A client's morning laboratory test results include hemoglobin 11.0 g/dL (110 g/L) and hematocrit 34% (0.34 volume fraction). Based on these findings, this client is at risk for which pathophysiological findings?

Reference Ranges:

Hemoglobin [14 to 18 g/dL (140 to 180 g/L)]

Hematocrit [42% to 52% (0.42 to 0.52 volume fraction)]

Intermittent claudication is a common symptom experienced by individuals with peripheral artery disease (PAD). It occurs due to the underlying pathophysiology of arterial occlusion and ischemia during physical activity. Here's why option C is the correct choice:

A) Reduced blood flow occurs when legs are elevated:

This statement is not accurate regarding the pathophysiology of intermittent claudication in PAD. When legs are elevated, gravity assists venous return, which may actually improve blood flow temporarily. However, intermittent claudication occurs during activity, not when the legs are elevated.

B) Reddened color occurs when the feet are dependent:

This statement is unrelated to the pathophysiology of intermittent claudication. Redness when the feet are dependent may suggest venous insufficiency rather than arterial occlusion characteristic of PAD.

C) Arterial occlusion causes ischemic pain during activity:

Correct. Intermittent claudication is caused by inadequate blood flow to the muscles during physical activity due to arterial occlusion in PAD. As the demand for oxygen increases during exercise, the narrowed arteries cannot supply sufficient blood flow, leading to ischemic pain in the affected muscles. This pain typically resolves with rest and recurs upon resuming activity.

D) Reduction in blood supply leads to muscle atrophy:

Muscle atrophy may occur in severe cases of PAD with chronic ischemia, but it is not the primary cause of intermittent claudication. Intermittent claudication is primarily attributed to inadequate blood flow during activity, which results in ischemic pain rather than muscle atrophy.

Renal calculi, also known as kidney stones, are solid masses made up of crystals that form in the kidneys due to various factors, including supersaturation of urine with stone-forming substances, inadequate urine volume, and conditions that promote crystal precipitation and retention in the urinary tract. Here's the breakdown of the pathological process contributing to the client's clinical presentation:

A) Excessive urine output:

Excessive urine output (polyuria) is not typically associated with the formation of renal calculi. In fact, low urine output (oliguria) or concentrated urine may increase the risk of stone formation by reducing the volume of urine available to dilute stone-forming substances.

B) Excessive fluid intake:

Excessive fluid intake is generally beneficial in preventing kidney stone formation by increasing urine volume and diluting stone-forming substances. Therefore, it is not likely to contribute to the development of renal calculi in this scenario.

C) Increased calcium reabsorption:

Correct. Increased calcium reabsorption in the renal tubules can lead to hypercalcemia and hypercalciuria, which are risk factors for the formation of calcium-containing kidney stones (calcium oxalate or calcium phosphate stones). Excessive calcium reabsorption may occur due to various factors, including hormonal imbalances (e.g., hyperparathyroidism) or medications that affect calcium metabolism.

D) Increased serum alkalinity:

Increased serum alkalinity (alkalosis) is not typically associated with the formation of renal calculi. Urinary pH may influence the formation of certain types of kidney stones (e.g., uric acid stones are more likely to form in acidic urine), but alkalosis alone is not a primary factor in stone formation.