Sutures by Nicho Flashcards
Synthetic absorbable suture material how does it degrade itself
non enzymatic hydrolysis of ester bond in 60 days and then depending on the size of phagocytosis
Multifilament properties for handling?
good
Multifilament properties for knot security?
good
Multifilament properties for capillarity?
increased capillarity
Drag resistance in multifilament suture is high or low?
increased drag resistance when pulled through tissue
Monofilament properties for handling?
Poorer handling higher memory and stiffness
Monofilament properties for knot security?
Poor
What is the risk of infection and reaction in monofilament?
Reduced risk of infection and tissue reaction
Monofilament properties for tissue drag?
Lower tissue drag and stif cut end can cause less tissue irritation
What is tensile strength?
The suture material’s tensile strength (TS) is the force that theuntied suture starnd can withstand before it breaks when the force is applied in the direction of its lenght
Reapsorbtion time for polyglyconate (monosyn + maxon)
60-90 days
Tensile strenght for polyglyconate?
Reduction 50% by 14 d
80% in 21 d
Reapsorbtion time for Glycomer 631 (Biosyn?)
90-110
Tensile strenght for Glycomer 631 (Biosyn)
*25% by 14 d
*60% by 21 d
Reapsorbtion time for polyeglecaprone (monocryl)
90-120 days
Tensile strenght for polyglecaprone
- 80% by 14 d
- 100% by 21 d
Reapsorbtion time for Polydioxanone (PDS)
180 days
Tensile strenght for polydioxanone (PDS)
*25% - 14 d
*30% at 28 d
*50% at 42 d
Reapsorbtion time for Polyglyconate (maxon)
180 d
Tensile strenght for polyglyconate (maxon)
*25% at 14 d
*50% at 28 d
*75% at 42 d
Name the tensile strenght from strongest to weakest
Polyglecaprone, polyglyconate, glycomer 631, polydiaxonone
Polydioxanone > glycomer 631 > polyglyconate > polyglecapron
is the polyglyconate stronger than polyglactin 910?
yes 3 times tronger
Reapsorbtion time for polygalctin 910 (Vicryl)
56-70 d
Tensile strenght for polyglactin 910?
*25% by 14 d
*50% by 21 d
*100% by 35d
Reapsorbtion time for braided lactomer (polysorb)?
56-70 d
Tensile strenght for braided lactomer (polysorb)?
*80% by 14 d
*30 d at 21 d
biomechanically superior to polyglactin 91
Needle taper point is indicated for which tissue?
muscle or viscera
Figure 16-2. Various points and shaft designs of surgical needles. (A) Taperpoint; (B) tapercut; (C) regular cutting; (D) reverse cutting; (E) spatula point; (F) blunt point.
Regular Cutting needle is indicated for which tissue?
skin tendon fascia
Taper cut is indicated for which tissue?
opthalmic
Tapercut
Blunt point is indicated for which tissue?
Blunt point is for parenchyma (kidney and liver)
Reapsorbtion time for polyglycolic acid (dexon, safil))?
60-90d
Tensile strenght for polyglycolic acid (dexon, safil)?
reduction by 35% at 14 d
*65% at 21 d
