Oregon Scientific BPW120 user manual HOW the Blood Pressure Monitor Works

What is the standard blood pressure classification?

Figure 3 illustrates the blood pressure classification made by World Health Organization (WHO) and International Society of Hypertension (ISH) in 1999.

(mmHg)	110			Grade 3 hypertension(severe)
				Grade 2 hypertension(moderate)
	100
Pressure
				Grade 1 hypertension(mild)
	90	High		-normal Blood Pressure
	95			Subgroup:borderline
Blood	85
	80	Normal Blood Pressure
			Optimal Blood
Diastolic
				Pressure
		120			130	140	150	160	180
				Systolic Blood Pressure(mmHg)

Figure 3

Reference material: 1999 World Health Organization-International Society of Hypertension Guidelines for the management of hypertension, Journal of Hypertension, 1999, 17(2): 151-183.

NOTE

•Blood pressure is considered high when either the diastolic or systolic blood pressure value exceeds the normal range. When a patient’s systolic and diastolic blood pressures fall into different categories, the higher category should apply.

•Only a physician can tell you your normal blood pressure range and the point at which you are at risk. Consult your physician to obtain these values. If the measurements taken with these

products fall outside the range, consult your physician.

Why does my blood pressure fluctuate throughout the	EN
day?

Individual blood pressure varies greatly both on a daily and a seasonal or temperature basis. These variations may be more pronounced in hypertensive patients. Normally the blood pressure rises while at work and is at its lowest during sleep. Figure 4 below illustrates the variations over a single day with measurement taken every five minutes. The thick line represents sleep time. The rises in blood pressure at 4 PM (A in the graph) and 12AM (B in the graph) correspond to an attack of pain and sexual intercourse (Beven, Honour & Stott, Clin. Sci. 36:329, 1969).

	160				A								B
PRESSUREBLOOD (mmHg)	140
	40
	120
	100
	80
	60
	20																					Sleep
	12	13	14	15	16	17	18	19	20	21	22	23	24	1	2	3	4	5	6	7	8	9	10	11
			PM									Time							AM

Figure 4

HOW THE BLOOD PRESSURE MONITOR

WORKS

This product uses the Oscillometric Measuring method to detect your blood pressure. Before every measurement, the main unit establishes a “zero pressure” equivalent to the air pressure. Then it starts inflating the wrist cuff to 180mmHg or higher until it senses that it has blocked your blood in the artery. After that,

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