胸大肌包裹假体置入一期乳房重建在保留皮肤的乳癌根治术中的应用

目的：探讨保留皮肤的乳腺癌改良根治术一期胸大肌包裹假体置入乳房重建的可行性。方法：对28例0、I、II期乳腺癌患者行保留皮肤的乳腺癌改良根治术后,同期于胸大肌后方置入硅胶假体重建乳房,并根据冰冻切片检查结果决定是否保留乳头乳晕复合体。结果：28例早期乳腺癌患者均保留了乳头乳晕复合体,术后随访2～18个月,外观良好,双侧乳房对称,优良率达96.5%。所有病例均无局部复发或远处转移,无明显术后并发症。结论：保留皮肤的乳腺癌改良根治术后用硅胶假体行一期乳房重建,能达到满意的乳房美容效果,是治疗早期乳腺癌安全可行的方法。     

保留乳头乳晕复合体乳腺癌根治即刻胸大肌包裹假体植入乳房重建

目的 探讨保留乳头乳晕复合体(NAC)的乳腺癌改良根治术即刻胸大肌包裹假体植入乳房重建的可行性.方法 对28例0、I、II期乳腺癌行保留皮肤的乳腺癌改良根治术后,即刻于胸大肌后方植入硅胶假体重建乳房,并根据冰冻切片结果决定是否保留NAC.结果 28例早期乳腺癌均保留了NAC,术后随访2～18个月(中位随访期:15个月),外观良好,双侧乳房对称,优良率达96.5%;均无局部复发或远处转移,无明显术后并发症.结论 保留NAC的乳腺癌改良根治术后用硅胶假体行即刻乳房重建,能达到满意的乳房美容效果,是治疗早期乳腺癌安全可行的方法.     

乳腺癌全乳切除术后I/II期假体植入重建乳房

【摘要】　目的　总结乳腺癌全乳切除术后I/II期硅胶假体植入重建乳房的临床经验。方法 对2005年6月~2012年12月本院收治的87例行全乳切除术后I/II期硅胶假体植入乳房重建的乳腺癌病例进行回顾性分析。结果 87例假体植入手术均取得成功,I/II期植入后客观评价:Ⅰ期优、良及尚好为95.2%,主观评价优、良及尚好为93.6%;Ⅱ期的主客观评价均为100%。I期植入中出现2例乳头乳晕坏死,需行假体取出术,1例乳头坏死,疤痕愈合;随访2~92个月,所有病例均没有发现有局部的复发及远处转移,也未发现假体的移位、包膜挛缩。结论　乳腺癌全乳切除术后Ⅰ/Ⅱ期假体植入重建乳房,能满足乳房切除术后的美容要求,是治疗早期乳腺癌安全可行的方法。     

乳腺癌术后即刻假体植入乳房重建

目的探讨保留皮肤的乳腺癌改良根治术后即刻乳房重建的手术技巧及术后并发症的防治处理方法。方法26例乳腺癌女姓患者实施了改良根治术＋即刻假体植入乳房重建术,术后跟踪按摩并进行必要的辅助治疗。结果术后患者的乳腺癌得到根治,同时乳房达到形体美容的功效,大大减少了患者的心理障碍,提高了患者术后的生活质量。结论乳腺癌术后即刻假体植入乳房再造术易被广大医生及患者所接受。     

几种乳房再造术的临床应用体会

目的：探讨乳腺癌根治术后应用单纯假体植入、可扩张假体植入和带蒂腹部横形腹直肌肌皮瓣（TRAM）移植乳房再造的适应证、手术方法、手术效果。方法：本组共24例病例。14例乳腺癌患者行保留皮肤的乳腺癌根治术，Ⅰ期行假体植入乳房再造；6例采用改良乳腺癌根治可扩张假体植入Ⅰ期乳房再造；4例接受单蒂下腹部横形腹直肌肌皮瓣（TRAM）移植乳房再造手术，其中2例为Ⅰ期再造，另2例为Ⅱ期乳房再造。结果：手术效果较满意，2例出现轻微并发症，其中1例皮瓣局灶坏死，另1例出现乳头乳晕部分坏死。结论：单纯假体植入适用于乳房小，没有明显下垂的瘦小病人。优点是不增加额外瘢痕，术后恢复快；可扩张假体植入乳房再造适用于乳房大或改良乳腺癌根治术的患者，此法结合了单纯假体植入法和组织扩张的优点：TRAM皮瓣移植乳房再造的优点是自体组织移植，安全、手术效果好。     

保留乳头乳晕乳腺全切除术并Ⅰ期乳房重建126例

目的探讨保留乳头乳晕的乳腺全切除术（NSM）及Ⅰ期乳房重建的适应证、方法、效果及可行性。方法对深圳市第二人民医院2005年6月至2011年10月收治的126例乳腺癌患者行保留乳头乳晕的乳腺全切术及Ⅰ期假体植入的乳房重建术,术后从客观和主观两方面评价美容效果,观察其并发症及随访治疗效果。结果126例患者均手术成功。6例早期出现轻微并发症,予以对症治疗后痊愈。术后随访6-80个月,主、客观评价的优良率均为97．62％。其中118例乳腺癌患者无局部复发和远处转移。结论保留乳头乳晕的乳腺全切术及Ⅰ期乳房重建术的手术操作简单易行,美容效果好,无严重并发症,且不影响乳腺癌的综合治疗。     

保留乳头乳晕乳腺全切除术后Ⅰ期假体植入10例报告

目的探讨保留乳头乳晕的乳腺全切除术后Ⅰ期乳房重建的适应证、方法、效果及可行性。方法东南大学附属中大医院2009年1月到2010年10月对10例病人行保留乳头乳晕的乳腺全切术及Ⅰ期假体植入的乳房重建术,术后从客观和主观两个角度评价美容效果,观察其并发症及随访治疗效果。结果所有病人手术成功。术后早期,2例出现轻微并发症,予以对症治疗后痊愈。术后随访6～18个月,主、客观评价的优良率均为100%。其中7例乳腺癌病人局部无复发,远处无转移。结论保留乳头乳晕的乳腺全切术后Ⅰ期乳房重建术的手术操作简单易行,美容效果好,无严重并发症,且不影响乳腺疾病的治疗。     

胸大肌筋膜在乳腺癌乳房切除后即刻乳房重建中的应用

目的:探讨胸大肌筋膜在乳腺癌乳房切除后即刻乳房重建中的应用价值。方法:回顾分析2014年5月—2016年9月接受保留乳头乳晕复合体的皮下腺体切除与即刻乳房重建的18例早期乳腺癌患者临床资料。患者均采用胸大肌及其筋膜覆盖并包裹假体行乳房重建,即首先从自胸骨旁及锁骨下向外侧游离剥离胸大肌筋膜,然后在胸大小肌之间植入假体,最后用游离的胸大肌筋膜缝合胸大肌外侧缘,牢固包裹假体。结果:18例乳房重建手术均取得成功,经过12~40个月随访,所有患者未发现复发、转移,重建乳房对称性好、形态自然,未发现假体移位、挛缩,术后外观评价优良率100%。结论:对于部分早期乳腺癌患者,实施保留乳头乳晕复合体的皮下腺体切除、利用胸大肌及其筋膜覆盖假体的即刻乳房重建方法简单易行,重建乳房美容效果好,并发症少。     

保留皮肤的乳腺癌改良根治术后一期乳房假体再造

目的探讨用硅胶假体植入法修复乳腺癌改良根治术后乳房缺失的疗效。方法2005年6月至11月,10例患者行保留皮肤的乳腺癌改良根治术后,同期于胸大肌后植入硅胶假体再造乳房,并根据冰冻结果决定是否保留乳头乳晕复合体。结果本组病人术后无伤口积液感染,皮肤坏死及异物反应等。10例患者美观效果均满意,其中有4例保留乳头乳晕复合体。所有病人进行术后随访。随访时间为1～6个月。未发现有远处转移和局部复发。无上肢水肿及功能障碍。结论保留皮肤的乳腺癌改良根治术后用硅胶假体行一期乳房再造,具有创伤小、安全、简单、恢复快的特点;再造后乳房美观,效果满意。     

乳房即刻重建术中胸肌筋膜组织瓣覆盖假体的应用分析

目的探讨乳腺癌乳房切除后即刻假体乳房重建术中采用胸肌筋膜覆盖假体的可行性及安全性。方法采用胸肌筋膜覆盖假体的方法行即刻乳房重建术的早期乳腺癌病人27例,对病人术后近期和远期并发症、术后外观满意度、局部复发率、远处转移率及死亡率等进行评估。结果术后随访3～28个月,中位随访13个月。1例病人出现乳头部分缺血坏死,经换药后愈合,其他病人切口均Ⅰ/甲愈合,术后未出现出血、感染等近期并发症。重建乳房无假体外露、假体移位及包膜挛缩等远期并发症,术后外观评价优良率100%(优21例,良6例)。随访期间所有病人无局部复发、远处转移及死亡。结论对早期乳腺癌病人行乳房切除术后采用胸肌筋膜覆盖假体进行即刻乳房重建术,是一种安全、可行的乳房即刻重建方法。     

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.     

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.