Suture Flashcards
What is the function of suture?
Hold tissue in apposition until wound healing progresses
What are the 4 properties of suture?
Tensile strength
Knot strength
Piability
Capillarity
What is tensile strength?
How strong suture is and ability to resist breakage
The larger the suture size the ____the tensile strength
Greater
What is the weakest point of the suture?
Knot
The larger the diameter of suture the____ secure the knot
Less
What are the length of suture tags?
3-5 mm internal
What is capilarity?
How much suture wicks/absorbs
What suture has high vs. low capilarity?
High: woven suture (vicryl)
Low: Monofilament steel
What type of tissue should vicryl not be used in?
Infected tissue
What is the difference of absorbable and non-absorbable suture?
Absorbable: suture that has lost most of tensile strength by 60 d
Non-absorbable: Retains tensile strength longer than 60 d
What is the MOA of absorbable suture?
Hydrolysis and enzymatic
What suture absorbs much faster in acidic environment vs. alkaline environment?
Acidic: PDS
Alkaline: monocryl
What is the function of coated suture?
Decreases tissue drag
What type of coatings has less knot security?
Water soluble coating
What type of needle is used for tension relieving sutures in skin?
Straight needle
What is the most common used needle in SAM?
Curved
What is the most commonly used suture attachment?
Swagged (threaded)
Which needle is used for the intestine, SC and bladder?
Taperpoint
What needle is used to dissect through friable tissue without cutting?
Blunt point
What needle has a cutting surface on the concave side?
Cutting
What needle has a cutting surface on the convex side and is typically used for skin?
Reverse cutting
What are the two types of synthetic absorbable braided suture?
Vicryl and Dexon
Monocryl, caprosyn, biosyn, PDS and maxon are examples of what?
Monofilament synthetic absorbable
What are some adverse effects of cat gut suture?
Highly inflammatory
Unpredictable enzymatic absorption
50% of this suture is absorbed at 6 months
PDS
What suture can only be used on skin?
Polymerized Caprolactam/Vetafil