Immunogenicity and Safety Study of Topical Recombinant Thrombin in Surgical Hemostasis

• Number of Participants With Anti-recombinant Thrombin (rThrombin) Product Antibodies at Day 29 in Participants With and Without Anti-bovine Thrombin Product Antibodies at Baseline [ Time Frame: At Day 29 ] [ Designated as safety issue: Yes ]
  Seropositive=with specific anti-bovine thrombin product antibodies; seronegative=without specific anti-bovine thrombin product antibodies.
  
  

• Number of Participants With Death as Outcome, Serious Adverse Events, Treatment-related Adverse Events (AEs), and Treatment-emergent AEs [ Time Frame: Day 1 (surgery) to Day 29 (end of study), continuously ] [ Designated as safety issue: Yes ]
  AE=a new unfavorable symptom, sign, or disease or worsening of a preexisting condition that may or may not have a causal relationship with treatment. SAE=an unfavorable medical event that results in death, persistent or significant incapacity, or drug dependency or abuse; is life-threatening, or a congenital anomaly/birth defect; or requires or prolongs hospitalization. Treatment-related=possibly, probably, or certainly related to study drug. Treatment-emergent=onset on or after treatment start. Grade (Gr) 1=mild, Gr 2=moderate, Gr 3=severe, Gr 4=life threatening/disabling, Gr 5=death.
  
  
• Number of Participants With Abnormal Hematology Laboratory Results of Common Terminology Criteria (CTC) Grade 2 or Higher at Baseline and Day 29 [ Time Frame: Baseline and Day 29 (end of study) ] [ Designated as safety issue: Yes ]
  Hemoglobin, low (g/L): Grade 2=<100 Grade 3=<80; Grade 4=<65. Platelets, low: Grade 2=<75*10^9/L; Grade 3=<50*10^9/L; Grade 4=<25*10^9/L. Leukocytes, low: Grade 2=<3.0-2.0*10^9/L; Grade 3=<2.0-1.0*10^9/L; Grade 4=<1.0*10^9/L. Lymphocytes, low: Grade 2=<0.8*10^9/L; Grade 3=<0.5*10^9/L; Grade 4=<0.2*10^9/L. Neutrophils, low: Grade 2=<1.5*10^9/L; Grade 3=<1.0*10^9/L; Grade 4=<0.5*10^9/L. Changes in hematocrit values observed were not graded for severity.
  
  
• Number of Participants With Elevations in Coagulation Parameters of CTC Grade 3 or Higher at Baseline and Day 29 [ Time Frame: Baseline and Day 29 (end of study) ] [ Designated as safety issue: Yes ]
  Activated partial thromboplastin time (aPTT) elevations: Grade 3=>2*upper limit of normal (ULN). International normalized ratio(INR)elevations: Grade 3=>2*ULN. Changes in prothrombin time were not graded for toxicity. n=Number of participants with assessments available at that visit.
  
  
• Number of Participants With Abnormal Laboratory Results in Median Levels of Immunoglobulin A, G, and M at Baseline or Day 29 [ Time Frame: Baseline and Day 29 (end of study) ] [ Designated as safety issue: Yes ]
  Abnormal laboratory findings were recorded as AEs when the investigator considered them to be clinically significant (eg, an unusual result for the surgical population or for an individual participant) or when they were associated with symptoms or required treatment or a change in patient management.
  
  
• Number of Participants With Clinically Significant Changes in Mean Values for Vital Signs (Temperature, Systolic Blood Pressure, Diastolic Blood Pressure, Respiration Rate, Heart Rate) at Baseline and Day 29 [ Time Frame: Baseline and Day 29 (end of study) ] [ Designated as safety issue: Yes ]
  Laboratory findings considered clinically significant by investigator when associated with symptoms, required specific treatment, or required a change in participant management. Clinically significant changes in vital signs were reported as adverse events.
  
  

This is a Phase 3b, open-label, single-group, multisite safety and immunogenicity study of recombinant thrombin (rThrombin) in participants who are at least 18 years of age and undergoing spinal or vascular surgery. Eligible participants will receive topical rThrombin during surgery and complete a 1-month follow-up visit.