硬膜外麻醉对老年人气管插管时心血管反应抑制作用的临床观察

观察胸部硬膜外麻醉对老年人全麻气管内插管时心血管反应的抑制作用。方法：利用胸部硬膜外麻醉对４０例老年择期全麻手术病人进行分组对比研究,观察全麻气管内插管时血流动力学,心肌耗氧及应激性激素的变化。结果：实验组气管内插管时血流动力学和心肌耗氧指标及ＲＮ、ＡⅡ显著低于对照组并在围插管斯保持平稳。纣胸部硬膜外麻醉可抑制老年手术患者全麻气管内插管时血浆儿茶酚胺分泌,保持插管期间血流动力学的稳定。     

Monitoring normal and aberrant electrocardiographic activity from an endotracheal tube: Comparison of the surface,esophageal, and tracheal electrocardiograms

Introduction. We designed an endotracheal (ET) tube with orthogonally spaced ECG cuff electrodes. This ET tube was evaluated in dogs and sheep to determine (1) whether ECGs recorded from our tube were sufficient to make accurate clinical decisions concerning heart rate and rhythm; and (2) whether metallic cuff electrodes in direct contact with the trachea could induce mucosal burn injury during episodes of defibrillation.Methods. Using experimental animals, we obtained ECGs from their tracheae and compared our findings with ECGs obtained from surface and esophageal electrodes. The electrical activity of the heart was modified by increasing the depth of anesthesia, occluding the left coronary artery, and administering beta-adrenergic drugs. Before the dogs were euthanized, they were subjected to episodes of transthoracic and intrathoracic defibrillation at energy levels of 200 to 400 J. A postmortem pathological examination of the trachea was performed to determine the incidence of mucosal burn injury.Results. Tracheal electrocardiography provided valid information on heart-rate monitoring and certain morphology profiles. The R-R, PR, QRS, and QT intervals measured from the trachea had a correlation of 1.0, 0.96, 0.83, and 0.98, respectively, when compared with the same intervals obtained from surface electrodes. Two tracheae subjected to intrathoracic defibrillation at >300 J revealed evidence of minor burn injury. Some localized epithelium loss was displayed in all tracheae; we attributed this to tracheal intubation.Conclusion. Tracheal electrocardiography may be useful in trauma patients who require intubation where injury precludes placement of chest ECG electrodes.     

Awake intubation of the adult trachea using the Bullard laryngo-scope

Awake intubation using the Bullard laryngoscope can be comfortably and easily performed in the adult. Five cases are presented in which tracheal intubation was performed under topical anaesthesia with light intravenous sedation. In each case, topical anaesthesia was performed by insertion of a Guedel oral airway, with lidocaine ointment applied to the inferior and posterior surfaces. In one case, Bullard intubation was successful where direct laryngoscopy and multiple attempts at bronchoscopic intubation by three different operators had failed. We conclude that the Bullard laryngoscope can be easily used in awake patients and may be a useful alternative where other methods for awake intubation have failed.     

艾司洛尔预防气管内插管心血管反应的临床观察

研究艾司洛尔静注预防气管插管时心血管反应的效果。将９０例ＡＳＡⅠ～Ⅱ级择期全麻下手术患者随机分为３组,Ａ组（ｎ＝３０）静注艾司洛尔１ｍｇ．ｋｇ－１,Ｂ组（ｎ＝３０）静注艾司洛尔２ｍｇ．ｋｇ－１,Ｃ组（ｎ＝３０）为对照组,静注同等容量的生理盐水。观察注药前、插管前及插管后１ｍｉｎ、２ｍｉｎ、３ｍｉｎ、５ｍｉｎ、１０ｍｉｎ时,心率、收缩压和舒张压的变化。结果显示：Ａ组和Ｂ组均能较好地缓解窥喉和气管插管时心率增快和血压升高的心血管反应,效果尤以Ｂ组为佳;３组中各有１例发生心动过缓和低血压,未见哮喘和过敏。研究提示：艾司洛尔能安全有效地减轻插管时的心血管反应。     

Anesthetic management of a patient with Hallermann-Streiff syndrome

Key words  airway management - difficult intubation - Hallermann-Streiff syndrome     

高血压病史对体外循环冠脉搭桥术后早期预后的影响

目的 :了解高血压病史对体外循环下冠脉搭桥术后早期预后的影响。方法 :对高血压和非高血压行体外循环下冠脉搭桥术年龄大于60岁的冠心病患者65例术前和术后早期的临床资料进行分析。结果 :与非高血压患者相比 ,患高血压的病人冠脉搭桥术后心律失常的发生率增高 ,术后30min动脉氧分压与吸入氧浓度 (PaO2/FiO2)比值明显低下 ,机械通气时间明显延长 ,术后24h内胸腔引流量明显增加 ,术后大剂量多巴胺 (>10μg·kg-1·min -1)应用率及重症监护时间无显著性差异。结论 :高血压病史使患者冠脉搭桥术后早期肺功能下降、心律失常发生率增高、出血倾向增加 ,提示维持高血压患者围手术期血压的正常有利于改善患者预后     

食管异物摘取术的麻醉选择

为探讨食管异物摘取术的麻醉方法，提高手术效果，对７２例食管异物患者采用强化表面麻醉法和气管内插管麻醉法进行了手术和对比观察。７２例异物均取出顺利，无严重并发症发生。资料显示：两种麻醉各具优越性，前者适用于年龄较大的儿童和成人，后者适用于食管异物并呼吸困难的小儿。     

艾司洛尔对气管插管期间脑电双频指数的影响

目的　探讨艾司洛尔对气管插管期间血流动力学和脑电双频指数(BIS)的影响。方法　30例行腹腔镜胆囊切除术的患者,随机分为2组:艾司洛尔组(试验组)和生理盐水组(对照组)。全麻诱导: 2组均靶控输注异丙酚,血浆浓度为4μg·mL-1, 维库溴铵0. 1mg·kg-1。试验组在异丙酚输注5min后,予艾司洛尔1mg·kg-1, 并以150μg·(kg·min)-1维持;对照组予生理盐水。异丙酚输注10min后,行气管插管。观察诱导前、插管前及插管后1, 3, 5min平均动脉压(MAP)、心率(HR)及BIS的变化。结果　插管后1, 3min,对照组MAP、HR显著高于诱导前,试验组与诱导前比较差异无显著性。插管后1, 3min,对照组BIS较插管前显著升高,试验组BIS与插管前比较差异无显著性。结论　气管插管时,艾司洛尔即可减轻病人的心血管反应,又可抑制插管刺激引起的大脑皮层兴奋性的增加。     

Comparison of a new video-optical intubation stylet versus the conventional malleable stylet in simulated difficult tracheal intubation

Handling and efficacy of a new video-optical intubation stylet were assessed in a simulated difficult tracheal intubation setting and compared with a conventional malleable stylet. Forty-five anaesthetists performed 10 tracheal intubations using both techniques. Laryngoscopy was performed by the observer, who created a grade 3 view according the classification by Cormack and Lehane. The time taken to place the tracheal tube and the final tracheal tube positions were documented. Mean (SD) intubation time for the video-optical stylet was 20.4 (7.7) s and for the malleable stylet 10.2 (3.3) s (p<0.01). With the video-optical stylet the trachea was correctly intubated in all 225 attempts; with the malleable stylet 44 (19.6%) oesophageal and 44 (19.6%) endobronchial intubations occurred (p<0.01). The video-optical intubation stylet enabled us to recognise inappropriate tracheal tube positions and to correct them immediately. This equipment can be considered a reliable and effective tool for management of the difficult airway.     

A literature review of the prehospital use of neuromuscular blocking agents by air medical personnel to facilitate endotracheal intubation

Air medical personnel in the United States have used neuromuscular blocking agents to facilitate endotracheal intubation in the field for more than a decade. This literature review examines 15 studies to investigate their experience and explores the following specific areas: the intubation success rate in patients who did or did not receive these agents, the intubation success rate of air medical personnel before and after they incorporated these agents into their practice, the neuromuscular blocking agents and adjunct medications used by air medical personnel, and the disposition of patients who could not be intubated after an agent was given. The data suggest that, overall, air medical personnel use these agents safely and effectively. Suggestions are offered for future studies, including examining ground time when agents are used to facilitate intubation, complications of their use in this setting, and the use of simulators to train personnel in the administration of these medications.