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FCP - Surgery Week > Suture Materials > Flashcards

Suture Materials Flashcards

1
Q

Suture definiton

A

Material used to promote wound healing by surgically joining margins or ends of the wound and holding them securely together to reduce wound tension

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2
Q

Suturing Definition

A

Process of applying a suture

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3
Q

Ligature Definition

A

Material used to close blood vessels and stop haemorrhage

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4
Q

What makes an ideal suture material?

A

High tensile strength
Easy-to-use for surgeons
Easy to tie, secure knot
Highly uniform tensile strength, permitting the use of finer size
Inhibit tissue reactions and wicking
Non-toxic, non-carcinogenic and non-allergenic, as should any degradation products
Easily sterilised
Surface must minimise bacterial adhesion
Standardisable characteristics
Maintain its properties for sufficient time
Inexpensive

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5
Q

Natural meaning and example

A

○ Raw materials from naturally occurring sources
E.g. Catgut - from submucosa of SI of sheep/cattle

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6
Q

Synthetic meaning and example

A

Raw material produced in an industrial process
E.g. many different polymers

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7
Q

Metal

A

Stainless steel

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8
Q

Absorbable meaning

A

Materials fully degraded and absorbed by the body

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9
Q

Non-absorbable meaning

A

Materials that stay in place for an indefinite period without changing in any way

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10
Q

Monofilament Meaning

A

Consisting of a single filament with variable thickness/diameter

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11
Q

Multifilament Meaning

A

Bundles of very fine filaments formed into a thicker thread of desired diameter
Usually braided

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12
Q

Tensile strength definition

A

Breaking strength per unit area
Resistance of a material to breaking under tension

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13
Q

Memory meaning

A

Tendency to retain original configuration
Monofilament have a higher memory than multifilament
Monofilaments may be harder to tie safe/secure knots

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14
Q

What is ‘chatter’ and tissue drag?

A

How easily suture material passes through tissues
Lack of smoothness or friction whilst passing though tissue
We want low ‘chatter’
Monofilaments have lower ‘chatter’ than multifilament

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15
Q

What is tissue reaction?

A

Response of implantation of sutures
Suture counts as foreign body and can provoke an inflammatory response

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16
Q

Advantages and Disadvantages of absorbable sutures

A

Advantages
They dissapear
Low risk of long-term foreign body reaction
Disagvantages
Lose strength
Limited period of wound support

17
Q

Advantages and Disadvantages of Nom-absorbable sutures

A

Advantages
Permanent
Provide indefinite wound support
Disagvantages
Do not disappear
Possibility of foreign-body reactions

18
Q

Advantages and Disadvantages of multifilament/braided sutures

A

Advantages
Easy to handle
Excellent knotting (very secure)
Disadvantages
Greater friction
More tissue trauma

19
Q

Advantages and Disadvantages of monofilament sutures

A

Advantages
Minimal tissue trauma
Passes through tissues easily
No capillary action
Disadvantages
Harder to handle
Harder to knot
Require different knotting for greater security

20
Q

Advantages and Disadvantages of natural sutures

A

Advantages
Easy to handle
Easy to knot (compared to synthetic monofilament)
High histocompatibility
Disadvantages
Moderate-high tissue reaction
Low tensile strength

21
Q

Advantages and Disadvantages of synthetic sutures

A

Advantages
High tensile strength
Predictable biological behaviour
Disadvantages
Poorer knotting than natural materials

22
Q

What are the consequences of using suture material?

A

Stimulation of tissue reaction due to present of foreign body
Potential for colonisation of bacteria
More likely with multifilament as there is higher SA for colonisation

23
Q

When would hydrolysis occur?

A

More aggressive
Use of natural suture material
e.g. Catgut

24
Q

When would hydrolysis occur?

A

Use of synthetic suture material
Smaller tissue reaction

25
Q

What are the ways of sizing suture materials?

A

USP - United States pharmacopeia
Metric System

26
Q

What is USP - United States pharmacopeia?

A

Based on tensile strength rather than diameter
11-0 to 7
Increasing size/strength
(11-0, 10-0, 9-0 … 0 … 1, 2, 3, etc)

27
Q

What is the metric system?

A

1/10mm of diameter of suture (‘2’ = 0.2 mm)
§ Sizes are related to diameter (more logical)
§ 0.1-10

FCP - Surgery Week (18 decks)

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