A computer program for automatic measurement of respiratory mechanics in artificially ventilated patients

Baconnier, Pierre; Carry, Pierre Yves; Eberhard, André; Perdrix, Jean Pierre; Fargnoli, J.M.

doi:10.1016/0169-2607(95)01651-9

Cited by 17 publications

(13 citation statements)

References 11 publications

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“…The first improvement consists in a different advanced approach for the breathing control of DCV with square waveform as airways pressure excitation. Instead of arbitrary pre-established parameters, the ventilation control takes into account the current respiratory characteristics of patient and his diagnostic evaluations, both obtained from a monitoring system [19,20]. The second improvement consists in a more realistic approximation of the airways pressure waveform to physiological transpulmonary pressure waveform.…”

Section: State Of the Art And Research Requirements For Assisted/contmentioning

confidence: 99%

Advanced lung ventilation system (ALVS) with linear respiratory mechanics assumption for waveform optimization of dual-controlled ventilation

Montecchia

Guerrisi

Canichella

2007

Medical Engineering & Physics

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Section: State Of the Art And Research Requirements For Assisted/contmentioning

confidence: 99%

Advanced lung ventilation system (ALVS) with linear respiratory mechanics assumption for waveform optimization of dual-controlled ventilation

Montecchia

Guerrisi

Canichella

2007

Medical Engineering & Physics

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“…While in previous models the lung volume remained constant during the study, here the inspiratory and expiratory phases are explicitly modelled by a linear algebraic equation (AE) relating the respiratory pump muscle effort and the lung volume in a similar fashion to models of respiratory mechanics during spontaneous quiet breathing (Lorino et al, 1982) and lower airway flow limitation (Bijaoui et al, 1999). This type of model lung has been applied in testing (Mecklenburgh et al, 1992), monitoring (Baconnier et al, 1995), and analysing (Crooke et al, 1998) the performance of mechanical ventilators.…”

Section: Theoretical Modelsmentioning

confidence: 98%

Adjustment of the Human Respiratory System to Increased Upper Airway Resistance During Sleep

Aittokallio

Gyllenberg

Polo

2002

Bulletin of Mathematical Biology

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A cardiorespiratory model incorporating control of the human upper airway during sleep is described. Most previous models have not considered the possibility that the upper airway could be a limiting factor for gas exchange. Our model was developed to also predict certain pathophysiological phenomena in the cardiorespiratory system that characterize heavy snoring or sleep apnea. We started by adapting our collapsible upper airway model to include the impact of nasal passage and larynx, and extended the model with equations for gas exchange in the lungs. A feedback loop both to the respiratory pump and the upper airway dilator muscles was included. The model enabled successful breath-by-breath simulations of obstructive events of the upper airway. Although the model incorporates several physiologically relevant components of the system, the simulation results suggest that only few parameters suffice to predict the key adjustments that the cardiorespiratory system is known to make in patients with heavy snoring.

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“…The importance of determining the diagnostic parameters associated to the respiratory mechanics of patient during the ventilation treatment is well established [25][26][27].…”

Section: Diagnostic Measurement Proceduresmentioning

confidence: 99%

Harmonic excitation of linear respiratory mechanics for physiological dual controlled ventilation

Montecchia¹

2012

JBiSE

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The theoretical approach along with the rationale of harmonic excitation modality (HEM) applied as optimal dual controlled ventilation (DCV) to anaesthetized or severe brain injured patients, whose respiretory mechanics can be properly assumed steady and linear, are presented and discussed. The design criteria of an improved version of the Advanced Lung Ventilation System (ALVS), including HEM in its functional features, are described in details. In particular, the elimination of any undesiderable artificial distortion affecting the respiratory and ventilation pattern waveforms is achieved by maintaining continuous forever the airflow inside the ventilation circuit, ensuring also the highest level of safety for patient in any condition. In such a way, the full-time compatibility of controlled breathings with spontaneous breathing activity of patient during continuous positive airways pressure (CPAP) or bilevel positive airways pressure (BiPAP) ventilation modalities and during assisted/controlled ventilation(A/CV), includeing also synchronized or triggered ventilation modalities, is an intrinsic innovative feature of the system available for clinical application. As expected and according to the clinical requirements, HEM provides for physiological respiratory and ventilation pattern waveforms together with optimal "breath to breath" feedback control of lung volume driven by an improved diagnostic measurement procedure, whose outputs are also vital for adapting all the pre-set ventilation parameters to the current value of the respiratory parameters of patient. The results produced by software simulations concerning both adult and neonatal patients in different clinical conditions are completely consistent with those obtained by the theoretical treatment, showing that HEM reaches the best performances from both clinical and engineering points of view.

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A computer program for automatic measurement of respiratory mechanics in artificially ventilated patients

Cited by 17 publications

References 11 publications

Advanced lung ventilation system (ALVS) with linear respiratory mechanics assumption for waveform optimization of dual-controlled ventilation

Advanced lung ventilation system (ALVS) with linear respiratory mechanics assumption for waveform optimization of dual-controlled ventilation

Adjustment of the Human Respiratory System to Increased Upper Airway Resistance During Sleep

Harmonic excitation of linear respiratory mechanics for physiological dual controlled ventilation

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