Cannula in form of a headset for controlling patient oxygen levels
The pilot program is supported on an automatic oxygen tank flow control by sensing user exhalation. The cannula has the form of a headset for greater comfort.Manizales, 03 de junio de 2016 — Agencia de Noticias UN-
“The sensor constantly measures the room temperature as a reference and compares it to the temperature of the patient’s/user’s respiration. When there is an exhalation, the sensor automatically identifies the change and sends a signal,” said Román Moreno, the student who engineered the prototype along with Geraldine Ballesteros and Manfred Martínez, all Universidad Nacional de Colombia (UNal) in Manizales Electronics Engineering students.
According to the authors of the proposal, the valve interrupts the airflow in a cyclic manner, in other words it allows a minimum flow (as a safety measure) when the sensor identifies a temperature difference between oxygen, exhaled water vapor and room temperature.
“This difference is calculated using an algorithm which then sends a controlling signal to the valve. When the person exhales, air should not be supplied, then in a matter of seconds airflow is restored,” they added.
The autonomous system is an initiative which hopes to diminish the daily costs of purchasing oxygen tanks for oxygen-therapy dependent people.
Therefore as the students claim, the tests substantiated that the oxygen tanks lasted for up to 30% more compared to conventional systems which have no controlling procedures.
“An oxygen tank costs COL $14.000 (US $4.53) and lasts an average of two hours, depending on the need of the patient. Therefore we saw the need to design a system to contribute to savings through an improved oxygen supplying system,” said Román.
Some patients interviewed said that maintaining a constant supply of oxygen is very expensive and added to the limiting fact of not having the sufficient storage capacity, requires constant refilling which can result very costly.
Towards the future to market the prototype, the students think it is essential to form alliances with Colombian Health Providing Entities (EPS, for its Spanish acronym), oxygen tank distributors and patients with respiratory issues.
For them the proposal is successful because it provides comfort, transportation and usage easiness; furthermore they will provide personal support to patients or users while they adapt to the system.
The prototype may be used by any person, regardless of their age and exposure to highly contaminated environments or extreme weather which may affect their respiratory cycle.(Por: Fin/IJR/MLA/APBL