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Medical ultrasonic cleaner - safe and gentle instrument cleaning

BANDELIN ultrasonic cleaner have been developed for the validatable pre-cleaning of medical instruments. They thoroughly remove blood, tissue and biofilms without affecting the material or structure - and thus create the conditions for effective disinfection and sterilisation.
The process relies on precisely controlled Ultrasonic cavitation, to reliably clean even complex instruments such as hollow instruments. This creates a reproducible, validatable cleaning process that forms the basis for every successful disinfection and sterilisation.
With a high level of vertical integration at the Berlin site BANDELIN We control every step of development and production ourselves - from the design of the transducers to the final testing of the devices. This control creates the basis for demonstrably stable processes and consistent quality.

Why ultrasonic cleaning is indispensable in medicine

The cleaning of medical instruments determines the effectiveness of the entire reprocessing chain. Residues from blood, secretions or tissue contain proteins and fats that can impair thermal disinfection and sterilisation. Ultrasound cleaning removes these organic contaminants completely - even in narrow lumens, hinges or micro-channels where brushes or syringes reach their limits.

Compared to manual cleaning, ultrasound works reproducibly and independently of the staff's experience. The process utilises microscopic cavitation bubbles that generate high-energy micro-currents when they implode. In this way, even firmly adhering residues are removed without damaging the surface of the instrument.

Complete instrument trays can be pre-cleaned in just a few minutes, which shortens throughput times and increases work safety. The risk of puncture injuries or cross-contamination is significantly reduced because no direct contact with contaminated material is required. Validatable pre-cleaning in the Ultrasonic bath with co-ordinated Cleaning preparation is therefore now a mandatory component of reprocessing in hospitals, AEMP and surgical practices.

How the cavitation principle works with medical instruments

In the Ultrasonic field alternating phases of negative and positive pressure occur due to rapid pressure changes. Tiny bubbles form in the liquid. Cavitation bubbles, which implode in a fraction of a second. This effect creates fine microcurrents that remove dirt particles and deposits from surfaces - even in drills, files, brackets or instruments with threads and joints.

The effect is uniform, gentle on the material and also reaches areas that remain inaccessible during mechanical cleaning. The frequency of 40 kHz ensures an optimum balance between cleaning intensity and surface protection.
For particularly sensitive instruments, the power can be reduced to ensure gentle treatment.

In combination with the matching Cleaning chemistry the effect is significantly enhanced. Surfactants, enzymes or complexing agents dissolve organic and inorganic residues, while cavitation removes them completely. The temperature of the bath is regulated between 40 and 60 °C, depending on the preparation, in order to optimise the chemical-physical effect.

Factors influencing the cleaning effect:

Frequency (e.g. 35-45 kHz) determines intensity and bubble size

Temperature of the cleaning fluid

Sound field distribution ensures an even effect throughout the pool

Composition of the chemistry influences wettability and emulsification

Duration and basket movement control the complete detachment of the residues

What requirements apply to medical ultrasonic cleaners

Medical Ultrasonic cleaner must fulfil the highest standards of safety, traceability and hygiene. All BANDELIN systems are as Class I medical devices according to EU MDR classified and bear the CE and MD labelling. Production takes place entirely in Berlin under a fully certified quality management system in accordance with ISO 9001 and ISO 13485 - proof of controlled processes, documented traceability and consistent product quality.

Models with digital control such as the SONOREX smart series enable the Process documentation central parameters such as temperature, duration, frequency and programme selection. This data can be exported in an audit-proof manner and forms the basis for Validation, audit and hygiene control. Facilities thus benefit from legally compliant verification management, automated documentation and a standardised workflow that meets the requirements of modern AEMP and CSSD structures consistently fulfilled.

Special technical features - quality instead of compromise

BANDELIN ultrasonic cleaner are developed for continuous operation in medical reprocessing. Each device is manufactured in Berlin, where Ultrasonic field, tank geometry and Transducer power are precisely harmonised with each other. This creates a uniform sound profile throughout the tank - the basis for reproducible cleaning results, even with complex instruments and high batch volumes.

The welded Stainless steel trays are resistant to chemicals, seal-free in the seam area and designed for years of use without loss of performance. Special ceramic sounders work with a stable amplitude, which means that cavitation and cleaning intensity remain constant. The electronics and controls are designed for thermal loads and long running times.

Advantages for the clinic, practice and reprocessing unit

In large sterile supplies, ultrasound accelerates the processing of entire trays and stabilises process sequences.

In surgeries, the procedure facilitates cleaning immediately after the procedure and reduces contact time with contaminated instruments.

The most important effects:

Save time: Parallel cleaning of several instruments

Process reliability: Consistent quality with every batch

Protection of personnel: Lower risk of stab wounds

Protection of the instruments: No mechanical wear, longer service life

Planning capability: Faster turnarounds, less downtime

Practical applications and instrument reprocessing procedure

Ultrasonic cleaning is established in almost all areas of medicine:
In surgical departments, in AEMP/ZSVA, in dental and ENT practices as well as in laboratories.

Suitable are: Surgical instruments made of stainless steel, MIS and robotic instruments, dental instruments, implant instruments and glassware.
Not suitable: Optics, flexible endoscopes and electrical instruments.

The recommended procedure according to KRINKO/RKI:

Pre-cleaning in an ultrasonic bath with suitable cleaning agent
Thermal disinfection at around 95 °C in the washer-disinfector
Packaging in containers or sterile bags
Steam sterilisation at 134 °C

Pure water is not enough to remove organic residues. BANDELIN offers enzymatic and surfactant-based products that work optimally with ultrasonic energy.

Use cases and practical experience

BANDELIN devices are in use in around 90 % hospitals in Germany.
The ultrasonic cleaning process is considered the standard - reliable, low-maintenance and proven over decades.
The benefits are particularly evident in the TRISON system for robotic instruments:
While manual cleaning takes around 15 minutes per instrument, TRISON processes four instruments in the same amount of time - automatically, documented and with minimal manpower.

AEMP managers report stable processes and long-lasting technology: devices that have been in use for 25 years continue to deliver consistent results.

The future of instrument reprocessing

Minimally invasive and robotic processes place new demands on cleaning: long, thin lumens, sensitive materials and tight tolerances.
Bandelin is responding to this with developments that combine ultrasound, rinsing and movement and monitor process parameters digitally.
Automation and documentation are becoming increasingly important - for traceability, occupational safety and cost-effectiveness.

As a German manufacturer with its own development and production facilities, BANDELIN remains a technological leader. The goal: validatable cleaning systems that combine precision, efficiency and sustainability.

Conclusion

Ultrasonic cleaning is the basis of modern instrument reprocessing.
Bandelin combines physical precision with medical experience and manufactures devices that improve safety and efficiency in equal measure.
From stand-alone devices in the practice to automated systems for robotic instruments - BANDELIN stands for reliable technology, reproducible processes and long-lasting quality.