Purpose

Study Type: A multi-site, parallel group, randomized trial. Study Objectives: The objective is to evaluate safety and determine preliminary efficacy of VT-X7. Efficacy is evaluated as superiority of the Experimental Arm in a composite endpoint of Overall Success at 90 days, consisting of a revision prosthesis implanted at Stage 2, patient survival, absence of reoperation and absence of PJI. Secondary objectives are to evaluate superiority at 365 days in a composite endpoint of Overall Success, and in separate secondary endpoints for quality of life (QoL) and patient survival. The exploratory objective is to compare Experimental and Control Arms in exploratory endpoints. Follow-up: Patients will be evaluated at 90-, 180-, and 365-day follow-up visits.

Condition

Eligibility

Eligible Ages
Between 22 Years and 84 Years
Eligible Genders
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  • Scheduled for two-stage exchange arthroplasty due to hip or knee PJI - Signed informed consent - 22 to 84 years of age (inclusive) - Medical clearance for surgery - Preoperative diagnosis of PJI of the hip or knee per the International Consensus Meeting of Musculoskeletal Infection (ICMMI) 2018 definition of Periprosthetic Hip and Knee Infection

Exclusion Criteria

  • Patients with 2 or more prior one-stage or two-stage exchange arthroplasties of the infected joint; - Patients with acute PJI, defined as total joint arthroplasty surgery within 4 weeks prior to enrollment (Stage 1) in this study; - Patients with bacteremia or positive bacterial blood culture in the last 30 days; - Patients with concurrent PJI of more than one joint; - Patients with ongoing active infection of an intravenous (IV) site; - Patients who require long-term anticoagulation or antiplatelet therapy, and for whom bridging or withholding therapy is not recommended based on the individual's clinical condition; - Patients with advanced renal insufficiency (chronic kidney disease (CKD) Stage 4 or greater or glomerular filtration rate (GFR) <30 mL/min); - Patients on chemotherapy for malignant disease; - Patients on systemic glucocorticoid therapy (prednisone >10 mg/day or equivalent); - Patients with immunodeficiency (e.g., splenectomy, sickle cell anemia, Stage 3 human immunodeficiency virus (HIV) infection, primary immunodeficiency disease, except immunodeficiency due to immunosuppressive therapy. - Patients who have an allergy to vancomycin HCl or tobramycin sulfate (Note: prior history of red man syndrome is not considered an allergy); - Patients who have an allergy to titanium, titanium alloys, polymethylmethacrylate or polyurethane. - Patients who are pregnant or planning to become pregnant in the next 12 months; - Patients in whom NPWT is contraindicated; - Patients with a fungal PJI; - Patients who have a skeletal defect greater than 150 mm in length in the tibia or femur of the infected joint; - Patients who have a planned surgical procedure within 6 months of enrollment that can impact the conduct of the study; - Patients who are breastfeeding at the screening visit; - Patients who are incarcerated or are facing impending incarceration; - Patients who have been in treatment or referred for treatment for substance abuse within the past year; - Patients with any medical condition, including schizophrenia or another psychiatric disorder with hallucinations and/or delusions, that would interfere with the interpretation of the study results, the conduct of the study, or patient participation would not be in the best interest of the patient in the opinion of the Study Site PI; - Patients who will participate in another clinical study of an investigational drug or investigational device or have participated in another clinical study of an investigational drug or investigational device within the past 30 days that would interfere with the interpretation of the study results or conduct of the study; - Patients who are judged by the Investigator to be unsuitable for the study. - Patients receiving immunosuppressive drug therapy for bone marrow or another transplant; - Patients currently or previously enrolled in this study; - Patients who receive therapy including any of the following biologic agents, which will not be withheld for a period beginning at least one dosing cycle (minimum 7 days) prior to Stage 1 surgery and ending at least 14 days following Stage 2 surgery: Adalimumab (Humira) Tocilizumab (Actemra) Etenercept (Enbrel) Anakinra (Kineret) Golimumab (Simponi) Secukinimab (Cosentyx) Infliximab (Remicade) Ustekinumab (Stelara) Abatacept (Orencia) Rituximab (Rituxan) Certolizumab (Cimzia) Tofacitinib (Xeljanz) Belimumab (Benlysta)

Study Design

Phase
Phase 2
Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel Assignment
Primary Purpose
Treatment
Masking
Single (Participant)
Masking Description
Patients will be blinded to their randomization arm assignment until the completion of Stage 1 surgery.

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
Experimental
Local antibiotic irrigation via the VT-X7 Treatment System adjuvant to two-stage exchange arthroplasty per SOC.
  • Combination Product: VT-X7 Treatment System
    Seven-day local antibiotic irrigation (alternating tobramycin sulfate and vancomycin HCl) via the VT-X7 Knee or Hip Spacer with alternating NPWT.
  • Procedure: Two-stage exchange arthroplasty
    Stage 1 consists of surgical removal of the infected prosthesis, debridement, and implantation of a temporary spacer. Stage 2 surgery consists of explantation of the temporary spacer, debridement, and implantation of a permanent prosthesis, followed by systemic administration of postoperative antibiotics for 42 days (inclusive) to 90 days (inclusive).
Active Comparator
Control
SOC for treatment of chronic PJI - two-stage exchange arthroplasty: surgical removal of the infected implant, aggressive debridement, and exchange arthroplasty with administration of adjuvant systemic antibiotics and temporary antibiotic-impregnated cement spacer.
  • Drug: SOC
    Forty-two days (minimum) systemic antibiotic administration adjuvant to two-stage exchange arthroplasty with temporary antibiotic-impregnated cement spacer per SOC. Antibiotics will be selected by treatment provider and administered in accordance with national and local treatment guidelines.
  • Procedure: Two-stage exchange arthroplasty
    Stage 1 consists of surgical removal of the infected prosthesis, debridement, and implantation of a temporary spacer. Stage 2 surgery consists of explantation of the temporary spacer, debridement, and implantation of a permanent prosthesis, followed by systemic administration of postoperative antibiotics for 42 days (inclusive) to 90 days (inclusive).

Recruiting Locations

VA Medical Center
Washington, District of Columbia 20422
Contact:
Katharine Harper, MD
Katharine.Harper@va.gov

More Details

Status
Recruiting
Sponsor
Osteal Therapeutics, Inc.

Study Contact

Branko Kopjar, M.D., PhD
206-607-6861
jps301@nor-consult.com

Notice

Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.