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Dabigatran til supplerende behandling af Staphylococcus Aureus-bakteriæmi (DABI-SNAP)

Dabigatran til supplerende behandling af Staphylococcus Aureus Bacteremia: DABI-SNAP Nested Randomized Controlled Trial

This is an open-label randomized controlled trial which will enroll patients with S. aureus bacteremia who are already taking oral anticoagulant medications (apixaban, edoxaban, or rivaroxaban) for an approved indication (stroke prevention in atrial fibrillation, prevention or treatment of venous thromboembolism). We will randomize patients to continue their existing medication or change to another medication (dabigatran) which is approved for the original indication.

Dabigatran is approved in many countries for the treatment or prevention of venous thromboembolism or preventing stroke in atrial fibrillation. Unlike the other medications listed above, dabigatran seems to have activity against S. aureus in the test tube, in animal models, and in a smaller randomized controlled trial. We wish to determine if changing to dabigatran will improve outcomes in S. aureus bacteremia in people who otherwise would have a reason to be taking it.

This study is an approved sub-study of The Staphylococcus aureus Network Adaptive Platform (SNAP) trial (NCT05137119).

If positive, this study will support a second RCT in people who do not currently have an indication for anticoagulation.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

300

Fase

  • Fase 4

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

    • Newfoundland and Labrador
      • St. John's, Newfoundland and Labrador, Canada, NL A1C 5B8
        • Rekruttering
        • NL and Labrador Health Services- St. Clare's Mercy Hospital
        • Ledende efterforsker:
          • Peter Daley, MD
        • Kontakt:
      • St. John's, Newfoundland and Labrador, Canada, A1B 3V6
        • Rekruttering
        • NL and Labrador Health Services- Health Sciences Centre
        • Ledende efterforsker:
          • Peter Daley, MD
        • Kontakt:
    • Quebec
      • Montreal, Quebec, Canada, H4A3S1
        • Rekruttering
        • McGill University Health Centre (Royal Victoria Hospital and Montreal General Hospital)
        • Ledende efterforsker:
          • Emily G McDonald, MD MSc
        • Ledende efterforsker:
          • Todd C Lee, MD MPH FIDSA
        • Underforsker:
          • Alexander Lawandi, MD MSc
        • Underforsker:
          • Matthew P. Cheng, MD SM
        • Underforsker:
          • Patrick Lawler, MD MPH
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

The participant must meet all inclusion and exclusion criteria for the SNAP Platform (NCT05137119) and also the following inclusion and exclusion criteria:

Inclusion Criteria:

  • Patient is taking (or will imminently start taking) an oral Xa inhibitor (e.g., apixaban, edoxaban, rivaroxaban) for: stroke prevention in atrial fibrillation, treatment or secondary prevention of deep venous thrombosis or pulmonary embolism, prevention of VTE in patients who have undergone elective total hip or total knee replacement surgery provided there are 30 or more days of planned treatment remaining at the time of enrolment.

Exclusion Criteria:

  • Active bleeding as determine by the site investigator after discussion with the treating team (patient may remain eligible for up to 120 hours from platform entry if condition is resolved and antithrombotic therapy is resumed)
  • Anticipated major cardiac surgery, neurosurgery, or spine surgery within the next 3 days
  • Known pregnancy (with testing available for women with childbearing potential)
  • Known use of dabigatran within last month
  • Allergy to dabigatran
  • Concomitant use of amiodarone, ketoconazole, rifampin, verapamil, clopidogrel, prasugrel, or ticagrelor
  • eGFR < 30mL/minute calculated by Cockcroft-Gault equation using adjusted weight [patient may remain eligible for up to 120 hours from platform entry if acute kidney injury is resolved such that antithrombotic therapy can be safely resumed/prescribed]
  • Off label use (e.g., metallic mechanical heart valve, left ventricular thrombus, antiphospholipid antibody syndrome)

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Change to Dabigatran

Patients will have their anticoagulation changed to dabigatran at the monograph approved dose for the indication, bleeding risk, and renal function.

Patients will be assigned to change to dabigatran at the monograph approved dose for their indication, bleeding risk, and renal function.

Aktiv komparator: Continue current anticoagulant

Patients will continue their currently prescribed apixaban, edoxaban, or rivaroxaban

Patients will continue taking their currently prescribed apixaban, edoxaban, or rivaroxaban

Patients will continue taking their currently prescribed apixaban, edoxaban, or rivaroxaban

Patients will continue taking their currently prescribed apixaban, edoxaban, or rivaroxaban

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Desirability of Outcome Ranking (DOOR)
Tidsramme: Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

Desirability of Outcome Ranking (DOOR) - an ordinal outcome with 5 levels defined:

Rank 1 - Alive without complication Rank 2 - Alive with 1 complication Rank 3 - Alive with 2 complications Rank 4 - Alive with 3 complications Rank 5 - Dead

Complications include:

  1. Clinical failure: Absence of resolution of clinical signs and symptoms of S. aureus bacteremia such that no additional antibiotic therapy is required or anticipated.
  2. Infectious Complications: Including new endocarditis; new evidence of other deep metastatic foci (e.g., osteomyelitis or deep abscess); relapse of MRSA bacteremia after a patient has sterilized their initial blood cultures; readmission for subsequent care of S. aureus bacteremia; need for unplanned source control procedures
  3. Serious adverse drug event (Common Terminology Criteria class 4) due to study drug OR adverse drug event (classes 1-3) leading to discontinuation of the study drug
Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Serious Adverse Event or Adverse Event Leading to Discontinuation
Tidsramme: Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

Defined as a serious adverse drug event (Common Terminology Criteria for Adverse Events (CTCAE) class 4) presumed due to study drug OR adverse drug event (CTCAE classes 1-3) leading to discontinuation of the study drug

Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)
All cause mortality
Tidsramme: Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

Death from any cause

Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)
Infectious Complications
Tidsramme: Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

Defined as change in therapy for inadequate clinical response; new endocarditis; new evidence of other deep metastatic foci (e.g., osteomyelitis or deep abscess); relapse of MRSA bacteremia after a patient has sterilized their initial blood cultures; readmission for subsequent care of S. aureus bacteremia; need for unplanned source control procedures. New implies that the complication was not suspected at enrollment and is not a function of delay to diagnostic testing.

Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)
Clinically relevant major bleeding
Tidsramme: Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

This will be defined according to the criteria of the International Society on Thrombosis and Haemostasis as one or more of the following: fatal bleeding; symptomatic bleeding in a critical area or organ (including hemorrhagic stroke); bleeding that causes a fall in hemoglobin level of ≥20 g/L; or bleeding that requires a transfusion of 2 or more units of whole blood or red cells. For bleeds into non-critical areas, we will also record the site of bleeding.

Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)
Clinically relevant venous thromboembolic events
Tidsramme: Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

This will be defined as an acute objectively confirmed deep vein thrombosis (upper extremity, lower extremity, other such as portal vein, cerebral vein, splanchnic vein) and/or segment or proximal pulmonary embolism, which is symptomatic and/or necessitates specific treatment. Below knee DVT and superficial thrombophlebitis are not included. Pulmonary embolism needs to be, segmental or proximal. Subsegmental pulmonary embolisms are not included as they have poor interrater reliability and may represent artefact in up to 50% of cases.

Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)
Clinically relevant stroke
Tidsramme: Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

Stroke is defined as the acute onset of focal neurological dysfunction caused by brain, spinal cord, or retinal vascular injury because of infarction (ischemia). Ideally, at least one of the following should be present to confirm the diagnosis of stroke: confirmation by neurology, stroke specialist, or neurosurgical specialist, brain imaging (e.g., CT scan, MRI scan, or cerebral vessel angiography compatible with acute ischemia). If the acute focal signs represent a worsening of a previous deficit, these signs must persist for more than 24 hours and be accompanied by an appropriate new MRI or CT scan finding. In the absence of neuroimaging, a staff neurologist consult which makes the diagnosis of stroke will be considered.

Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)
Clinically relevant acute myocardial infarction
Tidsramme: Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

Patients with S. aureus bacteremia often have substantial physiological stresses which can be associated with rises in cardiac troponin (demand ischemia). For the purposes of this outcome, acute myocardial infarction is captured as a type 1 myocardial infarction: detection of rise and/or fall of cardiac biomarkers with at least one value above the 99th percentile of the upper reference limit together with evidence of myocardial ischemia. For the purposes of this pragmatic trial, such a myocardial infarction will be inferred from the opinions of the staff cardiologist, intensivist, or general internal medicine specialist. The peak troponin value will be recorded, and a redacted copy of the relevant consultant's note and ECGs will be uploaded for audit.

Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)
Clinically relevant arterial thromboembolic event
Tidsramme: Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

Clinical history compatible with sudden worsening of end organ or limb perfusion and confirmation by imaging (e.g., CT angiography, arterial doppler) or need for urgent surgery or thrombolysis.

Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)
Clinical failure
Tidsramme: Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

Defined as the absence of resolution of clinical signs and symptoms of S. aureus bacteremia such that no additional antibiotic therapy is required or anticipated for its treatment.

Day 90 post enrollment in the S. aureus Network Adaptive Platform Trial (NCT05137119)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Efterforskere

  • Ledende efterforsker: Emily G McDonald, MD MSC, Research Institute of the McGill University Health Centre

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

15. januar 2026

Primær færdiggørelse (Anslået)

1. januar 2030

Studieafslutning (Anslået)

1. januar 2030

Datoer for studieregistrering

Først indsendt

18. oktober 2024

Først indsendt, der opfyldte QC-kriterier

18. oktober 2024

Først opslået (Faktiske)

21. oktober 2024

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

24. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

21. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 2025-10900
  • 500464 (Andet bevillings-/finansieringsnummer: Canadian Institutes of Health Research)
  • 2025 (U.S. NIH-bevilling/kontrakt)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

This statement supersedes any such statement in NCT05137119.

For DABI-SNAP, we will provide deidentified individual patient data required to replicate the main manuscript's tables and analyses.

IPD-delingstidsramme

Starting 1 year after the publication of the main trial manuscript for up to 7 years.

IPD-delingsadgangskriterier

Researchers will need to request the data from the corresponding author of the main trial manuscript with an accompanying written proposal for the secondary analysis. Once approved by the trial steering committee, a data sharing agreement will be signed by the responsible parties and the deidentified data set will be provided via a secure transmission.

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • ANALYTIC_CODE

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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