What action must be taken if a hygienist needs guidance while providing care under offsite supervision?

The correct course of action in a situation where a hygienist requires guidance while providing care under offsite supervision is to reach out to the supervising dentist. This option is appropriate because it ensures that the hygienist receives expert advice and direction from the dentist who is ultimately responsible for the patient's care. The supervising dentist can provide necessary clinical support, help assess the situation, and guide the hygienist in making safe and effective decisions regarding patient treatment.

In a clinical setting, especially when working under offsite supervision, the hygienist must have access to direct guidance from a licensed dentist to ensure compliance with legal and professional standards. This relationship is crucial for maintaining the quality of care and ensuring patient safety.

Other options may not provide the necessary support or guidance. For example, contacting the secretary would likely not yield the clinical advice needed, and consulting with other hygienists may not guarantee that the information is accurate or applicable to the specific situation. Stopping all procedures immediately might not be necessary if the hygienist can seek appropriate guidance and potentially resolve the issue without ceasing care altogether.