คำแนะนำในการเก็บน้ำลายแบบแยกส่วน: วิธีรวบรวมและเก็บรักษาตัวอย่าง

Saliva collection has become one of the most popular methods for obtaining DNA samples for genetic testing, molecular diagnostics, research studies, and biobanking. เทียบกับการเจาะเลือด, saliva sampling is non-invasive, ไม่เจ็บปวด, and suitable for self-collection.

Among the various saliva collection solutions available, split-design saliva collectors offer a convenient and reliable way to collect, preserve, and transport saliva specimens. By separating the collection tube and preservation solution before use, these devices help maintain reagent stability while ensuring easy activation during sample collection.

This guide explains how a split saliva collector works, how to collect a high-quality saliva sample, and how to store the specimen properly for optimal DNA preservation.

What Is a Split Saliva Collector?

A split saliva collector is a saliva collection device designed with separate compartments for saliva collection and preservation solution storage.

โดยทั่วไป, the device consists of:

• A saliva collection funnel
• A collection tube
• A preservation solution tube
• A secure sealing cap

Preparation Before Saliva Collection

Proper preparation is essential for obtaining a high-quality DNA sample.

Avoid the Following for 30 Minutes Before Collection

To reduce contamination and improve sample quality:

• Do not eat food.
• Do not drink beverages.
• Do not smoke.
• Do not chew gum.
• Avoid placing anything in your mouth.

These precautions help ensure that the collected saliva contains sufficient intact cells for DNA extraction.

Step-by-Step Saliva Collection Procedure

ขั้นตอน 1: Open and Inspect the Saliva Collection Kit

Remove the saliva collector from its packaging.

ก่อนใช้งาน, inspect the device carefully and ensure that:

• The packaging is intact.
• The collection tube is undamaged.
• The preservation solution tube is sealed properly.

Do not use the kit if any component appears damaged or contaminated.

ขั้นตอน 2: Rinse Your Mouth

Rinse your mouth thoroughly with clean water to remove food particles and debris.

หลังจากล้างออก, wait approximately 30 minutes before collecting the sample.

This waiting period helps prevent dilution or contamination of the specimen.

ขั้นตอน 3: Increase the Number of Oral Cells

To improve DNA yield:

• Rub the roof of your mouth with your tongue.
• Rub the lower palate with your tongue.
• Gently scrape your tongue against your teeth.

This process helps release exfoliated epithelial cells into the saliva, increasing the amount of DNA available for testing.

ขั้นตอน 4: Collect the Saliva Sample

Spit saliva into the collection funnel slowly and naturally.

Continue until the liquid saliva level reaches the 2 mL fill line.

สำคัญ:
Only the liquid saliva should be measured. Bubbles and foam should not be counted as part of the required sample volume.

ขั้นตอน 5: Add the Preservation Solution

Hold the collector upright.

Carefully unscrew the cap of the preservation solution tube and slowly pour the solution into the collection funnel.

ขั้นตอน 6: Remove the Funnel

Keeping the collection tube upright, carefully remove the collection funnel by unscrewing it from the tube.

Avoid spilling any sample during this process.

ขั้นตอน 7: Seal and Mix the Sample

Securely tighten the cap on the collection tube.

Gently invert the tube 5–6 times to ensure complete mixing of:

• ตัวอย่างน้ำลาย
• DNA preservation solution

Once mixed, the sample is ready for storage and transportation.

Saliva Sample Storage Requirements

After collection and mixing, proper storage is essential.

การจัดเก็บอุณหภูมิห้อง

The stabilized saliva sample can be stored at room temperature for up to:

15 วัน

This provides flexibility for sample transportation and laboratory submission.

Refrigerated Storage

For extended storage, keep samples refrigerated at:

2–8°ซ (35.6–46.4°F)

Under these conditions, DNA stability can be maintained for up to:

3 เดือน

เพื่อผลลัพธ์ที่ดีที่สุด, samples should be shipped to the testing laboratory as soon as possible after collection.

Common Mistakes to Avoid

To ensure accurate DNA testing results, avoid the following errors:

• Eating or drinking before collection
• Collecting insufficient saliva volume
• Counting bubbles as saliva
• Forgetting to add the preservation solution
• Inadequately mixing the sample
• Leaving the tube loosely capped
• Exposing the sample to excessive heat
• Delaying shipment beyond recommended storage periods

Why Choose MEIDIKE GENE Split Saliva Collectors?

MEIDIKE GENE offers professionally designed split saliva collection devices for DNA preservation and molecular testing applications.

ชุดเก็บตัวอย่างน้ำลายแบบใช้แล้วทิ้งสำหรับการเก็บตัวอย่าง DNA/RNA ด้วยตนเอง

คุณสมบัติที่สำคัญ

• Split design with separate preservation solution chamber
• Easy self-collection procedure
• Non-invasive and painless sampling
• Reliable DNA stabilization
• Leak-resistant collection tube
• Suitable for transportation and storage
• Available for OEM and ODM customization
• เหมาะสำหรับคลินิก, ห้องปฏิบัติการ, และแอพพลิเคชั่นการวิจัย

The split-design system helps ensure sample integrity while providing a simple and user-friendly collection experience.