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Spinazzola G, Ferrone G, Costa R, Piastra M, Maresca G, Rossi M, Antonelli M, Conti G. Comparative evaluation of three total full-face masks for delivering Non-Invasive Positive Pressure Ventilation (NPPV): a bench study. BMC Pulm Med 2023; 23:189. [PMID: 37259052 DOI: 10.1186/s12890-023-02489-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 05/23/2023] [Indexed: 06/02/2023] Open
Abstract
Historically, the oro-nasal mask has been the preferred interface to deliver Non-Invasive Positive Pressure Ventilation (NPPV) in critically ill patients. To overcome the problems related to air leaks and discomfort, Total Full-face masks have been designed. No study has comparatively evaluated the performance of the total Full-face masks available.The aim of this bench study was to evaluate the influence of three largely diffuse models of total Full -face masks on patient-ventilator synchrony and performance during pressure support ventilation. NPPV was applied to a mannequin, connected to an active test lung through three largely diffuse Full-face masks: Dimar Full-face mask (DFFM), Performax Full-face mask (RFFM) and Pulmodyne Full-face mask (PFFM).The performance analysis showed that the ΔPtrigger was significantly lower with PFFM (p < 0.05) at 20 breaths/min (RRsim) at both pressure support (iPS) levels applied, while, at RRsim 30, DFFM had the longest ΔPtrigger compared to the other 2 total full face masks (p < 0.05). At all ventilator settings, the PTP200 was significantly shorter with DFFM than with the other two total full-face masks (p < 0.05). In terms of PTP500 ideal index (%), we did not observe significant differences between the interfaces tested.The PFFM demonstrated the best performance and synchrony at low respiratory rates, but when the respiratory rate increased, no difference between all tested total full-face masks was reported.
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Affiliation(s)
- Giorgia Spinazzola
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito N 8, 00168, Rome, Italy.
- Istituto Di Anestesiologia E Rianimazione, Università Cattolica del Sacro Cuore, Largo Francesco Vito 8, Rome, Italy.
| | - Giuliano Ferrone
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito N 8, 00168, Rome, Italy
- Istituto Di Anestesiologia E Rianimazione, Università Cattolica del Sacro Cuore, Largo Francesco Vito 8, Rome, Italy
| | - Roberta Costa
- Istituto Di Anestesiologia E Rianimazione, Università Cattolica del Sacro Cuore, Largo Francesco Vito 8, Rome, Italy
| | - Marco Piastra
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito N 8, 00168, Rome, Italy
- Istituto Di Anestesiologia E Rianimazione, Università Cattolica del Sacro Cuore, Largo Francesco Vito 8, Rome, Italy
| | - Gianmarco Maresca
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito N 8, 00168, Rome, Italy
- Istituto Di Anestesiologia E Rianimazione, Università Cattolica del Sacro Cuore, Largo Francesco Vito 8, Rome, Italy
| | - Marco Rossi
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito N 8, 00168, Rome, Italy
- Istituto Di Anestesiologia E Rianimazione, Università Cattolica del Sacro Cuore, Largo Francesco Vito 8, Rome, Italy
| | - Massimo Antonelli
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito N 8, 00168, Rome, Italy
- Istituto Di Anestesiologia E Rianimazione, Università Cattolica del Sacro Cuore, Largo Francesco Vito 8, Rome, Italy
| | - Giorgio Conti
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo Francesco Vito N 8, 00168, Rome, Italy
- Istituto Di Anestesiologia E Rianimazione, Università Cattolica del Sacro Cuore, Largo Francesco Vito 8, Rome, Italy
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Mojoli F, Orlando A, Bianchi IM, Puce R, Arisi E, Salve G, Maggio G, Mongodi S, Pozzi M. Waveforms-guided cycling-off during pressure support ventilation improves both inspiratory and expiratory patient-ventilator synchronisation. Anaesth Crit Care Pain Med 2022; 41:101153. [PMID: 36084912 DOI: 10.1016/j.accpm.2022.101153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/19/2022] [Accepted: 08/11/2022] [Indexed: 11/01/2022]
Abstract
OBJECTIVE To test the performance of a software able to control mechanical ventilator cycling-off by means of automatic, real-time analysis of ventilator waveforms during pressure support ventilation. DESIGN Prospective randomised crossover study. SETTING University Intensive Care Unit. PATIENTS Fifteen difficult-to-wean patients under pressure support ventilation. INTERVENTIONS Patients were ventilated using a G5 ventilator (Hamilton Medical, Bonaduz, Switzerland) with three different cycling-off settings: standard (expiratory trigger sensitivity set at 25% of peak inspiratory flow), optimised by an expert clinician and automated; the last two settings were tested at baseline pressure support and after a 50% increase in pressure support. MEASUREMENTS AND MAIN RESULTS Ventilator waveforms were recorded and analysed by four physicians experts in waveforms analysis. Major and minor asynchronies were detected and total asynchrony time computed. Automation compared to standard setting reduced cycling delay from 407 ms [257-567] to 59 ms [22-111] and ineffective efforts from 12.5% [3.4-46.4] to 2.8% [1.9-4.6]) at baseline support (p < 0.001); expert optimisation performed similarly. At high support both cycling delay and ineffective efforts increased, mainly in the case of expert setting, with the need of reoptimisation of expiratory trigger sensitivity. At baseline support, asynchrony time decreased from 39.9% [27.4-58.7] with standard setting to 32% [22.3-39.4] with expert optimisation (p < 0.01) and to 24.4% [19.6-32.5] with automation (p < 0.001). Both at baseline and at high support, asynchrony time was lower with automation than with expert setting. CONCLUSIONS Cycling-off guided by automated real-time waveforms analysis seems a reliable solution to improve synchronisation in difficult-to-wean patients under pressure support ventilation.
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Affiliation(s)
- Francesco Mojoli
- Anaesthesia and Intensive Care, Emergency Department, Fondazione IRCCS Policlinico S. Matteo, Viale Golgi 19, 27100, Pavia, Italy; Anaesthesia, Intensive Care and Pain Therapy, Department of Clinical - Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Pavia, Italy.
| | - Anita Orlando
- Anaesthesia and Intensive Care, Emergency Department, Fondazione IRCCS Policlinico S. Matteo, Viale Golgi 19, 27100, Pavia, Italy
| | - Isabella Maria Bianchi
- Anaesthesia, Intensive Care and Pain Therapy, Department of Clinical - Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Pavia, Italy
| | - Roberta Puce
- Anaesthesia and Intensive Care, Emergency Department, Fondazione IRCCS Policlinico S. Matteo, Viale Golgi 19, 27100, Pavia, Italy
| | - Eric Arisi
- Anaesthesia and Intensive Care, Emergency Department, Fondazione IRCCS Policlinico S. Matteo, Viale Golgi 19, 27100, Pavia, Italy
| | - Giulia Salve
- Anaesthesia, Intensive Care and Pain Therapy, Department of Clinical - Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Pavia, Italy
| | - Giuseppe Maggio
- Anaesthesia and Intensive Care, Emergency Department, Fondazione IRCCS Policlinico S. Matteo, Viale Golgi 19, 27100, Pavia, Italy
| | - Silvia Mongodi
- Anaesthesia and Intensive Care, Emergency Department, Fondazione IRCCS Policlinico S. Matteo, Viale Golgi 19, 27100, Pavia, Italy
| | - Marco Pozzi
- Anaesthesia and Intensive Care, Emergency Department, Fondazione IRCCS Policlinico S. Matteo, Viale Golgi 19, 27100, Pavia, Italy
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Albani F, Fusina F, Ciabatti G, Pisani L, Lippolis V, Franceschetti ME, Giovannini A, di Mussi R, Murgolo F, Rosano A, Grasso S, Natalini G. Flow Index accurately identifies breaths with low or high inspiratory effort during pressure support ventilation. Crit Care 2021; 25:427. [PMID: 34911541 DOI: 10.1186/s13054-021-03855-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 12/03/2021] [Indexed: 01/19/2023] Open
Abstract
Background Flow Index, a numerical expression of the shape of the inspiratory flow-time waveform recorded during pressure support ventilation, is associated with patient inspiratory effort. The aim of this study was to assess the accuracy of Flow Index in detecting high or low inspiratory effort during pressure support ventilation and to establish cutoff values for the Flow index to identify these conditions. The secondary aim was to compare the performance of Flow index,of breathing pattern parameters and of airway occlusion pressure (P0.1) in detecting high or low inspiratory effort during pressure support ventilation. Methods Data from 24 subjects was included in the analysis, accounting for a total of 702 breaths. Breaths with high inspiratory effort were defined by a pressure developed by inspiratory muscles (Pmusc) greater than 10 cmH2O while breaths with low inspiratory effort were defined by a Pmusc lower than 5 cmH2O. The areas under the receiver operating characteristic curves of Flow Index and respiratory rate, tidal volume,respiratory rate over tidal volume and P0.1 were analyzed and compared to identify breaths with low or high inspiratory effort. Results Pmusc, P0.1, Pressure Time Product and Flow Index differed between breaths with high, low and intermediate inspiratory effort, while RR, RR/VT and VT/kg of IBW did not differ in a statistically significant way. A Flow index higher than 4.5 identified breaths with high inspiratory effort [AUC 0.89 (CI 95% 0.85–0.93)], a Flow Index lower than 2.6 identified breaths with low inspiratory effort [AUC 0.80 (CI 95% 0.76–0.83)]. Conclusions Flow Index is accurate in detecting high and low spontaneous inspiratory effort during pressure support ventilation. Supplementary Information The online version contains supplementary material available at 10.1186/s13054-021-03855-4.
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Abstract
Patient-ventilator asynchrony is very common in newborns. Achieving synchrony is quite challenging because of small tidal volumes, high respiratory rates, and the presence of leaks. Leaks also cause unreliable monitoring of respiratory metrics. In addition, ventilator adjustment must take into account that infants have strong vagal reflexes and demonstrate central apnea and periodic breathing, with a high variability in breathing pattern. Neurally adjusted ventilatory assist (NAVA) is a mode of ventilation whereby the timing and amount of ventilatory assist is controlled by the patient's own neural respiratory drive. As NAVA uses the diaphragm electrical activity (Edi) as the controller signal, it is possible to deliver synchronized assist, both invasively and noninvasively (NIV-NAVA), to follow the variability in breathing pattern, and to monitor patient respiratory drive, independent of leaks. This article provides an updated review of the physiology and the scientific literature pertaining to the use of NAVA in children (neonatal and pediatric age groups). Both the invasive NAVA and NIV-NAVA publications since 2016 are summarized, as well as the use of Edi monitoring. Overall, the use of NAVA and Edi monitoring is feasible and safe. Compared with conventional ventilation, NAVA improves patient-ventilator interaction, provides lower peak inspiratory pressure, and lowers oxygen requirements. Evidence from several studies suggests improved comfort, less sedation requirements, less apnea, and some trends toward reduced length of stay and more successful extubation.
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Affiliation(s)
- Jennifer Beck
- Department of Critical Care, St. Michael's Hospital, 30 Bond Street, Toronto, Ontario M5B1W8, Canada; Department of Pediatrics, University of Toronto, Toronto, Canada; Institute for Biomedical Engineering and Science Technology (iBEST) at Ryerson University and St-Michael's Hospital, Toronto, Canada.
| | - Christer Sinderby
- Department of Critical Care, St. Michael's Hospital, 30 Bond Street, Toronto, Ontario M5B1W8, Canada; Institute for Biomedical Engineering and Science Technology (iBEST) at Ryerson University and St-Michael's Hospital, Toronto, Canada; Department of Medicine and Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
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Albani F, Pisani L, Ciabatti G, Fusina F, Buizza B, Granato A, Lippolis V, Aniballi E, Murgolo F, Rosano A, Latronico N, Antonelli M, Grasso S, Natalini G. Flow Index: a novel, non-invasive, continuous, quantitative method to evaluate patient inspiratory effort during pressure support ventilation. Crit Care 2021; 25:196. [PMID: 34099028 PMCID: PMC8182360 DOI: 10.1186/s13054-021-03624-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 05/31/2021] [Indexed: 02/08/2023]
Abstract
Background The evaluation of patient effort is pivotal during pressure support ventilation, but a non-invasive, continuous, quantitative method to assess patient inspiratory effort is still lacking. We hypothesized that the concavity of the inspiratory flow-time waveform could be useful to estimate patient’s inspiratory effort. The purpose of this study was to assess whether the shape of the inspiratory flow, as quantified by a numeric indicator, could be associated with inspiratory effort during pressure support ventilation. Methods Twenty-four patients in pressure support ventilation were enrolled. A mathematical relationship describing the decay pattern of the inspiratory flow profile was developed. The parameter hypothesized to estimate effort was named Flow Index. Esophageal pressure, airway pressure, airflow, and volume waveforms were recorded at three support levels (maximum, minimum and baseline). The association between Flow Index and reference measures of patient effort (pressure time product and pressure generated by respiratory muscles) was evaluated using linear mixed effects models adjusted for tidal volume, respiratory rate and respiratory rate/tidal volume. Results Flow Index was different at the three pressure support levels and all group comparisons were statistically significant. In all tested models, Flow Index was independently associated with patient effort (p < 0.001). Flow Index prediction of inspiratory effort agreed with esophageal pressure-based methods. Conclusions Flow Index is associated with patient inspiratory effort during pressure support ventilation, and may provide potentially useful information for setting inspiratory support and monitoring patient-ventilator interactions. Supplementary Information The online version contains supplementary material available at 10.1186/s13054-021-03624-3.
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Affiliation(s)
- Filippo Albani
- Department of Anesthesia and Intensive Care, Fondazione Poliambulanza, Brescia, Italy
| | - Luigi Pisani
- Department of Anesthesia and Intensive Care, Miulli Regional Hospital, Acquaviva Delle Fonti, Bari, Italy.,Mahidol Oxford Clinical Research Unit (MORU), Bangkok, Thailand
| | - Gianni Ciabatti
- Department of Anesthesiology, Neurointensive Care Unit, Azienda Ospedaliera Universitaria Careggi, Firenze, Italy
| | - Federica Fusina
- Department of Anesthesia and Intensive Care, Fondazione Poliambulanza, Brescia, Italy.
| | - Barbara Buizza
- Department of Anesthesia and Intensive Care, Spedali Civili, Brescia, Italy
| | - Anna Granato
- Department of Anesthesia and Intensive Care, Fondazione Poliambulanza, Brescia, Italy
| | - Valeria Lippolis
- Department of Anesthesia and Intensive Care, Mater Dei Hospital, Bari, Italy
| | - Eros Aniballi
- Department of Anesthesia, I.R.C.C.S. MultiMedica, Sesto San Giovanni, Milano, Italy
| | - Francesco Murgolo
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Antonio Rosano
- Department of Anesthesia and Intensive Care, Fondazione Poliambulanza, Brescia, Italy
| | - Nicola Latronico
- Department of Anesthesia and Intensive Care, Spedali Civili, Brescia, Italy.,Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Massimo Antonelli
- Department of Intensive Care and Anesthesiology, Fondazione Policlinico, Universitario A. Gemelli, Roma, Italy
| | - Salvatore Grasso
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Giuseppe Natalini
- Department of Anesthesia and Intensive Care, Fondazione Poliambulanza, Brescia, Italy
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Spinazzola G, Costa R, De Luca D, Chidini G, Ferrone G, Piastra M, Conti G. Pressure Support Ventilation (PSV) versus Neurally Adjusted Ventilatory Assist (NAVA) in difficult to wean pediatric ARDS patients: a physiologic crossover study. BMC Pediatr 2020; 20:334. [PMID: 32631305 PMCID: PMC7338290 DOI: 10.1186/s12887-020-02227-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/24/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Neurally adjusted ventilatory assist (NAVA) is an innovative mode for assisted ventilation that improves patient-ventilator interaction in children. The aim of this study was to assess the effects of patient-ventilator interaction comparing NAVA with pressure support ventilation (PSV) in patients difficult to wean from mechanical ventilation after moderate pediatric acute respiratory distress syndrome (PARDS). METHODS In this physiological crossover study, 12 patients admitted in the Pediatric Intensive Care Unit (PICU) with moderate PARDS failing up to 3 spontaneous breathing trials in less than 7 days, were enrolled. Patients underwent three study conditions lasting 1 h each: PSV1, NAVA and PSV2. RESULTS The Asynchrony Index (AI) was significantly reduced during the NAVA trial compared to both the PSV1 and PSV2 trials (p = 0.001). During the NAVA trial, the inspiratory and expiratory trigger delays were significantly shorter compared to those obtained during PSV1 and PSV2 trials (Delaytrinspp < 0.001, Delaytrexpp = 0.013). These results explain the significantly longer Timesync observed during the NAVA trial (p < 0.001). In terms of gas exchanges, PaO2 value significantly improved in the NAVA trial with respect to the PSV trials (p < 0.02). The PaO2/FiO2 ratio showed a significant improvement during the NAVA trial compared to both the PSV1 and PSV2 trials (p = 0.004). CONCLUSIONS In this specific PICU population, presenting difficulty in weaning after PARDS, NAVA was associated with a reduction of the AI and a significant improvement in oxygenation compared to PSV mode. TRIAL REGISTRATION ClinicalTrial.gov Identifier: NCT04360590 "Retrospectively registered".
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Affiliation(s)
- Giorgia Spinazzola
- Department of Anesthesia and Intensive Care, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo F. Vito 1, 00168, Rome, Italy.
| | - Roberta Costa
- Department of Anesthesia and Intensive Care, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo F. Vito 1, 00168, Rome, Italy
| | - Daniele De Luca
- Division of Pediatric and Neonatal Critical Care, South Paris University Hospital, Medical Centers "A. Beclere" Assistance Publique-Hopitaux de Paris (APHP), Paris, France
| | - Giovanna Chidini
- Pediatric Intensive Care Unit, Department of Anesthesia, Intensive Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Giuliano Ferrone
- Department of Anesthesia and Intensive Care, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo F. Vito 1, 00168, Rome, Italy
| | - Marco Piastra
- Department of Anesthesia and Intensive Care, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo F. Vito 1, 00168, Rome, Italy
| | - Giorgio Conti
- Department of Anesthesia and Intensive Care, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo F. Vito 1, 00168, Rome, Italy.,Division of Pediatric and Neonatal Critical Care, South Paris University Hospital, Medical Centers "A. Beclere" Assistance Publique-Hopitaux de Paris (APHP), Paris, France.,Pediatric Intensive Care Unit, Department of Anesthesia, Intensive Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.,Università Cattolica del Sacro Cuore, Roma, Italy
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de Haro C, Ochagavia A, López-Aguilar J, Fernandez-Gonzalo S, Navarra-Ventura G, Magrans R, Montanyà J, Blanch L. Patient-ventilator asynchronies during mechanical ventilation: current knowledge and research priorities. Intensive Care Med Exp 2019; 7:43. [PMID: 31346799 PMCID: PMC6658621 DOI: 10.1186/s40635-019-0234-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 03/07/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mechanical ventilation is common in critically ill patients. This life-saving treatment can cause complications and is also associated with long-term sequelae. Patient-ventilator asynchronies are frequent but underdiagnosed, and they have been associated with worse outcomes. MAIN BODY Asynchronies occur when ventilator assistance does not match the patient's demand. Ventilatory overassistance or underassistance translates to different types of asynchronies with different effects on patients. Underassistance can result in an excessive load on respiratory muscles, air hunger, or lung injury due to excessive tidal volumes. Overassistance can result in lower patient inspiratory drive and can lead to reverse triggering, which can also worsen lung injury. Identifying the type of asynchrony and its causes is crucial for effective treatment. Mechanical ventilation and asynchronies can affect hemodynamics. An increase in intrathoracic pressure during ventilation modifies ventricular preload and afterload of ventricles, thereby affecting cardiac output and hemodynamic status. Ineffective efforts can decrease intrathoracic pressure, but double cycling can increase it. Thus, asynchronies can lower the predictive accuracy of some hemodynamic parameters of fluid responsiveness. New research is also exploring the psychological effects of asynchronies. Anxiety and depression are common in survivors of critical illness long after discharge. Patients on mechanical ventilation feel anxiety, fear, agony, and insecurity, which can worsen in the presence of asynchronies. Asynchronies have been associated with worse overall prognosis, but the direct causal relation between poor patient-ventilator interaction and worse outcomes has yet to be clearly demonstrated. Critical care patients generate huge volumes of data that are vastly underexploited. New monitoring systems can analyze waveforms together with other inputs, helping us to detect, analyze, and even predict asynchronies. Big data approaches promise to help us understand asynchronies better and improve their diagnosis and management. CONCLUSIONS Although our understanding of asynchronies has increased in recent years, many questions remain to be answered. Evolving concepts in asynchronies, lung crosstalk with other organs, and the difficulties of data management make more efforts necessary in this field.
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Affiliation(s)
- Candelaria de Haro
- Critical Care Center, Hospital Universitari Parc Taulí, Institut d'Investigació i Innovació Parc Taulí I3PT, Universitat Autònoma de Barcelona, Parc Taulí 1, 08208, Sabadell, Spain. .,CIBERES, Instituto de Salud Carlos III, Madrid, Spain.
| | - Ana Ochagavia
- Critical Care Center, Hospital Universitari Parc Taulí, Institut d'Investigació i Innovació Parc Taulí I3PT, Universitat Autònoma de Barcelona, Parc Taulí 1, 08208, Sabadell, Spain.,CIBERES, Instituto de Salud Carlos III, Madrid, Spain
| | - Josefina López-Aguilar
- Critical Care Center, Hospital Universitari Parc Taulí, Institut d'Investigació i Innovació Parc Taulí I3PT, Universitat Autònoma de Barcelona, Parc Taulí 1, 08208, Sabadell, Spain.,CIBERES, Instituto de Salud Carlos III, Madrid, Spain
| | - Sol Fernandez-Gonzalo
- Critical Care Center, Hospital Universitari Parc Taulí, Institut d'Investigació i Innovació Parc Taulí I3PT, Universitat Autònoma de Barcelona, Parc Taulí 1, 08208, Sabadell, Spain.,CIBERSAM, Instituto de Salud Carlos III, Madrid, Spain
| | - Guillem Navarra-Ventura
- Critical Care Center, Hospital Universitari Parc Taulí, Institut d'Investigació i Innovació Parc Taulí I3PT, Universitat Autònoma de Barcelona, Parc Taulí 1, 08208, Sabadell, Spain
| | - Rudys Magrans
- Critical Care Center, Hospital Universitari Parc Taulí, Institut d'Investigació i Innovació Parc Taulí I3PT, Universitat Autònoma de Barcelona, Parc Taulí 1, 08208, Sabadell, Spain.,CIBERES, Instituto de Salud Carlos III, Madrid, Spain
| | | | - Lluís Blanch
- Critical Care Center, Hospital Universitari Parc Taulí, Institut d'Investigació i Innovació Parc Taulí I3PT, Universitat Autònoma de Barcelona, Parc Taulí 1, 08208, Sabadell, Spain.,CIBERES, Instituto de Salud Carlos III, Madrid, Spain
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Conti G, Spinazzola G, Gregoretti C, Ferrone G, Cortegiani A, Festa O, Piastra M, Tortorolo L, Costa R. Comparative bench study evaluation of different infant interfaces for non-invasive ventilation. BMC Pulm Med 2018; 18:57. [PMID: 29625596 PMCID: PMC5889592 DOI: 10.1186/s12890-018-0620-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 03/29/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To compare, in terms of patient-ventilator interaction and performance, a new nasal mask (Respireo, AirLiquide, FR) with the Endotracheal tube (ET) and a commonly used nasal mask (FPM, Fisher and Paykel, NZ) for delivering Pressure Support Ventilation (PSV) in an infant model of Acute Respiratory Failure (ARF). METHODS An active test lung (ASL 5000) connected to an infant mannequin through 3 different interfaces (Respireo, ET and FPM), was ventilated with a standard ICU ventilator set in PSV. The test lung was set to simulate a 5.5 kg infant with ARF, breathing at 50 and 60 breaths/min). Non-invasive ventilation (NIV) mode was not used and the leaks were nearly zero. RESULTS The ET showed the shortest inspiratory trigger delay and pressurization time compared to FPM and Respireo (p < 0.01). At each respiratory rate tested, the FPM showed the shortest Expiratory trigger delay compared to ET and Respireo (p < 0.01). The Respireo presented a lower value of Inspiratory pressure-time product and trigger pressure drop than ET (p < 0.01), while no significant difference was found in terms of pressure-time product at 300 and 500 ms. During all tests, compared with the FPM, ET showed a significantly higher tidal volume (VT) delivered (p < 0.01), while Respireo showed a trend toward an increase of tidal volume delivered compared with FPM. CONCLUSIONS The ET showed a better patient-ventilator interaction and performance compared to both the nasal masks. Despite the higher internal volume, Respireo showed a trend toward an increase of the delivered tidal volume; globally, its efficiency in terms of patient-ventilator interaction was comparable to the FPM, which is the infant NIV mask characterized by the smaller internal volume among the (few) models on the market.
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Affiliation(s)
- Giorgio Conti
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Giorgia Spinazzola
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Cesare Gregoretti
- Department of Biopathology and Medical Biotechnologies (DIBIMED), Section of Anesthesia, Analgesia, Intensive Care and Emergency. Policlinico Paolo Giaccone, University of Palermo, Via del vespro 129, 90127, Palermo, Italy
| | - Giuliano Ferrone
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Andrea Cortegiani
- Department of Biopathology and Medical Biotechnologies (DIBIMED), Section of Anesthesia, Analgesia, Intensive Care and Emergency. Policlinico Paolo Giaccone, University of Palermo, Via del vespro 129, 90127, Palermo, Italy.
| | - Olimpia Festa
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Marco Piastra
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Luca Tortorolo
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Roberta Costa
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
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Longhini F, Pan C, Xie J, Cammarota G, Bruni A, Garofalo E, Yang Y, Navalesi P, Qiu H. New setting of neurally adjusted ventilatory assist for noninvasive ventilation by facial mask: a physiologic study. Crit Care 2017; 21:170. [PMID: 28683763 PMCID: PMC5501553 DOI: 10.1186/s13054-017-1761-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 06/19/2017] [Indexed: 11/10/2022] Open
Abstract
Background Noninvasive ventilation (NIV) is generally delivered using pneumatically-triggered and cycled-off pressure support (PSP) through a mask. Neurally adjusted ventilatory assist (NAVA) is the only ventilatory mode that uses a non-pneumatic signal, i.e., diaphragm electrical activity (EAdi), to trigger and drive ventilator assistance. A specific setting to generate neurally controlled pressure support (PSN) was recently proposed for delivering NIV by helmet. We compared PSN with PSP and NAVA during NIV using a facial mask, with respect to patient comfort, gas exchange, and patient-ventilator interaction and synchrony. Methods Three 30-minute trials of NIV were randomly delivered to 14 patients immediately after extubation to prevent post-extubation respiratory failure: (1) PSP, with an inspiratory support ≥8 cmH2O; (2) NAVA, adjusting the NAVA level to achieve a comparable peak EAdi (EAdipeak) as during PSP; and (3) PSN, setting the NAVA level at 15 cmH2O/μV with an upper airway pressure (Paw) limit to obtain the same overall Paw applied during PSP. We assessed patient comfort, peak inspiratory flow (PIF), time to reach PIF (PIFtime), EAdipeak, arterial blood gases, pressure-time product of the first 300 ms (PTP300-index) and 500 ms (PTP500-index) after initiation of patient effort, inspiratory trigger delay (DelayTR-insp), and rate of asynchrony, determined as asynchrony index (AI%). The categorical variables were compared using the McNemar test, and continuous variables by the Friedman test followed by the Wilcoxon test with Bonferroni correction for multiple comparisons (p < 0.017). Results PSN significantly improved patient comfort, compared to both PSP (p = 0.001) and NAVA (p = 0.002), without differences between the two latter (p = 0.08). PIF (p = 0.109), EAdipeak (p = 0.931) and gas exchange were similar between modes. Compared to PSP and NAVA, PSN reduced PIFtime (p < 0.001), and increased PTP300-index (p = 0.004) and PTP500-index (p = 0.001). NAVA and PSN significantly reduced DelayTR-insp, as opposed to PSP (p < 0.001). During both NAVA and PSN, AI% was <10% in all patients, while AI% was ≥10% in 7 patients (50%) with PSP (p = 0.023 compared with both NAVA and PSN). Conclusions Compared to both PSP and NAVA, PSN improved comfort and patient-ventilator interaction during NIV by facial mask. PSN also improved synchrony, as opposed to PSP only. Trial registration ClinicalTrials.gov, NCT03041402. Registered (retrospectively) on 2 February 2017.
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Affiliation(s)
- Federico Longhini
- Anesthesia and Intensive Care, Sant'Andrea Hospital, ASL VC, Vercelli, Italy
| | - Chun Pan
- Department of Critical Care Medicine, Nanjing Zhong-Da Hospital, Southeast University School of Medicine, 87 Dingjiaqiao Road, Nanjing, 210009, China
| | - Jianfeng Xie
- Department of Critical Care Medicine, Nanjing Zhong-Da Hospital, Southeast University School of Medicine, 87 Dingjiaqiao Road, Nanjing, 210009, China
| | - Gianmaria Cammarota
- Anesthesia and Intensive Care, "Maggiore della Carità" Hospital, Novara, Italy
| | - Andrea Bruni
- Intensive Care Unit, University Hospital Mater Domini, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Eugenio Garofalo
- Intensive Care Unit, University Hospital Mater Domini, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Yi Yang
- Department of Critical Care Medicine, Nanjing Zhong-Da Hospital, Southeast University School of Medicine, 87 Dingjiaqiao Road, Nanjing, 210009, China
| | - Paolo Navalesi
- Intensive Care Unit, University Hospital Mater Domini, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Haibo Qiu
- Department of Critical Care Medicine, Nanjing Zhong-Da Hospital, Southeast University School of Medicine, 87 Dingjiaqiao Road, Nanjing, 210009, China.
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Sun Q, Liu L, Pan C, Zhao Z, Xu J, Liu A, Qiu H. Effects of neurally adjusted ventilatory assist on air distribution and dead space in patients with acute exacerbation of chronic obstructive pulmonary disease. Crit Care 2017; 21:126. [PMID: 28578708 PMCID: PMC5455203 DOI: 10.1186/s13054-017-1714-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 05/09/2017] [Indexed: 11/16/2022]
Abstract
Background Neurally adjusted ventilatory assist (NAVA) could improve patient-ventilator interaction; its effects on ventilation distribution and dead space are still unknown. The aim of this study was to evaluate the effects of varying levels of assist during NAVA and pressure support ventilation (PSV) on ventilation distribution and dead space in patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD). Methods Fifteen mechanically ventilated patients with AECOPD were included in the study. The initial PSV levels were set to 10 cmH2O for 10 min. Thereafter, the ventilator mode was changed to NAVA for another 10 min with the same electrical activity of the diaphragm as during PSV. Furthermore, the ventilation mode was switched between PSV and NAVA every 10 min in the following order: PSV 5 cmH2O; NAVA 50%; PSV 15 cmH2O; and NAVA 150% (relative to the initial NAVA support level). Ventilation distribution in the lung was evaluated in percentages in regions of interest (ROI) of four anteroposterior segments of equal height (ROI1 to ROI4 represents ventral, mid-ventral, mid-dorsal, and dorsal, respectively). Blood gases, ventilation distribution (electrical impedance tomography), diaphragm activity (B-mode ultrasonography), and dead space fraction (PeCO2 and PaCO2) were measured. Results The trigger and cycle delays were lower during NAVA than during PSV. The work of trigger was significantly lower during NAVA compared to PSV. The diaphragm activities based on ultrasonography were higher during NAVA compared to the same support level during PSV. The ventilation distribution in ROI4 increased significantly (P < 0.05) during NAVA compared to PSV (except for a support level of 50%). Similar results were found in ROI3 + 4. NAVA reduced dead space fraction compared to the corresponding support level of PSV. Conclusions NAVA was superior to PSV in AECOPD for increasing ventilation distribution in ROI4 and reducing dead space. Trial registration Clinicaltrials.gov, NCT02289573. Registered on 12 November 2014.
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Affiliation(s)
- Qin Sun
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, Jiangsu, China
| | - Ling Liu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, Jiangsu, China
| | - Chun Pan
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, Jiangsu, China
| | - Zhanqi Zhao
- Institute of Technical Medicine, Furtwangen University, Villingen-Schwenningen, Germany
| | - Jingyuan Xu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, Jiangsu, China
| | - Airan Liu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, Jiangsu, China
| | - Haibo Qiu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, Jiangsu, China.
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11
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Abstract
Noninvasive ventilation (NIV) is frequently used in the NICU to avoid intubation or as postextubation support for spontaneously breathing infants experiencing respiratory distress. Neurally adjusted ventilatory assist (NAVA) is used as a mode of noninvasive support in which both the timing and degree of ventilatory assist are controlled by the patient. NIV-NAVA has been successfully used clinically in neonates as a mode of ventilation to prevent intubation, allow early extubation, and as a novel way to deliver nasal continuous positive airway pressure.
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Affiliation(s)
- Kimberly S Firestone
- Neonatal Respiratory Outreach Clinical Liaison, Neonatal Intensive Care Unit, Neonatology Department, Akron Children's Hospital, One Perkins Square, Akron, OH 44308, USA
| | - Jennifer Beck
- Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Department of Pediatrics, University of Toronto, 30 Bond Street, Toronto, ON M5B 1W8, Canada; Institute for Biomedical Engineering and Science Technology (iBEST), Ryerson University and St. Michael's Hospital, Department of Chemistry and Biology, 350 Victoria Street, Toronto, ON M5B 2K3, Canada
| | - Howard Stein
- Neonatal Intensive Care Unit, Promedica Toledo Children's Hospital, Department of Pediatrics, 2142 North Cove Boulevard, Toledo, OH 43606, USA; University of Toledo, Department of Pediatrics, University of Toledo Health Science Campus, 3000 Arlington Avenue, Toledo, OH 43614, USA.
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Delgado M, Zavala E, Tomás R, Fernandez R. Clinical factors associated with success of proportional assist ventilation in the acute phase of critical illness: pilot study. Med Intensiva 2013; 38:65-72. [PMID: 24035698 DOI: 10.1016/j.medin.2013.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2013] [Revised: 05/03/2013] [Accepted: 07/09/2013] [Indexed: 10/26/2022]
Abstract
REASON Proportional assist ventilation plus (PAV+) applies pressure depending on the patient's inspiratory effort, automatically adjusting flow and volume assist to changes in respiratory mechanics. We aimed to assess the clinical factors associated with the success of PAV+ as first-line support in the acute phase of critical illness. METHODS A prospective cohort study was carried out. Mechanically ventilated patients>24h were switched from assist-control ventilation to PAV+ as soon as they regained spontaneous breathing activity. PAV+ was set to deliver the highest assistance. We compared patients in whom PAV+ succeeded versus those in whom it failed. RESULTS PAV+ succeeded in 12 (63%) patients, but failed in 7 (37%) due to tachypnea (n=4), hypercapnia (n=2), and metabolic acidosis (n=1), but without statistical significance. Both groups had similar clinical parameters. On the day of inclusion, total work of breathing per breath was lower in the successful PAV+ group (WOBTOT: 0.95 [0.8-1.35] vs. 1.6 [1.4-1.8] J/L; P<.007). The area under the ROC curve was 0.89 ± 0.08 for WOBTOT. The best cut-off for predicting PAV+ success was WOBTOT<1.4 J/L (sensitivity: 1 [0.7-1], specificity: 0.6 [0.4-0.6], PPV: 0.7 [0.5-0.7], and NPV: 1 [0.6-1]). CONCLUSION PAV+ proved feasible as first-line ventilatory support in 63% of the patients, mostly in individuals without extreme derangements in WOBTOT. Tachypnea and hypercapnia were the clinical factors associated with failure, though statistical significance was not reached.
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Affiliation(s)
- M Delgado
- Servicio de Medicina Intensiva, Universitätsklinik für Intensivmedizin, Inselspital, Universitätsspital Bern, Berna, Suiza.
| | - E Zavala
- Sección UCI Quirúrgica, Hospital Clínic, Barcelona, España
| | - R Tomás
- Servicio de Medicina Intensiva, Hospital General de Cataluña, Sant Cugat del Vallès, Barcelona, España
| | - R Fernandez
- Servicio de Medicina Intensiva, Hospital Sant Joan de Déu, Fundació Althaia, Manresa, Barcelona, España; Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Madrid, España; Universitat Internacional de Catalunya, Barcelona, España
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