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Surgical Principles 1 > Suture materials and needles > Flashcards

Suture materials and needles Flashcards

1
Q

3 Properties of Suture classification

A

Absorbable vs. non absorbable
Monofilament vs. multifilament
Organic vs. synthetic

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2
Q

Suture characteristics (6)

A

Size, flexibility, surface characteristics/coating, capillarity, tensile strength, knot security

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3
Q

Properties of ideal suture material (8)

A

Minimal tissue reaction
gentle passive through tissues
High knot safety and security
Consistent performance
good and predictable absorption
Comfortable handling

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4
Q

Standard unit of measure for suture size

A

United States Pharmacopeia

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5
Q

Smallest suture size

A

12-0

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6
Q

Largest suture size

A

7-0

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7
Q

Smaller suture size…

A

Less tensile strength and more breakable

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8
Q

T/F Sutures need to be no stronger than the sutured tissue

A

True

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9
Q

More flexible suture is better for ___

A

Vessel ligation

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10
Q

More flexible suture =

A

Less memory/stiffness

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11
Q

What is suture flexibility related to

A

material and size of suture

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12
Q

T/F: Multifilament suture has more flexibility compared to monofilament

A

True

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13
Q

Affects ease of passing suture through tissue

A

Suture characteristics and coating
FRICTION

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14
Q

Less friction and less traumatic to tissues
Decreased knot security

A

Smooth suture

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15
Q

Increased friction and more traumatic (more tissue drag)
Improved knot security

A

Braided material

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16
Q

What can braided material be coated to do?

A

Decrease drag

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17
Q

process by which fluid and bacteria are wicked along multifilament materials

A

Capillarity

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18
Q

Capillarity allows what to persist in suture

A

infection

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19
Q

T/F: All braided sutures have capillarity

A

true - but it is reduced in coated structures

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20
Q

Measure of a tissue or fibers ability to resist deformation or breakage

A

Tensile strength

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21
Q

Amount of force necessary to cause a knot to slip

A

Knot strength

22
Q

Knot strength is related to

A

Static friction and plasticity of material

23
Q

Lower friction

A

Decreased knot strength

24
Q

Which suture will have decreased knot strength compared to 2-0 multifilament

A

2-0 monofilament

25
Q

Larger diameter suture has

A

Decreased knot security

26
Q

Absorbable suture materials

A

Chromic gut, polyglactin 910, polyglycolic acid, Glycomer 631, capro, poliglecaprone 25, polydiaxonone

27
Q

Non absorbable suture

A

Nylon, silk, polyproylene, polymerized capro, stainless steel wire

28
Q

How should needle type and size be chosen?

A

Based on tissue being sutured and depth of wound being sutured

29
Q

What are surgical needles made of?

A

Stainless steel

30
Q

More common used needle shape

A

1/2 circle

31
Q

Commonly used and more easily manipulated through superficial tissue and also closing vessels

A

3/8 circle

32
Q

Used for opthalamic procedures

A

1/4 circle

33
Q

Used in confined locations or deep tissue

A

5/8 circle

34
Q

Manipulated with fingers - placement of purse string suture

A

Straight needle

35
Q

sharp tip that pierces and spreads tissue without cutting. Used for intestine, SQ tissue and fascia

A

Taperpoint

36
Q

COmbination of reverse cutting and taperpoint
Used for heavy, thick fascia, vascular grafts

A

Tapercut

37
Q

Cutting edge on concave portion of needle. Tends to cut out of tissue

A

Cutting

38
Q

Cutting edge on convex surface reducing risk of tissue cut out. used for skin

A

Reverse cutting

39
Q

Flat on top and bottom. Used for opthalamic procedures

A

Spatula point

40
Q

blunt point that dissects thru friable tissues without cutting
used for parenchymal organs (liver, kidney)

A

Blunt point

41
Q

Absorbable (phagocytosis) multifilament (twisted) organic (90% collagen, sheep gut)
Knot security decreases when wet
Not used frequently in practice

A

Chromic gut

42
Q

Absorbable (hydrolysis), multifilament (braided), synthetic (copolymer of lactide and glycolide and coated with calicum stearate)
Used in dental surgery
Stable in contaminated wound, rapidly degraded in infected bladder

A

Polyglactin 910

43
Q

Absorbable (Hydrolysis), multifilament (braided), synthetic (filaments from glycolic acid)
Used in dental surgery
Stable in contaminated wound, rapidly degraded by bladder

A

Polyglycolic acid

44
Q

Absorbable (hydrolysis), Monofilament, synthetic
Used in closure of cystonomies (non infected bladder), SQ tissues

A

Poliglecaprone 25 - monocryl

45
Q

Absorbable (hydrolysis), monofilament, synthetic (polyester)
UseS: Closure of enterotomies, cystomies, body wall closure, fascia closure

A

Glycomer 631 (biosyn)

46
Q

Absorbable (hydrolysis, prolonged absorbable), monofilament, synthetic (uncoated)
Uses: Closure of enterotomies, cystotomies, body wall closure, fascia closure

A

Polidioxanone (PDS)

47
Q

Non absorbable, multifilament (braided), natural
Used for CV surgery

A

Silk

48
Q

Non absorbable (susceptible to degradation, hydration leads to disruption of H bonds leading to loss of tensile strength), monofilament, synthetic
Used for skin closure, orthopedic repair (lateral tibiofabellar suture)

A

Nylon

49
Q

Nonabsorbable (resistant to degradation, lack of hydrolyzable bonds), monofilament, synthetic
Uses: tendon, ligament, fascial, joint capsule closures, immunocompromised ptx

A

Polypropylene

50
Q

Non absorbable, multifilament (twisted), synthetic (nylon based),
Uses: Skin sutures ONLY
Not recommended for implantation in tissues due to sinus formation

A

Polymerized caprolactam

51
Q

Nonabsorbable, monofilament or twisted form
Uses: Orthopedic application

A

Stainless steel

52
Q

Metal contents of stainless steel suture

A

High nickel and chromium content

Surgical Principles 1 (1 decks)

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