Suture

Question 1

What is knot security related to?

Answer 1

The coefficient of friction of the suture

Question 2

What does knot security represent?

Answer 2

The force required for the knot to slip

Question 3

What is the weakest point in a suture line?

Answer 3

The knot

Question 4

What is the knot pull-out strength?

Answer 4

The load required to break a suture deformed by a knot

Question 5

What percentage of strength does a polyester suture have?

Answer 5

51%

Question 6

What percentage of strength does stainless steel have?

Answer 6

92%

Question 7

What percentage of strength does synthetic absorbable suture have?

Answer 7

67%

Question 8

What is the typical loss of strength caused by knot placement?

Answer 8

10% to 40%

Question 9

Fill in the blank: The weakest point in a suture line is the _______.

Answer 9

knot

Question 10

True or False: Knot security is not affected by the coefficient of friction.

Answer 10

False

Question 11

True or False: Deformation caused by knot placement generally results in a strength gain.

Answer 11

False

Question 12

What is the tensile strength retention of Polyglactin 910 (Vicryl) at 2 to 3 weeks?

Answer 12

~ 50%

Absorbs in 56-70 days

Question 13

How long does it take for Poliglecaprone 25 (monocryl) to reach 50% of its strength?

Answer 13

1 week

70% to 80% strength at 2 weeks; completely absorbed in 90 to 120 days

Question 14

What is the tensile strength retention of Caprosyn and Gut at 2-3 weeks?

Answer 14

0%

Indicates complete absorption or loss of strength

Question 15

At what time frame does Monocryl reduce to 70-80% of its strength?

Answer 15

2 weeks

Question 16

What is the tensile strength retention of BVD (Biosyn, Vicryl, Dexon) at 2-3 weeks?

Answer 16

50%

Question 17

How long does Maxon retain 50% of its tensile strength?

Answer 17

4-5 weeks

Question 18

At what time frame does PDS retain 50% of its strength?

Answer 18

5-6 weeks

Question 19

Fill in the blank: Poliglecaprone 25 (Monocryl) is completely absorbed in ____ .

Answer 19

90 to 120 days

Question 20

Fill in the blank: Poliglecaprone 25 (Monocryl) is absorbed at 70 - 80 % in ____ .

Answer 20

2 weeks

Question 21

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.

Answer 21

True

Reverse cutting have there cutting surface at the convex surface, making

Question 22

Which has more poteintal to create tissue trauma, swaged or nonswaged?

Answer 22

swaged

Question 23

True or False: PDS suture has a high rate of degradation in acidic environment.

Answer 23

True

Question 24

Most sutures need 4-6 knot throws except?

Answer 24

• Vircyl
• Monofilament Nylon
• Polypropylene
• Caprosyn

Which all need 3-6 throws

Question 25

What is a characteristic feature of barbed sutures regarding tensile forces?

Answer 25

Have very even distribution of tensile forces throughout the closure instead of focal areas of high tension associated with suture knots ## Footnote This feature helps to minimize the risk of complications related to knot placement.

Question 26

In tendon repair applications, how does barbed suture perform compared to smooth knotted suture?

Answer 26

Significantly underperforms smooth knotted suture in both ultimate tensile strength and gap formation ## Footnote This indicates that smooth knotted sutures are generally preferred for tendon repairs.

Question 27

Looking at breaking strength what smooth polypropylene suture size compares to 2-0 barbed polypropylene suture?

Answer 27

Smooth 3-0 polypropylene suture

Question 28

True or False: Compared with plain catgut, chromic catgut undergoes additional curing or tanning processes with chromium trioxide salts, which increases collagen cross-linkages.

Answer 28

True

Question 29

What advantages does plain catgut vs chromic catgut?

Answer 29

* Delays suture absorption * Reduces tissue inflammation

Question 30

____ -action rongeurs have a greater mechanical advantage and require less force compared to ____ action rongeurs.

Answer 30

Double-action Single-action

Question 31

What instrument is A nd B?

Answer 31

A: Stille-Luer and B: Ruskin Double-action

Question 32

A. Top picture B. Bottom picture

Answer 32

A. BoLempert - Finer, delicate jaws B. Kerrison - Single cutting blade and a footplate

Question 33

What is the beveling difference between a chisel and an osteotome?

Answer 33

Chisel is beveled on one side, while osteotome is double beveled

Question 34

What tools are used to reshape or cut bone?

Answer 34

* Gouges * Manual saws (hobby saw or gigli wire) ## Footnote These tools are essential for various surgical procedures involving bone.

Question 35

What is a curette used for?

Answer 35

Curettes are used for scraping tissue or debris ## Footnote They are commonly used in surgical and dental procedures.

Question 36

What is the purpose of trephines?

Answer 36

Bone biopsy (bx) ## Footnote Trephines are cylindrical instruments used to remove a core of bone for examination.

Question 37

What is the difference between traumatic and atraumatic forceps?

Answer 37

Traumatic forceps crush tissue, while atraumatic forceps do not crush tissue.

Question 38

Name some crushing forceps?

Answer 38

A. Right angle forceps B. Babcock C. Allis tissue D. Oschsner-kocher - larger intermeshing teeth at the tip eds

Question 39

What are Doyen forceps characterized by?

Answer 39

Longitudinal grooves.

Question 40

Name a type of peripheral vascular clamp.

Answer 40

DeBakey forceps.

Question 41

What are Cooley forceps used for?

Answer 41

Partial occlusion of vessels.

Question 42

Fill in the blank: __________ forceps are designed to minimize tissue damage.

Answer 42

Atraumatic

Question 43

What is the primary use of Satinsky forceps?

Answer 43

Partial occlusion. ## Footnote C. Satinsky