Evaluation of Safety of HEMOBLAST Bellows in Spine Surgery

Inclusion Criteria:

• Subject is undergoing open, elective, spine surgery
• Subject or an authorized legal representative is willing and able to give priorwritten informed consent for investigation participation
• Subject is 22 years of age or older
• Subject does not have an active or suspected infection at the surgical site
• Subject in whom the Investigator is able to identify a Target Bleeding Site (TBS) forwhich any applicable conventional means for hemostasis are ineffective or impractical
• Subject has a TBS with a Surface Bleeding Severity Scale (SBSS) score of 1, 2, or 3

Exclusion Criteria:

• Subject is undergoing an emergency surgical procedure
• Subject is undergoing a laparoscopic surgery
• Subject is undergoing a cervical spine surgery
• Subject is pregnant, planning on becoming pregnant during the follow-up period, oractively breast-feeding
• Subject has a platelet count < 100,000 per microliter or International NormalizedRatio > 1.5 within 4 weeks of surgery
• Subject receiving intravenous heparin within 12 hours before surgery or oral Coumadinwithin 2 days before surgery
• Subject receiving antiplatelet medications within 5 days prior to surgery
• Subject receiving aspirin within 7 days prior to surgery
• Subject has an active or suspected infection at the surgical site
• Subject has had or has planned to receive any organ transplantation
• Subject has a known sensitivity or allergy to bovine and/or porcine substance(s) orany other component(s) of the hemostatic agent
• Subject has a known sensitivity or allergy to Gadolinium
• The subject has a contra-indication for MRI or gadolinium contrast agent according toclinical guidelines, local regulations or manufacturer's recommendations
• Subject suffers from claustrophobia or fear of MRI, or has any contraindication to MRI (e.g., metal implants, spinal cord stimulator, etc. not suited to MRI)
• Subject has American Society of Anesthesiologists classification of > 4
• Subject has a life expectancy of less than 3 months
• Subject has a documented severe congenital or acquired immunodeficiency
• Subject has religious or other objections to porcine, bovine, or human components
• Subject is currently participating or has participated in another clinical trialwithin the past 30 days and is receiving/has received an investigational drug, device,or biologic agent
• Per investigator opinion subject is unable to fully cooperate with the study protocol.
• The product will be placed in at the site where the dura is open
• The product will be placed in the intradural or cranial space