Abstract:
BACKGROUND:Among the various factors influencing the success rate, onset time, and duration of peripheral nerve blocks, the role of local anesthetics concentration remains uncertain. In this prospective, randomized, single-blinded study, we evaluated whether varying the dilution of a fixed dose of mepivacaine solution influenced onset time and duration of sciatic nerve block. METHODS:Ninety ASA physical status I to II patients scheduled for foot surgery were randomly allocated to receive a double-injection Labat sciatic nerve block with 12 mL mepivacaine 2% (group concentration I = 45 patients) or 24 mL of mepivacaine 1% (group volume II = 45 patients). The nerve stimulator was initially set at 2 Hz, 0.1 millisecond, 1 mA. The total amount of local anesthetic (240 mg) was kept constant and equally divided between the peroneal and tibial nerves. All patients also received an ultrasound-guided popliteal sciatic nerve catheter for postoperative analgesia. Times to readiness for surgery, performance, and offset of local anesthetic were recorded. Our primary end point was to determine a possible difference in offset time between groups. Continuous variables were expressed as median (IQR) and compared with the Wilcoxon-Mann-Whitney U test; WMWodds are reported together with their 95% confidence interval. RESULTS:The overall success rate of sciatic nerve block was 99%. Time of performance was shorter in group I, 120 seconds (90-150 seconds), than that in group II, 150 seconds (120-180 seconds) (P = 0.0048; WMWodds 2.26 [1.35-4.34]). The onset time of sensory and motor sciatic nerve block was 4 minutes (2-9 minutes) in group I and 6 minutes (4-10 minutes) in group II (P = 0.41; WMWodds 1.21 [0.77-1.95]), while the duration of sensory block was 235 minutes (203-250 minutes) in group I, and 240 minutes (218-247 minutes) in group II respectively (P = 0.51; WMWodds 1.20 [0.69-2.16]). CONCLUSIONS:We found no evidence that varying volume and concentration while maintaining a fixed total dose of mepivacaine alters the onset time and duration of double-injection sciatic nerve block. Considering our WMWodds results, possible differences in onset time and duration comparable to differences in the performance time between groups cannot be excluded.
journal_name
Anesth Analgjournal_title
Anesthesia and analgesiaauthors
Cappelleri G,Ambrosoli AL,Turconi S,Gemma M,Ricci EB,Cornaggia Gdoi
10.1213/ANE.0000000000000293subject
Has Abstractpub_date
2014-08-01 00:00:00pages
489-93issue
2eissn
0003-2999issn
1526-7598journal_volume
119pub_type
杂志文章,随机对照试验abstract::Roentgenograms of iothalamate meglumine 60% (Conray) injected bilaterally into the intercostal grooves of the ninth or tenth ribs in 30 surgical patients showed extensive spread of the contrast central and peripherally from the site of injection within 30 seconds, with almost complete absorption within 10 minutes 30 s...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1980-11-01 00:00:00
abstract:UNLABELLED:Sevoflurane (SEVO) provides faster emergence than isoflurane (ISO). This advantage is thought to magnify with increased duration of exposure. In addition, SEVO has several of the characteristics of an ideal neuroanesthetic. We designed a prospective, randomized, double-blinded study to compare the recovery p...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00000539-200211000-00052
更新日期:2002-11-01 00:00:00
abstract:UNLABELLED:Linking physiological pharmacokinetic models to models of the cardiovascular system requires knowledge of the sites in the body that mediate a drug's cardiovascular effects. We examined the role of the coronary concentrations of propofol. Nine sheep anesthetized with isoflurane (2%) were instrumented acutely...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000060561.16583.a7
更新日期:2003-06-01 00:00:00
abstract:BACKGROUND:Current methods of information transfer in the operating room between monitor and anesthesiologist rely on visual and auditory modalities. These modalities can easily become overloaded in a high cognitive workload situation, such as in a critical incident. The use of vibrotactile communication has been shown...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,随机对照试验
doi:10.1213/ane.0b013e318163f7c2
更新日期:2008-04-01 00:00:00
abstract::To evaluate the effects of high-frequency jet ventilation (HFJV) (f = 60, 120 breaths/min) and conventional mechanical ventilation (CMV) (f = 10, 20) during equivalent conditions of cardiac tamponade, stroke index (SI), intrapericardial pressure (IPP), airway pressure (P(aw)), and cardiac pressures were measured in an...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/00000539-199004000-00006
更新日期:1990-04-01 00:00:00
abstract::Dantrolene effectively treats malignant hyperthermia (MH) hut the current form, Dantrium, must be dissolved to a 0.33 mg/mL, pH 9.5 solution. This study describes lecithin-coated microcrystal formulations of sodium dantrolene (MC-NaD) and neutral dantrolene (MC-D) which reconstitute to 200 mg/mL within 1 min. In rats,...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-199604000-00021
更新日期:1996-04-01 00:00:00
abstract::Blind oral intubation using the Augustine Guide is helpful for intubating the trachea of patients presenting with difficult airways. This device has been modified by adding a fiberoptic scope with a built-in battery-powered light. We studied this Augustine Scope in 104 patients (Group AS) and compared the results with...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章
doi:10.1097/00000539-199703000-00026
更新日期:1997-03-01 00:00:00
abstract:BACKGROUND:Xenon has many characteristics that make it very attractive as an anesthetic and therapeutic drug. Unfortunately, the supply of xenon is fixed, and therefore reclamation and recovery from even the most efficient breathing circuits is desirable. We built and evaluated a cryogenic device to recover xenon from ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000278148.56305.72
更新日期:2007-11-01 00:00:00
abstract::The effects of commercial and crystalline solutions of chloroprocaine (CP) (1.6 X 10(-3)-0.4 X 10(-3)M) and sodium bisulfite (SB) (0.8 X 10(-3)-0.08 X 10(-3)M) were studied on the multiplication of human neuroblastoma cells. These cells were chosen because of putative neurotoxicity associated with CP; cell multiplicat...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1987-10-01 00:00:00
abstract::The direct effect of protamine sulfate upon myocardial inotropism was studied using an isolated canine heart muscle preparation. Isometric force (F) was decreased to 87.6 +/- 1.2% of control values by a concentration of 50 x 10(-3) g/L protamine, which is approximately equal to the estimated serum concentration of pro...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1980-02-01 00:00:00
abstract::The protective effect of a nonionic surface-active polyol agent (Pluronic F-68) against bolus injection and constant-rate IV infusion of air was studied in 21 dogs anesthetized with pentobarbital. Aortic, pulmonary artery and right ventricular pressures, cardiac output, end-tidal CO2 concentration, wasted ventilation,...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/00000539-197511000-00030
更新日期:1975-11-01 00:00:00
abstract::Phenylephrine and methoxamine are direct-acting, predominantly α(1) adrenergic receptor (AR) agonists. To better understand their physiologic effects, we screened 463 articles on the basis of PubMed searches of "methoxamine" and "phenylephrine" (limited to human, randomized studies published in English), as well as ci...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,评审
doi:10.1213/ANE.0b013e3182124c0e
更新日期:2011-08-01 00:00:00
abstract::To determine whether anesthetics alter endothelial eicosanoid release, cultured bovine pulmonary artery endothelial cells were studied during constant flow and pressure perfusion at two oxygen tensions (hypoxia, 50 +/- 2 mm Hg; normoxia, 144 +/- 5 mm Hg; mean +/- SEM) with and without 1% halothane. Endothelialized mic...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/00000539-199212000-00022
更新日期:1992-12-01 00:00:00
abstract:BACKGROUND:The therapeutic use of opioids has been associated with altered cognition and impaired psychomotor function. Several studies have demonstrated the impact of opioid therapy on psychomotor performance and cognition, but there are no data about the effect of long-term treatment with transdermal buprenorphine on...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000281078.65585.1e
更新日期:2007-11-01 00:00:00
abstract:BACKGROUND:Performing key actions efficiently during crises can determine clinical outcomes, yet even expert clinicians omit key actions. Simulation-based studies of crises show that correct performance of key actions dramatically increases when emergency manuals (EMs) are used. Despite widespread dissemination of EMs,...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,多中心研究
doi:10.1213/ANE.0000000000005012
更新日期:2020-12-01 00:00:00
abstract:BACKGROUND:The diagnosis of postoperative cognitive dysfunction (POCD) requires complicated neuropsychological testing and is often delayed. Possible biomarkers for early detection or prediction are essential for the prevention and treatment of POCD. Preoperative screening of salivary cortisol levels may help to identi...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000003740
更新日期:2019-02-01 00:00:00
abstract:BACKGROUND:Perineural dexamethasone has gained popularity in regional anesthesia to prolong analgesia duration. However, uncertainty remains regarding the optimal perineural dose. Clarification of this characteristic is of significant importance as the administration of dexamethasone may lead to dose-dependent complica...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,meta分析,评审
doi:10.1213/ANE.0000000000002488
更新日期:2018-01-01 00:00:00
abstract::Both clonidine, an alpha(2) agonist, and morphine, an opioid agonist, provide enhanced patient analgesia after arthroscopic knee surgery when administered via the intraarticular (IA) route. Clonidine potentiates morphine analgesia in the animal model. We designed this study to determine whether clonidine or morphine r...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00000539-200005000-00018
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abstract:UNLABELLED:Thiopental is a racemate. In this study, we examined whether thiopental total body clearance and its distribution into central nervous system (CNS) tissue of rats was enantioselective. Rats, either anesthetized with halothane or conscious and restrained, were infused to stepwise steady-state targets of 5, 10...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-199907000-00042
更新日期:1999-07-01 00:00:00
abstract::Two concentrations of etidocaine (1 and 1.5%) and of pH-adjusted bupivacaine (0.5 and 0.75%, pH 6.8), all fortified with hyaluronidase, were compared as local anesthetics in regional ophthalmic surgery for cataract extraction. The series comprised 160 patients assigned randomly to four groups (n = 40). Each patient re...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1213/00000539-199307000-00026
更新日期:1993-07-01 00:00:00
abstract::Agreement between estimated fibrinogen concentration via thromboelastography and traditional assays is not established in the parturient. We therefore recruited 56 parturients and performed Clauss and functional fibrinogen level (FLEV) tests. Mean difference of measurements was 36.8 mg/dL (95% CI, 21.8-51.9) with a st...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000003301
更新日期:2019-09-01 00:00:00
abstract::This study was designed to determine whether preoperative administration of 6% hetastarch decreases the incidence and severity of hypotension after spinal anesthesia for cesarean section. Forty nonlaboring ASA class I and II women having nonurgent cesarean sections were randomized to receive either 500 mL of 6% hetast...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00000539-199510000-00031
更新日期:1995-10-01 00:00:00
abstract::The decrease of cardiac index observed during portal triad clamping (PTC) with and without pneumoperitoneum has been studied only with right heart catheterization. To better understand this decrease of cardiac index, we investigated the balance between the adequacy of preload and the ability of the heart to pump again...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ANE.0000144592.20499.12
更新日期:2005-03-01 00:00:00
abstract:UNLABELLED:Decreased hepatic blood flow, and impaired hepatic oxygen delivery caused by endotoxin, result in hepatic metabolic deterioration followed by liver dysfunction and multiple organ failure. Among phosphodiesterase III inhibitors, only olprinone increases hepatosplanchnic blood flow. We evaluated the effects of...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-200103000-00024
更新日期:2001-03-01 00:00:00
abstract::The correlation between the potency of inhaled anesthetics and their solubility in a hydrophobic phase provides an opportunity to define better the characteristics of the anesthetic site of action. The correlation implies that inhaled anesthetics act in a hydrophobic site and that the solvent used has properties repre...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/00000539-199105000-00010
更新日期:1991-05-01 00:00:00
abstract:UNLABELLED:Despite their contribution to overall perioperative treatment of patients, anesthesiologists often remain in anonymity. We evaluated the impact of business cards on physician recognition after general anesthesia. Using a questionnaire, 441 patients were interviewed for recall of the anesthesiologist's name, ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-200111000-00045
更新日期:2001-11-01 00:00:00
abstract:BACKGROUND:The relatively short duration of effect of local anesthetics has been addressed by encapsulation in drug delivery systems. Codelivery with a single compound that produces an adjuvant effect on nerve block but without intrinsic local anesthetic properties can further prolong the nerve block effect. Here, we i...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000002719
更新日期:2018-04-01 00:00:00
abstract::A new single injection procedure, the fascia iliaca compartment block, is described for blocking the femoral, lateral cutaneous, and obturator nerves. The technique consists of injecting a local anesthetic immediately behind the fascia iliaca at the union of the lateral with the two medial thirds of the inguinal ligam...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1989-12-01 00:00:00
abstract::We were interested in determining the effect of enflurane, halothane, and isoflurane on the uptake and removal of 5-hydroxytryptamine (5-HT) and phenylethylamine (PEA) from the lung. Isolated rabbit lungs were perfused in a recirculating system in vitro with 0.1 microM [14C]5-HT or 0.1 microM [14C]PEA in Krebs-Ringer ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1982-08-01 00:00:00
abstract::In this review, we summarize the clinical implications of residual neuromuscular block. Data suggest that residual neuromuscular block is a common complication in the postanesthesia care unit, with approximately 40% of patients exhibiting a train-of-four ratio <0.9. Volunteer studies have demonstrated that small degre...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,评审
doi:10.1213/ANE.0b013e3181da832d
更新日期:2010-07-01 00:00:00