CST Chapter 11 Quiz

Explanation
Tungsten carbide is a very hard and durable material, making it ideal for scissors blades. It holds a sharp edge for a longer period of time compared to stainless steel blades, which tend to dull more quickly. Therefore, the statement is true.

Explanation
Tissue forceps and dressing forceps are both types of surgical instruments used for different purposes. Tissue forceps have teeth on their tips, which provide a firm grip on tissues during surgical procedures. On the other hand, dressing forceps have serrations, which are small grooves on their tips that help in securely holding dressings, gauze, or other materials during wound care. Therefore, the statement that tissue forceps have teeth and dressing forceps have serrations is true.

Explanation
Double action ronguers are not typically tested for sharpness using tissue paper. Instead, they are usually tested by cutting through various materials such as gauze or surgical drapes to assess their cutting ability and sharpness. Tissue paper is not a suitable material for testing the sharpness of ronguers.

Explanation
Laser etching is a permanent instrument marking process because it uses a high-powered laser beam to remove material from the surface of an object, creating a permanent mark. The laser beam vaporizes or melts the material, leaving a precise and permanent mark that is resistant to fading, wear, and corrosion. This makes laser etching an ideal method for marking instruments as the marks will not fade or deteriorate over time, ensuring the identification and traceability of the instrument.

Explanation
The explanation for the correct answer, which is False, is that surgical instruments require a more thorough and effective cleaning than what mild dish soaps can provide. Dish soaps may not be strong enough to remove all the bacteria and contaminants from surgical instruments, which can pose a risk to patients. Therefore, specialized cleaners and sterilization methods are used in the healthcare industry to ensure proper cleanliness and safety.

Explanation
Microgrind or supercut scissors are usually identified with a black handle. This means that most of these types of scissors have a black handle. The color black is commonly associated with microgrind or supercut scissors, which helps in distinguishing them from other types of scissors.

Explanation
Stainless steel jaw needleholders do not last longer than tungsten carbide jaw needleholders. Tungsten carbide is a much harder material than stainless steel, which makes it more resistant to wear and tear. Therefore, tungsten carbide jaw needleholders have a longer lifespan compared to stainless steel jaw needleholders.

Explanation
The statement is true because the place where the two parts of a ring-handled instrument meet and pivot is indeed called the box lock. This term is commonly used in reference to various instruments, such as surgical tools or pliers, where the two parts are connected and can move relative to each other at the pivot point. The box lock provides stability and allows the instrument to function properly.

Explanation
Instruments are not heat treated to give their surface a mirror finish. Heat treatment is a process used to alter the physical and sometimes chemical properties of materials, such as increasing their hardness or strength. A mirror finish on the surface of an instrument is typically achieved through polishing or other surface finishing techniques, not heat treatment. Therefore, the correct answer is False.

Explanation
Tissue forceps have teeth to provide a better grip on delicate tissues during surgical procedures. The teeth on the forceps help to securely hold the tissue without causing excessive damage or slippage. This allows for more precise and controlled manipulation of the tissue, reducing the risk of complications during surgery.

Explanation
During instrument manufacture, the process of passivation involves the formation of a protective chromium oxide layer on the surface of each instrument. This layer acts as a barrier, preventing corrosion and improving the overall durability and longevity of the instrument. Therefore, the statement "during instrument manufacture, the process of passivation helps build a protective chromium oxide layer on each instrument's surface" is true.

Explanation
The given statement is false. The part of a hemostat that locks and holds it in position is actually called the ratchet lock, not the box lock. The box lock refers to the hinge mechanism that connects the two arms of the hemostat.

Explanation
Laser finished instruments are not necessarily coated with a durable protective finish that cannot be chipped or scratched. While laser finishing can provide some level of protection, it does not guarantee that the instruments will be completely resistant to damage. Therefore, the statement is false.

Explanation
When assembling an instrument set, it is important to place heavier instruments at the bottom and lighter ones on top. This is because placing heavier instruments on top of lighter ones can cause the lighter instruments to become unstable and potentially fall or shift during transportation or use. By placing heavier instruments at the bottom, they provide a stable base and hold the lighter instruments in place, reducing the risk of damage or accidents. Therefore, the correct answer is False.

Explanation
After applying instrument identification tape, autoclaving the instruments helps the tape bond securely to the surface. Autoclaving is a process of sterilization that uses high-pressure steam to kill bacteria, viruses, and other microorganisms. The heat and moisture from the autoclave help to activate the adhesive on the tape, ensuring that it adheres firmly to the instrument. This helps to prevent the tape from peeling off during use, ensuring accurate identification of the instrument and maintaining proper hygiene in healthcare settings.

Explanation
Instrument marking tape should be wrapped approximately 1 to 1 1/2 times around the instrument. This ensures that the tape securely holds the instrument in place without being too tight or too loose. Wrapping the tape more than 1 1/2 times may restrict movement or cause discomfort to the instrument, while wrapping it less than 1 time may not provide enough support. Therefore, wrapping the tape 1 to 1 1/2 times strikes a balance between stability and comfort for the instrument.

Explanation
Heat fused nylon is not an acceptable form of instrument marking. Commonly used methods include laser etching, acid-base etching, and electric etching. These methods ensure clear and permanent marking without compromising the integrity or functionality of the instrument, meeting quality standards in medical and surgical environments.

Explanation
A suction stylet is a medical instrument used during surgery to remove or clear any blockages in the suction system. It helps to unclog the suction by removing any debris or fluids that may obstruct the flow. This ensures that the surgical area remains clear and allows for effective suctioning during the procedure.

Explanation
The correct answer is an index card. This is because kerrison laminectomy ronguers are surgical instruments used to remove bone during spinal surgery. They have sharp edges that need to be tested for sharpness. An index card is a suitable material for testing the sharpness of the ronguers because it is thin and can easily be cut by the instrument. Tissue paper may not provide enough resistance to accurately test the sharpness, while a plastic dowel rod or rubber testing material may be too thick or rigid to effectively evaluate the sharpness of the ronguers.

Explanation
Scissors with tungsten carbide cutting edges are usually identified by gold handles. This is because gold handles are commonly used to indicate that the scissors have tungsten carbide cutting edges. The use of gold handles helps users easily identify and differentiate these scissors from others that may have different types of cutting edges.