Final answer:
When choosing a needle/syringe unit, it is important to consider the patients' risk of infections and needle sticks. Additional safety features may be needed for drug addicts, phlebotomists, and dentists. The choice of needle/syringe unit should be based on the specific needs and risks of the patients.
Step-by-step explanation:
When choosing a needle/syringe unit, it is important to consider the patients' risk of infections and needle sticks.
For drug addicts, it is advisable to use a needle/syringe unit with additional safety features to prevent the transmission of infections. Phlebotomists, who are at a higher risk of needle sticks, should also use needle/syringe units that provide added protection. Dentists, who are also at risk, should take similar precautions.
In conclusion, the choice of needle/syringe unit should be based on the specific needs and risks of the patients.