切除术 (TUEVP)治疗前列腺增生症 86例 ,其中I°增生 11例 ,II°度增生4 9例 ,III°增生 2 6例。手术时间 35min～ 12 0min ,平均 80 6min ,未发生经尿道前列腺电切综合征。术中、术后输血者各 1例。 6例出现短暂的尿失禁。术后 79例随访 1月～ 1年 ,残余尿由术前 (2 85 1± 2 5 )ml降至 (30 2± 2 1)ml(t=31 112 ,P <0 0 0 1) ;最大尿流率由术前 (5 1± 1 6 )ml s升至 (16 2± 2 2 )ml s(t=5 6 31,P <0 0 0 1)。指出TUEVP术中应注意前列腺尖部及膀胱颈部的处理。     

海拔2260米地区Madigan前列腺切除术尿道破裂不修补135例临床观察

目的回顾性探讨前列腺增生症（benign prostatic hyperplasia，BPH）的Madigan前列腺切除术尿道破裂不修补的治疗效果。方法采用Madigan前列腺切除术，尿道黏膜破裂不予修补。结果尿道保留完整者81例，尿道破裂者54例。尿管保留6—9d，拔除尿管后自主排尿通畅，测定术后剩余尿量、最大尿流率（Qmax）、国际前列腺症状评分（IPSS）、生活质量评分（QOL）等，未修补尿道与保留尿道完整二者比较差异无统计学意义。结论不修补尿道黏膜破裂的Madigan前列腺切除术是适用于未具备TURP设备条件与技术的基层医院治疗BPH较为有效的开放术式。     

经尿道等离子体双极电切术治疗良性前列腺增生及膀胱肿瘤

目的　探讨经尿道等离子体双极电切的安全性与有效性。　方法　用经尿道等离子体双极电切行前列腺切除 (PKRP) 30 0例 ,前列腺 2 1～ 12 6 g ,平均 (49.7± 35 .8) g ;行浅表性膀胱肿瘤切除 (PKRBT) 37例 ,肿瘤分级G12 5例 ,G2 12例。术后随访 1～ 6个月。　结果　PKRP手术时间 13～ 98min ,平均 (48± 31)min ;切除前列腺组织重量 7～ 91g ,平均 (31± 2 9)g。无 1例需输血 ,无电切综合征发生。术后 1、3、6个月 ,最大尿流率 (Qmax)由术前的 (5 .2± 3.9)ml/s分别上升至 (19.2±4 .1)、(2 1.8± 4 .6 )、(2 2 .3± 5 .7)ml/s;国际前列腺症状评分 (IPSS)由术前的 2 4 .7下降至 5 .7、5 .4、5 .1;生活质量评分 (QOL)由术前的 5 .3分别下降至 1.7、1.8、1.2。 3项指标手术前后比较差异均有显著性意义 (P <0 .0 5 )。PKRBT手术时间 5～ 39min ,平均 (2 4± 13)min。 17例侧壁肿瘤切除时 ,5例发生闭孔神经反射 ,其中 1例发生膀胱穿孔。随访 1～ 6个月无复发。　结论　用等离子体双极电切进行PKRP和PKRBT安全有效。     

经尿道前列腺汽化与开放手术对老年前列腺增生患者术后性功能的影响

目的 评价经尿道前列腺汽化(TUVP)和开放性手术对老年前列腺增生(BPH)患者术后性功能的影响。方法 分别统计TUVP组(52例)、耻骨上经膀胱前列腺切除组(SPP组，46例)和耻骨后保留尿道前列腺切除组(Madigala组，32例)术后6个月、12个月勃起障碍与逆行射精的发生率。结果 术后6个月勃起障碍的发生率：TUVP组、SPP组、Madigan组分别为13．4％(7例)、15．2％(7例)、12．5％(4例)，术后12个月分别为11．5％(6例)、15．2％(7例)、12．5％(4例)；术后6个月、12个月逆行射精的发生率，3组分别为46．2％(24例)、39．1％(18例)、9．3％(3例)。结论 TUVP与传统开放性手术SPP及Madigan手术对勃起障碍及性活动的影响不明显，但逆行射精的发生率较Madigan手术组高，提示TUVP对术后射精功能有较大影响。     

经尿道前列腺汽化联合电切治疗良性前列腺增生症(附165例报告)

目的　探讨经尿道前列腺汽化电切除术 (Transurethralelectrovaporizationoftheprostate,TUVP)与经尿道前列腺电切术 (Transurethralresectionoftheprostate,TURP)联合治疗良性前列腺增生症 (Benignprostatichyperplasia ,BPH)的疗效。　方法　1999年 10月～ 2 0 0 1年 9月联合TUVP与TURP治疗BPH 16 5例。　结果　手术时间 ( 2 0～ 145 )min ,平均 6 5min。切除前列腺组织重量 8g～ 10 0g ,平均 34g。随访 112例 ,时间 3月～ 18月。IPSS由术前 ( 2 1 0± 3 0 )分下降至术后 ( 7 8± 1 1)分 (t=2 12 ,P <0 0 5 )。残余尿量由术前 ( 6 5 0± 12 6 )ml下降至术后 ( 18 6± 15 0 )ml(t=2 35 ,P <0 0 5 )。　结论　TUVP联合TURP治疗BPH综合两者优点 ,出血少 ,并发症少 ,疗效显著 ,安全性高。     

经尿道电气化术治疗前列腺增生的远期疗效

目的 :评价经尿道电气化术 (TUVP)治疗良性前列腺增生 (BPH)的远期疗效。方法 :BPH患者 80例 ,根据治疗方法分为TUVP组和经尿道前列腺电切术 (TURP)组 ,比较其国际前列腺症状评分 (IPSS)、生活质量评分 (QOL) ,最大尿流率Qmax、膀胱剩余尿量 (PRV)及远期并发症 (尿道狭窄、尿失禁及再次手术 )的发生率等情况。结果 :TUVP与TURP患者的各项指标术前分别为IPSS(2 9.7± 4 .3)和 (2 8.6± 4 .5 )分、QOL(5 .7± 0 .8)和 (5 .3± 0 .7)分、Qmax(8.4± 3.9)和 (8.2± 4 .2 )ml/s、PRV(2 4 3.0± 5 5 .3)和 (2 4 0 .0± 4 7.2 )ml,均P值 >0 .0 5。术后分别为IPSS(8.1± 1.7)和 (10 .7± 2 .6 )分 ,QOL(1.7± 0 .6 )和 (2 .0± 0 .5 )分 ,Qmax(2 1.6± 4 .3)和 (19.1±4 .3)ml/s、PRV(2 8.7± 10 .4 )和 (38.7± 12 .5 )ml,均P值 >0 .0 5。远期并发症的发生率分别为 5 .2 % (TUVP)和7.1% (TURP) ,P值 >0 .0 5。结论 :TUVP与作为金标准的TURP长期疗效是等同的     

经尿道前列腺电切气化术治疗前列腺增生568例报告

目的 :进一步探讨前列腺增生 (BPH)的有效手术新方法。方法 :采用经尿道前列腺电切术和气化术治疗BPH患者 5 6 8例。结果 :疗效满意 ,术后 3～ 6个月随访 ,国际前列腺症状评分 (IPSS) 8.5± 1.5分 ;最大尿流率 (Q max) 2 0 .5± 4 .5ml s,剩余尿量 2 9.1± 14 .2ml,未出现严重并发症。结论 :将电切和气化相结合行经尿道前列腺切除术是一种安全性高、并发症少、疗效确切的新手术方法 ,具有操作易掌握、出血少、速度快、安全可靠等优点。     

经尿道钬激光前列腺剜除术治疗良性前列腺增生

目的 :评价经尿道钬激光前列腺剜除和前列腺组织粉碎术治疗良性前列腺增生 (BPH)的临床效果。　方法 :应用 10 0W钬激光器和组织粉碎器对 35例BPH病人实施经尿道钬激光剜除和前列腺组织粉碎术治疗。　结果 :本组 35例手术均获成功。手术时间 30～ 180min ,平均 (6 0 .0± 2 3.2 )min。获得前列腺组织 10～ 5 6g ,平均(31± 9) g ,术后留置导尿管时间 2 0h～ 4d ,平均1.5d。无术中术后输血病例。组织病理学诊断均为BPH。 32例获随访 ,术后 3个月随访国际前列腺症状评分 (IPSS)由 (2 4.0± 6 .2 )分降至 (5 .6± 3.6 )分 (P <0 .0 0 1)。最大尿流率 (Qmax)由 (8.5± 3.9)ml/s上升至 (2 2 .0± 7.2 )ml/s(P <0 .0 0 1) ,残余尿由 (138± 12 5 )ml减少到 (2 1± 15 )ml,未发生严重并发症。　结论 :钬激光前列腺剜除术是治疗BPH的有效微创方法 ,术中术后出血少 ,能够完整剜除增生的前列腺组织。留置导尿管时间短 ,临床症状改善明显。     

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.     

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.     

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.