Tidal volume measurement error in pressure control modes of mechanical ventilation: A model study

2016 ◽  
Vol 75 ◽  
pp. 235-242 ◽  
Author(s):  
Robert L. Chatburn ◽  
Eduardo Mireles-Cabodevila ◽  
Madhu Sasidhar
Keyword(s):  
Mechanical Ventilation ◽  
Measurement Error ◽  
Tidal Volume ◽  
Pressure Control ◽  
Volume Measurement ◽  
Model Study

scholarly journals Management of Intraoperative Mechanical Ventilation to Prevent Postoperative Complications after General Anesthesia: A Narrative Review

2021 ◽  
Vol 10 (12) ◽  
pp. 2656
Author(s):  
Alberto Fogagnolo ◽  
Federica Montanaro ◽  
Lou’i Al-Husinat ◽  
Cecilia Turrini ◽  
Michela Rauseo ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Tidal Volume ◽  
Pulmonary Complications ◽  
Point Of View ◽  
Whole Body ◽  
Positive End Expiratory Pressure ◽  
Ventilation Strategies ◽  
Harmful Effects ◽  
Ventilation Induced Lung Injury ◽  
Different Levels

Mechanical ventilation (MV) is still necessary in many surgical procedures; nonetheless, intraoperative MV is not free from harmful effects. Protective ventilation strategies, which include the combination of low tidal volume and adequate positive end expiratory pressure (PEEP) levels, are usually adopted to minimize the ventilation-induced lung injury and to avoid post-operative pulmonary complications (PPCs). Even so, volutrauma and atelectrauma may co-exist at different levels of tidal volume and PEEP, and therefore, the physiological response to the MV settings should be monitored in each patient. A personalized perioperative approach is gaining relevance in the field of intraoperative MV; in particular, many efforts have been made to individualize PEEP, giving more emphasis on physiological and functional status to the whole body. In this review, we summarized the latest findings about the optimization of PEEP and intraoperative MV in different surgical settings. Starting from a physiological point of view, we described how to approach the individualized MV and monitor the effects of MV on lung function.

scholarly journals Patient-Ventilator Synchrony and Tidal Volume Variability using NAVA and Pressure Support Mechanical Ventilation Modes

2011 ◽  
Vol 44 (1) ◽  
pp. 569-574
Author(s):  
Katherine T. Moorhead ◽  
Lise Piquilloud ◽  
Bernard Lambermont ◽  
Jean Roeseler ◽  
J. Geoffrey Chase ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Tidal Volume ◽  
Pressure Support ◽  
Ventilation Modes ◽  
Ventilator Synchrony

scholarly journals Low-Cost Differential Pressure Spirometry for Emergency Ventilator Tidal Volume Sensing

2020 ◽  
Author(s):  
Jordan Edmunds ◽  
Mauricio J Bustamante ◽  
Samuel J Raymond ◽  
David B Camarillo ◽  
David K Piech ◽  
...  
Keyword(s):  
United States ◽  
Tidal Volume ◽  
Pressure Sensor ◽  
Low Cost ◽  
Invasive Mechanical Ventilation ◽  
The United States ◽  
Volume Measurement ◽  
Close Monitoring ◽  
Cost Differential ◽  
Volume Measurements

COVID-19 has become a significant burden on the healthcare systems in the United States and around the world, with many patients requiring invasive mechanical ventilation (IMV) to survive. Close monitoring of patients is critical, with total volume per breath (tidal volume) being one of the most important data points. However, ventilators are complex and expensive devices, typically in the range of tens of thousands of US dollars, and are challenging to manufacture, typically requiring months. Solutions which could augment the ventilator supply rapidly and at low cost in the United States and elsewhere would be valuable. In this paper, we present a standalone tidal volume measurement system consisting of a D-Lite spirometer, pressure sensor, microcontroller, and tubing with a cost of parts less than $50 USD. We also provide a model to predict the error in tidal volume measurements based on the pressure sensor used and the flow during ventilation. We validate this system and show that the tidal volume accuracy for flows above 10L/min was within 10%. We envision this system being used to increase the ventilator supply in resource-constrained settings.

scholarly journals Thrombomodulin protects against lung damage created by high level of oxygen with large tidal volume mechanical ventilation in rats

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Yoshiaki Iwashita ◽  
Erquan Zhang ◽  
Junko Maruyama ◽  
Ayumu Yokochi ◽  
Yasuharu Yamada ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Tidal Volume ◽  
Lung Damage ◽  
Large Tidal Volume ◽  
High Level

scholarly journals Tilt error in cryospheric surface radiation measurements at high latitudes: a model study

2016 ◽  
Vol 10 (2) ◽  
pp. 613-622 ◽  
Author(s):  
Wiley Steven Bogren ◽  
John Faulkner Burkhart ◽  
Arve Kylling
Keyword(s):  
Measurement Error ◽  
Total Error ◽  
Surface Radiation ◽  
Cloud Optical Depth ◽  
Model Study ◽  
Tilt Error ◽  
Total Measurement Error ◽  
Spectral Ranges ◽  
Radiation Measurements

Abstract. We have evaluated the magnitude and makeup of error in cryospheric radiation observations due to small sensor misalignment in in situ measurements of solar irradiance. This error is examined through simulation of diffuse and direct irradiance arriving at a detector with a cosine-response fore optic. Emphasis is placed on assessing total error over the solar shortwave spectrum from 250 to 4500 nm, as well as supporting investigation over other relevant shortwave spectral ranges. The total measurement error introduced by sensor tilt is dominated by the direct component. For a typical high-latitude albedo measurement with a solar zenith angle of 60°, a sensor tilted by 1, 3, and 5° can, respectively introduce up to 2.7, 8.1, and 13.5 % error into the measured irradiance and similar errors in the derived albedo. Depending on the daily range of solar azimuth and zenith angles, significant measurement error can persist also in integrated daily irradiance and albedo. Simulations including a cloud layer demonstrate decreasing tilt error with increasing cloud optical depth.

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