Which of the following actions should a medical assistant take to adhere to hand hygiene guidelines?

A. Alternating current (AC) interference: AC interference is caused by electrical equipment near the EKG machine and appears as uniform, small, rapid spikes. It is not caused by patient movement.
B. Arrhythmia: An arrhythmia refers to an abnormal heart rhythm and is related to cardiac function, not patient movement.
C. Somatic tremor: Somatic tremor is caused by voluntary or involuntary muscle movement, such as a patient moving their arm, which creates artifact on the EKG tracing that appears as irregular, erratic spikes.
D. Interrupted baseline: An interrupted baseline occurs when the electrical connection is lost, often due to a lead falling off, not due to patient movement.

A. Colonoscopy: A colonoscopy is an invasive procedure that requires written informed consent due to the associated risks and the need for detailed patient understanding.
B. Dilation and curettage: Dilation and curettage (D&C) is an invasive procedure requiring written informed consent, including an explanation of risks, benefits, and alternatives.
C. Venipuncture: For venipuncture, verbal consent is generally sufficient, as it is a minor procedure with minimal risk.
D. Cardiac stress test: A cardiac stress test, while less invasive, typically requires written informed consent due to potential risks and the need for patient understanding.