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Stool for Ocult Blood Test

1 min read

INTRODUCTION

The occult blood stool test is used to detect the presence of microscopic or trace amounts of blood in stool that may not be visible to naked eye. It serves as a screening tool for gastrointestinal issues like ulcers, polyps or colorectal cancers.

Test Catageory
فئة التحليل

Routine

Refrence Books
كتب مراجع

1. Monica for Medical Laboratory

Skills Required
المهارات المطلوبة

1. Microscopy
2. Interpretation skills

Video Resources
مصادر فيديو

Resource 1
عربي

Principle

The guaiac paper used in the test contains a pigment that will turn blue in the presence of heme component of hemoglobin from red blood cells. Hydrogen peroxide in the developer catalyzes this reaction, indicating occult blood.

Equipments

Stool specimen collection container
Occult blood test kit containing developer solution
Applicator sticks
Test cards with guaiac paper
Gloves

Sample Type

Stool Sample

Procedure

1. Collect very small stool sample using the applicator stick.
2. Smear sample as a very thin film on guaiac paper of test card.
3. A pply 1-2 drops developer solution next to sample on card.
4. Observe over 1 minute for any blue coloration to develop.
5. A positive test shows blue patch indicating blood.
6. Results are reported qualitatively as positive or negative.

Results

Positive occult blood signified gastrointestinal bleeding which requires further diagnostic testing like endoscopy. Causes include hemorrhoids, gastritis, cancers or ulcers in the GI tract.

Notes: 

Follow exact procedure to prevent false positive and negatives
Certain foods, medicines can impact results
Collect stool after 72 hours of dietary restrictions
Repeat testing may be needed for confirmation

اتبع الإجراء الدقيق لمنع الإيجابية والسلبيات الكاذبة
بعض الأطعمة والأدوية يمكن أن تؤثر على النتائج
اجمع البراز بعد 72 ساعة من القيود الغذائية
قد تكون هناك حاجة لتكرار الاختبار للتأكيد

Quick Notice

M. Sulieman

mohammad@mlsgaate.com

اتبع الإجراء الدقيق لمنع الإيجابية والسلبيات الكاذبة
بعض الأطعمة والأدوية يمكن أن تؤثر على النتائج
اجمع البراز بعد 72 ساعة من القيود الغذائية
قد تكون هناك حاجة لتكرار الاختبار للتأكيد

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