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Biomechanics & Surgery Exam 1 > 1. Sutures > Flashcards

1. Sutures Flashcards

1
Q

Generic name for poliglecaprone

A

Monocryl

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2
Q

how long does non-absorbable sutures maintain tensile strength for?

A

longer than 60 days

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3
Q

name the natural non-absorbable suture types.

A

silk
cotton, linen
nylon

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4
Q

describe the tensile strength and tissue reactivity of silk.

A

low tensile strength (slowly absorbable)

highly tissue reactive

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5
Q

describe the tensile strength and reactivity of nylon.

A

high tensile strength

low tissue reactivity

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6
Q

which suture type may be used in contaminated wounds?

A

nylon (non-absorbable)

polypropylene

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7
Q

what is stainless steel suture used for?

A
  • bone fixation
  • tendon repair (not utilized all that much for this indication anymore)
  • retention sutures
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8
Q

what is a swage?

A

the back of the needle where the suture material attaches

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9
Q

what is the most common suture attachment?

A

swaged (eyeless) - this is when the suture is directly attached into needle to decrease tissue damage

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10
Q

what is the most typical body length of a needle?

A

3/8

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11
Q

which type of point should you used for a paratenon, tendon sheath, or sub-Q?

A

tapered

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12
Q

What are the 2 configurations of suture material? Which is better suited for contaminated wounds?

A
  1. monofilament- better suited for contaminated wounds

2. braided

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13
Q

what is teh coefficient of friction of monofilament suture compared to braided?

A

monofilament has a low coefficient of friction compared to braided suture which has a high coefficient of friction
(braided though has greater strength and capillarity)

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14
Q

what is capillarity?

A

(characteristic of braided sutures)

  • fluid and bacteria may penetrate into interstices of braided suture
  • PMNs, and macrophages are too large to reach interstices
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15
Q

what is the purpose of coating a suture?

A
  • helps decrease capillarity
  • improves handling
  • reduces drag
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16
Q

What is Class 1 non-absorbable surgical suture?

A

suture composed of silk or synthetic fibers, monofilament or braided

17
Q

What is Class 2 non-absorbable surgical suture?

A

suture composed of natural or synthetic fibers but consisting of a coating

18
Q

What is a class 3 non-absorbable surgical suture?

A

suture composed of monofilament or multifilament metal wire

19
Q

What is the trade name for polygloycolic acid?

A

Dexon- S

20
Q

What is the trade name for polyglycolic acid (with coating)?

A

Dexon-plus

21
Q

What is the trade name for polyglactin 910

A

vicryl

22
Q

What is the trade name for a polymer of polydiaxonone?

A

PDS

23
Q

what is the trade name for polyglyconate?

A

maxon

24
Q

what is the most common brand for nylon?

A

ethilon

25
Q

what is the most common brand for polypropylene?

A

prolene

26
Q

what is the most common brand for polybutester?

A

novafil

27
Q

what is teh most common brand for polyester?

A

mersilene

ethibond

28
Q

which synthetic absorbable sutures are monofilament (and which are multifilament, braided)?

A

PDS, Maxon, and Monocryl- are monofilament

Dexon and vicryl are multifilament, braided

29
Q

state in increasing order the relative tensile strengths of non-absorbable sutures.

A 
naturals (silk, linen, cotton)- least tensile strength 
polypropylene
braided nylon
polybutester
monofilament nylon 
uncoated, braided polyester
coated, braided polyester
stainless steel - greatest tensile strength
30
Q

state in increasing order the relative tissue reactivity of non-abosrbable sutures.

A 
monofilament polypropylene- least reactive
monofilament polybutester
monofilament nylon 
stainless steel wire
polybutilate-coated polyester
teflon/silicon-coated polyester
uncoated braided polyester
natural fiber materials- greatest reactivity
31
Q

how are natural , absorbable sutures degraded? compare this to how synthetic, absorbable sutures are degraded.

A

nautral- degraded by lysosomes

synthetic- degraded by hydrolysis

32
Q

which suture type is used when strong apposition of a tissue is needed (i.e. repairing tendon)?

A

polyester

Biomechanics & Surgery Exam 1 (14 decks)

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