User Manual for Riester Aneroid Sphygmomanometers

Quick guide from the manual

This manual provides instructions for the Riester aneroid sphygmomanometer series. These devices are intended for professional use by physicians and trained personnel to determine systolic and diastolic blood pressure on healthy skin of the upper arm or thigh. Ensure you identify your specific model (e.g., exacta, e-mega, R1 shock-proof, big ben) to follow the correct installation and cuff usage procedures.

Intended Use

Riester aneroid sphygmomanometers are diagnostic aids used for indirect blood pressure measurement according to the Korotkoff method. They are designed for use on adults, children, infants, and neonates.

Models Overview

The series includes various configurations:

• 1-tube models: e-mega, R1 shock-proof, minimus II, precisa N, babyphon, ri-san. The inflation system is directly connected to the manometer.
• 2-tube models: exacta, sphygmotensiophone, big ben (Round/Square). The manometer is not directly connected to the inflation system.
• Double-tube models: e-mega, minimus III, precisa N.
• Self-measurement models: sanaphon, ri-san. These feature an integrated chestpiece in the cuff.

Installation

Installation instructions vary by model type:

• Wall Model (ri-former big ben): Remove the wing nut under the cuff basket, detach the wall bracket, mark and drill holes, insert anchors, and fasten the bracket. Reattach the unit and tighten the wing nut.
• Mobile Stand (big ben): Assemble the mobile stand according to the provided instructions, then screw the device onto the stand clockwise. Adjust height using the retaining screw.
• Anesthesia Model (big ben): Attach the wall bracket to the back of the universal clamp (No. 10384) using the provided screws, then mount the unit.

Cuff Selection

Choosing the correct cuff size is critical for accurate readings. The white 'Index Line' on the cuff must fall within the 'Range' marked by arrows when the cuff is applied. If the index line is outside this range, the cuff is either too small or too large.

Blood Pressure Measurement

1. Patient Position: The patient should sit comfortably, legs uncrossed, back and arm supported. The cuff center should be at the level of the right cardiac atrium.
2. Preparation: Allow approximately 5 minutes of rest before the first measurement.
3. Application: Place the cuff so the lower edge is approx. 2-3 cm above the crook of the arm (or 5 cm above the knee). Ensure the marking sign is over the artery.
4. Inflation: Close the valve by turning the deflation screw clockwise. Inflate the cuff to approx. 20 mmHg above the expected systolic value. Do not exceed 300 mmHg.
5. Deflation: Open the deflation screw counterclockwise. The ideal deflation rate is 2-3 mmHg/s.
6. Reading: Systole is the first rhythmic beat heard. Diastole is when the beats fall silent.

Cleaning and Maintenance

Cleaning and disinfection protect the patient and the device. Do not immerse the manometer in liquid.

• Manometer and Bulb: Wipe with a damp cloth until optically clean.
• Cuffs: Remove the bladder before cleaning. Nylon/Cotton covers can be washed with soap and cold water or disinfected. Disinfectable one-piece cuffs can be machine washed up to 60°C. Ensure cuffs are completely dry before reuse.
• Precision Check: Remove the tube from the manometer and hold it vertically. If the needle rests at zero, the device is calibrated. If not, it requires recalibration by an authorized Riester dealer.

Technical Data

• Measurement Range: 0 to 300 mmHg.
• Scale Graduation: 2 mmHg increments.
• Operating Conditions: 10°C to 40°C at 85% relative humidity (non-condensing).
• Storage Conditions: -20°C to 70°C at 85% relative humidity (non-condensing).