CIS - Certified Instrument Specialist Instrument Manufacturing and Repair Questions and Answers

Question 1

An instrument specialist inspecting a box lock on a hemostat notices fine, spiderweb-like cracks emanating from the joint. This type of damage is most characteristic of which phenomenon?

Accepted Answer

Stress corrosion cracking

Answer

Electrolysis

Answer

Improper sharpening

Answer

A manufacturing forging flaw

Question 2

In the manufacturing of surgical instruments, what is the primary advantage of a satin (matte) finish compared to a highly polished mirror finish?

Accepted Answer

It reduces glare from overhead operating room lights.

Answer

It provides a better grip for the surgeon.

Answer

It is significantly more resistant to corrosion and staining.

Answer

It allows for easier cleaning in an ultrasonic cleaner.

Question 3

What property of 400-series martensitic stainless steel makes it the preferred material for the manufacturing of scissors, osteotomes, and chisels?

Accepted Answer

Its ability to be heat-hardened

Answer

Its superior resistance to corrosion

Answer

Its high flexibility and ductility

Answer

Its non-magnetic properties

Question 4

A new batch of stainless steel retractors shows signs of rust after only a few processing cycles. The hospital's water quality and sterilization processes are verified to be within specifications. Which manufacturing step was most likely inadequately performed?

Accepted Answer

Passivation

Answer

Forging

Answer

Tempering

Answer

Polishing

Question 5

A repair technician has just finished sharpening a 1/2 inch osteotome. To verify the repair is successful and the edge is free of burrs or chips, what is the recommended functional test?

Accepted Answer

Shaving a small piece of a plastic dowel rod.

Answer

Cutting through several layers of gauze.

Answer

Gripping a fine suture without slippage.

Answer

Using it to cleanly cut an index card.

Question 6

When the tungsten carbide inserts on a needle holder become worn, which of the following is the appropriate repair action?

Accepted Answer

The inserts should be completely replaced.

Answer

The needle holder should be discarded as it is unrepairable.

Answer

The surface should be re-etched with a diamond file.

Answer

The existing inserts should be coated with a new layer of tungsten carbide.

An instrument specialist inspecting a box lock on a hemostat notices fine, spiderweb-like cracks emanating from the joint.This type of damage is most characteristic of which phenomenon?

An instrument specialist inspecting a box lock on a hemostat notices fine, spiderweb-like cracks emanating from the joint.
This type of damage is most characteristic of which phenomenon?