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Surgical MCQs > Instruments and Materials > Flashcards

Flashcards in Instruments and Materials Deck (31):
1

Stainless steel blades are sharper than carbon steel blades.

F
Carbon steel sharper

2

The most common scalpel and blade system used in dermatological surgery is the Bard-Parker

T

3

Carbon steel blades will maintain their sharpness longer than stainless steel blades.

F
Stainless steel sharpness lasts longer

4

Teflon coatings on scalpel blades reduce drag when cutting through tissue.

T

5

The #10 blade is wide with a sharp, convex belly, making it ideal for large excisions on thick skin, such as the trunk.

T

6

The #11 blade is tapered to a sharp point and used primarily for incision and drainage or for cutting sharp angles on flaps.

T

7

The #15 blade is shaped like a smaller version of the #10 blade.

T
used most often in derm surg

8

The Beaver handle is the handle of choice for large excisions on thick skin.

F
Best for small delicate work.

9

The iris scissor is sharp-tipped, short-handles and most often used for blunt or sharp dissection and cutting on the head and neck.

T

10

The Westcott scissor is similar to the iris scissor, except the blades are curved and tapered to a fine point tip.

F
This is true for the Gradle scissor

11

The Gradle scissor is unique in that it operates on a spring system where the blades come together as the handle arc is squeezed.

F
This is true for the Westcott scissor

12

The Mayo scissor has an almost 1-to-1 handle to blade ratio and is used for coarse dissection.

T

13

The Metzenbaum scissor is long-handled and is ideal for blunt or sharp dissection in areas that require a long reach.

T

14

Scissors that are used for cutting tissue will dull much faster if used to cut sutures as well.

T

15

Serrated forceps allow a firm grasp of tissue with reduced crush injury.

F
This is true for toothed forceps

16

Adson forceps have a relatively broad handle that tapers to a long, narrow tip.

T
They can be toothed or serrated

17

Skin hooks are less traumatic to the epidermis than forceps.

T

18

Haemostats are used for haemostasis of bleeding vessels.

T

19

Dull curettes create excessive tissue trauma and suboptimal outcome.

T

20

Tensile strength is not analogous to suture strength.

F

21

Suture strength is calculated by dividing the weight necessary to break the suture by its cross-sectional area.

T

22

Monofilament and synthetic sutures have less tissue reactivity than polyfilament and natural sutures.

T

23

Absorbable suture loses most of its tensile strength within 120 days of placement through either enzymatic digestion or tissue hydrolysis.

F
60 days, everything else is true

24

Surgical gut is rapidly degraded in 14 days.

F
4-5 days

25

The disadvantages of surgical gut include poor tensile strength, high tissue reactivity and poor knot stability.

T

26

Polydiaxone (PDS) is absorbed much faster than Dexon or Vicryl suture.

F
Much more slowly

27

Polyglactin 910 (Vicryl) is ideal for suturing cartilage because of its minimal tissue reactivity.

F
This is true for PDS

28

Oils and grease can be used for lubricating instruments.

F
Harden during sterilisation

29

Steam sterilisation is the most popular office method of sterilisation.

T

30

Steam autoclaves do not affect the sharpness of instruments.

F
Can dull sharp instruments

31

A chemical autoclave is similar to a steam autoclave, but uses formaldehyde and alcohol instead of distilled water.

T
Causes less dulling of instruments