I. Material introduction.
1. Flocked swab: made of nylon fiber flocking technology, the front end is coated with short nylon fibers fixed in a vertical manner, making the entire sampling swab sampling area without absorption holes, sampling samples will not be scattered and retained in the fibers, which is conducive to faster and more efficient elution. Traditional cotton swabs do not completely collect and elute samples, while flocked swabs can elute 95% of the sample. Therefore, it is more widely used.
2. Swab swabs: Swab swabs use sterile cotton wrapped around a wooden stick or plastic rod, which is increasingly not used for sample collection due to the low release rate of cotton, a natural material for samples, and the fact that some of the natural fatty acids in it can be damaging to microorganisms.
3. rayon head swab: rayon is a synthetic fiber manufactured through wood pulp. Although classified as a synthetic fiber, it is essentially a natural material. Compared to cotton, rayon is generally used for sampling for diagnostic tests because the manufacturing process removes substances that could damage the sample or react during transport and handling of the sample.
4. polyester fiber head swab: polyester fiber swab head material used is polyester long fiber winding, first introduced by DuPont in the field of medical testing. Polyester fibers are proven for microbial collection, rapid diagnostics, and PCR testing. Polyester swabs have a high release rate, but cost more than cotton and rayon swabs.
5. Foam-tipped swabs: Swabs made with medical-grade polyurethane are an excellent material for diagnostic use and are particularly suitable for cell sampling. This material absorbs well for hydrophilic substances and poorly for hydrophobic substances, and is mostly used in scenarios where chemical resistance is required, as well as for DNA and microbial sampling.
Introduction to sampling swabs and their sterilization
Second, the sampling site introduction.
Nasal swab: nasal sampling.
Pharyngeal swab: sampling of the pharynx.
Nasopharyngeal swab: sampling through the nasal cavity to the pharynx.
Third, the safety factor and material: ordinary people can operate, the current market new crown self-test products generally use nasal swabs, polyester fiber head is preferred.
Pharyngeal swab: requires professional operation, because the throat area is more prone to injury, flocked swab is preferred.
Must be operated by professionals, through the nasal cavity to the throat need to be very careful, the general Western physique is easier to accept, the Oriental acceptance is lower.
