Knot Security - Edubirdie

University:
The University Of Western Ontario
Course:
Biology 2290F | Scientific Method in Biology
Academic year:

2022
Views:

48

Pages:

2
Author:

Kyuwon J.

Knot security ● Mono filaments ○ prolene , Nylons, PDS, Monocryl ■ Smooth slippery ■ High memory ■ Needs more throw to make it secures ■ Exposed to risk of unraveling if the ending tails is too short ■ Lower tissue drag, higher chance of knot slippage ● Braidied ○ silk , Vicryl, Polysorb ■ Rougher surface = more frictions ■ Lesser throws are needed 3-4 throws ■ More tissue drag ● Must avoid tensions ■ Better handling - knot security ● Absorbable ○ Vicryl, PDS, Chromic gut ■ Knot security is crucial ■ Suture loses strength overtime due to degradations ■ Need enough throws for it to last while tissue heals Knots in different case ● Fascia closure ○ High tension area = multiple throws are needed ○ PDS, Prolene sutures are used ● Vessel ligations ○ Square knots used with silk ties ■ Has better and secure ligation, is compact ● Skin closure ○ Continuous sutures ○ Interrupted sutures ○ Knot must be buried under thee skin to reduce infection ○ If facial, must also account for cosmetics ■ Must be under if superficial ● Laparoscopy ○ Slip knot + extracorporeal knots ○ Needs intracorporeal knots if the opening is small ● Continuous suture ○ Aberdeen knot ○ Compact structure, lesser space to work with Significance ● Insufficient throw = knot failure = dehiscence ● Wrong knot type = unstable closure = infection possible ● Bulky knots = palpable, foreign body reactions ● Slippage in tension = vessel re-bleeding + wound separations Flat Opposite Secure = Safe Braided = Few Monofilament (smooth) = more

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