Abstract:
BACKGROUND:Pressure measuring systems using fluid-filled catheters can result in the recording of distorted pressure waveforms. It results in phase delay, overestimation of systolic and, to a lesser extent, of diastolic pressure. We designed and evaluated a method to correct this pressure waveform distortion using an appropriate transfer equation obtained from the dynamic response of the fluid-filled catheter. This transfer equation is based on the principle that a fluid-filled catheter recording system is considered as an underdamped dynamic system fully characterized by its natural frequency (omega n) and damping ratio (zeta). METHODS:Pressure waveforms, simultaneously recorded in vitro or in vivo by a fluid-filled catheter (Pc) and a micromanometer-tipped catheter (Pref), were used to validate the method. Dynamic response of the catheter used was obtained from a fastflush test. The corrected signal (Ppred) was obtained using omega n, zeta and the following transfer equation: d2Pc/dt2 + 2 omega n zeta dPc/dt + omega n 2Pc = C Ppred (t) After correction of Pc, Ppred was compared, using a linear regression, with Pref taken as reference. RESULTS:Our results showed that Ppred was fitted to Pref with excellent coefficient correlation (0.99). The mean error and the standard error of estimate were respectively -1.16 mmHg and 1.4 mmHg. CONCLUSION:This new method can convert the distorted pressure waveforms transmitted by any fluid-filled catheters into high-fidelity signals. It suppresses the phase delay and the over-estimation of systolic pressure induced by fluid-filled catheters.
journal_name
Acta Anaesthesiol Scandjournal_title
Acta anaesthesiologica Scandinavicaauthors
Lambermont B,Gerard P,Detry O,Kolh P,Potty P,D'orio V,Marcelle Rdoi
10.1111/j.1399-6576.1998.tb05307.xsubject
Has Abstractpub_date
1998-07-01 00:00:00pages
717-20issue
6eissn
0001-5172issn
1399-6576journal_volume
42pub_type
杂志文章abstract:BACKGROUND:The transillumination of the soft tissues of the neck using lighted stylets has been used as an aid for tracheal intubation. We evaluated the efficacy and safety of a prototype illuminated flexible catheter to facilitate light-guided intubation through the intubating laryngeal mask. METHODS:The illuminated ...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 临床试验,杂志文章
doi:10.1034/j.1399-6576.2000.440818.x
更新日期:2000-09-01 00:00:00
abstract::This historically prospective study analysed hospital costs and long-term outcome in 249 consecutive patients who required intensive care including intermittent positive pressure ventilation (IPPV) for 48 h or more. The mean age of the patients was 46.7 years and the mean duration on IPPV was 9.1 days. Mortality in ho...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.1399-6576.1987.tb02647.x
更新日期:1987-11-01 00:00:00
abstract:BACKGROUND:Hydroxyethyl starches (HES) have been shown to decrease clot strength and to increase coagulation times assessed by thromboelastography (TEG). HES with minimal anticoagulant side-effects is beneficial for plasma volume expansion in the perioperative setting. A comparison of the in vivo effects of high, middl...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1034/j.1399-6576.2003.470112.x
更新日期:2003-01-01 00:00:00
abstract:BACKGROUND:Some experimental and retrospective clinical studies signal an association between certain anaesthetic techniques and tumour metastasis following breast cancer surgery. Neutrophil Extracellular Trapping (NETosis) is an immunological process, whereby neutrophils engulf tumour antigen then degranulate, leaving...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
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abstract::In a controlled study a single segment combined spinal epidural (CSE) block was compared with epidural block for cesarean section. Thirty healthy parturients were randomly divided into two groups. In both groups a T4 block was aimed at. Bupivacaine was used to provide analgesia in both groups. All patients receiving C...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1399-6576.1988.tb02689.x
更新日期:1988-01-01 00:00:00
abstract::We report a case of massive gastric distension presenting with abdominal pain, shock and lower limb ischaemia. At laparotomy, gastric distension was found to be secondary to gastric outflow obstruction compounded by gas formation from antacid ingestion. Both the aorta and inferior vena cava were directly compressed by...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.1399-6576.2004.00552.x
更新日期:2005-01-01 00:00:00
abstract::The effect of isoflurane administration on diaphragmatic activity was investigated in six anaesthetized mechanically ventilated dogs. Diaphragmatic strength was assessed by measuring the transdiaphragmatic pressure (Pdi) generated during supramaximal stimulation of both cervical phrenic nerves at frequencies of 0.5, 1...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.1399-6576.1993.tb03710.x
更新日期:1993-04-01 00:00:00
abstract::Although diagnostic imaging is now highly developed, neural blockade provides another opportunity to test for a source of pain that may frequently leave no signature. Likewise, many neuropathic pains can not be tested by neurodiagnostic methods. This paper makes a case for the continued use of regional anesthesia to a...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章,评审
doi:10.1034/j.1399-6576.2001.450909.x
更新日期:2001-10-01 00:00:00
abstract:BACKGROUND:Femoral and sciatic nerve block may not provide complete post-operative analgesia following total knee replacement. This study was designed to evaluate whether the addition of an obturator nerve block to combined femoral and sciatic nerve block improves the quality of post-operative analgesia following prima...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2002-01-01 00:00:00
abstract::We report an accidental injection of epinephrine before spinal anaesthesia in a 20-year-old patient who subsequently developed immediate myocardial ischemia and global left ventricular dysfunction (ejection fraction of 20%). Hemodynamic status dramatically improved after nitroglycerin, calcium antagonists, acetyl sali...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
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更新日期:2004-08-01 00:00:00
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journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/aas.12755
更新日期:2016-09-01 00:00:00
abstract:BACKGROUND:Medical emergency team (MET) activation criteria serve as a predictor of serious adverse events on hospital wards and in the emergency department (ED). We aimed to determine whether in-hospital MET activation criteria would be useful in identifying patients at risk in pre-hospital care. METHODS:The data wer...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/aas.12499
更新日期:2015-04-01 00:00:00
abstract:BACKGROUND:Postoperative cognitive dysfunction (POCD) is a common complication after cardiac and major non-cardiac surgery with general anaesthesia in the elderly. We hypothesized that the incidence of POCD would be less with regional anaesthesia rather than general. METHODS:We included patients aged over 60 years und...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
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更新日期:2003-03-01 00:00:00
abstract:BACKGROUND AND PURPOSE:It is essential to diagnose ischaemic stroke as soon as possible after symptom onset, so that thrombolytic treatment can be initiated as quickly as possible. This might be greatly facilitated if cerebral CT could be carried out in a pre-hospital setting. The aim of this study was to evaluate if a...
journal_title:Acta anaesthesiologica Scandinavica
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更新日期:2015-10-01 00:00:00
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journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.1399-6576.2010.02316.x
更新日期:2011-01-01 00:00:00
abstract:BACKGROUND:Gas exchange is regularly impaired during general anaesthesia with mechanical ventilation. A major cause of this disorder appears to be atelectasis and consequently pulmonary shunt. After re-expansion, atelectasis reappears very slowly if 30% oxygen in nitrogen is used, but much faster if 100% oxygen is used...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1399-6576.1996.tb04483.x
更新日期:1996-05-01 00:00:00
abstract:BACKGROUND:Trauma systems have improved outcomes for injured patients, but might be challenging to implement. We assessed the implementation of a trauma system in Norway after recommendations for a national trauma system were published in 2007, with a focus on elements in acute care hospitals. METHODS:All hospitals in...
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pub_type: 杂志文章
doi:10.1111/aas.12467
更新日期:2015-03-01 00:00:00
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journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.1399-6576.1977.tb01218.x
更新日期:1977-01-01 00:00:00
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journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.1399-6576.1982.tb01825.x
更新日期:1982-12-01 00:00:00
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journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.1399-6576.1993.tb03737.x
更新日期:1993-05-01 00:00:00
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journal_title:Acta anaesthesiologica Scandinavica
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1990-08-01 00:00:00
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journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
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更新日期:2008-05-01 00:00:00
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journal_title:Acta anaesthesiologica Scandinavica
pub_type: 评论,杂志文章
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更新日期:2016-08-01 00:00:00
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journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/aas.12910
更新日期:2017-08-01 00:00:00
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pub_type: 指南,杂志文章,实务指引,评审
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更新日期:2005-09-01 00:00:00
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journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.1399-6576.1983.tb01982.x
更新日期:1983-12-01 00:00:00
abstract::The aim of this study was to compare propofol produced EEG burst suppression with isoflurane produced burst suppression in rabbits and to see whether rabbits can serve as models in studying the effects of different anaesthetics on human EEG. We recorded EEG of eight rabbits anaesthetised with isoflurane and propofol. ...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.1399-6576.1995.tb04176.x
更新日期:1995-08-01 00:00:00
abstract:BACKGROUND:It has been speculated that epidural anaesthesia may induce bronchoconstriction via the mechanism of a sympathetic blockade. However, this hypothesis has not been confirmed by any experimental evidence. Therefore, we investigated the effects of high thoracic epidural anaesthesia with neural sympathetic block...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.1399-6576.1998.tb05085.x
更新日期:1998-01-01 00:00:00
abstract:BACKGROUND:In previous studies on glucocorticoids for postoperative pain, the test drug has been given perioperatively, usually before measurement of baseline pain. In order to evaluate the time course and magnitude of the analgesic effect of a glucocorticoid in well-established postoperative pain, we compared methylpr...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2004-11-01 00:00:00
abstract:BACKGROUND:To evaluate the effect of a recruitment maneuver (RM) with constant positive inspiratory pressure and high positive end-expiratory pressure (PEEP) on oxygenation and static compliance (Cs) in patients with severe acute respiratory distress syndrome (ARDS). METHODS:Eight patients with ARDS ventilated with lu...
journal_title:Acta anaesthesiologica Scandinavica
pub_type: 杂志文章
doi:10.1111/j.0001-5172.2004.0305.x
更新日期:2004-03-01 00:00:00