Instruments and Materials Flashcards

1
Q

Stainless steel blades are sharper than carbon steel blades.

A

F

Carbon steel sharper

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2
Q

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

A

T

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3
Q

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

A

F

Stainless steel sharpness lasts longer

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4
Q

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

A

T

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5
Q

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

A

T

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6
Q

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

A

T

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7
Q

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

A

T

used most often in derm surg

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8
Q

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

A

F

Best for small delicate work.

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9
Q

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

A

T

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10
Q

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

A

F

This is true for the Gradle scissor

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11
Q

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

A

F

This is true for the Westcott scissor

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12
Q

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

A

T

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13
Q

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

A

T

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14
Q

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

A

T

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15
Q

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

A

F

This is true for toothed forceps

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16
Q

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

A

T

They can be toothed or serrated

17
Q

Skin hooks are less traumatic to the epidermis than forceps.

A

T

18
Q

Haemostats are used for haemostasis of bleeding vessels.

A

T

19
Q

Dull curettes create excessive tissue trauma and suboptimal outcome.

A

T

20
Q

Tensile strength is not analogous to suture strength.

A

F

21
Q

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

A

T

22
Q

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

A

T

23
Q

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

A

F

60 days, everything else is true

24
Q

Surgical gut is rapidly degraded in 14 days.

A

F

4-5 days

25
Q

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

A

T

26
Q

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

A

F

Much more slowly

27
Q

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

A

F

This is true for PDS

28
Q

Oils and grease can be used for lubricating instruments.

A

F

Harden during sterilisation

29
Q

Steam sterilisation is the most popular office method of sterilisation.

A

T

30
Q

Steam autoclaves do not affect the sharpness of instruments.

A

F

Can dull sharp instruments

31
Q

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

A

T

Causes less dulling of instruments