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TransThoracic Ultrasound for Descending Aortic Aneurysms (THORUS)

2026년 8월 3일 업데이트: Imperial College London

Feasibility, Accuracy and Reproducibility of Ultrasound in Aneurysms of the Descending Thoracic Aorta

The goal of this observational study is to assess the applicability of non-invasive ultrasound in aneurysms of the descending thoracic aorta.

The main question it aims to answer is:

What is the feasibility of Ultrasound to visualise the Descending Thoracic Aorta, and can this imaging modality accurately measure the maximum size of aneurysms and residual sacs with acceptable reproducibility?

Participants are having their diagnosis confirmed or excluded by conventional imaging techniques (CT scans). Participants receive exactly the same standard of care regardless of their participation. The study offers an additional ultrasound scan, and the results will be compared with previous imaging.

연구 개요

상태

아직 모집하지 않음

정황

상세 설명

Aneurysms of the aortic artery are a significant public health issue. The number of newly diagnosed aneurysms of the thoracic aorta is on the rise, and aneurysm rupture is a catastrophic event associated with high mortality rates. The most proximal sections of the aorta (ascending and the aortic arch) are routinely scanned by echocardiography practitioners. The abdominal aorta is also easily visualised on transabdominal ultrasound, and there is a screening programme in the UK that is highly cost-effective and reduced the aneurysm-related number of deaths. However, the portion of the aorta in the chest (descending thoracic aorta) is not routinely assessed by ultrasound practitioners.

The diagnosis of descending thoracic aneurysms relies mostly on imaging techniques that use ionising radiation. In addition, these techniques are expensive and may not be widely available in some regions. In contrast, ultrasound is a non-invasive technique that allows visualisation of most parts of the body. Ultrasound machine suppliers have invested in better systems and transducers over the years and visualisation of the descending thoracic aorta may now be possible.

The main aims of this study are to assess the feasibility (Part 1), accuracy (Part 2) and reproducibility (Part 3) ultrasound in the diagnosis and monitoring of descending thoracic aortic aneurysms. Participants will be recruited from the vascular lab and outpatient clinics, and diameters of the descending thoracic aorta will be measured with non-invasive ultrasound. Data obtained from study measurements will be compared with computed tomography scans that patients had as part of their standard of care.

If the feasibility, accuracy and reproducibility of Ultrasound are clearly demonstrated, routine ultrasound scans of the descending thoracic aorta may be suggested.

연구 유형

관찰

등록 (추정된)

60

연락처 및 위치

이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.

연구 연락처

  • 이름: Carlos Pinho, PhD Student
  • 전화번호: +44 20 3312 3374
  • 이메일: cv1026@ic.ac.uk

연구 연락처 백업

연구 장소

  • 영국
    • London
      • London, London, 영국, W2 1NY
        • Imperial College Healthcare NHS Trust - St Mary's Hospital
        • 연락하다:
          • Carlos Pinho, PhD Student
          • 전화번호: +44 20 3312 3374
          • 이메일: cv1026@ic.ac.uk
        • 연락하다:
        • 수석 연구원:
          • Carlos Pinho, PhD Student

참여기준

연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.

자격 기준

공부할 수 있는 나이

  • 성인
  • 고령자

건강한 자원 봉사자를 받아들입니다

예

샘플링 방법

비확률 샘플

연구 인구

All Participants will receive a single Ultrasound scan as part of this study. All Patients had at least one CT scan of the thoracic aorta prior to the study as part of their standard of care. No additional radiation or invasive imaging techniques will be used in the Thorus study. The data obtained from the CT will be analysed by an independent reviewer and compared with Ultrasound measurements. Participants will be recruited prospectively from a single NHS Trust in London - Imperial College Healthcare NHS Trust.

설명

Inclusion Criteria:

  • Patients with diagnosed AAA or other vascular condition attending the vascular scanning department for routine ultrasound and confirmed healthy DTA (Control group).
  • Patients with known DTAA (including Type B dissection) or patients who had TEVAR previously (Case group).
  • Patients who have had CT as part of their standard of care.
  • Patients able to tolerate the scan (Lying in supine position).
  • Adults aged 18 or over.
  • Willing to provide consent.

Exclusion Criteria:

  • Patient under 18 years of age.
  • Previous thoracic surgery or body deformity (severe kyphosis, scoliosis, pleural effusion or chest wall trauma).
  • Patients without previous imaging of the thoracic aorta.
  • Life expectancy <2 years.
  • Pregnant Women.
  • Patients unwilling to provide consent or unable to comply with study requirements.
  • Patients too frail to travel to routine outpatient appointments.
  • Inability to attend the appointment due to time constraints or other commitments.
  • Although rare, ultrasound contraindications as described in the scanning protocol are also exclusion criteria.

공부 계획

이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.

연구는 어떻게 설계됩니까?

디자인 세부사항

코호트 및 개입

그룹/코호트
CONTROLS
Patients with healthy DTA (30 patients)
CASES
Patients with DTAA or TEVAR (30 patients)

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정
측정값 설명
기간
Part 1 - Feasibility - Proportion of participants with successful ultrasound measurement of the diameter of the descending thoracic aorta
기간: Day 1 - At the single ultrasound study visit.
Number and percentage of participants in whom the descending thoracic aortic diameter can be obtained by transthoracic ultrasound. The units of Measure are total number and percentages.
Day 1 - At the single ultrasound study visit.
Part 1 - Feasibility - Length of the descending thoracic aorta by Ultrasound
기간: Day 1 - At the single ultrasound study visit.
Total length of the descending thoracic aorta from the aortic isthmus to the coeliac axis. The unit of Measure is Centimetres (cms).
Day 1 - At the single ultrasound study visit.
Part 1 - Feasibility - Ultrasound Quality Score
기간: Day 1 - At the single ultrasound study visit.

Number of ultrasound windows that allow visualisation of the descending thoracic aorta (0 to 3 windows) and allocation of a quality score.

The Unit of Measure is a score created for this study (0-Windows: No views; 1 window: Poor; 2 windows: Moderate; 3 windows: Good). Higher scores mean better image quality.
Day 1 - At the single ultrasound study visit.
Part 2 - Accuracy - Comparision between Transthoracic Ultrasound and CT
기간: Day 1 - At the single ultrasound study visit.
Calculate mean differences and limits of agreement between TUS and CT. Achieve high sensitivity and specificity.
Day 1 - At the single ultrasound study visit.
Part 3 - Reproducibility - Intraclass correlation coefficient
기간: Day 1 - At the single ultrasound study visit.
Calculate inter- and intra-operator variability by intraclass correlation coefficient (ICC). The study aims to achieve good or excellent reliability.
Day 1 - At the single ultrasound study visit.

2차 결과 측정

결과 측정
측정값 설명
기간
Part 1 - Feasibility - Factors limiting visualisation of the Descending Thoracic Aorta
기간: Day 1 - At the single ultrasound study visit.
Number and percentages of participants in whom limiting factors such as body habitus or rib shadowing are reported after the ultrasound test. The units of measure are the number of participants with raised BMI (kg/m^2) and acoustic shadowing due to bone density.
Day 1 - At the single ultrasound study visit.
Part 1 - Feasibility - Duration of Ultrasound Examination
기간: Day 1 - At the single ultrasound study visit.
Total time needed to complete the ultrasound scan of the descending thoracic aorta. The unit of measure is minutes.
Day 1 - At the single ultrasound study visit.
Part 1 - Feasibility - Patient Feedback Questionnaire
기간: Day 1 - At the single ultrasound study visit.
Scores are obtained from the patient feedback questionnaire that was created specifically for this study and consists of 5 questions relating to comfort, tolerability and overall experience of the ultrasound scan. The unit of measure is a score ranging from 1-Strongly Disagree to 5-Strongly Agree. Higher scores mean better patient satisfaction.
Day 1 - At the single ultrasound study visit.

공동 작업자 및 조사자

여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.

스폰서

Imperial College London

수사관

  • 연구 의자: Professor Colin Bicknell, Imperial College London

연구 기록 날짜

이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.

연구 주요 날짜

연구 시작 (추정된)

2026년 9월 7일

기본 완료 (추정된)

2027년 4월 5일

연구 완료 (추정된)

2028년 4월 3일

연구 등록 날짜

최초 제출

2026년 7월 28일

QC 기준을 충족하는 최초 제출

2026년 8월 3일

처음 게시됨 (실제)

2026년 8월 7일

연구 기록 업데이트

마지막 업데이트 게시됨 (실제)

2026년 8월 7일

QC 기준을 충족하는 마지막 업데이트 제출

2026년 8월 3일

마지막으로 확인됨

2026년 8월 1일

추가 정보

이 연구와 관련된 용어

기타 연구 ID 번호

  • 199470
  • IRAS Project ID: 365629 (기타 식별자: NHS Health Research Authority)

개별 참가자 데이터(IPD) 계획

개별 참가자 데이터(IPD)를 공유할 계획입니까?

아니요

IPD 계획 설명

Sharing IPD is not required to answer the research question.

약물 및 장치 정보, 연구 문서

미국 FDA 규제 의약품 연구

아니

미국 FDA 규제 기기 제품 연구

아니

이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .

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