Hemostasis Screening

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Block C2 - Safe Motherhood & Neonates


Clinical Pathology
Office:5th floor, Radiopoetro
Lab:6th floor, Radiopoetro
Work-plan:Yes.
Pre-test:10 questions, mixed.
Post-test:None.
Lab Report:Yes, include work-plan.


Coagulation in various conditions.

Type of Blood Tests[edit]

  • Torniquet Test (Capillary Fragility Test)
  • Bleeding Time (Ivy Method)
  • Platelet Count (Direct Method; Rees-Ecker)
  • PT (Prothrombin Time)
  • APTT (Activated Partial Thromboplastin Time)

Pre-test Questions[edit]

HSC 2011 Batch[edit]

  1. Prothrombin Time is used to measure: Factor X. (Also Factors II, V, and VII).
  2. The function of sodium citrate: calcium binding.
  3. Normal platelet count: 150,000-400,000/ml.
  4. Petechiae considered positive if: more than 20.
  5. Instrument that cannot gauge bleeding time: stethoscope.
  6. Conditions that can cause positive petechiae: Thrombocytopenia, fibrinogen deficiency, vascular purpura.
  7. Which is not a function of torniquete exam: to check for anemia.
  8. Rumple Leede test is used to check for: Dengue fever.
  9. Platelets are seen from: 20 Field of View.
  10. Centrifuge speed: 3000 rpm.
  11. Normal time to bleeding time is: 1-6 minutes.

Batch 2011 International Program[edit]

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  1. Mention 3 substances which constitute Ress-Ecker solution: Sodium citrate, brilliant cresyl blue, formaldehyde 40%
  2. Torniquet test (+)1 and (+)4 can be interpreted as:
    1. +(1): A few petechiae on the anterior forearm.
    2. +(4): Confluent (over-lapping) petechiae on the arm and back of the hand.
  3. The following equipment is required for aPTT test, except: microscope.
  4. A doctor is about to perform torniquet test on a 22 year old patient with BP 140/80. Which one of the following is the appropriate cuff pressure to be applied to the patient in order to get reliable test result: 100 mmHg.
  5. What is the cut-off point for sum of petechiae per inch squared to interpret torniquet test results as positive: 20.
  6. Platelet count in thin blood smear is done by counting the sum of platelet in 20 immersion view.
  7. Which one of these coagulation factor's level affect both PT and aPTT test result: Factor X.
  8. Tissue Factor is required in intrinsic pathway of coagulation cascade. False.
  9. Normal PT result and abnormal aPTT result is found in patients with severe hypocalcemia. T/F.
  10. If the sum of platelet in 2 large squares is 300 platelets, then the sample's platelet level is normal. T/F.

Lab Report[edit]

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Group 5 from the 2011 batch (and possibly other groups) were asked to write about Idiopathic Thrombocytopenic Purpura in the Clinical Correlation section of their lab report.

External Links[edit]