Does COVID-19 really impact on the oxy-hemoglobin dissociation curve?
Flávia Nóbrega1, Vitor Augusto Queiroz Mauad1, Davimar Miranda Maciel Borducchi1
1Faculdade de Medicina do ABC Santo Andre Brazil.
Ejhaem
|July 18, 2022
Summary
COVID-19
Area of Science:
- Pulmonary Medicine
- Biochemistry
- Infectious Diseases
Background:
- The COVID-19 pandemic has prompted reevaluation of physiological concepts.
- A Chinese study proposed SARS-CoV-2 nonstructural proteins may cause hypoxemia by dissociating iron from hemoglobin.
- This hypothesis requires clinical investigation.
Purpose of the Study:
- To evaluate the oxy-hemoglobin dissociation curve in COVID-19 patients.
- To assess the clinical significance of the proposed SARS-CoV-2 mechanism on hemoglobin function.
Main Methods:
- Retrospective cohort study design.
- Utilized digital patient records for oximetry and hemoglobin data.
- Spearman correlation and multiple linear regression analyses were performed.
Main Results:
- A strong correlation (0.843, P < .001) was found between measured and estimated values.
- Regression analysis indicated pH and PO2 significantly influenced SO2 (P < .001).
- Hemoglobin (Hb) levels did not show a significant impact (P = .706).
Conclusions:
- The proposed mechanism of SARS-CoV-2 impacting hemoglobin function appears not to be universal.
- This mechanism likely does not have a significant clinical impact, especially in severe COVID-19 cases.
- Further research is needed to fully understand COVID-19's complex pathophysiology.
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