Département R3S, hôpital de la pitié-salpêtrière
Paris, 75013, France
NCT Number: NCT04363749
The purpose of the present study is to determine whether there is a decrease in the emotional response to experimental induction of dyspnea by hypoxic stimulation in subjects with a "neurological" form of COVID-19, compared to healthy controls.
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Notify Me18 year and older
All sexes
Interventional
Not applicable
Paris, 75013, France
SARS CoV-2 infection causes lung damage that can be severe enough to require artificial ventilation. Clinicians taking care of these patients are surprised by the scant respiratory sensations and emotional responses described by patients. This attenuation of respiratory interoception deprives clinicians of the usual warning signs during respiratory decompensation of dyspnea and its aggravation. It may be the result of central nerve damage. This hypothesis is bolstered by the observation that within the multiple clinical forms of COVID-19 infection there are some "neurological" forms (headache, anosmia, agueusia, dizziness, without respiratory signs and with little or no fever), that are most likely the consequence of olfactory penetration of the virus into the central nervous system (mechanism described for SARS CoV-1).
Healthy volunteers accepted: Yes
Only the study team can determine whether someone qualifies for participation.
Inclusion criteria
Exclusion criteria
the fraction of inspired oxygen is reduced from ~21% (room air) to 14.3 and 12.7% allowing the SpO2 to decrease to ~75%, rebreathing test allowing the PCO2 to rise to 65 mmHg, inspiratory mechanical constraint with 50 to 75% of maximum inspiratory pressure
Time frame: 10 minutes
Slope of the relation between the intensity of a hypoxic stimulus to the intensity of the emotional response (visual analog scale, VAS : 0 is no pain and 10 is the worst pain)
Time frame: 5 minutes
ratings of dyspnea immediately after a hypoxic stimulus: Multidisciplinary Dyspnea Profile, MDP : 0 is no change and 10 is unbearable
Time frame: 10 minutes
ratings of dyspnea intensity and unpleasantness during a hypercapnic stimulus (visual analog scale, VAS : 0 is no pain and 10 is the worst pain)
Time frame: 5 minutes
ratings of dyspnea immediately after a hypercapnic stimulus: Multidisciplinary Dyspnea Profile, MDP : 0 is no change and 10 is unbearable
Time frame: 10 min
ratings of dyspnea intensity and unpleasantness during an inspiratory mechanical constraint (visual analog scale, VAS: 0 is no pain and 10 is the worst pain)
Time frame: 5 minutes
ratings of dyspnea immediately after an inspiratory mechanical constraint induced dyspnea(Multidisciplinary Dyspnea Profile, MDP: 0 is no change and 10 is unbearable)
Time frame: 1,5 hours
Multimodal MRI (including anatomical MRI, resting-state functional MRI)
Assistance Publique - Hôpitaux de Paris
Other
Do Respiratory Control Center Anomalies Explain the Lack of Respiratory Sensations Perceptions Observed in Patients Affected by COVID-19 ?
Acronym: CRC-COVID
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