International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 05 | May 2022
p-ISSN: 2395-0072
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PRELIMINARY DESIGN AND DEVELOPMENT OF A MEDICAL HUMIDIFIER Chetan Meshram1,Chirag Jain2,Sanket Dhawle3,Harshal Dharmik4,Aalhad Morabkar5,Dr.Pramod Lanjewar6 1,2,3,4,5U.G.
Student, Dept. of Mechanical Engineering, St. Vincent Pallotti college of Engineering and Technology Nagpur, Maharashtra, India 6Professor, Dept. of Mechanical Engineering, St. Vincent Pallotti college of Engineering and Technology Nagpur, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------RH, the quantity of water vapor in a given volume of gas or partial pressure of water to the saturation vapour pressure at atmospheric temperature and expressed as percentage(%)
Abstract - Breathing assistance required to patient can be
caused by multiple reasons. Assistance to breathing can be required for new-born child or can be matured adult. Thus, this makes impossible to make one standard ventilation system which can treat both and results in high cost and demand of ventilator.
RH =
The human natural way of heating and humidifying the inhaled air is replaced by endotracheal tube(ETT) when they go through invasive type mechanical ventilation. Thus, results in complications to patient’s airways as they become cold and dried by dry gases thar provided by the ventilator and that too severe complications if patient is kept for longer period of time, as will happen in invasive mechanical ventilation and hence, system is needed which can provide proper humidification to the patient airway. Such system exits and that too with various functionality but results in high cost.
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1.2 PRINCIPLES / FACTORS GOVERNING HUMIDIFIER FUNCTION The performance or to say design of humidifier depends on the following four factors[1]
In this research we will undergo the study of humidifier, its working and how we can reduce its pricing. Main study is to make an alternative way to reduce price and not expected to be ready for mass production.
Temperature Surface Area Contact Time Thermal mass
1. Temperature - Temperature being the important factor affecting the performance of a humidifier. More the temperature or more we heat the gas it will hold the water vapour in highest quantity.
Key Words: Humidifier, Nebulizer, breathing, Endotracheal tube (ETT), Ventilator, conductivity, temperature.
2. Surface Area – Water and gas coming out from ventilator should be in contact for long time. This results in designing the humidifier of larger surface area. Pass over humidifier is one of the example which is having large surface area.
1. INTRODUCTION 1.1 HUMIDIFIER
3. Contact Time – Contact time is directly proportional to surface area, more the surface area more will be the contact time which helps the gas to carry enough humidity.
It is the device which adds water vapours and heat to gas which comes from ventilator, in our case from AMBU bag. The amount of water present in gaseous or molecular form in air or gas mixture is termed as Humidity. It can be measured in numerous units, but the two majors are Absolute Humidity(AH) and Relative Humidity(RH).
4. Thermal Mass – The amount of water should be sufficient or must be more than the normal line resulting in greater thermal mass. Increase in thermal mass result in increase of to hold and transfer heat to gases coming from ventilator.
AH, the quantity of water in a given volume of gas and expressed in terms of milligram per litre(mg/L). AH = ------------------------------------------ 1
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