What are the two machine alarms that are critical to safety?

The most critical machine alarms for safety in the context of a dialysis setting are those related to pressure holding and alarm safety. Pressure holding alarms are essential because they indicate any issues related to the pressure within the dialysis circuit, which, if not addressed, could lead to serious complications such as blood or fluid leaks. These alarms help ensure that the system operates within safe parameters, preventing potential harm to the patient.

Alarm safety encompasses the importance of recognizing and responding to any audible or visual alarms that signal malfunctions or unsafe conditions. A functioning alarm system is vital for immediate intervention, ensuring that any problems can be addressed quickly to protect the patient's well-being during treatment.

Other options mentioned do not focus on the immediate safety implications inherent to the operation of dialysis machines. While aspects like temperature and noise or volume control and fluid pressure are relevant to various aspects of machine operation and comfort, they do not hold the same level of critical importance for patient safety as pressure holding and alarm safety do.