Test Tubes, Additives & Tests #1

1

100

___ The yellow-top tube is primarily used for:
 A. Coagulation tests
 B. Blood cultures and sterile specimens
 C. Glucose tolerance tests
 D. Hematology tests

B. Blood cultures and sterile specimens

200

___ The additive in the yellow-top tube is:
 A. Sodium fluoride
 B. EDTA
 C. Sodium polyanetholesulfonate (SPS)
 D. Sodium citrate

C. Sodium polyanetholesulfonate (SPS)

300

___ The additive sodium citrate prevents coagulation by:
 A. Destroying calcium
 B. Binding calcium
 C. Activating thrombin
 D. Inhibiting glycolysis

 A. Destroying calcium

400

___ The blue-top tube is commonly used for:
 A. Coagulation studies (PT, PTT, fibrinogen)
 B. Chemistry tests
 C. Blood cultures
 D. Glucose tolerance

 A. Coagulation studies (PT, PTT, fibrinogen)

500

___ Before drawing a blue-top tube, you should:
 A. Shake it 10 times
 B. Draw 2–3 mL of blood in a tube without additives first
 C. Draw it last
 D. Invert it once

 B. Draw 2–3 mL of blood in a tube without additives first

2

100

___ Red-top tubes usually contain:

 A. Heparin

 B. EDTA

 C. No additives

 D. Sodium citrate

C. No additives

200

___ Red-top tubes are commonly used for:
 A. CBC
 B. Coagulation testing
 C. Serum determinations (chemistry, blood bank)
 D. Glucose tolerance

 C. Serum determinations (chemistry, blood bank)

300

___ The thixotropic gel in some red or gold tubes:
 A. Acts as an anticoagulant
 B. Separates serum from cells during centrifugation
 C. Promotes coagulation
 D. Preserves glucose

B. Separates serum from cells during centrifugation

400

___ Green-top tubes contain:
 A. Heparin (sodium or lithium)
 B. EDTA
 C. Sodium citrate
 D. Potassium oxalate

A. Heparin (sodium or lithium)

500

___ The green-top tube is commonly used for:
 A. Blood cultures
 B. Hematology
 C. Routine chemistry tests
 D. Glucose tolerance

 C. Routine chemistry tests

3

100

__ Lavender-top tubes contain which additive?
 A. Sodium citrate
 B. EDTA
 C. Heparin
 D. Sodium fluoride

 B. EDTA

200

___ EDTA functions by:

 A. Binding calcium

 B. Enhancing thrombin

 C. Promoting clotting

 D. Inhibiting glycolysis

 A. Binding calcium

300

___ Lavender-top tubes are used for:
 A. Coagulation testing
 B. Blood culture
 C. Hematology (CBC, ESR, retic count)
 D. Chemistry

C. Hematology (CBC, ESR, retic count)

400

___ The gray-top tube additive combination includes:
 A. EDTA and sodium citrate
 B. Sodium fluoride and potassium oxalate
 C. Heparin and gel
 D. SPS and dextrose

 B. Sodium fluoride and potassium oxalate

500

___ The gray-top tube is used for:
 A. Glucose and lactic acid measurement
 B. Hematology
 C. Blood culture
 D. Serum chemistry

A. Glucose and lactic acid measurement

4

100

___ Royal blue tubes are typically used for:
 A. Coagulation tests
 B. Toxicology and nutritional studies
 C. Blood cultures
 D. CBC

 B. Toxicology and nutritional studies

200

___ Tan-top tubes are used for testing:
 A. Glucose
 B. Lead                                                                 C. Coagulation
 D. Blood culture

 B. Lead  

300

___ The additive in tan-top tubes is:
 A. Heparin
 B. Sodium fluoride
 C. EDTA
 D. SPS

C. EDTA

400

__ The light blue-top tube contains:
 A. Sodium citrate
 B. EDTA
 C. Heparin
 D. Sodium fluoride

A. Sodium citrate

500

___ Tubes with anticoagulants must be filled completely to:
 A. Ensure proper color separation
 B. Maintain correct blood-to-additive ratio
 C. Prevent cell lysis
 D. Reduce clotting time

 B. Maintain correct blood-to-additive ratio

5

100

__ Anticoagulants prevent blood from:
 A. Clotting
 B. Hemolyzing
 C. Settling
 D. Separating

 A. Clotting

200

___ Heparin inhibits:
 A. Thrombin
 B. Calcium
 C. Glycolysis
 D. Platelet activation

 A. Thrombin

300

___ Clot activators function to:
 A. Inhibit glycolysis
 B. Promote coagulation
 C. Preserve glucose
 D. Bind calcium

 B. Promote coagulation

400

___ Which additive works by enhancing antithrombin activity?
 A. EDTA
 B. Heparin
 C. Sodium citrate
 D. SPS

 B. Heparin

500

___ Sodium fluoride acts as a:
 A. Coagulant
 B. Preservative that inhibits glycolysis
 C. Clot activator
 D. Separator

B. Preservative that inhibits glycolysis