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Not yet recruitingNCT06906055Updated Apr 2, 2025

Below-the-Knee Interventions for Limb Salvage: Use of Multifunctional Angioplasty Balloon Catheters

An interventional study of Multicath and Standard of Care (SOC) in Peripheral Arterial Disease Below the Knee and Peripheral Arterial Disease, Rutherford 4 and 5 with Possibility to Improve Vascularization, sponsored by Summa Therapeutics, LLC. Not yet recruiting at 2 sites in United States. Open to participants aged 18 Years to 120 Years. Per ClinicalTrials.gov, last updated 2025-04-02.

Sponsored by Summa Therapeutics, LLC · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Dec 2025, 10 months ago, but the record still lists the study as not yet recruiting.
Phase
Not applicable
Study type
Interventional
Enrollment
24
Allocation
Non-randomized
Ages
18 Years to 120 Years
Sex
All
01

Study summary

Below-the-Knee Interventions for Limb Salvage: Use of Multifunctional Angioplasty Balloon Catheters ("BTK Multicath Registry")

A non-randomized clinical registry

This study is designed to obtain preliminary data on clinically relevant procedural variables during percutaneous below-knee artery revascularization procedures among consecutive patients treated with either the Finesse BTK Multicath® ("Finesse") or the standard of care using conventional angioplasty balloon catheters.

This registry will enroll participants with a history of chronic limb threatening ischemia and below-knee arterial insufficiency who will be assigned to revascularization with or without use of the Finesse BTK Multicath. The registry is an acute study examining procedural data only. The primary endpoints of interest are the volume of contrast used for the intervention, overall procedure time, radiation dose, number of catheter exchanges during revascularization, and medical device supply costs. For the first phase 12 consecutive patients will be treated with the standard of care. For the second phase 12 consecutive patients will be treated with Finesse.

24 participants total

Up to 5 study sites in the United States

Initial anticipated enrollment: Q4 2024 Last anticipated enrollment: Q2 2025

Patients >=18 years old with documented history of unilateral chronic limb threatening ischemia due to below-knee arterial insufficiency with angiographic runoff in the foot and limited arterial insufficiency above the knee

  1. Contrast volume administered during the revascularization portion of a procedure.
  2. Number of catheter exchanges during revascularization
  3. Fluoroscopy time
  4. Radiation dose during revascularization
  5. Procedure time post-enrollment
  6. Equipment costs
  7. Reduced use of supplies
  8. Technical success
  9. Safety/Major Adverse Peripheral Events

On-treatment sample Intention-to-treat

02

Conditions studied

  • Peripheral Arterial Disease Below the Knee
  • Peripheral Arterial Disease, Rutherford 4 and 5 with Possibility to Improve Vascularization

Keywords

  • angioplasty
  • limb threatening ischemia
  • amputation
  • diabetes
  • chronic kidney disease
  • ischemic ulcer
  • rest pain
  • gangrene
  • atherosclerosis
03

In context

Peripheral Arterial Disease

1,377 studies on the registry are indexed under Peripheral Arterial Disease; 275 are open to participants now.

This study's planned enrollment of 24 is below the median of 70 across 927 interventional studies indexed under Peripheral Arterial Disease.

Browse Peripheral Arterial Disease studies →

Lead sponsor

This is the only study on the registry with Summa Therapeutics, LLC as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 120 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Participant must provide written prior to any clinical investigation-related procedures.
  • Age ≥ 18 years
  • Planned lower extremity catheter-based revascularization for Rutherford 4 through 6 chronic limb-threatening ischemia (Table 1)
  • Stenotic (>=70% stenosis by visual estimate) or occlusive lesion in an infrapopliteal artery (anterior tibial, peroneal, or posterior tibial) by angiography
  • Target lesion up to 25cm in length by angiography

Exclusion criteria

Exclusion Criteria:

  • Participation in another clinical investigation that has not yet completed its primary end point.
  • Incapacitated individuals, defined as persons who are mentally ill, mentally handicapped, or individuals without legal authority, are excluded from the study population.
  • Female subjects of unless negative pregnancy test or use
  • Bilateral critical limb ischemia
  • Planned bilateral vascular intervention
  • Lack of reconstitution of foot runoff vessels at ankle joint
  • Planned below-the-ankle intervention after completion of diagnostic angiography
  • Planned suprainguinal intervention ->=5cm with at least 50% stenosis of the above knee femoro-popliteal artery
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
24 participants (estimated)

Study arms

  • Active comparator
    Standard of care

    Use of conventional single function crossing catheters, diagnostic catheters, angioplasty balloon catheters

    Device: Standard of Care (SOC)

  • Experimental
    Finesse BTK Multicath

    Use of a multifunctional revascularization catheter

    Device: Multicath

Interventions

  • DeviceMulticath

    Use of a multifunctional catheter for revascularization of blocked arteries below the knee

  • DeviceStandard of Care (SOC)

    Use of single function crossing catheters, diagnostic catheters, angioplasty balloon catheters

06

What researchers measure

Primary outcomes

  1. Contrast volume

    Time frame: during the intervention/procedure/surgery

Other outcomes

  1. Procedure duration

    Time frame: during the intervention

  2. Radiation dose

    Time frame: during the intervention

  3. Fluoroscopy time

    Time frame: during the intervention

  4. Number of catheter exchanges

    Time frame: during the intervention

  5. Equipment costs

    Time frame: during the intervention

  6. Rate of use of microcatheters or diagnostic catheters

    Time frame: during the intervention/procedure/surgery

  7. Rate of technically successful revascularization of a continuous artery in the calf

    Time frame: during the intervention/procedure/surgery

  8. Adverse events

    Time frame: during the intervention

07

Study locations

2 sites
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 2, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06906055
Lead sponsor
Summa Therapeutics, LLC
Responsible party
Sponsor
First posted
Apr 2, 2025
Start date
Apr 3, 2025 (estimated)
Primary completion
Dec 31, 2025 (estimated)
Completion
Jun 30, 2026 (estimated)
Last update
Apr 2, 2025

Study contacts

Timothy Murphy, M.D.
Contact
info@summatherapeutics.com
8772672685

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in Mar 2025. You cannot join it, but the record below documents what was studied.

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