Intensive Care Medicine

, Volume 38, Issue 3, pp 395–403

ECMO criteria for influenza A (H1N1)-associated ARDS: role of transpulmonary pressure

  • Salvatore Grasso
  • Pierpaolo Terragni
  • Alberto Birocco
  • Rosario Urbino
  • Lorenzo Del Sorbo
  • Claudia Filippini
  • Luciana Mascia
  • Antonio Pesenti
  • Alberto Zangrillo
  • Luciano Gattinoni
  • V. Marco Ranieri
Original

DOI: 10.1007/s00134-012-2490-7

Cite this article as:
Grasso, S., Terragni, P., Birocco, A. et al. Intensive Care Med (2012) 38: 395. doi:10.1007/s00134-012-2490-7

Abstract

Purpose

To assess whether partitioning the elastance of the respiratory system (ERS) between lung (EL) and chest wall (ECW) elastance in order to target values of end-inspiratory transpulmonary pressure (PPLATL) close to its upper physiological limit (25 cmH2O) may optimize oxygenation allowing conventional treatment in patients with influenza A (H1N1)-associated ARDS referred for extracorporeal membrane oxygenation (ECMO).

Methods

Prospective data collection of patients with influenza A (H1N1)-associated ARDS referred for ECMO (October 2009–January 2010). Esophageal pressure was used to (a) partition respiratory mechanics between lung and chest wall, (b) titrate positive end-expiratory pressure (PEEP) to target the upper physiological limit of PPLATL (25 cmH2O).

Results

Fourteen patients were referred for ECMO. In seven patients PPLATL was 27.2 ± 1.2 cmH2O; all these patients underwent ECMO. In the other seven patients, PPLATL was 16.6 ± 2.9 cmH2O. Raising PEEP (from 17.9 ± 1.2 to 22.3 ± 1.4 cmH2O, P = 0.0001) to approach the upper physiological limit of transpulmonary pressure (PPLATL = 25.3 ± 1.7 cm H2O) improved oxygenation index (from 37.4 ± 3.7 to 16.5 ± 1.4, P = 0.0001) allowing patients to be treated with conventional ventilation.

Conclusions

Abnormalities of chest wall mechanics may be present in some patients with influenza A (H1N1)-associated ARDS. These abnormalities may not be inferred from measurements of end-inspiratory plateau pressure of the respiratory system (PPLATRS). In these patients, titrating PEEP to PPLATRS may overestimate the incidence of hypoxemia refractory to conventional ventilation leading to inappropriate use of ECMO.

Keywords

ARDSInfluenza A (H1N1)Transpulmonary pressureExtracorporeal membrane oxygenation

Supplementary material

134_2012_2490_MOESM1_ESM.doc (173 kb)
Supplementary material 1 (DOC 173 kb)

Copyright information

© Copyright jointly held by Springer and ESICM 2012

Authors and Affiliations

  • Salvatore Grasso
    • 1
  • Pierpaolo Terragni
    • 2
  • Alberto Birocco
    • 2
  • Rosario Urbino
    • 2
  • Lorenzo Del Sorbo
    • 2
  • Claudia Filippini
    • 2
  • Luciana Mascia
    • 2
  • Antonio Pesenti
    • 3
  • Alberto Zangrillo
    • 4
  • Luciano Gattinoni
    • 5
  • V. Marco Ranieri
    • 2
  1. 1.Dipartimento dell’Emergenza e Trapianti d’Organo, Sezione di Anestesiologia e RianimazioneUniversità degli Studi Aldo MoroBariItaly
  2. 2.Dipartimento di Anestesia e di Medicina degli Stati CriticiOspedale S.Giovanni Battista-Molinette Università di TorinoTurinItaly
  3. 3.Dipartimento di Medicina SperimentaleUniversità Milano-Bicocca, Ospedale San GerardoMonzaItaly
  4. 4.Dipartimento di Anestesia Cardiaca e Terapia IntensivaUniversità Vita-Salute San RaffaeleMilanItaly
  5. 5.Dipartimento di AnestesiologiaFondazione Istituto Di Ricovero e Cura a Carattere Scientifico – Ospedale Maggiore Policlinico, Università degli Studi di MilanoMilanItaly