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Care & Cleaning of Diamond knives

Ophthalmic microsurgical knives with diamond blades are used for cutting and dissection of tissues during ophthalmic, microvascular, neurosurgical and plastic surgery. Usage conditions: hospital departments of surgery and ophthalmology at ambient air temperature from + 10° to + 35°С (+50° to +95° F) and relative air humidity at most 98%.

Blades are made from natural diamonds. Handles are manufactured from titanium alloy. Blade size: The width of the diamond blade cutting edge must be at most 0.2 µm. Blade points must be edged. Blade blunting radius must be at most 0.2 µm. No chips (visible at 100x power magnification) on the blade cutting edge are permitted. The average life span of knives is at least 3 years (or 200 cyclic processes).

Diamond knife consists of a handle and a diamond blade. The handle is fitted with the mechanism providing blade installation and its safe fixation in operative and non-operative position. The construction of a knife can be changed in order to improve its usability.

Each delivery complete set must contain: - diamond knife – 1 unit - a label – 1 unit - care and cleaning instruction – 1 unit

1.General requirements. Taking into consideration the fragility of the diamond blade, each knife is required to be handled, cleaned and storaged delicately. No blows or vibrations are permitted. Any contacts of the blade with other instruments or materials should be avoided.
2.Before using a knife make sure there are no chips on the cutting edge. A microscope with at least 100x power magnification should be used for the inspection.
3.When transporting diamond knives the blades must be fully hidden into the handles (non-operative position). We recommend the knives to be transported in sterilizing cases or special containers to avoid self-movement. Manufacturer provides a shipping clamp to avoid self-movement during transportation. When a knife is not used its blade must be hidden into the handle and protected from mechanical damage.
4.Please rotate the movable part of the handle clockwise and fix the blade to set the knife in operative position. The blade is to be set in the operative position during surgical operation just before the usage.
5.After the usage pull slightly the movable part of the handle downwards and rotate it counter clockwise to return the blade into the non-operative position. To avoid accidental movements of the spring please make sure the handle is fixed tightly. When a handle is fixed a slight click will be heard.
6. To install the knife with a micrometer pull the protective cap down and rotate the bottom part of the handle (with a scale) downwards – the blade will appear. Customize the depth of the blade by screwing the handle – the scale marks will indicate the chosen depth. The scale increment is 0.5 mm. Rotate the handle upwards then put on the protective cap to set the knife in the initial non-operative position. The service life of instruments depends on delicate handling. Do not drop the instruments. The blade must never be in contact with foreign objects. The blade and moving – out spring mechanism need an extremely gentle treatment. Never disassemble the parts of a knife.

Presterilization treatment includes a number of procedures. Please remember to clean the blade and the movable part of the handle, remove blood, tissue debris and viscoelastic directly after the operation (or within 2 hours after it). For Manual Cleaning:
- dip instruments into weak alkaline cleaning solution and keep for 60 minutes at a temperature of +22°С (+72°F );
- the handle of a knife (together with the movable part) can be cleaned with a soft brush;
- flush the instruments with flowing water for 0.5 minutes, then sluice with distilled water for other 0.5 minutes;
- we recommend to use a diamond knife cleaning pack (21-602-1) for gentle cleaning of the blade. The pack contains three solutions that eliminate residual debris off the blade and prepare it for sterilization

Diamond knives can be cleaned in an automatic washer designed for micro-surgical instruments. Please follow the instruction of the manufacturer.
Do not use ultrasonic baths to wash diamond knives – the blade can be damaged.

Sterilization is achieved by means of saturated steam in a steam autoclave. Dry instruments in a drying cabinet by hot air convection at a temperature of +85°С (+185°F ) until complete moisture removal. Sterilization is handled under the pressure up to 0.2 MPa at a temperature of +132°С (+270°F) for 20 minutes. The maximal temperature for sterilization is +141°С (+286°F). Make sure the blade is in the non-operative position before sterilization; self-movement must be avoided. We recommend to sterilize the knives in trays specially designed for diamond knives – silicone holders will fix them safely.

Please always follow the instruction provided by the manufacturer of your sterilizer.

Diamond knives must be kept at a temperature from +10°C  to +35°С (+50°F  to +95°F) and relative air humidity at most 98%. Indoor air must not contain corrosive additive agents. The blade must be fully hidden into the handle (non-operative position); self-movement must be avoided. No blows or vibrations are permitted.

Manufacturer guarantees knives to be in accordance with the documentation when service and storage instructions are followed by the consumer. We provide a 2 year guarantee for the moving-out spring mechanism and titanium parts. Diamond blade can be resharpened or exchanged according to the after-sale service program.

Incoming inspection is obligatory. It includes: - visual examination of the package obtained (no mechanical damages are permitted); - visual inspection of the knife (no mechanical damages such as cracks, chips, oxide scales etc. are permitted; all parts of the knife must be joined smoothly); - a blade must be set into the operating/non-operating position without jamming; it must be fixed easily The knives you purchase are not sterile and should be sterilized before the first surgery. Please examine the blade before each operation and never use a knife in case any defect is noticed – we can always provide you with the resharpening or blade replacement.

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