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Ultra-low Dose Chest Computed Tomography: a Rule-out Tool for Community-acquired Pneumonia

Ultra-low Dose Chest Computed Tomography: a Rule-out Tool for Community-acquired Pneumonia

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT04541160
Enrollment
237
Registered
2020-09-09
Start date
2017-10-01
Completion date
2018-12-01
Last updated
2020-09-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Diagnoses Disease, Pneumonia

Keywords

pneumonia

Brief summary

This is a randomized study that sought to compare the rule-out capacity and antibiotics prescriptions associated with two different diagnostic imaging strategies (ultra-low-dose chest computed tomography versus chest radiography) in a group of healthy adults presenting to the emergency department (ED) with suspected community-acquired pneumonia (CAP).

Detailed description

Between October 2017 and December 2018, we prospectively enrolled consecutive adult patients with suspected community-acquired pneumonia based on at least one respiratory symptom and focal auscultatory findings and at least one sign related to infection, for whom no definitive diagnosis was possible by clinical judgment. Eligible patients were randomly assigned to their imaging evaluation in a 1:1 ratio to either ultra-low-dose chest computed tomography (ULDCT) or the standard evaluation strategy using conventional chest radiography (CR). This study sought to compare the rule-out capacity and antibiotics prescriptions associated with those two different diagnostic imaging strategies (ULDCT versus CR) in a group of healthy adult patients presenting to the ED with suspected CAP.

Interventions

DIAGNOSTIC_TESTCR

Lung imaging evaluation performed with CR

DIAGNOSTIC_TESTULDCT

Lung imaging evaluation performed with ULDCT

Sponsors

Fundação de Amparo à Pesquisa do Estado de São Paulo
CollaboratorOTHER_GOV
Hospital Israelita Albert Einstein
Lead SponsorOTHER

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Suspected CAP; * At least one respiratory symptom (new or increasing cough, expectoration, dyspnea or chest pain) and * At least one symptom related to infection (fever ≥ 38°C, chills, sweating, myalgia, mental confusion or headache) and * Focal auscultatory findings during physical examinations (crackling rales) * No definitive diagnosis possible by clinical judgment.

Exclusion criteria

* Score in at least one clinical part of the CURB-65 or PSA scores * Clinical diagnosis of rhinosinusitis and acute nasopharyngitis and who had already been treated with antimicrobial therapy for this episode of disease * pregnancy; * the presence of other respiratory diseases such as chronic obstructive pulmonary disease (COPD), asthma, interstitial lung disease, chronic diseases or other chronic airway conditions; * diagnosis of congestive heart failure; * body mass index (BMI) greater than 30; * inability to hold the breath for at least 10 seconds

Design outcomes

Primary

MeasureTime frameDescription
Community-acquired pneumonia rule-out capability1 monthNumber of Participants for whom ULDCT could diagnose absence of imaging signs of pneumonia
Antibiotics prescriptionimmediateNumber of Participants for whom antibiotics were prescribed to treat bacterial pneumonia

Countries

Brazil

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026