HEMA LAB- Methods of Blood Collection Flashcards Preview

► Med Misc 05 > HEMA LAB- Methods of Blood Collection > Flashcards

Flashcards in HEMA LAB- Methods of Blood Collection Deck (32):
1

peripheral blood is obtained from which sites (2) in adults

1) tip of 3rd or 4th finger
2) earlobe

2

ideal depth of puncture in skin puncture

2-3 mm

3

why must squeezing puncture site in skin puncture be avoided

alters the composition of blood

4

difficulty in blood collection in skin puncture can be relieved by

applying warm compress

5

essential for tests that require anticoagualation (Except for microtechniques)

venipuncture

6

most convenient method of blood collection

venipuncture

7

reason why venipuncture is the most convenient method of blood collection

it reduces the number and variety of apparatus required

8

methods of performing venipuncture

syringe method
evacuated tube method

9

depth of needle in venipuncture

0.5 - 1 cm

10

after obtaining required amount of blood, patient must never ____

flex the arm

11

peripheral blood from infants obtained from (2)

heel
big toe

12

peripheral blood from newborns obtained from

heel

13

method recommended for whole blood clotting time technique

two-syringe method

14

what happens to the jugular veins when the infant cries

becomes more prominent

15

thin, flexible, hollow tubes inserted and positioned into a vein in order to access the bloodstream for delivery of therapies

CVADs

16

CVAD meaning

Central Venous Access Devices

17

two types of CVAD

catheter
port

18

type of CVAD
have one end positioned externally like PICC

catheter

19

PICC meaning

Peripherally inserted central catheters

20

type of CVAD
surgically placed internally

port

21

3 methods/procedure of blood collection from CVAD

Discard method
Push-pull method
Re-infusion method

22

angle in arterial puncture

35 - 40

23

prevention of hemolysis during blood collection
skin puncture (2)

use sharp lancet
avoid squeezing area near the site

24

prevention of hemolysis during blood collection
venipuncture (7)

1. use a sharp, smooth needle
2. penetrate uppermost wall of the vein fully
3. check and make sure the tourniquet is NOT TOO TIGHT when aspirating blood
4. aspirate blood gently
5. remove needle before transferring blood to tubes (syringe method)
6. mix tube by gentle inversion if the tubes contain additives
7. if serum is needed, do not rim and centrifuge the blood until a clot has formed

25

prevention of hemolysis during blood collection
arterial puncture (2)

use a sharp needle
avoid excessive needle manipulation

26

how many mL of blood is aspirated when using the discard method of blood collection from CVAD

3-6 mL

27

how many mL of blood is aspirated when using the re-infusion method of blood collection from CVAD

3-6 mL

28

how many mL of blood is aspirated when using the push-pull method of blood collection from CVAD

6 mL

29

CVAD is flushed with what solution

normal saline solution

30

CVAD is flushed with NSS in which method/s

push-pull
discard

31

vein that runs from an angle of the mandible to the submandibular area

external jugular vein

32

how to immobilize arms of the infant during external jugular vein puncture

wrap infant in a sheet

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