Therefore, knowing the actual V T in the patient's lungs is contingent on the implementation of ventilator algorithms to compute the three aforementioned corrective steps, each potentially amounting to more than 10% variance in the actual vs. Indeed, there is a 12.3% increase in V T when comparing dry air at 20 ☌ in a ventilator and the corresponding V T in the patient lung. Third, correction of V T according to the gas physical conditions is also needed since the inspiratory volume primarily measured by the ventilator corresponds to the device temperature and humidity, which are different from those within the patient lung (37 ☌ and 100% relative humidity). inadvertent modification of tubing or humidifier dimensions) must be taken into account for correction, otherwise, these may result in substantial V T errors. Remarkably, changes in the circuit compliance (e.g. For a typical value of ventilator circuit compliance (2 mL/cmH 2O) 6 and an inspiratory pressure of 25 cmH 2O, the volume of shunted air is 50 mL (≈10% of the typical V T). 5 Second, correction for the compressibility of the ventilator circuit is essential since a fraction of the inspiratory volume measured at the ventilator outlet is shunted by compression and thus not delivered to the patient. For instance, to avoid a 12.5% volume overestimation when changing ventilation from room air to oxygen, the ventilator should automatically correct for the change in pneumotachograph resistance caused by the changes in gas viscosity. First, correct calibration values are required for the flow measuring device (usually a pneumotachograph) according to the oxygen fraction being used. Whereas measuring the pressures characterizing mechanical ventilation (e.g., peak inspiratory or positive end-expiratory pressures) is direct and straightforward using pressure transducers, actual V T measurements are complex since several computations are required. 2 Additionally, V T is required to compute respiratory system compliance or ventilatory ratio, useful indices in the classification of patient phenotype and estimation of prognosis. Indeed, in addition to its contribution to minute volume for optimization of blood gas exchange, appropriate V T strategies are critical to avoid ventilator-induced lung injury in the general context of lung-protective ventilation 1 and when specifically applying ultra-low tidal volume ventilation.
In this context, consistent delivery of the most suitable tidal volume ( V T) to the patient is critical to achieving personalized mechanical ventilation. Mechanical ventilation is the most extensively employed life support intervention among patients with severe respiratory failure of different etiologies. The Journal expresses the voice of the Spanish Respiratory Society of Pulmonology and Thoracic Surgery (SEPAR) as well as that of other scientific societies such as the Latin American Thoracic Society (ALAT) and the Iberian American Association of Thoracic Surgery (AICT).Īuthors are also welcome to submit their articles to the Journal's open access companion title, Open Respiratory Archives.
Furthermore, the Journal is also present in Twitter and Facebook. Manuscripts will be submitted electronically using the following web site:, link which is also accessible through the main web page of Archivos de Bronconeumologia.Īccess to any published article, is possible through the Journal's web page as well as from PubMed, Science Direct, and other international databases. The Journal is published monthly in English. It is a monthly Journal that publishes a total of 12 issues and a few supplements, which contain articles belonging to the different sections.Īll the manuscripts received in the Journal are evaluated by the Editors and sent to expert peer-review while handled by the Editor and/or an Associate Editor from the team. Other types of articles such as reviews, editorials, a few special articles of interest to the society and the editorial board, scientific letters, letters to the Editor, and clinical images are also published in the Journal. Archivos de Bronconeumologia is a scientific journal that preferentially publishes prospective original research articles whose content is based upon results dealing with several aspects of respiratory diseases such as epidemiology, pathophysiology, clinics, surgery, and basic investigation.
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