10: Biomaterials - Smith Flashcards Preview

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Flashcards in 10: Biomaterials - Smith Deck (20)
1

define biomaterials

those products that are brought into contact with body tissues

2

4 reasons why biomaterials ***

- compatible
- facilitate surgery
- minimize complications
- improve results

3

injectable silicone

- soft tissue replacement
- uses: heloma, tyloma, neurotrophic ulcers
(-) migration

4

injectable collagen

- matrix for fibroblasts and vascular ingrowth
- uses: diabetic foot ulcers
(-) expensive, short acting

5

silastic sheeting

- prevents scarring and adhesions
- uses: tendon repair (prevents scarring down to sheath)

6

bovine collagen bioprosthesis

- tendon graft
- "hunter tendon graft" silicone
- xenograft
- uses: stabilization procedures and tendon repairs

7

polyolefins

- polyethylene and polypropylene
- uses: STA-Pef/STJ arthroereisis
(-) creeping and damage

8

hydroxyalpatite

- coral
- acts as a trellis for osseous ingrowth
- uses: bone grafts

9

dacron and fortex mesh grafts

synthetic fiber used to prevent adhesions, surgical repair of ruptured tendons and ligaments, entubulation and vascular grafts

10

acrylic polymers

- polymethylmethacrylate PMMA
- exothermic rxn
- used as bone cement for implants and PMMA beads

11

silastic gel sheeting

- reduces or softens hypertrophic scars
- gel sheets placed on scar
- not to be used on open wounds

12

name 6 hemostatic agents (things used to control bleeding)

topical thrombin
absorbable gelatin sponge
microfibrillar collagen
oxygen-regenerated cellulose
bone wax
drains

13

describe topical thrombin

- thrombostat
- bovine prtn which clots the fibrinogen of blood
- applied, not injected
- patient sensitivity

14

absorbable gelatin sponge

- gelfoam
- purified animal prtn
- liquefies in 2-5 d, absorbed in 4-6 wks
- used for tx of ulcers

15

microfibrillar collagen

- avitene
- adheres to blood soaked surfaces and attracts platelets
- does not interfere with bone healing, but causes an inflammatory response
- there is also an autologous platelet gel

16

oxygen-regenerated cellulose

- surgicel
- absorbable fabric
- hemostasis through absorption
- may inhibit bone healing

17

bone wax

- provides hemostasis through tamponade
- inhibits bone healing

18

"no drain, no brain"

i wonder if we should put a drain in... YES

(+) evacuate fluid, prevent hematoma, reduce pain, increase healing, help prevent infection

(-) possible infection, maintenance

19

TLS drain

tiny little sucker

20

when do you remove drain?

48 hrs after surgery or when blood no longer coming out

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