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Titolo:
Estimation of end-expiratory lung volume variations by optoelectronic plethysmography
Autore:
Dellaca, RL; Aliverti, A; Pelosi, P; Carlesso, E; Chiumello, D; Pedotti, A; Gattinoni, L;
Indirizzi:
Politecn Milan, Dipartimento Bioingn, I-20133 Milan, Italy Politecn MilanMilan Italy I-20133 timento Bioingn, I-20133 Milan, Italy Politecn Milan, Fond Don Gnocchi IRCCS, Ctr Bioingn, I-20133 Milan, Italy Politecn Milan Milan Italy I-20133 CS, Ctr Bioingn, I-20133 Milan, Italy Univ Insubria, Dipartimento Sci Clin & Biol, Varese, Italy Univ Insubria Varese Italy Dipartimento Sci Clin & Biol, Varese, Italy Univ Milan, Ist Anestesia & Rianimaz, Milan, Italy Univ Milan Milan Italy iv Milan, Ist Anestesia & Rianimaz, Milan, Italy Osped Maggiore, IRCCS, Serv Anestesia & Rianimaz, Milan, Italy Osped Maggiore Milan Italy CCS, Serv Anestesia & Rianimaz, Milan, Italy
Titolo Testata:
CRITICAL CARE MEDICINE
fascicolo: 9, volume: 29, anno: 2001,
pagine: 1807 - 1811
SICI:
0090-3493(200109)29:9<1807:EOELVV>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
FUNCTIONAL RESIDUAL CAPACITY; ACUTE PULMONARY FAILURE; CONTROLLED VENTILATION; RESPIRATORY SYSTEM; TIDAL VOLUME; PRESSURE; PEEP; MECHANICS; EXERCISE;
Keywords:
end-expiratory lung volume; optoelectronic plethysmography; acute respiratory failure; helium dilution technique;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Dellaca, RL Politecn Milan, Dipartimento Bioingn, Pizza Leonardo da Vinci 32, I-20133 Milan, Italy Politecn Milan Pizza Leonardo da Vinci 32 Milan Italy I-20133
Citazione:
R.L. Dellaca et al., "Estimation of end-expiratory lung volume variations by optoelectronic plethysmography", CRIT CARE M, 29(9), 2001, pp. 1807-1811

Abstract

Objective: To test the capability of optoelectronic plethysmography (OEP) to monitor positive end-expiratory pressure (PEEP)induced changes of end-expiratory lung volume (EELV) changes in mechanically ventilated paralyzed patients. Design: Laboratory and clinical investigation. Setting: Intensive care unit of the Ospedale Maggiore Policlinico di Milano. Patients. A total of eight patients with respiratory failure of various degrees, sedated and paralyzed. Interventions. PEEP variations (+/-5 cm H2O) relative to the baseline PEEP of 10 cm H2O. Measurements and Main Results: In the model protocol, we tested the reproducibility of the OEP by repeating volume measurements of a plastic torso model over a 21-hr period, every 30 mins. The variations of OEP measurements of the torso model (9337 mL value) were encountered in a range of 16 mL (SD= 4 mL). In the patient protocol, we measured the end-expiratory volume ofthe chest wall (EEVCW) breath-by-breath by OEP before, during, and after the PEEP increase/decrease and we compared its variations with the corresponding variations of EELV measured by helium dilution technique. The regression line between EELV changes measured by helium and EEVCW changes measured by OEP resulted very close to the identity line (slope 1.06, intercept -0.02 L, r(2) = 0.89) and their difference was not related to their absolute magnitude. After PEEP increase, the new steady state of EEVCW was reached approximately in 15 breaths; and, after PEEP decrease, in 3-4 breaths. The slow increase in EEVCW was mainly because of the abdominal compartment. Conclusion: OEP measurements of EEVCW accurately reflect the changes of EELV. Furthermore, OEP allows a continuous compartmental analysis, even during unsteady conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 19:06:31