CClinicalTrials.gg
RecruitingNCT06357780CHESTSPANUpdated Mar 26, 2025

Closed-loop syncHronization vErsuS convenTional Synchronization in sPontaneously Breathing Adult Nonivasive ventilationPatients

An interventional study of close-loop synchronization controller with spontaneous mode and Conventional in Acute Respiratory Failure, Acute Respiratory Distress Syndrome and Chronic Respiratory Failure, sponsored by Başakşehir Çam & Sakura City Hospital. Recruiting at 1 site in Turkey. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-03-26.

Sponsored by Başakşehir Çam & Sakura City Hospital · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Aug 2025, 1 year 1 month ago, but the record still lists the study as recruiting.
  • Started Apr 2024; still recruiting 2 years 5 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
38
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The study is a multicentric prospective randomised cross-over study. It evaluates the compatibility of patients with the device without altering the routine treatment applied. During this evaluation, either the clinician-adjusted values on the device or the standard pre-set values are used to obtain hourly and 30-minute PVA (Patient Ventilator Asynchrony) recordings. These recordings will be analysed offline to identify the settings used and to compare the hourly and 30-minute PVA (Patient Ventilator Asynchrony) values when synchronisation is automatically set. The relationships and differences between these values will be analysed. For this purpose, the IntelliSync+ option, already available on the device, will be used. This software continuously analyses waveform signals at least a hundred times per second. This allows for the immediate detection of patient efforts and the initiation of inspiration and expiration in real time, thereby replacing traditional trigger settings for inspiration and expiration. If the patient is already synchronised with this option, it will then be possible to switch to traditional synchronisation settings for comparison. Statistical analyses will be conducted using SPSS 24.0, JASP (Just Another Statistical Programme), Jamovi ( fork of JASP), or R software. Initially, all numerical and categorical data will be evaluated using descriptive statistical methods. The distributions of numerical variables will be examined using visual (histograms and probability plots) and analytical methods (Kolmogorov-Smirnov/Shapiro-Wilk tests). Mean/SD (standard deviation) or median/interquartile range (IQR) will be used as measures of distribution. For comparing numerical data that follows a normal distribution, the Student-t test will be used, and for non-normally distributed data, the Mann-Whitney U or Wilcoxon signed-rank tests will be employed. PVA (Patient Ventilator Asynchrony) values will be statistically compared. For the analysis of categorical data, the Chi-Square test will be applied. Bayesian analysis may also be used as necessary during the writing of the study. The results obtained will be interpreted and reported by the researchers. Results with a "p" value below 0.05 will be considered statistically significant.

02

Conditions studied

  • Acute Respiratory Failure
  • Acute Respiratory Distress Syndrome
  • Chronic Respiratory Failure

Keywords

  • Acute respiratory failure (ARF)
  • noninvasive ventilation
  • Closed-loop
  • synchronization
  • patient ventilator asynchrony
03

In context

Respiratory Distress Syndrome

1,597 studies on the registry are indexed under Respiratory Distress Syndrome; 312 are open to participants now.

This study's planned enrollment of 38 is below the median of 60 across 961 interventional studies indexed under Respiratory Distress Syndrome.

Browse Respiratory Distress Syndrome studies →

Lead sponsor

Başakşehir Çam & Sakura City Hospital is the lead sponsor of 105 studies on the registry; 36 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Adult patients older than 18 years of age
  • Hospitalized at the ICU or emergency department with the intention of treatment with Noninvasive ventilation at least for the upcoming 2 hours with spontaneous breathing activity
  • Written informed consent signed and dated by the patient or one relative in case that the patient is unable to consent, after full explanation of the study by the investigator and prior to study participation

Exclusion criteria

Exclusion Criteria:

  • Formalized ethical decision to withhold or withdraw life support
  • Patient included in another interventional research study under consent
  • Patient already enrolled in the present study in a previous episode of respiratory failure
  • Pregnant woman
  • Patients deemed at high risk for the need of transportation from an intensive care unit or emergency department to another ward, diagnostic unit or any other hospital
  • Hemodynamic instability defined as a need of continuous infusion of epinephrine or norepinephrine > 1 mg/h
  • Not being able to obtain reference waveforms due to technical or medical problems
  • Vulnerable population
  • Increase or decrease of ventilatory support either in pressures, fraction of inspired oxygen or mode of ventilation during study period
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Single (Participant)
Enrollment
38 participants (estimated)

Study arms

  • Experimental
    Close-loop synchronization controller

    30 minutes period where the pressure support of spontaneous effort will be automatically titrated based on pressure and flow waveform analysis obtained from the patient during NIV mode.

    Other: close-loop synchronization controller with spontaneous mode

  • Active comparator
    Conventional

    30 minutes period where the synchronization of pressure support of patient effort during NIV mode will be manually set.

    Other: Conventional

Interventions

  • Otherclose-loop synchronization controller with spontaneous mode

    30 minutes period where the pressure support of spontaneous effort will be automatically titrated based on pressure and flow waveform analysis obtained from the patient during NIV mode.

  • OtherConventional

    30 minutes period where the synchronization of pressure support of patient effort during NIV mode will be manually set.

06

What researchers measure

Primary outcomes

  1. Asynchrony Index

    \[(detectable asynchronies )/(total number of breaths + ineffective efforts)\]x100

    Time frame: 30 minutes

Secondary outcomes

  1. Major Asynchrony index

    \[(major asynchronies)/(total number of breaths + ineffective efforts)\]x100

    Time frame: 30 minutes

  2. Minor Asynchrony index

    \[(minor asynchronies)/(total number of breaths + ineffective efforts)\]x100

    Time frame: 30 minutes

  3. Dyspnea Scale

    Patient subjective dyspnea scale

    Time frame: 30 minutes

07

Study locations

1 of 1 sites recruiting
  • Dr.Suat Seren Chest Diseasees Hospital
    Izmir, 35230, Turkey
    • Cenk Kirakli, professor · Contact
    Recruiting
08

References and documents

Publications

  • Thille AW, Rodriguez P, Cabello B, Lellouche F, Brochard L. Patient-ventilator asynchrony during assisted mechanical ventilation. Intensive Care Med. 2006 Oct;32(10):1515-22. doi: 10.1007/s00134-006-0301-8. Epub 2006 Aug 1. PubMed 16896854 ↗
  • Longhini F, Bruni A, Garofalo E, Tutino S, Vetrugno L, Navalesi P, De Robertis E, Cammarota G. Monitoring the patient-ventilator asynchrony during non-invasive ventilation. Front Med (Lausanne). 2023 Jan 19;9:1119924. doi: 10.3389/fmed.2022.1119924. eCollection 2022. PubMed 36743668 ↗
  • Itagaki T, Akimoto Y, Nakano Y, Ueno Y, Ishihara M, Tane N, Tsunano Y, Oto J. Relationships between double cycling and inspiratory effort with diaphragm thickness during the early phase of mechanical ventilation: A prospective observational study. PLoS One. 2022 Aug 17;17(8):e0273173. doi: 10.1371/journal.pone.0273173. eCollection 2022. PubMed 35976965 ↗
  • Xu Z, Sheng D, Jiao K, Zhang C, Hao J, Ma D. Factors affecting abnormal triggering with non-invasive ventilators: A before-and-after study. Clin Respir J. 2022 Jun;16(6):450-459. doi: 10.1111/crj.13497. Epub 2022 May 31. PubMed 35642081 ↗
  • Mojoli F, Pozzi M, Orlando A, Bianchi IM, Arisi E, Iotti GA, Braschi A, Brochard L. Timing of inspiratory muscle activity detected from airway pressure and flow during pressure support ventilation: the waveform method. Crit Care. 2022 Jan 30;26(1):32. doi: 10.1186/s13054-022-03895-4. PubMed 35094707 ↗
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 26, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06357780
Lead sponsor
Başakşehir Çam & Sakura City Hospital
Responsible party
Sponsor
First posted
Apr 10, 2024
Start date
Apr 8, 2024
Primary completion
Aug 30, 2025 (estimated)
Completion
Dec 31, 2025 (estimated)
Last update
Mar 26, 2025

Study contacts

Ramazan Guven, Associate professor
Contact
drramazanguven@gmail.com
05324935995
Tuba Dogan, MD
Contact
dr.tubadogan@hotmail.com
Ramazan Guven, Associate professor
principal investigator · Basaksehir Cam Sakura city Hospital, Istanbul

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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