A nurse is providing teaching to a client who is initiating oral contraceptive use. Which of the following client conditions is a contraindication for oral contraceptive use?

Choice A reason: Performing postural drainage immediately after meals risks aspiration and discomfort due to gastric contents shifting during positioning. It should be done 1-2 hours after meals to ensure safety and efficacy in clearing mucus from the lungs, making this timing inappropriate for cystic fibrosis management.
Choice B reason: Performing postural drainage twice daily is recommended for cystic fibrosis to mobilize thick mucus from the lungs, improving airway clearance and reducing infection risk. This frequency balances effectiveness with patient tolerance, aligning with evidence-based guidelines for managing chronic respiratory conditions, making it the correct action.
Choice C reason: Using a percussion vest is an alternative to manual postural drainage but is not specified as the only method. Manual techniques are effective and standard unless a vest is prescribed. This choice assumes equipment availability, which may not apply, making it less universally appropriate than scheduled manual drainage.
Choice D reason: Positioning the child flat during postural drainage is incorrect, as specific angled positions (e.g., head-down) are needed to target lung segments and promote mucus drainage by gravity. Flat positioning reduces effectiveness and may not clear airways adequately, making this an inappropriate technique for cystic fibrosis.

Choice A reason: Experiencing delusions can contribute to agitation, but it is not the strongest predictor of violence. Delusions may lead to unpredictable behavior, but past actions are more reliable indicators, so this factor is less definitive, making it incorrect.
Choice B reason: A history of being in prison indicates past legal issues but not necessarily violent behavior. Incarceration alone is not a direct predictor of future violence, so this factor is less reliable than actual violent history, making it incorrect.
Choice C reason: A history of violent behavior is the best predictor of future violence, as past actions strongly correlate with recurrence, per evidence-based risk assessments. This reliable indicator guides safety planning, making it the correct factor to emphasize in teaching.
Choice D reason: Substance use disorder increases impulsivity and aggression risk, but it is less predictive than a documented history of violence. Substance use is a contributing factor, not the strongest indicator, so this is incorrect compared to past behavior.