Which of the following conditions can lead to muscle atrophy?

A.Vigorous friction is the most critical component of hand hygiene because it mechanically loosens and removes transient microorganisms, soil, and organic matter from the skin. The nurse should rub the palms, the backs of the hands, and between the fingers for at least 15 to 20 seconds. Proper friction ensures that all surfaces are thoroughly decontaminated before the nurse engages in any clinical care.

B.Applying only one small drop of liquid soap may be insufficient to create the necessary lather to cover all surfaces of the hands and wrists. To be effective, the nurse must use an adequate volume of antiseptic or plain soap as recommended by the manufacturer to ensure complete coverage. Insufficient soap leads to inadequate emulsification of fats and oils that harbor pathogens on the skin.

C.Water that is "really hot" can damage the skin's natural protective barrier, leading to dermatitis and increased colonization by bacteria. Hot water also increases the risk of thermal injury and skin sensitivity with frequent washing. The nurse should use comfortably warm water, which is effective for promoting the action of the soap without causing excessive dryness or irritation to the epidermis.

D.Rubbing the hands and arms roughly to dry can cause micro-abrasions and skin breakdown, which provides a portal of entry for infectious agents. Instead, the nurse should pat the skin dry using a clean disposable towel, starting from the fingers and moving toward the forearms. Gentle drying preserves skin integrity and prevents the development of chronic skin conditions associated with frequent hand hygiene.

A.Orthostatic hypotension is clinically defined by a decrease in systolic blood pressure of at least 20 mm Hg within 3 minutes of standing. A drop of 13 mm Hg does not meet the standard diagnostic criteria for this condition in an adult patient. While any drop in pressure is noteworthy, it must reach the 20 mm Hg threshold to be classified as a significant orthostatic event.

B.A diagnosis of orthostatic hypotension requires a decrease in diastolic blood pressure of at least 10 mm Hg when moving from a supine to a standing position. A 5 mm Hg decrease is insufficient to confirm the presence of this vasomotor instability. Accurate measurement is critical for identifying patients whose autonomic nervous systems cannot adequately compensate for gravitational changes in blood distribution.

C.There is no direct physiological link between orthostatic hypotension and the formation of pulmonary emboli. Pulmonary emboli typically result from deep vein thrombosis caused by venous stasis, hypercoagulability, or vessel wall injury. While immobility can cause both conditions, orthostatic hypotension itself is a hemodynamic failure rather than a coagulation disorder that leads to blood clots in the lungs.

D.Orthostatic hypotension significantly increases a client’s risk of a fall because the sudden drop in blood pressure results in transient cerebral hypoperfusion. This lack of oxygenated blood to the brain causes symptoms such as lightheadedness, dizziness, blurred vision, and syncope. These manifestations occur most frequently during position changes, making the patient highly unstable and prone to losing their balance while ambulating.