Effect of a Global Simplified Strategy on Thromboembolic Events in Emergency Department Patients With Suspected Pulmonary Embolism

Pulmonary Embolism Clinical Trial

— MODS STRATEGY  

Official title:

Effect of a Global Simplified Strategy on Thromboembolic Events in Emergency Department Patients With Suspected Pulmonary Embolism

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT06190392
• Other study ID #: APHP230886
• Secondary ID: 2023-A01956-39
• Status: Not yet recruiting
• Phase: N/A
• Start date: January 2024
• Est. completion date: December 2024

Study information

• Verified date: December 2023
• Source: Assistance Publique - Hôpitaux de Paris
• Contact: Héloïse BANNELIER, MD, MSc
• Phone: +33685187582
• Email: heloise.bannelier[@]aphp.fr
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Pulmonary embolism (PE) is frequently suspected in emergency departments (ED) patients which often leads to the prescription of DDimer testing and irradiative chest imaging (Computed Tomographic Pulmonary Angiogram CTPA in most cases).[1] Indeed, an increased use of CTPA has been reported without clear benefit in terms of prognosis.This increased use is reportedly associated with potential overdiagnosis of PE, increased cost, length of ED stay, and side effects from both chest imaging and undue anticoagulant treatments. The standard diagnostic strategy for PE work up includes three steps with an initial evaluation of clinical probability, followed by D-dimer testing if indicated, followed by chest imaging if necessary

• Computed tomographic pulmonary angiogram CTPA being the imaging modality of choice.

A large European prospective study has reported that the use of CTPA has constantly increased without change in the diagnostic yield. In order to reduce the use of CTPA, it has been validated that in patients with a low likelihood of PE, the D-dimer threshold for ordering CTPA can be raised at 1000 ng/ml. It has been validated that a low likelihood of PE can be determined either with the YEARS or the PEGeD clinical decision rules. These latter two include one common item being "Is PE the most likely diagnosis". A retrospective cohort study of 3330 patients reported that using this sole question of "Is PE the most likely diagnosis" can be safely used to raise the D-dimer threshold to 1000 ng/ml, and that this performs as well as YEARS and PEGeD. This simple question is easier to use by emergency physicians compared to complex ones, which are reportedly seldom used by emergency physicians. Therefore, the validation of the "PE unlikely" simple and straightforward decision rule could increase physicians' adherence and therefore limit the use of chest imaging.

The hypothesis of this prospective study is that the likelihood of PE assessed to elevate the DDimer threshold to 1000 ng/ml can be estimated by the sole question of "is PE the most likely diagnosis", and to validate a global simplified diagnostic strategy for PE in the ED.

The intervention will be the patient's management with a simplified global strategy. Whether PE is the most likely diagnostic will be assessed by the unstructured implicit clinician's estimation.

In patient with a clinical suspicion of pulmonary embolism: DDimer testing will be performed.

If the likelihood of PE is low (PE is not the most likely diagnosis), then threshold for DDimer testing will be 1000 ng/ml. If the likelihood of PE is high (PE is the most likely diagnosis), then the age-adjusted DDimer threshold will be applied.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 1064
• Est. completion date: December 2024
• Est. primary completion date: December 2024
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Age = 18 years

• ED adult patients with suspected pulmonary embolism defined as:

• New onset of or worsening shortness of breath

• Or Chest pain

• Or Syncope in the absence of any obvious other cause (such as pneumothorax, asthma attack, ST elevation myocardial infarction, trauma, etc.)

• Patient able to understand and give oral consent

• Informing and obtaining the patient's oral consent

• Social security affiliation (except AME)

Exclusion Criteria:

• Patients currently treated with full-dose anticoagulant therapy

• Diagnosed thrombo-embolic event in the past 6 months

• PE ruled out by the PERC rule (low clinical probability and none of the 8 items of the PERC score)

• Acute severe presentation (clinical signs of respiratory distress, hypotension, SpO2 < 90%, shock)

• DDimer level known before ED visit

• Patient living in assisted-living home or nursing home or palliative center. Anticipated life expectancy < 3 months or "do not resuscitate" order

• Patient under legal protection measure (tutorship or curatorship) and patient deprived of freedom

• Pregnancy and breastfeeding

• Participation in another interventional trial

Related Conditions & MeSH terms

• Embolism
• Emergencies
• Pulmonary Embolism
• Thromboembolism

Intervention

Other:
• MODS Modified simplified diagnostic strategy
The intervention will be the patient's management with a simplified global strategy. Whether PE is the most likely diagnostic will be assessed by the unstructured implicit clinician's estimation. In patient with a clinical suspicion of pulmonary embolism: DDimer testing will be performed. If the likelihood of PE is low (PE is not the most likely diagnosis), then threshold for DDimer testing will be 1000 ng/ml. If the likelihood of PE is high (PE is the most likely diagnosis), then the age-adjusted DDimer threshold will be applied.

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Assistance Publique - Hôpitaux de Paris

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	The failure proportion of the diagnostic strategy, defined as a diagnosed thrombo-embolic event at 3 months follow-up (either a PE or a deep venous thrombosis), among patients in whom PE was initially ruled out.		3 months
Secondary	Pulmonary embolism		3 months
Secondary	Deep venous thrombosis		3 months
Secondary	CTPA or V/Q scan ordered by ED physicians		3 months
Secondary	Type of PE (lobar, segmental, sub-segmental)		3 months
Secondary	Hospital admission following the ED visit		3 months
Secondary	Anticoagulant therapy administration,		3 months
Secondary	All-cause mortality		3 months
Secondary	All-cause readmissions at 3 months		3 months