Early PP Monitored by EIT in Patients With ARDS

Official title

Early Prone Positioning Monitored by Electrical Impedance Tomography in Patients With Acute Respiratory Distress Syndrome

Overview

Acute Respiratory Distress Syndrome (ARDS) is a syndrome characterized by respiratory distress and refractory hypoxemia caused by pulmonary and extra-pulmonary factors. Despite improvements in diagnosis and treatment in recent years, the mortality rate of severe ARDS is still around 40%. The distribution of lung lesions in ARDS patients is significantly gravity-dependent. Even with lung-protective ventilation strategies, tidal volume is concentrated in the ventral lung region, leading to ventilator-associated lung injury. Prone position ventilation can increase ventilation to the dorsal lung tissue and improve the ventilation-perfusion ratio, thus improving oxygenation. During prone position ventilation in ARDS patients, lung-protective ventilation strategies should be maintained, but with different respiratory mechanics from the supine position, requiring adjustment of ventilator parameters. Electrical Impedance Tomography (EIT) technology can be used for bedside monitoring of mechanically ventilated patients, providing real-time feedback on the patient's ventilation status and having great potential for clinical applications. Investigators believes that EIT monitoring during prone position ventilation in ARDS patients can individualize lung-protective ventilation strategies, minimize alveolar overdistension and collapse, improve the weaning success rate of invasive ventilation, and ultimately improve patient prognosis.

Interventions

• Procedure EIT-guided mechanical ventilation strategy
  During prone ventilation, the PEEP level is adjusted based on EIT monitoring. The optimal PEEP is the lowest sum of collapse and overdistension percentages
• Procedure Lung protective ventilation group
  Lung-protective ventilation strategy during prone positioning that continues the supine position.

Primary outcome measures

• 28-day weaning rate from invasive mechanical ventilation [Time frame: At 28 days of hospitalization.]

Eligibility criteria

Inclusion criteria

• Age ≥ 18 years old；
• Meets the diagnostic criteria for ARDS according to the 2012 Berlin definition；
• Intubation with invasive mechanical ventilation time < 36 hours；
• PaO2/FiO2 < 150mmHg.

Exclusion criteria

• Contraindication to the prone position;
• Contraindication to the EIT;
• Patients have received extracorporeal membrane oxygenation treatment.

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

Double blind

Primary purpose

Treatment

Study locations

China · 1 center

• Beijing Chao-Yang Hospital — Beijing

Publications

• Bellani G, Laffey JG, Pham T, Fan E, Brochard L, Esteban A, Gattinoni L, van Haren F, Larsson A, McAuley DF, Ranieri M, Rubenfeld G, Thompson BT, Wrigge H, Slutsky AS, Pesenti A; LUNG SAFE Investigators; ESICM Trials Group. Epidemiology, Patterns of Care, and Mortality for Patients With Acute Respiratory Distress Syndrome in Intensive Care Units in 50 Countries. JAMA. 2016 Feb 23;315(8):788-800. d PMID 26903337
• Guan WJ, Ni ZY, Hu Y, Liang WH, Ou CQ, He JX, Liu L, Shan H, Lei CL, Hui DSC, Du B, Li LJ, Zeng G, Yuen KY, Chen RC, Tang CL, Wang T, Chen PY, Xiang J, Li SY, Wang JL, Liang ZJ, Peng YX, Wei L, Liu Y, Hu YH, Peng P, Wang JM, Liu JY, Chen Z, Li G, Zheng ZJ, Qiu SQ, Luo J, Ye CJ, Zhu SY, Zhong NS; China Medical Treatment Expert Group for Covid-19. Clinical Characteristics of Coronavirus Disease 2019 PMID 32109013
• Acute Respiratory Distress Syndrome Network; Brower RG, Matthay MA, Morris A, Schoenfeld D, Thompson BT, Wheeler A. Ventilation with lower tidal volumes as compared with traditional tidal volumes for acute lung injury and the acute respiratory distress syndrome. N Engl J Med. 2000 May 4;342(18):1301-8. doi: 10.1056/NEJM200005043421801. PMID 10793162
• Brower RG, Lanken PN, MacIntyre N, Matthay MA, Morris A, Ancukiewicz M, Schoenfeld D, Thompson BT; National Heart, Lung, and Blood Institute ARDS Clinical Trials Network. Higher versus lower positive end-expiratory pressures in patients with the acute respiratory distress syndrome. N Engl J Med. 2004 Jul 22;351(4):327-36. doi: 10.1056/NEJMoa032193. PMID 15269312
• Borges JB, Hansen T, Larsson A, Hedenstierna G. The "normal" ventilated airspaces suffer the most damaging effects of mechanical ventilation. Intensive Care Med. 2017 Jul;43(7):1057-1058. doi: 10.1007/s00134-017-4708-1. Epub 2017 Feb 15. No abstract available. PMID 28204859
• Borges JB, Costa EL, Bergquist M, Lucchetta L, Widstrom C, Maripuu E, Suarez-Sipmann F, Larsson A, Amato MB, Hedenstierna G. Lung inflammation persists after 27 hours of protective Acute Respiratory Distress Syndrome Network Strategy and is concentrated in the nondependent lung. Crit Care Med. 2015 May;43(5):e123-32. doi: 10.1097/CCM.0000000000000926. PMID 25746507
• Terragni PP, Rosboch G, Tealdi A, Corno E, Menaldo E, Davini O, Gandini G, Herrmann P, Mascia L, Quintel M, Slutsky AS, Gattinoni L, Ranieri VM. Tidal hyperinflation during low tidal volume ventilation in acute respiratory distress syndrome. Am J Respir Crit Care Med. 2007 Jan 15;175(2):160-6. doi: 10.1164/rccm.200607-915OC. Epub 2006 Oct 12. PMID 17038660
• Scholten EL, Beitler JR, Prisk GK, Malhotra A. Treatment of ARDS With Prone Positioning. Chest. 2017 Jan;151(1):215-224. doi: 10.1016/j.chest.2016.06.032. Epub 2016 Jul 8. PMID 27400909

Identifiers

NCT: NCT05822869 · 2022-KE-616

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗