Respiratory Mechanics Assessment at Different Head of the Bed Elevations in Mechanically Ventilated Patients

NCT06409897 | Recruiting

• 1 other identifier: 68464523.9.0000.0068
• Study Type: interventional
• Target: 40
• Locations: 1 country
• Sites: 1

Brief Summary

The effects of different degrees of head-of-bed elevation on respiratory mechanics are poorly explored in the literature, and no study has investigated such effects using electrical impedance tomography, esophageal and gastric balloons to identify the ideal angle for optimizing respiratory mechanics. The hypothesis is that there is a optimal degree for the respiratory mechanics.

Conditions

Respiratory Failure; Pulmonary Disease

Keywords

Respiratory Failure; Pulmonary disease; Intensive care; Respiratory Mechanics

Outcome Measures

Primary Outcomes (3)

• Respiratory system compliance

  Respiratory system compliance (mL/cmH2O) will be measured using electrical impedance tomography monitoring (Enlight 2100, Timpel Medical®, Brazil).

  At 0, 10, 20, 30, 40-degrees of head-of-bed elevation, and with titrated PEEP at 10-degrees of head-of-bed elevation

• Lung compliance

  Lung compliance (mL/cmH2O) will be measured offline using the esophageal pressure tracings. By knowing the respiratory system and chest wall compliance, the lung compliance will be calculated. (1/respiratory system compliance = 1/chest wall compliance + 1/lung compliance)

  At 0, 10, 20, 30, 40-degrees of head-of-bed elevation, and with titrated PEEP at 10-degrees of head-of-bed elevation

• Chest wall compliance

  Chest wall compliance (mL/cmH2O) will be measured offline using the esophageal pressure tracings. Chest wall compliance = tidal volume / delta esophageal pressure

  At 0, 10, 20, 30, 40-degrees of head-of-bed elevation, and with titrated PEEP at 10-degrees of head-of-bed elevation

Secondary Outcomes (4)

• Oxygenation

  At 0 and 40-degrees of head-of-bed elevation, and with titrated PEEP at 10-degrees of head-of-bed elevation

• Pressure between patient skin surface and the mattress

  At 0, 10, 20, 30, 40-degrees of head-of-bed elevation

• Hemodynamics satefy of keeping low degrees of head of the elevation

  At 0, 10, 20, 30, 40-degrees of head-of-bed elevation

• Gastric pressure

  At 0 and 40-degrees of head-of-bed elevation, and with titrated PEEP at 10-degrees of head-of-bed elevation

Study Arms (1)

Sequential head-of-bed elevation

OTHER

Patients will be positioned at 0 degrees of head-of-bed elevation, and after stabilization of the plethysmogram, data from electrical impedance tomography, hemodynamics, and arterial blood gas will be collected (arterial blood will be drawn by a nurse or physician). Sequentially and in the same manner, the bed will be adjusted to 10, 20, 30, and 40 degrees (the same data will be collected, except for the arterial blood sample, which will only be collected at the 40-degree elevation). Then, an alveolar recruitment maneuver will be performed, followed by a PEEP titration with 10-degree of head-of-bed elevation, and the data will be collected just as in the 0° and 40° steps.

Other: Sequencial increasing of head of the bed elevation and alveolar recruitment maneuver followed by a PEEP titration with 10° of head of the elevation

Interventions

Sequencial increasing of head of the bed elevation and alveolar recruitment maneuver followed by a PEEP titration with 10° of head of the elevation OTHER

Patients will be sequentially positioned at 0, 10, 20, 30, and 40 degrees of head-of-bed elevation. An alveolar recruitment maneuver will be performed. For patients with body mass index ≤ 30 kg/m\^2, the maneuver will be conducted in pressure control mode, pressure control = 15 cmH2O, respiratory rate = 20 breaths per minute, and the PEEP will be increased in steps of 5 up to 30 cmH2O. For patients with body mass index \> 30, the PEEP will be increased up to 35. Then, a PEEP titration will be performed, tidal volume = 5 mL/Kg, respiratory rate = 25 breaths per minute, and the PEEP will be decreased from 24 down to 4 cmH2O in steps of 2 cmH2O with 30 seconds in each PEEP level. The PEEP titration software of Enlight 2100 will be used to determine the ideal PEEP, defined as the PEEP level with a collapse less than 5%. The alveolar recruitment maneuver will be performed again to reopen the lungs. Then, data will be collected, as with the 0 and 40-degree steps, with ideal PEEP.

Sequential head-of-bed elevation

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Patients under invasive mechanical ventilation, intubated due to respiratory failure

You may not qualify if:

• Hemodynamics instability, contraindication for monitoring with esophageal and gastric catheters, and Electrical impedance tomography, no authorization of medical team of the intensive care unit, and contraindication for lung recruitment maneuver

Sponsors & Collaborators

• University of Sao Paulo General Hospital: lead

Study Sites (1)

Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da USP

São Paulo, 05403-900, Brazil

RECRUITING

Related Publications (20)

• Amato MB, Barbas CS, Medeiros DM, Magaldi RB, Schettino GP, Lorenzi-Filho G, Kairalla RA, Deheinzelin D, Munoz C, Oliveira R, Takagaki TY, Carvalho CR. Effect of a protective-ventilation strategy on mortality in the acute respiratory distress syndrome. N Engl J Med. 1998 Feb 5;338(6):347-54. doi: 10.1056/NEJM199802053380602.

  PMID: 9449727 BACKGROUND

• 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 BACKGROUND

• Villar J, Kacmarek RM, Perez-Mendez L, Aguirre-Jaime A. A high positive end-expiratory pressure, low tidal volume ventilatory strategy improves outcome in persistent acute respiratory distress syndrome: a randomized, controlled trial. Crit Care Med. 2006 May;34(5):1311-8. doi: 10.1097/01.CCM.0000215598.84885.01.

  PMID: 16557151 BACKGROUND

• Briel M, Meade M, Mercat A, Brower RG, Talmor D, Walter SD, Slutsky AS, Pullenayegum E, Zhou Q, Cook D, Brochard L, Richard JC, Lamontagne F, Bhatnagar N, Stewart TE, Guyatt G. Higher vs lower positive end-expiratory pressure in patients with acute lung injury and acute respiratory distress syndrome: systematic review and meta-analysis. JAMA. 2010 Mar 3;303(9):865-73. doi: 10.1001/jama.2010.218.

  PMID: 20197533 BACKGROUND

• Amato MB, Meade MO, Slutsky AS, Brochard L, Costa EL, Schoenfeld DA, Stewart TE, Briel M, Talmor D, Mercat A, Richard JC, Carvalho CR, Brower RG. Driving pressure and survival in the acute respiratory distress syndrome. N Engl J Med. 2015 Feb 19;372(8):747-55. doi: 10.1056/NEJMsa1410639.

  PMID: 25693014 BACKGROUND

• Costa EL, Lima RG, Amato MB. Electrical impedance tomography. Curr Opin Crit Care. 2009 Feb;15(1):18-24. doi: 10.1097/mcc.0b013e3283220e8c.

  PMID: 19186406 BACKGROUND

• Galiatsou E, Kostanti E, Svarna E, Kitsakos A, Koulouras V, Efremidis SC, Nakos G. Prone position augments recruitment and prevents alveolar overinflation in acute lung injury. Am J Respir Crit Care Med. 2006 Jul 15;174(2):187-97. doi: 10.1164/rccm.200506-899OC. Epub 2006 Apr 27.

  PMID: 16645177 BACKGROUND

• Mutoh T, Guest RJ, Lamm WJ, Albert RK. Prone position alters the effect of volume overload on regional pleural pressures and improves hypoxemia in pigs in vivo. Am Rev Respir Dis. 1992 Aug;146(2):300-6. doi: 10.1164/ajrccm/146.2.300.

  PMID: 1489116 BACKGROUND

• Roldan R, Rodriguez S, Barriga F, Tucci M, Victor M, Alcala G, Villamonte R, Suarez-Sipmann F, Amato M, Brochard L, Tusman G. Sequential lateral positioning as a new lung recruitment maneuver: an exploratory study in early mechanically ventilated Covid-19 ARDS patients. Ann Intensive Care. 2022 Feb 12;12(1):13. doi: 10.1186/s13613-022-00988-9.

  PMID: 35150355 BACKGROUND

• Richard JC, Maggiore SM, Mancebo J, Lemaire F, Jonson B, Brochard L. Effects of vertical positioning on gas exchange and lung volumes in acute respiratory distress syndrome. Intensive Care Med. 2006 Oct;32(10):1623-6. doi: 10.1007/s00134-006-0299-y. Epub 2006 Aug 1.

  PMID: 16896856 BACKGROUND

• Dellamonica J, Lerolle N, Sargentini C, Hubert S, Beduneau G, Di Marco F, Mercat A, Diehl JL, Richard JC, Bernardin G, Brochard L. Effect of different seated positions on lung volume and oxygenation in acute respiratory distress syndrome. Intensive Care Med. 2013 Jun;39(6):1121-7. doi: 10.1007/s00134-013-2827-x. Epub 2013 Jan 24.

  PMID: 23344832 BACKGROUND

• Marrazzo F, Spina S, Forlini C, Guarnieri M, Giudici R, Bassi G, Bastia L, Bottiroli M, Fumagalli R, Langer T. Effects of Trunk Inclination on Respiratory Mechanics in Patients with COVID-19-associated Acute Respiratory Distress Syndrome: Let's Always Report the Angle! Am J Respir Crit Care Med. 2022 Mar 1;205(5):582-584. doi: 10.1164/rccm.202110-2360LE. No abstract available.

  PMID: 34982652 BACKGROUND

• Mahran GSK, Abd-Elshafy SK, Abd El Neem MM, Sayed JA. The effect of reference position versus right lateral position on the intra-abdominal pressure in mechanically ventilated patients. Journal of Nursing Education and Practice. 2018;8(6).

  BACKGROUND

• Vasquez DG, Berg-Copas GM, Wetta-Hall R. Influence of semi-recumbent position on intra-abdominal pressure as measured by bladder pressure. J Surg Res. 2007 May 15;139(2):280-5. doi: 10.1016/j.jss.2006.10.023. Epub 2006 Dec 8.

  PMID: 17161433 BACKGROUND

• McBeth PB, Zygun DA, Widder S, Cheatham M, Zengerink I, Glowa J, Kirkpatrick AW. Effect of patient positioning on intra-abdominal pressure monitoring. Am J Surg. 2007 May;193(5):644-7; discussion 647. doi: 10.1016/j.amjsurg.2007.01.013.

  PMID: 17434374 BACKGROUND

• Samimian S, Ashrafi S, Khaleghdoost Mohammadi T, Yeganeh MR, Ashraf A, Hakimi H, Dehghani M. The Correlation between Head of Bed Angle and Intra-Abdominal Pressure of Intubated Patients; a Pre-Post Clinical Trial. Arch Acad Emerg Med. 2021 Mar 6;9(1):e23. doi: 10.22037/aaem.v9i1.1065. eCollection 2021.

  PMID: 33870210 BACKGROUND

• Selickman J, Crooke PS, Tawfik P, Dries DJ, Gattinoni L, Marini JJ. Paradoxical Positioning: Does "Head Up" Always Improve Mechanics and Lung Protection? Crit Care Med. 2022 Nov 1;50(11):1599-1606. doi: 10.1097/CCM.0000000000005631. Epub 2022 Jul 21.

  PMID: 35866650 BACKGROUND

• Wang L, Li X, Yang Z, Tang X, Yuan Q, Deng L, Sun X. Semi-recumbent position versus supine position for the prevention of ventilator-associated pneumonia in adults requiring mechanical ventilation. Cochrane Database Syst Rev. 2016 Jan 8;2016(1):CD009946. doi: 10.1002/14651858.CD009946.pub2.

  PMID: 26743945 BACKGROUND

• Guner CK, Kutluturkan S. Role of head-of-bed elevation in preventing ventilator-associated pneumonia bed elevation and pneumonia. Nurs Crit Care. 2022 Sep;27(5):635-645. doi: 10.1111/nicc.12633. Epub 2021 Apr 21.

  PMID: 33884691 BACKGROUND

• Marfil-Gomez RM, Garcia-Mayor S, Morales-Asencio JM, Gomez-Gonzalez AJ, Morilla-Herrera JC, Moya-Suarez AB, Aranda-Gallardo M, Rincon-Lopez T, Lupianez-Perez I. Pressure levels in the trochanter area according to repositioning at different degrees of inclination in healthy subjects. J Tissue Viability. 2020 May;29(2):125-129. doi: 10.1016/j.jtv.2020.02.003. Epub 2020 Feb 13.

  PMID: 32115351 BACKGROUND

MeSH Terms

Conditions

Respiratory Insufficiency; Lung Diseases

Condition Hierarchy (Ancestors)

Respiration Disorders; Respiratory Tract Diseases

Study Officials

• Marcelo BP Amato, MD, PhD

  University of Sao Paulo General Hospital

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Marcelo BP Amato, MD, PhD

CONTACT

3061-7361; marcelo.amato@hc.fm.usp.br

Ana C Cardoso dos Santos, PT

CONTACT

+5511968022077; cardosocsfisio@gmail.com

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Model Details: All the participants will be exposed to the same situations (head-of-bed elevations), in the same order. An alveolar recruitment maneuver followed by a PEEP titration with 10-degree head-of-bed elevation will be performed.

Study Record Dates

• First Submitted: April 24, 2024
• First Posted: May 10, 2024
• Study Start: October 15, 2023
• Primary Completion: April 1, 2025
• Study Completion: April 1, 2025
• Last Updated: May 10, 2024

Record last verified: 2024-04

Data Sharing

• IPD Sharing: Will not share

Locations

BR (1)