The Mission of A Virus Test Swab

The Mission of A Virus Test Swab

The Mission of A Virus Test Swab

From the sampling point to the testing room, then to the temporary storage point of medical waste.

Then to the hazardous waste centre, to the power plant, and finally to the soil.

A swab for nucleic acid detection completed the task and became a piece of pollution-free ash and fill it in the soil.

At present, we are in a critical period of anti-epidemic.

An ordinary hospital has a maximum of 11,220 samples per day at a single sampling point.

The Mission of A Virus Test Swab

The Mission of A Virus Test Swab

At nine o’clock in the morning, at the nucleic acid testing and sampling service point, citizens who were ready to test lined up.

Everyone wears a mask and consciously separates one meter from each other.

At the beginning of the inspection window, the heavily armed nurses washed their hands with an antiseptic solution.

And then removed a flocked swab about 15 cm long from the packaging bag to take a sample before taking the throat swab.

The nurse opened the collector’s mouth wide, and she skillfully inserted the flocked swab into her pharynx.

Then picked up a sampling tube (virus transport medium) with her left hand. And inserted the collection stick into the sampling tube with her right.

With a little force, the tip of the cotton swab breaks enters the sampling tube, seals it. And throws the long stick into the yellow medical waste bin.

As a testing point for ordinary citizens and inpatients, as an ordinary citizen and inpatients, the use of cotton swabs in an ordinary hospital reached 11,220.

Medical waste treatment forms closed-loop management in nucleic acid testing laboratories.

Take the flocked swab, put the swab head into the sampling tube, and paste a barcode similar to “ID card”. And carefully seal it, put it into a transparent sealed box.

And then send it to the transfer cabin of the PCR laboratory of the Department of Infectious Diseases by staff wearing protective clothing.

The PCR laboratory is under negative pressure, and after the virus enters, it cannot come out. After the outbreak, the PCR laboratory strictly abides by the medical waste treatment process, forming closed-loop management of the laboratory.

An hour later, staff in protective suits transported medical waste out of the ward in sealed yellow bags and sealed with “extremely infectious waste”.

Then, the workers send these medical wastes by trolleys to the medical waste temporary storage area at the nucleic acid collection point 100 meters away. For the medical wastes for nucleic acid testing, he transports an average of about 35 kilograms per day.

We need to place the virus sampling tube for 48 hours during the transfer process

Except for professionals, our PCR laboratory does not allow patients and the public to enter here.

To ensure safety, all medical waste from nucleic acid testing collection points, including swab sticks, is kept here for 48 hours.

After our test results come out and are confirmed to be correct, they will be sent to the hazardous waste treatment centre by a medical waste transfer vehicle.

At ten o’clock in the morning, the staff of the hazardous waste centre arrived at the scene. Unload the empty shipping box and load the ship with medical waste that has been sitting for 48 hours.

The sampling flocked swabs used must be incinerated at high temperatures above 1100°C.

There are two buildings, an incineration workshop and a cooking room, in the yard of the Hazardous Waste Center.

The staff in protective suits skillfully unload boxes of medical waste from the transfer vehicle and load boxes of hazardous waste into bucket elevators.

 

What is Pooled Sample?

What is Pooled Sample Test?

Pooled Sample Test?

With the 2019 coronavirus disease (COVID-19) pandemic, doing a good job in viral nucleic acid detection is the top priority. However, detection of the virus is still limited due to resource constraints. Pooled sample testing offers a way to significantly improve testing power.

“mixed nucleic acid test”  or “Pooled Sample Test”, referred to as “mixed test”.

Which means that two or more samples are mixed and tested. method for positive samples.

     What is the difference between the “mixed collection” of community nucleic acid testing and the “single collection” of the hospital?

    Why do community streets adopt the mixed mining model?

    Under what circumstances should I test individually?

What is pooled COVID testing?

The so-called “mixed detection” of nucleic acid.

Takes throat swab samples from multiple people and puts them together for viral nucleic acid detection.

Pooled Sample Test VTM Kits

Pooled Sample Test VTM Kits

In fact, Medical use of Pooled Samples is common.

In blood collection systems such as apheresis stations.

We use pooled samples to detect the presence of infectious disease antigens and antibodies in pooled samples of multiple people.

There are two modes of “mixed detection”. One is to sample several people, such as 3 or 5 people and put them into the same sampling tube.

The other is to mix samples of the same volume from 3 or 5 people during laboratory testing, also known as “sample mixing”.

From a scientific point of view, the first “mixed sampling” mode will not affect the sensitivity of nucleic acid detection. While the latter mode of mixed detection of samples has a certain impact on the sensitivity of the detection,  the degree of impact is controllable.

In order to detect high-risk groups, such as symptomatic patients and close contacts in fever clinics, we still recommend separate sampling.

For screening of low-risk groups, pooled sample test is our first choice.

Is the mixed detection technology reliable?

Is the “five-in-one” and “ten-in-one” mixed mining detection technology reliable?

“The size of the single-collection tube and the mixed-collection tube are different, and the amount of the preservation solution is also different.

Based on the results of a large number of basic experimental research and practical operations in the previous period.

The increase in the volume of the mixed-collection preservation solution has no effect on the detection results of weakly positive specimens.”

In the case of an extremely low positive rate, the 10-in-1 mixed detection technology is very efficient.

The FDA is aware that there is a great interest in performing testing using pooled samples.

This approach increases the number of individuals who can be tested with the same amount of resources.

What are the benefits of mixed nucleic acid detection?

The hybrid detection of nucleic acid has greatly improved the nucleic acid detection capability, reduced the burden of personal testing costs, and did not affect the time for issuing the test report.

The testing time of a single test and mixed test laboratory is the same, but compared with a single test, the mixed test is more suitable for mass and group screening.

In the case of small-scale outbreaks, the use of mixed detection can improve efficiency, play the role of multiple screening, early diagnosis, reduce transmission, and save social costs.

Whether the population is suitable for mixed testing shall be carried out in accordance with the requirements of the provincial and municipal epidemic prevention and control headquarters,

The medical institutions carrying out the testing must follow the technical requirements and standards of the municipal health department.

Which groups recommend the single purchase and single inspection?

It is worth mentioning that single sampling and single inspection are recommended for specific populations.

The above notice specifically mentioned that COVID-19 nucleic acid 10 in 1 and 5 in one mixed detection technology is suitable for large-scale rapid screening of the low-risk populations, and is more suitable when the overall positive rate of population is low (0.1%).

However, for the detection of high-risk groups such as symptomatic patients, close contacts and people in key areas in fever clinics.

Recommended to adopt single sampling and single detection.

What should I pay attention to when doing pooled sample detection?

1. When going to the testing point for nucleic acid testing, wear a mask, and it is best to prepare one or two spare masks.

2. Two hours before the swab test, it is recommended not to eat to avoid vomiting during the test.

3. When waiting for the test, remember to keep a distance of more than one meter between the front and rear personnel to avoid close contact.

4. Whether it is doing swab testing or getting the report, it needs to be certified as one, so be sure to bring ID cards, receipts and other materials, so as to avoid incomplete materials at that time, which will affect the testing and reporting.

How to do Nasal Swabbing for COVID

How to do Nasal Swabbing for COVID

How to do Nasal Swabbing for COVID

Swab Instructions

Learn about swab testing for COVID-19 and other similar diseases. Thank you for taking the time and paying attention to the instructions below.

1. Open the nasal swab

Flocked Swab

Flocked Swab

Remove the nasal swab from the wrapper by pulling the two ends of the wrapper apart (like you would open a band-aid).
Be careful to only touch the handle, not the tip.

2. Swabbing nose

Flocked Tip Swab Nylon Sterile Nasal Swab Stick

Flocked Tip Swab Nylon Sterile Nasal Swab Stick

Gently insert the entire soft tip of the swab into one nostril until you feel a bit of resistance and rub it in a circle around your nostril 4 times.
Next, gently insert the same swab into the other nostril and rub it around the same way.

3. Put swab in the tube

NASAL SWAB SAMPLING PROCESS

NASAL SWAB SAMPLING PROCESS

Lower the swab, tip first, into the provided tube.
Once the tip is at the bottom, break the swab handle at the top of the tube by bending back and forth.
Screw the red cap on tightly.

Cellmedical-SwabNasalCollectionInstructions

How to Swab For Covid Test

How to Swab For Covid Test

How to Swab For Covid Test

Since the outbreak of novel coronavirus pneumonia, we must have experienced nucleic acid testing. Covid swab test Nucleic acid detection plays a very important role in the process of infection diagnosis of COVID-19. It can not only find asymptomatic patients in the incubation period as much as possible but also greatly reduce the risk of infection.

Nucleic acid detection is so important. Next, Dr Li will take you to have an in-depth understanding of the relevant principles of nucleic acid detection, the difference between mixed collection and single collection of nucleic acid detection, and the matters needing attention in nucleic acid detection, to help you better protect yourself while popularizing knowledge.

To understand nucleic acid detection, we must understand the detection principle. Let’s take a look at its detection principle first.

The doctor is testing the patient's nasopharynx swab

The doctor is testing the patient’s nasopharynx swab

What is the principle of nucleic acid detection?

Nucleic acid, the genetic factor of the virus, is a macromolecular chain composed of four nucleotides. Different molecules represent different nucleotides and form a long chain. Nucleic acid detection is through the detection of nucleic acid in the chain, and this segment of nucleic acid is COVID-19 specific, other viruses do not.

Pcr test nasal swab and an antigen test difference for covid 19

Pcr test nasal swab and an antigen test difference for covid 19

The substance detected by the nucleic acid is the nucleic acid of the virus. At present, the detection technology is mainly through PCR (polymerase chain reaction) technology to detect the nucleic acid of the virus. During the detection, the nucleic acid chain of COVID-19 was used as the detection target, and the target gene sequence was amplified by PCR Test, which was combined with a fluorescent labelled probe added in the test reagent to produce a fluorescence signal.

The three forms of nucleic acid detection have their advantages.

Nasal swab test

This test method is to insert the test swab vertically into the nostril. And gently rotate the swab, stay in the nasal cavity for about 15 seconds, to test.

Flocked Tip Swab Nylon Sterile Nasal Swab Stick

Flocked Tip Swab Nylon Sterile Nasal Swab Stick

Compared with throat swabs, nasal swab testing is more accurate for inexperienced testing personnel. And the risk of exposure is lower. However, it is not suitable for some patients with nasal allergies, high blood pressure and people who take anticoagulation and antiplatelet for a long time.

Throat swab test

At present, the most widely used detection method is also a form that is often used by everyone. During the sampling process, the patient opened his mouth and made an “ah” sound, and the testing personnel used a sterilized cotton swab to gently and quickly wipe the pharyngeal lateral wall and posterior pharyngeal wall of the subject many times.

COVID-19 Testing:PCR swab test,antibody test, and antigen test difference

COVID-19 Testing: Throat swab test

Throat swab testing: Often used in the testing process because it is more convenient and fast to collect, and it is more acceptable to the public, but the risk of exposure is also greater.

Anal swab test

This test method is a method of inserting a test swab into the anus and taking a sample at the fold of the anus or taking a sample at 2 to 3 cm for a new coronavirus test.

Many patients reject anal swab testing, but anal swabs can improve the accuracy of testing for new coronavirus infections to a certain extent. Some patients indeed have negative throat swabs, but positive ones are detected by anal swabs. In some patients, the anal swab test was still positive after the other two tests turned negative.

Anal swab

Anal swab

Why do multiple nucleic acid tests need to be performed?

Multiple nucleic acid tests are necessary for epidemic prevention and control.
A negative nucleic acid test does not mean that the tested person is not at risk of infection. Any detection method has the possibility of errors, especially in high-risk areas. To ensure the accuracy of the inspection results and better prevent and control the spread of the epidemic, multiple rounds of inspections must be carried out. There are also the following reasons for taking multiple rounds of detection:

After virus infection, the human body has a certain value-added period. When testing, if the virus in the body does not reach a certain concentration, we may not detect the virus.

When the specimen was collected, due to the different sampling methods, no virus cells were collected. False-negative specimens can also lead to inaccurate collection results.

Errors in the transportation process and storage of samples for inspection will also affect the results of nucleic acid testing.

Therefore, for risk areas and special populations, multiple rounds of nucleic acid testing must be carried out to more accurately and effectively detect the virus source, so as to better and more accurately prevent and control and identify infected people, and cut off the source of the virus. No matter what kind of inspection process, attention must be paid.

Covid-Nucleic-Acid-Test

Covid Nucleic Acid Test Nasopharyngeal Swab Test

This article
To talk to you in detail
Covid nucleic acid test!

But in the face of the “nucleic acid swab test”
This unfamiliar and familiar word
Do you have many questions?

Image source network

Do you want to do a nucleic acid test when you go back?

Will it be difficult to make an appointment for nucleic acid testing?

How long does it take to get the results of a nucleic acid test at the hospital?

Should I Swab My Throat or Nose for Rapid COVID-19 Tests?

To answer your questions.
Today.
I’m going to tell you.
Those things about nucleic acid testing.

01. What is nucleic acid detection?

At present, nucleic acid detection is the main method for laboratory diagnosis to determine whether a patient is infected with the new coronavirus. It can achieve early detection, early diagnosis, and early treatment. Real-time fluorescent PCR can be used to detect throat swabs, sputum or blood samples. to covid nucleic acid, or detected by viral next-generation gene sequencing.

simply put

Nucleic acid testing is done by

After collecting human secretions

Tested by the instrument

to see if we have the new coronavirus in our body

If so, the test result is positive

On the contrary, if it doesn’t, it’s negative.

02. How to test the COVID swab?

“Sir, oropharyngeal swab, nasopharyngeal swab, and anal swab, which one to choose?”

How do you do a nasopharyngeal swab?

Nasopharyngeal swabs must be performed with the patient sitting upright with the head in an upright position, as this allows for easy visualization and access to the nasal floor perpendicular to the central axis of the patient’s face.

Flocked Tip Swab Nylon Sterile Nasal Swab Stick

Flocked Tip Swab Nylon Sterile Nasal Swab Stick

Insert the swab into the patient’s nose and align it parallel to the nose and the base of the septum. As long as there is no obstruction in the nasal cavity, the swab continues to move in this direction until it reaches the nasopharynx, at which point the tester feels resistance.

Once the swab reaches the nasopharynx, a gentle rotation and two complete 360-degree rotations are recommended to allow secretions from this area to be absorbed.

Once the swab is removed from the patient’s nose, it is immediately inserted into a viral sample containing a viral transport medium. The handle of the swab extending through the opening of the vial was broken off to allow the tube to be closed.

So
Now that there are oropharyngeal swabs and nasopharyngeal swabs
Why add anal swabs?
To answer your questions
Let’s take a look at their respective advantages and disadvantages

The specific operation of the anal swab is as follows:

Soak a flocked swab in saline, insert it 2-3 cm into the anus, wipe from the folds around the anus, or rotate it gently inside the anus, and insert it into a test tube containing saline.

anal swabs

For fecal swab cultures, all of the above requires the use of sterile equipment and placing the swab in a sterile tube.

So
Now that there are oropharyngeal swabs and nasopharyngeal swabs
Why add anal swabs?
To answer your questions.
Let’s take a look at their respective advantages and disadvantages.

Oropharyngeal swab: relatively simple to operate, less irritating, suitable for large-scale screening. Therefore, the nucleic acid test of oropharyngeal swabs is mainly used in the screening of new coronary pneumonia for the epidemic-related population, which is used in the routine nucleic acid test clinic of the First Affiliated Hospital of NTU.

Nasopharyngeal swab: The technical requirements are high, the human body does not feel comfortable, and the accuracy rate is higher than that of the oropharyngeal swab. However, for some asymptomatic or mildly infected people, the condition recovers quickly after infection, and the pharyngeal nucleic acid may not be detected in 3 to 5 days.

Anal swab: high accuracy, reduce missed diagnosis. The study found that the duration of nucleic acid-positive feces or anal swabs of some infected persons is longer than that of the upper respiratory tract. Therefore, anal swab tests will be carried out for key groups such as isolation points or some imported overseas.

In conclusion.
The three swabs have different lengths.
If you have to test an anal swab.
Don’t be shy.
Whatever the swab,
It is a good swab that can accurately identify the virus.

 
DNA Specimen Nylon Fiber Flock Dacron Sample Collection Flocked Swab

DNA Specimen Nylon Fiber Flock Dacron Sample Collection Flocked Swab

During the outbreak of the new coronavirus pneumonia, while everyone is doing personal protection, they are also very concerned about the epidemic situation.

Originally, the social season in winter and spring was a period of the high incidence of common colds and flu, and the most important means to control the epidemic was to screen out the real patients with new coronary pneumonia from many respiratory patients.

The following small series will introduce some common virus sampling detection methods for you.

Nasopharyngeal swab

Collect nasopharyngeal swab specimens within 3 days of the onset of the patient as much as possible.

Measure the distance from the tip of the nose to the earlobe with a swab and mark it with your finger, insert the swab into the nasal cavity in the direction perpendicular to the nose (face), and the swab should be at least half the length from the earlobe to the tip of the nose so that the swab stays in the nose for 15 ~30 s.

Gently rotate 3 to 5 times, quickly put the swab into a sample collection tube containing 2 ml of lysis buffer (the same as the lysis buffer in the nucleic acid extraction kit) or a cell preservation solution containing RNase inhibitors, and insert the swab.

Then break the sterile swab rod near the top, screw the cap tightly and seal it with parafilm.

Oropharyngeal swab

Collect throat swab specimens from patients within 3 days of onset as much as possible. It is advisable to use a sterile flocked swab for sampling, wiping the posterior pharyngeal wall with moderate force, avoiding touching the tongue; quickly put the sterile swab into the collection tube used for collecting nasopharyngeal swabs, and break it near the top Sterile swab rod, screw cap tightly and seal with parafilm.

Anal swab (feces)

For patients with gastrointestinal symptoms such as diarrhea in the early stage of the disease, an anal swab should collect a stool sample (soybean size) of 3-5g.

The specimens were collected in a screw-cap specimen collection tube containing 2 ml of normal saline (RNase inhibitor can be added if available) and sealed with parafilm.

How to collect nasopharyngeal swabs

There is absolutely no need for the sampler to stand directly opposite the patient. Regardless of whether the patient is sitting or lying, right-handed patients can stand on the right side of the patient, and left-handed patients can stand on the left side for sampling operations.

The advantage of standing on the side is that if the patient has a cough, sneeze, etc., it can be avoided in time.

After the nasopharyngeal swab is passed through the nostrils.

It is perpendicular to the coronal plane of the head or the face and penetrates deep from the inferior meatus to the posterior wall of the nasopharynx, and it is enough to feel the wall.

The nasopharyngeal swab enters the nasal cavity to a depth of approximately the distance from the tip of the nose to the earlobe (see figure).

The “American Society for Microbiology Clinical Microbiological Specimen Submission Guidelines. ” We ask to twist the nasopharyngeal swab on the nasopharyngeal mucosa, hold it for 10-15 seconds, and then take out. Children’s cooperation is poor.

We generally take out the Flocked swab in three to five seconds after fully twisting it 2-3 times.

Except for paying attention to the depth of the swab. We should also note that there is always the habit of having the patient lift their head completely, bend the swab, and take a sample. This is wrong.

In fact, the above approach is wrong. This operation will cause the swab head to stay in an incorrect position. And the final sample obtained is not a standard nasopharyngeal swab specimen.

 

Covid Mouth Swab Test

Covid Mouth Swab Test

Covid Mouth Swab Test

Three key points for oral swab collection!

The oral swab is an all-in-one system that can collect, stabilize, transport and purify DNA from saliva in advance, providing a painless and risk-free new way to collect microbial DNA for disease control and prevention.

Accidentally, it is easy to cause people to be infected with the new coronavirus, and the surface detection is not sensitive, and the operation is easy to lead to standardized operation.

Awareness Check Tool:

Testing equipment for testing equipment, including testing tools for testing equipment, testing equipment for testing equipment, testing equipment for testing equipment, including safety testing equipment.

Virus Sampling Tube & Nasopharyngeal Swab (Inactivated)

Virus Sampling Tube & Nasopharyngeal Swab (Inactivated)

Oropharyngeal sampling points:

1. Sufficient light: Good lighting should be provided for both indoor and outdoor light sources. If necessary, flashlight lighting should also be provided.

2. Full exposure: The three anatomical locations for oropharyngeal swab collection must be completely exposed, and a spatula should be used when exposing bilateral tonsils.

3. Accurate location: The oropharyngeal swab should not touch other parts, such as the tongue, chin, etc., except for the three designated locations, so as not to be stained with saliva and affect the quality of specimen collection.

Covid Mouth Swab Test Pre-harvest preparation

Routine screening:

Work clothes, medical protective face shield, work cap, gloves, isolation gown, goggles (anti-fog) or face shield.

Influenza or suspected cases:

Wear work clothes, medical protective masks, work caps, gloves, isolation gowns or protective clothing, goggles (anti-fog) or protective face shields, and add shoe covers or boot covers if necessary.

Order of protective clothing:

Work caps that do not need to be worn. → Protective masks (Wearable head-mounted type and a tightness test should be performed after wearing them.)→ No shoes protective clothing (Boot covers should be added instead of foot protective clothing.) → Surgical gloves. → Protective screen or goggles.

Employee Registration Protection:

Tooling or isolation gown. → Medical-surgical mask or medical protective face shield. → Disposable work cap.

Protective clothing should be replaced every 4 hours and should be replaced in time if there is moisture or pollution.

Supplies preparation: Throat swab sampling sleeve, tongue depressor, inspection sheet and barcode, transport bag or refrigerator, 75% alcohol, pen.

Nucleic acid collection

1. We asked the examinee to tilt his head slightly, open his mouth.

And lift the upper jaw vertically to expose the posterior pharyngeal wall.

2. Use the front end of a sterile long cotton swab to quickly rub up and down 3-5 times on the bilateral pharyngeal tonsils.

And 3-5 times on the upper and lower sides of the posterior pharyngeal wall.

3. After scraping, open the sampling tube. Insert the front end of the sample vertically into the sampling tube. Insert the sampling tube. Break the sampling tube to expose the outer part of the tube. And tighten the cap.

Place the sampling tube in a biosafety sealed bag, mark the name and other information on the sampling tube, and complete the sampling.

Notice:

1. When sampling with the Covid Mouth Swab Test, it is best not to call “ah”, because once the sampled person is a positive patient, he will shout “ah”, exhale the virus in large quantities, and form aerosols in the sampling area.

When sampling, we advise patients to open their mouths and not yell or take deep breaths.

2. During the sampling process, one person collects and one person disinfects.

When the sampler holds the cotton swab, try to take it as far as possible.

3. A large number of samplers collect oropharyngeal swabs face-to-face with the sampled person.

Therefore, during the sampling process, the breath exhaled by the patient can easily and directly pose a great threat to the medical staff.

To reduce the risk of the sampler, we recommend that healthcare workers sample at a 45-60 degree angle to reduce risk.

End of Swab Test sampling

1. Spray and disinfect the generated medical waste layer by layer, and tie the gooseneck double medicine bag tightly to ensure that the seal is tight, has no damage, and has no leakage. Do not squeeze the contents of the medical waste bag. Annotation generates point information.

2. The order of unprotected items: hand hygiene → take off the protective face shield or goggles → hand hygiene → take off the protective clothing (take off the boot cover together) → hand hygiene, take off gloves, hand hygiene → take off the protective mask and Disposable work cap → hand hygiene.

Oropharyngeal Throat Swab Manufacturers

Oropharyngeal Throat Swab Manufacturers

Oral Swab Stick

Oropharyngeal Throat Swab Manufacturers

Name: Oropharyngeal swabs individually packaged

Contents: Oropharyngeal swab 150mm*1

Material: Cotton Swabs: Nylon Flocking Fiber

Swab stem: Medical grade plastic ABS handle

Availability: Can be paired with UTM/VTM

MOQ: 10,000 pieces

 

 

 

Product manual:

To ensure that the cotton swabs collect more samples, we replaced regular cotton swabs with the nylon flocking technology.

The ABS material used has a great effect on resistance.

Such materials have high-temperature resistance, high tensile strength, wear-resistance and low cost.

Oropharyngeal flocked swab size

Oropharyngeal flocked swab size

There is an obvious breakpoint about 3 cm in the front, which is convenient to be placed in the preservation solution for storage and transportation.

Description of Oropharyngeal Swab:

Wash your mouth before use and stop eating within half an hour.

Gently rotate 3-5 times in the oral cavity.

Throat swabs were removed from 3 cm.

Place a cotton swab into a test tube with Universal Delivery Medium.

Precautions:

Try it for one person only.
Do not open the package at will, so as not to pollute the environment.
To prevent cross-infection, use the swab carefully.

Flocked swab evaluation

Flocked Swab Evaluation: Virus Sampling Swab Material and Performance

Flocked Swab Evaluation: Virus Sampling Swab Material and Performance

Flocked swabs are the main test samples for PCR.

In the selection of raw materials, flocking glue plays a key role in the collection and release efficiency of swabs.

Whether to use high-quality water-based flocking glue is the main factor affecting the water absorption and hydrophilicity of fluff.

The experiment is to compare the sample collection effects of swabs flocked with different glues.

Preparation materials: Flocked swab, control group flocking swab, beaker, dye, water, balance, scale, vernier calliper.

1. The purpose of the experiment

The quality of incoming nasal swabs is guaranteed through the appearance inspection, size inspection and saturated liquid absorption inspection of the anterior nasal swab.

Flocked nasal swab

Flocked nasal swab

2 Sampling guidelines for flocked swab samples

2.1 Appearance inspection, the quality department conducts sampling according to scientific methods.

The quality personnel shall check whether the swab packaging bag is complete.

2.2 Visual inspection

1. Visually inspect the appearance of the swab to see that there is no lack of glue, no cracks, no deformation, no black spots and heterochromatic spots; (CR)

2. Visual inspection of the head: no damage, false soldering, missing soldering, black spots, looseness, dirt, scorch.

Visual inspection of the material: Compared with the swab sample, whether there is a difference in the material and thickness of the cotton tip of the swab.

2.3 Size check

The inspector carries out dimensional inspection according to the specifications of the material coding system.

2.4 Saturated suction volume

The inspector weighed the flocking cotton swab and recorded it as ml. Transfer it to a qualified preservation solution bottle 15 times. Weigh the swab again and record it as m2 and 0.11g ≤ m2-m1 ≤ 0.18g.

Remarks:

1. Definition of defect level: (MA) is a general defect mark; (MI) is a minor defect mark; (CR) is a serious defect mark.

Nasopharyngeal Swab Sample

Nasopharyngeal Swab Sample

Nasopharyngeal Swab Sample (Nasal Swab)

The nasopharyngeal swab: A specimen collection tool used to collect cell samples from the nasopharynx (above the throat).

When a patient develops an upper respiratory tract infection, doctors can use the collected samples to detect it, especially when the patient still has a fever.

In the experiment, technicians can detect common sources of infection, including potential pathogens such as the new crown and swine flu.

How is the COVID-19 nasal swab test performed?

how to collect swab sample

how to collect swab sample

Such tests can be uncomfortable for patients, but can quickly identify serious respiratory illnesses, especially those that require isolation or infection prevention measures to protect other patients.

Doctors can use cell cultures to determine the type of current infection. Factory-produced nasopharyngeal swabs cannot use natural substances such as cotton, as they may contain some impurities that will affect the detection.

Nasopharyngeal Swab materials

The nasopharyngeal swabs produced and sold by Cell Medical Company are flocked materials. Learn more about flocked swabs.

flocked swab

flocked swab

CellMedical flocked swabs are famous for their stable and reliable performance and excellent absorption and elution ability.

In general, a caregiver can place a sealed package (safety bag) next to the patient, and the caregiver places a sample container next to the patient, which contains a culture medium that maintains cellular and microbial viability for evaluation. This is the viral transport medium.

Laboratory technicians can detect the source of infection through nasopharyngeal swabs, and they should wear gloves and masks when collecting nasopharyngeal swabs.

Face protection is an effective measure to prevent patients from contracting respiratory diseases.

Nasopharyngeal swab collection

When taking the sample, gently insert the swab into the nose by hand, pushing it all the way to the nasopharynx. Patients often experience discomfort, convulsions, or spasms; for this, they sometimes need to suppress this response by leaning their heads against a wall or pillow.

When the nasopharyngeal swab is fully in, the caregiver can briefly swirl to collect the cell mixture, remove it, and place it in the specimen collection container. (Virus sampling tube)

After the sampler obtains the sample, he should immediately send it to the laboratory for PCR testing.

Waiting or not storing at low temperature may kill microorganisms that may be present in the sample, resulting in false-negative test results.

Patients usually get results within a day or two.

Inspection is capable of scanning for many common microorganisms.

When infectious diseases appear in epidemic areas, nasopharyngeal swabs and other microorganisms can be labelled to detect new crowns, swine flu and other microorganisms.

The doctor can try the test results to guide the patient’s treatment.

They can also help epidemiologists track the movement of diseases in the community, which is very useful for controlling disease outbreaks.