HEMA LAB 17-20 Flashcards Preview

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Flashcards in HEMA LAB 17-20 Deck (38)
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1
Q

preferred anticoagulant for APTT

A

sodium citrate

2
Q

same lng ng pt ung rpm at number of minutes sa centrifuge

A

1 500 rpm for 15 mins

3
Q

APTT can measure platelets and factor XIII

A

false

4
Q

what factors can APTT measure?

A

factors VIII, IX, XI…also Prekallikren or FLetcher

5
Q

what therapy can APPT monitor

A

heparin theraphy

6
Q

used to measure the availability of functional fibrinogen

A

thrombin time

7
Q

when is TT prolonged?

A

cases of low levels of fibrinogen

  • fibrinogen function is impaired
  • presence of heparin, fibrin/fibrinogen products and thrombolytics agents(i.e. streptokinase)
8
Q

a soluble plasma protein that is instrumental in the normal coagulation process

A

fibrinogen

9
Q

another name for fibrinogen

A

factor I

10
Q

is added to undiluted plasma

A

low potency thrombin

11
Q

thrombin reagent consists of

A
  • thrombin time reagent (bovine)

- lyophilisate for 1mL

12
Q

end products of thrombin clotting assays

A

insoluble fibrin polymers

13
Q

basahin niyo nlng ung two stages sa lab manual (TT ito)

A

ANG INIT DITO SA DORM SHET

14
Q

what do you pour in a wassermann tube up to about one inch from the rim (CRT)

A

castor oil

15
Q

what do you use to aspirate blood up to the 20 cu mm mark (CRT)

A

sahli’s pipette

16
Q

what kind of formation do you want to observe on the surface of the drop of blood

A

formation of dimpling or nipple like protrusion

17
Q

indicates the endpoint of HIRSCHBOECK method

A

formation of dimpling or nipple like protrusion

18
Q

another name for HIRSCHBOECK method

A

castor oil method

19
Q

is stefanini or test tube method a qualitative or a quantitative test?

A

quantitative

20
Q

where do you place 3-5 ml of venous blood (stefanini method)

A

chemically clean wassermann tube

21
Q

do you use a water bath in the test tube method? (CRT)

A

yes

22
Q

observe the tube at what succession of hours? (CRT)

A

1, 2, 16, 18, 24 hours

23
Q

what to do when blood adheres to the wall of the tube (CRT)

A

rim the clot with a stiff straight wire to detach the clot from the wall of the tube

24
Q

Retraction begins within how many hours

A

1 hour

25
Q

Retraction usually ends within how many hours

A

18-24 hours

26
Q

what method of CRT are you using when there is a glass rod and a cork

A

Mac Farlane

27
Q

examine the blood for evidence of coagulation at what minute interval ? (CRT)

A

5-10 mins

28
Q

where do you place the sphygmomanometer cuff in the HESS test?

A

around the arm just above the elbow

29
Q

midway between the systolic and the diastolic pressure for 5 minutes

A

Quick’s

30
Q

35 mm Hg for 15 minutes

A

Gothlin’s

31
Q

how many minutes that have to elapse before you count the number of tiny spots

A

15-30 minutes

32
Q

grade of 21-50 petechiae

A

3+

33
Q

grade of 11-20 petechiae

A

2+

34
Q

number of petechiae in 4+

A

50 and above

35
Q

HESS test is also called?

A

Tourniquet test or RUMPEL-LEEDES test

36
Q

normal result of the HESS test

A

1+ (1-10 petechiae)

37
Q

other method of CRT that uses negative pressure of sufficiant degree to the skin and indirectly to the vascular tissue

A

suction or petechiometer

38
Q

normal value of the petechiometer method

A

> 4 petechiae at 200 mm Hg