围术期小儿应激反应因素与调控

目的 小儿围术期应激反应的典型表现是神经内分泌系统、免疫系统和代谢系统的变化.术前焦虑、紧张等心理因素以及麻醉、手术创伤均可影响小儿围术期应激反应,而且应激反应的剧烈程度与围术期并发症的发生率密切相关.目的 通过综述比较,确定更能有效降低小儿围术期应激反应的麻醉药物、麻醉方法和术后镇痛方式.内容 综述小儿围术期应激反应...     

麻醉对肿瘤生长和免疫功能的影响

背景 麻醉以及围术期其他因素对肿瘤患者转归的影响已引起广泛关注,由手术引起的应激反应能够破坏患者的免疫系统,增加肿瘤转移的危险,而麻醉是控制应激反应的有效途径. 目的 就不同麻醉方式、药物以及围术期相关因素对恶性肿瘤患者免疫功能及肿瘤转移的影响进行综述.内容 研究表明麻醉方法与药物对肿瘤生长和免疫功能有显著影响. 趋向 对麻醉方法与药物对肿瘤生长和免疫功能的影响做进一步研究.     

颌面部神经阻滞在唇腭裂修复术围手术期的应用进展

背景 唇腭裂在小儿先天性疾病中占很高比列,小儿唇腭裂修复术围手术期的疼痛对喂养和伤口愈合有很大影响. 内容 总结分析颌面部神经阻滞对唇腭裂患儿围手术期镇痛、术后苏醒、颌面部神经阻滞相关并发症以及对术后应用镇痛药物各方面的影响. 目的 通过对小儿唇腭裂修复术围手术期颌面部神经阻滞镇痛方式、应用药物研究现状的总结归纳,探讨颌面部神经阻滞用于唇腭裂修复术围手术期的镇痛效果和副作用,为唇腭裂修复术围手术期镇痛提供有效的依据,完善小儿镇痛. 趋向 颌面部神经阻滞是唇腭裂修复术围手术期较为理想的一种镇痛方式,超声的引进使小儿术后镇痛得到进一步完善.但目前仍缺乏一种绝对满意、安全的颌面部神经阻滞方法,相关内容仍需进一步临床研究.     

小儿喉部疾患围术期麻醉管理

背景 小儿喉部疾患病因复杂,常伴有不同程度的喉梗阻,围术期麻醉管理复杂.目的 通过查阅大量文献,对小儿喉部疾患围术期麻醉管理进行综述.内容 主要从小儿喉部疾患的病因、手术方式、麻醉方法和通气方式进行综述. 趋向 临床上根据不同的病因和手术方式选择不同的通气方式和麻醉方法,保证患儿的安全.     

全麻复合硬膜外阻滞与单纯全麻的比较

比较全麻复合硬膜外阻滞和单纯全麻在围术期对机体应激、炎性、免疫等方面的影响。使用全麻加硬膜外麻醉能有效地抑制手术引起的应激反应，稳定循环状态，减少并发症，使病人在术中更为安全平稳，麻醉效果更为可靠，术毕清醒快，术后镇痛有利于术后病人咳嗽咯痰，并且能减轻围手术期对T细胞亚群的影响。     

吸烟对围术期患者病理生理和麻醉效果的影响

背景 每年都有成千上万的吸烟患者需要手术和麻醉,而大多数麻醉医师未充分认识到吸烟对围术期的危害.目的 为提高麻醉管理水平,改善围术期吸烟手术患者的预后,现将吸烟对围术期患者病理生理和麻醉效果的影响作一综述.内容 吸烟不仅能增加术后并发症(包括肺部并发症、心血管并发症和伤口相关并发症),还能增加麻醉相关并发症(譬如低氧血...     

胸段硬膜外麻醉的非镇痛作用

胸段硬膜外麻醉(thoracic epidural anesthesia,TEA)被广泛用于心脏、胸部和腹部的手术及术后镇痛.然而,许多基础及临床研究都证实TEA除了减轻疼痛,还有更广泛的其他作用.TEA可以降低神经内分泌应激反应,对免疫和凝血系统也有积极的作用,减少围手术期并发症.此外,TEA导致的胸交感神经阻滞被建议用于围术期心、肺、胃肠道的保护.因此这项技术对于很多外科手术的预后有着重要的影响.此文针对TEA非镇痛方面的作用及新近关于TEA应用于重大手术的研究作一综述.     

区域阻滞麻醉与老年患者术后神经系统功能、病死率关系的研究进展

背景 区域阻滞麻醉应用于老年患者手术日益增多,其对老年患者术后神经系统功能、病死率的影响有待总结. 目的 通过文献综述,分析区域阻滞麻醉对老年患者术后神经系统、病死率的影响. 内容 讨论区域阻滞麻醉与老年患者术后神经系统功能,包括术后谵妄、认知功能障碍、脑卒中以及与病死率之间的关系. 趋向 区域阻滞麻醉可以减少老年患者术后肺部并发症,减少术后早期认知功能障碍,与全身麻醉相比,具有一定优势.区域阻滞麻醉是否能降低老年患者术后病死率、心血管并发症发生率、谵妄发生率、围手术期脑卒中发生率尚有待于进一步研究.     

麻醉与眼内压的研究进展

背景围术期眼内压（intraocular pressure，IOP）剧烈波动可以引起严重的眼部并发症，导致视野缺损甚至失明。有研究表明，围术期麻醉、手术操作及药物的使用均可导致IOP发生改变，影响眼内血供。目的系统地阐述围术期生理及麻醉常用药物对IOP影响的研究现状以及进展，为临床工作提供参考，并启发新的研究思路。内容对麻醉期间影响IOP的生理和药物因素进行综述。趋向从近期的研究可见，研究者对围术期生理及药物对IOP的影响机制进行了更为深入的探讨。     

鼻内镜手术患者术后镇痛的研究进展

为了促进患者手术后的快速康复, 镇痛管理是围手术期的关键工作。术后镇痛不当, 会导致术后躁动、切口愈合不良、肺部感染等并发症的发生, 对患者的恢复不利。因此, 根据围手术期关注点, 选择合适的镇痛药物及方式是非常重要的。本文以鼻内镜手术患者术后镇痛为例对术后镇痛进行综述。     

Perioperative thoracic epidural analgesia in aortic surgery: role of levobupivacaine

AIM: Perioperative pain management in patients undergoing surgery is an essential target in order to improve intraoperative outcome and reduce postoperative complications occurrence. The combination of a local anesthetic with an opiate for epidural administration can ensure both analgesic effect (opiate) and neuroendocrine protection (local anesthetic). Levobupivacaine, S(-)-enantiomer form of bupivacaine, produces a sensitive-motor blockade similar to the racemate, with less cardiotoxicity; also ropivacaine is not cardiotoxic, but it has less anesthetic efficacy than levobupivacaine; both anesthetics could be administered through the epidural catheter in order to ensure adequate analgesia without any hemodynamic effects. Aim of our study was to evaluate a thoracic epidural analgesia for abdominal aortic surgery. METHODS: Through a randomized mono-blind study, involving 28 patients undergoing aortic surgery, we performed a clinical evaluation of 2 different perioperative thoracic epidural analgesic techniques; 2 different local anesthetics (levobupivacaine versus ropivacaine) in combination with the same opiate (fentanyl) were compared. RESULTS: The results obtained show that both techniques ensure an excellent perioperative analgesia without any cardiotoxicity, with only moderate adverse effects due to opiate; the absence of postoperative mortality (within 30 days from operation) and the modest perioperative morbidity underline the qualities of this analgesic technique. CONCLUSION: The combination of fentanyl with levobupivacaine or ropivacaine for use in thoracic epidural administration ensured both analgesic and neuroendocrine effect; significative differences between the 2 local anesthetics cannot be demonstrated, even if levobupivacaine, which presents a higher anesthetic efficacy, requires lower dosages.     

Intrathecal and epidural anesthesia and analgesia for cardiac surgery

Adequate postoperative analgesia prevents unnecessary patient discomfort. It may also decrease morbidity, postoperative hospital length of stay and, thus, cost. Achieving optimal pain relief after cardiac surgery is often difficult. Many techniques are available, and all have specific advantages and disadvantages. Intrathecal and epidural techniques clearly produce reliable analgesia in patients undergoing cardiac surgery. Additional potential benefits include stress response attenuation and thoracic cardiac sympathectomy. The quality of analgesia obtained with thoracic epidural anesthetic techniques is sufficient to allow cardiac surgery to be performed in awake patients without general endotracheal anesthesia. However, applying regional anesthetic techniques to patients undergoing cardiac surgery is not without risk. Side effects of local anesthetics (hypotension) and opioids (pruritus, nausea/vomiting, urinary retention, and respiratory depression), when used in this manner, may complicate perioperative management. Increased risk of hematoma formation in this scenario has generated much of lively debate regarding the acceptable risk-benefit ratio of applying regional anesthetic techniques to patients undergoing cardiac surgery.     

Transient abdominal wall deformity in an infant Blaming the caudal?

Locoregional anesthesia is an important aspect of perioperative analgesia. It decreases requirements for anesthetic agents and opioids, decreases the surgical stress response, and provides postoperative analgesia. Nonetheless, pediatric patients, especially infants, demonstrate specificities towards regional anesthesia techniques, as an increased sensitivity to local anesthetics (LA) and a higher ease of LA spread especially when using blocks that rely on the volume of LA and its spread as those used for abdominal wall analgesia or caudal. Thus, we present a case of transient abdominal wall deformity following caudal anesthesia in an infant.     

Effect of postoperative epidural analgesia on surgical outcome

Pain relief allowing sufficient mobilization after major surgical procedures can only be achieved by continuous epidural analgesia with local anesthetics, which also reduces the stress response to surgery. However, the role of postoperative epidural analgesia on postoperative morbidity is controversial. We therefore update the effects of postoperative analgesia on surgical outcome. After major abdominal surgery, postoperative epidural analgesia with local anesthetics significantly reduces postoperative ileus and pulmonary complications while effects on cardiac morbidity are debatable. Continuous epidural analgesia significantly lowers the risk of thromboembolic complications after lower body procedures, while no effect is seen after major abdominal surgery. Unfortunately, many studies have inadequate study design, with use of lumbar epidural analgesia for abdominal procedures, or the epidural regimen does not contain a sufficient amount of local anesthetics. Future evaluation of the effects of epidural analgesia on postoperative outcome also requires integration of epidural analgesia within a multimodal rehabilitation programme.     

Anesthesia for radical prostatectomy

Radical prostatectomy is one of most common treatment options currently recommended for clinically localized prostate cancer. Evaluation of intraoperative and postoperative complications is important in evaluation of relative morbidity of this treatment option. Furthermore, investigation of complications of surgical treatment in correlation with not only surgical technique, but comorbidity, ASA stage and anesthetic technique enables improvements in complete perioperative treatment and decrease of incidence of complications resulting from the procedure. Improvement of anesthetic techniques and use of new anesthetic agents contributes to better outcome of surgical treatment. For radical surgery, combined epidural analgesia and general anesthesia reduces postoperative complications and mortality. Benefits can be conferred most likely by altered coagulation activation in surgery, increased blood flow, reduction of operative stress response. Modalities for reduction of intraoperative blood loss during radical prostatectomy are normovolemic haemodilution, preoperative donation of blood for autologus transfusion and use of erythropoietin for increasing red cell mass.     

A multimodal analgesia protocol for total knee arthroplasty. A randomized, controlled study

BACKGROUND: Although numerous methods of postoperative analgesia have been investigated in an attempt to improve pain control after total knee arthroplasty, parenteral narcotics still play a major role in postoperative pain management. Local anesthetics have the advantage of blocking pain conduction at its origin and minimizing the systemic side effects associated with postoperative narcotic use. This study was performed to evaluate the benefits and safety of a multimodal analgesia protocol that included periarticular injection of large doses of local anesthetics in patients undergoing total knee arthroplasty. METHODS: We compared morphine consumption during the first twenty-four hours after unilateral total knee arthroplasty in forty-two patients who had been randomized to receive either (1) a perioperative infiltration mixture, consisting principally of local anesthetic, and self-administered morphine or (2) self-administered morphine only. Narcotics consumption, pain control, medication-related side effects, plasma levels of the local anesthetic (ropivacaine), and postoperative rehabilitation were monitored. RESULTS: Although there was high satisfaction and good pain control in both groups, morphine consumption was significantly lower in the local analgesia group than it was in the control group (28.8 +/- 17.4 mg compared with 50.3 +/- 25.4 mg twenty-four hours after surgery, and 46.7 +/- 19.4 mg compared with 68.6 +/- 38.6 mg forty hours after surgery). Both groups achieved a similar amount of knee flexion on the fifth postoperative day. Over the five-day period after the procedure, the patients in the local analgesia group reported a total of 2.6 +/- 3.9 hours of nausea compared with 7.1 +/- 12.2 hours in the control group. No complications related to the infiltration of the local anesthetic were observed, and all plasma concentrations of the local anesthetic were below the toxic range. CONCLUSIONS: This multimodal perioperative analgesia protocol that included infiltration of a local anesthetic offered improved pain control and minimal side effects to patients undergoing total knee arthroplasty. Our study also confirmed the safety of the protocol.     

Review article: neuraxial analgesia in neonates and infants: a review of clinical and preclinical strategies for the development of safety and efficacy data

Neuraxial drugs provide robust pain control, have the potential to improve outcomes, and are an important component of the perioperative care of children. Opioids or clonidine improves analgesia when added to perioperative epidural infusions; analgesia is significantly prolonged by the addition of clonidine, ketamine, neostigmine, or tramadol to single-shot caudal injections of local anesthetic; and neonatal intrathecal anesthesia/analgesia is increasing in some centers. However, it is difficult to determine the relative risk-benefit of different techniques and drugs without detailed and sensitive data related to analgesia requirements, side effects, and follow-up. Current data related to benefits and complications in neonates and infants are summarized, but variability in current neuraxial drug use reflects the relative lack of high-quality evidence. Recent preclinical reports of adverse effects of general anesthetics on the developing brain have increased awareness of the potential benefit of neuraxial anesthesia/analgesia to avoid or reduce general anesthetic dose requirements. However, the developing spinal cord is also vulnerable to drug-related toxicity, and although there are well-established preclinical models and criteria for assessing spinal cord toxicity in adult animals, until recently there had been no systematic evaluation during early life. Therefore, in the second half of this review, we present preclinical data evaluating age-dependent changes in the pharmacodynamic response to different spinal analgesics, and recent studies evaluating spinal toxicity in specific developmental models. Finally, we advocate use of neuraxial drugs with the widest demonstrable safety margin and suggest minimum standards for preclinical evaluation before adoption of new analgesics or preparations into routine clinical practice.     

Anästhesie und Analgesie bei Suchtpatienten

Addicts have an exaggerated organic and psychological comorbidity and in cases of major operations or polytrauma they are classified as high-risk patients. Additional perioperative problems are a higher analgetics requirement, craving, physical and/or psychological withdrawal symptoms, hyperalgesia and tolerance. However, the clinical expression depends on the substance abused. For a better understanding of the necessary perioperative measures, it is helpful to classify the substances into central nervous system depressors (e.g. heroin, alcohol, sedatives, hypnotics), stimulants (e.g. cocaine, amphetamines, designer drugs) and other psychotropic substances (e.g. cannabis, hallucinogens, inhalants). The perioperative therapy should not be a therapy for the addiction, as this is senseless. On the contrary, the characteristics of this chronic disease must be accepted. Anesthesia and analgesia must be generously stress protective and sufficiently analgesically effective. Equally important perioperative treatment principles are stabilization of physical dependence by substitution with methadone (for heroin addicts) or benzodiazepines/clonidine (for alcohol, sedatives and hypnotics addiction), avoidance of stress and craving, thorough intraoperative and postoperative stress relief by using regional techniques or systematically higher than normal dosages of anesthetics and opioids, strict avoidance of inadequate dosage of analgetics, postoperative optimization of regional or systemic analgesia by non-opioids and coanalgetics and consideration of the complex physical and psychological characteristics and comorbidities. Even in cases of abstinence (clean) an inadequate dosage must be avoided as this, and not an adequate pain therapy sometimes even with strong opioids, can potentially activate addiction. A protracted abstinence syndrome after withdrawal of opioids can lead to increased response to administered opioids (e.g. analgesia, side-effects).