12.4 Bloodborne Pathogen Exposure: Informing Patients and Disclosing the Dentist's Status

The core rule (K2151)

ADA Section 2.E (Postexposure, Bloodborne Pathogens) reads:

All dentists, regardless of their bloodborne pathogen status, have an ethical obligation to immediately inform any patient who may have been exposed to blood or other potentially infectious material in the dental office of the need for postexposure evaluation and follow-up and to immediately refer the patient to a qualified health care practitioner who can provide postexposure services.

Key features:

• "Regardless of their bloodborne pathogen status." The duty applies to every dentist, not just those known to be infected.
• "Immediately." Post-exposure prophylaxis for HIV works best when started as soon as possible, ideally within hours, so delay can cause real harm.
• "Inform" and "refer." The dentist doesn't have to evaluate the exposure personally, but must make sure the patient reaches someone who can, such as the patient's physician, an urgent care center, or an emergency department.

What counts as a possible patient exposure

• The dentist or an assistant is cut or punctured during treatment and their blood enters the patient's wound or mucosa, for example a glove tear with bleeding during surgery.
• An instrument-processing failure: an unsterilized instrument or a reused single-use item is used on the patient, or a sterilizer fails its spore test and packs from the failed cycles were used (16 CCR § 1005(b)(17)).
• Contaminated equipment, such as a failed barrier with visible blood from a prior patient.

In each case, veracity and nonmaleficence (ADA Sections 5 and 2) also require telling the patient what happened.

When the dentist must share their own status (K2152)

Section 2.E continues:

The dentist's ethical obligation in the event of an exposure incident extends to providing information concerning the dentist's own bloodborne pathogen status to the evaluating health care practitioner, if the dentist is the source individual, and to submitting to testing that will assist in the evaluation of the patient.

The disclosure goes to the evaluating health care practitioner, whose job is to assess the patient's risk. The ADA Code does not require a dentist to announce their status to every patient. California's HIV confidentiality law (Health and Safety Code § 120980) protects test results. A dentist sharing their own status with the evaluating clinician is making a voluntary, authorized disclosure of their own information.

Related duties

Treating patients who have bloodborne infections

ADA Advisory Opinion 4.A.1: decisions about treating patients infected with HIV, HBV, HCV, or another bloodborne pathogen must be made on the same basis as for other patients. Refusal is disability discrimination (Section 7.3; Bragdon v. Abbott). Standard precautions (16 CCR § 1005(b)(1)) are designed so that the dentist need not know a patient's status to be safe.

Advertising test results

ADA Advisory Opinion 5.F.5: advertising a dentist's negative HIV test without context is misleading. A dentist may say, for example, "This negative HIV test cannot guarantee that I am currently free of HIV."

When staff are exposed

For employee exposures from a patient (the reverse direction):

• Cal/OSHA's Bloodborne Pathogens Standard (8 CCR § 5193) requires the employer to provide a confidential post-exposure evaluation and follow-up.
• Health and Safety Code § 120262 allows testing of a source patient's already-drawn blood after a physician certifies a significant exposure. The written request must be made within 72 hours, and the statute's consent and counseling steps must be followed.

Preventing exposures in the first place

Most patient exposures are preventable with the controls already required by 16 CCR § 1005 and Cal/OSHA:

• Sharps technique: one-handed scoop recapping or a recapping device, containers at the point of use, and heavy utility gloves when cleaning instruments.
• Engineering controls: safer needle devices where available, evaluated and recorded under the Exposure Control Plan.
• Double-gloving and glove changes during long surgical procedures, which some clinicians use to reduce tears.
• Reprocessing checks: weekly spore tests, pack labels showing the sterilizer and date, and a written plan for recalling packs after a failed test.
• Incident review: a written review of each exposure to prevent a repeat.

Worked scenario

During a surgical extraction, the dentist's glove tears on a bone edge, and her bleeding finger contacts the patient's open socket. The dentist knows she is HBV-negative and HIV-negative but has not been tested for HCV recently.

1. Stop, wash, and assess. Tell the patient what happened and that they should have a post-exposure evaluation.
2. Refer the patient immediately to a qualified practitioner, and call ahead if possible.
3. Provide the dentist's known status to the evaluating practitioner, and get tested as needed to help evaluate the patient.
4. Document the incident, the disclosure, and the referral. Review glove and technique practices.