1. Sutures Flashcards
Generic name for poliglecaprone
Monocryl
how long does non-absorbable sutures maintain tensile strength for?
longer than 60 days
name the natural non-absorbable suture types.
silk
cotton, linen
nylon
describe the tensile strength and tissue reactivity of silk.
low tensile strength (slowly absorbable)
highly tissue reactive
describe the tensile strength and reactivity of nylon.
high tensile strength
low tissue reactivity
which suture type may be used in contaminated wounds?
nylon (non-absorbable)
polypropylene
what is stainless steel suture used for?
- bone fixation
- tendon repair (not utilized all that much for this indication anymore)
- retention sutures
what is a swage?
the back of the needle where the suture material attaches
what is the most common suture attachment?
swaged (eyeless) - this is when the suture is directly attached into needle to decrease tissue damage
what is the most typical body length of a needle?
3/8
which type of point should you used for a paratenon, tendon sheath, or sub-Q?
tapered
What are the 2 configurations of suture material? Which is better suited for contaminated wounds?
- monofilament- better suited for contaminated wounds
2. braided
what is teh coefficient of friction of monofilament suture compared to braided?
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)
what is capillarity?
(characteristic of braided sutures)
- fluid and bacteria may penetrate into interstices of braided suture
- PMNs, and macrophages are too large to reach interstices
what is the purpose of coating a suture?
- helps decrease capillarity
- improves handling
- reduces drag
What is Class 1 non-absorbable surgical suture?
suture composed of silk or synthetic fibers, monofilament or braided
What is Class 2 non-absorbable surgical suture?
suture composed of natural or synthetic fibers but consisting of a coating
What is a class 3 non-absorbable surgical suture?
suture composed of monofilament or multifilament metal wire
What is the trade name for polygloycolic acid?
Dexon- S
What is the trade name for polyglycolic acid (with coating)?
Dexon-plus
What is the trade name for polyglactin 910
vicryl
What is the trade name for a polymer of polydiaxonone?
PDS
what is the trade name for polyglyconate?
maxon
what is the most common brand for nylon?
ethilon
what is the most common brand for polypropylene?
prolene
what is the most common brand for polybutester?
novafil
what is teh most common brand for polyester?
mersilene
ethibond
which synthetic absorbable sutures are monofilament (and which are multifilament, braided)?
PDS, Maxon, and Monocryl- are monofilament
Dexon and vicryl are multifilament, braided
state in increasing order the relative tensile strengths of non-absorbable sutures.
naturals (silk, linen, cotton)- least tensile strength polypropylene braided nylon polybutester monofilament nylon uncoated, braided polyester coated, braided polyester stainless steel - greatest tensile strength
state in increasing order the relative tissue reactivity of non-abosrbable sutures.
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
how are natural , absorbable sutures degraded? compare this to how synthetic, absorbable sutures are degraded.
nautral- degraded by lysosomes
synthetic- degraded by hydrolysis
which suture type is used when strong apposition of a tissue is needed (i.e. repairing tendon)?
polyester
