Inspiratory Effort-Targeted Pressure Support Ventilation (IT-PSV) Trial
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: PMI-targeted pressure support setting and adjustment, VT/RR-targeted pressure support setting and adjustment.
- Who it may be relevant to
- Registry conditions: Critical Care, Acute Hypoxic Respiratory Failure, Ventilator-Induced Lung Injury. Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- China
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
Unsure about the terms? Read our patient guide →
Official title
A Cluster Randomized Trial on Inspiratory Effort-Based Pressure Support Adjustment Strategy in Patients Undergoing Assisted Mechanical Ventilation
Overview
The Inspiratory effort-Targeted Pressure Support Ventilation (IT-PSV) is a cluster randomized controlled trial. Its main aim is to determine whether an inspiratory effort-targeted pressure support setting strategy, compared to the traditional tidal volume and respiratory rate target, can improve clinical outcomes in adult participants undergoing pressure support ventilation. The investigators propose a physiological-oriented assisted ventilation management that, if found effective, could potentially change the clinical practice for mechanical ventilation.
Detailed description
Pressure-support ventilation (PSV) is widely used in the intensive care unit (ICU). The successful implementation of PSV depends on matching the patient's inspiratory effort with the ventilator support. Traditionally, pressure support levels are set according to tidal volume (VT) and respiratory rate (RR). However, previous studies have shown that over-assistance under PSV is not uncommon based on this setting strategy. Pressure muscle index (PMI) is an inspiratory effort monitoring, which can be easily obtained on the ventilator screen at the bedside.
Aim:
The aim is to determine whether an inspiratory effort-targeted pressure support setting strategy, compared to the traditional approach, can improve clinical outcomes in adult participants undergoing PSV.
Design:
This is a two-arm cluster randomized trial in 18 clusters randomized 1:1 to pressure support setting by a PMI-targeted strategy or a traditional VT/RR-targeted strategy.
Population:
Patients with acute hypoxic respiratory failure who have been intubated within seven days and undergoing PSV within 24 hours will be enrolled.
Intervention:
During the study, a general standard of care for mechanical ventilation will be followed, including the transition of control modes to PSV, the principle PSV settings (trigger, cycle-off, fraction of inspired oxygen, and positive end-expiratory pressure), rescue backup of controlled ventilation, performance of spontaneous breathing trial, and weaning and extubation.
In the VT/RR-targeted group, the pressure support is adjusted to obtain a VT between 6 and 8 ml/kg predicted body weight and RR between 20 and 35 breaths/min.
In the PMI-targeted group, the pressure support is adjusted according to the PMI between 0 and 2 cmH2O.
During the study period in the two groups, pressure support adjustment will be performed at least twice daily.
The intervention will be implemented over 24 months.
Training:
After randomization, a four-week comprehensive training program will be conducted for all staff in the participating ICUs before the formal start of the trial.
Outcomes:
The primary outcome is the ventilator free day during 28 days. Secondary outcomes include total duration of mechanical ventilation, the time before the first spontaneous breathing trial, weaning time, frequency of prolonged and failed weaning, frequency of mechanical ventilation longer than 21 days, length of stay in the ICU and hospital, ICU mortality, hospital mortality, and 28-day mortality.
Study sites:
The study will be conducted in 18 ICUs in university-affiliated hospitals in three provinces in China: Beijing, Tianjin, and Hebei.
Interventions
- Procedure PMI-targeted pressure support setting and adjustment
During PSV, the pressure support is set and adjusted to a PMI target between 0 and 2 cmH2O. - Procedure VT/RR-targeted pressure support setting and adjustment
During PSV, pressure support is set and adjusted according to a VT/RR target of VT between 6 and 8 ml/kg predicted body weight, RR between 20 and 35 breaths/min, and no signs of respiratory distress.
Primary outcome measures
- Ventilator-free days (VFDs) at day 28 after enrollment. [Time frame: 28 days]
Secondary outcome measures (8)
- Duration of mechanical ventilation after enrollment [Time frame: 28 days]
- The time before the first spontaneous breathing trial [Time frame: 28 days]
- Weaning time [Time frame: 28 days]
- Frequency of prolonged weaning [Time frame: 28 days]
- ICU mortality [Time frame: 28 days]
- Hospital mortality [Time frame: 28 days]
- Length of stay in the ICU [Time frame: 28 days]
- Length of stay in the hospital [Time frame: 28 days]
Eligibility criteria
Mechanically ventilated patients, who are admitted to the ICU with acute hypoxic respiratory failure, will be consecutively screened daily at 08:00-10:00 morning rounds.
Inclusion criteria
- PSV initiated during the last 24 hours;
- Mechanical ventilation expected to be required for at least 24-48 h by responsible physicians;
- The partial pressure of oxygen in arterial blood (PaO2)/inspired oxygen fraction (FiO2) ≤ 300 mmHg (measuring at clinical FiO2 and positive end-expiratory pressure PEEP);
- No sedation or stable sedation with Richmond Agitation Sedation Scale (RASS) of -2 to +1 or Riker's Sedation-Agitation Scale (SAS) of 3 to 4.
Exclusion criteria included:
- Age younger than 18 years old;
- Initiation of PSV before ICU admission;
- Duration of mechanical ventilation longer than 7 days before enrollment;
- History of neuromuscular diseases;
- Clinical suspicion of increased intracranial pressure;
- Extracorporeal support;
- Moribund conditions;
- Refusal by the ICU physicians or the patient.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Single blind
- Primary purpose
- Treatment
Study locations
China · 1 center
- Beijing Shijitan Hospital — Beijing
Publications
- Lu WY, Miao MY, Gao R, Yang YL, Zhang L, Weng L, Zhu FX, Liu L, Zhou JX. A cluster randomized trial on inspiratory effort-targeted pressure support adjustment strategy in patients undergoing assisted mechanical ventilation: protocol for the IT-PSV study. Front Med (Lausanne). 2024 Nov 8;11:1483976. doi: 10.3389/fmed.2024.1483976. eCollection 2024. PMID 39582975
Identifiers
NCT: NCT06526598 · IIT2024-029-004