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Study identifier: NCT04263038 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Clinical Surveillance vs. Anticoagulation for Low-risk Patients With Isolated Subsegmental Pulmonary Embolism

Condition: Pulmonary Embolism · Embolism · Embolism and Thrombosis  ·  Sponsor: Drahomir Aujesky

PhasePhase 4
Planned participants276
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

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.

This description comes directly from the study's public registry record.

Talk to the study team

Drahomir Aujesky, Prof. MD MSc  ·  +41 31 632 88 84  ·  SAFE-SSPE@insel.ch

Tobias Tritschler, Dr. MD MSc  ·  +41 31 63 2 01 46  ·  SAFE-SSPE@insel.ch

Always discuss trial participation with your own doctor first.

Locations (40)

Cliniques Universitaires Saint-LucWoluwe-Saint-Lambert, Brussels Capital, BelgiumRecruiting
Centre hospitalier universitaire de LiegeLiège, BelgiumRecruiting
The Ottawa HospitalOttawa, CanadaRecruiting
Hôpital Bicêtre - APHPLe Kremlin-Bicêtre, Le Kremlin-Bicêtre, FranceRecruiting
Centre Hospitalier Regional Et Universitaire De BrestBrest, FranceRecruiting
CHU Gabriel-MontpiedClermont-Ferrand, FranceRecruiting
Centre Hospitalier Universitaire De DijonDijon, FranceRecruiting
Hospital Edouard HerriotLyon, FranceRecruiting
Hôpitaux universitaires de Marseille Timone AP-HMMarseille, FranceRecruiting
CHU De RouenRouen, FranceRecruiting
CHU ST Etienne - Hôpital NordSaint-Priest-en-Jarez, FranceRecruiting
Albert Schweitzer Ziekenhuis DordrechtDordrecht, NetherlandsRecruiting

+ 28 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT04263038