Questa pagina è stata tradotta automaticamente e l'accuratezza della traduzione non è garantita. Si prega di fare riferimento al Versione inglese per un testo di partenza.

Selecting the Best Ventilator Hyperinflation Settings (VHI1)

27 ottobre 2017 aggiornato da: Fernando Silva Guimaraes, Centro Universitário Augusto Motta

Selecting the Best Ventilator Hyperinflation Settings Based on Physiologic Markers: Randomized Controlled Study

Ventilator hyperinflation (VHI) has been shown to be effective in improving respiratory mechanics, secretion removal, and gas exchange in mechanically ventilated patients; however, there are no recommendations on the best ventilator settings to perform the technique. Thus, the aim of this study was to compare six modes of VHI, concerning physiological markers of efficacy and safety criteria, in order to support the optimal VHI settings selection for mechanically ventilated patients. In a randomized, controlled and crossover study, 30 mechanically ventilated patients underwent 6 modes of ventilator hyperinflation. The maximum expansion (tidal volume), expiratory flow bias criteria (inspiratory and expiratory flow patterns), overdistension (alveolar pressure), asynchronies and hemodynamic variables (mean arterial pressure and heart rate) were assessed during the interventions.

Panoramica dello studio

Stato

Completato

Condizioni

Intervento / Trattamento

Descrizione dettagliata

Background: Ventilator Hyperinflation (VHI) has been shown to be effective in improving respiratory mechanics, secretion removal, and gas exchange in mechanically ventilated patients; however, there are no recommendations on the best ventilator settings to perform the technique. Thus, the aim of this study was to compare six modes of VHI, concerning physiological markers of efficacy and safety criteria, in order to support the optimal VHI settings selection for mechanically ventilated patients.

Methods: In a crossover study, every included mechanically ventilated patient underwent six modes of VHI in a randomized order: Volume Control Continuous Mandatory Ventilation (VC-CMV) with inspiratory flow = 20Lpm (VC-CMV20), VC-CMV with inspiratory flow = 50Lpm (VC-CMV50), Pressure Control Continuous Mandatory Ventilation (PC-CMV) with inspiratory time = 1s. (PC-CMV1), PC-CMV with inspiratory time = 3s. (PC-CMV3), Pressure Support Ventilation (PSV) with cycling off = 10% of peak inspiratory flow (PSV10), and PSV with cycling off = 25% of peak inspiratory flow (PSV25). The maximum expansion (tidal volume), expiratory flow bias criteria (inspiratory and expiratory flow patterns), over-distension (alveolar pressure), asynchronies and hemodynamic variables (mean arterial pressure and heart rate) were assessed during the interventions.

Tipo di studio

Interventistico

Iscrizione (Effettivo)

30

Fase

  • Non applicabile

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 18 anni a 65 anni (Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria:

  • Patients under mechanical ventilation for more than 48h

Exclusion Criteria:

  • mucus hypersecretion (defined as the need for suctioning < 2-h intervals),
  • absence of respiratory drive,
  • atelectasis,
  • severe bronchospasm,
  • positive end expiratory pressure > 10cmH2O,
  • PaO2-FiO2 relationship < 150,
  • mean arterial pressure < 60mmHg,
  • inotrope requirement equivalent to >15 ml/h total of adrenaline and noradrenalin,
  • intracranial pressure > 20mmHg

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione incrociata
  • Mascheramento: Separare

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Nessun intervento: BASELINE
The subjects were kept in their current ventilatory mode.
Sperimentale: VC-CMV20
Application of a ventilator hyperinflation intervention with Volume Control Continuous Mandatory Ventilation (VC-CMV) with an inspiratory flow of 20Lpm.
Altro: VC-CMV20
Application of a ventilator hyperinflation intervention with Volume Control Continuous Mandatory Ventilation (VC-CMV). The inspiratory flow was set at 20Lpm and the tidal volume was increased in steps of 200mL until the peak airway pressure of 40cmH2O was achieved. After achieving the target pressure, this ventilatory regimen lasted 15 minutes. Positive end expiratory pressure and the inspired oxygen fraction were not modified.
Sperimentale: VC-CMV50
Application of a ventilator hyperinflation intervention with Volume Control Continuous Mandatory Ventilation (VC-CMV) with an inspiratory flow of 50Lpm.
Altro: VC-CMV50
Application of a ventilator hyperinflation intervention with Volume Control Continuous Mandatory Ventilation (VC-CMV). The inspiratory flow was set at 50Lpm and the tidal volume was increased in steps of 200mL until the peak airway pressure of 40cmH2O was achieved. After achieving the target pressure, this ventilatory regimen lasted 15 minutes. Positive end expiratory pressure and the inspired oxygen fraction were not modified.
Sperimentale: PC-CMV1
Application of a ventilator hyperinflation intervention with Pressure Control Continuous Mandatory Ventilation (PC-CMV1) with an inspiratory time of 1 second.
Altro: PC-CMV1
Application of a ventilator hyperinflation intervention with Pressure Control Continuous Mandatory Ventilation (PC-CMV1). The inspiratory time was set at 1 second and the pressure control was increased until a peak pressure of 40cmH2O was achieved. After achieving the target pressure, this ventilatory regimen lasted 15 minutes. Positive end expiratory pressure and the inspired oxygen fraction were not modified.
Sperimentale: PC-CMV3
Application of a ventilator hyperinflation intervention with Pressure Control Continuous Mandatory Ventilation (PC-CMV1) with an inspiratory time of 3 seconds.
Altro: PC-CMV3
Application of a ventilator hyperinflation intervention with Pressure Control Continuous Mandatory Ventilation (PC-CMV1). The inspiratory time was set at 3 seconds and the pressure control was increased until a peak pressure of 40cmH2O was achieved. After achieving the target pressure, this ventilatory regimen lasted 15 minutes. Positive end expiratory pressure and the inspired oxygen fraction were not modified.
Sperimentale: PSV10
Application of a ventilator hyperinflation intervention with Pressure Support Ventilation (PSV) with a cycling off of 10% of peak inspiratory flow.
Altro: PSV10
Application of a ventilator hyperinflation intervention with Pressure Support Ventilation (PSV). The cycling off was set at 10% of peak inspiratory flow and the pressure support was increased until a peak pressure of 40cmH2O was achieved. After achieving the target pressure, this ventilatory regimen lasted 15 minutes. Positive end expiratory pressure and the inspired oxygen fraction were not modified.
Sperimentale: PSV25
Application of a ventilator hyperinflation intervention with Pressure Support Ventilation (PSV) with a cycling off of 25% of peak inspiratory flow.
Altro: PSV25
Application of a ventilator hyperinflation intervention with Pressure Support Ventilation (PSV). The cycling off was set at 25% of peak inspiratory flow and the pressure support was increased until a peak pressure of 40cmH2O was achieved. After achieving the target pressure, this ventilatory regimen lasted 15 minutes. Positive end expiratory pressure and the inspired oxygen fraction were not modified.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Peak inspiratory to expiratory flow ratio
Lasso di tempo: Ten minutes after the onset of intervention.
Dichotomous variable, defined as achieving a peak inspiratory flow rate (PIFR) less than 90% of the peak expiratory flow rate (PEFR)
Ten minutes after the onset of intervention.
Peak expiratory flow higher than 40 Lpm
Lasso di tempo: Ten minutes after the onset of intervention.
Dichotomous variable, defined as achieving a PEFR higher than 40 l/min
Ten minutes after the onset of intervention.
Difference between peak inspiratory and expiratory flows.
Lasso di tempo: Ten minutes after the onset of intervention.
Dichotomous variable, defined as achieving a difference higher than 17Lpm.
Ten minutes after the onset of intervention.
Pulmonary expansion
Lasso di tempo: Ten minutes after the onset of intervention.
Percentage of tidal volume above the normal tidal volume (estimated as 6mL/kg).
Ten minutes after the onset of intervention.

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Mean arterial pressure
Lasso di tempo: Ten minutes after the onset of intervention.
Mean arterial pressure verified using the multi-parameter monitor.
Ten minutes after the onset of intervention.
Heart Rate
Lasso di tempo: Ten minutes after the onset of intervention.
Heart rate verified using the multi-parameter monitor.
Ten minutes after the onset of intervention.

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Centro Universitário Augusto Motta

Collaboratori

Universidade Federal do Rio de Janeiro

Investigatori

  • Cattedra di studio: FERNANDO S GUIMARAES, PhD, Centro Universitário Augusto Motta

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Pubblicazioni generali

Collegamenti utili

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

1 luglio 2016

Completamento primario (Effettivo)

1 agosto 2017

Completamento dello studio (Effettivo)

1 agosto 2017

Date di iscrizione allo studio

Primo inviato

27 ottobre 2017

Primo inviato che soddisfa i criteri di controllo qualità

27 ottobre 2017

Primo Inserito (Effettivo)

31 ottobre 2017

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

31 ottobre 2017

Ultimo aggiornamento inviato che soddisfa i criteri QC

27 ottobre 2017

Ultimo verificato

1 ottobre 2017

Maggiori informazioni

Termini relativi a questo studio

Parole chiave

Termini MeSH pertinenti aggiuntivi

Altri numeri di identificazione dello studio

  • VHI1

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

Prove cliniche su Disturbi respiratori

Prove cliniche su VC-CMV20

Cerca prove simili

Sponsor e collaboratori

Condizioni mediche

Interventi farmacologici

CROs by country

CROs in Tunisia

Condizioni

Malattie rare

Interventi farmacologici

Supplementi dietetici

Sponsor / Collaboratori

Sedi

Sottoscrivi