Suture Flashcards
What is knot security related to?
The coefficient of friction of the suture
What does knot security represent?
The force required for the knot to slip
What is the weakest point in a suture line?
The knot
What is the knot pull-out strength?
The load required to break a suture deformed by a knot
What percentage of strength does a polyester suture have?
51%
What percentage of strength does stainless steel have?
92%
What percentage of strength does synthetic absorbable suture have?
67%
What is the typical loss of strength caused by knot placement?
10% to 40%
Fill in the blank: The weakest point in a suture line is the _______.
knot
True or False: Knot security is not affected by the coefficient of friction.
False
True or False: Deformation caused by knot placement generally results in a strength gain.
False
What is the tensile strength retention of Polyglactin 910 (Vicryl) at 2 to 3 weeks?
~ 50%
Absorbs in 56-70 days
How long does it take for Poliglecaprone 25 (monocryl) to reach 50% of its strength?
1 week
70% to 80% strength at 2 weeks; completely absorbed in 90 to 120 days
What is the tensile strength retention of Caprosyn and Gut at 2-3 weeks?
0%
Indicates complete absorption or loss of strength
At what time frame does Monocryl reduce to 70-80% of its strength?
2 weeks
What is the tensile strength retention of BVD (Biosyn, Vicryl, Dexon) at 2-3 weeks?
50%
How long does Maxon retain 50% of its tensile strength?
4-5 weeks
At what time frame does PDS retain 50% of its strength?
5-6 weeks
Fill in the blank: Poliglecaprone 25 (Monocryl) is completely absorbed in ____ .
90 to 120 days
Fill in the blank: Poliglecaprone 25 (Monocryl) is absorbed at 70 - 80 % in ____ .
2 weeks
True or False: Standard cutting (conventional cutting) needle can create a large hole and increases risk suture pull-through compared to a reverse cutting needle.
True
Reverse cutting have there cutting surface at the convex surface, making
Which has more poteintal to create tissue trauma, swaged or nonswaged?
swaged
True or False: PDS suture has a high rate of degradation in acidic environment.
True
Most sutures need 4-6 knot throws except?
- Vircyl
- Monofilament Nylon
- Polypropylene
- Caprosyn
Which all need 3-6 throws
What is a characteristic feature of barbed sutures regarding tensile forces?
Have very even distribution of tensile forces throughout the closure instead of focal areas of high tension associated with suture knots
This feature helps to minimize the risk of complications related to knot placement.
In tendon repair applications, how does barbed suture perform compared to smooth knotted suture?
Significantly underperforms smooth knotted suture in both ultimate tensile strength and gap formation
This indicates that smooth knotted sutures are generally preferred for tendon repairs.
Looking at breaking strength what smooth polypropylene suture size compares to 2-0 barbed polypropylene suture?
Smooth 3-0 polypropylene suture
True or False: Compared with plain catgut, chromic catgut undergoes additional curing or tanning processes with chromium trioxide salts, which increases collagen cross-linkages.
True
What advantages does plain catgut vs chromic catgut?
- Delays suture absorption
- Reduces tissue inflammation
____ -action rongeurs have a greater mechanical advantage and require less force compared to ____ action rongeurs.
Double-action
Single-action
What instrument is A nd B?
A: Stille-Luer and
B: Ruskin Double-action
A. Top picture
B. Bottom picture
A. BoLempert - Finer, delicate jaws
B. Kerrison - Single cutting blade and a footplate
What is the beveling difference between a chisel and an osteotome?
Chisel is beveled on one side, while osteotome is double beveled
What tools are used to reshape or cut bone?
- Gouges
- Manual saws (hobby saw or gigli wire)
These tools are essential for various surgical procedures involving bone.
What is a curette used for?
Curettes are used for scraping tissue or debris
They are commonly used in surgical and dental procedures.
What is the purpose of trephines?
Bone biopsy (bx)
Trephines are cylindrical instruments used to remove a core of bone for examination.
What is the difference between traumatic and atraumatic forceps?
Traumatic forceps crush tissue, while atraumatic forceps do not crush tissue.
Name some crushing forceps?
A. Right angle forceps
B. Babcock
C. Allis tissue
D. Oschsner-kocher - larger intermeshing teeth at the tip eds
What are Doyen forceps characterized by?
Longitudinal grooves.
Name a type of peripheral vascular clamp.
DeBakey forceps.
What are Cooley forceps used for?
Partial occlusion of vessels.
Fill in the blank: __________ forceps are designed to minimize tissue damage.
Atraumatic
What is the primary use of Satinsky forceps?
Partial occlusion.
C. Satinsky
