Sutures and Devices

Q) Tensile strength of monocryl lost in how many days?
A. Less than10 days.
B. 15- 20 days.
C. 30-45 days.
D. 45-60 days

Ans b  2 weeks

Bailey page 93

Monocryl has a low tissue reactivity, maintains high tensile strength, and has a half-life of 7 to 14 days.

At 1 week, its in vivo tensile strength is at 50–60% undyed (60–70% dyed), 20–30% undyed (30–40% dyed) at two weeks, and essentially completely hydrolyzed by 91–119 days


 

Q Vascular anastomosis, preferable suture material
A. Non-absorbable, elastic
B. Non-absorbable, non-elastic
C. Absorbable, elastic
D. Absorbable, non-elastic

Ans a, Non absorbable elastic

 


Q True about suturing technique in vascular anastomosis

a) Anastomosis may not be completely water tight

b) To prevent intimal injury needle should be moved from with in to out

c) 4-0 suture is preferred for aorta

d) Any bio degradable suture which is monofilament can be used

Answer

b

Vessels should always be sewn with the needle moving from within to without on the downstream edge of the vessel to avoid creating an intimal flap and to fix any atherosclerotic plaque.

Tip of the needle should be at right angle to the intima and curve of the needle should be followed

Distal clamp is released first

Non absorbable sutures should be used

2-0 should be used for aorta 4-0 for femoral and 6-0 for popliteal

Only non absorbable monofilament sutures are used in vascular anastomosis

Bailey 27 page 99

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Q) Lembert suture refers to:

a) Single layer suturing

b) seromuscular sutures

c) All coat intestinal suturing

d) skin suturing

Ans b


 

Q) PDS is absorbed within:

a) 7 days

b) 21 days

c) 100 days

d) 225 days

Ans d


Q) Surgically used suture material polydioxanone

a) is non-absorbable and remains encapsulated

b) undergoes hydrolysis and complete absorption

c) undergoes phagocytosis and enzymatic degradation

d) is specifically used for heart valves or synthetic grafts

      1. Ans(2)