OBJECTIVES: To compare changes in aerated lung volumes measured by positron emission tomography (PET) and inflation volume-pressure curve (V-P) of the respiratory system, and to evaluate the reliability of PET to assess alveolar recruitment. DESIGN AND SETTING: Experimental study in six anesthetized and mechanically ventilated pigs in a PET facility in an experimental university laboratory. INTERVENTIONS: Lung injury was induced by oleic acid. Animals were randomly studied in four conditions: PEEP 0cmH(2)O (ZEEP) in supine position (SP), PEEP 10cmH(2)O in SP, ZEEP in prone position (PP) and PEEP in PP, each applied for 30min. MEASUREMENTS AND RESULTS: With PET aerated lung volume was obtained from pulmonary density analysis using transmission scan (VA(trans)) and from nitrogen-13 kinetics on emission scan (VA(em)). Changes in VA(trans) and VA(em) were computed as the difference in aerated volume between conditions. VA(trans) and VA(em) did not differ between SP and PP, on either ZEEP or PEEP, suggesting no modification in relaxation volume of the respiratory system induced by posture. Changes in VA(trans) or VA(em) were significantly correlated with changes in aerated volume assessed from superimposed V-P curves (R (2)=0.74 and 0.75, respectively). Alveolar recruitment assessed by PET was significantly correlated with both PaO(2) (R (2)=0.61) and PaCO(2) (R (2)=0.40) variations induced by PEEP. CONCLUSIONS: PET is a new reliable tool of scientific interest to image lung volume and alveolar recruitment during acute lung injury.
OBJECTIVES: To compare changes in aerated lung volumes measured by positron emission tomography (PET) and inflation volume-pressure curve (V-P) of the respiratory system, and to evaluate the reliability of PET to assess alveolar recruitment. DESIGN AND SETTING: Experimental study in six anesthetized and mechanically ventilated pigs in a PET facility in an experimental university laboratory. INTERVENTIONS:Lung injury was induced by oleic acid. Animals were randomly studied in four conditions: PEEP 0cmH(2)O (ZEEP) in supine position (SP), PEEP 10cmH(2)O in SP, ZEEP in prone position (PP) and PEEP in PP, each applied for 30min. MEASUREMENTS AND RESULTS: With PET aerated lung volume was obtained from pulmonary density analysis using transmission scan (VA(trans)) and from nitrogen-13 kinetics on emission scan (VA(em)). Changes in VA(trans) and VA(em) were computed as the difference in aerated volume between conditions. VA(trans) and VA(em) did not differ between SP and PP, on either ZEEP or PEEP, suggesting no modification in relaxation volume of the respiratory system induced by posture. Changes in VA(trans) or VA(em) were significantly correlated with changes in aerated volume assessed from superimposed V-P curves (R (2)=0.74 and 0.75, respectively). Alveolar recruitment assessed by PET was significantly correlated with both PaO(2) (R (2)=0.61) and PaCO(2) (R (2)=0.40) variations induced by PEEP. CONCLUSIONS: PET is a new reliable tool of scientific interest to image lung volume and alveolar recruitment during acute lung injury.
Authors: Q Lu; S R Vieira; J Richecoeur; L Puybasset; P Kalfon; P Coriat; J J Rouby Journal: Am J Respir Crit Care Med Date: 1999-01 Impact factor: 21.405
Authors: P Pelosi; D Tubiolo; D Mascheroni; P Vicardi; S Crotti; F Valenza; L Gattinoni Journal: Am J Respir Crit Care Med Date: 1998-02 Impact factor: 21.405
Authors: Peter Andrews; Elie Azoulay; Massimo Antonelli; Laurent Brochard; Christian Brun-Buisson; Daniel De Backer; Geoffrey Dobb; Jean-Yves Fagon; Herwig Gerlach; Johan Groeneveld; Duncan Macrae; Jordi Mancebo; Philipp Metnitz; Stefano Nava; Jerôme Pugin; Michael Pinsky; Peter Radermacher; Christian Richard Journal: Intensive Care Med Date: 2006-12-19 Impact factor: 17.440
Authors: Tyler J Wellman; Tilo Winkler; Eduardo L V Costa; Guido Musch; R Scott Harris; Jose G Venegas; Marcos F Vidal Melo Journal: J Nucl Med Date: 2010-03-17 Impact factor: 10.057
Authors: R S Rodrigues; P R Miller; F A Bozza; E Marchiori; G A Zimmerman; J M Hoffman; K A Morton Journal: Intensive Care Med Date: 2008-08-06 Impact factor: 17.440
Authors: Maurizio Cereda; Yi Xin; Alberto Goffi; Jacob Herrmann; David W Kaczka; Brian P Kavanagh; Gaetano Perchiazzi; Takeshi Yoshida; Rahim R Rizi Journal: Anesthesiology Date: 2019-09 Impact factor: 7.892
Authors: J C Richard; C Pouzot; A Gros; C Tourevieille; D Lebars; F Lavenne; I Frerichs; C Guérin Journal: Crit Care Date: 2009-05-29 Impact factor: 9.097