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CLARITY I is a pilot study to identify the clinically appropriate endpoint(s) of a larger, statistically powered pivotal trial for treatment of patients with Critical Limb Ischemia (CLI).
This prospective, randomized, multi-center, post-market study of approximately 50 subjects randomized 1:1 to Orbital Atherectomy (OA) performed with Cardiovascular Systems, Inc.'s Orbital Atherectomy System (OAS) followed by adjunctive balloon angioplasty (BA) vs. BA alone for treatment of tibial vessel disease, defined as ≥ 50 % stenosis of the anterior tibial (AT), posterior tibial (PT), tibial peroneal trunk (TPT), or peroneal (PR) arteries by angiography. All subjects will have a corresponding wound being fed by the target vessel which will be assessed during the study. Subjects will be followed to one year.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Orbital Atherectomy System | Experimental | Orbital Atherectomy (OA) is performed prior to adjunctive Balloon Angioplasty (BA) |
|
| Balloon Angioplasty | Active Comparator | Balloon Angioplasty (BA) alone |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Orbital Atherectomy System | Device | Orbital atherectomy (OA) is performed prior to adjunctive balloon angioplasty (BA) |
|
| Measure | Description | Time Frame |
|---|---|---|
| Percentage of Calcium Removal Out of Lumen Gain as Assessed by IVUS | The post-treatment percentage of calcium removal out of lumen gain at the maximum calcium ablation site. A positive value equates to reduction in calcium out of the lumen gain. | Post-balloon angioplasty |
| Change in Minimum Lumen Area Percent Stenosis as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) minimum lumen area percent stenosis. A positive value equates to a decrease in lumen area percent stenosis. | Pre-intervention, and post-balloon angioplasty |
| Change in Plaque Area as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) plaque area. A positive value equates to a decrease in plaque area. | Pre-intervention, and post-balloon angioplasty |
| Change in Dense Calcium Area as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) dense calcium area. A positive value equates to a decrease in dense calcium area. | Pre-intervention, and post-balloon angioplasty |
| Change in Necrotic Core Area as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) necrotic core area. A positive value equates to a decrease necrotic core area. | Pre-intervention, and post-balloon angioplasty |
| Change in Fibrous Plaque Area as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) fibrous plaque area. A positive value equates to a decrease in fibrous plaque area. | Pre-intervention, and post-balloon angioplasty |
| Measure | Description | Time Frame |
|---|---|---|
| Fractional Flow Reserve | Fractional flow reserve (FFR) will be measured to assess hemodynamic function following each device procedure. During FFR, adenosine will be given through the femoral artery sheath or access catheter in two doses: 600 mcg and 1200 mcg. A higher FFR is presumed to correlate to better flow which may improve wound healing. | Post-orbital atherectomy (OA arm only) and post-balloon angioplasty (both arms) |
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General Inclusion Criteria:
General Exclusion Criteria:
Angiographic Inclusion Criteria:
Angiographic Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Raymond Dattilo, M.D. | St. Francis Heart and Vascular Center | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Arkansas Heart Clinic | Little Rock | Arkansas | 72211 | United States | ||
| Northside Hospital |
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| ID | Title | Description |
|---|---|---|
| FG000 | Orbital Atherectomy System | Orbital Atherectomy (OA) is performed prior to adjunctive Balloon Angioplasty (BA) Orbital Atherectomy System: Orbital atherectomy (OA) is performed prior to adjunctive balloon angioplasty (BA) Balloon Angioplasty: Type of balloon selected is driven by preference of the operator. |
| FG001 | Balloon Angioplasty | Balloon Angioplasty (BA) alone Balloon Angioplasty: Type of balloon selected is driven by preference of the operator. |
| Title | Milestones | Reasons Not Completed | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
|
|
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| ID | Title | Description |
|---|---|---|
| BG000 | Orbital Atherectomy System | Orbital Atherectomy (OA) is performed prior to adjunctive Balloon Angioplasty (BA) Orbital Atherectomy System: Orbital atherectomy (OA) is performed prior to adjunctive balloon angioplasty (BA) Balloon Angioplasty: Type of balloon selected is driven by preference of the operator. |
| BG001 |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | Mean |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | Percentage of Calcium Removal Out of Lumen Gain as Assessed by IVUS | The post-treatment percentage of calcium removal out of lumen gain at the maximum calcium ablation site. A positive value equates to reduction in calcium out of the lumen gain. | Not all subjects had reported IVUS data for each lesion pre- and post-treatment. | Posted | Median | Inter-Quartile Range | percentage of lumen gain | Post-balloon angioplasty | lesions | lesions |
|
AEs were collected during the index-procedure through 12 months of follow-up.
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | Orbital Atherectomy System | Orbital Atherectomy (OA) is performed prior to adjunctive Balloon Angioplasty (BA) Orbital Atherectomy System: Orbital atherectomy (OA) is performed prior to adjunctive balloon angioplasty (BA) Balloon Angioplasty: Type of balloon selected is driven by preference of the operator. |
| Term | Organ System | Source Vocabulary | Assessment Type | Notes | Statistical Information |
|---|---|---|---|---|---|
| Anemia | Blood and lymphatic system disorders | Non-systematic Assessment |
| Term | Organ System | Source Vocabulary | Assessment Type | Notes | Statistical Information |
|---|---|---|---|---|---|
| Access site bleeding | Injury, poisoning and procedural complications | Non-systematic Assessment |
CLARITY I was a non-powered trial without a hypothesis test of a small number of patients.
| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Clinical Trials Manager | Cardiovascular Systems, Inc. | 651.259.2500 | clinicaltrials_csi@csi360.com |
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| ID | Term |
|---|---|
| D058729 | Peripheral Arterial Disease |
| D000089802 | Chronic Limb-Threatening Ischemia |
| ID | Term |
|---|---|
| D050197 | Atherosclerosis |
| D001161 | Arteriosclerosis |
| D001157 | Arterial Occlusive Diseases |
| D014652 | Vascular Diseases |
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| ID | Term |
|---|---|
| D000800 | Angioplasty, Balloon |
| ID | Term |
|---|---|
| D017130 | Angioplasty |
| D002404 | Catheterization |
| D013812 | Therapeutics |
| D057510 | Endovascular Procedures |
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| Balloon Angioplasty | Device | Type of balloon selected is driven by preference of the operator. |
|
| Change in Fibrofatty Plaque Area as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) fibrofatty plaque area. A positive value equates to a decrease in fibrofatty plaque area. | Pre-intervention, and post-balloon angioplasty |
| Atlanta |
| Georgia |
| 30342 |
| United States |
| Midwest Cardiovascular Research Foundation | Davenport | Iowa | 52803 | United States |
| St. John Hospital and Medical Center | Detroit | Michigan | 48236 | United States |
| Holy Name Medical Center | Teaneck | New Jersey | 07666 | United States |
| Rex Hospital | Raleigh | North Carolina | 27607 | United States |
| Mission Research Institute | New Braunfels | Texas | 78130 | United States |
| Sentara Vascular Specialists | Norfolk | Virginia | 23507 | United States |
| Withdrawal by Subject |
|
| Balloon Angioplasty |
Balloon Angioplasty (BA) alone Balloon Angioplasty: Type of balloon selected is driven by preference of the operator. |
| BG002 | Total | Total of all reporting groups |
| years |
|
| Sex: Female, Male | Count of Participants | Participants |
|
| Ethnicity (NIH/OMB) | Count of Participants | Participants |
|
| Race (NIH/OMB) | Count of Participants | Participants |
|
| Region of Enrollment | Number | participants |
|
| Number of treated lesions | Number | lesions |
|
| Balloon Angioplasty |
Balloon Angioplasty (BA) alone Balloon Angioplasty: Type of balloon selected is driven by preference of the operator. |
|
|
|
| Primary | Change in Minimum Lumen Area Percent Stenosis as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) minimum lumen area percent stenosis. A positive value equates to a decrease in lumen area percent stenosis. | Not all subjects had reported IVUS data for each lesion pre- and post-treatment. | Posted | Median | Inter-Quartile Range | percent of minimum area stenosis | Pre-intervention, and post-balloon angioplasty | lesions | lesions |
|
|
|
|
| Primary | Change in Plaque Area as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) plaque area. A positive value equates to a decrease in plaque area. | Not all subjects had reported IVUS data for each lesion pre- and post-treatment. | Posted | Median | Inter-Quartile Range | area (mm^3/mm) | Pre-intervention, and post-balloon angioplasty | lesions | lesions |
|
|
|
|
| Primary | Change in Dense Calcium Area as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) dense calcium area. A positive value equates to a decrease in dense calcium area. | Not all subjects had reported IVUS data for each lesion pre- and post-treatment. | Posted | Median | Inter-Quartile Range | area (mm^3/mm) | Pre-intervention, and post-balloon angioplasty | lesions | lesions |
|
|
|
|
| Primary | Change in Necrotic Core Area as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) necrotic core area. A positive value equates to a decrease necrotic core area. | Not all subjects had reported IVUS data for each lesion pre- and post-treatment. | Posted | Median | Inter-Quartile Range | area (mm^3/mm) | Pre-intervention, and post-balloon angioplasty | lesions | lesions |
|
|
|
|
| Primary | Change in Fibrous Plaque Area as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) fibrous plaque area. A positive value equates to a decrease in fibrous plaque area. | Not all subjects had reported IVUS data for each lesion pre- and post-treatment. | Posted | Median | Inter-Quartile Range | area (mm^3/mm) | Pre-intervention, and post-balloon angioplasty | lesions | lesions |
|
|
|
|
| Primary | Change in Fibrofatty Plaque Area as Assessed by IVUS | The pre- (Pre-Tx) and post-treatment (Post-Tx) fibrofatty plaque area. A positive value equates to a decrease in fibrofatty plaque area. | Not all subjects had reported IVUS data for each lesion pre- and post-treatment. | Posted | Median | Inter-Quartile Range | area (mm^3/mm) | Pre-intervention, and post-balloon angioplasty | lesions | lesions |
|
|
|
|
| Secondary | Fractional Flow Reserve | Fractional flow reserve (FFR) will be measured to assess hemodynamic function following each device procedure. During FFR, adenosine will be given through the femoral artery sheath or access catheter in two doses: 600 mcg and 1200 mcg. A higher FFR is presumed to correlate to better flow which may improve wound healing. | Some sites were exempt from performing FFR. Not all subjects had available FFR. | Posted | Mean | Standard Deviation | Ratio (proximal/distal pressure) | Post-orbital atherectomy (OA arm only) and post-balloon angioplasty (both arms) | lesions | lesions |
|
|
|
|
| 3 |
| 25 |
| 22 |
| 25 |
| 4 |
| 25 |
| EG001 | Balloon Angioplasty | Balloon Angioplasty (BA) alone Balloon Angioplasty: Type of balloon selected is driven by preference of the operator. | 3 | 26 | 17 | 26 | 8 | 26 |
| Arrhythmia | Cardiac disorders | Non-systematic Assessment |
|
| Basal cell carcinoma | Neoplasms benign, malignant and unspecified (incl cysts and polyps) | Non-systematic Assessment |
|
| Cellulitis, index limb | Musculoskeletal and connective tissue disorders | Non-systematic Assessment |
|
| Congestive Heart Failure | Cardiac disorders | Non-systematic Assessment |
|
| Coronary Artery disease, worsening | Cardiac disorders | Non-systematic Assessment |
|
| Deep Vein Thrombosis, upper arm | Vascular disorders | Non-systematic Assessment |
|
| Death, cardiac | Cardiac disorders | Non-systematic Assessment |
|
| Death, non-cardiac | General disorders | Non-systematic Assessment |
|
| Death, unknown cause | General disorders | Non-systematic Assessment |
|
| Dissection | Injury, poisoning and procedural complications | Non-systematic Assessment |
|
| Distal embolization | Injury, poisoning and procedural complications | Non-systematic Assessment |
|
| GI bleeding | Gastrointestinal disorders | Non-systematic Assessment |
|
| Hernia repair | Surgical and medical procedures | Non-systematic Assessment |
|
| Infection, other | Infections and infestations | Non-systematic Assessment |
|
| Major amputation, index limb, due to infected knee replacement | Surgical and medical procedures | Non-systematic Assessment |
|
| Major amputation, index limb due to gangrene | Surgical and medical procedures | Non-systematic Assessment |
|
| Major amputation, index limb due to osteomyelitis | Surgical and medical procedures | Non-systematic Assessment |
|
| Medication overdose | General disorders | Non-systematic Assessment |
|
| Medication side effect | General disorders | Non-systematic Assessment |
|
| Minor amputation - pre-planned, index limb | Surgical and medical procedures | Non-systematic Assessment |
|
| Minor amputation, index limb due to gangrene | Surgical and medical procedures | Non-systematic Assessment |
|
| Minor amputation, index limb due to osteomyelitis | Surgical and medical procedures | Non-systematic Assessment |
|
| Minor amputation, non-index limb due to gangrene | Surgical and medical procedures | Non-systematic Assessment |
|
| Minor amputation, non-index limb due to osteomyelitis | Surgical and medical procedures | Non-systematic Assessment |
|
| Myocardial infarction | Cardiac disorders | Non-systematic Assessment |
|
| Osteomyelitis, index limb | Infections and infestations | Non-systematic Assessment |
|
| Osteomyelitis, non-index limb | Infections and infestations | Non-systematic Assessment |
|
| Other - Syncope | General disorders | Non-systematic Assessment |
|
| Pneumonia | Respiratory, thoracic and mediastinal disorders | Non-systematic Assessment |
|
| Recoil | Injury, poisoning and procedural complications | Non-systematic Assessment |
|
| Renal failure | Renal and urinary disorders | Non-systematic Assessment |
|
| Respiratory failure | Respiratory, thoracic and mediastinal disorders | Non-systematic Assessment |
|
| Revascularization - pre-planned, non-index limb | Surgical and medical procedures | Non-systematic Assessment |
|
| Revascularization, index limb (non-TVR) | Surgical and medical procedures | Non-systematic Assessment |
|
| Revascularization, index limb (TLR) | Surgical and medical procedures | Non-systematic Assessment |
|
| Revascularization, non-index limb | Surgical and medical procedures | Non-systematic Assessment |
|
| Urinary tract infection | Renal and urinary disorders | Non-systematic Assessment |
|
| Urinary retention | Renal and urinary disorders | Non-systematic Assessment |
|
| Worsening of index wound | Vascular disorders | Non-systematic Assessment |
|
| Dissection | Injury, poisoning and procedural complications | Non-systematic Assessment |
|
| Lower extremity edema | General disorders | Non-systematic Assessment |
|
| Pseudoaneurysm, access site | Injury, poisoning and procedural complications | Non-systematic Assessment |
|
| Slow flow | Injury, poisoning and procedural complications | Non-systematic Assessment |
|
| Urinary tract infection | Renal and urinary disorders | Non-systematic Assessment |
|
| Vessel spasm | Injury, poisoning and procedural complications | Non-systematic Assessment |
|
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| D002318 |
| Cardiovascular Diseases |
| D016491 | Peripheral Vascular Diseases |
| D002908 | Chronic Disease |
| D020969 | Disease Attributes |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D007511 | Ischemia |
| D014656 |
| Vascular Surgical Procedures |
| D013504 | Cardiovascular Surgical Procedures |
| D013514 | Surgical Procedures, Operative |
| D019060 | Minimally Invasive Surgical Procedures |
| D008919 | Investigative Techniques |
|
| Post-Tx, minimum area stenosis (%) |
|
|
|
| Post-Tx, plaque area (mm^3/mm) |
|
|
|
| Post-Tx, dense calcium area (mm^3/mm) |
|
|
|
| Post-Tx, necrotic core area (mm^3/mm) |
|
|
|
| Post-Tx, fibrous plaque area (mm^3/mm) |
|
|
|
| Post-Tx, fibrofatty plaque area (mm^3/mm) |
|
|
|
| Post final OAS: FFR with 1200 mcg adenosine |
|
|
| Post final balloon: FFR w/ 600 mcg adenosine |
|
|
| Post final balloon: FFR w/ 1200 mcg adenosine |
|
|
Null hypothesis: no difference in populations for post-final balloon FFR value with 1200 mcg adenosine.
| t-test, 2 sided |
| 0.205 |
| Other |
No pre-specified hypothesis test or power calculation specified in protocol. |