Abstract：
:The quantity of blood arriving at the left side of the heart oscillates throughout the breathing cycle due to the mechanics of breathing. Neurally regulated fluctuations in the length of the heart period act to dampen oscillations of the left ventricular stroke volume entering the aorta. We have reported that stroke volume oscillations but not spectral frequency variability stroke volume measures can be used to estimate the breathing frequency. This study investigated with the same recordings whether heart period oscillations or spectral heart rate variability measures could function as estimators of breathing frequency. Continuous 270 s cardiovascular recordings were obtained from 22 healthy adult volunteers in the supine and upright postures. Breathing was recorded simultaneously. Breathing frequency and heart period oscillation frequency were calculated manually, while heart rate variability spectral maximums were obtained using heart rate variability software. These estimates were compared to the breathing frequency using the Bland-Altman agreement procedure. Estimates were required to be < ±10% (95% levels of agreement). The 95% levels of agreement measures for the heart period oscillation frequency (supine: -27.7 to 52.0%, upright: -37.8 to 45.9%) and the heart rate variability spectral maximum estimates (supine: -48.7 to 26.5% and -56.4 to 62.7%, upright: -37.8 to 39.3%) exceeded 10%. Multiple heart period oscillations were observed to occur during breathing cycles. Both respiratory and non-respiratory sinus arrhythmia was observed amongst healthy adults. This observation at least partly explains why heart period parameters and heart rate variability parameters are not reliable estimators of breathing frequency. In determining the validity of spectral heart rate variability measurements we suggest that it is the position of the spectral peaks and not the breathing frequency that should be the basis of decision making.
journal_name
J Clin Monit Computjournal_title
Journal of clinical monitoring and computingauthors
McMullen MK,Whitehouse JM,Shine G,Towell Adoi
10.1007/s10877-011-9327-8subject
Has Abstractpub_date
2012-02-01 00:00:00pages
21-8issue
1eissn
1387-1307issn
1573-2614journal_volume
26pub_type
杂志文章abstract：:We aimed at identifying a model that dynamically predicts future need for renal replacement therapy (RRT) in intensive care unit (ICU) patients and can easily be implemented for online monitoring at the bedside. 7290 interdisciplinary ICU admissions were investigated. Patients with <3 days of stay or RRT in the first ...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-015-9814-4
更新日期：2017-02-01 00:00:00
abstract：:While the effects of phenylephrine (PE) and ephedrine (E) on cerebral oxygen saturation (rScO2) already has been studied, the effect on paraspinal oxygen saturation (rSpsO2) is still unexplored. This study aims to assess the effect of PE and E on rScO2 and rSpsO2, measured with near-infrared spectroscopy. A randomized...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-019-00328-6
更新日期：2020-04-01 00:00:00
abstract：OBJECTIVE:To evaluate a computerized system for mechanical ventilation of infants. METHODS:FLEX is a computerized system that includes the features of a patented mode known as adaptive-support ventilation (ASV). In addition, it has many other features including adjustment of positive end-expiratory pressure (PEEP), fr...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-009-9170-3
更新日期：2009-04-01 00:00:00
abstract：:FloTrac/Vigileo™ system is based on arterial pressure waveform analysis arterial pressure-based CO (APCO). Therefore, systemic vascular resistance (SVR) can influence the accuracy of APCO. The purpose of this study is to evaluate the relationship between SVR and the accuracy of APCO. We managed 50 consecutive patients...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-013-9481-2
更新日期：2013-12-01 00:00:00
abstract：OBJECTIVE:In mechanical ventilation, the assessment of pulmonary mechanics, mainly of total compliance (Crs), total resistance (Rrs), and intrinsic positive end-expiratory pressure (PEEPint), is clinically important. By using airway pressure (Paw) and flow (V'aw), the least squares fit (LSF) method allows the continuou...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1023/a:1007457829405
更新日期：1998-02-01 00:00:00
abstract：:In this paper is presented a brief state of art regarding the multivariable formulation for controlling the depth of anaesthesia by means of two intravenously administrated drugs, i.e. propofol and remifentanil. In a feasibility study of determining a suitable variable to quantify analgesia levels in patients undergoi...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-013-9535-5
更新日期：2014-12-01 00:00:00
abstract：:The utility of capnography to detect early respiratory compromise in surgical patients after anesthesia is unclear due to limited prospective data. The purpose of this trial was to determine the frequency and duration of capnography-detected respiratory adverse events in the post-anesthesia care unit (PACU). In this p...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-019-00333-9
更新日期：2020-06-01 00:00:00
abstract：OBJECTIVES:This study was conducted to determine the response time of the Opti-Q continuous cardiac output (CCO) device to a step change in cardiac. DESIGN:Prospective study. SETTING:University hospital animal lab. MODEL:Female sheep. INTERVENTIONS:In ten animals, cardiac output was altered suddenly by opening and ...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1023/a:1009934112134
更新日期：1999-12-01 00:00:00
abstract：OBJECTIVE:To define the longest sampling interval which will faithfully record the time course of episodes of severe hypotension and hypoxia in anesthetised patients. METHODS:Electronic anesthetic records of 1501 patients were analyzed retrospectively for hypotension where measured systolic blood pressure fell to 60 m...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1023/a:1009978414365
更新日期：1998-07-01 00:00:00
abstract：:Cigarette smoking is often associated with the development of several respiratory diseases however, if diagnosed early, the changes in the lung tissue caused by smoking may be reversible. Computerised respiratory sounds have shown to be sensitive to detect changes within the lung tissue before any other measure, howev...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-016-9887-8
更新日期：2017-06-01 00:00:00
abstract：OBJECTIVE:To determine if an automatic algorithm using wavelet analysis techniques can be used to reliably determine respiratory rate from the photoplethysmogram (PPG). METHODS:Photoplethysmograms were obtained from 12 spontaneously breathing healthy adult volunteers. Three related wavelet transforms were automaticall...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-005-9007-7
更新日期：2006-02-01 00:00:00
abstract：INTRODUCTION:Effectively monitoring the level of consciousness during general anesthesia is clinically beneficial to both the patient and the physician. An electroencephalogram (EEG)-based level-of-consciousness monitor can help minimize intraoperative awareness as well as the effects of over-sedation. In this study, w...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-010-9246-0
更新日期：2010-08-01 00:00:00
abstract：:Aortic peak systolic velocity variation (ΔVpeakAo) is a reliable dynamic indicator of preload in mechanically ventilated children. However, easily measurable alternative parameters like carotid peak systolic velocity variation (ΔVpeakCa) and suprasternal peak systolic velocity variation (ΔVpeakSs) are not well evaluat...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-019-00431-8
更新日期：2020-12-01 00:00:00
abstract：OBJECTIVE:Various studies worldwide have found that sound levels in hospitals significantly exceed the World Health Organization (WHO) guidelines, and that this noise is associated with audible signals from various medical devices. The pulse oximeter is now widely used in health care; however the health effects associa...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-008-9125-0
更新日期：2008-06-01 00:00:00
abstract：:In mechanical ventilation, a careful setting of the ventilation parameters in accordance with the current individual state of the lung is crucial to minimize ventilator induced lung injury. Positive end-expiratory pressure (PEEP) has to be set to prevent collapse of the alveoli, however at the same time overdistension...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章,多中心研究
doi：10.1007/s10877-014-9562-x
更新日期：2014-12-01 00:00:00
abstract：:The test of the inner tube integrity is an important checklist prior to the safe use of Bain's breathing system. This is because the major concern with the use of Bain's circuit is the potential malfunctioning of the circuit due to avulsion of the inner fresh gas delivery tube at the machine end which will turn the ou...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-009-9212-x
更新日期：2010-02-01 00:00:00
abstract：:This study aimed to evaluate the 50% and 95% effective paratracheal forces for occluding the esophagus in anesthetized patients. In 46 anesthetized patients, the upper esophagus was examined using ultrasonography, and the lower paratracheal area over the esophagus just above the clavicle was marked. Manual paratrachea...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-021-00652-w
更新日期：2021-01-26 00:00:00
abstract：BACKGROUND AND OBJECTIVE:Ventricular late potentials (LP) recording with signal-averaged electrocar- diogram allow identifying patients at risk of sudden death and ventricular tachycardia. Cardiac surgery with cardiopulmonary bypass (CPB) could predispose to the development of myocardial ischemia related to imperfect c...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-011-9305-1
更新日期：2011-08-01 00:00:00
abstract：:The capnodynamic method is a minimally invasive method continuously calculating effective pulmonary blood flow (COEPBF), equivalent to cardiac output when intra pulmonary shunt flow is low. The capnodynamic equation joined with a ventilator pattern containing cyclic reoccurring expiratory holds, provides breath to bre...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-017-0021-3
更新日期：2018-04-01 00:00:00
abstract：OBJECTIVE:To determine whether a simple transcanial Doppler waveform variable-pulsatility difference (systolic - diastolic blood flow velocity) can serve as a measure of critical changes in cerebral perfusion. METHODS:Thirteen pigs were anesthetized (anesthesia maintained with halothane) and ventilated to maintain nor...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1023/a:1009993232534
更新日期：1999-05-01 00:00:00
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journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章,评审
doi：10.1007/s10877-020-00504-z
更新日期：2020-06-01 00:00:00
abstract：:To compare the newborn infant parasympathetic evaluation system (NIPE) scores with a validated clinical scale using two different nebulizers in children with bronchiolitis admitted to a PICU. Comfort was evaluated using the COMFORT-behavior scale (CBS) before (T1), during (T2) and after (T3) each nebulization. In orde...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章,随机对照试验
doi：10.1007/s10877-019-00268-1
更新日期：2019-10-01 00:00:00
abstract：:Microvascular function may be modulated by various anesthetics. Desflurane and propofol anesthesia have different effects on microvascular function. However, there are few reports on the effects of sevoflurane and desflurane on microvascular function during cardiac surgery. We compared the effects of sevoflurane and d...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-020-00587-8
更新日期：2020-09-11 00:00:00
abstract：:Electrical impedance tomography (EIT) is used in lung physiology monitoring. There is evidence that EIT is linearly associated with global tidal volume (VT) in clinically healthy patients where no positive end-expiratory pressure (PEEP) is applied. This linearity has not been challenged by altering lung conditions. Th...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-021-00651-x
更新日期：2021-01-25 00:00:00
abstract：:Oesophageal balloon calibration improves the oesophageal pressure (Pes) assessment during invasive controlled mechanical ventilation. The primary aim of the present investigation was to ascertain the feasibility of oesophageal balloon calibration during pressure support ventilation (PSV). Secondarily, the calibrated P...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-019-00436-3
更新日期：2020-12-01 00:00:00
abstract：OBJECTIVES:The application of sighs during baseline ventilation was found to improve alveolar recruitment and oxygenation in patients with acute respiratory distress syndrome (ARDS). The present investigation evaluates if respiratory mechanics can be modified by a sigh. METHODS:Ten consecutive patients with acute lung...
journal_title：Journal of clinical monitoring and computing
pub_type： 临床试验,杂志文章
doi：10.1007/s10877-006-9028-x
更新日期：2006-08-01 00:00:00
abstract：:The mesenteric traction syndrome (MTS) is associated with prostacyclin (PGI2) facilitated systemic vasodilatation during surgery and is identified by facial flushing. We hypothesized that severe facial flushing would be related to the highest concentrations of plasma PGI2 and accordingly to the highest levels of skin ...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-018-0226-0
更新日期：2019-10-01 00:00:00
abstract：:Monitors evaluating the electroencephalogram (EEG) to determine depth of anaesthesia use spectral analysis approaches for analysis windows up to 61.5 s as well as additional smoothing algorithms. Stationary EEG is required to reliably apply the index algorithms. Because of rapid physiological changes, artefacts, etc.,...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章,随机对照试验
doi：10.1007/s10877-014-9553-y
更新日期：2014-12-01 00:00:00
abstract：OBJECTIVE:Describe reproducibility of a measurement method to investigate deficits in eye-head co-ordination. METHODS:Combined recordings of head and eye rotation using wireless motion sensors and electro-oculography (EOG) were used as an initial step towards a method to quantify eye-head co-ordination deficits. Head ...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1007/s10877-009-9160-5
更新日期：2009-02-01 00:00:00
abstract：:Recent advances in technology have brought many kinds of monitoring devices into the operating room (OR). The information gathered by monitors can be channeled to the operating ward information system via a local area network (LAN). Connecting patients to monitors and monitors to the LAN, however, requires a large num...
journal_title：Journal of clinical monitoring and computing
pub_type： 杂志文章
doi：10.1023/a:1009911208828
更新日期：2000-01-01 00:00:00
