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Results 101 - 150 of 1769
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Tuzcu Kasim - - 2013
This study aimed to compare the effects of remifentanil and esmolol on the elevation of intraocular pressure (IOP) and hemodynamic response. After approval of the institutional Ethics Committee and obtaining informed consent, 60 adult patients with American Society of Anesthesiologists I-II status undergoing elective, nonophthalmic surgery were included in the ...
Sundberg Johan - - 2013
Acoustic and aerodynamic properties of the voice source and vocal tract have been extensively analyzed during the last half century. Corresponding investigations of the subglottal system are rare but can be assumed to be relevant to voice production. In the present exploratory study, subglottal pressure was recorded in a male ...
Arslan Ilker Burak - - 2013
ObjectiveThis study was designed to evaluate the effectiveness of topical lidocaine in attenuating the laryngeal reflex and blunting hemodynamic response by inhibition of the superior laryngeal nerve in laryngeal microsurgery, which would be helpful in preventing potential complications.Study DesignA prospective, randomized, double-blind study.SettingTertiary medical center.Subjects and MethodsFifty-four patients requiring glottic ...
Phillips Justin P - - 2013
Photoplethysmographic (PPG) signals were recorded from the fingers of 16 healthy volunteers with periods of timed and forced respiration. The aim of this pilot study was to compare estimations of arterial oxygen saturation (SpO2) recorded using a dedicated pulse oximetry system while subjects were breathing regularly with and without a ...
Dow Douglas E - - 2013
Reliable information from patient monitors enhances treatment for critically ill patients. Redundant sources for information would aid identification of faulty sensors and leads, and improve presentation of physiological data. Respiratory information can be obtained from several sources, including airway pressure and central venous pressure (CVP). CVP signals have been analyzed ...
Kaczka David W - - 2013
Lung inflation has been shown to dilate airways by altering the mechanical equilibrium between opposing airway and parenchymal forces. However, it is not known how heterogeneously such dilation occurs throughout the airway tree. In six anesthetized dogs, we measured the diameters of five to six central airway segments using high ...
Carteaux Guillaume - - 2013
During proportional assist ventilation with load-adjustable gain factors, peak respiratory muscle pressure can be estimated from the peak airway pressure and the percentage of assistance (gain). Adjusting the gain can, therefore, target a given level of respiratory effort. This study assessed the clinical feasibility of titrating proportional assist ventilation with ...
Chanques Gerald - - 2013
OBJECTIVES:: Breath-stacking asynchrony during assist-control-mode ventilation may be associated with increased tidal volume and alveolar pressure that could contribute to ventilator-induced lung injury. Methods to reduce breath stacking have not been well studied. The objective of this investigation was to evaluate 1) which interventions were used by managing clinicians to ...
Massery Mary - - 2013
Maintenance of upright posture involves complex neuromotor processes that include control of thoracic and abdominal pressures. Control of airflow by glottal structures is a primary determinant of thoracic pressure and may have a role in control of postural stability. This study aimed to investigate the effect of modulation of airway ...
Hawkes G A - - 2013
Assessment of effective ventilation in neonatal mask ventilation can be difficult. This study aims to determine whether manual ventilation with a T-piece resuscitator containing an inline CO2 detector (either a Pedi-Cap® CO2 detector or a Neo-StatCO2 <Kg® CO2 detector connected to a facemask) facilitates effective positive pressure ventilation compared to no ...
Fleck Robert J - - 2013
IMPORTANCE Positive pressure air is used during basic life support to provide respirations and applied as continuous positive airway pressure to maintain a patent airway during sleep or anesthesia. These functions are more critical in children with obstructive sleep apnea, who often have smaller airway dimensions and increased airway collapsibility. ...
Thakur Nikhil A - - 2013
Airway obstruction by wound hematoma is a serious adverse event associated with anterior cervical spine surgery. Although intrinsic airway edema is the most plausible pathophysiologic mechanism of obstruction, we hypothesized that extrinsic compression of the trachea by a hematoma can result in airway occlusion at an angle to the sagittal ...
Cortes-Puentes Gustavo A - - 2013
Intra-abdominal hypertension (IAH) and abdominal compartment syndrome (ACS) may complicate monitoring of pulmonary mechanics owing to their impact on the respiratory system. However, recommendations for mechanical ventilation of patients with IAH/ACS and the interpretation of thoracoabdominal interactions remain unclear. Our study aimed to characterize the influence of elevated intra-abdominal pressure ...
Saikia Bhaskar - - 2013
Airway malacia is uncommon condition having symptoms similar to common respiratory illnesses. Any child having persistent wheeze during infancy should be evaluated for airway malacia. The authors report a case of isolated severe bilateral bronchomalacia managed with tracheostomy and continuous positive pressure ventilation.
Hwang J Y - - 2013
BACKGROUND: /st>Current tracheal tubes (TTs) cannot guarantee a perfect seal against pulmonary aspiration of upper airway secretions. The purpose of this study was to investigate whether a gel layer between the tracheal tube with double cuffs (Double cuffs) prevents fluid leakage past TT cuffs. METHODS: /st>In vitro fluid leakage tests ...
Kim Yong Beom - - 2013
PURPOSE: This prospective, randomized trial was designed to assess whether the i-gel supraglottic airway device is suitable for volume-controlled ventilation while applying positive end-expiratory pressure (PEEP) of 5 cmH2O under general anesthesia. It was believed that this device might improve arterial oxygenation. METHODS: Forty adult patients (aged 20-60 years) scheduled for elective ...
Sittitavornwong Somsak - - 2013
PURPOSE: This study evaluated the soft tissue change of the upper airway after maxillomandibular advancement (MMA) using computational fluid dynamics. MATERIALS AND METHODS: Eight patients with obstructive sleep apnea syndrome who required MMA were recruited into this study. All participants underwent pre- and postoperative computed tomography and then MMA by ...
Choi Ji Ho - - 2013
The aims of the present study were twofold. We sought to compare two methods of titrating the level of continuous positive airway pressure (CPAP) - auto-adjusting titration and titration using a predictive equation - with full-night manual titration used as the benchmark. We also investigated the reliability of the two ...
Rafiei Mohammad Reza - - 2013
Increased intra-abdominal pressure (IAP) results in dysfunction of vital organs. The aim of the present study was to evaluate the effect of mechanical ventilation mode on IAP. In a cohort study, a total of 60 patients aged 20-70 years who were admitted to the ICU and underwent mechanical ventilation were ...
Taghavi Sharven - - 2013
Prehospital intubation does not result in a survival advantage in patients experiencing penetrating trauma, yet resistance to immediate transportation to facilitate access to definitive care remains. An animal model was developed to determine whether intubation provides a survival advantage during severe hemorrhagic shock. We hypothesized that intubation would not provide ...
Garguilo Marine M University of Versailles Saint-Quentin-en-Yvelines, Versailles, - - 2013
Communication is a major issue for patients with tracheostomy who are supported by mechanical ventilation. The use of positive end-expiratory pressure (PEEP) may restore speech during expiration; however, the optimal PEEP level for speech may vary individually. We aimed to improve speech quality with an individually adjusted PEEP level delivered ...
Hopper Kate - - 2013
Respiratory failure may occur due to hypoventilation or hypoxemia. Regardless of the cause, emergent anesthesia and intubation, accompanied by positive pressure ventilation, may be necessary and life saving. Long-term mechanical ventilation requires some specialized equipment and knowledge; however, short-term ventilation can be accomplished without the use of an intensive care ...
Greising Sarah M SM Department of Physiology and Biomedical Engineering, Mayo Clinic, College of Medicine, 200 First Street SW, Rochester, MN 55905, - - 2013
The diaphragm muscle (DIAm) is responsible for breathing and determines the ability to generate both ventilatory and non-ventilatory behaviors. Size limitations of the mouse make transdiaphragmatic pressure (Pdi) measurement using a dual balloon system untenable. Adult C57BL/6J mice (n=8) and C57BL/6×129 (n=9), underwent Pdi measurements using solid-state pressure catheters spanning ...
Clavieras Noémie - - 2013
BACKGROUND:: Intellivent is a new full closed-loop controlled ventilation that automatically adjusts both ventilation and oxygenation parameters. The authors compared gas exchange and breathing pattern variability of Intellivent and pressure support ventilation (PSV). METHODS:: In a prospective, randomized, single-blind design crossover study, 14 patients were ventilated during the weaning phase, ...
Xie Ailiang - - 2013
To determine how the OSA patient's pathophysiologic traits predict the success of the treatment aimed at stabilization or increase in respiratory motor outputs, we studied 26 patients with OSA (AHI 42±5 events/hour with 92% of apnea were obstructive), who were treated with O2 supplementation, an isocapnic rebreathing system in which ...
Pedrosa Rodrigo P - - 2013
ABSTRACT BACKGROUND: Obstructive sleep apnea is extremely common among patients with resistant hypertension. However, the impact of the treatment of obstructive sleep apnea with continuous positive airway pressure on blood pressure in patients with resistant hypertension is not well established. METHODS: In the present study, 40 patients with confirmed resistant ...
Muller Matthew D - - 2013
Tactile stimulation of the oropharynx (TSO) elicits the gag reflex and increases heart rate (HR) and mean arterial pressure (MAP) in anesthetized patients. However, the interaction between upper airway defense reflexes and the sympathetic nervous system has not been investigated in conscious humans. In Experiment 1, beat-by-beat measurements of HR, ...
Hester Doug - - 2013
Prolonged time during endotracheal tube placement has been associated with poor outcomes, including cardiac arrest and death. For this reason, the accurate measurement of the duration of intubation time is an important metric in studies that evaluate interventions to improve airway outcomes. In the current study we correlated the gaps ...
Al Jaaly Emad E Cardiothoracic Surgery, Hammersmith Hospital, Imperial College NHS Trust, London, United - - 2013
We compared the efficacy of noninvasive ventilation with bilevel positive airway pressure added to usual care versus usual care alone in patients undergoing coronary artery bypass grafting. We performed a 2-group, parallel, randomized controlled trial. The primary outcome was time until fit for discharge. Secondary outcomes were partial pressure of carbon ...
Baba Atsushi - - 2013
OBJECTIVE: The purpose of this study was to show the effects of the tra gas insufflation (TGI) technique on gas exchange using helium-oxygen mixtures during high-frequency oscillatory ventilation (HFOV). We hypothesized that a helium-oxygen mixture delivered into the trachea using the TGI technique (0.3 L/min) would enhance gas exchange during ...
Pichot C C Department of Physiology, University of Lyon, EA 4612: Neurocardiology, Lyon, - - 2013
Acute respiratory distress syndrome (ARDS) is associated with a high mortality linked primarily to co-morbidities (sepsis, cardiac failure, multiple organ failure, etc.). When the lung is the single failing organ, quick resolution of ARDS should skip some complications arising from a prolonged stay in the critical care unit. In severe ...
Osborn Alexander J - - 2013
OBJECTIVES/HYPOTHESIS: To test whether a simple inexpensive device that dynamically minimizes endotracheal cuff pressure throughout the respiratory cycle reduces endotracheal cuff pressure-related subglottic injury. STUDY DESIGN: Hypoxic animal model with one control and one experimental group. METHODS: Twelve S. scrofa domesticus piglets (14-16kg) were intubated with standard endotracheal tubes and ...
Jiang Nancy - - 2013
OBJECTIVES/HYPOTHESIS: The purpose of this study was to evaluate the efficacy of a novel teaching tool to improve health care providers' ability to inflate tracheostomy tube cuffs to the appropriate pressure. STUDY DESIGN: Single-blinded, randomized, controlled trial. METHODS: Subjects were randomized to a control and study group. The control group ...
Hata Yoshinobu - - 2013
While transbronchoscopic air insufflation has been described in refractory atelectasis as a therapy without any serious complications, 3 cases of gastric rupture during the same procedure have been reported when it was used to support tracheal intubation by employing the jet of oxygen from the wall pipeline. Here, we report ...
Tiefenthaler W - - 2013
We investigated the hypothesis that the oropharyngeal leak pressure would differ between the GuardianCPV™ and the LMA Supreme™ in anaesthetised patients. We randomly assigned 120 patients to receive either the GuardianCPV or the LMA Supreme for airway management. Oropharyngeal leak pressure was measured during cuff inflation from 0 to 40 ml ...
Lee Heeseung - - 2013
The Pentax Airway Scope (AWS) is a video laryngoscope designed to facilitate tracheal intubation with a high-resolution image. The Pentax AWS has been reported to cause less hemodynamic stress than the Macintosh laryngoscope. The aims of this study are to investigate the differences in hemodynamic responses and norepinephrine concentrations to ...
Dąbrowska-Wójciak Iwona - - 2013
Positive end-expiratory pressure (PEEP) is used during non-invasive and invasive ventilation of newborns, infants and children. PEEP improves gas exchange by increasing the functional residual capacity, reduces the respiratory effort, lowers requirements for respiratory mixture oxygen, and enables to decrease the peak inspiratory pressure (PIP) without decreasing the mean airway ...
Haidry Mehtab A - - 2013
Use of McCoy blade laryngoscope avoids the lifting force in the vallecula and theoretically should lead to a lower hemodynamic response related to laryngoscopy and tracheal intubation. The available literature on the topic is conflicting. We studied the hemodynamic response to laryngoscopy and tracheal intubation in 60 ASA 1 AND ...
Callahan Cynthia Y - - 2013
The authors examined magnitude/variability of residual sleep disordered breathing (SDB) at pressures around the therapeutic continuous positive airway pressure (CPAP), and described a multinight approach to CPAP titration/retitration consisting of recording airflow and summarizing SDB over multiple nights at multiple pressures and choosing an optimal pressure from these summarized data. ...
Moein Vaziri Mohammad Taghy - - 2013
Hemodynamic changes and respiratory tract complications are often followed by tracheal extubation. These events may be dangerous in neurosurgical patients and those with cardiovascular disease or at an old age. The aim of this study is to investigate the attenuation of cardiovascular responses and upper airway events resulting from tracheal ...
Jagannathan Narasimhan - - 2013
BACKGROUND: The cuff pressure for optimal airway sealing with first-generation laryngeal mask airway has been shown to be 40 cm H2 O in children. Currently, there are no data regarding the ideal intracuff pressure for the laryngeal mask airway Supreme (Supreme) in children. OBJECTIVES: To compare the clinical performance of the ...
Lovas A A Department of Anaesthesiology and Intensive Therapy, Faculty of Medicine, University of Szeged, Szeged 6722, Hungary. - - 2013
T-piece has been widely used as T-piece trial to identify patients who are ready for extubation but it is seldom used as a weaning tool. Our objective was to investigate the effects of breathing via T-piece on gas exchange as compared to continuous positive airway pressure with pressure support (CPAP+PS) ...
Youngquist Tiffany M - - 2013
BackgroundBubble continuous positive airway pressure (B-CPAP) is frequently used in spontaneously breathing infants with lung disease. Often, the B-CPAP systems lack pressure alarms and pressure release valves. We observed a large volume of condensate in the exhalation limb of a patient circuit and conducted a series of experiments to test ...
Bellani Giacomo - - 2013
OBJECTIVES:: To calculate an index (termed Pmusc/Eadi index) relating the pressure generated by the respiratory muscles (Pmusc) to the electrical activity of the diaphragm (Eadi), during assisted mechanical ventilation and to assess if the Pmusc/Eadi index is affected by the type and level of ventilator assistance. The Pmusc/Eadi index was ...
Hart Danielle - - 2013
BACKGROUND: There are multiple techniques for face-mask (FM) ventilation. To our knowledge, the one-handed vs. two-handed C-E technique has been compared in children and adults, but no studies have compared the various two-handed methods. OBJECTIVE: To compare the effectiveness of mask seal using three different FM techniques on a model ...
Bernstein David B - - 2013
The current standard of care for patients suffering from acute respiratory distress syndrome (ARDS) is ventilation with a tidal volume of 6 ml/kg predicted body weight (PBW), but variability remains in the tidal volumes that are actually used. This study aims to identify patient scenarios for which there is discordance between ...
Johannes Amélie - - 2013
ABSTRACT Oxygenation during high-frequency oscillatory ventilation is secured by a high level of mean airway pressure. Our objective was to identify a pressure difference between the airway opening of the respiratory circuit and the trachea during application of different oscillatory frequencies. Six female Pietrain pigs (57.1 ± 3.6 kg) were first ...
Canha N - - 2013
This study focused on examination of ventilation rates in classrooms with two different types of ventilation systems: natural and mechanical. Carbon dioxide (CO2) measurements were conducted in primary schools of Portugal characterized by natural ventilation and compared to Finland where mechanical ventilation is the norm. The winter period was selected ...
Gaszyńska Ewelina - - 2013
Noninvasive ventilation (NIV) is a technique of mechanical ventilation which does not require invasive airway management, i.e. intubation or tracheostomy. In emergency medicine Continuous Positive Airway Pressure (CPAP) is used often. A new method of NIV is Impedance Threshold Device (ITD). Breathing through an ITD is utilized to raise blood ...
Jain Richa - - 2013
Negative pressure pulmonary oedema (NPPO) is a life threatening condition, manifested due to upper airway obstruction in a spontaneously breathing patient. Upper airway obstruction caused by classic laryngeal mask airway (cLMA) and ProSeal laryngeal mask airway (PLMA) has been reported, and NPPO has also been reported following the use of ...
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