1) Naosuke Sasaki and Seiji Mikami: On the objective recording method in the determination of blood pressure.　Workshop, Izumo, November 2, 1983.

2) Seiji Mimami: A study on the vascular information for the development of automatic blood pressure measurement system. Hirosaki Med. J. 37(5), 1985.(in press)

Abstract:

1) Korotkov sounds were always appeared overlapping the pulse waves.

2) The time difference between pulse wave and Korotkov sound (P-K time) was decreased by the deflting cuff pressure.

3) Our index on the blood pressure measurement by Objective Recording Method (Sasaki and Hasunuma: 8th World Congress of Cardiology,　Tokyo, 1978.) were suitable with regard to the spectrum analysis.

4) The patterns of the appearance of Korotkov sounds were not same as to be said.

5) According to the results of spectrum analysis and the comparison of analog data, sampling time of vascular sound seemed to be suitable by 2 msec.

3) ABMS(Khi-V3, Vine Co. Ltd, Tpkyp) provides not only analog data such as recorded ECG paper but also digital data using cassette tape recorder. Digital data consists of three block. The first block is header block, and the second block is pressure axis block, and the third block is wave data block. Wave digital data was sampled by 2 msec. These data can be transmitted to fast CMT interface. We can verify the recognition points or values of ABMS by display wave data (Fig.1) and pressure data to CRT display or　drawing to X-Y plotter and check up to details where ECG recorder is not able to draw. The major problem inherent in this system at present is that the soft ware for recognition point of systolic and diastolic blood pressure in the wave digital data is not fully examined, although this machine has an apparent advantage of a high degree of reproducibility and also provides a facility for storage of the data on magnetic tape. Fig.2 shows the points recognized by Fukuoka and Fig. 3 shows the points recognized by Mikami.