Autonomic nervous activity monitor, blood processing apparatus, blood collecting apparatus and autonomic nervous activity monitoring method

Abstract

An autonomic nervous activity monitor capable of predicting occurrence of abnormal reaction depending on autonomic nervous activity and used for medical practice and the like is provided. A blood component collecting apparatus 100 carries out frequency analysis to a pattern of heartbeat which is acquired by an ECG 300 from a donor, and calculates a high frequency component value [msec2] defined as an indicator for parasympathetic activity and a ratio value of a low frequency component to the high frequency component defined as an indicator for sympathetic activity to detect a change in these values on a time-series base. When a judgment circuit 204 predicts that abnormal reaction may occur to a donor after blood collection operation is started, a controller 200 controls a pump 9 to decrease a blood drawing or blood returning speed, or, to stop blood drawing or blood returning operation.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]Applicants claim priority under 35 U.S.C. § 120 to U.S. application Ser. No. 11 / 083,213, filed Mar. 18, 2005, which is currently pending.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an autonomic nervous activity monitor, a blood processing apparatus, a blood collecting apparatus and an autonomic nervous activity monitoring method.[0004]2. Description of Related Art[0005]Vasovagal reactions (VVR), delayed dizziness or faintness often occur(s) to a donor or patient during or after blood collection as adverse reaction (abnormal reaction).[0006]The VVR may cause the donor or patient bad feeling, dizziness, faintness or shock disease during blood collection, and the donor or patient occasionally falls into serious conditions. Because such phenomena harm the donor or patient mentally due to implantation of a fear to blood collection, it is likely to have a trouble thereafter in blood collection...

AI Technical Summary

Benefits of technology

[0012]Furthermore, in order to achieve the above object, a third aspect of the present invention is directed to a blood collecting apparatus that carries out blood collection operation to a body, comprising: a biological information acquisition unit which measures heartbeat or pulse of a body to acquire a pattern of the heartbeat or pulse as biological information; a calculation unit which calculates a value [msec2] of a high frequency component (a HF value) defined as an indicator for parasympathetic activity and a value of a ratio of a low frequency component (LF) to the high frequency component (a LF / HF ratio value) defined as an indicator for sympathetic activity on a time-series base by carrying out frequency analysis to the pattern of the heartbeat or pulse acquired by the biological information acquisition unit; a blood collection unit which carries out the blood collection operation to the body; and a controlling unit which controls the blood collection unit and which predicts whether abnormal reaction may occur to the body from a predetermined relationship between the HF value and the LF / HF ratio value, based upon the HF values and the LF / HF ratio values calculated by the calculation unit, wherein the controlling unit, when predicted that abnormal reaction may occur to the body after starting the blood collection operation of the blood processing unit, reduces a rate for collecting blood from the body according to the blood collection unit, or, stops the collection operation of the blood collection unit.

Problems solved by technology

The VVR may cause the donor or patient bad feeling, dizziness, faintness or shock disease during blood collection, and the donor or patient occasionally falls into serious conditions.

Because such phenomena harm the donor or patient mentally due to implantation of a fear to blood collection, it is likely to have a trouble thereafter in blood collection, medical treatment or the like.

But, it is difficult to predict and prevent adverse reaction which occurs to a donor or patient after his / her leaving a blood collection room.

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