ClinicalTrials.gg
TerminatedNCT04999163A PrioriUpdated Nov 12, 2024Results posted

Aortix Therapy for Perioperative Reduction of Kidney Injury

An interventional study of Aortix System in Acute Kidney Injury, sponsored by Procyrion. Terminated at 5 sites in Australia. Open to participants aged 21 Years and older. Per ClinicalTrials.gov, last updated 2024-11-12.

Sponsored by Procyrion · Not applicable, Interventional, and Prevention

Why this study was terminated
It has been decided that further enrollment in this study, as designed, will not be able to answer the proposed hypothesis of the study.
Phase
Not applicable
Study type
Interventional
Enrollment
20
Allocation
Non-randomized
Ages
21 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 23 studies in Acute Kidney Injury with a site in Australia — 3 open to participants now, 4 under way, none of them phase 3. Acute Kidney Injury · Australia.

Enrollment
16th of 18
20 · median 208
Started
2022
the only one that year
No phase
4 of 23
none open now
Registered
16th of 23
by date

Among the 23 studies in Acute Kidney Injury with a site in Australia, this one is the 16th largest by enrollment of the 18 interventional ones, is the only one that started in 2022, is one of 4 with no phase, and was the 16th registered.

By phase

23 studies; the count open now beside each. This study's row is marked.

Phase 26 · 1 open
Observational5 · 2 open
No phasethis study4 · 0 open
Phase 33 · 0 open
Phase 1/22 · 0 open
Phase 42 · 0 open
Phase 2/31 · 0 open

By the year they started

First in 2005; this study’s year is marked. 1 started in 2022.

Size and results

Median enrollment 208 across the 18 interventional studies, 2,000 across the 5 observational. Of the 18 that completed or were terminated, 4 (22%) have results posted.

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02

Study summary

The study is a prospective, non-randomized feasibility study to evaluate the safety and performance of providing support with the Aortix System to patients at heightened risk of acute kidney injury (AKI) undergoing cardiovascular surgery.

Read the detailed description

The study is a prospective, non-randomized feasibility study to evaluate the safety and performance of providing support with the Aortix System to patients at heightened risk of acute kidney injury (AKI) undergoing cardiovascular surgery. Patients who decline Aortix system implant or fail to meet anatomical requirements for Aortix implant will be followed in the non-Aortix arm. Both arms will have the same visit schedule and data collection requirements with the exception of data pertaining to the Aortix system. Data will be reported for both groups.

03

Conditions studied

  • Acute Kidney Injury

Browse trials for

04

Who can participate

Ages eligible
21 Years and older
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

  1. Have the following risk factor(s) for AKI prior to surgery:

    1. Estimated (eGFR) of ≥ 15 and \< 30 ml/min/1.73m2, OR
    2. eGFR ≥ 30 and \< 60 ml/min/1.73m2 and ONE or more of the following:

      1. Diabetes (regardless of cause) with metabolic, renal, ophthalmic, neurologic, circulatory, or other complications
      2. Documented class III or IV heart failure within 1 year prior to enrollment
      3. \< 35%
      4. Hypertension with comorbid heart or kidney disease
      5. Persistent Atrial Fibrillation
  2. Planned (non-emergency) cardiac surgical procedure including, but not limited to coronary bypass surgery, surgical valve replacement or valve repair
  3. Age >21 years, willing and able to provide written .

Exclusion criteria

-

Exclusion Criteria:

  1. An of \<15 ml/min/1.73m2 at enrollment
  2. Cardiac surgical procedure that uses femoral artery cannulation for cardiopulmonary bypass
  3. Current support with a durable LVAD, intra-aortic balloon pump, extracorporeal membrane oxygenation (ECMO), or percutaneous ventricular assist devices (e.g., Impella or TandemHeart)
  4. Patient has known hypo- or hyper-coagulable state such as disseminated intravascular coagulation or heparin induced thrombocytopenia (HIT)
  5. Endovascular procedure with ilio-femoral access >12F within previous 30 days
  6. Severe Bleeding Risk (any of the following):

    1. Previous intracranial bleed such that the patient cannot safely use anticoagulation per the study requirements
    2. count \<75,000 cells/mm3
    3. Uncorrectable bleeding diathesis or coagulopathy (e.g., ≥ 2 not due to anticoagulation therapy
  7. Current endovascular stent graft in the descending aorta or either ilio-femoral vessels
  8. Anatomy:

    1. Descending aortic anatomy that would prevent safe placement of the device [\<18 mm or >31 mm aorta diameter at deployment location (measured between the superior aspect of the T10 vertebra and superior aspect of the L1 vertebra)]
    2. Ilio-femoral diameter or peripheral vascular anatomy that would preclude safe placement of a 21F (outer diameter) introducer sheath
    3. Abnormalities or severe vascular disease that would preclude safe access and device delivery (e.g., aneurysm with thrombus; marked tortuosity; significant narrowing or inadequate size of the abdominal aorta, iliac, or femoral arteries; or severe calcification)
    4. Known connective tissue disorder (e.g., Marfan Syndrome) or other aortopathy at risk of vascular injury
  9. Known or contraindication to study required medications (e.g., anticoagulation therapy) or device materials (e.g., history of severe reaction to nickel or nitinol)
  10. Positive pregnancy test if of
  11. Participation in any other clinical investigation that is likely to confound study results or affect the study

    -

Terms in these criteria, in plain language(9)

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.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

NYHA class (heart failure)

The New York Heart Association’s four classes of how much heart failure limits physical activity.

I
No limits: ordinary activity causes no undue tiredness or breathlessness.
II
Slight limits: comfortable at rest, ordinary activity causes symptoms.
III
Marked limits: comfortable at rest, less than ordinary activity causes symptoms.
IV
Symptoms even at rest; any activity makes them worse.

Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.

LVEF (left ventricular ejection fraction)

The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.

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.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

INR, PT and aPTT (clotting tests)

Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.

Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

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.

05

Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Non-randomized
Intervention model
Single group
Masking
None (open label)
Enrollment
20 participants (actual)

Study arms

  • Experimental
    Aortix Arm

    Subject receives the Aortix device.

    Device: Aortix System

  • No intervention
    Non-Aortix Arm

    Control Arm consists of subjects who choose not to receive the Aortix device or who do not meet the anatomical requirements to receive the Aortix device.

Interventions

  • DeviceAortix System

    Aortix is indicated as a partial circulatory support device to increase renal perfusion and reduce the incidence of acute kidney injury (AKI) in patients undergoing cardiac surgery who are at heightened risk of developing AKI.

06

What researchers measure

Primary outcomes

  1. Number of Participants With Serious Adverse Events Related to Aortix

    The number of participants with Serious Adverse Events related to the Aortix implant, retrieval, and therapy.

    Time frame: Enrollment to 30 days post-surgery

  2. Number of Participants With Baseline AKI Stage Compared to AKI Stage at 72 Hours Post-surgery

    The intention is to characterize the change in severity of acute kidney injury observed at 72 hours post-surgery using the KDIGO AKI staging criteria. AKI Stage as defined by the Kidney Disease Improving Global Outcomes (KDIGO) clinical practice guidelines defines the level of acute kidney injury with Stage 1 being the lowest level of kidney injury and Stage 3 being the most severe. None refers to no acute kidney injury.

    Time frame: Baseline to 72 hours post-surgery

  3. Number of Participants Requiring Postoperative Use of Renal Replacement Therapy, Ultrafiltration, and/or Dialysis.

    Renal replacement therapy (RRT), ultrafiltration, and dialysis are three treatment options for subjects with severe acute kidney injury and serve as a measure of the degree of acute kidney injury experienced by each group. Any subject receiving any of these therapies prior to 30 days post surgery are counted in this analysis.

    Time frame: Aortix placement to 30 days post- surgery

  4. Effectiveness

    Characterize the rate of 30-day post-surgery readmission due to worsening renal function

    Time frame: If discharged by day 30 post-surgery

07

Results

Posted Nov 12, 2024
Limitations and caveats
Early termination of the study leading to small numbers of subjects analyzed. The non-Aortix group did not show the expected incidence of acute kidney injury during and following surgery and therefore a comparison between the groups could not be made. As a result study enrollment was stopped early and the study was terminated.

Participant flow

Patients were enrolled at 4 investigational sites in Australia between July 17, 2022 and August 7, 2023.

Participant flow — Overall Study
MilestoneAortix ArmNon-Aortix Arm
Started119
Completed89
Not completed30
Withdrew: Surgery completed at hospital not participating in the study.10
Withdrew: Study enrollment stopped prior to implant.10
Withdrew: Withdrawal by subject10

Outcome measures

PrimaryNumber of Participants With Serious Adverse Events Related to Aortix

The number of participants with Serious Adverse Events related to the Aortix implant, retrieval, and therapy.

Time frame:
Enrollment to 30 days post-surgery
Reported as:
Count of participants · Participants
Number of Participants With Serious Adverse Events Related to Aortix
ParticipantsAortix Arm
Bleeding (BARC 3b)1
Hemolysis, Transient, Major1
No Serious Related Adverse Events6
PrimaryNumber of Participants With Baseline AKI Stage Compared to AKI Stage at 72 Hours Post-surgery

The intention is to characterize the change in severity of acute kidney injury observed at 72 hours post-surgery using the KDIGO AKI staging criteria. AKI Stage as defined by the Kidney Disease Improving Global Outcomes (KDIGO) clinical practice guidelines defines the level of acute kidney injury with Stage 1 being the lowest level of kidney injury and Stage 3 being the most severe. None refers to no acute kidney injury.

Time frame:
Baseline to 72 hours post-surgery
Reported as:
Count of participants · Participants
Number of Participants With Baseline AKI Stage Compared to AKI Stage at 72 Hours Post-surgery
ParticipantsAortix ArmNon-Aortix Arm
No Change17
From None to AKI Stage 140
From None to AKI Stage 210
From None to AKI Stage 310
From AKI Stage 1 to None01
Missing Data01
PrimaryNumber of Participants Requiring Postoperative Use of Renal Replacement Therapy, Ultrafiltration, and/or Dialysis.

Renal replacement therapy (RRT), ultrafiltration, and dialysis are three treatment options for subjects with severe acute kidney injury and serve as a measure of the degree of acute kidney injury experienced by each group. Any subject receiving any of these therapies prior to 30 days post surgery are counted in this analysis.

Time frame:
Aortix placement to 30 days post- surgery
Reported as:
Count of participants · Participants
Number of Participants Requiring Postoperative Use of Renal Replacement Therapy, Ultrafiltration, and/or Dialysis.
ParticipantsAortix ArmNon-Aortix Arm
Number of Participants Requiring Postoperative Use of Renal Replacement Therapy, Ultrafiltration, and/or Dialysis.11
PrimaryEffectiveness

Characterize the rate of 30-day post-surgery readmission due to worsening renal function

Time frame:
If discharged by day 30 post-surgery
Reported as:
Count of participants · Participants
Effectiveness
ParticipantsAortix ArmNon-Aortix Arm
Effectiveness00

Adverse events

Collected over Adverse Events were collected from enrollment to 30-Days post surgery.. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Aortix Arm0/8 (0%)8/8 (100%)6/8 (75%)
Non-Aortix Arm0/9 (0%)4/9 (44.4%)3/9 (33.3%)
Most frequent serious events
Showing 10 of 12
Most frequent serious events
EventAortix ArmNon-Aortix Arm
BleedingVascular disorders4/82/9
Renal InjuryRenal and urinary disorders2/81/9
OtherGeneral disorders2/81/9
Hemolysis, Transient, MajorBlood and lymphatic system disorders1/80/9
Cardiogenic ShockCardiac disorders1/81/9
Psychiatric EpisodePsychiatric disorders1/80/9
AnemiaBlood and lymphatic system disorders1/80/9
HypotensionCardiac disorders1/80/9
Pericardial EffusionCardiac disorders0/81/9
Vascular InjuryVascular disorders0/81/9
Most frequent other events
Most frequent other events
EventAortix ArmNon-Aortix Arm
Renal InjuryRenal and urinary disorders3/81/9
Bleeding EventVascular disorders1/80/9
Pleural EffusionRespiratory, thoracic and mediastinal disorders1/81/9
OtherGeneral disorders1/80/9
ArrhythmiaCardiac disorders0/81/9
GI MiscellaneousGastrointestinal disorders0/81/9

Baseline characteristics

All participants that completed the study follow-up.

Age, Continuous
Age, Continuous(years)Aortix ArmNon-Aortix ArmTotal
Mean66.0 ± 8.6771.4 ± 6.9868.9 ± 8.07
Sex: Female, Male
Sex: Female, Male(Participants)Aortix ArmNon-Aortix ArmTotal
Female123
Male7714
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Aortix ArmNon-Aortix ArmTotal
Hispanic or Latino000
Not Hispanic or Latino8917
Unknown or Not Reported000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Aortix ArmNon-Aortix ArmTotal
American Indian or Alaska Native000
Asian000
Native Hawaiian or Other Pacific Islander000
Black or African American000
White7815
More than one race000
Unknown or Not Reported112
AKI Stage
AKI Stage(Participants)Aortix ArmNon-Aortix ArmTotal
AKI Stage 1112
AKI Stage 2000
AKI Stage 3022
None7613
eGFR
eGFR(ml/min/1.73m^2)Aortix ArmNon-Aortix ArmTotal
Mean49.9 ± 8.3246.6 ± 10.8248.1 ± 9.58
NYHA Classification
NYHA Classification(Participants)Aortix ArmNon-Aortix ArmTotal
Class I235
Class II033
Class III538
Class IV101
LVEF
LVEF(percentage of LV ejection fraction)Aortix ArmNon-Aortix ArmTotal
Mean47.0 ± 16.4656.8 ± 13.2452.2 ± 15.21

3 further baseline measures are reported on the registry.

08

Study locations

5 sites
  • Royal Adelaide Hospital
    Adelaide, Australia
  • Prince Charles Hospital
    Brisbane, Australia
  • Princess Alexandra Hospital
    Brisbane, Australia
  • Monash Health
    Melbourne, Australia
  • Macquarie University
    Sydney, Australia
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: No

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Jul 2022 to primary completion in Aug 2023, 13 months.

Results were first posted in Nov 2024, 1 year 2 months after primary completion.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 3, 2021
First posted
Aug 10, 2021
StartActual
Jul 17, 2022
Primary completionActual
Aug 22, 2023
CompletionActual
Aug 22, 2023
Results first posted
Nov 12, 2024
Last update
Nov 12, 2024
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Nov 12, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04999163
Lead sponsor
Procyrion
Collaborators
Procyrion Australia Pty Ltd
Responsible party
Sponsor
First posted
Aug 10, 2021
Start date
Jul 17, 2022
Primary completion
Aug 22, 2023
Completion
Aug 22, 2023
Results posted
Nov 12, 2024
Last update
Nov 12, 2024

Oversight

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

Not currently enrolling

This study is terminated, as verified in Oct 2024. You cannot join it, but the record below documents what was studied.

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Discussion

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