一期前路病灶清除植骨内固定治疗脊柱结核

目的探讨经前路病灶清除植骨一期前路内固定术治疗脊柱结核的临床效果。方法对43例脊柱结核患者,行前路病灶彻底清除、椎间植骨、一期前路内固定术。结果脊柱结核复发2例（4.7%）,植骨不融合3例（7.0%）。植骨融合时间3～8个月。脊柱后凸畸形平均矫正70.2%±11.4%。11例截瘫患者神经功能Frankel分级术后恢复情况：术前A级3例术后恢复至B级1例、2例无恢复;B级5例恢复至C级1例、D级2例、E级1例、1例无恢复;C级3例恢复至D级1例、E级2例。结论经前路病灶清除植骨一期前路内固定术治疗脊柱结核能彻底清除结核病灶,充分减压,矫正脊柱后凸畸形,提高脊柱结核的治愈率。     

一期前路病灶清除植骨融合内固定治疗多椎体脊柱结核

目的:总结一期前路病灶清除、自体骨植骨融合及前路内固定治疗多椎体脊柱结核的临床效果。方法:1998年5月～2008年5月收治多椎体脊柱结核(≥3个椎体,包括跳跃性病灶)患者41例,病灶分布为C4～S1,颈椎2例,胸椎14例,胸腰段19例,腰椎4例,腰骶椎2例。伴截瘫者7例,Frankel分级C级4例,B级2例,A级1例。伴后凸成角21例。均采用一期前路病灶清除、自体骨植骨融合及内固定术治疗,随访观察治疗效果。结果:随访12个月～10年,平均67个月。7例截瘫患者术后1年神经功能较术前均有恢复。后凸畸形术前平均Cobb角23.5°,术后平均11.5°,末次随访时平均丢失3.8°。内固定松动1例,伤口及植骨延迟愈合2例。所有患者均骨性融合,结核无复发。结论:多椎体脊柱结核患者采用一期前路病灶清除、自体骨植骨融合、前路内固定治疗可取得良好效果。     

一期前路病灶清除植骨内固定治疗胸腰椎结核临床观察

[目的] 探讨经前路病灶清除植骨一期前路/后路内固定术治疗胸腰椎结核的临床疗效.[方法] 对24例胸腰椎结核患者,经3～4周正规抗结核治疗,行前路病灶清除、椎间大块自体髂骨/肋骨植骨、一期前路/后路内固定术,术后继续抗结核治疗18～24个月.[结果] 1例脊柱结核复发(3%).23例植骨融合,植骨融合率为96.9%,植骨愈合时间 4～8个月(平均6个月).无窦道形成.脊柱后凸畸形平均矫正80%.[结论] 经前路病灶清除植骨一期前路/后路内固定术治疗胸腰椎结核能彻底清除结核病灶,对脊髓及神经根进行彻底减压,促进脊髓及神经功能恢复,矫正脊柱后凸畸形,同时一期建立和恢复脊柱的连续性和稳定性,促进脊柱植骨融合,提高脊柱结核的治愈率.     

一期前路病灶清除联合自体肋骨植骨融合内固定治疗胸椎结核

目的：分析一期前路病灶清除、自体肋骨椎间植骨融合前路内固定术治疗胸椎结核的临床效果。方法2003年6月～2008年5月手术治疗胸椎脊柱结核42例,男25例,女17例,均采用一期前路病灶清除、自体肋骨椎间植骨融合前路内固定术。根据术前、术后随访的X线片,分析植骨融合及脊柱后凸畸形矫正效果;采用Frankel分级、红细胞沉降率（ erythrocyte sedimentation rate, ESR）、C反应蛋白（ C-reactionprotein, CRP ）及视觉模拟量表（ visual analog scale, VAS）评分评估临床治疗效果。结果随访1～7年,平均50．8个月,42例患者均获骨性愈合,愈合时间3～7个月,平均4．5个月,无内固定松动、脱出及断裂;术前Cobb角平均19．8°,术后1周为3．7°,末次随访时为4．6°;Frankel分级,术前B级为3例,C级9例,D级20例,E级10例,末次随访时为D级6例,E级36例;VAS评分术前平均为8．2,术后1周为1．8,末次随访时为1．2。除2例患者术后出现疼痛,持续2个月后自行缓解外,无其他并发症。无复发结核感染出现。结论一期行前路病灶清除、自体肋骨椎间融合前路内固定术治疗胸椎结核,可有效矫正脊柱后凸畸形,重建脊柱稳定性,获得较好的临床效果。     

前路病灶清除植骨内固定治疗胸腰椎结核

目的探讨胸腰椎结核前路病灶清除植骨内固定手术治疗的效果。方法本组104例采用前路病灶清除植骨内固定治疗脊柱结核,病变位于胸椎30例、胸腰椎24例、腰椎50例,术前有后凸成角畸形38°±19°。手术前后配合正规化疗,根据X线片观察脊柱融合时间,手术前后后凸角度变化以及按照Frankel分级的神经功能变化。结果全部病例伤口均一期愈合,未出现严重并发症。随访时间10～48个月,植骨界面骨性融合时间平均5个月。后凸平均矫正度数为18°±5°,22例术前伴有神经损害症状者Frankel分级平均提高2级。结论脊柱前路一期病灶清除植骨内固定治疗胸腰椎结核具有能矫正后凸成角畸形、预防畸形复发、术后患者能早期离床活动等优点,治疗效果满意。     

一期病灶清除植骨内固定术治疗脊柱结核

目的讨论手术治疗脊柱结核的有效性和安全性,探讨病变椎体部分切除、植骨融合、内固定治疗脊柱结核的临床效果。方法回顾性分析35例脊柱结核患者,在2003年1月-2008年1月采用前路病变椎体部分切除、植骨融合、前路或后路内固定手术治疗,其中颈椎结核2例,胸椎结核18例,腰椎结核15例,前路固定26例,后路固定9例。所有病例随访12～24个月,平均18个月。结果所有患者术后切口均一期愈合,早期无局部窦道形成。2例术后3个月结核窦道形成行二次翻修外,余患者结核症状均消失,病灶全部愈合,无复发。椎体间植骨5个月融合,12例术前有神经损伤症状者Frankel分级平均提高1.5级,15例后凸畸形术后平均矫正23°。结论一期病灶清除、植骨融合、前路(后路)内固定治疗脊柱结核可重建脊柱稳定性、缩短卧床时间,纠正和预防后凸畸形,是治疗脊柱结核的理想方法。     

一期前路病灶清除植骨融合内固定治疗胸腰椎结核

目的总结一期前路病灶清除植骨融合内固定治疗胸腰椎结核的经验。方法采用一期前路病灶清除、自体植骨、前路内固定治疗胸腰椎结核19例。结果平均随访15个月,脊髓神经功能得到不同程度地恢复,术后平均5.2个月达满意植骨融合,无内固定失败和脊柱结核病灶复发,后凸畸形矫正满意,Cobb角平均23.4°,平均矫正21.3°。结论一期前路病灶清除植骨融合内固定术可使病变节段在术后即刻重建稳定性,为脊柱融合和结核病灶的静止提供良好的力学环境,是外科治疗脊柱结核安全、有效的方法。     

一期前路病灶清除植骨内固定治疗胸腰椎结核

目的:总结一期前路病灶清除、自体骨椎间植骨融合、前路或后路内固定治疗胸腰椎结核的临床效果。方法:2002年2月～2006年2月手术治疗胸、腰椎结核86例,均采用一期前路病灶清除、自体骨椎间植骨,侧前方内固定52例,后路内固定34例。根据术前、术后X线平片分析植骨融合及脊柱后凸畸形矫正效果。结果:随访8个月～4年,平均23个月。除1例术后2周出现切口皮下血肿、4例1年后仍存在髂骨供骨区疼痛外,无其他并发症;无复发。均获骨性愈合,愈合时间3～7个月,平均4.5个月,无内固定松动、脱出及断裂;术前Cobb角平均为33.6°,术后1周及末次随访时Cobb角分别为平均15.6°、18.6°。结论:对胸、腰椎结核患者行一期前路病灶清除、自体骨椎间植骨融合、前路或后路内固定治疗可有效矫正脊柱后凸畸形,重建脊柱稳定性,获得良好的骨性融合,临床效果良好。     

前路病灶清除植骨融合联合后路椎弓根钉内固定对脊柱结核患者神经功能的影响

目的探讨前路病灶清除术联合植骨融合及后路椎弓根内固定术治疗脊柱结核对患者神经功能的影响。方法选取我院手术治疗的33例胸腰椎脊柱结核患者(2010-01-2016-03)进行回顾性研究,所有患者均采用前路病灶清除术联合植骨融合及后路椎弓根内固定术治疗,对比手术前后不同时间患者的血沉、Frankel神经功能、后凸畸形矫正情况。结果术后1个月、术后3个月,本组患者的ESR、血清CRP水平较术前均显著的降低,差异均具有统计学意义(P0.05);术前,患者脊髓神经功能B级(9.09%)、C级(33.335)、D级(33.33%)、E级(24.24%),术后患者脊髓神经功能C级(6.06%)、D级(36.36%)、E级(63.64%),术后患者的神经功能显著的改善(P0.05);其中17例胸椎结核患者术前均存在不同程度的后凸畸形,角度范围7～30°,平均(14.2±6.0)°,术后患者后凸畸形角度范围2～14°,平均(6.1±3.4)°;术后患者的后凸畸形角度较术前显著的降低(t=6.747,P0.05);33例患者手术后6个月复查,均达到融合标准,患者切口愈合良好,未出现内固定松动等并发症;27例患者术后1年到本院进行复查,神经功能恢复较好,未出复发患者。结论前路病灶清除术联合植骨融合及后路椎弓根内固定术治疗脊柱结核效果肯定,术后患者脊髓神经功能恢复较好。     

一期前路手术内固定治疗脊柱结核

目的:总结一期前路病灶清除、椎体间植骨及前路内固定治疗脊柱结核的临床疗效,探讨一期重建脊柱稳定性的必要性和安全性。方法:自2000年5月至2003年1月共收治21例脊柱结核患者,采用一期前路病灶清除、椎体间植骨及前路内固定治疗,其中颈椎2例、胸椎6例、胸腰段5例、腰椎8例。平均受累椎体数为2.6个。结果:经平均17个月随访,所有患者均临床痊愈,无伤口感染或窦道形成,植骨均完全融合,融合时间平均为3.6个月。术前后凸畸形角度为41.1°±15.6°,术后为13.5°±8.3°,平均17个月随访时为15.9°±6.7°。后凸畸形矫正角度平均为27.6°±9.2°,后期矫正度丢失为2.4°±3.3°。结论:一期前路手术内固定治疗脊柱结核能有效清除病灶、矫正后凸畸形、早期重建脊柱的稳定性及促进椎体间植骨的融合,是一种安全有效的治疗方法。     

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.     

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.     

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.