Abstract:
UNLABELLED:We investigated the direct effects of midazolam and diazepam on cardiac excitation-contraction coupling in adult rat ventricular myocytes. Freshly isolated rat ventricular myocytes were loaded with fura-2/AM and field-stimulated at 28 degrees C. Intracellular Ca(2+) transients (340:380 ratio) and myocyte shortening (video edge detection) were simultaneously monitored in individual cells. Midazolam (3-100 micro M) caused a dose-dependent decrease in both peak intracellular Ca(2+) and cell shortening. Diazepam (30 and 100 micro M) increased myocyte shortening and peak Ca(2+) concomitant with a decrease in time to peak Ca(2+). A larger concentration of diazepam (>300 micro M) nearly abolished intracellular Ca(2+) and cell shortening. Midazolam (100 micro M) and diazepam (300 micro M) decreased the amount of Ca(2+) released from intracellular stores in response to caffeine. Diazepam (30 micro M), but not midazolam (10 micro M), caused a downward shift in the dose-response curve to extracellular Ca(2+) for shortening, with no concomitant effect on peak intracellular Ca(2+) transient. These results indicate that midazolam and diazepam have different inotropic effects on cardiac excitation-contraction coupling at the cellular level, which is mediated by altering the availability of intracellular-free Ca(2+). However, the benzodiazepines have no direct influence on excitation-contraction coupling in rat ventricular myocytes, except at very large doses. Inhibition of Ca(2+) release from caffeine-sensitive intracellular Ca(2+) stores may play some part in myocardial depression at the larger concentrations of benzodiazepines. Diazepam, but not midazolam, decreased myofilament responsiveness to Ca(2+). IMPLICATIONS:Midazolam and diazepam differentially alter the cardiac excitation-contraction coupling at the cellular level, which is mediated by altering the availability of intracellular free Ca(2+) in adult rat ventricular myocytes. In addition, diazepam, but not midazolam, decreases myofilament Ca(2+) sensitivity. However, the benzodiazepines have no direct influence on excitation-contraction coupling, except at very large doses.
journal_name
Anesth Analgjournal_title
Anesthesia and analgesiaauthors
Kanaya N,Murray PA,Damron DSdoi
10.1097/00000539-200212000-00030subject
Has Abstractpub_date
2002-12-01 00:00:00pages
1637-44, table of contentsissue
6eissn
0003-2999issn
1526-7598journal_volume
95pub_type
杂志文章abstract:IMPLICATIONS:Complications of IV mannitol administration resulting in compartment syndrome may warrant surgical intervention. Compartment syndrome is difficult to diagnose in the anesthetized patient. Infusing mannitol in an observed IV site permits discontinuation of mannitol before complications ensue. Early recognit...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-200301000-00049
更新日期:2003-01-01 00:00:00
abstract:UNLABELLED:We compared the effects of oral clonidine (4 microg/kg) and midazolam (0.5 mg/kg) on the preanesthetic sedation and postoperative recovery profile in children during tonsillectomy with or without adenoidectomy. In a double-blinded, double-dummy study design, 134 ASA physical status I-II children aged 4-12 yr...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00000539-200101000-00011
更新日期:2001-01-01 00:00:00
abstract:UNLABELLED:The Anesthetic Conserving Device (ACD) is a high-flow anesthesia system closed to volatile anesthetics only. We compared the ACD with a circle system under different fresh gas flow (FGF) conditions. Eighty-one patients undergoing major surgery were randomly allocated to receive sevoflurane from a circle circ...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1213/01.ane.0000050558.89090.95
更新日期:2003-04-01 00:00:00
abstract::Sodium nitroprusside-induced cyanide intoxication has been demonstrated in the laboratory animal and has been experienced clinically during induced hypotensive anesthesia. This is a care report of a successful resuscitation of a severe cardiovascular collapse secondary to suspected sodium nitroprusside-induced cyanide...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/00000539-197707000-00015
更新日期:1977-07-01 00:00:00
abstract:UNLABELLED:Clinical and basic science studies suggest that spinal alpha-2-adrenergic receptor agonists and local anesthetics produce analgesia, but interaction between alpha-2-adrenergic receptor agonists and local anesthetics in the persistent pain model has not been examined. In the present study, using isobolographi...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-200103000-00034
更新日期:2001-03-01 00:00:00
abstract:UNLABELLED:The National Institute for Occupational Safety and Health-recommended exposure levels for nitrous oxide exposure are 25 ppm as a time-weighted average over the time of exposure. The exposure limit for halogenated anesthetics (without concomitant nitrous oxide exposure) is 2 ppm. Inhaled sevoflurane provides ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-199904000-00045
更新日期:1999-04-01 00:00:00
abstract::A 91-yr-old man (57 kg, 156 cm, ASA III) received an infraclavicular brachial plexus block for surgery of bursitis of the olecranon. Twenty minutes after infraclavicular injection of 30 mL of mepivacaine 1% (Scandicain) and 5 min after supplementation of 10 mL of prilocaine 1% (Xylonest) using an axillary approach, th...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ane.0b013e3181683dd7
更新日期:2008-05-01 00:00:00
abstract:UNLABELLED:This study was performed to evaluate the ability of anesthesiologists to differentiate between sevoflurane, a newer, more expensive anesthetic, and halothane. A total of 113 assessments were made by 36 anesthesiologists on 58 children, aged 6 mo to 6 yr, scheduled for bilateral myringotomy and tube placement...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00000539-199712000-00004
更新日期:1997-12-01 00:00:00
abstract:UNLABELLED:We conducted a randomized, controlled, cross-over cadaver study to test the hypothesis that the efficacy of seal for ventilation and airway protection, anatomic position, and airway patency with the flexible laryngeal mask airway (FLMA) are altered by the application of a Boyle Davis (B-D) gag. We also deter...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00000539-199907000-00032
更新日期:1999-07-01 00:00:00
abstract:UNLABELLED:Adenosine and adenosine analogs induce analgesia in humans and presumed antinociception in animal models when administered both systemically and intrathecally. In the present investigation in rats, we studied the effects of intrathecally administered adenosine analogs, with or without systemic coadministrati...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-199709000-00025
更新日期:1997-09-01 00:00:00
abstract:BACKGROUND:Inhalation agents are being used in place of intravenous agents to provide sedation in some intensive care units. We performed a systematic review and meta-analysis of prospective randomized controlled trials, which compared the use of volatile agents versus intravenous midazolam or propofol in critical care...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,meta分析,评审
doi:10.1213/ANE.0000000000001634
更新日期:2017-04-01 00:00:00
abstract:BACKGROUND:The analgesic efficacy of transversus abdominis plane (TAP) block has been established for patients undergoing abdominal surgery. We evaluated the efficacy of a novel approach to TAP block for postoperative analgesia after colorectal surgery. METHODS:Forty adult ASA physical status I to III patients undergo...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,随机对照试验
doi:10.1213/ANE.0b013e3182159bf8
更新日期:2011-06-01 00:00:00
abstract::Catecholamine and serotonin concentrations in the cord, medulla, and hypothalamus were measured in rats after saline, after sufentanil sufficient to reduce the minimum alveolar concentration (MAC) of halothane by 30% or less, or after sufentanil sufficient to reduce the MAC of halothane by 80% or more. In the cord, hi...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1985-09-01 00:00:00
abstract::Substance abuse is a potentially lethal occupational hazard confronting anesthesiology residents. We present the results of a survey sent to all United States anesthesiology training programs regarding experience with and outcomes of chemically dependent residents from 1991 to 2001. The response rate was 66%. Eighty p...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ANE.0000180837.78169.04
更新日期:2005-11-01 00:00:00
abstract::Lung dysfunction after cardiopulmonary bypass and lung transplantation results from oxidant-mediated cellular damage. Previously, we observed the shedding of angiotensin-converting enzyme (ACE) from the endothelial cell surface to be a more sensitive and earlier marker of oxidative lung endothelial injury than lung we...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ANE.0000147707.49192.88
更新日期:2005-04-01 00:00:00
abstract::In this study we investigated the effects of a racemic mixture of bupivacaine (RS(+/-)bupivacaine) and its isomers (S(-)bupivacaine and R(+)bupivacaine) on the Ca2+ handling by ventricular myocytes from Wistar rats. Single ventricular myocytes were enzymatically isolated and loaded with the fluorescent Ca2+ indicator ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000195341.65260.87
更新日期:2006-03-01 00:00:00
abstract:BACKGROUND:Predicting blood product transfusion requirements during orthotopic liver transplantation (OLT) remains difficult. Our primary aim in this study was to determine which patient variables best predict recipient risk for large blood transfusion requirements during OLT. The secondary aim was to determine whether...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e3182a76f19
更新日期:2014-02-01 00:00:00
abstract::The present investigation explored the possibility that the commonly observed hypotension that occurs during induction of anesthesia with propofol might be related to its ability to produce venodilation. Thirty-six ASA I and II patients who received no premedication were studied. The first 20 patients were divided int...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1213/00000539-199206000-00017
更新日期:1992-06-01 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::An in vitro model was used to determine the force required to pierce bovine dura with a range of new spinal needles and to measure the subsequent leakage rate of cerebrospinal fluid (CSF). A significantly greater force was required to pierce the dura with pencil-point style needles compared to Quincke needles of the s...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/00000539-199410000-00026
更新日期:1994-10-01 00:00:00
abstract::There is precedent in medicine for recognizing and accepting intact decisional capacity and the subsequent ability to provide valid consent in one treatment domain, while simultaneously recognizing that the patient lacks decisional capacity in other domains. As such, obtaining consent for anesthesia for a surgical pro...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e3181c7eb12
更新日期:2010-02-01 00:00:00
abstract:BACKGROUND:There is a pronounced learning curve for the technique of ultrasound-guided regional anesthesia. Practicing with a simulator model has been shown to speed the acquisition of these skills for various ultrasound-guided procedures. However, commercial models for ultrasound-guided regional anesthesia may be too ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e3181cc558b
更新日期:2010-04-01 00:00:00
abstract::Since clonidine potentiates the analgesia by morphine, the current study was performed to investigate whether oral clonidine premedication would enhance the postoperative analgesia by intrathecal morphine. Twenty-six patients, aged 37-60 yr, schedule for abdominal total hysterectomy under spinal anesthesia, were studi...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00000539-199606000-00016
更新日期:1996-06-01 00:00:00
abstract::Morphine plasma concentrations were determined in six patients receiving kidney transplants from living-related donors, and nine patients receiving kidney transplants from cadavers. The total cold ischemic time was about 2 hr for kidneys from living-related donors and 14 hr for those from cadavers. After an intravenou...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1985-11-01 00:00:00
abstract:BACKGROUND:Preoperative flushing of an anesthesia workstation is an alternative for preparation of the anesthesia workstation before use in malignant hyperthermia-susceptible patients (MHS). We studied in vitro, using a test lung, the washout profile of sevoflurane in 7 recent workstations during adult and, for the fir...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000000208
更新日期:2014-07-01 00:00:00
abstract:BACKGROUND:Although invasive monitoring is the standard method for intracranial pressure (ICP) measurement, it is not without potential for serious complications. Noninvasive methods have been proposed as alternatives to invasive ICP monitoring. The study aimed to investigate the diagnostic accuracy of the currently av...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000005189
更新日期:2020-09-24 00:00:00
abstract:BACKGROUND:Whether nitrous oxide (N(2)O) increases the incidence of postoperative nausea and vomiting (PONV) after laparoscopic gynecologic surgery is still controversial, which may be due to the administration of different concentrations of inspired N(2)O. We investigated whether N(2)O results in a dose-response incre...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,随机对照试验
doi:10.1213/ane.0b013e318181f4aa
更新日期:2008-09-01 00:00:00
abstract:UNLABELLED:We evaluated, by using a before-and-after study, the influence of leukoreduction by filtration on postoperative infections and adverse outcomes in patients undergoing elective major aortic surgery. From January 1995 to October 2000, all patients who underwent elective abdominal aortic surgery were included i...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-200203000-00010
更新日期:2002-03-01 00:00:00
abstract::The Augustine Guide (AG) allows oral endotracheal intubations to be performed blindly; head and neck manipulation are unnecessary. It is a premolded device designed to fit in a lock and key fashion in the glottis, thus serving as a guide to allow blind laryngeal insertion of an endotracheal tube. Intubation success ra...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/00000539-199405000-00026
更新日期:1994-05-01 00:00:00
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