Covid19 Clinical Trial
Official title:
Multicentric Evaluation of the Impact on Hypoxia Sensitivity of Patients With COVID-19
Verified date | March 2024 |
Source | Institut de Formation et de Recherche en Médecine de Montagne |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Interventional |
In this study, the investigators will examine the extent to which having suffered coronavirus disease 2019 (COVID19) impacts one's sensibility to hypoxia by means of the 'Richalet test'. The aim of the study is to formulate recommendations for advice in altitude mountain medicine for patients having suffered COVID19. To determine any eventual changes in response to hypoxia, performances by participants having suffered COVID-19 and participants having stayed free of COVID-19 will be both compared intra-individually with previous performances (pre-COVID-19 pandemic) and between both groups of subjects. The investigators hypothesize that patients having suffered COVID19 might perform differently on the cardiopulmonary exercise test compared to before the illness. Based on recent research on COVID19 pathophysiology and -patient follow-up, it might be expected that COVID19 alters the response to hypoxia, thus influencing one's acclimatization capabilities at high altitude, albeit reversibly and/or temporarily. Different alterations of response to hypoxia could be observed. The virus causing COVID19, the "severe acute respiratory syndrome coronavirus 2" (SARS-CoV-2), has the potential to significantly damage the nervous system and to affect cardiorespiratory functions. If SARS-CoV-2 does, similarly to MERS and SARS, induce cardiorespiratory and neurological dysfunction, then COVID19 patients may have impaired hypoxia response after infection and perform worse on the 'Richalet test' in comparison to before the illness. Conversely, reports of high prevalence of dyspnea in patients up to 3 months after SARS-CoV-2 infection, might indicate infection-induced degenerative changes in the carotid bodies, which might lead to sensibilization of the peripheral chemoreceptors to impaired oxygenation. Possibly similar to the impact of aging and smoking on the cardiorespiratory response to hypoxia, this phenomenon of sensibilization could entail an increased hypoxic response in patients having suffered COVID-19. Accordingly, patients might perform better on the 'Richalet test' post-COVID-19 than they did before.
Status | Completed |
Enrollment | 68 |
Est. completion date | November 2, 2021 |
Est. primary completion date | November 2, 2021 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | All |
Age group | 18 Years and older |
Eligibility | Inclusion Criteria: - Subject having suffered COVID19 in the 12 months before inclusion, attested by a positive PCR, positive serology test or positive chest CT scan. (COVID+ group). - Subject having stayed clear of COVID19 (COVID-/control group). - Subject having been well informed and having provided written informed consent before participation. - Subject covered by social security of some sort. - Subject with an oxygen saturation of SpO2 > 95% in ambient air on day of Richalet test performance. - Subject presenting with no symptoms of COVID19 (anymore) on the day of the experiment. - Subject having already performed the Richalet hypoxia exercise test as part of the altitude mountain consultation in the years 2015 to 2019 in any of the 13 hospital centers participating at the study. Exclusion Criteria: - Subject with a history of respiratory, cardiovascular, neuromuscular, metabolic or renal pathologies. - Subject with a history of psychiatric or behavioral disorder. - Subject covered by L1121-5 to L1121-8 sections of the Public Health regulations (Code de la Santé Publique). - Subject under guardian- or curatorship. - Subject without social insurance. - Subjet under the age of 18. - Subject refusing to participate in the study. - Subject diagnosed with an infection by a pathogen other than SARS-CoV-2. |
Country | Name | City | State |
---|---|---|---|
France | Institut de Formation et de Recherche en Médecine de Montagne (IFREMMONT) | Chamonix-Mont-Blanc | Auvergne-Rhône-Alpes |
Lead Sponsor | Collaborator |
---|---|
Institut de Formation et de Recherche en Médecine de Montagne | Ecole Nationale des Sports de Montagne, University of Paris 13 |
France,
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* Note: There are 36 references in all — Click here to view all references
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | desaturation induced by hypoxia at exercise (?SaO2) | ?SaO2, HCRe and HVRe are considered to be indirect measurements of the chemosensitivity and response to hypoxia. HCRe and HVRe are calculated from the ratio of respective increased parameters (CF and RR) over the decrease in arterial oxygen saturation measured in 5 consecutive phases of the hypoxic exercise test. | Continuous measuring during the entirety of the hypoxia exercise test over a period of time of around 30 min with cornerstone measurements every 4 min. | |
Primary | hypoxic cardiac response at exercise (HCRe) | See description outcome 1 | Continuous measuring during the entirety of the hypoxia exercise test over a period of time of around 30 min with cornerstone measurements every 4 min. | |
Primary | hypoxic ventilatory response at exercise (HVRe) | see description outcome 1 | Continuous measuring during the entirety of the hypoxia exercise test over a period of time of around 30 min with cornerstone measurements every 4 min. | |
Secondary | SHAI prediction score | Calculated by means of obtained results of the Richalet test combined with normalized answers to the altitude mountain consultation questionnaires. In turn, normalized SHAI scores are also compared within and in between both groups in order to evaluate the eventual impact of having suffered COVID19 one one's susceptibility to develop SHAI symptoms. Assessment after each subject has performed the Richalet test - using the by the multiSHAI study validated computation of the SHAI score to define the individual susceptibility to Severe High Altitude Illness (SHAI). | Assessment over a period of time of a common mountain consultation - around half a day. |
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