Efficacy and Safety of Artacent™ for Treatment Resistant Lower Extremity Venous and Diabetic Ulcers

This study is to document the efficacy of Artacent™ Human Amniotic Membrane (Artacent) in the
treatment of diabetic and vascular lower extremity ulcers. The study will add to the
currently available literature by also assessing the impact of treatment on quality of life
and on heal economic outcomes. Finally the study will follow patients for longer than
previous studies and will obtain data on healing and recurrence at 6 months.

The objectives of this study are 1) to compare Artacent to standard of care (SOC) in the
treatment of non-healing lower extremity ulcers and 2) to evaluate the impact of treatment on
patient quality of life. Health economic outcomes will also be collected. The proportion of
patients receiving Artacent who have wound closure with 12 weeks will be compared to those
patients receiving SOC only will be compared. A comparison of time to wound closure will also
be compared between the two populations.

Patients who are randomized to the SOC group (control) and require further treatment at 12
weeks due to incomplete wound healing, may receive treatment with Artacent if the
investigator determines that to be a potentially beneficial option.

Inclusion Criteria:

- Age 18 years or older

- Able and willing to give consent and to comply with study

- Lower extremity ulcer between 1 and 25 cm2 point after the 4 week run-in period

- Has received documented SOC treatment for 4 weeks or greater duration resulting in
<50% reduction in the ulcer size

- No clinical signs of infection at the ulcer site

- Serum Creatinine below 3.0 mg/dl

- Serum HgA1c below 12%

- Adequate circulation to the affected limb with ABI between 0.7 and 1.2 or
tri-/bi-phasic arterial waveforms at the ankle of the affected leg.

Exclusion Criteria:

- Is participating in another wound study

- Has a Charcot foot

- Has previously received a different biological graft on the target foot

- Has more than one lower extremity ulcer

- Has an ulcer that probes to bone or involves tendon, muscle, joint capsule or has
sinus tracts

- Is currently receiving radiation or chemotherapy

- Has an autoimmune connective tissue disorder

- Is taking any medication known to be an immune system modulator

- Is pregnant or is considering becoming pregnant within the next 6 months