suture material & needles Flashcards
minimum of how many throws to tie a knot
2
suture removal time- ideal
7-14 days. shoot for 10
3 major classes of suture material
absorbable vs nonabsorbable
monofilament vs multifilament
synthetic vs natural
which class: can be manufactured from animal and synthetic sources, digested by body during normal healing
absorbable
the two types of surgical gut
plain- absorbed 3-5 days
chromic- absorbed 10-15 days
which type of catgut decreases soft tissue reaction
chromic. treated with chromic acid salts to prolong absorption time
produced from sub mucosal layers of sheep/hog intestines. elastic and easy to handle
catgut
polyglycolic acid is synthetic material made from what acid … lasts..
hydroxyacetic acid. lasts 14-21 days
polyglactin 910 is made from what 2 acids.. lasts
lactic and glycolic acids. 14-21 days
dexon and vicryl degrade quickly in.. and faster in
alkaline environment. dissolves faster in infected urine
made from glycoside and lactide copolymers
polysorb
polysorb is what kind of filament… and has a potential for bacterial wicking due to what
multifilament.. braided characteristics
polydioxanone/ polyglyconate are used in practice for
dog spays and neuters
“PDS2” is better for what type of wounds.. lasts
slow healing wounds, takes 180 days for absorption
how many throws does PDS2 require
4-6. (multiple)
poligecaprone & glycomer 631 used more commonly in replacement of.. lasts.. filament
catgut. 7-14 days. monofilament
what is used for cat spays
monocryl
how long do non-absorbable sutures keep its strength
60 days
if non-absorbable sutures are left in the skin..
they can become encysted
when should non-absorbable sutures be taken out
7-14 days by vet tech
what forms when there is dead space that fills with fluid
seroma
what suture can serve as a point of origin for infection and can induce a severe soft tissue reaction
silk
silk is commonly used in humans for what
cardiovascular surgery
cotton and linen increase slightly in strength when
wet
polyamide does not cause
tissue reaction
what suture has significant memory
polyamide
which suture is elastic and used to repair ligaments and structures underweighted motion
polybutester
polyester fibers requires how many throws for knot security.. complications?
5-6. chronic infection, draining fistulae are common
some polyester fibers have what kind of coating to help reduce tissue drag and reaction
teflon and silicone coating
suture that should never be used below skin level. synthetic fibers coated with plastic like material
polymerized caprolactum
why shouldnt polymerized caprolactum be used below skin level
predispose a patient to fistulas and infection
what suture is available in multi/monofilament
wire
which suture does not support bacterial growth
wire
disadvantages of using wire
poor handling, kinks, sharp cut ends can damage tissue.
what suture to use for bone repair
larger size of wire
wire is useful in..
infected wounds/ slow healing process/ active pt/ hx of chewing sutures
what size string is ordinary?
5
8 vs 10-0
8 is the biggest. 10-0 is the smallest.
what size string would you use for dentistry/ eye sx
dentistry- 4-0
eye sx- 6-0
small dog/cat string
medium/large dog
small-3-0
medium- 2-0
large-0
how do needles vary
size, shape, point design, method of attachment
which needle won’t unthread itself, is always sharp, readily available, less bulk through hole. suture material attached
swaged/ swedged
cons of swaged
more expensive, not reusable (we do)
a number may be used after the name of staple to indicate
the length of the row of staples
surgical skin stapler is used for.. reuse?
skin and fascia closure. reuse.
can you reuse GI staplers
no. used for GI resection and anastomosis
stapler used in lung resection
thoracoabdominal stapler
stapler used for blood vessel ligation
ligate- and-divide stapler
needle used to retain a prolapsed vagina in large animal
buhner needle
s curve needle is used for
large animal. don’t pivot wrist.
what size curved needle is most popular in general sx
3/8 and 1/2 circle
what needle uses needle holders to drive through tissue
curved
what types of needles pushes tissue apart instead of cutting.
non-cutting
what are non-cutting needles used for
soft tissue, internal tissue and SQ
which needle is recommended for suturing liver and kidneys
taper needle
what needle dissects through friable tissue without cutting it
tapered
dont use this needle when an airtight or water tight suture line is required
cutting
cutting needle is used for what
skin and tougher tissue
what needle is most preferred by surgeon
reverse cutting
everting turns the tissue
outward away from pt and towards surgeon
inverting turns the tissue
toward the lumen of a hollow viscous organ
apposing are designed to bring
tissues in direct apposition
