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Solutions to Medical Problems Solved by the Resilience Mechanical Ventilator

July 25, 2020

The process to validate and start the production of the device created by Cedenna engineers and postgraduate doctors from the University of Santiago is already underway. The device was specially built for the treatment of patients with Covid-19 since it is not based on Ambu-type models.

This ventilator is designed to solve problems such as a shortage of medical personnel, high oxygen consumption within the hospital network and automatically respond to the needs of patients affected by Covid to avoid lung damage due to excess and lack of pressure.

The VR Resilience mechanical ventilator, developed by engineers from the Center for the Development of Nanoscience and Nanotechnology (Cedenna), and doctors from the Postgraduate and Postgraduate Studies Directorate of the Faculty of Medical Sciences of the University of Santiago (Usach), was chosen by Corfo among the projects that will receive support to scale up their production.

“It is a recognition of the effort of this multidisciplinary team of physicists, engineers and doctors who worked on creating a device with unique characteristics for the treatment of patients with Covid-19,” said Dr. Dora Altbir, director of Cedenna.

The development of the VM Resilience “has considered all the needs for a correct therapy for patients with COVID-19,” says Dr. Pedro Chaná, from the Directorate of
Postgraduate and Postgraduate Medical Sciences at Usach, and explains that the device uses a sophisticated system of sensors and valves, different, for example, from Ambu-type models. This is because the MIT-designed emergency ventilator (based on Ambu technology) is aimed at initial support ventilation and not prolonged ventilation, as required by Covid patients.

Specific benefits

Omar Daud, a doctor of mechatronic engineering and researcher at Cedenna explained that in the case of the “Ambu” system: “the elastic properties change constantly with use and, therefore, the air flow becomes increasingly difficult to control correctly. This situation could become catastrophic in long-term use without very sophisticated control. For this and other considerations, it was decided to prototype a ventilator with an arrangement of valves and sensors that uses the gas network of hospitals. ”

Another advantage of the VM Resilience prototype is its oxygen consumption, which is more efficient than that of turbines. “This data is important because the great
The number of people in ventilation has led to an unusual consumption of oxygen, stressing the gas network of hospitals. In this sense, VM-Resilience uses only the
oxygen that the patient requires ”, alerts the engineer and doctor in Physics of Cedenna, Álvaro Espejo.

The lack of healthcare professionals marked a new challenge for Cedenna’s interdisciplinary team, who automated some ventilator functions, allowing a single doctor to manage more ventilators at a time. “In recent days, the lack of health professionals has become a critical problem. The VM Resilience prototype is computerized with an integrated control panel with a touch screen and a friendly and intuitive user interface, so that health personnel can easily manage it, “adds Dr. Gabriel de la Fuente, doctor from the Usach Medical Sciences Graduate School, with extensive experience in treating critically ill patients. The Resilience mechanical ventilator uses the PRVC ventilation mode, which is recommended for the treatment of critically ill patients by COVID, since it reduces the possibility of the generation of barotrauma.

Dr. De la Fuente comments that “VM Resilience is an important technological leap for the health of our country. Its computerized valve system allows the same digital control as commercial equipment. It has advantages and is more reliable than the Ambu type manual respirator bag based system. In the tests we’ve done, it has worked perfectly for the needs of Covid-19 patients. ”

The VM Resilience appliance was built to run uninterrupted for weeks. This is very important in the treatment of patients with Covid19, because the
Accumulated international experience indicates that in some cases patients can stay up to three weeks connected to the ventilator.

The device has already successfully passed various tests. The next steps for the VM Resilience are to complete the validation phases defined by the Ministry of Science, Technology, Knowledge and Innovation so that it can enter the production phase at scale.

The cost of this mechanical fan is estimated to be about 7 times less than the devices that have been imported and the supplies with which the VM Resilience was manufactured are in the local market.


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