TEST FOR PRIMARY HEMOSTASIS

Question 1

term used to describe the
mechanism of certain systems that keeps blood in the circulation and produces of clot in cases of blood vessel injury

Answer 1

HEMOSTASIS

Question 2

The systems composing the process of hemostasis are the:

Answer 2

Blood vessels
Platelets
Coagulation factors
Fibrinolysis components

Question 3

General Considerations in preventing premature activation activation

Answer 3

Contamination with Tissue
thromboplastin
Inappropriate container
Improper Temperature
Hemolysis

Question 4

EQUIPMENT AND ANTICOAGULANT

Answer 4

Needle Size
Evacuated Tubes/Syringes

Question 5

NEEDLE SIZE:
_______most commonly
used for coagulation samples
_______collection of more
than 20 mL of blood
_______narrow or small
veins

Answer 5

20-gauge needle
19-gauge needle
21-gauge needles

Question 6

Syringes and evacuated tubes should be______

Answer 6

SILICONE COATED.

Question 7

ANTICOAGULANTS:

Answer 7

POTASSIUM CHLORIDE
TRISODIUM CITRATE
EDTA
HEPARIN

Question 8

preferred anticoagulant
good in preserving the
labile factors______ and _____

Answer 8

TRI-SODIUM CITRATE.
Factor V and VIII

Question 9

blood-to-anticoagulant ratio
for citrate

Answer 9

9:1

Question 10

BLOOD COLLECTION:
1. _______is acceptable if tissue juice contamination must
be avoided
2. In anticipation of difficulties while doing venipuncture or if blood is being drawn for special procedures, using a ______ is recommended

Answer 10

1. VACUUM TUBE METHOD
2. TWO-SYRINGE METHOD

Question 11

TEST FOR PRIMARY HEMOSTASIS

Answer 11

Bleeding time
Capillary resistance Test
Clotting Retraction Time
Platelet Count
Platelet Aggregation
Platelet Adhesiveness

Question 12

actual time it takes for a standard wound to stop bleeding

Answer 12

BLEEDING TIME

Question 13

BLEEDING TIME DETECTS:

Answer 13

Abnormalities of platelet number and function
Von Willebrand Factor deficiency
Abnormalities of vessel wall structure

Question 14

BLEEDING TIME METHODS

Answer 14

MODIFIED DUKE METHOD
IVY METHOD

Question 16

Detects abnormality of the capillaries due to a structural weakness in the capillary walls or thrombocytopenia

Answer 16

CAPILLARY RESISTANCE TEST

Question 17

CAPILLARY RESISTANCE TEST METHODS:

Answer 17

POSITIVE PRESSURE TEST
NEGATIVE PRESSURE TEST

Question 18

5 mL of whole blood is incubated at 37 deg Celsius for 1 hr

Clot will begin to shrink and retract from the walls of the tube

Answer 18

CLOT RETRACTION TIME/ MCFARLANE CLOT RETRACTION TECHNIQUE

Question 19

NORMAL VALUE FOR CLOT RETRACTION TIME

Answer 19

44-67%

Question 20

FORMULA FOR CLOT RETRACTION TIME

Answer 20

%CRT = VOL SERUM/TOTAL VOLUME OF WHOLE BLOOD X 100

Question 21

FACTORS OF CLOT RETRACTION TIME

Answer 21

1.NUMBER OF CONTRACTIBLE PLTS
2.PRESENCE OF Ca and ATP
3.normal concentration of fibrinogen

Question 22

PLT count methods

Answer 22

DIRECT & PLT ESTIMATION OF PBS

Question 23

Direct methods for plt count

Answer 23

TONKANTIN METHODS
BRECKER-CRONKITE METHOD
UNOPETTE METHOD

Question 24

Aggregation agents are added to PRP to induce shape change and aggregation of platelets

Answer 24

PLATELET AGGREGATION

Question 25

PLATELET AGGREGATION:
AGGREGATION AGENTS?

Answer 25

Epinephrine
Collagen
ADP
Ristocetin

Question 26

When blood is passed through a glass bead column, normal platelets that have VWF will adhere and aggregate to the beads

Answer 26

GLASS BEAD TEST

Question 27

FORMULA FOR PLT ADHESIVENESS

Answer 27

PA=(PC1-PC2/PC1)X 100%

Question 28

NORMAL VALUE FOR PLT ADHESIVENESS

Answer 28

70% or greater

Question 29

REFERENCE METHOD for
manual COUNT FOR PLT

Answer 29

BRECKER-CRONKITE METHOD