What Are the Different Types of Nebulizers?
Nebulizers are medical devices that turn liquid medicine into a mist that you can then easily inhale. For those who struggle with respiratory illnesses – like asthma and chronic obstructive pulmonary disease (COPD)– nebulizers function to deliver medications deep into the lungs. Nebulizers are especially useful for young children or individuals unable to use other devices like metered dose inhalers, and for those who prefer nebulizers.
Inhalation devices have existed for centuries and the earliest technologies were developed from papyrus around 1554 BCE. Technology advanced quickly from the 1850s to the 1950s, as innovators learned how to atomize medicine in liquid form and develop spray inhalers. People with asthma began using handheld atomizers in the early 1900s, and the first pressurized metered-dose inhaler hit the market in 1955.
Nebulizers have come a long way since the 1950s, and patients can now choose between a variety of table-top models that make it easier to administer their breathing treatments at home, like jet nebulizers, vibrating mesh, and ultrasonic models. Patients also have access to portable and travel-friendly nebulizers – like the PARI Trek S Portable Nebulizer System – which can be used on the go. Many adult patients prefer to use a handheld nebulizer, while nebulizers with masks are available for children who cannot use a mouthpiece.
Vibrating mesh are the newest nebulizers that operate silently to create medicated aerosols for patients to inhale. Nebulizers today produce fine aerosol particles that you can easily inhale deep into your lungs, where the medication then works to treat asthma, COPD, cystic fibrosis, and other respiratory conditions.
Types of Nebulizers
There are three main types of nebulizers available today: jet, ultrasonic, and vibrating mesh or membrane. Each type of nebulizer system produces medicated aerosol in a slightly different way to deliver these particles deeply into the lungs. Other differences between these types of nebulizers are their efficiency and the amount of medication they deliver to the lungs.
Nebulizer medications come in different formulations. Many come in the form of a solution, while some are suspensions. In a solution, the drug mixture is completely dissolved in the formulation, which makes it easy to aerosolize. Drug particles are not completely dissolved in a suspension formulation, which makes it difficult for some nebulizer types to aerosolize.
When choosing a nebulizer, consider factors such as:
- Portability: Some models are compact and battery-operated, ideal for travel or on-the-go use.
- Noise level: Mesh nebulizers are generally the quietest, while jet nebulizers tend to be louder.
- Treatment time: Mesh nebulizers and breath-enhanced jet nebulizers often deliver medication faster than other types.
- Maintenance requirements: Some nebulizers require more frequent cleaning and part replacements.
- Cost: Prices range from affordable jet nebulizers to more expensive mesh models.
- Compatibility with prescribed medications: Ensure the chosen nebulizer can effectively deliver your specific medication.
Ultimately, the efficiency of a nebulizer depends on how much of the drug can reach the lungs. Residual volume, or the amount of unused medication remaining in the medicine cup at the end of your treatment is one consideration. Some types of nebulizers leave very little residual volume, which makes them more efficient because almost all of the drug is delivered to the lungs.
Here is a complete breakdown of the different types of nebulizers to choose from, to help patients find the system that is right for them.
What Is a Jet Nebulizer?
Jet nebulizers use compressed gas to make medicated mist. These nebulizers deliver this gas through a pressurized stream of air, down a narrow tube or channel, and through an opening to create a jet. The movement of the air creates a vacuum that pushes the liquid medication out of the nebulizer, facilitated by the air compressor.
Delivering compressed gas through a jet causes an area of negative pressure that draws the liquid medicine up the tube or channel, in what scientists refer to as the Bernoulli effect. The air flowing forces the solution onto the surface of a baffle. The baffle breaks down the solution into small droplets, measuring 1 to 5 micrometers, which a patient can easily inhale.
Advantages of Jet Nebulizers
- Cost-Effective: Jet nebulizers are generally the most affordable type of nebulizer.
- Versatility: They can deliver a wide range of medications, including those that cannot be administered by handheld inhalers.
- Ease of Use: Simple operation makes them suitable for patients of all ages, including children and the elderly.
- Medication Compatibility: Jet nebulizers can handle both solutions and suspensions effectively.
Jet nebulizers are inexpensive, easy to use, and can deliver a variety of medications that cannot be administered by handheld inhalers.
Ultrasonic Nebulizers
Ultrasonic nebulizers do not use airflow to form an aerosol. Instead, these nebulizers use ultrasonic sound waves to create a vibration that breaks down the liquid into tiny particles.
More specifically, these nebulizers use a vibrating piezoelectric crystal to create ultrasonic sound waves. Certain crystals are piezoelectric, which means they generate an electric charge when compressed or struck. These piezoelectric crystals oscillate (or vibrate) at different rates depending on their size. As the crystal vibrates back and forth, it generates an electrical charge.
A vibrating piezoelectric crystal can produce cavitation, which is the formation of vapor bubbles at the surface of the liquid. Cavitation causes ultrasonic waves, measuring 1.63 MHz, which generate aerosols. A fan or the patient’s own inhalation then draws the aerosol into their lungs.
Vibrating Mesh or Membrane Nebulizers
Vibrating mesh nebulizers are also driven by a piezo element, but they use the energy of ultrasonic frequencies to vibrate mesh to generate a dense aerosol.
As the liquid passes through microscopic holes in the membrane, the vibrating action generates medicated aerosol. In contrast, ultrasonic nebulizers produce ultrasonic waves directly into the solution, which produces aerosol on the surface of the liquid.
Mesh nebulizers present a number of advantages, as well. Mesh nebulizers produce consistent aerosol particles that reach deep into the lungs. Some mesh nebulizers are highly specialized, and these devices allow for custom adjustments to increase the delivery efficiency of specific drugs. For example, the size of the mesh pores, the aerosol chamber, and the reservoir can be adjusted based on the characteristics of a specific drug formulation. The output rate can be adjusted for different drugs to improve the speed of delivery of various aerosol medications to patients.
Patients may prefer mesh nebulizers because these devices are fast, quiet, portable, and easy to use. Mesh nebulizers also have a self-contained power source.
Mesh nebulizers do have some drawbacks, though. Mesh nebulizers can clog when nebulizing viscous solutions if not properly cleaned or maintained. If you choose a mesh nebulizer, it will be important to follow the manufacturer’s instructions for proper cleaning to prevent any clogging of the mesh or tubing.
Ultrasonic Nebulizers vs Jet Nebulizers vs Mesh Nebulizers
While jet nebulizers are often a preferred method of treatment for those with pulmonary and respiratory diseases, the machines are usually larger and require a source of power to function. Ultrasonic nebulizers have many limitations compared to jet nebulizers. Unlike jet nebulizers, they cannot deliver suspensions. Therefore, they should not be used with suspension drug formulations.
Since both ultrasonic and mesh nebulizers use ultrasonic waves to create the medicated mist, many people confuse these two different types of nebulizers. This is especially true when it comes to the delivery of suspension formulations. Some assume that, like ultrasonic nebulizers, mesh nebulizers cannot deliver suspensions.
When you choose a PARI nebulizer from Nebology, you’re buying clinically proven systems from a trusted name. With our nebulizers – like the PARI eRapid Nebulizer System – treating respiratory diseases is quick, comfortable, and effective. For more information on the various types of nebulizers and which system is best for you, speak with your respiratory professional.
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