Active tuberculosis (TB) is an airborne disease transmitted through the inhalation of droplet nuclei containing Mycobacterium tuberculosis. Effective infection control measures are critical during patient transport to protect healthcare workers, such as emergency medical technicians (EMTs), and to prevent community spread. The Certification Board of Infection Control and Epidemiology (CBIC) emphasizes the use of appropriate personal protective equipment (PPE) and source control as key strategies in the "Prevention and Control of Infectious Diseases" domain, aligning with guidelines from the Centers for Disease Control and Prevention (CDC).
For a patient with suspected active TB, the primary goal is to contain the infectious particles at the source (the patient) while ensuring the EMT is protected from inhalation exposure. Option C, placing an N95 respirator on the patient and a surgical mask on the EMT, is the most appropriate recommendation. The N95 respirator on the patient serves as source control by filtering the exhaled air, reducing the dispersion of infectious droplets. However, fitting an N95 respirator on the patient may be challenging, especially in an emergency setting or if the patient is uncooperative, so a surgical mask is often used as an alternative source control measure. For the EMT, a surgical mask provides a basic barrier but does not offer the same level of respiratory protection as an N95 respirator. The CDC recommends that healthcare workers, including EMTs, use an N95 respirator (or higher-level respiratory protection) when in close contact with a patient with suspected or confirmed active TB, unless an airborne infection isolation room is available, which is not feasible during transport.
Option A is incorrect because placing a surgical mask on both the patient and the EMT does not provide adequate respiratory protection for the EMT. Surgical masks are not designed to filter small airborne particles like those containing TB bacilli and do not meet the N95 standard required for airborne precautions. Option B is impractical and unnecessary, as placing an N95 respirator on both the patient and the EMT is overly restrictive and logistically challenging, especially for the patient during transport. Option D reverses the PPE roles, placing the surgical mask on the patient (insufficient for source control) and the N95 respirator on the EMT (appropriate for protection but misaligned with the need to control the patient's exhalation). The CBIC and CDC guidelines prioritize source control on the patient and respiratory protection for the healthcare worker, making Option C the best fit.
This recommendation is consistent with the CBIC's emphasis on implementing transmission-based precautions (CDC, 2005, Guideline for Preventing the Transmission of Mycobacterium tuberculosis in Healthcare Settings) and the use of PPE tailored to the mode of transmission, as outlined in the CBIC Practice Analysis (2022).
References:
* CBIC Practice Analysis, 2022.
* CDC Guideline for Preventing the Transmission of Mycobacterium tuberculosis in Healthcare Settings,
2005.