Ventilator waveforms and the physiology of pressure support ventilation.

Abstract:

:Pressure support ventilation (PSV) is a commonly used mode. It is patient-triggered, pressure-limited, and (normally) flow-cycled. Triggering difficulty occurring during PSV is usually due to intrinsic positive end-expiratory pressure. The airway pressure generated at the initiation of inhalation is determined by the pressure support setting and the pressure rise time (pressurization rate) settings on the ventilator. The rise-time setting is clinician-adjustable on many current-generation ventilators. Flow delivery during PSV is determined by the pressure support setting, the pressure generated by the respiratory muscles, and respiratory system mechanics. The delivered tidal volume is determined by the area under the flow-time curve. Patient-ventilator dyssynchrony may occur during PSV if the flow at which the ventilator cycles to exhalation does not coincide with the termination of neural inspiration. The newer generation ventilators offer clinician-adjustable flow-termination during PSV. Ventilator waveforms may be useful to appropriately adjust the ventilator during PSV.

journal_name

Respir Care

journal_title

Respiratory care

authors

Hess DR

keywords:

subject

Has Abstract

pub_date

2005-02-01 00:00:00

pages

166-86; discussion 183-6

issue

2

eissn

0020-1324

issn

1943-3654

journal_volume

50

pub_type

杂志文章,评审
  • Effects of inspiratory rise time on triggering work load during pressure-support ventilation: a lung model study.

    abstract:BACKGROUND:The rise in inspiratory flow is important during patient-triggered ventilation. Many ventilators incorporate a function to control the time to reach the targeted airway pressure (inspiratory rise time). However, it has not been clarified how inspiratory rise time affects inspiratory work load under various v...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:

    authors: Murata S,Yokoyama K,Sakamoto Y,Yamashita K,Oto J,Imanaka H,Nishimura M

    更新日期:2010-07-01 00:00:00

  • Practical tips for working effectively with your institutional review board.

    abstract::The federal government regulates human research with a local institutional review board (IRB) at your institution. Your IRB's main responsibility is to protect the rights and welfare of human subjects recruited to participate in research. The IRB is responsible for reviewing and approving all research protocols that i...

    journal_title:Respiratory care

    pub_type: 杂志文章,评审

    doi:

    authors: Schwenzer KJ

    更新日期:2008-10-01 00:00:00

  • Is the content of textbooks on the evaluation of a patient in respiratory distress adequate?

    abstract:BACKGROUND:The ability to rapidly and precisely evaluate patients in respiratory distress is essential. Due to limited opportunities for formal instruction during training, textbooks are the main educational source to teach junior physicians how to interpret the signs of respiratory distress. The quality of the textbo...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.01112

    authors: Tulaimat A,Patel A,Shah B,Littleton SW

    更新日期:2012-03-01 00:00:00

  • Evaluation of auto-regulated inspiratory support during rebreathing and acute lung injury in pigs.

    abstract:BACKGROUND:Auto-regulated inspiratory support mode (ARIS) is an original closed-loop pressure-support system that regulates the slope ("A") and the initial level ("B") of the applied inspiratory pressure, in order to achieve an optimal minute ventilation under constrained respiratory frequency, tidal volume, and maximu...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:

    authors: Desmettre TJ,Chambrin MC,Mangalaboyi J,Pigot A,Chopin C

    更新日期:2005-08-01 00:00:00

  • Positive expiratory pressure changes aerosol distribution in patients with cystic fibrosis.

    abstract:HYPOTHESIS:We hypothesized that aerosol distribution in the lungs of patients with cystic fibrosis changes with positive expiratory pressure (PEP). METHODS:Eight patients were randomized to one of 2 conditions. On one study day, patients inhaled saline aerosol containing 99mtechnetium generated by a Pari LC Plus nebul...

    journal_title:Respiratory care

    pub_type: 杂志文章,随机对照试验

    doi:

    authors: Laube BL,Geller DE,Lin TC,Dalby RN,Diener-West M,Zeitlin PL

    更新日期:2005-11-01 00:00:00

  • Dexmedetomidine for sedation in the parturient with respiratory failure requiring noninvasive ventilation.

    abstract::Dexmedetomidine is a selective alpha-2 receptor agonist that possesses both sedative and analgesic properties, with minimal respiratory depression. We report the successful administration of dexmedetomidine on a 16-year-old primigravida woman that allowed the patient to tolerate application of bi-level positive airwa...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.01733

    authors: Duan M,Lee J,Bittner EA

    更新日期:2012-11-01 00:00:00

  • Quality assurance of the pulmonary function technologist.

    abstract::The skill and work habits of the pulmonary function technologist are central to the quality of patient testing. Pulmonary function technologists should be chosen carefully. The pulmonary function technologists must be intelligent, conscientious, and possess critical thinking skills. Studies are needed to better ident...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.01401

    authors: Haynes JM

    更新日期:2012-01-01 00:00:00

  • Practical problems with aerosol therapy in COPD.

    abstract::Inhaled aerosol drugs commonly used by patients with chronic obstructive pulmonary disease include short-acting and long-acting bronchodilators, as well as corticosteroids. These agents are available in a variety of inhaler devices, which include metered-dose inhalers (MDI), breath-actuated MDIs, nebulizers, and, curr...

    journal_title:Respiratory care

    pub_type: 杂志文章,评审

    doi:

    authors: Rau JL

    更新日期:2006-02-01 00:00:00

  • The 2017 Global Initiative for Chronic Obstructive Lung Disease Report and Practice Implications for the Respiratory Therapist.

    abstract::Since 1998, the Global Initiative for Obstructive Lung Disease (GOLD) has worked with health care professionals, medical researchers, and public health officials around the world to optimize the prevention, treatment, and management of COPD. GOLD has continually worked to ensure COPD management strategy recommendation...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.05402

    authors: Hess MW

    更新日期:2017-11-01 00:00:00

  • Current trends in neonatal and pediatric respiratory care: conference summary.

    abstract::A summary of the 2-day Journal Conference on Current Trends in Neonatal and Pediatric Respiratory Care is provided. Topics included: diagnosis and management of common respiratory disorders of infants and children such as asthma, respiratory syncytial virus bronchiolitis, and cystic fibrosis; and common pediatric resp...

    journal_title:Respiratory care

    pub_type:

    doi:

    authors: Kercsmar CM

    更新日期:2003-04-01 00:00:00

  • Longitudinal evaluation of compressor/nebulizer performance.

    abstract:BACKGROUND:Inhaled medications are the mainstay of treatment for maintenance of lung health in patients with cystic fibrosis (CF). Compressor/nebulizer units are used an average of 100-120 min/d by patients with CF. Each compressor/nebulizer has unique flow/pressure characteristics that affect particle size distributio...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.02776

    authors: Awad S,Williams DK,Berlinski A

    更新日期:2014-07-01 00:00:00

  • Staffing exercise sessions in pulmonary rehabilitation.

    abstract:INTRODUCTION:There is no published standard for the ratio of staff to patients during exercise sessions in outpatient pulmonary rehabilitation. This lack of a standard raises concern about patient safety and the ability to monitor patients adequately. OBJECTIVE:Determine a staff-to-patient ratio standard by examining ...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:

    authors: Hoberty PD,Chiu CY,Hoberty RJ

    更新日期:2001-07-01 00:00:00

  • Improving aerosol drug delivery during invasive mechanical ventilation with redesigned components.

    abstract:INTRODUCTION:Patients receiving invasive mechanical ventilation with an endotracheal tube (ETT) can often benefit from pharmaceutical aerosols; however, drug delivery through the ventilator circuit is known to be very inefficient. The objective of this study was to improve the delivery of aerosol through an invasive me...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.02782

    authors: Longest PW,Azimi M,Golshahi L,Hindle M

    更新日期:2014-05-01 00:00:00

  • Endobronchial argon plasma coagulation for treatment of Dieulafoy disease.

    abstract::Dieulafoy disease of the bronchus is a rare condition. A 28-y-old male patient with recurrent exacerbations of hemoptysis (producing up to 300 mL) over the previous 4 y was admitted to our hospital following an acute episode. A 3-mm sessile lesion covered with somewhat ulcerated smooth mucosa was detected at the dista...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.03307

    authors: Dalar L,Sökücü SN,Özdemir C,Büyükkale S,Altın S

    更新日期:2015-01-01 00:00:00

  • Calculation of physiologic dead space: comparison of ventilator volumetric capnography to measurements by metabolic analyzer and volumetric CO2 monitor.

    abstract:BACKGROUND:Calculation of physiologic dead space (dead space divided by tidal volume [VD/VT]) using the Enghoff modification of the Bohr equation requires measurement of the partial pressure of mean expired CO2 (PĒCO2) by exhaled gas collection and analysis, use of a metabolic analyzer, or use of a volumetric CO2 monit...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.02116

    authors: Siobal MS,Ong H,Valdes J,Tang J

    更新日期:2013-07-01 00:00:00

  • Nebulized albuterol delivery in a model of spontaneously breathing children with tracheostomy.

    abstract:BACKGROUND:Nebulized therapy is commonly used in spontaneously breathing tracheostomized patients, despite a lack of recommended devices and techniques. I compared albuterol dose delivered to a model of spontaneously breathing children with tracheostomy, using different nebulizers, tracheostomy tube sizes, inhalation t...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.02419

    authors: Berlinski A

    更新日期:2013-12-01 00:00:00

  • Increased Accuracy After Adjustment of Spirometry Threshold for Diagnosing COPD Based on Pre-Bronchodilator FEV1/FVC.

    abstract:BACKGROUND:COPD is a leading cause of morbidity and mortality worldwide. Spirometry is the most common lung function test for diagnosing COPD with a post-bronchodilator FEV1/FVC < 0.70 confirming the presence of the disease. However, diagnosticians appear reluctant to use bronchodilators, which have been linked to the ...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.06148

    authors: Kronborg T,Hangaard S,Cichosz SL,Hejlesen O

    更新日期:2019-01-01 00:00:00

  • Relationship between anxiety, depression, and quality of life in adult patients with cystic fibrosis.

    abstract:BACKGROUND:The impact of anxiety and depression on quality of life (QOL) in adult patients with cystic fibrosis (CF) is fully unknown. We investigated the prevalence and factors associated with anxiety and depression, including QOL, in adult CF patients. METHODS:One hundred twenty-one adult CF subjects, age ≥ 18 year...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.01328

    authors: Yohannes AM,Willgoss TG,Fatoye FA,Dip MD,Webb K

    更新日期:2012-04-01 00:00:00

  • Cost-benefit considerations in managing oxygenation failure.

    abstract::The evaluation of new therapy poses a formidable challenge in intensive care medicine. When therapy evaluation cannot be double-blinded, as in the evaluation of extracorporeal support, the problem becomes more difficult. The result of the extracorporeal clinical trial, like that of the ECMO trial in the 1970s, is a po...

    journal_title:Respiratory care

    pub_type: 杂志文章,评审

    doi:

    authors: Morris AH

    更新日期:1993-07-01 00:00:00

  • Aerosol Delivery During Continuous High Frequency Oscillation for Simulated Adults During Quiet and Distressed Spontaneous Breathing.

    abstract:BACKGROUND:Continuous high-frequency oscillation (CHFO) is a therapeutic mode for the mobilization of secretions. The Metaneb CHFO device also incorporates aerosol administration using an integrated jet nebulizer. However, the effectiveness of aerosol delivery and influential factors remain largely unreported. METHODS...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.07050

    authors: Li J,Elshafei AA,Gong L,Fink JB

    更新日期:2020-02-01 00:00:00

  • Inhaled Nitric Oxide: In Vitro Analysis of Continuous Flow Noninvasive Delivery via Nasal Cannula.

    abstract:BACKGROUND:Inhaled nitric oxide (NO) is most frequently delivered to mechanically ventilated patients in critical care, but it can also be administered noninvasively. The delivered dose and efficiency of continuous flow NO supplied through a nasal cannula has yet to be established. This study aimed to determine the inf...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.07737

    authors: Pillay K,Chen JZ,Finlay WH,Martin AR

    更新日期:2021-02-01 00:00:00

  • Distance learning and the internet in respiratory therapy education.

    abstract:BACKGROUND:The profession of respiratory therapy (RT) continues to grow both in number, due to population growth and an ever-increasing aging population, and scope of practice, due to both new and expanded roles and responsibilities in divergent areas of clinical practice. Instructional technology, including distance ...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.01197

    authors: Varekojis SM,Sergakis GG,Dunlevy CL,Foote E,Clutter J

    更新日期:2011-11-01 00:00:00

  • Comparison of usual and alternative methods to measure height in mechanically ventilated patients: potential impact on protective ventilation.

    abstract:BACKGROUND:Protective ventilation implementation requires the calculation of predicted body weight (PBW), determined by a formula based on gender and height. Consequently, height inaccuracy may be a limiting factor to correctly set tidal volumes. The objective of this study was to evaluate the accuracy of different met...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.02732

    authors: Bojmehrani A,Bergeron-Duchesne M,Bouchard C,Simard S,Bouchard PA,Vanderschuren A,L'Her E,Lellouche F

    更新日期:2014-07-01 00:00:00

  • Coexistence of bronchiectasis and rheumatoid arthritis: revisited.

    abstract::The presence of bronchiectasis (BR) in patients with rheumatoid arthritis (RA) has been recognized for many decades; nevertheless, little research has been undertaken in this area. It is important to recognize that BR coexistent with RA differs from the other types of BR. The purpose of this descriptive review was to ...

    journal_title:Respiratory care

    pub_type: 杂志文章,评审

    doi:10.4187/respcare.01857

    authors: Wilczynska MM,Condliffe AM,McKeon DJ

    更新日期:2013-04-01 00:00:00

  • Interleukin 27 could be useful in the diagnosis of tuberculous pleural effusions.

    abstract:BACKGROUND:The diagnosis of tuberculous pleural effusion (TBPE) has some limitations. We studied the efficacy of interleukin-27 (IL-27) in the diagnosis of TBPE. METHODS:We measured IL-27, adenosine deaminase (ADA), ADA-2, interferon-gamma (IFNγ), and the ADA·IL-27 and ADA-2·IL-27 products in all the pleural effusion ...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.02749

    authors: Valdés L,San José E,Ferreiro L,Golpe A,Gude F,Álvarez-Dobaño JM,Pereyra MF,Toubes ME,González-Barcala FJ

    更新日期:2014-03-01 00:00:00

  • Impact of Spontaneous Breathing Trial on Work of Breathing Indices Derived From Esophageal Pressure, Electrical Activity of the Diaphragm, and Oxygen Consumption in Children.

    abstract:BACKGROUND:The present study aimed to characterize the behavior of 3 components of respiratory muscle function during mechanical ventilation weaning in children to better understand the respective impact of a spontaneous breathing trial on ventilatory mechanical action (esophageal pressure [Pes], ventilatory demand (el...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:10.4187/respcare.06351

    authors: Mortamet G,Nardi N,Groleau V,Essouri S,Fauroux B,Jouvet P,Emeriaud G

    更新日期:2019-05-01 00:00:00

  • Perceived benefits of the use of learning contracts to guide clinical education in respiratory care students.

    abstract:BACKGROUND:The benefits of contract learning have been identified in the literature as increased individualization to meet the student's individual needs, promotion of learner independence, and development of lifelong learning behaviors among students. METHODS:I used an "action research" approach to implement the cont...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:

    authors: Rye KJ

    更新日期:2008-11-01 00:00:00

  • In vitro comparison of the circulaire and AeroTee to a traditional nebulizer T-piece with corrugated tubing.

    abstract:BACKGROUND:Nebulizers are a popular means of delivering aerosolized medication, primarily albuterol, to the bronchial airways of patients, and there has been extensive research done on numerous nebulizers used with nebulizer T-pieces and corrugated tubing. Very little research has been performed on other types of nebul...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:

    authors: Piper SD

    更新日期:2000-03-01 00:00:00

  • The invasive (quantitative) diagnosis of ventilator-associated pneumonia.

    abstract::Although appropriate antibiotics may improve survival in patients with bacterial pneumonia, use of empirical broad-spectrum antibiotics in patients without infection is potentially harmful, facilitating colonization and superinfection with multiresistant microorganisms. Invasive diagnostic methods, including bronchoal...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:

    authors: Chastre J,Combes A,Luyt CE

    更新日期:2005-06-01 00:00:00

  • Diagnosis and management of post-traumatic pulmonary pseudocyst.

    abstract::Post-traumatic pulmonary pseudocyst is an uncommon cavitary lesion of the lung, which generally develops after blunt chest trauma. We saw a 22-year-old man with chest trauma, hemopneumothorax, and hemoptysis, on the day he fell from an electrical pylon. Intubation in the emergency department was followed by 4 days of ...

    journal_title:Respiratory care

    pub_type: 杂志文章

    doi:

    authors: Yazkan R,Ozpolat B,Sahinalp S

    更新日期:2009-04-01 00:00:00