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How does the production of sets of surgical instruments

Как происходит производство наборов хирургического инструмента | How does the production of sets of surgical instruments

How does the production of sets of surgical instruments

Below is a brief list of the steps of sets of surgical instruments creating, and in the early stages - it is solely manual labor. The sample is drawn by hand or in a computer program and is subject to the assessment of doctors, mechanics, vendors - for its relevance and economic benefits. Then the choice of material begins. Selection of the right material for the sets of surgical instruments is critical for subsequent service life. Despite the large number of stainless steel grades only a few suitable for the creation of sets of surgical instruments.

Suitable groups of materials are given in ISO 7153, BS 5194 and AISI F899. AISI 304 is used to create holders, forceps, retractors, cannulas, suction. AISI 410/410 X is used to create sets of surgical instruments. AISI 420 A is used to create cutting tools, bone cutters, chisels, carbide plates and needle holders, scissors. AISI 420 B for high octane cutting tools (scissors, rongeur).

Forging - a process of forming the metal parts under the influence of compressive forces in the hot or cold state. There are two types of forging, involved in the production of sets of surgical instruments - hand forging for small quantity orders, and forging hammer - for large quantities. Next, the surface is subjected to laser processing, which increases the corrosion resistance. Etching - the main method of descaling.

Passivation is performed if the scale, rust, iron particles and metallic chips adversely affect the stability of the surface. Process means immersion of stainless steel instruments in a solution of nitric or citric acid and sodium dichromate. Elektropassivation gives a smooth and mechanically stable surface, often in combination with phosphoric and sulfuric acid.

Ultrasonic cleaning - method of cleaning the surface of sets of surgical instruments, based on the excitation of ultrasonic frequency vibrations in the washing solution.

The next step is testing the functional purpose of the tool.

The whole production process has its own set of parameters, depending on customer requirements. The combination of steel prices and the level of effort invested in the creation of a tool is reflected in its cost. Finding the perfect balance between cost and quality demands experience. According Pareto principle 20% of the time required to make 80% of instrument, but 80% of the time required to complete the remaining 20% of the work.