scholarly journals A bench-to-bedside study about trigger asynchronies induced by the introduction of external gas into the non-invasive mechanical ventilation circuit

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Cristina Lalmolda ◽  
Pablo Flórez ◽  
Carles Grimau ◽  
Roberto Larrosa ◽  
Marta Corral ◽  
...  
Keyword(s):  
Invasive Mechanical Ventilation ◽  
Invasive Ventilation ◽  
Trigger System ◽  
Non Invasive ◽  
Gas Source ◽  
Ventilatory Pattern ◽  
Bench Study ◽  
Non Invasive Ventilation ◽  
Level Of Effort ◽  
Bench Model

AbstractTreatments that require the introduction of external gas into the non-invasive ventilation (NIV) circuit, such as aerosol and oxygen therapy, may influence the performance of the ventilator trigger system. The aim of the study was to determine the presence and type of asynchronies induced by external gas in the NIV circuit in a bench model and in a group of patients undergoing chronic NIV. Bench study: Four ventilators (one with two different trigger design types) and three gas sources (continuous flow at 4 and 9 l/min and pulsatile flow at 9 l/min) were selected in an active simulator model. The sensitivity of the trigger, the gas introduction position, the ventilatory pattern and the level of effort were also modified. The same ventilators and gas conditions were used in patients undergoing chronic NIV. Bench: the introduction of external gas caused asynchronies in 35.9% of cases (autotriggering 73%, ineffective effort 27%). Significant differences (p < 0.01) were detected according to the ventilator model and the gas source. In seven patients, the introduction of external gas induced asynchrony in 20.4% of situations (77% autotriggering). As in the bench study, there were differences in the occurrence of asynchronies depending on the ventilator model and gas source used. The introduction of external gas produces alterations in the ventilator trigger. These alterations are variable, and depend on the ventilator design and gas source. This phenomenon makes it advisable to monitor the patient at the start of treatment.

scholarly journals Trigger Asynchronies Induced by the Introduction of External Gas Into the Non-Invasive Mechanical Ventilation Circuit: A Bench-to-Bedside Study

2021 ◽  
Author(s):  
Cristina Lalmolda ◽  
Pablo Flórez ◽  
Carles Grimau ◽  
Roberto Larrosa ◽  
Marta Corral ◽  
...  
Keyword(s):  
Invasive Mechanical Ventilation ◽  
Invasive Ventilation ◽  
Trigger System ◽  
Non Invasive ◽  
Gas Source ◽  
Ventilatory Pattern ◽  
Bench Study ◽  
Non Invasive Ventilation ◽  
Level Of Effort ◽  
Bench Model

Abstract Background and objective: Treatments that require the introduction of external gas into the non-invasive ventilation (NIV) circuit, such as aerosol and oxygen therapy, may influence the performance of the ventilator trigger system. The aim of the study was to determine the presence and type of asynchronies induced by external gas in the NIV circuit in a bench model and in a group of patients undergoing chronic NIV.Methods: Bench study: Four ventilators (one with two different trigger design types) and three gas sources (continuous flow at 4 and 9 l/min and pulsatile flow at 9 l/min) were selected in an active simulator model. The sensitivity of the trigger, the gas introduction position, the ventilatory pattern and the level of effort were also modified.Clinical study: The same ventilators and gas conditions were used in patients undergoing chronic NIV.Results: Bench: The introduction of external gas caused asynchronies in 35.9% of cases (autotriggering 73%, ineffective effort 27%). Significant differences (p<0.01) were detected according to the ventilator model and the gas source.Clinical study: In seven patients, the introduction of external gas induced asynchrony in 20.4% of situations (77% autotriggering). As in the bench study, there were differences in the occurrence of asynchronies depending on the ventilator model and gas source used.Conclusion: The introduction of external gas produces alterations in the ventilator trigger. These alterations are variable, and depend on the ventilator design and gas source. This phenomenon makes it advisable to monitor the patient at the start of treatment.

scholarly journals Extracorporeal carbon dioxide removal for treatment of exacerbated chronic obstructive pulmonary disease (ORION): study protocol for a randomised controlled trial

Trials ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Tommaso Tonetti ◽  
Lara Pisani ◽  
Irene Cavalli ◽  
Maria Laura Vega ◽  
Elisa Maietti ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Controlled Trial ◽  
Invasive Mechanical Ventilation ◽  
Chronic Obstructive ◽  
Invasive Ventilation ◽  
Obstructive Pulmonary Disease ◽  
Non Invasive ◽  
Non Invasive Ventilation ◽  
Acute Exacerbations

Abstract Background Hypercapnic exacerbations are severe complications of chronic obstructive pulmonary disease (COPD), characterized by negative impact on prognosis, quality of life and healthcare costs. The present standard of care for acute exacerbations of COPD is non-invasive ventilation; when it fails, the use of invasive mechanical ventilation is inevitable, but is associated with extremely poor prognosis. Extracorporeal circuits designed to remove CO2 (ECCO2R) may enhance the efficacy of NIV to remove CO2 and avoid the worsening of respiratory acidosis, which inevitably leads to failure of non-invasive ventilation. Although the use of ECCO2R for acute exacerbations of COPD is steadily increasing, solid evidence on its efficacy and safety is scarce, thus the need for a randomized controlled trial. Methods multicenter randomized controlled unblinded clinical trial including 284 (142 per arm) patients with acute hypercapnic respiratory failure caused by exacerbation of COPD, requiring respiratory support with NIV. The primary outcome is event free survival at 28 days, a composite outcome defined by survival in absence of prolonged mechanical ventilation, severe hypoxemia, septic shock and second episode of COPD exacerbation. Secondary outcomes are incidence of endotracheal intubation and tracheostomy, intensive care and hospital length-of-stay and 90-day mortality. Discussion Acute exacerbations of COPD represent a significant burden in terms of prognosis, quality of life and healthcare costs. Lack definite evidence despite increasing use of ECCO2R justifies a randomized trial to evaluate whether patients with acute hypercapnic acidosis not responsive to NIV should undergo invasive mechanical ventilation (with all serious related risks) or be treated with ECCO2R to avoid invasive ventilation but be exposed to possible adverse events of ECCO2R. Owing to its pragmatic nature, sample size and composite primary outcome, this trial aims at providing valuable answers to relevant questions for clinical treatment of acute exacerbations of COPD. Trial registration ClinicalTrials.gov, NCT04582799. Registered 12 October 2020, .

Effects on Humidification and Ventilatory Parameters of Three Single-limb Heated-wired Circuits for Non-invasive Ventilation: A Bench Study

2020 ◽  
Vol 56 (1) ◽  
pp. 28-34 ◽  
Author(s):  
Jose M. Alonso-Iñigo ◽  
María J. Fas ◽  
Alejandro Albert ◽  
Abel Dolz ◽  
José M. Carratalá ◽  
...  
Keyword(s):  
Invasive Ventilation ◽  
Non Invasive ◽  
Bench Study ◽  
Non Invasive Ventilation ◽  
Ventilatory Parameters

scholarly journals Comparative bench study evaluation of different infant interfaces for non-invasive ventilation

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Giorgio Conti ◽  
Giorgia Spinazzola ◽  
Cesare Gregoretti ◽  
Giuliano Ferrone ◽  
Andrea Cortegiani ◽  
...  
Keyword(s):  
Invasive Ventilation ◽  
Non Invasive ◽  
Bench Study ◽  
Non Invasive Ventilation ◽  
Study Evaluation

scholarly journals Protocolized Post-Extubation Respiratory Support to prevent reintubation: protocol and statistical analysis plan for a clinical trial

BMJ Open ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. e030476 ◽  
Author(s):  
Jonathan Dale Casey ◽  
Erin R Vaughan ◽  
Bradley D Lloyd ◽  
Peter A Bilas ◽  
Eric J Hall ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Usual Care ◽  
Invasive Mechanical Ventilation ◽  
High Flow ◽  
Respiratory Support ◽  
Invasive Ventilation ◽  
High Flow Nasal Cannula ◽  
Non Invasive ◽  
Non Invasive Ventilation ◽  
Risk Patients

IntroductionFollowing extubation from invasive mechanical ventilation, nearly one in seven critically ill adults requires reintubation. Reintubation is independently associated with increased mortality. Postextubation respiratory support (non-invasive ventilation or high-flow nasal cannula applied at the time of extubation) has been reported in small-to-moderate-sized trials to reduce reintubation rates among hypercapnic patients, high-risk patients without hypercapnia and low-risk patients without hypercapnia. It is unknown whether protocolised provision of postextubation respiratory support to every patient undergoing extubation would reduce the overall reintubation rate, compared with usual care.Methods and analysisThe Protocolized Post-Extubation Respiratory Support (PROPER) trial is a pragmatic, cluster cross-over trial being conducted between 1 October 2017 and 31 March 2019 in the medical intensive care unit of Vanderbilt University Medical Center. PROPER compares usual care versus protocolized post-extubation respiratory support (a respiratory therapist-driven protocol that advises the provision of non-invasive ventilation or high-flow nasal cannula based on patient characteristics). For the duration of the trial, the unit is divided into two clusters. One cluster receives protocolised support and the other receives usual care. Each cluster crosses over between treatment group assignments every 3 months. All adults undergoing extubation from invasive mechanical ventilation are enrolled except those who received less than 12 hours of mechanical ventilation, have ‘Do Not Intubate’ orders, or have been previously reintubated during the hospitalisation. The anticipated enrolment is approximately 630 patients. The primary outcome is reintubation within 96 hours of extubation.Ethics and disseminationThe trial was approved by the Vanderbilt Institutional Review Board. The results will be submitted for publication in a peer-reviewed journal and presented at one or more scientific conferences.Trial registration numberNCT03288311.

scholarly journals Limitations of the ARDS criteria during high-flow oxygen or non-invasive ventilation: Evidence from critically ill COVID-19 patients

2021 ◽  
Author(s):  
Michael Hultström ◽  
Ola Hellkvist ◽  
Lucian Covaciu ◽  
Filip Fredén ◽  
Robert Frithiof ◽  
...  
Keyword(s):  
Invasive Mechanical Ventilation ◽  
High Flow ◽  
University Hospital ◽  
Respiratory Support ◽  
Arterial Oxygen ◽  
Invasive Ventilation ◽  
Steady State Condition ◽  
Non Invasive ◽  
Non Invasive Ventilation ◽  
High Flow Oxygen

Abstract Introduction The ratio of partial pressure of arterial oxygen to inspired oxygen fraction (PaO2/FIO2) during invasive mechanical ventilation (MV) is used as criteria to grade the severity of respiratory failure in acute respiratory distress syndrome (ARDS). During the SARS-CoV2 pandemic the use of PaO2/FIO2 ratio has been increasingly used in non-invasive respiratory support such as high-flow nasal cannula (HFNC) and non-invasive ventilation (NIV). The grading of hypoxemia in non-invasively ventilated patients is uncertain. The main hypothesis, investigated in this study, was that the PaO2/FIO2 ratio does not change when switching between MV, NIV and HFNC. Methods This was a sub-study of a single-center prospective observational study of patients admitted to the intensive care unit (ICU) at Uppsala University Hospital in Sweden for critical COVID-19. In a steady state condition, the PaO2/FIO2 ratio was recorded before and after any change between two of the studied respiratory support techniques (i.e., HFNC, NIV and MV). Results A total of 148 patients were included in the present analysis. We find that any change in respiratory support from or to HFNC caused a significant change in PaO2/FIO2 ratio (up to 48 mmHg, from HFNC to MV). Changes in respiratory support between NIV and MV did not show consistent change in PaO2/FIO2 ratio. In patients classified as mild to moderate ARDS during MV, the change from HFNC to MV showed a variable increase in PaO2/FIO2 ratio ranging between 52 and 140 mmHg (median of 127 mm Hg). This made prediction of ARDS severity during MV from the apparent ARDS grade during HFNC impossible. Conclusion HFNC is associated with lower PaO2/FIO2 ratio than either NIV or MV in the same patient, while NIV and MV provided similar PaO2/FIO2 and thus ARDS grade by Berlin definition. The large variation of PaO2/FIO2 ratio precludes using ARDS grade as a measure of pulmonary damage during HFNC.

scholarly journals Adverse Effects of Non-Invasive Ventilation in Chronic Heart Failure: Keys to Avoid Complications

2021 ◽  
pp. 1-3
Author(s):  
Laura Anoro Abenoza ◽  
Laura Anoro Abenoza ◽  
Buisán Esporrín Cristina
Keyword(s):  
Heart Failure ◽  
Chronic Heart Failure ◽  
Adverse Effects ◽  
Invasive Mechanical Ventilation ◽  
Close Monitoring ◽  
Invasive Ventilation ◽  
Non Invasive ◽  
Non Invasive Ventilation ◽  
Acute Complications ◽  
Special Mention

Non-invasive mechanical ventilation (NIMV) is a therapeutic procedure that aims to supplement or improve ventilatory function. In recent decades, its benefit and multiple indications, have been demonstrated in the treatment of patients with chronic heart failure (CHF) and its acute complications [1]. However, the use of this therapy, in patients with chronic heart failure is not exempt from risks and complications, so it must be carefully individualized and requires close monitoring when ischaemic heart disease and/or arterial hypotension also coexist. Special mention requires the revision of the indication of servo ventilation in patients with severe chronic heart failure, due to its possible adverse effects.

scholarly journals Role of Non-Invasive Mechanical Ventilation for Acute Respiratory Failure in Cancer Patients

2020 ◽  
Vol 3 (1) ◽  
pp. 298-301
Author(s):  
Madindra Bahadur Basnet ◽  
Krishna Prasad Acharya ◽  
Deepak Adhikari
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Respiratory Failure ◽  
Acute Respiratory Failure ◽  
Cancer Patients ◽  
Invasive Mechanical Ventilation ◽  
Invasive Ventilation ◽  
Timely Initiation ◽  
Non Invasive ◽  
Non Invasive Ventilation

Introduction: Acute respiratory failure is a common cause of Intensive care Unit admission for cancer patients. Non-invasive ventilation comes in between the two extreme situations: either provide only oxygen or ventilate invasively. This study was done to find the usefulness and efficacy of non-invasive ventilation in a cancer patient. Materials and Methods: A cross-sectional study was done at Nepal Cancer Hospital. Data analysis of patients requiring non-invasive ventilation at the Intensive care Unit from April 14, 2018, to April 13, 2019, were included. Results: Among 68 studied patients, the primary reason for the initiation of non-invasive ventilation sepsis (16.32%), pneumonia (10.88%), and lung cancer (10.2%). Postoperative atelectasis, pulmonary edema, and morphine overdose were associated with good respiratory improvement and Intensive care Unit survival (100%, 75% and 66.67% respectively). Respiratory failure with carcinoma lung, lung fibrosis, acute respiratory distress syndrome, terminally ill patients, and patients with low Glasgow Coma Scale had high failure rates (Survival: 13.33%, 14.29%, 16.67%, 0%, and 20% respectively). Conclusions: Non-invasive ventilation seems to be an effective way of ventilation for cancer patients. The selection of patients and timely initiation of non-invasive ventilation is of utmost importance for a better outcome.  

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