StrataGraft™ Skin Tissue (Human Donor Skin) In The Surgical Management Of Complex Skin Defects

Stratatech has completed a phase I/IIa clinical study to assess the safety and efficacy of
escalating amounts of StrataGraft skin tissue in patients with complex skin defects requiring
sequential debridement and temporary wound coverage with biological dressing prior to
autografting. The specific objectives of this phase I/IIa clinical trial were to assess the
safety of StrataGraft skin tissue using a predetermined panel of clinical and laboratory
endpoints and assess the efficacy of StrataGraft skin tissue by comparing the ability of
StrataGraft skin tissue to the standard of care, human cadaver skin, to condition complex
skin defects for subsequent autografting. In three cohorts of five patients each, the maximum
amount of StrataGraft skin tissue applied to excised full-thickness skin wounds was increased
sequentially from 0.5% to 1.0%, and then to 1.5% TBSA. Equivalent study wound areas on each
subject were treated with StrataGraft or cadaver allograft for one week, at which time the
allograft tissues were removed and the wound bed was evaluated. Infection and appearance of
the temporary allogeneic skin tissue were evaluated at every study session until autograft
placement. The wound was covered with split-thickness skin autografts when the wound was
judged ready to accept an autograft. Autograft take was assessed two weeks after autograft
placement.

Inclusion Criteria:

- Patients aged greater than 18 yrs.

- Patients with complex skin defects requiring sequential debridement under anesthesia
with temporary biological dressing (allogeneic grafting) prior to autografting

- Full-thickness skin defects

- Informed consent

Exclusion Criteria:

- Prisoners

- Pregnant (positive urinary pregnancy in women of child-bearing potential at Visit#1)
or lactating females

- Immunosuppressive therapy

- Infection with Human Immunodeficiency Virus

- Venous stasis ulcers of the lower leg

- Diabetic foot ulcers

- Donor site wounds

- Wounds of less than 5% body surface area

- Wounds of the hands, face, and feet (although such wound surface areas can be counted
toward total injured BSA)

- Prior entry into this study

- Expected survival of less than 3 months

- Concomitant processes sustained contemporaneously with the dermal injury (e.g.,
inhalational injury requiring ventilation, electrical injury with cardiac damage or
arrhythmia, sepsis, other serious or unstabilized organ damage from trauma, etc.)

- Use of an investigational agent within 30 days

- Active malignancy

- Clinical evidence of malnutrition

- Clinically significant renal, hepatic, cardiac, pulmonary, or neurological impairments