EXAM 1: Lecture 10 - suture material and patterns LA Flashcards
what questions should you ask when choosing suture material
how long does it need to last? inside or outside the body? inflammatory response? any wound contamination?
what are the typical suture sizes used in LA
2-0 for SQ and 2 or 3 for linea alba
T/F: internal organs/SQ heal slow compared to fascia
false! The opposite
what does skin healing depend on
quality of apposition
how long does it take for skin to seal
seals within 1 day
how long does it take the primary incision to heal
10-14 days
how long does it take skin to get back to full strength
<30 days
____ suture size = _____ volume of knot
increased suture size = increased volume of knot
____ volume of knots = _____ inflammation
increased volume = increased inflammation
___ inflammation = ___ closure
increased inflammation = weaken closure
what needle size is the most common
3/8 or 1/2 circle
when do you use 1/4 circle needle
used in ophthalmologic sx
when do you use 5/8 circle needle
confined or deep locations
what is a taper point needle and when do you use
round needle shaft does not enlarge hole as it passes thru and delicate tissue
what is a reverse cutting needle and when is it used
cutting edge on convex/outer side to make it stronger than conventional cutting
used in skin or fibrous tissue
when is a buhner needle used
to purse string prolapses
what is this
buhner needle
what is an S needle
used to close cow skin, negates need for needle drivers, and is easier to punch thru skin
where is the weakest point in your suture pattern
where the knot is!
if you have a larger suture like #2 or #3 vicryl, how many throws do you need
5 throws
_____ knot security with ______ suture size
decreased knot security with increased suture size
why is monofilament good for skin
has decreased bacterial transport into deeper tissues
what is the commonly used suture pattern and with what suture for skin
simple interrupted with no tension and 2-0 suture
how far away are your bites for fascia in LA
15mm away from cut edge
how far away are your bites from skin edge in LA
5mm
what suture and size do you use to close fascia in equine
polyglactin 910 or polydioxanone in sizes #2-7 (2 or 3 is most common)
what type of suture is commonly used to close fascia in cattle
catgut!!
what type and size of suture do you use for SQ or GI organs in LA
PDS, Vicryl, Monocryl in a 2-0
what type of suture do you use for contaminated wounds
monofilament ONLY!!!
what suture can you use for farm animals to reduce cost
chromic cat gut, supramid (braided nylon) or braunamid (braided polyamide)
what are the benefits of skin staplers and when should you use them
fast to put in but use in wounds with no tension
when should you NOT use skin staples in LA
not for minis that colic or foals
what are the inverting suture patterns used in LA
utrecht, cushing, or lembert
when is utrecht used
commonly on the uterus
what type of suture pattern is this
utrecht
when is cushing pattern used
GI, urinary bladder and combined with simple continuous
when is lembert suture pattern used
GI or urinary bladder
what is important to remember when suturing wounds with tension
tension impedes healing by impairing blood supply and prevent perfect apposition
what does langers lines mean and why do they matter
relaxed skin tension lines
incision being parallel to them = least tension
what is preferable when suturing wounds with tension
use limb immobilization, add more sutures, use tension relieving techniques
what are relief incision
when you close the primary wound and add small incisions near it to relieve tension
what are walking sutures
when you use suture to pull skin over top of defect to even out tension and get rid of deadspace
what is near-far-far-near suture pattern
excellent apposition and tension relief and interrupted only
what is different from LA and SA suturing
LA skin is MUCH thicker and there is more tension on skin sutures
LA usually uses surgeons throws
PDSII is not preferred to close linea alba
Rarely use intradermal patterns
