NCT04549636

COVID-19 Related Lung Ventilation and Perfusion Injury

Prospective Longitudinal Study to Characterize and Understand the Clinical Relevance of SARS-CoV2 Related Ventilation and Perfusion Injury Evaluated by V/Q SPECT-CT in an Asthmatic and Healthy Population

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 42 (actual)
• Sponsor: McMaster University · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

Little is currently known about the immediate and long-term effect of COVID-19 on lung ventilation (delivery of air to the lungs) and lung perfusion (delivery of blood to the lungs). Some people who survive COVID-19 may have lung ventilation and/or perfusion injury that persists following COVID-19 recovery. This lung injury may be related to inflammation in the lung, breathlessness, exercise limitation and reduced quality of life. Therefore, towards the goal of understanding the effects of COVID-19 on lung health, the purpose of this study is to characterize and understand the clinical relevance of COVID-19 related lung ventilation and perfusion injury and associated inflammatory status, ≤4 weeks and 6-months following COVID-19 recovery in an asthmatic and healthy population. To do this, an asthmatic and healthy population who have, and have not, been previously diagnosed with COVID-19 will be studied.

Conditions

• Covid-19
• Asthma
• Healthy

Interventions

Type	Name	Description
OTHER	V/Q SPECT-CT	At visits 1 and 2, ventilation will be assessed by 99mTc Technegas SPECT ventilation scan and perfusion will be assessed by 99mTc Macroaggregated Albumin SPECT perfusion scan.
OTHER	St. George's Respiratory Questionnaire (SGRQ)	At visits 1 and 2, quality of life will be evaluated using the St. George's Respiratory Questionnaire (SGRQ).
OTHER	mMRC (Modified Medical Research Council) Dyspnea Scale	At visits 1 and 2, dyspnea will be evaluated using the mMRC (Modified Medical Research Council) Dyspnea Scale.
OTHER	Six-minute walk test (6MWT)	At visits 1 and 2, exercise capacity will be evaluated using the six-minute walk test (6MWT).
OTHER	Spirometry	At visits 1 and 2, spirometry will be performed to quantify the forced expiratory volume in one second (FEV1), the forced vital capacity (FVC) and FEV1/FVC.
OTHER	Plethysmography & DLCO	At visits 1 and 2, plethysmography and the diffusing capacity of the lung for carbon monoxide (DLCO) will be performed.
OTHER	Airwave Oscillometry	At visits 1 and 2, airwave oscillometry will be performed to obtain resistance (R) and reactance (X) at 5 Hz (R5) and 19 Hz (R19). The resonance frequency (fres), area above the reactance curve (AX) and the heterogeneity of obstruction (R5-19) will be derived from R and X.

Timeline

• Start date: 2020-10-18
• Primary completion: 2022-01-26
• Completion: 2022-01-26
• First posted: 2020-09-16
• Last updated: 2025-08-14

Locations

1 site across 1 country: Canada