Effect of an acute blood donation on oxygen uptake kinetics in moderate and heavy domains over a period of 96 hours.
Transfusion
; 60(12): 2896-2906, 2020 12.
Article
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| MEDLINE
| ID: mdl-32914882
ABSTRACT
BACKGROUND:
Studies determining the effects of blood donation (BD) on oxygen uptake kinetics are limited. This study aims to ascertain the effects of BD (~470 mL) over a period of 96 hours on oxygen uptake kinetics in moderate and heavy exercise domains. STUDY DESIGN ANDMETHODS:
Twelve participants (nine males and three females; 31.1 ± 11.7 years, mass 79.9 ± 12.8 kg, height 175.5 ± 7.5 cm) completed four consecutive days (24-96 hours) of moderate and heavy VËO2 on-kinetics trials pre BD and post BD. Visit one (0 hour), pre BD established hematological levels, VËO2max and Gas Exchange Threshold (GET). Subsequent visits comprised two 6-minute moderate (∆ 50% rest-GET) and 1 heavy (∆ 20% GET-VËO2max ) trial. Post BD 0 hour the participants donated blood post hematological testing only.RESULTS:
Despite non-significances for VËO2 amplitude, time constant-2 (tau2 ) for VËO2 showed significant decreases at 24 and 48 hours, and tau3 showed significant increases at 72 and 96 hours pre to post BD (P < .05). Hemoglobin (Hb) values reduced (P < .05) pre (14.48 ± 0.16 g·dL-1 ) to post BD (13.47 ± 0.66 g·dL- 1). Hb significantly decreased at 24, 48, 72, and 96 hours compared to 0 hour post BD (P < .05).CONCLUSION:
BD has no effect on VËO2 amplitude, but time-based components show sensitivity to reduced circulating O2 ; with a decreased PO2 a slower O2 exchange across the blood myocyte barrier could result in altering O2 kinetics.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Oxígeno
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Consumo de Oxígeno
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Donantes de Sangre
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Prueba de Esfuerzo
Límite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Transfusion
Año:
2020
Tipo del documento:
Article
País de afiliación:
Reino Unido