An Improved Physical Lung Model for Teaching Lung Ventilation

This article describes an easily made physical lung model for teaching about lung ventilation. It has rectified some major shortcomings of the bell-jar balloon model by having a fluid-filled “pleural cavity,” a dome-shaped “diaphragm,” and an inflated “lung” at rest. The model can be used to tackle some misconceptions about ventilation as well as to learn some difficult concepts such as the negative pleural pressure and pneumothorax.

Download Full-text

Evaluation of Adaptive Support Ventilation in Paralysed Patients and in a Physical Lung Model

The International Journal of Artificial Organs ◽

10.1177/039139880402700809 ◽

2004 ◽

Vol 27 (8) ◽

pp. 709-716 ◽

Cited By ~ 11

Author(s):

M. Belliato ◽

A. Palo ◽

D. Pasero ◽

G.A. Iotti ◽

F. Mojoli ◽

...

Keyword(s):

Lung Model ◽

Adaptive Support Ventilation ◽

Support Ventilation ◽

Adaptive Support ◽

Physical Lung Model

Download Full-text

Separation, dispersion, humidification and transport of fibres in a physical lung model

Journal of Aerosol Science ◽

10.1016/0021-8502(92)90447-4 ◽

1992 ◽

Vol 23 ◽

pp. 453-456

Author(s):

M.A. Stoelinga ◽

J.C.M. Marijnissen ◽

B.H. Bibo ◽

V. Prodi

Keyword(s):

Lung Model ◽

Physical Lung Model

Download Full-text

Effect of positive-pressure ventilatory frequency on regional pleural pressure

Journal of Applied Physiology ◽

10.1152/jappl.1988.65.3.1314 ◽

1988 ◽

Vol 65 (3) ◽

pp. 1314-1323 ◽

Cited By ~ 23

Author(s):

R. Novak ◽

G. M. Matuschak ◽

M. R. Pinsky

Keyword(s):

Positive Pressure Ventilation ◽

Lung Ventilation ◽

Pleural Pressure ◽

Positive Pressure ◽

Ventilatory Frequency ◽

Balloon Catheters ◽

Airflow Distribution ◽

Pleural Surface ◽

The Right ◽

Phase Differences

Regional lung ventilation is modulated by the spatiotemporal distribution of alveolar distending forces. During positive-pressure ventilation, regional transmission of airway pressure (Paw) to the pleural surface may vary with ventilatory frequency (f), thus changing interregional airflow distribution. Pendelluft phenomena may result owing to selective regional hyperventilation or phase differences in alveolar distension. To define the effects of f on regional alveolar distension during positive-pressure ventilation, we compared regional pleural pressure (Ppl) swings from expiration to inspiration (delta Ppl) and end-expiratory Ppl over the f range 0-150 min-1 in anesthetized, paralyzed, close-chested dogs with normal lungs. We inserted six pleural balloon catheters to analyze Ppl distribution along three orthogonal axes of the right hemithorax. Increases in regional Ppl were synchronously coupled with inspiratory increases in Paw regardless of f. However, at a constant tidal volume and percent inspiratory time, end-expiratory Paw and Ppl increased in all regions once a f threshold was reached (P less than 0.01). Supradiaphragmatic delta Ppl were less than in other regions (P less than 0.05), but thoracoabdominal binding abolished this difference by decreasing thoracoabdominal compliance. We conclude that the distribution of forces determining dynamic regional alveolar distension are temporally synchronous but spatially asymmetric during positive-pressure ventilation at f less than or equal to 150/min.

Download Full-text

Expiratory automatic endotracheal tube compensation reduces dynamic hyperinflation in a physical lung model

Critical Care ◽

10.1186/cc7693 ◽

2009 ◽

Vol 13 (1) ◽

pp. R4 ◽

Cited By ~ 6

Author(s):

Christoph Haberthür ◽

Annekathrin Mehlig ◽

John F Stover ◽

Stefan Schumann ◽

Knut Möller ◽

...

Keyword(s):

Endotracheal Tube ◽

Lung Model ◽

Dynamic Hyperinflation ◽

Tube Compensation ◽

Physical Lung Model

Download Full-text

The Physical Lung Model – the Sensor Network

IFAC Proceedings Volumes ◽

10.3182/20130925-3-cz-3023.00062 ◽

2013 ◽

Vol 46 (28) ◽

pp. 40-45

Author(s):

Ivan Krejčí

Keyword(s):

Sensor Network ◽

Lung Model ◽

Physical Lung Model

Download Full-text

Speed of collapse of the non-ventilated lung during single-lung ventilation for thoracoscopic surgery: the effect of transient increases in pleural pressure on the venting of gas from the non-ventilated lung

Anaesthesia ◽

10.1046/j.1365-2044.2001.02211.x ◽

2001 ◽

Vol 56 (10) ◽

pp. 940-946 ◽

Cited By ~ 14

Author(s):

J. Pfitzner ◽

M. J. Peacock ◽

R. J. D. Harris

Keyword(s):

Thoracoscopic Surgery ◽

Lung Ventilation ◽

Pleural Pressure ◽

Single Lung Ventilation

Download Full-text

The Use of 81mKr Gas for the Measurement of Absolute Regional Lung Ventilation

Nuklearmedizin ◽

10.1055/s-0037-1620600 ◽

1977 ◽

Vol 16 (01) ◽

pp. 13-17 ◽

Cited By ~ 1

Author(s):

Ž. Bajzer ◽

Š. Spaventi ◽

J. Nosil

Keyword(s):

Experimental Data ◽

Respiratory System ◽

Healthy Subjects ◽

Gamma Camera ◽

Lung Ventilation ◽

Lung Model ◽

Regional Ventilation ◽

Scintillation Gamma ◽

Regional Lung ◽

Regional Lung Ventilation

SummaryIn this paper a new method of using 81mKr for the measurement of specific absolute regional lung ventilation is described. Experimental data suitable for the calculation of quantitative regional ventilation are provided using an adequate respiratory system for 81mKr dosage and a scintillation gamma camera interfaced to a digital computer.A simple mathematical lung model for the inhalation of 81mKr is used to determine the specific ventilation and the parameters proportional to the ventilation for the whole lung and different lung regions in patients and in healthy subjects.The lung count rate for a given region correlated well with the ventilation of that region. Clinical examples are given and discussed.

Download Full-text

Simulation of regional lung emptying during slow and forced expirations

Journal of Applied Physiology ◽

10.1152/jappl.1975.39.2.191 ◽

1975 ◽

Vol 39 (2) ◽

pp. 191-198 ◽

Cited By ~ 9

Author(s):

J. Pardaens ◽

K. P. van de Woestijne ◽

J. Clement

Keyword(s):

Pressure Gradient ◽

Lung Volume ◽

Lung Model ◽

Pleural Pressure ◽

Single Breath ◽

Volume Curve ◽

Regional Lung ◽

Flow Volume Curve ◽

Washout Curves

Regional lung emptying was simulated by means of a bialveolar lung model. The influence of bronchial asymmetry and the vertical pleural pressure gradient was evaluated. The model suggests that 1) in vivo the influence of the pleural pressure gradient prevails over that of the bronchial asymmetry; 2) in the presence of this gradient, the shape of phases III and IV of the single-breath washout curves obtained following inspiration of a tracer gas bolus at residual volume is determined by the recoil pressure-volume curve of the lung, by the vertical displacements of the alveoli, and,, at higher flow rates, by the elastic characteristics of the airways; 3) if the pleural pressure gradient is independent of lung volume and of flow rate, the factors mentioned in 2 suffice to produce single-breath washout curves (phases III and IV) and regional vs. overall lung volume relationships corresponding to those observed in vivo; 4) the configuration of the maximal expiratory flow-volume curve is relatively insensitive to pulmonary and bronchial asymmetry, at least in healthy individuals.

Download Full-text