A 65-year-old male patient presents with sudden onset of oliguria and signs of dehydration His blood pressure is 90/60 mmHg, heart rate is 110 bpm and he has poor skin turgor. Laboratory results show elevated blood urea nitrogen (BUN and creatinine levels. Which of the following is the most likely cause of his acute kidney injury (AKI)?
Hypovolemia leading to decreased renal perfusion
Acute tubular necrosis
Urinary tract obstruction
Chronic kidney disease
The Correct Answer is A
A. Hypovolemia leading to decreased renal perfusion. Hypovolemia from dehydration and low blood pressure reduces blood flow to the kidneys, resulting in pre-renal AKI, characterized by elevated BUN and creatinine.
B. Acute tubular necrosis. Acute tubular necrosis may cause AKI but is often due to prolonged hypoperfusion, nephrotoxic drugs, or ischemia, not the immediate presentation seen here.
C. Urinary tract obstruction. A urinary tract obstruction leads to post-renal AKI, often with symptoms like flank pain or difficulty urinating, not dehydration and low blood pressure.
D. Chronic kidney disease. Chronic kidney disease is a long-term condition and would not cause the acute symptoms or sudden onset of AKI as seen in this patient.
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Correct Answer is C
Explanation
A. Encourage the client to walk on the injured ankle to promote circulation. Weight-bearing activities should be avoided initially after a Grade II sprain to prevent further injury.
B. Immerse the ankle in warm water immediately after the injury. Ice, rather than warmth, is recommended immediately following an injury to reduce swelling and inflammation.
C. Apply ice to the affected ankle for the first 24-72 hours. Applying ice for 24-72 hours helps reduce swelling and pain by causing vasoconstriction and controlling inflammation in the acute phase.
D. Perform deep tissue massage on the injured area to reduce pain. Massaging a newly sprained ankle can aggravate inflammation and cause additional tissue damage.
Correct Answer is A
Explanation
A. Otosclerosis. Otosclerosis is a common cause of conductive hearing loss, typically due to abnormal bone growth around the stapes in the middle ear.
B. Acoustic neuroma. Acoustic neuroma is associated with sensorineural hearing loss, not conductive hearing loss.
C. Meniere's disease. Meniere's disease usually causes sensorineural hearing loss, often accompanied by vertigo and tinnitus.
D. Presbycusis. Presbycusis is age-related sensorineural hearing loss and does not result in conductive hearing loss.