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BeneVision N22/N19 Patient Monitor Operator’s Manual 15 - 3

• Continuous cuff pressure due to connection tubing kinking may cause blood flow interference, and

resulting in harmful injury to the patient.

• NIBP reading can be affected by the measurement site, the position of the patient, exercise, or the

patient's physiologic condition. If you doubt the NIBP measurements, determine the patient’s vital

signs by alternative means, and then verify that the monitor is working correctly.

• Devices that exert pressure on tissue have been associated with purpura, ischemia, and neuropathy.

Inspect the application site regularly to ensure skin quality and inspect the extremity of the cuffed

limb for normal color, warmth and sensitivity. If the skin quality changes, or if the extremity

circulation is being affected, move the cuff to another site or stop the blood pressure measurements

immediately. Check more frequently when making automatic or STAT measurements. Auto NIBP

measurements with one and two minute intervals are not recommended for extended periods of

time.

• NIBP diagnostic significance must be decided by the physician.

CAUTION

• Only use parts and accessories specified in this manual. Follow the instructions for use and adhere to

all warnings and cautions.

• Accuracy of NIBP measurement depends on using a cuff of proper size. It is essential to measure limb

circumference and choose a cuff with proper size.

15.3 NIBP Measurement Limitations

Measurements are impossible with heart rate extremes of less than 30 bpm or greater than 300 bpm, or if the

patient is on a heart-lung machine. The measurement may be inaccurate or impossible in the following

situations:

■ Regular arterial pressure pulses are hard to detect

■ With excessive and continuous patient movement such as shivering or convulsions

■ With cardiac arrhythmias

■ With rapid blood pressure changes

■ With severe shock or hypothermia that reduces blood flow to the peripheries

■ On an edematous extremity.

NOTE

• The effectiveness of this sphygmomanometer has not been established in pregnant, including pre-

eclamptic patients.

15.4 Measurement Modes

There are three NIBP measurement modes:

■ Manual: measurement on demand.

■ Auto: repeated measurements at set interval.

■ STAT: continually rapid series of measurements over a five minute period.

Mindray BeneVision N22 User Manual

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