Liposome encapsulation prolongs alfentanil spinal analgesia and alters systemic redistribution in the rat.

Abstract:

:The effect of liposome encapsulation on the analgesia produced by intrathecally administered alfentanil was examined in the rat. In rats prepared with chronic intrathecal catheters, alfentanil in doses of 1-50 micrograms was administered intrathecally in either saline or in multilamellar liposomes (dipalmitoylphosphatidylcholine and cholesterol). Animals were then tested for analgesia by hot-plate and paw-pressure tests. A second group of animals received intrathecal injections of 30 micrograms alfentanil in saline or liposomes, and blood samples were obtained at 5, 15, 45, and 135 min thereafter for measurement of alfentanil plasma concentrations. The liposome preparation markedly prolonged spinal analgesia in the paw-pressure test and to a lesser extent in the hot-plate test. Neither the time to peak analgesia nor the intensity of analgesia differed between the saline and liposome groups. Liposome encapsulation significantly reduced the peak alfentanil plasma concentration at 5 min and prolonged the period in which low but measurable levels of alfentanil could be measured in plasma. These pharmacokinetic data demonstrate that liposome encapsulation resulted in a slow but prolonged appearance of free alfentanil into a diffusible pool available for uptake into the spinal cord. Consistent with the lower peak plasma concentration of alfentanil, the liposome group demonstrated a significantly lower incidence of catalepsy, indicating less systemic redistribution of alfentanil to supraspinal sites. Liposome encapsulation thus appears to produce a significant reduction in peak plasma concentration with a concomitant reduction in systemic side effects and an increase in the duration of action for a given intrathecal dose of the otherwise rapidly cleared alfentanil.

journal_name

Anesthesiology

journal_title

Anesthesiology

authors

Bernards CM,Luger TJ,Malmberg AB,Hill HF,Yaksh TL

doi

10.1097/00000542-199209000-00019

subject

Has Abstract

pub_date

1992-09-01 00:00:00

pages

529-35

issue

3

eissn

0003-3022

issn

1528-1175

journal_volume

77

pub_type

杂志文章
  • Neonatal patterns of breathing after cesarean section with or without epidural fentanyl.

    abstract::The pattern of breathing and lung mechanics were evaluated during the first 7 h of life in full-term healthy newborns delivered by cesarean section with bupivacaine epidural anesthesia, without (group 1) or with the addition of 100 micrograms of fentanyl (group 2). Respiration and oxyhemoglobin saturation (SpO2) were ...

    journal_title:Anesthesiology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1097/00000542-199012000-00007

    authors: Benlabed M,Dreizzen E,Ecoffey C,Escourrou P,Migdal M,Gaultier C

    更新日期:1990-12-01 00:00:00

  • Analgesic effects of intravenous lidocaine and morphine on postamputation pain: a randomized double-blind, active placebo-controlled, crossover trial.

    abstract:BACKGROUND:Phantom and stump pains, common sequelae of limb amputations, are significant impediments to rehabilitation of amputees. The pathophysiology and optimal treatment of postamputation pain states are unclear. While stump pain may result from neuromas in the stump, phantom pain is thought to be related to cortic...

    journal_title:Anesthesiology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1097/00000542-200204000-00010

    authors: Wu CL,Tella P,Staats PS,Vaslav R,Kazim DA,Wesselmann U,Raja SN

    更新日期:2002-04-01 00:00:00

  • Hemodynamic responses to mechanical ventilation with PEEP: the effect of hypervolemia.

    abstract::The hemodynamic effects of prolonged mechanical ventilation with positive end-expiratory pressure (PEEP), with and without blood volume augmentation, were studied in 18 beagles anesthetized with halothane (0.7 per cent end-tidal). Addition of 12 cm H2O PEEP during mechanical ventilation in normavolemic dogs was associ...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-197501000-00009

    authors: Qvist J,Pontoppidan H,Wilson RS,Lowenstein E,Laver MB

    更新日期:1975-01-01 00:00:00

  • Assessment of competency in anesthesiology.

    abstract::Assessment of competency in traditional graduate medical education has been based on observation of clinical care and classroom teaching. In anesthesiology, this has been relatively easy because of the high volume of care provided by residents under the direct observation of faculty in the operating room. With the mov...

    journal_title:Anesthesiology

    pub_type: 杂志文章,评审

    doi:10.1097/01.anes.0000264778.02286.4d

    authors: Tetzlaff JE

    更新日期:2007-04-01 00:00:00

  • In vivo fluorescence-mediated tomography imaging demonstrates atorvastatin-mediated reduction of lesion macrophages in ApoE-/- mice.

    abstract:BACKGROUND:Macrophage recruitment into atherosclerotic plaques drives lesion progression, destabilization, and rupture. Chronic statin treatment reduces macrophage plaque content. Information on dynamics of macrophage recruitment would help assessing plaque vulnerability and guiding therapy. Techniques to image macroph...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/ALN.0b013e318291c18b

    authors: Larmann J,Frenzel T,Schmitz M,Hahnenkamp A,Demmer P,Immenschuh S,Tietge UJ,Bremer C,Theilmeier G

    更新日期:2013-07-01 00:00:00

  • Prediction Score for Postoperative Neurologic Complications after Brain Tumor Craniotomy: A Multicenter Observational Study.

    abstract:WHAT WE ALREADY KNOW ABOUT THIS TOPIC:WHAT THIS ARTICLE TELLS US THAT IS NEW: BACKGROUND:: Craniotomy for brain tumor displays significant morbidity and mortality, and no score is available to discriminate high-risk patients. Our objective was to validate a prediction score for postoperative neurosurgical complications...

    journal_title:Anesthesiology

    pub_type: 杂志文章,多中心研究

    doi:10.1097/ALN.0000000000002426

    authors: Cinotti R,Bruder N,Srairi M,Paugam-Burtz C,Beloeil H,Pottecher J,Geeraerts T,Atthar V,Guéguen A,Triglia T,Josserand J,Vigouroux D,Viquesnel S,Lakhal K,Galliez M,Blanloeil Y,Le Thuaut A,Feuillet F,Rozec B,Asehnoune K

    更新日期:2018-12-01 00:00:00

  • Halothane and enflurane constrict canine mesenteric arteries by releasing Ca2+ from intracellular Ca2+ stores.

    abstract:BACKGROUND:Recent studies suggest that volatile anesthetics cause not only vasodilation but also vasoconstriction, depending on the experimental conditions. However, the mechanism of the constrictive effect of volatile anesthetics has not been clarified. The aim of this study was to evaluate the vasoconstrictor effects...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-199405000-00021

    authors: Kakuyama M,Hatano Y,Nakamura K,Toda H,Terasako K,Nishiwada M,Mori K

    更新日期:1994-05-01 00:00:00

  • Neurologic evaluation of infant and adult rats before and after sciatic nerve blockade.

    abstract:BACKGROUND:Only limited data exist comparing differences in sensory function and responses to neural blockade in infant and adult rats. Therefore, the authors sought (1) to compare baseline thermal, proprioceptive, and postural responses in infant, adolescent, and adult rats; and (2) to compare the effects of sciatic n...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-199704000-00026

    authors: Hu D,Hu R,Berde CB

    更新日期:1997-04-01 00:00:00

  • Performance assessment in airway management training for nonanesthesiology trainees: an analysis of 4,282 airway procedures performed at a level-1 trauma center.

    abstract:BACKGROUND:Although the use of an anesthesiology "airway" rotation to train the nonanesthesiologist is commonly employed, little data exist on the utility, clinical exposure, and outcomes of these programs. METHODS:A prospectively collected observational dataset of airway procedures completed by trainees in a 4-week, ...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/ALN.0000000000000064

    authors: Grissom TE,Sappenfield J,Galvagno SM Jr,Cherry SV,Chang YC,Hu PF

    更新日期:2014-01-01 00:00:00

  • Patient selection for day case-eligible surgery: identifying those at high risk for major complications.

    abstract:BACKGROUND:Due to economic pressures and improvements in perioperative care, outpatient surgical procedures have become commonplace. However, risk factors for outpatient surgical morbidity and mortality remain unclear. There are no multicenter clinical data guiding patient selection for outpatient surgery. The authors ...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/ALN.0000000000000005

    authors: Mathis MR,Naughton NN,Shanks AM,Freundlich RE,Pannucci CJ,Chu Y,Haus J,Morris M,Kheterpal S

    更新日期:2013-12-01 00:00:00

  • Local versus central effect of halothane on carotid sinus baroreceptor function.

    abstract::Depressive effect of halothane on carotid sinus baroreceptor function may be due to direct local action, in the CNS, or both. Paris of dogs were anesthetized with pentobarbital and ventilated with oxygen. The carotid sinus of the recipient dog was isolated and perfused with blood from the common carotid artery of the ...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-198408000-00009

    authors: Behnia R,Koushanpour E

    更新日期:1984-08-01 00:00:00

  • Low-dose propofol-induced amnesia is not due to a failure of encoding: left inferior prefrontal cortex is still active.

    abstract:BACKGROUND:Propofol may produce amnesia by affecting encoding. The hypothesis that propofol weakens encoding was tested by measuring regional cerebral blood flow during verbal encoding. METHODS:Seventeen volunteer participants (12 men; aged 30.4 +/- 6.5 yr) had regional cerebral blood flow measured using H2O positron ...

    journal_title:Anesthesiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1097/ALN.0b013e31817fd8ae

    authors: Veselis RA,Pryor KO,Reinsel RA,Mehta M,Pan H,Johnson R Jr

    更新日期:2008-08-01 00:00:00

  • Use of linear programming to estimate impact of changes in a hospital's operating room time allocation on perioperative variable costs.

    abstract:BACKGROUND:Administrators at hospitals with a fixed annual budget may want to focus surgical services on priority areas to ensure its community receives the best health services possible. However, many hospitals lack the detailed managerial accounting data needed to ensure that such a change does not increase operating...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-200203000-00031

    authors: Dexter F,Blake JT,Penning DH,Sloan B,Chung P,Lubarsky DA

    更新日期:2002-03-01 00:00:00

  • Etymology of Letheon: Nineteenth-century Linguistic Effervescence.

    abstract::In late 1846, following his successful public demonstrations of surgical anesthesia, Boston dentist William T. G. Morton selected Letheon as the commercial name for the ether-based "preparation" he had used to produce insensibility to pain. We have not identified a first-hand account of the coinage of Letheon. Althoug...

    journal_title:Anesthesiology

    pub_type: 历史文章,杂志文章

    doi:10.1097/ALN.0000000000002969

    authors: Haridas RP,Gionfriddo M,Bause GS

    更新日期:2019-12-01 00:00:00

  • Preoperative electrocardiograms: patient factors predictive of abnormalities.

    abstract:BACKGROUND:Age is often the sole criterion for determining the need for preoperative electrocardiograms. However, screening electrocardiograms have not been shown to add value above clinical information. This study was designed to determine whether it is possible to target electrocardiograms ordering to patients most l...

    journal_title:Anesthesiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1097/ALN.0b013e31819fb139

    authors: Correll DJ,Hepner DL,Chang C,Tsen L,Hevelone ND,Bader AM

    更新日期:2009-06-01 00:00:00

  • Hamilton acute pain service safety study: using root cause analysis to reduce the incidence of adverse events.

    abstract:BACKGROUND:Although intravenous patient-controlled analgesia opioids and epidural analgesia offer improved analgesia for postoperative patients treated on an acute pain service, these modalities also expose patients to some risk of serious morbidity and even mortality. Root cause analysis, a process for identifying the...

    journal_title:Anesthesiology

    pub_type: 杂志文章,多中心研究

    doi:10.1097/ALN.0b013e3182a76f59

    authors: Paul JE,Buckley N,McLean RF,Antoni K,Musson D,Kampf M,Buckley D,Marcoux M,Frketich R,Thabane L,Cheng J

    更新日期:2014-01-01 00:00:00

  • Gestational differences in lidocaine toxicity in the fetal lamb.

    abstract::Effects of lidocaine on arterial pressure, heart rate and electrocortical activity were studied in nine fetal lambs at 0.77 to 0.92 gestation (116 to 138 days of gestation; term in sheep is 150 days). Lidocaine was administered into a fetal femoral vein either as a continuous infusion or as a bolus injection. Epilepti...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-197602000-00008

    authors: Teramo K,Benowitz N,Heymann MA,Rudolph AM

    更新日期:1976-02-01 00:00:00

  • Opioid Abuse or Dependence Increases 30-day Readmission Rates after Major Operating Room Procedures: A National Readmissions Database Study.

    abstract:BACKGROUND:Although opioids remain the standard therapy for the treatment of postoperative pain, the prevalence of opioid misuse is rising. The extent to which opioid abuse or dependence affects readmission rates and healthcare utilization is not fully understood. It was hypothesized that surgical patients with a histo...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/ALN.0000000000002136

    authors: Gupta A,Nizamuddin J,Elmofty D,Nizamuddin SL,Tung A,Minhaj M,Mueller A,Apfelbaum J,Shahul S

    更新日期:2018-05-01 00:00:00

  • Inhibition of interferon stimulation of natural killer cell activity in mice anesthetized with halothane or isoflurane.

    abstract:BACKGROUND:Basal cytotoxic activity of NK cells, a subtype of lymphocytes involved in the nonspecific immune response to viruses, tumors, and some bacteria, is altered in the postoperative period. The current study examines the effects of halothane and isoflurane on interferon-induced stimulation of NK cell cytotoxicit...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-199304000-00013

    authors: Markovic SN,Knight PR,Murasko DM

    更新日期:1993-04-01 00:00:00

  • Effect of antiemetic therapy on recovery and hospital discharge time. A double-blind assessment of ondansetron, droperidol, and placebo in pediatric patients undergoing ambulatory surgery.

    abstract:BACKGROUND:Postoperative nausea and vomiting continue to be a significant problem for pediatric ambulatory surgery patients. Although ondansetron has been demonstrated to be effective in the prophylactic treatment of postoperative nausea and vomiting (surrogate end point) no one has demonstrated a benefit of antiemetic...

    journal_title:Anesthesiology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1097/00000542-199511000-00007

    authors: Davis PJ,McGowan FX Jr,Landsman I,Maloney K,Hoffmann P

    更新日期:1995-11-01 00:00:00

  • Glycine transporter inhibitors as a potential therapeutic strategy for chronic pain with memory impairment.

    abstract:BACKGROUND:Impaired excitatory and inhibitory balance in the spinal dorsal horn has a crucial role in the pathophysiology of chronic pain. The authors addressed the therapeutic impact of increasing spinal glycine applied exogenously or via blockade of glycine transporter 1 using its selective inhibitors sarcosine and N...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/ALN.0b013e31816c9044

    authors: Tanabe M,Takasu K,Yamaguchi S,Kodama D,Ono H

    更新日期:2008-05-01 00:00:00

  • Thoracic epidural anesthesia increases mucosal perfusion in ileum of rats.

    abstract:BACKGROUND:Previous studies reported that thoracic epidural anesthesia (TEA) protected against a decrease in gastric intramucosal pH, suggesting that TEA increased gut mucosal perfusion. The current study examines the effects of TEA on ileal mucosa using intravital microscopy in anesthetized rats. METHODS:Nineteen rat...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-200009000-00036

    authors: Sielenkämper AW,Eicker K,Van Aken H

    更新日期:2000-09-01 00:00:00

  • Effects of halothane and isoflurane on beta-adrenoceptor-mediated responses in the vascular smooth muscle of rat aorta.

    abstract:BACKGROUND:Although previous studies have proposed that anesthetics may influence signal transduction systems, their effects on the beta-adrenoceptor-mediated system have not been fully characterized in vascular smooth muscle. The aim of this study was to determine how halothane and isoflurane affect beta-adrenoceptor-...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-199811000-00022

    authors: Tanaka S,Tsuchida H

    更新日期:1998-11-01 00:00:00

  • Safety assessment and pharmacokinetics of intrathecal methylprednisolone acetate in dogs.

    abstract:BACKGROUND:Intrathecal methylprednisolone acetate (MPA) has been used in patients with chronic pain syndromes. Its safety has been debated after reports of adverse events. No systematic preclinical evaluation of MPA has been reported. In the current study, the acute and long-term effects of intrathecal MPA on dog spina...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/ALN.0b013e31823cf035

    authors: Rijsdijk M,van Wijck AJ,Kalkman CJ,Meulenhoff PC,Grafe MR,Steinauer J,Yaksh TL

    更新日期:2012-01-01 00:00:00

  • Hemodilution with oxyhemoglobin. Mechanism of oxygen delivery and its superaugmentation with a nitric oxide donor (sodium nitroprusside).

    abstract:BACKGROUND:Hemodilution (HD) with oxyhemoglobin colloid (oxyHb) provides a greater arterial oxygen content (CaO2) than HD with conventional colloids; however, oxygen delivery (DO2) is essentially the same, because, in contrast to conventional HD, cardiac output (CO) is not augmented. This study seeks to elucidate the m...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-199307000-00011

    authors: Rooney MW,Hirsch LJ,Mathru M

    更新日期:1993-07-01 00:00:00

  • Effects of pre- and postischemic administration of thiopental on transmitter amino acid release and histologic outcome in gerbils.

    abstract:BACKGROUND:The mechanism by which barbiturates protect neurons against ischemia is unclear, particularly when they are given after ischemia or reperfusion begins. Because an excess release of excitatory neurotransmitters causes postsynaptic membrane depolarization, which triggers neuronal damage in ischemia, the effect...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-199612000-00024

    authors: Amakawa K,Adachi N,Liu K,Ikemune K,Fujitani T,Arai T

    更新日期:1996-12-01 00:00:00

  • The actions of halothane, ibuprofen and BW755C on hypoxic pulmonary vasoconstriction.

    abstract::The effect of halothane on the pressor responses to hypoxia (3% O2, 5% CO2, balance N2) and to Angiotensin II (Ang II) (0.2 microgram) has been compared in an in vitro perfused and ventilated rat lung preparation in the presence and absence of agents known to block the lipoxygenase (BW755C) and/or the cyclooxygenase (...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-198704000-00015

    authors: Marshall C,Kim SD,Marshall BE

    更新日期:1987-04-01 00:00:00

  • Does the investing layer of the deep cervical fascia exist?

    abstract:BACKGROUND:The placement of the superficial cervical plexus block has been the subject of controversy. Although the investing cervical fascia has been considered as an impenetrable barrier, clinically, the placement of the block deep or superficial to the fascia provides the same effective anesthesia. The underlying me...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-200511000-00010

    authors: Nash L,Nicholson HD,Zhang M

    更新日期:2005-11-01 00:00:00

  • Identification of cytochrome P450 2E1 as the predominant enzyme catalyzing human liver microsomal defluorination of sevoflurane, isoflurane, and methoxyflurane.

    abstract:BACKGROUND:Renal and hepatic toxicity of the fluorinated ether volatile anesthetics is caused by biotransformation to toxic metabolites. Metabolism also contributes significantly to the elimination pharmacokinetics of some volatile agents. Although innumerable studies have explored anesthetic metabolism in animals, the...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-199310000-00023

    authors: Kharasch ED,Thummel KE

    更新日期:1993-10-01 00:00:00

  • Cardiovascular events in the postanesthesia care unit: contribution of risk factors.

    abstract:BACKGROUND:The purpose of this study was to determine the relationship of four postanesthesia care unit (PACU) cardiovascular events to long-term outcomes (unplanned critical care admission or mortality) and to evaluate the contribution of anesthetic management compared with other perioperative factors in predicting th...

    journal_title:Anesthesiology

    pub_type: 杂志文章

    doi:10.1097/00000542-199604000-00003

    authors: Rose DK,Cohen MM,DeBoer DP

    更新日期:1996-04-01 00:00:00