CLINICAL CHEMISTRY

Question 1

Common site for venipuncture

Answer 1

ANTECUBITAL FOSSA

Question 2

Preferred vein for venipuncture

Answer 2

Median cubital vein

Question 3

Second choice vein and often the only vein felt in obese patients

Answer 3

CEPHALIC VEIN

Question 4

Last choice

Not well anchored and rolls easily
Increased risk of puncturing a median cutaneous nerve branch or the brachial artery

Not recommended unless no other vein in either arm is more prominent

Answer 4

BASILIC VEIN

Question 5

T or F

veins on the back of the hand and wrist may also be used for venipuncture

Answer 5

TRUE

Question 6

T or F:

veins on the underside of the wrist, however, should never be used for venipunciure.
Leg, ankle, and foot veins are sometimes used but not without permission of the patient’s physician, due to a potential for significant medical complications.

Answer 6

TRUE

Question 7

The time it takes for SERUM to clot?
Centrifugation approx.______

Answer 7

30 minutes

10 minutes at an RCF of 1000-2000 g

Question 8

What sample use for emergency cases? Why?

Answer 8

HEPARINIZED PLASMA
- Stat and other tests requiring a fast turnaround time (TAT) are often coilected in tubes containing heparin anticoagulant because they can be centrifuged immediately to obtain plasma.

Question 9

Used for most hematology tests and many POCT’s

Answer 9

WHOLE BLOOD

Question 10

Preferred method for venipuncture

Answer 10

ETS

Question 11

Application of tourniquet must NOT BE LEFT on LONGER than ______

Tourniquet size________ wide and ______long

Answer 11

<1 minute
1 inch wide x 15 inch long

Question 12

Gauge and bore relationship

Answer 12

INVERSELY related

Question 13

Considered standard gauge for routine venipuncture

Answer 13

21 gauge

Question 14

Preferred needle length

Answer 14

1 inch- provides better control

Question 15

Preferred needle gauge for pediatric patients

Answer 15

23 gauge

Question 16

handheld medical device that helps medical staff visualize veins before phlebotorny

Answer 16

AccuVein

Question 17

Accuvein emits what light and held about _____ over the potential pheb site.

Answer 17

INFRARED light; 7 inches

Question 18

Tube that can activate coagulation pathway (intrinsic)

Answer 18

Red (glass)- negatively charge

Question 19

Preferred anticoagulant for PBS

Answer 19

K3 EDTA in liquid form

Question 20

Preferred anticoagulant for hematology

Answer 20

K2 EDTA/ spray-dried

Question 21

Tube in blood banking

Answer 21

Pink

Question 22

Molecular diagnostics

Answer 22

White

Question 23

What is the anticoagulant used in light blue top?

2 concentration:
______
______

What concentration has the risk for over-anticoagulation and used primarily to patients having hight HCT. ?

Inversion:______

Answer 23

Sodium citrate

3.2%
3.8%

3.8%

3-4x

Question 24

Tube for ESR?

Blood to anticoagulant ratio

Answer 24

Black

4:1

Question 25

Green, light green/black anticoagulant: ______ The universal anticoagulant

Answer 25

Sodium heparin, lithium heparin —-can administer IV to patients Least interferences

Question 26

Contains sodium heparin, EDTA For toxicology

Answer 26

Royal blue

Question 27

Gray tube anticoagulant? Gray tube additive?

Answer 27

Potassium oxalate Sodium fluoride

Question 28

Sterile containing sodium polyanetholsulfonate

Answer 28

Yellow

Question 29

Binds Mg2+ thus inhibiting the Mg dependent enzyme, enolase

Answer 29

Sodium fluoride

Question 30

Containes ACD, for blood banking, HLA phenotyping and paternity testing

Answer 30

Yellow

Question 31

Tan (glass) contains?

Answer 31

Sodium heparin - for plasma/lead testing -Inhibits thrombin formation

Question 32

Tan (plastic) contains?

Answer 32

K2EDTA Plasma lead testing Chelates(binds) calcium

Question 33

Thrombin containing tube A clot activator

Answer 33

Yellow/gray and orange 5 minutes-clotting

Question 34

Preferred specimen for newborn screening test

Answer 34

Capillary blood

Question 35

Length of lancet

Answer 35

<2.0 mm to avoid penetrating bone

Question 36

Sites for capillary puncture?

Answer 36

1. Palmar surface of 3rd and 4th fingers 2. Lateral plantar heel surface (preferred for newborn) 3. Earlobes

Question 37

For blood gas analysis and pH measurements

Answer 37

Arterial puncture

Question 38

Are used instead of evacuated tubes because of the pressure in an arterial blood vessel

Answer 38

Syringes

Question 39

Preferred anticoagulant in arterial puncture

Answer 39

Heparin

Question 40

Primary arterial sites (in order of preferences)

Answer 40

1. Radial 2. Brachial 3. Femoral arteries

Question 41

Major complications of arterial puncture

Answer 41

Thrombosis Hemorrhage Infection

Question 42

Done before collection of arterial blood from radial artery

Answer 42

Modified allen test

Question 43

Array of signs and symptoms resulting from increased cortisol

Answer 43

Cushing syndrome

Question 44

Increased ACTH from the pituitary gland resulting to increased cortisol

Answer 44

Cushing disease