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Section
3b. Tissue Engineered Wound Matrix
Products
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OASIS®
Wound Matrix [Healthpoint]
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OASIS®
Wound Matrix is made of a complex porcine derived
biological material (submucosa) found between the
mucosa and muscularis, in the wall of the porcine
small intestine.
The freeze dried acellular natural matrix
contains the natural collagen and matrix
structure, the bioactive matrix proteins found in
the human dermis which orchestrate healing. The
martix is biologically intact.
Preliminary data from clinical trials has
shown a more rapid re-epithelialization rate in both
acute partial thickness wounds and the harder to
heal venous ulcers.
The
wound matrix, when applied to a partial thickness
(burn or wound) or a full thickness wound debrided
to a viable wound base, improves the healing
environment.
The acellular matrix rapidly incorporates
migrating mesenchymal cells such as fibroblasts and
macrophages, forming a dermal like tissue.
The
OASIS ® Wound Matrix contains the
products produced by fibroblasts which were present
prior to freeze drying. These include the collagens,
glycosaminoglycans heparin, fibronectin, hyaluronic
acid and growth factors which remain active.
Healing
Environment
Moist
wound healing environment is maintained.
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Oasis
Wound Matrix (Submucosal
Layer)
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Components
of the OASIS MATRIX
-
Collagen
-
Glycosaminoglycans
-
Proteoglycans
-
Heparin
-
Fibronectin
-
Growth
Factors
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SIS
CHARACTERISTICS |
- Submucosal
layer of porcine small intestine which has
supported mucosal layer of intestine
- 0.125 -
0.25mm in thickness
- freeze
dried
- contains
no cells
- contains
dermal components like human dermis
- proteins
- carbohydrates
- lipids
- porous
- biocompatibles
- flexible
- good
tensile strength
- sterile
- non-immunogenic
- incorporates
into wound surface
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Indications: the OASIS ® matrix dressing is indicated for a
variety of acute and hard to heal wounds and burns.
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INDICATIONS |
- Partial thickness
skin loss
- Full
thickness skin loss
- Acute
traumatic wounds
-
vascular
ulcers
-
pressure
ulcers
-
diabetic
ulcers
-
partial
thickness
- full thickness
(debrided)
- split
thickness skin graft (STSG)
- donor
sites
- chronic wounds
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SIS
(Small Intestine Submucosa)
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Comparison
of Dermal Components
in
Human
Dermis & Oasis Wound Matrix |
|
Components |
Dermis |
Oasis |
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Type I
-
Type II
|
present |
present |
- Glycosaminoglycans
- Proteoglycans
- Hyaluronic
acid
- Dermatan
sulfate
- Fibronectin
-
Chondroitin
Sulfates
|
present |
present |
-
FGF
-
TGFB
-
VEGF
|
present |
present |
How
supplied:
Packaged
in sterile freeze dried sheets to be stored at room
temperature in a clean,
dry location.
| OASIS
APPLICATION PROTOCOL |
| Step
One:
Clean
and prepare the wound bed using standard
methods so the wound is free from debris and
necrotic tissue.
The wound may need surgical debridement
to ensure the wound edges are viable. |
| Step
Two:
Using
a clean technique cut the dry OASIS sheet to a
size that is just slightly larger than the
wound margins.
The sheet should be large enough to
cover all viable wound tissue and extend just
slightly beyond the wound margins. |
| Step
Three:
Position
the cut dry OASIS sheet on the wound surface
so that it overlaps all wound edges.
While holding OASIS in place, gently
pour sterile saline or Ringer’s solution
over OASIS to rehydrate.
OASIS may also be re-hydrated in a bowl
of sterile saline before it is placed on the
wound. |
| Step
Four:
If
the wound is larger than one sheet, use as
many OASIS sheets as needed to cover the
entire wound as well as slightly overlapping
the wound edges. |
| Step
Five:
Use
a non-adherent secondary dressing over OASIS
to keep the OASIS in place and to maintain a
moist environment.
Change the secondary dressing as
needed. Keep
OASIS moist but not too wet or macerated by
varying the choice of dressing based on the
top of wound and amount of exudates. DO NOT LET THE OASIS DRY OUT. |
| Step
Six:
After
each secondary dressing change, make sure
OASIS is covering the wound surface.
Place additional OASIS in areas not
properly covered. |
| Step
Seven:
Continue
to check the wound at least once a week and
place additional OASIS as needed until the
wound has completely epithelialized or is
closed by another means, e.g. graft flap.
Remove excess fluid buildup that can
cause the OASIS to float away from the wound
surface. |
| NOTE:
During
secondary dressing changes, a caramel colored
gel might be seen on the wound.
This is common and a result of OASIS
being combined with body fluids.
The gel should be rinsed away with
gentle irrigation.
Place additional OASIS to cover the
wound if needed.
Never forcibly remove OASIS from the
wound bed.
This could disturb budding epithelial
cells on the wound edge. |
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