Cardiovascular reactions before blood donation in voluntary donors of blood

Wang Bingjie; Yang Jinshui; Li Yingjie; Yu Hongxia; Li Hongjin; Li Jingli

doi:10.3969/j.issn.1674-4055.2018.01.10

Abstract：Objective To discuss the psychological and physical reactions of the body to blood donation stress, and relationship between these reactions and vasovagal reactions (VVR) through observing the changes of blood pressure (BP) and heart rate (HR) in voluntary donors 5 min-10 min (timepoint 1) and 0 min-3 min (timepoint 2) before blood donation. Methods The soldiers on service (n=687) were chosen, and 211 in control group (nonparticipants of blood donation), and 476 in test group. The test group was randomly divided into timepoint 1 group (n=335, BP and HR detected 5 min-10 min before blood donation) and timpoint 2 group (n=141, BP and HR detected 0 min-3 min before blood donation). The occurrence of VVR was observed during blood donation. Results The diastolic blood pressure (DBP) and mean arterial pressure (MAP) increased in timepoint 1 group compared with control group before blood sampling, and systolic blood pressure (SBP), DBP, MAP and HR increased all in timepoint 2 group compared with control group and timepoint 1 group before blood sampling (all P<0.05). In timepoint 1 group before blood sampling, DBP and MAP increased in non-VVP group, and SBP increased in VVR group compared with control group (all P<0.05). The comparison between non-VVP group and VVR group had no significant difference. In timepoint 2 group before blood sampling, SBP, DBP, MAP and HR increased in non-VVP group, and only HR increased in VVR group compared with control group, and DBP and MAP were significantly higher in non-VVR group than those in VVR group (all P<0.05). Conclusion The sympathetic nerve system will be activated before blood donation, and psychological and physical reserve capacity will be lower in voluntary donors with VVR after blood donation. The observation on BP and HR changes within 3 min immediately before puncturing can review psychological and physical reactions and predict VVR in voluntary donors of blood.