Hemostasis Flashcards
How do we control low pressure bleeding from small vessels?
Applying pressure
Pressure as a form of hemostasis relies on?
Pressure long enough to form an effective clot
Is pressure a permanent fix on larger vessels?
No temporary
How do hemostatic forceps stop hemorrhage
Crushes vessels arresting hemorrhage and damaging vessel wall activating clotting factors
How do you orient the hemostats to clamp off small and large vessels?
Small point the tip towards the vessel
Large apply with convex surface facing end of the vessel
Are vascular clips and ligatures secure?
The most secure
What is the major disadvantage of clips and ligatures
foreign material being left int he body
2 advantages and one disadvantage to vascular clips
Rapid placement
good for poorly accessible locations
More likely to be dislodged during manipulation
Big strengths ligatures have
Multiple vessels and pedicles
increased security on even the largest of vessels
Big disadvantage of ligatures
Awkward and time consuming
If you are worried about slippage you should use what ligature?
Transfixation
Knot security decreases as suture size _______
increases
Cautery works well for arteries and veins of what size?
Arteries 1mm
veins 2mm
3 types of cautery
monopolar
bipolar
ligasure
Describe monopolar cautery use
Coagulates and cuts
apply directly to vessel or indirectly onto forceps
only use on dry tissue
only contact at point of coagulation to avoid tissue damage
bipolar cautery requires?
electrolyte fluid to conduct
Does bipolar or monopolar use more current
monopolarI
Improper use of cautery leads to?
Hemorrhage
burns
dalayed healing
Ligasure is a?
Bipolar vessel sealing device, adjusts its own current to seal vessels
Ligasure can be use don vessels how large?
7mm in diameer
2 good examples of places topical hemostatic agents can be used?
Cancellous bone oozing
liver biopsy hemorrhage
Before using topical hemostatic agents need to be sure that the wound is?
Very clean, the foam persists for years.
