The Spore-Test Gap and the Friday Needlestick
At a two-chair practice in Sparks, the autoclave log's last biological spore test is dated five months ago; the assistant says "we run the strips but nobody writes them down." The office reuses single-dose articaine vials between patients, wiping the stopper with alcohol, because "a box costs too much." On a busy Friday, a 30-gauge needle is recapped two-handed and the assistant sustains a needlestick to the left index finger while disassembling the syringe. The source patient's HBV, HCV, and HIV status is unknown, and the assistant has never been offered hepatitis B vaccination in her 14 months of employment. There is no written exposure control plan on site; the last one "was in a binder at the old office." The dentist has not had a spore-test failure in years and does not want to notify anyone. The assistant asks whether she should "just get tested in a couple of months."
1. Set out the immediate post-exposure management, including the time-sensitive decisions, and state who is responsible for what.
Read the worked answer
Wound care first. Wash the puncture with soap and running water; do not squeeze, milk, or apply caustic agents.
Time-critical decisions. HIV post-exposure prophylaxis is the one item that cannot wait weeks - it should be started as soon as possible after exposure and is generally not offered beyond 72 hours, so the worker needs same-day evaluation (occupational health, emergency department, or the practice's designated provider) for risk assessment and a 28-day regimen decision. If she is unvaccinated for hepatitis B, hepatitis B immune globulin plus the vaccine series is indicated, ideally within 24 hours of exposure. Hepatitis C has no prophylaxis; the plan is baseline testing and timed follow-up RNA testing.
Source and baseline. The source patient should be counseled and tested under Nevada's exposure procedures, with the required consent or authorization process followed; the exposed worker gets baseline HIV, HCV, and HBV serology.
The "wait a couple of months" answer is wrong - it forfeits HIV PEP entirely and delays HBV prophylaxis past its window.
Responsibility. The employer owns the exposure control plan, pays for evaluation and follow-up, keeps the worker's medical information confidential, records the event on the sharps injury log and the OSHA log where the treatment/PEP criteria are met, and evaluates safer devices. The dentist's reluctance to "notify anyone" does not extend to the worker's own medical care or to the legally required logs.
2. Identify the infection-control failures in the practice and describe the corrective and disclosure steps that should follow.
Read the worked answer
Failures, in rough order of seriousness:
- Reuse of single-dose vials between patients. A single-dose vial has no antimicrobial preservative; wiping the stopper does not sterilize it. This is a patient-to-patient transmission risk and is indefensible as a cost measure - the fix is to buy smaller vials and budget properly.
- Spore testing not documented. Biological monitoring should be performed at least weekly, with results logged; "we run them but don't write them down" means there is no assurance the sterilizer works and no way to trace a failure to instruments used on specific patients.
- No current written exposure control plan. It must exist on site, be reviewed and updated at least annually, and reflect actual practice.
- Hepatitis B vaccination never offered. The offer must be made within 10 working days of initial assignment, at no cost, with a declination form if refused.
- Two-handed recapping. Use a one-handed scoop technique or a recapping device, and evaluate sharps with safety features.
Corrective and disclosure steps. Correct each item and document the correction with dates. Determine whether any spore test actually failed and whether instruments from an unmonitored period were used; if a failure is identified, patient notification and retesting may be required. For the vial reuse, the practice should consult public health authorities and the Board's infection-control requirements about patient notification, since patients may need bloodborne-pathogen testing. Concealment is the aggravator: the Board treats falsified or absent sterilization records and reuse of single-dose vials as unprofessional conduct, and the disciplined dentist is usually the one who knew and did nothing.