Protecting patient privacy during EMS transport means making sure personal health information stays confidential and is accessible only to those who need to know. The best approach is to minimize exposure of identifying information and electronic or paper records: close curtains or screens to shield the patient, lock devices, secure charts, and dispose of sensitive information according to policy. This reduces the risk that bystanders or unauthorized people see names, diagnoses, or other identifiers, and it keeps equipment and records from being left unsecured. Disclosing information to a trusted friend or sharing data with family, or leaving charts in public view or ignoring device security, would compromise privacy and breach policies. Information should only be shared with authorized personnel who have a legitimate need to know, and all privacy policies and procedures should be followed during transport. Keep PHI protected with password protection, out-of-sight screens, secure storage, and proper disposal of documents, and limit sharing to what is strictly necessary.

When stabilizing a vehicle on uneven ground, the primary goal is to stop any unintended movement. Wheel chocks provide a solid barrier between the wheel and the ground, using the weight of the chock and the friction between tire and surface to prevent rolling. This is crucial because uneven terrain can cause a slight shift in weight or tool movement to translate into wheel motion as you work, which could compromise the scene safety and patient care. Chocks are used to lock the vehicle in place so stabilization devices and personnel can operate without the vehicle creeping or rolling. They don’t directly stabilize the patient, nor do they enhance lighting or protect tires from wear; their job is specifically to prevent motion of the vehicle.

The main idea here is recognizing the tool used for measuring electrical values in automotive work: a Digital Multimeter. A DMM is designed to measure voltage, current, and resistance, and it can also test continuity and diodes, all with a numeric readout. In a car, you’d use it to check battery voltage to gauge charge, verify the charging system output, measure voltage drops in circuits, and test components for proper resistance or open/short conditions. This versatility—the ability to quantify several electrical parameters with one device—is why a Digital Multimeter is the go-to instrument for automotive electrical testing. The other options have narrower roles. An oscilloscope shows waveform shapes rather than straightforward numerical values, an ammeter primarily measures current, and a test light only indicates whether voltage is present.

Voltage spikes in vehicle electrical systems can damage sensitive electronics, so a device that clamps those transients is used. A Transient Voltage Suppressor diode is designed for this purpose. It sits across the power and ground rails and stays inactive during normal operation, but when a surge occurs, it conducts heavily and shunts the excess energy away, keeping the voltage at a safe level for the rest of the circuit. This fast response and high surge-handling capability protects components like the ECU and various sensors from events such as load dumps or inductive kickback. The other options are sensors that measure physical conditions (pressure, wheel speed, crankshaft position) and do not provide protection against voltage transients.