Ligatures Flashcards
What is a ligature?
Suture is used to “tie off” or ligate an anatomical structure to aid in hemostasis
What are examples of times to use a ligature?
- Ovarian pedicle (spay)
– Testicular pedicle (neuter)
– Ligation of blood vessels
What is ligature failure proportional to?
- Ligature failing is proportional to the volume of the tissue it encloses
What do you do first tie off the vessel/ pedicle or transect the vessel/ pedicle?
Tie off first
What is a circumferential ligature? Where are they usually placed?
Suture is wrapped around vessel/pedicle and
secured by tying a knot
– Placed proximally on pedicle
* Proximal = closest to body
– Often performed in the ”crush” of a clamp
What are applications of circumferential ligatures?
Applications:
– Vascular hemostasis
– Ligation of ovarian or testicular pedicle
How to preform a circumferential ligature?
- Pass the free end of the suture around the vessel or pedicle
- Tie a square or surgeons knot followed by additional secure throws
What is a transfixing ligature? Where are they placed?
What are the applications of a transfixing ligature?
How do you preform a transfixing ligature?
Which one of these is my transfixing ligature?
A
Which one of these is my circumferential ligature?
B
What are examples of friction knots?
Millers knot
Modified millers knot
Which knots have greater knot security, millers/ modified millers or circumferential/ transfixing?
Millers/ Modified millers
When are friction knots the most useful?
How do you preform a millers knot?
How do you preform a modified millers knot?
What is “Crush” referring to?
What is “ flashing” referring to?
