The nurse is aware the early indicator of hypoxia in the unconscious client is:

A. While osteoporosis is characterized by a negative calcium balance, this is not a major complication itself. It's a contributing factor to the condition.
B. Loss of estrogen is a risk factor for osteoporosis, especially in postmenopausal women. However, it's not a complication of the disease itself.
C. Dowager's hump, or kyphosis, is a common symptom of osteoporosis, but it's not a major complication. It's a visible manifestation of the disease.
D. Bone fractures are the major complication of osteoporosis. The weakened bones become more susceptible to fractures, especially in areas like the hip, spine, and wrist.

A. Kidney disease is one of the most common causes of secondary hypertension. Conditions such as chronic kidney disease or renal artery stenosis can lead to increased blood pressure due to fluid retention or increased renin production.
B. While pain can cause temporary increases in blood pressure due to the body's stress response, it is not an identifiable cause of secondary hypertension. Pain-related hypertension is usually acute and resolves once the pain is managed, rather than being a chronic condition.
C. Glaucoma is an eye condition characterized by increased intraocular pressure, but it is not a cause of hypertension. Although systemic hypertension can affect eye health, glaucoma itself does not cause secondary hypertension. Therefore, this is not an identifiable cause.
D. Anemia does not directly cause secondary hypertension. While severe anemia can sometimes result in compensatory mechanisms that might elevate blood pressure, it is not a recognized or direct cause of secondary hypertension. Thus, it is not a primary concern in this context.