Clinical Trial Comparing Standard Wound Closure Techniques Versus TissuGlu® Surgical Adhesive

The Cohera TissuGlu® study is a pivotal, prospective clinical investigation for a
randomized, controlled, multicenter non-inferiority study comparing standard wound closure
technique with drains (control) to standard wound closure techniques plus TissuGlu® and no
drains (test) during abdominoplasty. TissuGlu® will be applied to the test group prior to
standard closure of the abdominal flap thereby eliminating the deadspace between the fascia
and the flap. No closed suction drains will be inserted in the test group. The control
group will receive closed suction drains per the standard of care. It is hypothesized that
the elimination of deadspace in the wound in the test group will prevent post-surgical fluid
from developing and causing seroma and that the number of invasive treatments related to
aspirations in the test group will not be inferior to the management and removal of drains
and aspirations for seroma in the control group. The study will be conducted with 130
patients (65 test, 65 control) at up to 5 sites.

Inclusion Criteria:

- Male or female, ≥ 18 years of age

- Provide signed and dated informed consent form

- Willing to comply with all study procedures, schedules and be available for the
follow-up evaluations for the duration of the study

- Willing to follow instructions for incision and drain care, and follow guidelines
related to resumption of daily activities

- Agree not to schedule any additional elective surgical procedures that involve an
incision until their participation in the study is complete

- In good general health in the opinion of the Investigator with no conditions that
would significantly impact wound healing as determined by medical history, and review
of recent concomitant medications

- Requiring at least one full thickness surgical incision of at least 20cm in length as
part of elective abdominoplasty

- ≤ ASA2 - American Society of Anesthesiologists Physical Classification System
(2=subject with mild systemic disease)

- Have a Body Mass Index (BMI) ≤ 28

Exclusion Criteria:

- Pregnancy or lactation

- Previous abdominoplasty

- Prior bariatric or weight loss surgery

- Lost ≥ 15% of maximum lifetime bodyweight (excluding pregnancy weight gain)

- Known medical condition that results in compromised blood supply to tissues

- Have known or suspected allergy or sensitivity to any test materials or reagents

- Have severe co-morbid conditions (e.g., heart disease)

- Are currently a smoker or have smoked within 30 days of prescreening as determined by
nicotine test

- Any condition known to effect wound healing, such as collagen vascular disease

- Be known to have a blood clotting disorder and/or be willing to discontinue
anti-coagulation therapy including aspirin

- Diagnosis of diabetes with current medical treatment

- Receiving antibiotic therapy for pre-existing condition or infection

- Have known personal or family history of keloid formation or hypertrophic scarring

- Currently taking systemic steroids or immunosuppressive agents

- Undergoing concurrent adjacent or congruent Liposuction agents

- Use of pain pumps after the abdominoplasty procedure

- Concurrent use of fibrin sealants or other internal wound care devices

- Concurrent hernia repair greater than 6 cm and/or requiring the use of mesh

- Mini abdominoplasty (abdominoplasty without umbilical transposition)

- Be participating in any current clinical trial or have participated in any clinical
trial within 30 days of enrollment in this study