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Assessment of bronchial asthma exacerbation: the utility of platelet indices

Abstract

Background

Activated platelets and platelet indices have a vital role in bronchial hyper-responsiveness, bronchoconstriction, bronchial inflammation, airway remodeling, angiogenesis, allergic reactions, and repair and renewal of tissues; platelets contain mediators that lead to inflammatory response.

Aim

The aim was to assess the use of platelet indices [mean platelet volume (MPV), platelet distribution width (PDW), plateletcrit (PCT), and platelet large cell ratio (PLCR)] as cheap and readily available biomarkers for bronchial asthma exacerbation.

Patients and methods

A case–control study involved 45 bronchial asthma female patients during both stable and exacerbation phases, and 45 age-matched healthy female patients as a control group. Measurements of platelet counts, MPV, PDW, PCT, PLCR, C-reactive protein (CRP), spirometric indices, and arterial blood gases were performed for all participants.

Results

The MPV and PDW were significantly lower, whereas the PCT and PLCR were considerably higher in exacerbation phase compared with stable phase and in stable phase in comparison with controls (P<0.001). The MPV and PDW were negatively correlated with white blood cells, PaCO2, symptoms duration, and hs-CRP (high sensitive), with positive correlation with forced expiratory volume in the first second and PaO2 (P<0.001). PCT and PLCR were positively correlated with white blood cells, PaO2, and symptoms duration, and negatively correlated with forced expiratory volume in the first second, symptoms duration, and hs-CRP (P<0.001).

Conclusion

The platelet indices were altered in exacerbation phase compared with stable phase and control group. Therefore, clinicians should not ignore interpreting platelet indices during asthma exacerbation, especially as these tests are simple, readily available, and of lower cost. It appears that measurement of the platelet indices is a valuable indicator of asthma severity/activity and appears as a useful screening test for asthma exacerbation.

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Correspondence to Sawsan B. Elsawy MD.

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Hafez, M.R., Eid, H.A., Elsawy, S.B. et al. Assessment of bronchial asthma exacerbation: the utility of platelet indices. Egypt J Bronchol 13, 623–629 (2019). https://doi.org/10.4103/ejb.ejb_69_19

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