Platelet Count Quiz

Capillary action.

By squeezing the reservoir to apply negative pressure.

Platelet count = # of Cells x 10 x 200/4.

<p>150,000 – 400,000.</p> Signup and view all the answers

<p>To prevent air from entering which could interfere with accurate measurement.</p> Signup and view all the answers

<p>Elevated MPV suggests larger platelets, which may indicate active bone marrow regeneration.</p> Signup and view all the answers

<p>Accurate platelet counting is crucial for diagnosing and managing thrombocytopenia effectively.</p> Signup and view all the answers

<p>A hemocytometer is primarily used for accurate estimation of cell concentration in blood samples.</p> Signup and view all the answers

<p>Platelet overactivation is linked to conditions such as deep vein thrombosis and heart attacks.</p> Signup and view all the answers

<p>A hemocytometer is used to quantify microbial populations in cultures like bacteria, yeast, or fungi.</p> Signup and view all the answers

<p>Understanding platelet disorders is vital as they contribute to various hematologic and vascular diseases.</p> Signup and view all the answers

<p>An automated analyzer provides more accurate platelet counts and generates MPV measurements.</p> Signup and view all the answers

<p>Mismanagement in thrombocytosis can lead to complications such as strokes and peripheral artery disease.</p> Signup and view all the answers

<p>Manual platelet counting is cheaper, uses a standard dilution factor for reproducibility, and minimizes sample handling errors.</p> Signup and view all the answers

<p>Accuracy relies heavily on the operator's skill and experience, as improper loading or uneven mixing can yield inaccurate counts.</p> Signup and view all the answers

<p>Manual platelet counting can verify automated platelet counts in diagnosing thrombocytopenia or thrombocytosis.</p> Signup and view all the answers

<p>Hypogranular platelets, which contain less than 20 granules, may indicate myelodysplastic syndromes and other disorders.</p> Signup and view all the answers

<p>It allows for detailed evaluation of platelet function and morphology, fundamental in hematology research.</p> Signup and view all the answers

<p>It ensures precise volume measurements.</p> Signup and view all the answers

<p>The central square is divided into 25 medium squares, which are further subdivided into 16 smaller squares for a total of 400 squares.</p> Signup and view all the answers

<p>Dilution ensures that the cell concentration falls within the measurable range.</p> Signup and view all the answers

<p>The coverslip is designed to fit precisely, maintaining a fixed distance and aiding accurate volume measurement.</p> Signup and view all the answers

<p>Only count cells touching specific borders of the chosen squares.</p> Signup and view all the answers

<p>The central square is used for counting red blood cells, while the four corner squares are used for counting larger cells like white blood cells.</p> Signup and view all the answers

<p>Thorough mixing ensures even distribution of the cells within the sample.</p> Signup and view all the answers

<p>Each medium square measures 1 mm x 1 mm.</p> Signup and view all the answers

<p>It ensures adequate mixing for accurate platelet counting.</p> Signup and view all the answers

<p>Bone marrow failure and immune thrombocytopenic purpura (ITP).</p> Signup and view all the answers

<p>Platelet count = # of Cells x 1 x 10 x 100.</p> Signup and view all the answers

<p>It may indicate macrothrombocytes or a rare bleeding disorder.</p> Signup and view all the answers

<p>Increased risk of clot formation leading to heart attacks or strokes.</p> Signup and view all the answers

<p>To ensure complete interaction between the blood sample and the diluent.</p> Signup and view all the answers

<p>Discard several drops (3-4) and place the hemocytometer in a moist petri dish for 10 minutes.</p> Signup and view all the answers

<p>These symptoms can indicate thrombocytopenia or platelet dysfunction.</p> Signup and view all the answers

<p>It allows observation of platelet morphology alongside counting and provides accurate results when automated methods are unavailable.</p> Signup and view all the answers

<p>Subject to human error and requires meticulous sample preparation.</p> Signup and view all the answers

<p>It is used for diluting the blood sample to facilitate counting under a microscope.</p> Signup and view all the answers

<p>The hemocytometer serves as a counting chamber where the diluted blood sample is analyzed under a microscope.</p> Signup and view all the answers

<p>Capillary pipette, diluent reservoir, protective sleeve, and mixing device.</p> Signup and view all the answers

<p>Platelet numbers are extremely low, making it challenging to obtain a reliable count.</p> Signup and view all the answers

<p>Place it over the moistened filter paper inside the petri dish and allow it to stand for 5 minutes.</p> Signup and view all the answers

<p>Wiping prevents contamination and ensures an accurate volume of blood is used for dilution.</p> Signup and view all the answers

<p>It ensures thorough mixing of the blood with the diluent, which is critical for accurate results.</p> Signup and view all the answers

<p>Platelet clumps or debris can obstruct visibility and lead to erroneous results.</p> Signup and view all the answers