Search Results
Results 201 - 250 of 1447
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Yang Xiao-Lin - - 2006
BACKGROUND: As in inhaled isoflurane anesthesia, when isoflurane lipid emulsion (ILE; 8%, vol/vol) is intravenously administered, the primary elimination route is through the lungs. This study was designed to determine the minimum alveolar concentration (MAC) and the time course of washout of isoflurane for intravenously infused ILE by monitoring end-tidal ...
Harasawa Rei - - 2006
OBJECTIVES: The purpose of this study was to clarify the clinical efficacy of landiolol, a selective beta(1)-blocker, in patients developing tachycardia during anesthesia. DESIGN: A prospective, randomized, and placebo-controlled study. SETTING: A single university hospital. PARTICIPANTS: Patients undergoing resection of intracranial or maxillofacial tumors under general anesthesia. INTERVENTIONS: Intravenous bolus ...
Masui K - - 2006
BACKGROUND AND OBJECTIVE: Inhalation anaesthetics given only during post-ischaemic reperfusion have some protective effect against reperfusion injury in the heart. Adenosine triphosphate-regulated mitochondrial potassium channels have been shown to be an important mediator of cardioprotection. Thus, we investigated whether 5-hydroxydecanoate, a putative mitochondrial potassium channel blocker, prevents the cardioprotective effect ...
Oliveira Nilton E - - 2006
The anesthetic, ropivacaine, has been used extensively in clinical practice, but few studies have evaluated this long-acting local anesthetic in dentistry. In this study we evaluated the effects of ropivacaine alone and ropivacaine + vasoconstrictor on the cardiovascular system when used as a dental anesthetic in volunteers. Thirty-two healthy subjects ...
Iwade Motoyo - - 2006
OBJECTIVE: The purpose of this study was to compare the effects of dopamine and a new phosphodiesterase (PDE)-3 inhibitor, olprinone, on hemodynamics and myocardial energetics in dogs with acute myocardial depression. DESIGN: Prospective, randomized, crossover study. SETTING: University animal laboratory. SUBJECTS: Mongrel dogs. INTERVENTIONS: Eight open-chest, barbiturate-anesthetized dogs with instruments ...
Umehara Shino - - 2006
Sevoflurane depresses cardio-vagal baroreflex gain (ability of vagally mediated R-R interval response to arterial blood pressure change). We examined the effects of sevoflurane anesthesia on maximum buffering capacity of vagally mediated hemodynamic control (baroreflex range) by examining the entire stimulus-response baroreflex relation. Electrocardiogram and invasive arterial blood pressure were monitored ...
Loepke Andreas W - - 2006
In neonatal rodents, isoflurane has been shown to confer neurological protection during hypoxia-ischemia and to precipitate neurodegeneration after prolonged exposure. Whether neuroprotection or neurotoxicity result from a direct effect of isoflurane on the brain or an indirect effect through hemodynamic or metabolic changes remains unknown. We recorded arterial blood pressure, ...
Lawson A K - - 2006
Isoflurane anesthesia is commonly used in ferrets for routine examinations and diagnostics. Sevoflurane is now being used as well, but there have been no studies to date directly comparing these agents in domestic ferrets. A prospective study was designed to evaluate the quality and speed of anesthetic induction and recovery ...
Durongphongtorn Sumit - - 2006
OBJECTIVE: To compare hemodynamic, clinicopathologic, and gastrointestinal motility effects and recovery characteristics of halothane and isoflurane in horses undergoing arthroscopic surgery. ANIMALS: 8 healthy adult horses. PROCEDURE: Anesthesia was maintained with isoflurane or halothane (crossover study). At 6 intervals during anesthesia and surgery, cardiopulmonary variables and related derived values were ...
Leduc M L - - 2006
BACKGROUND: Although N(2)O has been widely used as an anaesthetic adjuvant its effect on electroencephalographic (EEG) activity is poorly understood because it is usually studied in the presence of additional anaesthetics, including inhaled anaesthetics. We examined the EEG effects of N(2)O in rats using a hyperbaric chamber that permitted N(2)O ...
Boscan Pedro - - 2005
OBJECTIVE: To characterize the effects of ketamine administration on the cardiovascular and respiratory systems and on acid-base balance and to record adverse effects of ketamine in isoflurane-anesthetized dogs. ANIMALS: 6 healthy adult mongrel dogs. PROCEDURE: Dogs were anesthetized with isoflurane (1.25 times the individual minimum alveolar concentration) in oxygen, and ...
Banoczi Walt - - 2005
Various agents are utilized in the operating room to produce anesthetic effects. These include barbiturates, halogenated inhalation agents, narcotics, non-barbiturate induction agents, and benzodiazepines. These agents have variable effects upon the EEG and EP (evoked potential) waveforms at different anesthetic levels. Metabolic changes such as body temperature and blood pressure ...
Mowafi Hany A - - 2005
In this study, I evaluated the efficacy of plethysmographic pulse wave amplitude (PPWA) in detecting intravascular injection of a simulated epidural test dose containing 15 microg of epinephrine in adults during either sevoflurane or isoflurane inhaled anesthesia and compared its reliability to the classical heart rate (HR; positive if > ...
Santos Martín - - 2005
OBJECTIVE: To determine the cardiopulmonary effects of desflurane (DES) in horses. ANIMALS: Six healthy adult horses, three males and three females, aged 9 +/- 4 (mean +/- SD) years and weighing 370 +/- 36 kg. MATERIALS AND METHODS: Anaesthesia was induced with an O2 (10 L minute(-1)) and DES mixture ...
Owczuk Radoslaw - - 2005
BACKGROUND AND OBJECTIVES: Prolongation of the QT interval may result in grave cardiac arrhythmias, polymorphic ventricular tachycardia ("torsades de pointes"), and ventricular fibrillation. We assessed the influence of spinal anesthesia on the QTc interval and the potential arrhythmogenicity of this method of anesthesia. METHODS: Assessment was performed in 20 male ...
Raisis Anthea L - - 2005
This review aims at evaluating studies investigating the effects of anaesthesia on skeletal muscle blood flow and associated cardiovascular function in anaesthetized horses and discusses how the results of these studies contribute to our understanding of the pathogenesis and prevention of post-anaesthetic myopathy. Pubmed & personal files. There is little ...
Dahlgren G - - 2005
BACKGROUND: Hypotension associated with spinal anesthesia for cesarean section is still a clinical problem. Colloid solutions seem preferable to crystalloid solutions for preloading. In most studies the overall rate of hypotension is reported. Few studies have, however, investigated the maternal and neonatal consequences of different levels of maternal hypotension. METHODS: ...
Arain Shahbaz R - - 2005
BACKGROUND: Desflurane and sevoflurane have markedly different pungencies. The tested hypothesis was that patients breathing equivalent concentrations of desflurane or sevoflurane through a laryngeal mask airway (LMA) would have similar responses. METHODS: After institutional review board approval and informed consent were obtained, 60 patients were enrolled and given intravenous midazolam ...
Ewaldsson Carl-Arne - - 2005
BACKGROUND: In sheep, isoflurane causes extravascular accumulation of infused crystalloid fluid. The current study evaluates whether isoflurane has a greater tendency than propofol to cause extravascular retention in surgical patients. METHODS: Thirty patients undergoing thyroid surgery lasting for 143 +/- 32 min (mean +/- SD) received an intravenous infusion of ...
Weber Frank - - 2005
BACKGROUND: The Narcotrend Index (NI) of anesthetic depth is potentially a pharmacodynamic measure of the effects of sevoflurane on the brain. METHODS: In this prospective observational study of 30 pediatric surgical patients (1-11 years), we investigated the correlation between nonsteady-state endtidal sevoflurane (eT(Sevo)), NI, mean arterial pressure (MAP), and heart ...
Nagata Shun-ichi - - 2005
PURPOSE: The purpose of our study was to investigate the frequency of hemodynamic instability in patients undergoing carotid artery stenting (CAS) under general anesthesia using sevoflurane and nitrous oxide in oxygen. METHODS: A total of 97 consecutive CAS procedures were performed in 84 patients under sevoflurane anesthesia. The following hemodynamic ...
Bertelsen Mads F - - 2005
OBJECTIVE: To determine the minimum alveolar concentration (MAC) of sevoflurane and assess the sevoflurane-sparing effect of coadministration of nitrous oxide in mechanically ventilated Dumeril monitors (Varanus dumerili). DESIGN: Prospective crossover study. ANIMALS: 10 healthy adult Dumeril monitors. PROCEDURE: Anesthesia was induced with sevoflurane in 100% oxygen or sevoflurane in 66% ...
Vuckovi? Ilvana - - 2005
In the last few decades there has been a great development of regional anesthesia; all the postulates are defined and all the techniques of usage are perfected. However, like any other medical procedure, the block of brachial plexus carries a risk of certain unwanted complications, like possible intraneural and intravascular ...
Keller C - - 2005
BACKGROUND AND OBJECTIVE: There are no data about the influence of anaesthetics on cardiovascular variables during pressure support ventilation of the lungs through the laryngeal mask airway. We compared propofol, sevoflurane and isoflurane for maintenance of anaesthesia with the ProSeal laryngeal mask airway during pressure support ventilation. METHODS: Sixty healthy ...
Meral Gokce - - 2005
Lidocaine with epinephrine is currently the most common local anesthetic agent used for impacted third molar surgery. The purpose of the present study was to define the adverse hemodynamic effects and plasma concentrations of lidocaine and epinephrine on 17 healthy patients during the impacted teeth operations. Arterial blood pressure (systolic ...
Kreuer Sascha - - 2005
Bispectral Index (BIS) (Aspect Medical Systems, Newton, MA) and Narcotrend (MonitorTechnik, Bad Bramstedt, Germany) are monitoring devices that were, as others, designed to assess the depth of anesthesia. Meanwhile, a number of studies indicate that with total IV anesthesia, BIS and Narcotrend have comparable effects on drug consumption and recovery ...
Owczuk Radoslaw - - 2005
Volatile anesthetics may prolong the QTc interval and this may result in grave cardiac arrhythmias. We assessed the effect of desflurane on the QTc interval in 40 ASA physical status I or II patients. Volatile anesthetic induction with desflurane was performed, and after obtaining adequate level of anesthesia, QTc interval, ...
Jirasiritham Siriwan - - 2005
Half MAC (minimal alveolar concentration) of volatile anesthetics has been commonly used with nitrous oxide for cesarean section which could occur intraoperative awareness. Over half MAC or more than 1% sevoflurane was studied on 65 parturients who came for either elective or emergency operations. The patient characteristics were age 31.00+/-5.67(21-41) ...
Raisis A L - - 2005
BACKGROUND: Experimental studies in adult horses have shown that general anaesthesia maintained with isoflurane is associated with less depression of cardiovascular function compared with halothane anaesthesia. Adverse effects of intermittent positive-pressure ventilation (IPPV) have also been demonstrated. Nevertheless, the haemodynamic effects of these agents and the effects of differing modes ...
Hernandez-Divers Sonia M - - 2005
The anesthetic and cardiopulmonary effects of butorphanol followed by sevoflurane or isoflurane were compared in 23 male green iguanas (Iguana iguana). Heart and respiratory rates were recorded before administration of butorphanol (2 mg/kg i.m.) and at 30 min after premedication. Anesthesia was induced in 12 iguanas (group 1) with isoflurane ...
Toprak Hüseyin I - - 2005
OBJECTIVES: The aim of this study was to investigate the effects of sevoflurane and propofol used in electroconvulsive therapy (ECT) on hemodynamic variables and duration of seizure activity and recovery profiles. METHODS: Sixteen patients who were not premedicated, with a mean age 27.1 years, were enrolled in this prospective open ...
Kandatsu Nobuhisa - - 2005
BACKGROUND: The current study was undertaken to investigate the effects of pretreatment with isoflurane and sevoflurane on the development of neurogenic pulmonary edema in an animal model. METHODS: Rats were exposed to room air (control), 1.5% isoflurane, or 2.5% sevoflurane for 4 h. They were then anesthetized with intraperitoneal injections ...
Baumert J-H - - 2005
BACKGROUND: Circulatory response to hypoventilation is aimed at eliminating carbon dioxide and maintaining oxygen delivery (DO(2)) by increasing cardiac output (CO). The hypothesis that this increase is more pronounced with xenon than with isoflurane anaesthesia was tested in pigs. METHODS: Twenty pigs received anaesthesia with xenon 0.55 MAC/remifentanil 0.5 microg ...
Tanaka Makoto - - 2005
Beat-to-beat assessment of spontaneously occurring fluctuations in heart rate and arterial blood pressure allows noninvasive determination of cardiovagal function, but little is known regarding the effects of general anesthesia on spontaneous baroreflex (SBR) indices. We examined (a) concentration-dependent effects of sevoflurane on SBR indices, heart rate variability (HRV), and blood ...
Kurt Filiz - - 2005
This study compared the efficacy of isoflurane, sevoflurane, and desflurane in achieving hemodynamic stability in spinal procedures using moderate levels of controlled hypotension. After obtaining ethics committee approval and written informed consent, 32 American Surgical Association I-II patients were randomly allocated to receive isoflurane (n=12), sevoflurane (n=10), or desflurane (n=10) ...
Baumert J-H - - 2005
BACKGROUND: It was hypothesized that xenon would stabilize mean arterial pressure (MAP) in haemorrhagic shock, recovery, and volume resuscitation, because a higher MAP has been observed with xenon, when compared with isoflurane anaesthesia. The responses to haemorrhage and subsequent volume replacement were therefore compared between xenon and isoflurane anaesthesia, in ...
Pypendop Bruno H - - 2005
OBJECTIVE:To determine the hemodynamic effects of lidocaine (administered IV to achieve 6 plasma concentrations) in isoflurane-anesthetized cats. ANIMALS: 6 cats. PROCEDURE: Cats were anesthetized with isoflurane in oxygen (end-tidal isoflurane concentration set at 1.25 times the predetermined individual minimum alveolar concentration). Lidocaine was administered IV to each cat to achieve ...
Sivaci Remziye - - 2005
BACKGROUND: This study was designed to investigate the effects of inhaled anesthetic agents on respiratory mechanics with low flow anesthesia in laparoscopic abdominal surgery. Two inhaled anesthetics, desflurane and sevoflurane, have a lower solubility in blood and tissues than all previous volatile anesthetics, and have become the preferred volatile anesthetics ...
Meekins Alan - - 2005
The Universal Portable Anesthesia Complete is supplied with a 12-inch oxygen reservoir. Previous work suggested that using a longer (greater-volume) reservoir results in a greater inspired oxygen concentration. This study assessed the work of breathing imposed by lengths of reservoir tubing (18, 30, and 48 inches) during simulated spontaneous breathing ...
Kushiro Tokiko - - 2005
The anesthetic sparring and cardiovascular effects produced by midazolam 0.8 mg/ml-ketamine 40 mg/ml-medetomidine 0.05 mg/ml (0.025 ml/kg/hr) drug infusion during sevoflurane in oxygen (MKM-OS) anesthesia was determined in healthy horses. The anesthetic sparring effects of MKM-OS were assessed in 6 healthy thoroughbred horses in which the right carotid artery was ...
Steffey Eugene P - - 2005
OBJECTIVE: To quantitate the effects of desflurane and mode of ventilation on cardiovascular and respiratory functions and identify changes in selected clinicopathologic variables and serum fluoride values associated with desflurane anesthesia in horses. ANIMALS: 6 healthy adult horses. PROCEDURE: Horses were anesthetized on 2 occasions: first, to determine the minimum ...
Bertelsen Mads F - - 2005
OBJECTIVE: To determine minimum alveolar concentration (MAC) of isoflurane in mechanically ventilated Dumeril monitors (Varanus dumerili). DESIGN: Prospective study. ANIMALS: 10 healthy adult Dumeril monitors. PROCEDURE: Anesthesia was induced with isoflurane in oxygen delivered through a face mask. Monitors were endotracheally intubated, and end-tidal and inspired isoflurane concentrations were continuously ...
Souza Almir Pereira - - 2005
The cardiopulmonary effects of desflurane and sevoflurane anesthesia were compared in cats breathing spontaneously. Heart (HR) and respiratory (RR) rates; systolic (SAP), diastolic (DAP) and mean arterial (MAP) pressures; partial pressure of end tidal carbon dioxide (PETCO2), arterial blood pH (pH), arterial partial pressure of oxygen (PaO2) and carbon dioxide ...
Fantoni Denise Tabacchi - - 2005
The hemodynamic response to acute normovolemic hemodilution (ANH) can be affected by the anesthetics used. We randomized 18 mongrel dogs to undergo ANH with 3 different inhaled anesthetics: halothane, isoflurane, or sevoflurane. Hemodynamics, oxygen transport, and gastric pH were measured before blood withdrawal, at the end of hemodilution, and 30 ...
Marval Paul D - - 2005
The zero flow pressure (ZFP) is the pressure at which blood flow ceases through a vascular bed. Using transcranial Doppler ultrasonography, we investigated the effects of propofol or sevoflurane on the estimated cerebral perfusion pressure (eCPP) and ZFP in the cerebral circulation. Twenty-three healthy patients undergoing nonneurosurgical procedures under general ...
Tung Avery - - 2005
Advances in anesthesia involve refinements in understanding, technique, and technology. These refinements have led to better control of the anesthetic state, effective anesthesia for a wider variety of situations, and the ability to bring sicker patients to the operating room. Although the molecular mechanisms underlying the general anesthetic state are ...
Nishiyama Tomoki - - 2005
PURPOSE: The purpose of this study was to compare hemodynamic and catecholamine changes due to a sudden increase in inhalation anesthetic concentrations (isoflurane and sevoflurane) during surgery. METHODS: Thirty patients aged 40-70 years scheduled for lower abdominal surgery were anesthetized with either isoflurane or sevoflurane with nitrous oxide and epidural ...
Iijima Takehiko - - 2005
PURPOSE: The standard value for circulating blood volume (BV) during anesthesia was determined by a multicenter study in Japan. The significance of BV on the reduction of blood pressure after the induction of anesthesia was also examined. METHODS: The study included 184 patients from eight university hospitals. After the induction ...
Ohmizo Hiroshi - - 2005
Twenty-three adult patients undergoing repair of inguinal hernia under spinal anesthesia received propofol infusion for sedation with the assist of noninvasive positive-pressure ventilation (NPPV). Circulatory and respiratory parameters, such as percutaneous oxygen saturation, transcutaneous carbon dioxide tension, respiratory rate, tidal volume, blood pressure, and heart rate, were maintained within physiological ...
Takeyama Kazuhide - - 2005
This report describes anesthetic management of a case (a 64-year-old man) who was originally diagnosed as paraesophageal hernia before surgery and later diagnosed as Bochdalek hernia during laparoscopic surgery. Anesthesia was started with oxygen, nitrous oxide, and sevoflurane, and respiration was managed using controlled mechanical ventilation. Although left pneumothorax was ...
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