Abstract:
:In in vitro pharmacological experiments, determination of effective concentration values for various anesthetics depends on understanding the exact concentration of the drugs dissolved in physiological solutions. Actual anesthetic concentration may differ from expectations because of drug adsorption, absorption or other loss, especially in tubing. We tested the hypothesis that delivered concentrations of anesthetics decrease when solutions pass through laboratory tubing and investigated such loss by measuring the entering and exiting dissolved concentrations of two volatile (sevoflurane and isoflurane) and two gaseous (nitrous oxide and xenon) anesthetics. We tested solutions passed through tubes (1 m x 2 mm ID x 4 mm OD) made of five different materials (glass, Teflon, polyethylene (PE), polyvinyl chloride (PVC), and silicon rubber). Exiting concentrations of anesthetics were significantly reduced when they were passed through PVC (>33%) and silicon (>43%) tubes. There were no decreases in anesthetic concentrations with glass, Teflon, or PE tubes. When sevoflurane solution flowed through PVC and silicon tubes, it took 20 and 30 min, respectively, after start of flow until the anesthetic loss became negligible. These results indicate that frequently used PVC and silicon tubes, whereas flexible and easy to handle, have serious drawbacks when used in inhaled anesthetic pharmacology experiments.
journal_name
Anesth Analgjournal_title
Anesthesia and analgesiaauthors
Suzuki T,Uchida I,Mashimo Tdoi
10.1213/01.ANE.0000142112.30807.5Csubject
Has Abstractpub_date
2005-02-01 00:00:00pages
427-30issue
2eissn
0003-2999issn
1526-7598pii
100/2/427journal_volume
100pub_type
杂志文章abstract:BACKGROUND:Perioperative major adverse cardiovascular and cerebrovascular events (MACCEs) are incompletely understood, and risk prediction is imprecise. Atherogenic leukocytes are crucial in cardiovascular events. However, it is unclear if surgical interventions affect leukocyte counts or activation status. Therefore, ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000003738
更新日期:2019-06-01 00:00:00
abstract:UNLABELLED:Symptoms of orthostatic intolerance are common after general anesthesia and are associated with an increased risk of postoperative morbidity. The contribution of orthostatic hypotension (OH) has not been well defined. We conducted a head-up tilt test on patients after general anesthesia for minor surgery to ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000093388.17298.90
更新日期:2004-01-01 00:00:00
abstract::In pregnant patients with myasthenia gravis and respiratory compromise, neuraxial anesthesia for lower abdominal surgery can risk further respiratory depression. We report the use of epidural anesthesia for dilation and curettage and tubal ligation in a 26-yr-old woman with a 12-wk intrauterine pregnancy with severe m...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000198335.89760.ed
更新日期:2006-03-01 00:00:00
abstract::Sevoflurane reduces autonomic neural control, which plays a significant role in cerebral autoregulation. Therefore, we hypothesized that sevoflurane influences cerebral autoregulation. We investigated the effects of sevoflurane on dynamic cerebral blood flow (CBF) autoregulation by using spectral and transfer function...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000189056.96273.48
更新日期:2006-02-01 00:00:00
abstract:IMPLICATIONS:We measured plasma propofol levels by head space-gas chromatography analysis using solid-phase microextraction. This method saves time, and does not require elimination of interfering substances in the plasma. The coefficient variation was +/-5% to +/-30%. The detection limit was 10 ng/mL. ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-200006000-00038
更新日期:2000-06-01 00:00:00
abstract::We describe an unusual complication during flotation of a pulmonary artery catheter through a preexisting percutaneous introducer sheath. A malfunctioning pulmonary artery catheter, which was placed through an introducer sheath in the right internal jugular vein, was removed. Attempts at repositioning a second pulmona...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ANE.0000133244.59867.6F
更新日期:2004-09-01 00:00:00
abstract::Availability of physiologic monitoring equipment to ensure the safe administration of anesthesia is an expected standard in many parts of the world. Many hospitals in China may not have an adequate quantity and variety of anesthesia delivery and patient monitoring equipment to assure safe administration of anesthesia ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e31825018cf
更新日期:2012-06-01 00:00:00
abstract::Spine surgery is associated with a wide range of surgical and anesthetic complications. Excessive cerebrospinal fluid leak can be a cause of cerebellar hemorrhage postoperatively. We report a 43-yr-old patient who had lumbar spine reexploration surgery complicated by a cerebrospinal fluid leak which led to cerebellar ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ANE.0000143340.51813.6A
更新日期:2005-02-01 00:00:00
abstract:BACKGROUND:The number of elderly patients with frank or incipient Alzheimer's disease (AD) requiring surgery is growing as the population ages. General anesthesia may exacerbate symptoms of and the pathology underlying AD, so minimizing anesthetic exposure may be important. This requires knowledge of whether the contin...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e3181b5a292
更新日期:2010-02-01 00:00:00
abstract:BACKGROUND:Oral opioid formulations contribute to postoperative analgesia. In this study, we evaluated the perioperative application of oral controlled-release oxycodone to reduce postoperative IV morphine consumption and opioid side effects after lumbar discectomy. METHODS:Forty patients scheduled for elective lumbar...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,随机对照试验
doi:10.1213/01.ane.0000266451.77524.0d
更新日期:2007-07-01 00:00:00
abstract::Preoperative local anesthetic blockade of somatosensory pathways involved with skin incision and other noxious perioperative stimuli may "preempt" or attenuate the postoperative pain response. Since the Pfannenstiel incision lies within the L1 dermatome, bilateral ilioinguinal, iliohypogastric nerve blocks (IINBs) sho...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00000539-199601000-00003
更新日期:1996-01-01 00:00:00
abstract:BACKGROUND:Unicondylar knee arthroplasty (UKA) is a commonly performed procedure with significant expected postoperative pain. Peripheral nerve blocks are 1 analgesic option, but some approaches may decrease quadriceps motor strength and interfere with early ambulation. In this study, we compared the analgesia provided...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,随机对照试验
doi:10.1213/ANE.0000000000001162
更新日期:2016-04-01 00:00:00
abstract:BACKGROUND:Previous studies demonstrated that MAC (the minimum alveolar concentration of an inhaled anesthetic that produces immobility in 50% of subjects exposed to noxious stimulation) for halothane directly correlates with the central nervous system concentration of Na+. However, those studies globally altered Na+ c...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000278090.88402.26
更新日期:2007-09-01 00:00:00
abstract::This study was designed to compare the efficacy of 6% hetastarch to that of crystalloid administration in reducing the incidence and severity of hypotension during spinal anesthesia. Forty ASA grade I patients scheduled for postpartum tubal ligations under spinal anesthesia were randomly allocated to receive either 50...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00000539-199701000-00021
更新日期:1997-01-01 00:00:00
abstract:BACKGROUND:Dexmedetomidine, an α(2)-receptor agonist, prolongs analgesia when used in neuraxial and IV blocks. We evaluated the effect of dexmedetomidine added to ropivacaine for tibial nerve block on the duration of the sensory blockade. METHODS:For this prospective, randomized, controlled, double-blind, crossover tr...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,随机对照试验
doi:10.1213/ANE.0b013e318265bab7
更新日期:2012-10-01 00:00:00
abstract:BACKGROUND:The proportion of live births by cesarean delivery (CD) in China is significant, with some, particularly rural, provinces reporting up to 62.5%. The No Pain Labor & Delivery-Global Health Initiative (NPLD-GHI) was established to improve obstetric and neonatal outcomes in China, including through a reduction ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000004805
更新日期:2020-04-22 00:00:00
abstract::Complement activation and the resulting inflammatory response is an important potential mechanism for multisystem organ injury in cardiac surgery. Novel therapeutic strategies using complement inhibitors may hold promise for improving outcomes for cardiac surgical patients by attenuating complement activation or its b...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,评审
doi:10.1213/ANE.0b013e3182652b7d
更新日期:2012-10-01 00:00:00
abstract:UNLABELLED:Evidence suggests that early postischemic hyperemia is mediated by both neurological and vascular mechanisms. We hypothesized that if neuronal activity were primarily responsible for reperfusion hyperemia, then electrocerebral silence induced by intracarotid anesthetics (propofol and pentothal) would attenua...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000112320.77816.fa
更新日期:2004-05-01 00:00:00
abstract:UNLABELLED:We conducted a double-blinded study in 90 patients undergoing elective arthroscopic knee surgery to determine whether there is a role of inflammation in the analgesic efficacy of intraarticular piroxicam. Standardized general anesthetic techniques were used for all patients. At the end of the operation, afte...
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.0000081725.81280.17
更新日期:2003-10-01 00:00:00
abstract:BACKGROUND:The cerebral perfusion pressure that denotes the lower limit of cerebral blood flow autoregulation (LLA) is generally considered to be equivalent for reductions in arterial blood pressure (ABP) or increases in intracranial pressure (ICP). However, the effect of decreasing ABP at different levels of ICP has n...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ane.0b013e3181964848
更新日期:2009-04-01 00:00:00
abstract::We investigated the usefulness of peripheral flow index (PFI) measurement using a standard pulse oximetry digit probe for early prediction of successful regional blocks. Sixty-six patients scheduled for limb surgery underwent either axillary or sciatic block using a nerve stimulator technique with mepivacaine 1.5%. PF...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000220947.02689.9f
更新日期:2006-07-01 00:00:00
abstract:UNLABELLED:A new CO(2) absorbent, Amsorb (A), which does not contain monovalent bases, is ideal because it does not degrade volatile anesthetics to either Compound A (from sevoflurane) or carbon monoxide (from desflurane, enflurane, or isoflurane). The CO(2) absorption capacity of A, however, has not been investigated ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-200107000-00044
更新日期:2001-07-01 00:00:00
abstract:BACKGROUND:The wide need for analgesia, anesthesia, and sedation in children and the lack of pediatric labeling leads to widespread off-label use of medications for pain and sedation in children. Any attempt to address the lack of labeling will require national estimates of the numbers of children using each medication...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e31825b6fb2
更新日期:2012-11-01 00:00:00
abstract::Ketamine given IV in a dose of 2 mg/kg caused a significant reduction in Pao2 in 7 patients spontaneously breathing with an unassisted airway. Under the same conditions, in 7 patients, ketamine (2 mg/kg IV) preceded by diazepam (0.2 mg/kg IV) also caused a reduction in Pao2 not significantly different from that caused...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/00000539-197605000-00005
更新日期:1976-05-01 00:00:00
abstract:UNLABELLED:The Meyer-Overton hypothesis predicts that the potency of conventional inhaled anesthetics correlates inversely with lipophilicity: minimum alveolar anesthetic concentration (MAC) x the olive oil/gas partition coefficient equals a constant of approximately 1.82 +/- 0.56 atm (mean +/- SD), whereas MAC x the o...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-199904000-00035
更新日期:1999-04-01 00:00:00
abstract::We have determined that the mixed agonist-antagonist narcotic, butorphanol, improves CO2 response and ventilation after fentanyl anesthesia. A tentative dosage range has been established. Twenty-two patients were anesthetized with isoflurane, nitrous oxide, and fentanyl, which was continuously infused throughout the s...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1987-06-01 00:00:00
abstract::Epinephrine-induced dysrhythmias were studied in 19 dogs anesthetized with 1.25 MAC enflurane or isoflurane, or the same preceded by thiopental (20 mg/kg). In 11 (group 1) dogs, thiopental reduced the dose of epinephrine required for production of ventricular ectopy, bigeminy and tachycardia with enflurane, and only v...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1986-05-01 00:00:00
abstract::A randomized double-blind study was conducted in 50 orthopedic patients to determine the effect of epinephrine and phenylephrine on the anesthetic properties of intrathecally administered tetracaine. Two doses of each vasoconstrictor agent were studied: 0.2 mg of epinephrine, 0.3 mg of epinephrine, 1 mg of phenylephri...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1984-02-01 00:00:00
abstract:UNLABELLED:Pain complicates the recovery process after ambulatory surgery. We surveyed 175 ambulatory surgery patients to determine pain severity, analgesic use, relationship of pain to duration of recovery, and the relative importance of various factors to predicting these outcomes. Multivariate regression analysis wa...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章
doi:10.1097/00000539-200209000-00025
更新日期:2002-09-01 00:00:00
abstract:BACKGROUND:Goal-directed fluid therapy (GDFT) is associated with improved outcomes after surgery. The esophageal Doppler monitor (EDM) is widely used, but has several limitations. The NICOM, a completely noninvasive cardiac output monitor (Cheetah Medical), may be appropriate for guiding GDFT. No prospective studies ha...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000000182
更新日期:2014-05-01 00:00:00