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Physiology and Structure of the Small Airways in Patients With Chronic Airflow Obstruction or COVID-19 (PASSPORT)

2021年1月18日 更新者:Imperial College London
The purpose of this research project is to study small airways physiological function in patients with chronic obstructive lung disease or COVID-19 and explore the relationship with in-vivo microanatomical small airway structure as measured by OCT. Correlating endobronchial assessment with multiple breath nitrogen washout and impulse oscillometry will allow the characterisation of the relationship between small airway structural findings and these validated investigations. A small volume lung wash, endobronchial brushings and the collection of a limited number of endobronchial cryobiopsy samples will be performed to better understand the endobronchial environment of the small airways through inflammatory studies. Following the completion of any such work, residual samples will be stored in a "bio-bank" to enable the completion of future work. Understanding the relationship with symptom-based quality of life scoring questionnaires and a functional assessment of exercise capacity will help elucidate the clinical impact of in-vivo small airways findings.

研究概览

地位

未知

条件

研究类型

观察性的

注册 (预期的)

42

联系人和位置

本节提供了进行研究的人员的详细联系信息,以及有关进行该研究的地点的信息。

学习联系方式

  • 姓名:Christopher M Orton, MBBS
  • 电话号码:8029 02073518029
  • 邮箱:c.orton@rbht.nhs.uk

学习地点

      • London、英国
        • 招聘中
        • The Royal Brompton
        • 接触:

参与标准

研究人员寻找符合特定描述的人,称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

16年 及以上 (孩子、成人、年长者)

接受健康志愿者

不

有资格学习的性别

全部

取样方法

非概率样本

研究人群

Subjects over the age of 16 with either chronic airflow obstruction or COVID-19

描述

Inclusion Criteria:

  1. Age 16 or over
  2. Scheduled for bronchoscopy as part of clinical care or research protocol
  3. No bleeding diathesis or therapeutic anticoagulation
  4. COPD:

    • FEV1/FVC ratio <70% or

Asthma:

  • Diagnosed by standard clinical methods
  • Post-bronchodilator FEV1 ≥60% predicted or COVID-19 infection or previous COVID-19 infection (confirmed as per local guidelines)

Exclusion Criteria:

  1. Unable to provide informed consent
  2. Exacerbation of obstructive airways disease or respiratory infection requiring systemic antibiotics or corticosteroids in the 6 weeks prior to enrolment unless suffering from COVID-19 infection and bronchoscopy is required for clinical reasons
  3. Contra-indications to performing lung function testing

    • Aortic aneurysm >6cm
    • Unstable cardiovascular disease (unstable angina, myocardial infarction or pulmonary embolism <4 weeks prior)
    • Severe aortic stenosis
    • Pneumothorax
    • Cerebral aneurysm
    • Thoracic or abdominal surgery <4 weeks prior
  4. Contra-indications to passing oesophageal balloons

    • Oesophageal ulceration or varices
    • Sinusitis, recent nasal surgery or epistaxis

学习计划

本节提供研究计划的详细信息,包括研究的设计方式和研究的衡量标准。

研究是如何设计的?

设计细节

队列和干预

团体/队列
Chronic Airflow obstruction / COVID-19
Patients with either chronic airflow obstruction of COVID-19

研究衡量的是什么?

主要结果指标

结果测量
措施说明
大体时间
Respiratory resistance at 5Hz - 20Hz (R5-R20) (kPa/l/s) related to airtrapping as determined by quantitative CT (Expiratory phase low attenuation area <856 HU (%LAA <856 HU)
大体时间:Baseline, pre-procedure
Impulse Oscillometry
Baseline, pre-procedure

次要结果测量

结果测量
措施说明
大体时间
Respiratory reactance at 5Hz: X5 (kPa/l/s)
大体时间:Baseline, pre-procedure
Impulse Oscillometry
Baseline, pre-procedure
Reactance area: Ax (kPa/l/s)
大体时间:Baseline, pre-procedure
Impulse Oscillometry
Baseline, pre-procedure
Functional residual capacity by MBNW: FRCgas (L)
大体时间:Baseline, pre-procedure
Multiple Breath Nitrogen Washout
Baseline, pre-procedure
Lung clearance index: LCI
大体时间:Baseline, pre-procedure
Multiple Breath Nitrogen Washout
Baseline, pre-procedure
Ventilation heterogeneity conducting airways: Scond (L/s)
大体时间:Baseline, pre-procedure
Multiple Breath Nitrogen Washout
Baseline, pre-procedure
Ventilation heterogeneity acinar airways: Sacin (L/s)
大体时间:Baseline, pre-procedure
Multiple Breath Nitrogen Washout
Baseline, pre-procedure
Forced expiratory volume in 1 second: FEV1 (L)
大体时间:Baseline, pre-procedure
Spirometry
Baseline, pre-procedure
Forced vital capacity: FVC (L)
大体时间:Baseline, pre-procedure
Spirometry
Baseline, pre-procedure
Total lung capacity: TLC (L)
大体时间:Baseline, pre-procedure
Plethysmography
Baseline, pre-procedure
Residual volume: RV (L)
大体时间:Baseline, pre-procedure
Plethysmography
Baseline, pre-procedure
Functional residual capacity by plethysmography: FRCpleth (L)
大体时间:Baseline, pre-procedure
plethysmography
Baseline, pre-procedure
Airway mean luminal diameter (Dmean)
大体时间:Baseline, during the procedure
Optical Coherence Tomography
Baseline, during the procedure
Airway inner lumen area (Ai)
大体时间:Baseline, during the procedure
Optical Coherence Tomography
Baseline, during the procedure
Airway wall area (Aw), airway wall percentage (Aw%) as determined by [Aw/(Ai + Aw) × 100%]
大体时间:Baseline, during the procedure
Optical Coherence Tomography
Baseline, during the procedure
Air trapping - expiratory phase low attenuation area <856 HU (%LAA <856 HU)
大体时间:Baseline, pre-procedure
Quantitative CT
Baseline, pre-procedure
Modified MRC dyspnoea score
大体时间:Baseline, pre-procedure
Patient reported outcome measure
Baseline, pre-procedure
St George's Respiratory Questionnaire Score
大体时间:Baseline, pre-procedure
Patient reported outcome measure
Baseline, pre-procedure
Asthma-related Quality of Life Questionnaire (AQLQ) (if asthmatic)
大体时间:Baseline, pre-procedure
Patient reported outcome measure
Baseline, pre-procedure
Asthma Control Questionnaire (ACQ) (if asthmatic)
大体时间:Baseline, pre-procedure
Patient reported outcome measure
Baseline, pre-procedure
6-minute walk distance (m)
大体时间:Baseline, pre-procedure
6-minute walk distance (m)
Baseline, pre-procedure

其他结果措施

结果测量
措施说明
大体时间
Exploratory: Inflammatory and pathological studies of airways brush, wash and cryobiopsy samples
大体时间:Baseline, during the procedure
Laboratory based scientific studies
Baseline, during the procedure

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查,以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (实际的)

2019年8月23日

初级完成 (预期的)

2021年8月22日

研究完成 (预期的)

2022年2月2日

研究注册日期

首次提交

2020年7月2日

首先提交符合 QC 标准的

2021年1月18日

首次发布 (实际的)

2021年1月20日

研究记录更新

最后更新发布 (实际的)

2021年1月20日

上次提交的符合 QC 标准的更新

2021年1月18日

最后验证

2021年1月1日

更多信息

与本研究相关的术语

其他研究编号

  • 18IC4688

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