TCFA Feedyard Technician Certification Practice Test

Which of the following factors influences the frequency of needle changes?

1. Type of vaccine administered

2. Size of the animal being vaccinated

3. Amount of medication in the syringe

4. Number of injections given with the same needle

The correct answer is: Number of injections given with the same needle

The frequency of needle changes is primarily influenced by the number of injections given with the same needle. Each time a needle is used for an injection, it experiences wear and tear, and its sharpness decreases. Continuing to use the same needle for multiple injections can lead to tissue damage, increased discomfort for the animal, and greater risk of infection due to potential contamination. Therefore, changing needles frequently ensures that they remain effective and safe for both the technician and the animal. While the other options may relate to specific practices within vaccination or medication administration, they do not directly dictate how often a needle should be changed. For example, the type of vaccine administered or the size of the animal could influence the choice of needle initially but do not affect the necessity to change a needle after a certain number of uses. Similarly, the amount of medication in the syringe pertains more to administration duration rather than the physical condition or usability of the needle itself.