Sphygmomanometer

The sphygmomanometer may externally, on the upper arm or wrist, the arterial pressure of the people to be measured ( see blood pressure measurement). Arterial blood pressure readings are usually given in the unit not SI -compliant millimeters of mercury ( mmHg or Torr). The meters show the upper ( systolic ) and the lower ( diastolic ) on arterial pressure.

Pryctical ( Sphygmomanometer )

Classical arterial pressure measurement is carried out by mechanical devices on the upper arm. Are located on a cuff is connected via tubing, an analog pressure gauge and a rubber ball. The pressure cuff on the upper arm, just above the elbow, applied and inflated to the rubber ball. During the slow draining occur Verwirbelungsgeräusche on ( Korotkoff sounds ), against which it can be determined with the aid of a stethoscope, the systolic and diastolic arterial pressure ( auscultatory measurement).

Measured with the cuff on the upper arm and keys of the pulse " according to Riva- Rocci " blood pressure is abbreviated as " RR " ( Riva Rocci ). During the time the measurement has been improved by the analogue pressure gauge has been supplemented by electronic sensors, which made the stethoscope dispensable and also further data such as pulse rate could collect.

Digital Blood Pressure Monitor

Modern, electronic blood pressure monitors measure the arterial pressure more or less automatically.

Measurement on the wrist

The commercial instruments measure the arterial pressure at the inside of the wrist and are easy to use. Gauge and cuff form a unit. The device is on the inside of the wrist, the radial artery, is applied and secured to the cuff. After starting the measurement, the cuff is inflated by an electric pump so long on an initial test pressure until no blood can flow through the artery more. An electrically controlled valve by the pressure in the cuff is gradually reduced. Sensors measure the actual pressure and the changing blood flow noise. The device registers the point of the systolic and diastolic arterial blood pressure by means of pattern recognition. In addition, other indicators such as heart rate, heart rhythm disorders, and recorded an overall rating status can be determined.

The measured blood pressure depends strongly on the relative height measurement from - especially on the position of the cuff by the arm position. Therefore, the rule is to keep the cuff at heart level as possible. 1 cm column of blood / measured height corresponding to a change in pressure of about 0.75 mmHg. Held at navel height so you would measure approximately 20 mmHg more pressure.

Measurement on the upper arm

Modern upper arm Meters indicate the values ​​on an integrated screen. The collar can be separated from the meter to enable different sleeve sizes. They are less user-friendly than gauges with measurement on the inside of the wrist and more expensive. For them, but speaks the accuracy of the measurement results.

Swell

  • Operating instructions from the manufacturer VISOMAT
  • General Information on www.blutdruckdaten.de
Blood pressure#Measurement Diastole Analogsignal Scipione Riva-Rocci
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