Suture resorption and tensile strength Flashcards
resorption time: 56-70 days
tensile strength reduction by 25% at day 14, 50% at day 21, and by 100% at day 35
Polyglactin 910 (Vicryl)
resorption time: 60-90 days
tensile strength reduction by 35% at day 14 and by 65% at day 21
Polyglycolic acid
dexon, dexon ii, Safil
resorption time: 56-70 days
tensile strength is 140% of minimum knot strength requirements of the european/ united States Pharmacopoeia initially, 80% at day 14 and 30% at day 21; biomechanically superior to polyglactin 910
Braided lactomer
Polysorb
evokes a moderate inflammatory reaction in tissue as it is broken down through a combination of enzymatic degradation and phagocytosis; rate of absorption is increased in the presence of infection and in tissues with high levels of proteolytic enzymes
Has less tensile strength than most synthetic absorbable sutures
Surgical gutCatgut, Plain Gut, Chromic Gut, Catgut Chrom
resorption time: 90-110 days
tensile strength is 75% of minimum knot strength requirements of the european/ united States Pharmacopoeia at day 14 and 40% at day 21.
Glycomer 631 (Biosyn)
resorption complete within 56 days
loses almost all tensile strength within 21 days
Polyglytone 6211
Caprosyn
resorption time: 180 days
tensile strength reduction by 25% at day 14, 30% at day 28, 50% at day 42
Polydioxanone (PDS II)
resorption time: 180 days
tensile strength reduction by 25% at day 14, 50% at day 28, 75% at day 42
Polyglyconate (Maxon)
resorption time: 60-90 days
tensile strength reduction by 30% at day 7, 50% at day 14 and 80% at 21 days
Polyglyconate (Monosyn)
resorption time: 90-120 days
tensile strength reduction by 50% at day 7 and 80% at day 14; complete loss of tensile strength within 21 days
Poliglecaprone (Monocryl)
Nonabsorbable;excellent handling characteristics; useful for ligatures.
does not maintain tensile strength more than 6 months; may potentiate infection— should be avoided in contaminated sites; has significant capillarity; incites some inflammatory reaction
Silk (Sofsilk, Silkam)
Nonabsorbable; Greatest tensile strength of all sutures
Greatest knot security of all sutures; no inflammatory reaction tissue.
movements against the inflexible ends may cause inflammation and necrosis; poor handling properties; cannot withstand repeated bending without breaking; multifilament wire can fragment and migrate, leading to sinus tract formation
Surgical steel (Steelex)
Nonabsorbable; intermediate tensile strength; monofilament nylon loses about 30% of its original tensile strength by 2 years because of chemical degradation; multifilament nylon retains no tensile strength after 6 months.
Suitable for use in contaminated wounds; degradation products act as antibacterial agents.
Poor handling characteristics and poor knot security; not recommended for use within serous or synovial cavities because buried sharp ends may cause frictional irritation
nylon (dafilon)
Nonabsorbable; Better tensile strength than nylon.
excellent handling properties, high knot security.
intermediate tissue reactivity; has a tendency to form sinuses on implantation in tissues and is therefore best suited for use in the skin
Polycaprolactam (Supramid)
Nonabsorbable; Very high and sustained tensile strength.
noncoated polyester fibers have a high coefficient of friction; knot security is poor and is further reduced by coating; causes marked tissue reaction and fibrous encapsulation; should not be used in contaminated wounds
Polyester (Mersilene, Synthofil, dagrofil, ethibond, ticron)
