hemostasis Flashcards
what are the 5 methods of surgical hemostasis
- digital pressure
- hemostatic forceps
- ligation
- topical agents
- energy-based methods
what are the 2 types of vascular pedicle ligation hemostasis techniques
3-clamp technique
modified 3-clamp technique (2-clamp)
what knot is defined by one throw; incomplete
simple
what knot is define by two throws; opposite direction; complete
square knot
what knot is defined by two throws; same direction
granny knot
what knot is defined by first throw is a double throw (two passes)
surgeon’s knot
when would you use a surgeons knot? when would you NOT?
use in areas of high tension, friction knot
do NOT use for vascular ligation
when would a slip square knot be purposeful?
managing tension
in a cavity
where is a buried knot placed?
SQ tissue
what are the pros of an Aberdeen knot?
alternative to square knot at the end of a continuous line
self-locking
smaller knot volume
good knot security
Forwarder Knot
pros:
cons:
pros: more secure for continuous lines with larger suture (equine surgery)
cons: challenging, more material
what knot’s are good for vascular ligation
simple, encircling, circumferential ligatures
transfixation knot (figure-8)
double-loop knots…
1. millers
2. modified millers
3. strangle
4. constrictor
what ligature anchors the suture within the vessel wall/pedicle, two simple throws, wraps all the way around the vessel and four simple throws, knots side by side
transfixation ligature
good for large vascular bundles and arterial supply
what is the weakest point of the suture
knot
topical agents used for hemostasis
bone wax
gelatin/cellulose sponges
microfibrillar collagen
