Volume Control of Low-Cost Ventilator with Automatic Set-Point Adaptation

Menner, Marcel; Tachatos, Nikolaos; Daners, Marianne Schmid; Pasquier, Cosima du; Lumpe, Thomas S.; Shea, Kristina; Carron, Andrea; Zeilinger, Melanie N.

doi:10.23919/ecc54610.2021.9655092

Cited by 4 publications

(6 citation statements)

References 7 publications

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“…In the ventilator system, we use the breath ventilator a passive value, and a high-efficiency particulate air filter. Actuators and sensors to develop ventilator devices [10]. The system consists of two gas inlets for hospitalsupplied O2 and ambient air supplied through a blower assembly respectively, a mixing tank with safety valves, pressure sensors, humidity exchanger, filters, and standard inhalation and exhalation [11].…”

Section: Methodsmentioning

confidence: 99%

Low-Cost Ventilator Using Pic

2023

IRJMETS

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This paper considers a low-cost ventilator that is based on a manual resuscitator bag (Ambu bag) to pump air into the lung of a patient who is physically unable to breathe. To maintain the pressure of oxygen level to improve the patients breathing by regulating the flow of oxygen in the lungs as an intensive therapy. A contradictory motion is used by a ventilator to inflate the lungs by pumping type motion. The ventilator functions while not a human operator because it delivers breaths through the compression of an associate degree orthodox bag-valve mask. It satisfies its energy wants from an electrical motor having a battery power of three to twelve volts DC. Different functions got to be performed for the aim of ventilation i.e. pressure and needed range of breaths per minute are managed by a simple-to-use input board comprising of buttons. Adjust the time duration for inhalation to exhalation ratio. The low-cost ventilator design oxygen sensor and pressure sensor controlled by the microcontroller. This project work on a mechanical method to provide oxygen to the patient. This project gives comfortable treatment to the patient, and monitors and controls the pressure of oxygen level.

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Section: Methodsmentioning

confidence: 99%

Low-Cost Ventilator Using Pic

2023

IRJMETS

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“…The HEV ventilator is based on a controlled valve system with a buffer reservoir in which the O 2 concentration of the supplied air can be adjusted. The volume-controlled breathe ventilator ( 13 ) is built on the concept of the MIT E-Vent ( 14 ) and consists of a resuscitator bag (AmbuBag, Ambu, Ballerup, Denmark), which is periodically compressed by two paddles. The Hamilton T1 (Hamilton, Bonaduz, Switzerland) was included as a reference ventilator and was tested using the same test protocol as the PDVs.…”

Section: Methodsmentioning

confidence: 99%

Testing of pandemic ventilators under early and agile development

Tachatos

Steffen

Zander

et al. 2022

Front. Med. Technol.

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Aiming to address clinical requirements subsequent to SARS-CoV-2-related pulmonary disease, multiple research groups and industry groups carried out intensive studies to develop pandemic ventilators (PDVs). In vitro testing to critically evaluate the specific performance of the developed apparatuses is an essential requirement. This study presents a test protocol which promotes a test-oriented, iterative, and agile assessment and consecutive development of such PDVs. It allows for fast identification of specific characteristics of each PDV in the individual test features. The test protocol includes an evaluation of the accuracy of control systems and instruments at changing parameters, the oxygen dynamics, and the response to trigger signals. The test environment is a mechanical lung, which allows reproducing various lung mechanics and to simulate active breathing cycles. A total of three PDVs that are under development were iteratively tested, with a Hamilton T1 as a reference. Continuous testing of the PDVs under development enables quick identification of critical application aspects that deserve further improved. Based on the present test protocol, the ventilators demonstrate a promising performance justifying continued development.

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“…The TestChest can mimic different lung mechanics by varying the C RS and airway resistances. 9,[19][20][21] Three pressure sensors were placed at the outlet of the ventilator, at the Y-piece, and inside the trachea to measure the ventilator pressure, Y-piece pressure, and intratracheal pressure. The flow sensor was placed at the Y-piece.…”

Section: Experimental Test Setupmentioning

confidence: 99%

A Comparison of Proximal and Tracheal Airway Pressures During Pressure Controlled Ventilation

Zander,

Stankovic,

Meboldt

et al. 2023

Respir Care

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BACKGROUND: Airway pressure is usually measured by sensors placed in the ventilator or on the ventilator side of the endotracheal tube (ETT), at the Y-piece. These remote measurements serve as a surrogate for the tracheal or alveolar pressure. Tracheal pressure can only be predicted correctly by using a model that incorporates the pressure at the remote location, the flow through the ETT, and the resistance of the ETT if the latter is a predictable function of Y-piece flow. However, this is not consistently appropriate, and accuracy of prediction is hampered. METHODS: This in vitro study systematically examined the ventilator pressure in dependence of compliance of the respiratory system (C RS ), inspiratory time, and expiratory time during pressure-controlled ventilation by using a small intratracheal pressure sensor and a mechanical lung simulator. Pressures were measured simultaneously at the ventilator outlet, at the Y-piece, and in the trachea during pressure-controlled ventilation with a peak inspiratory pressure of 20 cm H 2 O and a PEEP of 5 cm H 2 O while changing C RS (10,30, 60, 90, and 100 mL/cm H 2 O) and varying inspiratory time and expiratory time. RESULTS: Tracheal pressures were always lower (maximum 8 cm H 2 O during inspiration) or higher (maximum 4 cm H 2 O during expiration) than the pressures measured proximal to the ETT if zero-flow conditions were not achieved at the end of the breathing cycles. CONCLUSIONS: Dependent on C RS and the breathing cycle, tracheal pressures deviated from those measured proximal to the ETT under non-zero-flow conditions. Intratracheal pressure and pressure curve dynamics can differ greatly from the ventilator pressure, depending on the ventilator setting and the C RS . The small pressure sensor may be used as a measurement method of tracheal pressure via integration onto an ETT.

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Volume Control of Low-Cost Ventilator with Automatic Set-Point Adaptation

Cited by 4 publications

References 7 publications

Low-Cost Ventilator Using Pic

Low-Cost Ventilator Using Pic

Testing of pandemic ventilators under early and agile development

A Comparison of Proximal and Tracheal Airway Pressures During Pressure Controlled Ventilation

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