Prosthetic Joint Infection of KneeAMPLIFYNCT07700927
Sola2 AMF Knee System Added to Surgery and Antibiotics in Adults With Knee Implant Infection
A study testing Intervention 1: Alternating Magnetic Field Treatment and Debridement, Antibiotics, Implant Retention in people with Prosthetic Joint Infection of Knee, run by Solenic Medical, Inc..
Trial summary
The goal of this clinical trial is to learn whether the Sola2 AMF Knee System, when added to surgery and antibiotic treatment, can safely improve outcomes, knee function, and quality of life in adults with knee implant infection. The main questions this study aims to answer are: 1. Read more about this study
- Who is it for?
- Ages 22 years and older
- Conditions the study is for
- Prosthetic Joint Infection of Knee
- What is being tested?
- Intervention 1: Alternating Magnetic Field Treatment and Debridement, Antibiotics, Implant Retention
- Type of treatment
- Medical device, Surgery or procedure
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 165 participants
- Where
- No sites listed yet
- Study dates
- 18 Sep 2026to Aug 2029
- Phase
- Interventional
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 22 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Eligible participants must meet all of the following criteria:
- Adult male or female participant aged ≥ 22 years at the time of surgery.
- PJI diagnosis of "infected" knee per the 2018 MSIS Definition of Periprosthetic Hip and Knee Infection.
- Patient presents with PJI symptoms lasting for ≤ 45 days.
- Well-fixed and functioning prosthesis during clinical exam at screening.
- Patient to be treated with DAIR, polyethylene spacer exchange and pathogen- appropriate antibiotic therapy.
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- Implanted knee prosthesis must appear on the "AMPLIFY Implant List".
- All implanted knee prosthesis components must have a legible device identification label (implant sticker) available in the medical record.
- Able to comprehend and comply with postoperative instructions and willing to return for follow-up visits for the duration of the study.
- Consent to participate in study and sign the Informed Consent Form (ICF).
Who cannot join
- Participants meeting any of the following criteria will be excluded:
- Implanted knee prosthesis not appearing on the "AMPLIFY Implant List".
- Implanted knee prosthesis has any femoral and/or tibial augments, sleeves, cones, or modified/extended stems.
- Un-resurfaced patella.
- Metal-backed patellar components.
- Patients not indicated for a DAIR procedure pre-operatively.
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- Patients undergoing bilateral DAIR procedures during the same surgical session.
- Pre-operative determination that the surgical wound cannot be closed primarily and requires a wound vac as a method of wound closure (e.g., open wound managed for secondary intention healing or delayed primary closure); Use of closed-incision negative pressure therapy over a primarily closed incision is permitted.
- Previous DAIR procedure(s) performed on the affected knee joint within the last two years.
- Patients presenting with PJI symptoms lasting for >45 days.
- Patients on antibiotic therapy for an infection other than PJI of the knee.
- Body Mass Index (BMI) ≥ 45.
- Patients currently on bone-marrow suppressive chemotherapy for malignancy.
- Patients currently with active neutropenia.
- Presence of metallic implant(s), other than the femoral and tibial components, within the Sola2 treatment zone (+/- 20 centimeters from the knee joint line) including intramedullary nails, hip prosthesis femoral stem, or fracture fixation hardware.
- Patients with an upper-thigh circumference greater than 70 centimeters (cm) (28 inches (in), measured approximately 15 cm (6 in) proximal to the superior pole of the patella.
- Patients with implanted or nonremovable cardiac pacemakers, defibrillators or cardioverters, insulin pumps, nerve stimulators, or any other indwelling infusion pump.
- Patients who are pregnant or nursing.
Trial locations and contacts
No sites are listed yet. Contact the study team or a site near you to ask about taking part.
About this study
Official title: Acute Management of PJI With Local Implant Retention and Antibiotics Using the Sola2 AMF Knee System: A Multicenter Double-blind Clinical Trial.
The goal of this clinical trial is to learn whether the Sola2 AMF Knee System, when added to surgery and antibiotic treatment, can safely improve outcomes, knee function, and quality of life in adults with knee implant infection.
The main questions this study aims to answer are:
Read more
- Whether adding the Sola2 AMF Knee System improves knee function and quality of life at 6 months.
- Whether adding the Sola2 AMF Knee System to surgery and antibiotic treatment affects the need for additional infection-related surgery.
- Whether the Sola2 AMF Knee System can be used safely, based on device-related adverse events through 12 months.
This study has two stages. In Stage 1, participants will be enrolled into sequential sentinel groups at increasing AMF temperature levels. All sentinel participants will receive active Sola2 AMF treatment. A safety review will occur after each sentinel group before proceeding to the next group. In Stage 2, researchers will compare participants who receive active Sola2 AMF treatment to participants who receive sham AMF treatment. All participants will receive surgery called debridement, antibiotics, and implant retention (DAIR), and antibiotic treatment for knee implant infection.
Participants will:
- Have DAIR surgery for knee implant infection;
- Receive pathogen-appropriate antibiotic treatment from the study doctor;
- If enrolled in Stage 1, receive active Sola2 AMF treatment at the designated sentinel temperature level;
- If enrolled in Stage 2, receive either active Sola2 AMF treatment or sham AMF treatment, depending on randomization assignment; and
- Complete follow-up visits and assessments for safety, infection status, pain, knee function, x-rays, laboratory tests, and other study-related outcomes.
Read the detailed description
The AMPLIFY trial is a prospective, multicenter, staged clinical investigation of the investigational Sola2 AMF Knee System in adults with confirmed knee periprosthetic joint infection (PJI) who will undergo debridement, antibiotics, and implant retention (DAIR) surgery and pathogen-appropriate antibiotic therapy.
The study is conducted under a single Investigational Device Exemption and includes two stages. Stage 1 is an open-label sentinel stage using sequential AMF temperature escalation. Sentinel participants receive active Sola2 AMF treatment, with safety review after each sentinel group before progression to the next planned temperature level or to the randomized stage. Stage 2 is a randomized, double-blind, sham-controlled stage in which participants are assigned to active Sola2 AMF treatment or sham AMF treatment.
The Sola2 AMF Knee System is an external, non-contacting investigational device that generates alternating magnetic fields intended to produce controlled heating at metallic knee implant surfaces. The AMF or sham treatment is administered in the operating room in conjunction with the planned DAIR procedure. All participants receive DAIR and pathogen-appropriate antibiotic therapy as part of their clinical care.
Safety oversight includes medical monitoring, independent Data Safety Monitoring Board review, and independent Clinical Events Committee adjudication as specified in the protocol.
- Conditions
- Prosthetic Joint Infection of Knee
- Being tested
- Intervention 1: Alternating Magnetic Field Treatment, Intervention 2 - Sham Treatment, Debridement, Antibiotics, Implant Retention
- Keywords
- Periprosthetic joint infection, Prosthetic joint infection, Knee implant infection, Debridement antibiotics and implant retention, Biofilm, Thermal treatment, Alternating Magnetic Field
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Intervention 1: Alternating Magnetic Field TreatmentDevice
Active alternating magnetic field treatment is delivered using the investigational Sola2 AMF Knee System. The system is an external, non-contacting device that generates alternating magnetic fields intended to produce controlled heating at metallic knee implant surfaces. Treatment is administered in the operating room in conjunction with DAIR.
Intervention 2 - Sham TreatmentDevice
Sham alternating magnetic field treatment is delivered during the randomized stage using the Sola2 AMF Knee System workflow. The sham treatment uses the same treatment timing and device-use steps as active treatment, without delivery of active alternating magnetic field energy
Debridement, Antibiotics, Implant RetentionProcedure or surgery
Debridement, antibiotics, and implant retention is the planned surgical treatment for participants with knee prosthetic joint infection participants. In this study, all participants undergo DAIR, including polyethylene spacer exchange, and receive pathogen-appropriate antibiotic therapy as part of standard clinical care.
| Study group | Role | What they receive |
|---|---|---|
| Arm 1: Stage 1 Sentinel Group A: Active Sola 2 AMF Treatment 55C | Experimental | Participants in the first open-label sentinel group receive active Sola2 AMF treatment at the planned 55°C AMF temperature level. Participants receive two active AMF treatments in the operating room, one before DAIR and one after DAIR and wound closure/bandaging. Safety data are reviewed before progression to the next sentinel group. Receives: Device: Intervention 1: Alternating Magnetic Field Treatment; Procedure: Debridement, Antibiotics, Implant Retention |
| Arm 2: Stage 1 Sentinel Group B: Active Sola 2 AMF Treatment 60°C | Experimental | Participants in the second open-label sentinel group receive active Sola2 AMF treatment at the planned 60°C AMF temperature level. Participants receive two active AMF treatments in the operating room, one before DAIR and one after DAIR and wound closure/bandaging. Enrollment in this group occurs only after safety review supports progression from Sentinel Group A. Receives: Device: Intervention 1: Alternating Magnetic Field Treatment; Procedure: Debridement, Antibiotics, Implant Retention |
| Arm 3: Stage 1 Sentinel Group C: Active Sola 2 AMF Treatment 65°C | Experimental | Participants in the third open-label sentinel group receive active Sola2 AMF treatment at the planned 65°C AMF temperature level. Participants receive two active AMF treatments in the operating room, one before DAIR and one after DAIR and wound closure/bandaging. Enrollment in this group occurs only after safety review supports progression from Sentinel Group B. Receives: Device: Intervention 1: Alternating Magnetic Field Treatment; Procedure: Debridement, Antibiotics, Implant Retention |
| Arm 4: Stage 2 Randomized Active AMF Treatment | Experimental | Participants randomized to the active treatment arm receive active Sola2 AMF treatment in conjunction with DAIR and pathogen-appropriate antibiotic therapy. Participants receive two active AMF treatments in the operating room, one before DAIR and one after DAIR and wound closure/bandaging. Receives: Device: Intervention 1: Alternating Magnetic Field Treatment; Procedure: Debridement, Antibiotics, Implant Retention |
| Arm 5: Stage 2 Randomized Sham AMF Treatment | Sham comparator | Participants randomized to the sham treatment arm receive sham AMF treatment in conjunction with DAIR and pathogen-appropriate antibiotic therapy. Participants undergo the same treatment timing and device-use steps as the active treatment arm, but active AMF energy is not delivered. Receives: Device: Intervention 2 - Sham Treatment; Procedure: Debridement, Antibiotics, Implant Retention |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change From Baseline in Knee Injury and Osteoarthritis Outcome Score for Joint Replacement
Change from baseline to 6 months in the Knee Injury and Osteoarthritis Outcome Score for Joint Replacement. The score is reported using the validated 0 to 100 interval scoring method, with higher scores indicating better knee health.
Measured: Baseline to 6 months
Incidence of Infection-Related Surgical Reintervention
Number and percentage of participants with a qualifying infection-related surgical reintervention event, as adjudicated by an independent Clinical Events Committee. Qualifying events include surgical reintervention due to relapse or surgical reintervention for ongoing infection, as defined in the protocol. Only the first adjudicated qualifying surgical reintervention event per participant contributes to the primary endpoint analysis.
Measured: From the index DAIR procedure through the primary efficacy analysis, triggered when 24 adjudicated events have occurred and at least 100 participants have completed 12-month follow-up
Incidence of AMF Study Device-Related Adverse Events
Number and percentage of participants with one or more adverse events determined to be related to the AMF study device. Potential primary safety endpoint events are independently adjudicated by the Clinical Events Committee according to the CEC charter.
Measured: Through 12 months post-procedure
Secondary outcomes (9)
Incidence, Severity, and Relatedness of Adverse Events and Serious Adverse Events
Between-arm comparison of the incidence, severity, and relatedness of adverse events and serious adverse events.
Measured: Through 12 months post-procedure
Time to Resolution and Duration of PJI-Related Signs and Symptoms
Between-arm comparison of the time to resolution and duration of PJI-related signs and symptoms, such as pain, drainage, erythema, and edema.
Measured: Through 12 months post-procedure
Proportion of Participants With Resolution or Marked Improvement of Infection-Related Symptoms
Between-arm comparison of the proportion of participants with resolution or marked improvement of infection-related symptoms at scheduled follow-up visits.
Measured: Through 12 months post-procedure
Change From Baseline in Numeric Rating Scale Pain Score
Between-arm comparison of change from baseline in participant-reported pain using the Numeric Rating Scale at scheduled follow-up visits. Scores range from 0 to 10, with higher scores indicating greater pain.
Measured: Baseline through 12 months post-procedure
Change From Baseline in Knee Injury and Osteoarthritis Outcome Score for Joint Replacement at Follow-Up Visits Over Time
Between-arm comparison of change from baseline in Knee Injury and Osteoarthritis Outcome Score for Joint Replacement at scheduled follow-up visits other than the 6-month primary endpoint. Scores are reported using the validated 0 to 100 interval scoring method, with higher scores indicating better knee health.
Measured: Baseline through 12 months post-procedure
Change From Baseline in Patient-Reported Outcomes Measurement Information System Patient-Reported Health Status
Between-arm comparison of change from baseline in Patient-Reported Outcomes Measurement Information System patient-reported health status at scheduled follow-up visits.
Measured: Baseline through 12 months post-procedure
Change From Baseline and Time to Normalization of C-Reactive Protein
Between-arm comparison of change from baseline and time to normalization of C-reactive protein among participants with elevated C-reactive protein at enrollment. Normalization is defined according to the reference range of the performing laboratory.
Measured: Baseline through 12 months post-procedure
Change From Baseline and Time to Normalization of Erythrocyte Sedimentation Rate
Between-arm comparison of change from baseline and time to normalization of erythrocyte sedimentation rate among participants with elevated erythrocyte sedimentation rate at enrollment. Normalization is defined according to the reference range of the performing laboratory.
Measured: Baseline through 12 months post-procedure
Proportion of Participants Achieving Biomarker Normalization
Proportion of Participants Achieving Biomarker Normalization
Measured: Through 12 months post-procedure
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted14 Jul 2026
- Study start18 Sep 2026 (estimated)
- Primary completionAug 2028 (estimated)
- Study completionAug 2029 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Prosthetic Joint Infection of KneeStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Sequential
- Model description
- This staged study includes a sequential open-label sentinel stage (Stage 1) followed by a randomized, double-blind, sham-controlled stage (Stage 2). In Stage 1, sentinel participants are enrolled sequentially into planned AMF temperature groups, with independent safety review before progression to the next group and before initiation of Stage 2. In Stage 2, participants are randomized 1:1 to active Sola2 AMF treatment or sham AMF treatment. All participants receive DAIR surgery and pathogen-appropriate antibiotic therapy.
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 165 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Solenic Medical, Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- Adolph V. Lombardi, MD, Principal investigator, Mount Carmel New Albany Surgical Hospital (JIS Orthopedics)Peter K Sculco, MD, Principal investigator, Hospital of Special Surgery (New York)
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07700927
- Sponsor's protocol ID
- SOL-200-2025
- Acronym
- AMPLIFY
- Status last verified
- Sep 2026
- First submitted
- 7 Jul 2026
- Last updated
- 22 Sep 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- Yes