- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04263038
Clinical Surveillance vs. Anticoagulation for Low-risk Patients With Isolated Subsegmental Pulmonary Embolism (SAFE-SSPE)
September 27, 2023 updated by: Drahomir Aujesky
Clinical Surveillance vs. Anticoagulation for Low-risk Patients With Isolated Subsegmental Pulmonary Embolism: a Multicenter Randomized Placebo-controlled Non-inferiority Trial
The clinical significance of pulmonary embolism (PE) limited to the subsegmental pulmonary arteries, so called isolated subsegmental pulmonary embolism (SSPE), remains controversial.
Whether isolated SSPE represents "true" PE, a clinically more benign form of PE, a physiologic lung clearing process, or a false positive result (artifact) is currently unclear and hence, whether patients with isolated SSPE benefit from anticoagulant treatment is uncertain.
Despite growing evidence from observational studies that withholding anticoagulation may be a safe option in selected patients with isolated SSPE (i.e., those without concomitant deep vein thrombosis, cancer, etc.), most patients with isolated SSPE receive anticoagulant treatment, which is associated with an increased risk of bleeding.
The overall objective of the randomized controlled SAFE-SSPE trial is to evaluate the efficacy and safety of clinical surveillance without anticoagulation compared to anticoagulation treatment in low-risk patients with isolated SSPE.
Study Overview
Status
Recruiting
Conditions
Intervention / Treatment
Study Type
Interventional
Enrollment (Estimated)
276
Phase
- Phase 4
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Drahomir Aujesky, Prof. MD MSc
- Phone Number: +41 31 632 88 84
- Email: SAFE-SSPE@insel.ch
Study Contact Backup
- Name: Tobias Tritschler, Dr. MD MSc
- Phone Number: +41 31 63 2 01 46
- Email: SAFE-SSPE@insel.ch
Study Locations
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Ottawa, Canada
- Recruiting
- The Ottawa Hospital
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Contact:
- Marc Carrier, Prof. MD MSc
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Brest, France
- Recruiting
- Centre Hospitalier Régional et Universitaire de Brest
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Contact:
- Francis Couturaud, Prof. MD
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Den Haag, Netherlands
- Recruiting
- Haaglanden Medisch Centrum
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Contact:
- H.M. A. Hofstee, MD
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Dordrecht, Netherlands
- Recruiting
- Albert Schweitzer Ziekenhuis Dordrecht
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Contact:
- P.E. Westerweel, MD
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Enschede, Netherlands
- Recruiting
- Medisch Spectrum Twente
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Contact:
- H.P.A.A. van Veen, MD
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Leiden, Netherlands
- Recruiting
- Leiden University Medical Center
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Contact:
- F. A. Klok, Prof. MD PhD
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Rotterdam, Netherlands
- Recruiting
- Erasmus Universitair Medisch Centrum
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Contact:
- M. Kruip, MD
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Zwolle, Netherlands
- Recruiting
- Isala Klinieken Zwolle
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Contact:
- M. F. Boosma, MD
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Baden, Switzerland
- Recruiting
- Cantonal hospital of Baden
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Contact:
- Maria Wertli, Prof. MD
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Basel, Switzerland
- Recruiting
- University Hospital of Basel
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Contact:
- Roland Bingisser, Prof. MD
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Bern, Switzerland, 3010
- Recruiting
- University Hospital Inselspital
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Contact:
- Drahomir Aujesky, Prof. MD MSc
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Bern, Switzerland
- Recruiting
- Tiefenau Hospital
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Contact:
- Manfred Essig, Prof. MD
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Burgdorf, Switzerland
- Recruiting
- Regional Hospital of Emmental
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Contact:
- Robert Escher, PD Dr. MD
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Delémont, Switzerland
- Recruiting
- Hospital of Delémont
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Contact:
- Hervé Duplain, PD Dr. MD
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Fribourg, Switzerland
- Recruiting
- Cantonal Hospital of Fribourg
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Contact:
- Julien Vaucher, Prof. MD
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Geneva, Switzerland
- Recruiting
- Geneva University Hospital
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Contact:
- Marc Righini, Prof. MD
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Lucerne, Switzerland
- Recruiting
- Cantonal Hospital of Lucerne
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Contact:
- Christoph Henzen, Prof. MD
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Neuchâtel, Switzerland
- Recruiting
- Hospital of Neuchâtel
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Contact:
- Jacques Donzé, Prof. MD MSc
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Zürich, Switzerland
- Recruiting
- University Hospital Zurich
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Contact:
- Ksenija Slankamenac, PD, MD, PhD
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Zürich, Switzerland
- Recruiting
- Triemli Hospital
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Contact:
- Lars Huber, PD MD
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Aargau
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Aarau, Aargau, Switzerland
- Recruiting
- Cantonal Hospital of Aarau
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Contact:
- Philippe Schütz, Prof. MD MPH
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Basel
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Liestal, Basel, Switzerland
- Recruiting
- Cantonal Hospital of Liestal
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Contact:
- Jörg Leuppi, Prof. MD PhD
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Bern
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Bienne, Bern, Switzerland
- Recruiting
- Hospital of Bienne
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Contact:
- Daniel Genné, Prof. MD
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Saint Gallen
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St. Gallen, Saint Gallen, Switzerland
- Recruiting
- Cantonal Hospital of St. Gallen
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Contact:
- Claudio S. Rüegg, MD
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Solothurn
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Olten, Solothurn, Switzerland
- Recruiting
- Cantonal Hospital of Olten
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Contact:
- Lukas Zimmerli, PD MD EMBA
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Thurgau
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Frauenfeld, Thurgau, Switzerland
- Recruiting
- Cantonal Hospital of Frauenfeld
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Contact:
- Andreas Kistler, PD MD
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Valais
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Sion, Valais, Switzerland
- Recruiting
- Hospital of Sion
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Contact:
- Pierre-Auguste Petignat, Prof. MD
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Vaud
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Lausanne, Vaud, Switzerland
- Recruiting
- University Hospital of Lausanne
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Contact:
- Marie Méan, MD MER
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Nyon, Vaud, Switzerland
- Recruiting
- Hospital of Nyon
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Contact:
- Mallory Moret Bochatay, MD
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Zurich
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Winterthur, Zurich, Switzerland
- Recruiting
- Cantonal Hospital of Winterthur
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Contact:
- Reinhard Imoberdorf, MD
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Description
Inclusion Criteria:
- Informed Consent as documented by signature
- Age ≥18 years
- Objective diagnosis of symptomatic or asymptomatic isolated SSPE
Exclusion Criteria:
- Presence of leg deep vein thrombosis (DVT) or upper extremity DVT (subclavian vein or above)
- Active cancer, defined as cancer treated with surgery, chemotherapy, radiotherapy, or palliative care during the last 6 months
- ≥1 prior episode of unprovoked VTE (absence of a transient or permanent risk factor)
- Clinical instability (systolic blood pressure <100 mm Hg or arterial Oxygen saturation <92% at ambient air) at the time of presentation
- Active bleeding or at high risk of bleeding
- Severe renal failure (creatinine clearance <30ml/min)
- Severe liver insufficiency (Child-Pugh B or C)
- Concomitant use of strong CYP3A4 inhibitors or strong CYP3A4 inducers
- Known hypersensitivity to rivaroxaban
- Need for therapeutic anticoagulation for another reason
- Therapeutic anticoagulation for >72 hours for any reason at the time of screening
- Hospitalized for >72 hours prior to the diagnosis of isolated SSP (hospital-acquired VTE)
- Known pregnancy or breast feeding (pregnancy test to be performed for women of childbearing potential)
- Lack of safe contraception in women of childbearing potential
- Refusal or inability to provide informed consent
- Prior enrolment in this trial
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Anticoagulation
Patients in the anticoagulation group will receive rivaroxaban 15 mg twice daily for the first 21 days, followed by 20 mg once daily for an overall treatment duration of 90 days.
|
Anticoagulation
|
Placebo Comparator: No anticoagulation
Patients in the group without anticoagulation will receive placebo twice daily for the first 21 days, followed by one tablet daily for an overall treatment duration of 90 days.
|
Study drug without active agent
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Recurrent venous thromboembolism
Time Frame: Within 90 days of randomization
|
Proportion of recurrent, clinically symptomatic, objectively confirmed venous thromboembolism (defined as recurrent fatal or nonfatal pulmonary embolism or lower limb deep vein thrombosis)
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Within 90 days of randomization
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Clinically significant bleeding
Time Frame: Within 90 days of randomization
|
Proportion of the composite of major and clinically relevant non-major bleeding
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Within 90 days of randomization
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All-cause mortality
Time Frame: Within 90 days of randomization
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Proportion of deaths (all causes of death will be considered)
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Within 90 days of randomization
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Health-related quality of life
Time Frame: Within 90 days of randomization
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Pulmonary embolism related quality of life as assessed by the Pulmonary Embolism Quality of Life (PEmb-QoL) questionnaire
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Within 90 days of randomization
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Functional status
Time Frame: Within 90 days of randomization
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Functional status as assessed by the post-venous thromboembolism functional status scale
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Within 90 days of randomization
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Initial length of stay (LOS)
Time Frame: Within 90 days of randomization
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Defined as the time/date of discharge minus time/date of admission at the emergency department
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Within 90 days of randomization
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Subsequent overall hospitalizations
Time Frame: Within 90 days of randomization
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Number of overall hospitalizations
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Within 90 days of randomization
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Emergency departments and physician outpatient visits
Time Frame: Within 90 days of randomization
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Number of emergency department and physician outpatient visits
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Within 90 days of randomization
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Return to work or usual activities
Time Frame: Within 90 days of randomization
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Time (days) to return to work in workers and usual activities (household) in non-workers
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Within 90 days of randomization
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Study Director: Drahomir Aujesky, Prof. MD MSc, Inselspital, Bern University Hospital, University of Bern
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
May 15, 2020
Primary Completion (Estimated)
February 1, 2024
Study Completion (Estimated)
April 1, 2024
Study Registration Dates
First Submitted
February 4, 2020
First Submitted That Met QC Criteria
February 6, 2020
First Posted (Actual)
February 10, 2020
Study Record Updates
Last Update Posted (Actual)
September 28, 2023
Last Update Submitted That Met QC Criteria
September 27, 2023
Last Verified
September 1, 2023
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Pathologic Processes
- Vascular Diseases
- Cardiovascular Diseases
- Lung Diseases
- Embolism
- Hemorrhage
- Thrombosis
- Thromboembolism
- Venous Thromboembolism
- Pulmonary Embolism
- Respiratory Tract Diseases
- Embolism and Thrombosis
- Molecular Mechanisms of Pharmacological Action
- Enzyme Inhibitors
- Protease Inhibitors
- Factor Xa Inhibitors
- Antithrombins
- Serine Proteinase Inhibitors
- Anticoagulants
- Rivaroxaban
Other Study ID Numbers
- 2019-02297
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
YES
IPD Plan Description
After publication of the study results, a de-identified patient-level data set relating to the primary publication along with the latest version of the study protocol, the informed consent form, the statistical analysis plan, the code used for the analyses, and the Data Management and Quality Plan describing all data management aspects of the study will be made publicly available for replication of the study results and secondary data analyses in the Bern Open Repository and Information System (BORIS) Research Data, an online non-commercial data repository that meets Swiss National Science Foundation requirements for FAIR Data Principles (www.force11.org/group/fairgroup/fairprinciples)
IPD Sharing Time Frame
After publication of the study results
IPD Sharing Access Criteria
Data will be publicly available for replication of the study results and secondary data analyses in the Bern Open Repository and Information System (BORIS) Research Data
IPD Sharing Supporting Information Type
- STUDY_PROTOCOL
- SAP
- ICF
- ANALYTIC_CODE
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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