In the conduction system of the heart, which of the following components is stimulated after the sinoatrial node?
Left bundle branch
Purkinje fibers
Right bundle branch
Atrioventricular node
The Correct Answer is D
A. Left bundle branch: The left bundle branch is stimulated after the atrioventricular node and bundle of His, not immediately after the sinoatrial node.
B. Purkinje fibers: The Purkinje fibers are stimulated later in the conduction pathway, after the bundle branches.
C. Right bundle branch: The right bundle branch is also stimulated after the atrioventricular node and bundle of His.
D. Atrioventricular node: After the sinoatrial node initiates the heartbeat, the electrical impulse travels to the atrioventricular node, which then passes the signal to the bundle of His and down to the bundle branches.
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Correct Answer is B
Explanation
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B. Using alcohol-based hand sanitizer with at least 60% alcohol: The CDC recommends using alcohol-based hand sanitizers with at least 60% alcohol for effective hand hygiene.
C. Washing visibly soiled hands with soap and water for 3 to 5 min: Hand washing should be performed for 20 seconds with soap and water, not 3 to 5 minutes. The duration mentioned is excessive and not in line with standard guidelines.
D. Artificial nails without cracks or chips: The CDC advises against wearing artificial nails when providing patient care, as they can harbor bacteria and pose an infection risk.
Correct Answer is D
Explanation
A. Sterile needle holder: A sterile needle holder is used in suturing, not for removing sutures, making it unnecessary for suture removal.
B. 1-mL syringe with an 18-gauge needle: This is used for injections, not for removing sutures. It is not required for a suture removal procedure.
C. 4-by-4-inch benzalkonium wipes: Benzalkonium wipes are used for skin antisepsis, but they are not specifically required for suture removal. While antiseptic wipes are useful, they are not essential for the procedure itself.
D. Sterile thumb dressing forceps: Sterile thumb dressing forceps are necessary for grasping and removing sutures safely without causing trauma to the wound. They are an essential tool for suture removal.