Podcast
Questions and Answers
What does the bleeding time test primarily assess?
What does the bleeding time test primarily assess?
- The levels of clotting factors II, VII, IX, and X.
- The intrinsic and extrinsic coagulation pathways.
- The functionality of the fibrinolytic system.
- Platelet number, function, and vessel wall integrity. (correct)
In the Modified Duke Method for bleeding time, what is the typical site of puncture?
In the Modified Duke Method for bleeding time, what is the typical site of puncture?
- 15-20mm rounded fatty portion of the earlobe (correct)
- The ball of the foot.
- Dorsal side of the hand.
- Volar surface of the forearm.
What is the normal value (NV) for bleeding time when using the Modified Duke Method?
What is the normal value (NV) for bleeding time when using the Modified Duke Method?
- NV: >10 minutes
- NV: 2-5 minutes
- NV: 10-15 minutes
- NV: <8 minutes (correct)
During the Ivy Method for bleeding time assessment, what pressure is maintained using a blood pressure cuff?
During the Ivy Method for bleeding time assessment, what pressure is maintained using a blood pressure cuff?
If a patient has a normal platelet count but a prolonged bleeding time, which condition is most likely?
If a patient has a normal platelet count but a prolonged bleeding time, which condition is most likely?
The capillary resistance test (fragility test) is designed to detect:
The capillary resistance test (fragility test) is designed to detect:
In the Positive Pressure Test (Rumpel-Leede/Tourniquet Test), at what pressure is the blood pressure cuff typically set?
In the Positive Pressure Test (Rumpel-Leede/Tourniquet Test), at what pressure is the blood pressure cuff typically set?
What observation indicates a positive result in the Rumpel-Leede test?
What observation indicates a positive result in the Rumpel-Leede test?
In the Negative Pressure Test, what pressure is applied using a suction cup?
In the Negative Pressure Test, what pressure is applied using a suction cup?
What does clot retraction time primarily evaluate?
What does clot retraction time primarily evaluate?
What is a normal range for clot retraction, expressed as a percentage of serum volume released?
What is a normal range for clot retraction, expressed as a percentage of serum volume released?
Abnormal clot retraction can be associated with:
Abnormal clot retraction can be associated with:
What is the normal range for platelet count?
What is the normal range for platelet count?
Which of the following is a component of the Rees-Ecker diluting fluid used in the Tonkantin method for manual platelet counts?
Which of the following is a component of the Rees-Ecker diluting fluid used in the Tonkantin method for manual platelet counts?
Which method is considered the reference method for manual platelet counts?
Which method is considered the reference method for manual platelet counts?
According to platelet estimation on peripheral blood smear, what does a reported range of 100,000-149,000/uL indicate?
According to platelet estimation on peripheral blood smear, what does a reported range of 100,000-149,000/uL indicate?
At what platelet level is spontaneous bleeding possible?
At what platelet level is spontaneous bleeding possible?
Why does a sample become clearer during platelet aggregation?
Why does a sample become clearer during platelet aggregation?
Which aggregating agent typically shows a normal response in patients with Glanzmann thrombasthenia?
Which aggregating agent typically shows a normal response in patients with Glanzmann thrombasthenia?
In the Glass Bead Retention Test, what does the procedure assess?
In the Glass Bead Retention Test, what does the procedure assess?
Flashcards
Bleeding Time
Bleeding Time
The actual time it takes for a standard wound to stop bleeding
Modified Duke Method
Modified Duke Method
A method to measure bleeding time where a 15-20mm cut is made on the earlobe using a sterile blade, and blood is absorbed until bleeding stops. Normal value is less than 8 minutes.
Ivy Method
Ivy Method
A method to measure bleeding time involving puncturing the volar surface of the forearm twice under 40 mmHg pressure, collecting blood with filter paper every 30 seconds after 2 minutes.
Capillary Resistance Test
Capillary Resistance Test
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Positive Pressure Test
Positive Pressure Test
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Negative Pressure Test
Negative Pressure Test
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Clot Retraction Time
Clot Retraction Time
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Tonkantin Method
Tonkantin Method
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Brecher-Cronkite Method
Brecher-Cronkite Method
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Unopette Method
Unopette Method
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Normal Platelet Count
Normal Platelet Count
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Platelet Aggregation
Platelet Aggregation
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Glass Bead Retention Test
Glass Bead Retention Test
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Study Notes
- Lab assessment of primary hemostasis is discussed.
Bleeding Time
- Actual time it takes for a standard wound to stop bleeding.
- Detects abnormalities of platelet number and function, Factor VIII: VWF deficiency, and vessel wall structure.
Methods
- Modified Duke Method involves using a 15-20mm rounded fatty portion of the earlobe.
- A No. 11 sterile Bard-Parker Surgical Blade is used, with the blade passing through the ear and hitting a glass slide with a clicking sound.
- Normal value (NV) is less than 8 minutes.
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