ClinicalTrials.gg
Status unknownNCT03464071Updated Jul 31, 2019

Biomarkers of Lung Injury in Hyperinflation in the Mechanical Ventilator Versus Manual Hyperinflation

An interventional study of Hyperinflation with mechanical ventilator and Manual hyperinflation in Sepsis, sponsored by Hospital de Clinicas de Porto Alegre. Status unknown at 1 site in Brazil. Per ClinicalTrials.gov, last updated 2019-07-31.

Sponsored by Hospital de Clinicas de Porto Alegre · Not applicable, Interventional, and Diagnostic

The sponsor has not verified this record recently (last verified Mar 2019), so the status shown — last known as Recruiting — may be out of date.

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Phase
Not applicable
Study type
Interventional
Enrollment
30
Allocation
Randomized
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 49 studies in Sepsis with a site in Brazil — 4 open to participants now, 6 under way, 1 of them phase 3. Sepsis · Brazil.

Planned enrollment
36th of 39
30 · median 152
Started
2018
with 4 others
No phase
12 of 49
1 open now
Registered
31st of 49
by date
Lead sponsor
3 of 49
Hospital de Clinicas de Porto Alegre

Among the 49 studies in Sepsis with a site in Brazil, this one is the 36th largest by planned enrollment of the 39 interventional ones that give a count, is one of 5 that started in 2018, is one of 12 with no phase, and was the 31st registered.

Sepsis

2,417 studies on the registry are indexed under Sepsis; 542 are open to participants now.

Browse Sepsis studies →

Open to participants now

4 of the 49 studies in Sepsis with a site in Brazil are open now. Recruiting first, the newest first:

All 4 open studies →

A study can be open while its sites in Brazil have not opened yet or have stopped. Only those recruiting at a site in Brazil →

Who these studies take

Of the 318 Sepsis studies recruiting now, 213 (67%) set no upper age limit and 53 (17%) stop at 75 or younger; 68 take children under 18; 42 take healthy volunteers.

This study: all sexes · no healthy volunteers.

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02

Study summary

Due to the failure of the respiratory system, many patients admitted to the Intensive Care Units (ICUs) require the institution of invasive mechanical ventilation (MV), aiming at maintaining gas exchange, reversing respiratory muscle fatigue, among other benefits. However, an artificial airway installation may be harmful because of its deleterious capacity to the mucociliary clearance mechanism, predisposing to the accumulation of secretions and consequent respiratory infections. Physiotherapy in patients critical for the purpose of preventing and treating these respiratory complications. In this way, they are techniques that aim at a reexpansion and removal of airborne secretions. An application of manual hyperinflation with the Ambú (HM), applied through compression of the resuscitator (Ambu), an application of hypertension for the use of energy, pulmonary volume. Similar to the goal of manual hyperinflation, a hyperinflation maneuver without mechanical ventilator (HVM) is also widely used and has been shown to be effective. A maneuvering visa re-expansion of collapsed lung areas and increased peak expiratory flow, resulting in the mobilization of secretions. It is known that these techniques can cause deleterious effects to the lungs due to the high volumes administered and the variation in airway depression, predisposing to barotrauma and volutrauma, increasing the lung permeability and consequent pulmonary edema. There may also be a more subtle form of injury, such as a release of lung mediators, initiating a process of local inflammation. This biological response is called biotrauma, and if these mediators translocate into the systemic circulation, it can lead to dysfunction and death. The aim of the present study was to evaluate the biomarkers of pulmonary lesion in the hyperinflation maneuver with mechanical ventilator versus manual hyperinflation with environments in sudden patients under mechanical ventilation.

Read the detailed description

This study aims to evaluate the biomarkers of lung injury in the hyperinflation maneuver with mechanical ventilator versus manual hyperinflation with ambu in septic patients under mechanical ventilation through changes in the cellular levels of interleukin 8 (IL-8) and receptor for advanced glycation end products (RAGE). As specific objectives, compare the variables of ventilatory mechanics (dynamic compliance, static complacency, frequency airway resistance) and hemodynamic parameters (systolic blood pressure, diastolic blood pressure, mean arterial pressure and heart rate) before and after each maneuver and between groups. It is characterized as a randomized clinical trial. The binary randomization of the groups will be performed using the electronic application Bracket RTSM (version 2.0.0, Bracket Global), and will be performed by a blind researcher to the groups evaluated. After the eligibility criteria, the selected patients will be randomized and divided into two groups : Hyperinflation group with mechanical ventilator (HVM) and manual hyperinflation group (HM). Triage will be carried out daily in order to detect patients eligible to apply the study through communication with the local multiprofessional team. Once patients are eligible according to the inclusion and exclusion criteria, randomization will be performed to determine the techniques to be employed. Prior to the application of each technique, all patients will be placed in the dorsal decubitus (DD) with the head elevated at 30 degrees and will be aspirated by the nursing team once with probe number nº 14 and with a vacuum of -40cmH2O. Five minutes later, a 4.5 mL blood sample from the study participant for analysis of lung injury biomarkers (IL-8 and RAGE) will be collected in an EDTA tube. Blood samples will be sent to the Molecular and Protein Analysis Unit (UAMP) of the HCPA Experimental Research Center (CPE) in a box cooled by a blind collaborator who is not part of the study and will be stored at -80ºC. The biomarkers will be tested in duplicates through the plasma of the sample collected using the Luminex Human Magnetic Assay kit (R \& DSystems, Minneapolis, MN). The results will be transcribed to the datasheet. A period of five minutes will be waited for the start of the initial technique chosen by randomization. When drawn to the HVM group, there will be an increase in initial positive inspiratory pressure until reaching a peak pressure of 40 cmH2O and PEEP equal to 7 cmH2O. During the application of this technique VC will increase significantly in most patients, which may cause and / or increase Auto-PEEP. In order to minimize and / or extinguish this adverse effect the RF should be reduced to allow exhalation. When drawn to the HM group, the manual resuscitation bag will be connected to the oxygen system at five liters per minute. The participant will be disconnected from the ventilator and then initiate a slow inspiration with inspiratory pause followed by abrupt expiration, totaling twelve (12) cycles / minute. Data will be collected on ventilatory mechanics (dynamic compliance, expiratory tidal volume, respiratory rate, peak pressure, plateau pressure, airway resistance) from the ventilator used in the SERVO-s® institution and hemodynamic parameters (systolic blood pressure, diastolic blood pressure, mean arterial pressure and heart rate) in the hemodynamic monitoring device MP60® before and after the application of each technique, and the data will be recorded on an evaluation form. After each maneuver, a period of three hours will be waiting and then a blood sample will be collected again from the patient for the analysis of lung injury biomarkers.

03

Conditions studied

  • Sepsis

Keywords

  • sepsis
  • biomarkers
  • lung injury
04

Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • All patients admitted to the ICPA ICU who have a minimum of 24 hours under mechanical ventilation, coupled to the orotracheal tube (TOT) or tracheostomy (TQT) in pressure-controlled ventilation (PCV) or volume-controlled ventilation (VCV) .
  • Hemodynamically stable patients with mean arterial pressure equal to or greater than 60 mmHg with Noradrenaline doses of less than 0.5 μg / kg / minute.
  • Septic patients.

Exclusion criteria

Exclusion Criteria:

  • Patients with to increased positive pressure (non-drained pneumothorax and hemothorax, subcutaneous emphysema).
  • Patients with a diagnosis of adult respiratory distress syndrome (ARDS).
  • Neurosurgical patients who are under intracranial pressure monitoring (ICP);
  • Patients with Peak inspiratory pressure (PIP) = 40 cmH2O and / or PEEP> 10 cmH2O.
  • Post-surgical patients
  • Patients submitted to extracorporeal circulation (ECC)
  • Chronic renal patients
  • Patients without relatives.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

05

Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Care provider)
Enrollment
30 participants (estimated)

Study arms

  • Experimental
    Group HVM

    When randomized to the Hyperinflation with mechanical ventilator (HVM) group, there will be an increase in initial positive inspiratory pressure until reaching a peak pressure of 40 cmH2O and PEEP equal to 7 cmH2O

    Device: Hyperinflation with mechanical ventilator

  • Experimental
    Group HM

    When randomized to the Manual hyperinflation (HM) group, the manual resuscitation bag will be connected to the oxygen system at five liters per minute. The participant will be disconnected from the ventilator and then initiate a slow inspiration with inspiratory pause followed by abrupt expiration, totaling twelve (12) cycles / minute.

    Device: Manual hyperinflation

Interventions

  • DeviceHyperinflation with mechanical ventilator

    increase in initial positive inspiratory pressure until reaching a peak pressure of 40 cmH2O and PEEP equal to 7 cmH2O

  • DeviceManual hyperinflation

    the manual resuscitation bag will be connected to the oxygen system at five liters per minute. The participant will be disconnected from the ventilator and then initiate a slow inspiration with inspiratory pause followed by abrupt expiration, totaling twelve (12) cycles / minute.

06

What researchers measure

Primary outcomes

  1. Interleukin 8 (IL-8)

    A sample of 4.5 mL of blood from the study participant for analysis of lung injury biomarkers will be collected in an EDTA tube and then analyzed using the Luminex Human Magnetic Assay kit

    Time frame: variation in 3 hours

  2. Receptor for advanced glycation end products (RAGE)

    A sample of 4.5 mL of blood from the study participant for analysis of lung injury biomarkers will be collected in an EDTA tube and then analyzed using the Luminex Human Magnetic Assay kit

    Time frame: variation in 3 hours

Secondary outcomes

  1. Systolic blood pressure

    will be verified through the Philips MP60® hemodynamic monitoring device

    Time frame: variation in 3 hours

  2. Diastolic blood pressure

    will be verified through the Philips MP60® hemodynamic monitoring device

    Time frame: variation in 3 hours

  3. Heart rate

    will be verified through the Philips MP60® hemodynamic monitoring device

    Time frame: variation in 3 hours

  4. Mean arterial pressure

    will be verified through the Philips MP60® hemodynamic monitoring device

    Time frame: variation in 3 hours

  5. Respiratory rate

    value obtained from the ventilator used in the institution SERVO-s®

    Time frame: variation in 3 hours

  6. Dynamic compliance (cdyn)

    value obtained from the ventilator used in the institution SERVO-s®

    Time frame: variation in 3 hours

  7. Static compliance (cst)

    value obtained from the ventilator used in the institution SERVO-s®

    Time frame: variation in 3 hours

  8. Peak inspiratory pressure (PIP)

    value obtained from the ventilator used in the institution SERVO-s®

    Time frame: variation in 3 hours

  9. Plateau pressure (PP)

    value obtained from the ventilator used in the institution SERVO-s®

    Time frame: variation in 3 hours

  10. Airway resistance (Raw)

    value obtained from the ventilator used in the institution SERVO-s®

    Time frame: variation in 3 hours

07

Study locations

1 of 1 sites recruiting
  • Hospital de Clínicas de Porto Alegre
    Porto Alegre, Rio Grande Do Sul 90035903, Brazil
    Recruiting
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Mar 2018 (actual). Primary completion is estimated for Sep 2019, 17 months after the start.

Of 301 non-industry interventional studies with no phase under Sepsis, half reached primary completion within 23 months of starting (the median), counting those still running; a quarter within 12 and three quarters within 42. This study's planned 17 months is below that.

Counting every sponsor, half of 324 studies reached it within 22 months; a quarter within 12 and three quarters within 40.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 7, 2018
First posted
Mar 13, 2018
StartActual
Mar 23, 2018
Primary completionEst.
Sep 10, 2019
CompletionEst.
Dec 20, 2019
Last update
Jul 31, 2019
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jul 31, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT03464071
Responsible party
Sponsor
First posted
Mar 13, 2018
Start date
Mar 23, 2018
Primary completion
Sep 10, 2019 (estimated)
Completion
Dec 20, 2019 (estimated)
Last update
Jul 31, 2019

Study contacts

Nathalia Silva de Oliveira
Contact
nsdoliveira@hcpa.edu.br
+5551993455913
Wagner da Silva Naue
Contact
wnaue@hcpa.edu.br
+5551999767688
Silvia Regina Rios Vieira
principal investigator · Federal University of Rio Grande do Sul

Oversight

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

Not currently enrolling

This study is status unknown, as verified in Mar 2019. You cannot join it, but the record below documents what was studied.

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