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Intravenous cannulation

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Intravenous cannulation

7
Q. 1 Artery cannulated most commonly for invasive blood pressure monitoring is:      

March 2013 (f)

 A Femoral artery
 B

Carotid artery
 C

Radial artery
 D

Ulnar artery
Q. 2

Radial artery is cannulated to measure:

March 2013 (f)

 A

Heart rate
 B

Blood pressure
 C

CVP
 D

End tidal CO2
Q. 3

A patient had a massive bleeding during surgery. Which sized cannula should be used?

 A

16 Gauge
 B

20 Gauge
 C

22 Gauge
 D

24 Gauge
Q. 4

A young patient has been admitted with RTA and had massive hemorrhage. He needs to be transfused with large amounts of fluids. Which IV cannula is preferred?

 A

Grey
 B

Green
 C

Blue
 D

Pink
Q. 5

A patient came with profuse diarrhea and dehydration reaches OPD. For examination flow of fluids which cannula can be inserted:

 A

Green
 B

Blue
 C

Grey
 D

Violet
Q. 6

In a patient with dehydration, which of the following color intravenous cannula will you place for rapid fluid resuscitation?

 A

Grey
 B

Blue
 C

Pink
 D

Green
Q. 7

What is the size of green colored IV cannula?

 A

18
 B

20
 C

22
 D

24
Q. 1

Artery cannulated most commonly for invasive blood pressure monitoring is:      

March 2013 (f)

 A

Femoral artery
 B

Carotid artery
 C

Radial artery
 D

Ulnar artery
Ans. C
Explanation:

Ans. C i.e. Radial artery

Q. 2

Radial artery is cannulated to measure:

March 2013 (f)

 A

Heart rate
 B

Blood pressure
 C

CVP
 D

End tidal CO2
Ans.
B
Explanation:

Ans. B i.e. Blood pressure

Arterial cannulation

  • It is a commonly performed procedure in the management of patients who are critically ill.
  • An indwelling arterial catheter allows for continuous blood pressure (BP) monitoring, frequent blood sampling, and arterial blood gas measurement.
  • Arterial catheters can be placed at the bedside and have been found to be relatively safe, with a low incidence of serious complications.
  • Arteries used for catheterization include the radial, ulnar, brachial, axillary, femoral, posterior tibial, and dorsalis pedis.
  • Of these, the radial artery is most commonly used in both adults and children.
  • The radial artery is chosen primarily because of the superficial nature of the vessel and ease of maintenance of the site
Q. 3 A patient had a massive bleeding during surgery. Which sized cannula should be used?
 A

16 Gauge
 B

20 Gauge
 C

22 Gauge
 D

24 Gauge
Ans.
A
Explanation:

Ans: A. 16 Gauge

(Ref Bailey 25/e p291)

  • In a patient with massive bleeding, there is always a risk of patient going into shock and widest bore cannula available showed be used for cannulation.
  • The ACLS guidelines recommend securing intravenous access with two large-bore cannulae (14–I6G) in patient needing resuscitation.

Gauge

Color code

External Diameter

Length

Flow Rate

14G

Orange°

2.1 mm

45 mm

240 ml/min

16G

Grey(‘

1.8 mm

45 mm

180 ml/min

18G

Green°

1.3 mm

32/45 mm

90 ml/min

20G

Pink°

1.1 mm

32 mm

60 ml/min

22G

Blue°

0.9 mm

25 mm

36 ml/min

24G

Yellow°

0.7 mm

19 mm

20 ml/min

26G

Violee

0.6 mm

19 mm

13 ml/min
Q. 4 A young patient has been admitted with RTA and had massive hemorrhage. He needs to be transfused with large amounts of fluids. Which IV cannula is preferred?
 A Grey
 B

Green
 C

Blue
 D

Pink
Ans.
B
Explanation:

Ans: B. Green

used for routine blood transfusions, transfusing large volumes of fluid, intravenous feeding of patients and the harvesting and separation of stem cells.

Refi ATLS 18th edn; 2018, Chapter 3 Shock

Color Size External diameter(mm) Length(mm) Water flow rate (mL/min) Recommended uses
Orange 14G 2.1 mm 45 mm -240 mL/min

Trauma, rapid blood  transfusion, surgery
Gray 16G 1.8 mm 45 mm —180 mL/min

Rapid fluid replacement, trauma, rapid blood transfusion
Green 18G 1.3 mm 32 mm —90 mL/min

Large volumes of fluid, Rapid fluid replacement, trauma, rapid blood transfusion
Pink 20G 1.1 mm 32 mm —60 mL/min

Most infusions, rapid fluid replacement, trauma, routine blood transfusion
Blue 22G 0.9 mm 25 mm —36 mL/min Most infusions

Neonate, pediatric, older adults routine blood transfusion
 Yellow  24G  0.7 mm  19 mm  —20 mL/min Most infusions neonate, pediatric, older adults, routine blood transfusion, neonate or pediatric blood transfusion
 Purple  26G  0.6 mm  19 mm  —13 mL/min Pediatrics, Neonate
Q. 5 A patient came with profuse diarrhea and dehydration reaches OPD. For examination flow of fluids which cannula can be inserted:
 A Green
 B

Blue
 C

Grey
 D

Violet
Ans.
C
Explanation:

Ans: C. Grey

•     Grey is 16G cannula and wider the bore, higher the flow rate. Here the key is the rapid fluid replacement.

External diameter(mm)- 1.8 mm

Length(mm)- 45 mm

Water flow rate (mL/min)-—180 mL/min

uses- Rapid fluid replacement, trauma, rapid blood transfusion

Green- Large volumes of fluid,  trauma, rapid blood transfusion

Q. 6

In a patient with dehydration, which of the following color intravenous cannula will you place for rapid fluid resuscitation?

 A Grey
 B

Blue
 C

Pink
 D

Green
Ans.
A
Explanation:

Ans:. A. Grey 

Gauge

Color code

External Diameter

Length

Flow Rate

14G

Orange

2.1 mm

45 mm

240 ml/min

16G

Grey

1.8 mm

45 mm

180 ml/min

18G

Green

1.3 mm

32/45 mm

90 ml/min

20G

Pink

1.1 mm

32 mm

60 ml/min

22G

Blue

0.9 mm

25 mm

36 ml/min

24G

Yellow

0.7 mm

19 mm

20 ml/min

26G

Violet

0.6 mm

19 mm

13 ml/min
Q. 7 What is the size of green colored IV cannula?
 A 18
 B

20
 C

22
 D

24
Ans.
A
Explanation:

Answer- A. 18

 

Cannula size Colour Time to infuse 1000ml Normal saline under ideal circumstances
22 G Blue 22 min
20 G* Pink 15 min
18 G Green 10 min
16 G Grey 6 min
14 G* Red 3.5 min