Which guidelines should health care workers follow during patient treatment?

Using personal protective equipment (PPE) as necessary is a fundamental guideline that health care workers must adhere to during patient treatment. PPE, which includes items like gloves, masks, face shields, and gowns, serves as a critical barrier between the healthcare provider and potential sources of infection. This practice not only helps protect the health care worker from exposure to infectious agents but also ensures patient safety by reducing the risk of cross-contamination. The use of PPE is an essential component of infection control protocols, underlining the healthcare workers' responsibility to minimize health risks during dental procedures and treatments.

In contrast, the other options do not align with best practices in healthcare and patient safety. Performing procedures without patient consent undermines ethical standards and legal requirements in healthcare. Limiting communication with patients can hinder effective treatment and trust, which are vital to patient care. Ignoring biohazard warnings compromises safety protocols and the well-being of both the healthcare provider and patients, ultimately detracting from the goals of infection control and risk management in the dental setting.