theatre - managment of instruments and materials Flashcards
when does absorbable suture material lose its tensile strength?
10-40 days
when is absorbable suture material totally absorbed?
40-180 Days
how is absorbable suture material absorbed?
natural absorbable suture material is removed by phagocytosis
sythetic absorbable suture material is removed by hydrolysis
how long does non- absorable suture material maintain tensile strength?
60 days
surgical catgut tensile strength, absorbable or non-absorbable, natural or synthetic and mono or multi filament?
7-10days.
absorbable
natural
can be either mono or multifilament
Polyglycolic acid - common name, absorbable or non-absorbable, natural or synthetic, mono or multi-filament and tensile strength?
Dexon absorbable synthetic multifilament 80% lost after 14 days
Polyglactin - common name, absorbable or non-absorbable, natural or synthetic, mono or multi-filament and tensile strength?
Vicryl, absorbable synthetic multifilament 50% lost after 14 days
polydioxanone - common name, absorbable or non-absorbable, natural or synthetic, mono or multi-filament and tensile strength?
PDS absorbable synthhetic mono-filament strength retained after 28 days
silk - mono or multi-filament, absorbable or non-absorbable, natural or synthetic and tensile strength?
multi-filament,
non absorbable
natural
30% lost after 14 days and 60 % lost after 30 days
polypropylene - common name, absorbable or non-absorbable, natural or synthetic, mono or multi-filament and tensile strength?
Proplene non ansorbable synthetic mono-filament high tensile strength but may stretch.
polyamide - common name, absorbable or non-absorbable, natural or synthetic, mono or multifilament and tensile strength?
ethilon and supramid non absorbable synthetic can be either high tensile strength
stainless steel - absorbable or non-absorbable, natural or synthetic, mono or multi-filament and tensile strength?
non absorbable
synthetic
can be either
high tensile strength
what should you do when selecting suture material size?
select the smallest size possible for each body part and size of the animal.
USP = what size metric? 5/0 =? 4/0=? 3/0=? 2/0=? 0=? 1=? 2=? 3=?
1 1.5 2 3 3.5 4 5 6
What suture material is best for skin?
Monofilament nylon or polypropylene. metal staples
Avoid material with capillary action
What suture material is best for subcutis?
fine synthetic absorbable with minimal tissue reaction.
polydioxanone, polyglactin or polyglycolic acid.
What suture material is best for muscle?
synthetic absorbable or non absorbable nylon
What suture material is best for fascia?
synthetic non absorbable if prolonged strength required
What suture material is best for hollow viscera ?
synthetic absorbable or polypropylene in bladder. monofilament synthetic
What suture material is best for tendon?
nylon, polypropylene, stainless steel
What suture material is best for blood vessels?
polyproylene, silk is the least thrombgenic.
What suture material is best for eyes?
synthetic absorbable. polyglactin, polydioxanone
What suture material is best for nerves?
nylon or polypropylene
difference between swagged on needles and eyed needles?
swagged are atraumatic as they are attached to the suture material. eyed needles need to be threaded. they are less expensive but but might cause increase tissue damage.
suggested uses for round bodied needles?
Delicate tissues - i.e fat, thin walled viscera.
suggested uses for cutting needles?
skin and other dense tissue.
suggested uses for reverse cutting needles?
skin and other dense tissues
suggested uses for taper cut needles?
dense tissues other than skin i.e fascia, thick walled viscera, mucous membranes.
which suture pattern brings the tissue together in direct apposition ?
Apposing
which suture pattern tends to turn the edges of a wound outwards?
everting
which suture pattern turn the tissues inwards?
inverting
what do you need to be careful of with basic knots?
them being too tight as they compromise the blood supply and cause irritation, enhance infection and delay healing.
What might staples be used for?
Skin closure, lung lobectomies, liver biopsies and bowel resection.
when are drains used?
Repeated lavage of a space
repeated aspiration of fluid (or air) from a space
prevention of accumulation of fluid in a space
what is the difference between passive drains and active drains?
passive rely on gravity and active have a suction apparatus on one end.
why might chest drains have a radiopaque marker down the side of them?
so that their position can be checked
how should swabs be disposed of?
Infectious clinical waste
How should suction bottle contents be disposed of?
abdorbent material and clinical waste
How should body tissue be disposed of?
Clinical waste
definition - breaking strength per unit of tissue.
Tensile strength
definition - every suture is weakest where it is tied. Often the strongest material has the poorest knot security
knot security
definition - response of the tissue to the suture material
tissue reactions
definition - degree of the fictional force developed as the material is pulled through the tissue.
tissue drag
definition - attraction of the fluid along the length of the material
capillary
definition - tendency of the material to return to its original shape.
Memory
definition - lack of smoothness as the throw is tightened down.
chatter