scholarly journals Severe COVID-19 pneumonia and barotrauma: From the frying pan into the fire

2021 ◽  
Author(s):  
Hariprasad Kalpakam ◽  
Sameer Bansal ◽  
Nithya Suresh ◽  
Samson Kade ◽  
Anmol Thorbole ◽  
...  
Keyword(s):  
Care Center ◽  
Clinical Status ◽  
Invasive Mechanical Ventilation ◽  
Fatal Outcome ◽  
Respiratory Support ◽  
Positive Pressure ◽  
Related Factors ◽  
Non Invasive ◽  
Non Invasive Ventilation ◽  
High Incidence

AbstractAimCOVID-19 pneumonia with ARDS (C-ARDS) has a high mortality. Preliminary reports indicate a higher incidence of barotrauma in patients with C-ARDS[1] both on invasive mechanical ventilation (iMV) and non-invasive ventilation (NIV) This study examines the incidence and risk factors for barotrauma and change in outcomes after barotrauma in patients with severe C-ARDS on positive pressure respiratory support (PPRS).Methods and materialsThis is a retrospective study of C-ARDS associated barotrauma over 5 months in patients on PPRS in a tertiary COVID care center. The type of barotrauma, intervention, related factors, such as type of respiratory support (iMV vs NIV), airway pressure prior to the occurrence of barotrauma, and post-barotrauma outcomes were analyzed.ResultsA total of 38/410 (9.3%) C-ARDS patients on PPRS [mean age 57.82 ± 13.3 years, 32 males (84.2%)] developed barotrauma. Of these, 20 patients (52.6%) were on NIV and 18 (47.4%) patients were iMV on standard recommended settings. The median P/F ratio of patients on MV at the time of barotrauma was 116.4 (IQR 72.4, 193.25). The details of barotrauma were as follows: 24 patients had pneumothorax (PTX), 2 had pneumo-mediastinum and 12 had subcutaneous emphysema. Overall, 24/38 (63.2%) patients, including 15/18 (83.3%) on MV succumbed to their illness. The barotrauma happened a median of 6.5 days (IQR 4.75,13) after admission and 15 days (IQR 10.25,18.0) from symptom onset. The median duration from barotrauma to death was 7 days (IQR 2.25, 8.0) and barotrauma to discharge (for survivors) was 12.5 days (IQR 8.0, 21.25). All patients received steroids and 11/38 (28.9%) received additional immunosuppression with tocilizumab.ConclusionA high incidence of barotrauma was seen in this large series of severe C-ARDS patients on PPRS. Barotrauma led to further deterioration in the clinical status leading to a fatal outcome in the majority of the MV patients, despite prompt treatment.

scholarly journals Use of Nasal Non-Invasive Ventilation with a RAM Cannula in the Outpatient Home Setting

2017 ◽  
Vol 11 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Wilfredo De Jesus Rojas ◽  
Cheryl L. Samuels ◽  
Traci R. Gonzales ◽  
Katrina E. McBeth ◽  
Aravind Yadav ◽  
...  
Keyword(s):  
Respiratory Failure ◽  
Lung Disease ◽  
Chest Wall ◽  
Chronic Respiratory Failure ◽  
Respiratory Support ◽  
Positive Pressure ◽  
Successful Implementation ◽  
Invasive Ventilation ◽  
Non Invasive ◽  
Non Invasive Ventilation

Background: Nasal non-invasive-ventilation (Nasal NIV) is a mode of ventilatory support providing positive pressure to patients via a nasal interface. The RAM Cannula is an oxygen delivery device that can be used as an alternative approach to deliver positive pressure. Together they have been successfully used to provide respiratory support in neonatal in-patient settings. Objective: To describe the outpatient use of Nasal NIV/RAM Cannula as a feasible alternative for home respiratory support in children with chronic respiratory failure. Methods: We performed a retrospective case series of 18 children (4 months to 19 years old) using the Nasal NIV/RAM Cannula in the Pediatric Pulmonary Clinic at the McGovern Medical School, UTHealth (2014-16). Consideration for Nasal NIV/RAM Cannula utilization included: inability to wean-off in-patient respiratory support, comfort for dyspnea, intolerability of conventional mask interfaces and tracheostomy avoidance. Results: Average age was 7 years. 50% were Caucasian, 38% African-American and 11% Hispanics. Pulmonary disorders included: chest wall weakness (38%), central control abnormalities (33%), obstructive lung disease (16%) and restrictive lung disease (11%). Indications for Nasal NIV/RAM Cannula initiation included: CPAP/BPAP masks intolerability (11%), dyspnea secondary to chest wall weakness (38%) and tracheostomy avoidance (50%). Average length of use of Nasal NIV/RAM Cannula was 8.4 months. Successful implementation of Nasal NIV/Ram Cannula was 94%. One patient required a tracheostomy following the use of Nasal NIV/RAM Cannula. Significant decrease in arterial PaCO2 pre and post Nasal NIV/RAM cannula initiation was notable (p=0.001). Conclusion: Outpatient use of Nasal NIV/RAM Cannula may prove to be a feasible and save treatment alternative for children with chronic respiratory failure, chest wall weakness, dyspnea and traditional nasal/face mask intolerance to avoid tracheostomy.

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.

Non-invasive ventilation in intensive care unit: yesterday, today, tomorrow (literature review)

2021 ◽  
pp. 42-51
Author(s):  
A. V. Vlasenko ◽  
A. G. Koryakin ◽  
E. A. Evdokimov ◽  
I. S. Klyuev
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Respiratory Failure ◽  
Respiratory Support ◽  
Positive Pressure ◽  
Invasive Ventilation ◽  
Negative Effects ◽  
Non Invasive ◽  
Non Invasive Ventilation ◽  
The One

The development of medical technologies and the emergence of new methods of respiratory support with extensive capabilities to control positive pressure on the inhale and exhale made it possible to implement non-invasive ventilation. The integration of microprocessors in modern respiratory interfaces, on the one hand, and a deeper understanding of the mechanisms of the pathogenesis of respiratory failure, on the other hand, made it possible to improve and implement various methods of non-invasive respiratory support in everyday clinical practice. The experience gained in recent decades with the use of non-invasive ventilation made it possible to widely use this method of respiratory support in a wide variety of clinical situations. However, the selection of patients for mask ventilation, the choice of method and algorithm for its application, prognosis of effectiveness, prevention of negative effects, as before, remain relevant. This dictates the need to continue studying the clinical efficacy of non-invasive ventilation in patients with respiratory failure of various origins. The review presents the possibilities and limitations of the use of non-invasive respiratory support in patients with respiratory failure in the intensive care unit.

Incidence, predictors and prognosis of respiratory support in non-ST segment elevation myocardial infarction

2020 ◽  
pp. 204887262091994
Author(s):  
Thomas Metkus ◽  
P Elliott Miller ◽  
Carlos L Alviar ◽  
Jacob C Jentzer ◽  
Sean van Diepen ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Mechanical Ventilation ◽  
Invasive Mechanical Ventilation ◽  
Respiratory Support ◽  
Invasive Ventilation ◽  
St Segment Elevation ◽  
Non Invasive ◽  
Segment Elevation Myocardial Infarction ◽  
Non Invasive Ventilation ◽  
St Segment

Background The incidences of invasive mechanical ventilation and non-invasive ventilation among patients with non-ST segment elevation myocardial infarction and associated prognosis are not well characterized. Methods We conducted a retrospective cohort study of patients with admission diagnosis of non-ST segment elevation myocardial infarction using the US National Inpatient Sample database between 2002–2014. The exposure variable was invasive mechanical ventilation or non-invasive ventilation within 24 h of admission, compared to no respiratory support. The primary outcome was in-hospital mortality. We determined the association between respiratory support and mortality using Cox proportional hazard models. Results A total of 4,152,421 non-ST segment elevation myocardial infarction hospitalizations were identified, among whom 1.3% required non-invasive ventilation and 1.9% required invasive mechanical ventilation. Non-invasive ventilation use increased over time (0.4% in 2002 to 2.4% in 2014, p<0.001) while there was no definite trend in invasive mechanical ventilation use. Revascularization was lower for non-ST segment elevation myocardial infarction hospitalizations including invasive mechanical ventilation (23.9%) and non-invasive ventilation (14.5%) compared to 36.5% of those without respiratory support ( p<0.001). In-hospital mortality was 3.1% for non-ST segment elevation myocardial infarction without respiratory support compared to 9.2% with non-invasive ventilation (adjusted hazard ratio 1.86, 95% confidence interval 1.74–1.98) and 37.2% with invasive mechanical ventilation (adjusted hazard ratio 3.03, 95% confidence interval 2.88–3.19). Mortality for non-ST segment elevation myocardial infarction-non-invasive ventilation is improving over time while mortality for non-ST segment elevation myocardial infarction-invasive mechanical ventilation is increasing over time. Conclusion Mechanical respiratory support in non-ST segment elevation myocardial infarction is used in an important minority of cases, is increasing and is independently associated with mortality. Studies of the optimal management of acute coronary syndrome complicated by respiratory failure are needed to improve outcomes.

scholarly journals The Intertemporal Role of Respiratory Support in Improving Neonatal Outcomes: A Narrative Review

Children ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 883
Author(s):  
Kosmas Sarafidis ◽  
William Chotas ◽  
Eleni Agakidou ◽  
Paraskevi Karagianni ◽  
Vasiliki Drossou
Keyword(s):  
Invasive Mechanical Ventilation ◽  
Cost Benefit ◽  
Respiratory Support ◽  
Non Invasive ◽  
Non Invasive Ventilation ◽  
Future Challenges ◽  
Key Factor ◽  
The Cost ◽  
Administration Methods

Defining improvements in healthcare can be challenging due to the need to assess multiple outcomes and measures. In neonates, although progress in respiratory support has been a key factor in improving survival, the same degree of improvement has not been documented in certain outcomes, such as bronchopulmonary dysplasia. By exploring the evolution of neonatal respiratory care over the last 60 years, this review highlights not only the scientific advances that occurred with the application of invasive mechanical ventilation but also the weakness of the existing knowledge. The contributing role of non-invasive ventilation and less-invasive surfactant administration methods as well as of certain pharmacological therapies is also discussed. Moreover, we analyze the cost–benefit of neonatal care-respiratory support and present future challenges and perspectives.

scholarly journals Pneumomediastinum in patients with SARS-CoV-2 treated with non-invasive ventilation

2021 ◽  
Vol 14 (3) ◽  
pp. e241809
Author(s):  
Onn Shaun Thein ◽  
Muhammad Niazi ◽  
Abdisamad Ali ◽  
Adeel Sahal
Keyword(s):  
Positive Pressure Ventilation ◽  
Invasive Mechanical Ventilation ◽  
Best Supportive Care ◽  
Positive Pressure ◽  
Invasive Ventilation ◽  
Bridging Therapy ◽  
Non Invasive ◽  
Non Invasive Ventilation ◽  
Common Causes ◽  
Poor Outcomes

SARS-CoV-2, causing the pandemic COVID-19, has rapidly spread, overwhelming healthcare systems. Non-invasive positive pressure ventilation (NIV) can be used as a bridging therapy to delay invasive mechanical ventilation or as a standalone therapy. Spontaneous pneumomediastinum is rare and self-limiting, but there is an increased incidence documented in COVID-19.Here we document two cases of pneumomediastinum-related prolonged NIV therapy in severe COVID-19. Patient 1, a 64-year-old man, who developed symptoms after NIV therapy was weaned and survived. Patient 2, an 82-year-old woman, failed to improve despite NIV therapy, on investigation was found to have a pneumomediastinum. After review, the patient was placed on best supportive care and died 3 days later.We highlight the importance of recognising less common causes of deterioration in severe COVID-19 treated with NIV. In addition, pneumomediastinum in these cases may not always lead to poor outcomes.

Non-invasive positive-pressure ventilation

2016 ◽  
Author(s):  
Giulia Spoletini ◽  
Nicholas S. Hill
Keyword(s):  
Risk Factors ◽  
Respiratory Failure ◽  
Clinical Status ◽  
Length Of Hospital Stay ◽  
Positive Pressure ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Non Invasive ◽  
Non Invasive Ventilation ◽  
Acute Exacerbations

Non-invasive ventilation (NIV) has been increasingly used over the past decades to avoid endotracheal intubation (ETI) in critical care settings. In selected patients with acute respiratory failure, NIV improves the overall clinical status more rapidly than standard oxygen therapy, avoids ETI and its complications, reduces length of hospital stay, and improves survival. NIV is primarily indicated in respiratory failure due to acute exacerbations of chronic obstructive pulmonary disease, cardiogenic pulmonary oedema and associated with immunocompromised states. Weaker evidence supports its use in other forms of acute hypercapnic and hypoxaemic respiratory failure. Candidates for NIV should be carefully selected taking into consideration the risk factors for NIV failure. Patients on NIV who are unstable or have risk factors for NIV failure should be monitored in an intensive or intermediate care units by experienced personnel to avoid delay when intubation is needed. Stable NIV patients can be monitored on regular wards.

scholarly journals Laryngeal closure impedes non-invasive ventilation at birth

2017 ◽  
Vol 103 (2) ◽  
pp. F112-F119 ◽  
Author(s):  
Jessica R Crawshaw ◽  
Marcus J Kitchen ◽  
Corinna Binder-Heschl ◽  
Marta Thio ◽  
Megan J Wallace ◽  
...  
Keyword(s):  
Airway Obstruction ◽  
Premature Infants ◽  
Respiratory Support ◽  
Positive Pressure ◽  
Invasive Ventilation ◽  
Breathing Patterns ◽  
Laryngeal Function ◽  
Non Invasive ◽  
Laryngeal Closure ◽  
Non Invasive Ventilation

BackgroundNon-invasive ventilation is sometimes unable to provide the respiratory needs of very premature infants in the delivery room. While airway obstruction is thought to be the main problem, the site of obstruction is unknown. We investigated whether closure of the larynx and epiglottis is a major site of airway obstruction.MethodsWe used phase contrast X-ray imaging to visualise laryngeal function in spontaneously breathing premature rabbits immediately after birth and at approximately 1 hour after birth. Non-invasive respiratory support was applied via a facemask and images were analysed to determine the percentage of the time the glottis and the epiglottis were open.HypothesisImmediately after birth, the larynx is predominantly closed, only opening briefly during a breath, making non-invasive intermittent positive pressure ventilation (iPPV) ineffective, whereas after lung aeration, the larynx is predominantly open allowing non-invasive iPPV to ventilate the lung.ResultsThe larynx and epiglottis were predominantly closed (open 25.5%±1.1% and 17.1%±1.6% of the time, respectively) in pups with unaerated lungs and unstable breathing patterns immediately after birth. In contrast, the larynx and the epiglottis were mostly open (90.5%±1.9% and 72.3%±2.3% of the time, respectively) in pups with aerated lungs and stable breathing patterns irrespective of time after birth.ConclusionLaryngeal closure impedes non-invasive iPPV at birth and may reduce the effectiveness of non-invasive respiratory support in premature infants immediately after birth.

scholarly journals Pulmonary Barotrauma in COVID-19 Patients With ARDS on Invasive and Non-Invasive Positive Pressure Ventilation

2021 ◽  
pp. 088506662110197
Author(s):  
Kartikeya Rajdev ◽  
Alan J. Spanel ◽  
Sean McMillan ◽  
Shubham Lahan ◽  
Brian Boer ◽  
...  
Keyword(s):  
Airway Pressure ◽  
Positive Pressure Ventilation ◽  
Positive Airway Pressure ◽  
Invasive Mechanical Ventilation ◽  
Tertiary Care ◽  
Positive Pressure ◽  
Pulmonary Barotrauma ◽  
Invasive Group ◽  
Non Invasive ◽  
High Incidence

Background: We experienced a high incidence of pulmonary barotrauma among patients with coronavirus disease-2019 (COVID-19) associated acute respiratory distress syndrome (ARDS) at our institution. In current study, we sought to estimate the incidence, clinical outcomes, and characteristics of barotrauma among COVID-19 patients receiving invasive and non-invasive positive pressure ventilation. Methodology: We conducted this retrospective cohort study of adult patients diagnosed with COVID-19 pneumonia and requiring oxygen support or positive airway pressure for ARDS who presented to our tertiary care center from March through November, 2020. Results: A total of 353 patients met our inclusion criteria, of which 232patients who required heated high-flow nasal cannula, continuous or bilevel positive airway pressure were assigned to non-invasive group. The remaining 121 patients required invasive mechanical ventilation and were assigned to invasive group. Of the 353 patients, 32 patients (65.6% males) with a mean age of 63 ± 11 years developed barotrauma in the form of either subcutaneous emphysema, pneumothorax, or pneumomediastinum. The incidence of barotrauma was 4.74% (11/232) and 17.35% (21/121) in non-invasive group and invasive group, respectively. The median length of hospital stay was 22 (15.7 −33.0) days with an overall mortality of 62.5% (n = 20). Conclusions: Patients with COVID-19 ARDS have a high incidence rate of barotrauma. Pulmonary barotrauma should be considered in patients with COVID-19 pneumonia who exhibit worsening of their respiratory disease as it is likely associated with a high mortality risk. Utilizing lung-protective ventilation strategies may reduce the risk of barotrauma.

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