Febrile Participant With a Cough in a Small Spirometry Room
Ms. Chen is a 42-year-old elementary school teacher scheduled for baseline spirometry at 10:00 as part of an asthma research study. At check-in she reports a 3-day history of worsening cough, sore throat, and subjective fever; her oral temperature is 38.2°C. She has audible congestion and is coughing frequently. She also reports 20 weeks of pregnancy, well controlled asthma, and that she used her albuterol inhaler 2 hours ago. She smoked half a cigarette in her car 25 minutes before entering the clinic and drank coffee on the way. The clinic has a single spirometer in a small exam room with no negative-pressure ventilation; staff have N95 respirators, gloves, and gowns. The study protocol requires baseline testing before starting a new medication, but the window is 2 weeks. The participant says she 'can't come back for a month' because of work. There is no urgent clinical indication for spirometry today.
1. Should the test proceed today? Consider contraindications, preparation, and infection control.
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Testing should be deferred. An acute febrile respiratory illness with frequent cough is a safety and infection-control issue: forced maneuvers and coughing generate aerosols, and this small room has no negative-pressure ventilation. The staff PPE does not eliminate the risk to the technician or later patients, and the study has no urgent clinical indication. Preparation is also inadequate: she smoked 25 minutes ago and used albuterol 2 hours ago, both of which can alter results. Pregnancy is not a contraindication, but it does not justify testing during a febrile illness. Advise her to stay home until afebrile for at least 24 hours without antipyretics and symptoms are improving. Document the temperature, symptoms, and deferral; notify the study coordinator. If testing were medically urgent, use a separate room, source control, staff N95, and schedule at the end of the day, but that is not the case here.
2. If she returns next week, what preparation instructions and screening steps are needed before the maneuver?
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When she returns, screen again for fever, cough, recent illness, and pregnancy status. She should avoid smoking for at least 1 hour, avoid caffeine for 30 minutes if your protocol requires it, and withhold short-acting bronchodilators for 4-6 hours (verify with the study protocol and her clinician). She should eat only a light meal, avoid vigorous exercise for 30 minutes, and wear loose clothing. Confirm she can sit upright, use a nose clip, and make a good mouth seal. Review inhaler technique and record the last dose. Because she is pregnant, allow rest breaks and stop for dizziness or shortness of breath. Obtain at least three acceptable maneuvers and two reproducible FEV1/FVC values; if she cannot, document the limitation rather than forcing extra trials.