The end treatment of disposable nasal cannula is the basic guarantee to avoid nasal damage. The nasal mucosa is delicate and sensitive. If there are burrs or edges on the end of disposable nasal cannula, it is very easy to scratch the mucosa during insertion, causing pain or bleeding. The end of disposable nasal cannula that has been specially treated will be polished to be round and smooth, which can reduce friction and pressure when in contact with the mucosa. Even if the patient turns his head or adjusts the catheter, it can avoid mechanical damage caused by sharp edges, so that disposable nasal cannula always remains gentle when in contact with the nasal cavity.
The smooth treatment of the end of disposable nasal cannula can reduce the risk of adhesion with the inner wall of the nasal cavity. When the end is rough, it is easy to adhere to mucosal secretions. When the disposable nasal cannula is pulled out or moved, it may pull the mucosa and cause damage. The smooth end has low surface tension and is not easy to adhere to secretions, allowing the disposable nasal cannula to move flexibly in the nasal cavity and reduce the chance of adhesion. This feature is particularly important for patients who wear disposable nasal cannulas for a long time, as it can prevent the tearing force caused by adhesion from damaging the mucosa.
The softness of the end of the disposable nasal cannula can adapt to the complex structure inside the nasal cavity. The nasal cavity is not a straight passage, but has curved and narrow parts. A hard end may hit the side wall of the nasal passage, causing compressive damage. The softened end of the disposable nasal cannula can slightly deform with the shape of the nasal cavity, fit the curve of the nasal passage, avoid forming a hard resistance at the bend, and allow the disposable nasal cannula to enter the nasal cavity naturally, reducing the continuous pressure on the mucosa in the narrow part, and reducing the risk of ischemia and ulcers.
The end opening design of the disposable nasal cannula can reduce the stimulation of the mucosa by the impact of airflow. During oxygen delivery, if the end opening is improper, the high-speed airflow may directly impact the local mucosa, causing dryness and damage. The properly treated end of the disposable nasal cannula (such as opening a side hole) can disperse the airflow, reduce the local flow rate, allow oxygen to enter the nasal cavity gently, and avoid strong airflow scouring the mucosa. This design makes the disposable nasal cannula more friendly to patients with dry rhinitis and reduces the discomfort caused by excessive airflow.
The aseptic treatment of the end of the disposable nasal cannula is the key to preventing infectious damage. During production, the end of the disposable nasal cannula will be strictly sterilized, and the surface will be smooth and non-porous, which can reduce the attachment and growth of bacteria and fungi. If the end is rough or has gaps, it is easy to hide microorganisms, increase the risk of infection, and cause inflammatory damage. The sterile and smooth end of the disposable nasal cannula can reduce the possibility of microbial growth and provide protection for nasal health.
The length and angle of the end of the disposable nasal cannula can avoid irritating the deep tissues of the nasal cavity. The nasopharyngeal mucosa deep in the nasal cavity is more fragile. If the end of the disposable nasal cannula is too long or the angle is inappropriate, it may touch the nasopharynx deeply, causing nausea and other discomfort, or even damage the mucosa. The precisely designed end length and angle can stop the opening of the disposable nasal cannula at the right position, ensuring oxygen delivery without irritating the nasopharynx, and allowing the disposable nasal cannula to function without interfering with the deep mucosa.
The anti-backflow treatment at the end of the disposable nasal cannula can reduce the damage caused by secretion backflow. When the patient coughs or swallows, nasal secretions may flow back into the end of the catheter. If there is no blocking structure, the secretions will accumulate in the disposable nasal cannula, breed bacteria and flow back into the nasal cavity, causing infection. The end of some disposable nasal cannulas has a fine anti-backflow structure, which, combined with a smooth surface, can reduce backflow and siltation, keep the catheter clean, reduce the risk of retrograde infection, and indirectly protect the nasal mucosa.
