A nurse is planning a low-protein diet for a client who has chronic renal failure.
The client states, "Why do I have to be concerned with protein?". Which of the following responses is appropriate?

Choice A rationale

While vitamin K, found in green leafy vegetables, is essential for the synthesis of clotting factors (II, VII, IX, X), it is relevant to individuals on warfarin therapy. For general deep vein thrombosis (DVT) prevention, the focus is on promoting venous return and preventing stasis, not dietary modification regarding vitamin K, unless a client is on specific anticoagulants.

Choice B rationale

Massaging lower extremities in a client at risk for DVT is contraindicated because it could theoretically dislodge a pre-existing, non-symptomatic clot. Dislodgement can convert the deep vein thrombus into a pulmonary embolus (PE), a life-threatening complication where the clot travels to the pulmonary vasculature, impeding gas exchange.

Choice C rationale

Sequential compression devices (SCDs) use intermittent, pneumatic pressure to cyclically compress the leg, simulating the action of the skeletal muscle pump. This external compression promotes venous blood flow from the superficial to the deep veins, which effectively reduces venous stasis and the associated risk of thrombus formation, a primary mechanism in DVT pathogenesis.

Choice D rationale

Limiting movement of the lower extremities increases venous stasis, which is a key component of Virchow's triad (venous stasis, endothelial injury, hypercoagulability) and a major risk factor for DVT formation. Promoting activity, such as frequent position changes, ambulation, or ankle pumps, is the core physical intervention for preventing DVT.

Choice A rationale

Immobility generally leads to a decreased metabolic rate due to the reduced expenditure of energy for physical activity and muscle contraction. This lowered metabolic demand results in an overall reduction in oxygen consumption and nutrient utilization, often contributing to a negative nitrogen balance and weight loss, but it is not a direct increase.

Choice B rationale

Immobility significantly impairs the skeletal muscle pump mechanism, which normally assists venous return in the lower extremities. This failure results in venous pooling, or stasis, increasing hydrostatic pressure within the capillaries. This stasis elevates the risk for thrombus formation, commonly referred to as deep vein thrombosis (DVT), a potentially fatal complication.

Choice C rationale

Prolonged immobility, particularly in a supine position, hinders the complete emptying of the bladder due to the lack of gravity and ineffective detrusor muscle function. This leads to urinary stasis, where residual urine harbors bacteria, significantly increasing the risk of urinary tract infections (UTIs) and the potential for renal calculi formation due to calcium reabsorption.

Choice D rationale

Immobility, especially in a supine position, restricts the chest wall's excursion and the functional capacity of the diaphragm and intercostal muscles. This leads to decreased depth of respirations, or hypoventilation, which causes the pooling of secretions in the dependent lung fields and elevates the risk for atelectasis and pneumonia.

Choice E rationale

The absence of weight-bearing and regular muscle contraction stimuli due to immobility results in a rapid breakdown of muscle protein, exceeding the rate of synthesis. This physiological response causes muscle atrophy, characterized by a reduction in muscle mass and strength, leading to significant weakness and functional decline over time. 80mm.5pt.