Medical masks can be classified into different types based on their purpose, including medical protective masks, medical surgical masks, and disposable medical masks. These masks fall within the jurisdiction of medical device management and must comply with the standards set for medical device product registration. The regulatory body responsible for overseeing this is the food and drug supervision and management department at various levels. In general, the packaging of these masks will display a product registration number, indicating that they are intended for single-use only. Let me know if there's anything else I can help with!
Medical protective masks and medical surgical masks are both classified as medical devices and have been subjected to national regulatory management following the SARS epidemic in 2003. These medical devices are categorized under the second classification of medical devices and are strictly monitored.
Medical disposable masks generally have lower filtration efficiency requirements for particles and bacteria compared to medical surgical masks and medical protective masks. Their ability to protect against pathogenic microorganisms is relatively limited. However, they are suitable for one-time hygiene care in everyday environments and can effectively block or protect against non-pathogenic particles such as pollen.
Medical surgical masks are capable of blocking particles larger than 2-4 microns in diameter, providing a basic level of protection for medical staff and related personnel. They effectively prevent the spread of blood, body fluids, and splashes during invasive procedures, making them suitable for use in medical clinics, laboratories, and operating rooms. With a permeability of 18.3% for particles measuring 0.3 microns in diameter, these masks offer a decent level of filtration. Moreover, they possess a high safety factor, exhibiting strong resistance against bacteria and viruses. In addition to aiding in the prevention of influenza and coronavirus transmission, medical surgical masks play a crucial role in limiting patients from infecting others. Although they may not be as effective as N95 masks in preventing infection, their usage significantly reduces the risk of transmission.
According to the testing standards, when 2ml of synthetic blood is sprayed onto the external surface of the face mask under a pressure of 16.0kPa (120mmHg), there must be no penetration of the blood on the interior side of the mask. The efficacy of the mask can be validated by measuring its ability to prevent synthetic blood from passing through the mask. The mask must effectively block and resist the penetration of synthetic blood to achieve its intended purpose.
To ensure adequate protection, it's crucial to make sure that the mask's bacterial filtration efficiency (BFE) is at least 95%. This means that the mask is able to filter out 95% of bacteria, preventing them from entering your respiratory system. It's important to choose a high-quality mask with a high BFE rating to minimize the risk of infection.
The mask should have a particle filtration efficiency (PFE) of at least 30% for non-oily particles. This means that it must effectively filter out a significant portion of these particles to ensure adequate protection.
The maximum allowable pressure difference between the two sides of the mask for gas exchange is 49Pa.