Les étudiants en analyses médicales

11/11/2025

04/11/2025

04/11/2025

💩 هل تعلم أن كلمة (DIARRHEA) نفسها تساعد الأطباء على تذكّر أسباب الإسهال؟ 😯

شاهد كيف كل حرف فيها يرمز لسبب مختلف 👇

🔹 D → الأدوية مثل الملينات، والمضادات الحيوية، والديجوكسين
🔹 I → متلازمة القولون العصبي، أو التهابات الأمعاء (فيروسية أو بكتيرية)
🔹 A → أمراض مناعية مثل التهاب القولون التقرّحي أو الزائدة الدودية
🔹 R → تسارع حركة الأمعاء أو متلازمة التفريغ السريع
🔹 R → فشل كلوي
🔹 H → زيادة إفراز الأحماض (متلازمة زولينجر إليسون)
🔹 E → اضطرابات الغدد مثل فرط نشاط الغدة الدرقية أو السكري
🔹 A → مشاكل في الامتصاص مثل ضعف البنكرياس
🔹 L → الأورام أو الآفات

🧠 باختصار: كلمة DIARRHEAL مش بس تعني "إسهال"، بل تذكّرك بأهم الأسباب وراءه!

14/02/2025

Haemophilus influenzae is isolated on chocolate agar because this medium provides the essential growth factors required for its survival:
1. X factor (Hemin): Required for the synthesis of cytochromes and other heme-containing enzymes.
2. V factor (NAD – Nicotinamide Adenine Dinucleotide): Essential for bacterial metabolism and growth.

Chocolate agar is prepared by heating blood agar, which lyses red blood cells, releasing both X and V factors into the medium. This makes it ideal for the growth of fastidious organisms like H. influenzae, which do not grow well on regular blood agar due to the presence of intact red blood cells that restrict the availability of these factors.

Additionally, chocolate agar helps suppress the growth of other bacteria, making it easier to isolate and identify H. influenzae in clinical samples like sputum, cerebrospinal fluid, and throat swabs.

11/11/2024

A D-R (Direct Renin) lab test measures the level of renin, an enzyme released by the kidneys, in your blood. This test helps evaluate issues related to blood pressure, electrolyte balance, and certain kidney disorders.

Renin works closely with aldosterone, a hormone that regulates sodium and potassium levels. Doctors may order this test to help diagnose conditions such as hypertension, primary aldosteronism, or other endocrine disorders.

For accurate results, patients may be asked to fast, adjust their posture, or avoid certain medications before the test. Results are typically interpreted alongside aldosterone levels for a more complete assessment of hormonal and renal health.

The specimen for a Direct Renin (D-R) lab test is typically a blood sample.

1. Sample Type: Blood is drawn from a vein, usually from the arm.
2. Tube Type: The blood is collected in a special tube, often one with EDTA (an anticoagulant), to preserve the sample and prevent clotting.
3. Handling: After collection, the sample may need to be chilled immediately and processed quickly, as renin levels can degrade if not handled correctly.
4. Transport: Some facilities require the sample to be kept on ice until it is processed to maintain accuracy.

This sample will then be analyzed in a laboratory to measure the renin concentration.