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level: Level 2

Questions and Answers List

level questions: Level 2

Question	Answer
Source: a viscous orange-red aqueous solution of sodium cellulose xanthogenate obtained by dissolving wood pulp cellulose in sodium hydroxide soln and treating with carbon disulphide Use: to manufacture fabrics, surgical dressings, absorbent wool, enzyme and cellophane	VISCOSE RAYON Syn: viscose rayon, viscose, rayon, regenerated cellulose
1 Properties: Less absorbent than viscose rayon Unsuitable for surgical dressings Loses less strength when wet Use: component of plastic splinting bandage 2 Production: Cotton linters and delignified wood pulp -> __	1 CELLULOSE ACETATE 2 purified cellulose
Source: Laminaria hyperborea, other sp, Ascophyllum comes from cell walls of brown algae Production: are produced by a similar process to viscose rayon Uses absorbable haemostatic surgical dressings internal – neurosurgery external – burns, skin graft sites bacterial swabs	ALGINATES Alginic acid
Polyamides: NYLON Still remains an important plastic and not just for use in fabrics Wear-resistant, used in making gears, bearings and other mechanical parts Use: sutures	Synthetic fibers
Condensation polymer resin Can be autoclaved Use : sutures (prep of artificial grafts)	Polyesters : TERYLENE
Can be autoclaved Non-absorbable Use: catheters, sutures	Polypropylene
Sterile threads or strings specially prepared for use in surgery	Sutures & Ligatures
are used for sewing or stitching together tissues like skin, muscle or tendon by using Needle	Sutures
used to tie & constrict blood vessel vein or artery and no needle is used A type of tying	Ligatures
Absorbed & digested in the tissues of the body	Absorbable sutures
Absorbable sutures classification: __	1 Catgut 2 Collagen 3 Cargile membrane 4 Kangaroo tendon 5 Fascia lata (from thigh) CCCKF
is a type of cord prepared from the natural fibre found in the walls of animal intestines usually sheep or goat intestines, but occasionally of cattle, hogs, horses, mules, or donkeys.	Catgut shortcut for cattle gut
1 Made up of materials which resist enzymatic digestion, remain in the body to be removed after wound healing. 2 Examples	1 Non-absorbable suture material 2 Silk ,cotton, nylon, linen stainless steel metallic
Metallic wires of silver or stainless steel are used as surgical aid Wires are available as mono-filaments, twists and braids	Metallic Sutures