Diluting Blood for White Cell Count Quiz

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What is the main cause of crenated cells?

Moisture in the air
Too cold temperature (correct)
Increased levels of lipids
Uneven pressure

What is the purpose of the spinner method?

To introduce moisture into the blood sample
To create crenated cells
To increase lipid levels in the blood sample
To spread blood evenly on a slide (correct)

What is the Beacom technique also known as?

Two-Cover Slip method (correct)
Ehrlich method
Spinner method
Hemaspinner technique

What should be avoided when making a coverslip smear using the Ehrlich method?

Squeezing the cover glasses together (D) Signup and view all the answers

What happens if a drop of blood is not allowed to spread across the width of the spreader slide?

Water artifact occurs (A) Signup and view all the answers

What is the primary issue caused by hesitation or interruption during slide preparation?

Water artifact occurrence (D) Signup and view all the answers

Why should blood not be allowed to completely spread before separating cover glasses in a coverslip smear?

To form a specific figure (C) Signup and view all the answers

What is the purpose of air-drying the cover glass after making a smear?

To avoid water artifact issues (C) Signup and view all the answers

What does the Hemaspinner instrument achieve in slide preparation?

Spins 3-4 drops of blood evenly on a slide (C) Signup and view all the answers

What is the primary purpose of the erythrocyte sedimentation rate (ESR) test?

To measure the rate at which red blood cells aggregate and settle out of the plasma (C) Signup and view all the answers

Which of the following statements about the ESR test is NOT true?

It is a specific test for detecting active infections like tuberculosis or rheumatic fever (B) Signup and view all the answers

What is the primary advantage of the Wintrobe-Landsberg method for measuring ESR?

It uses a specially calibrated Wintrobe tube, which improves accuracy (B) Signup and view all the answers

According to the provided information, which of the following steps is NOT part of the Wintrobe-Landsberg method for measuring ESR?

Centrifuge the blood sample before transferring it to the Wintrobe tube (C) Signup and view all the answers

What is the principle behind the erythrocyte sedimentation rate (ESR) test?

It quantifies the rate at which red blood cells sediment and form a packed column in the tube (D) Signup and view all the answers

Which of the following factors does NOT influence the erythrocyte sedimentation rate (ESR)?

The hematocrit (red blood cell count) of the sample (A) Signup and view all the answers

Which of the following statements about the erythrocyte sedimentation rate (ESR) test is true?

It is a non-specific test that can be influenced by various factors (B) Signup and view all the answers

What is the purpose of using an anticoagulant in the blood sample for the erythrocyte sedimentation rate (ESR) test?

To facilitate the sedimentation of red blood cells and formation of a packed column (A) Signup and view all the answers

According to the provided information, what is the approximate time required for the red blood cells to sediment and form a packed column in the Wintrobe-Landsberg method?

1 hour (B) Signup and view all the answers

Which of the following statements about the Wintrobe-Landsberg method for measuring ESR is true?

Its advantages outweigh its few drawbacks, making it a commonly used method (A) Signup and view all the answers