Two days after admission for an exacerbation of chronic obstructive pulmonary disease (COPD), an older client's arterial blood gas (ABC) indicate an acid base imbalance. The client's laboratory results reveal a low hemoglobin level, an elevated creatinine clearance, and decreased urine specific gravity. Which is the most likely cause for the acid base imbalance?

Myocardial infarction one year ago.

Occasional use of antacids.

Chronic renal insufficiency.

Shortness of breath with exertion.

Answer and Explanation

The Correct Answer is C

A. Myocardial infarction one year ago:

A myocardial infarction (MI) that occurred one year ago is not directly related to the current acid-base imbalance described in the scenario. While a history of MI may have implications for the client's overall cardiovascular health and management, it is not the most likely cause of the acid-base imbalance indicated by the laboratory results.

B. Occasional use of antacids:

Occasional use of antacids is unlikely to cause the acid-base imbalance described in the scenario. Antacids primarily work by neutralizing gastric acid and are not typically associated with significant alterations in acid-base status, especially when used intermittently.

C. Chronic renal insufficiency:

Chronic renal insufficiency is the most likely cause of the acid-base imbalance indicated by the laboratory results. A low hemoglobin level suggests anemia, which can occur in chronic kidney disease due to decreased erythropoietin production. An elevated creatinine clearance indicates impaired kidney function, as the kidneys are clearing creatinine at a faster rate than normal. Decreased urine specific gravity suggests the kidneys' inability to concentrate urine properly, which is a common finding in renal insufficiency. Renal insufficiency can lead to metabolic acidosis due to the kidneys' decreased ability to excrete acid and regulate bicarbonate levels.

D. Shortness of breath with exertion:

Shortness of breath with exertion, a symptom commonly seen in COPD exacerbations, is unlikely to directly cause the acid-base imbalance described in the scenario. While respiratory distress can lead to respiratory acidosis, which is characterized by elevated carbon dioxide levels and decreased pH, the laboratory results indicate metabolic rather than respiratory acidosis.

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Correct Answer is B

Explanation

Amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig's disease, is a progressive neurodegenerative disorder affecting motor neurons in the brain and spinal cord. Understanding the pathophysiological process of ALS is crucial for providing accurate information about the disease prognosis to the client. Here's why option B is the correct choice:

A) It occurs as a complication of a spinal cord injury:

This statement is incorrect. ALS is not a complication of a spinal cord injury. While both conditions involve motor neuron dysfunction, they have different etiologies and pathophysiological processes. ALS is characterized by the degeneration of motor neurons in the brain and spinal cord, leading to muscle weakness and atrophy, whereas spinal cord injury results from trauma to the spinal cord.

B) Muscle weakness is progressive, degenerative, and fatal:

Correct. ALS is characterized by progressive degeneration of motor neurons, leading to muscle weakness, atrophy, and eventual paralysis. The disease is relentless and fatal, typically within 2 to 5 years of diagnosis, although survival can vary widely among individuals. As motor neurons degenerate, voluntary muscle control is lost, eventually affecting the ability to speak, swallow, breathe, and move. Respiratory failure is the most common cause of death in ALS patients.

C) Mental status changes occur late in the disease:

While cognitive and behavioral changes can occur in some individuals with ALS, particularly in the later stages of the disease, they are not universal. ALS primarily affects motor neurons, leading to progressive muscle weakness and paralysis. However, some individuals may experience frontotemporal dementia (FTD), a type of cognitive impairment characterized by changes in behavior, personality, and language.

D) Autonomic nervous system and sensory changes occur:

ALS primarily affects motor neurons rather than sensory neurons or the autonomic nervous system. Sensory symptoms such as numbness, tingling, or loss of sensation are not typical features of ALS. Autonomic dysfunction, including changes in heart rate, blood pressure, or bowel and bladder function, is not a prominent feature of ALS.

A. Abnormal growth results in loss of bladder muscle tone. B. Inflammation causes spasms of the gland. C. The enlarged gland compresses the urethra. D. Nerve compression decreases the sensation that the bladder is full

Correct Answer is C

Explanation

Benign prostatic hyperplasia (BPH) is a condition characterized by non-cancerous growth of the prostate gland, leading to its enlargement. This enlargement can contribute to urinary retention by obstructing the flow of urine through the urethra. Here's the breakdown of the explanation:

A) Abnormal growth results in loss of bladder muscle tone:

While BPH can lead to urinary symptoms such as urinary frequency, urgency, and nocturia, it does not directly cause loss of bladder muscle tone. Instead, the enlarged prostate gland obstructs the bladder outlet, making it difficult for urine to pass through the urethra.

B) Inflammation causes spasms of the gland:

Inflammation of the prostate gland, known as prostatitis, can cause symptoms such as pelvic pain, dysuria, and urinary frequency, but it is not typically associated with BPH. BPH is characterized by benign growth of the prostate tissue rather than inflammation and spasms.

C) The enlarged gland compresses the urethra:

Correct. The primary mechanism by which BPH causes urinary retention is by compressing the urethra, which obstructs the flow of urine from the bladder. As the prostate gland enlarges, it can constrict the urethra, leading to symptoms such as hesitancy, weak urinary stream, incomplete emptying, and urinary retention.

D) Nerve compression decreases the sensation that the bladder is full:

While compression of nerves in the pelvic region can contribute to urinary symptoms, such as decreased sensation of bladder fullness, it is not the primary mechanism by which BPH causes urinary retention. The compression of the urethra by the enlarged prostate gland is the main factor leading to urinary obstruction and retention.

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Naxlex Comprehensive Predictor Exams

A client is diagnosed with amyotrophic lateral sclerosis (ALS). Which pathophysiological process should the nurse use when providing the client with information about this disease prognosis?

Correct Answer is B

Explanation

Which explanation should the nurse give to a male client on why benign prostatic hyperplasia (BPH) often causes urinary retention

Correct Answer is C

Explanation

After the nurse obtains a blood sample from a client's right radial arterial client reports a sudden onset of pain at the arterial line insertion site. The nurse recognizes which physiological effect may be inducing the sudden pain?

The nurse is caring for an immobilized client who is at risk for breakdown in skin integrity. Which pathophysiological process should the nurse note early in the development of a pressure injury?

The nurse is caring for a client who is admitted with polycystic kidney disease (PKD), flank pain, and hematuria. The client's blood pressure is 180/100 mm Hg. Which pathophysiological process supports the client's blood pressure finding?

The nurse admits a client with sepsis and has developed cool ecchymotic fingertips and toes. The healthcare provider determines that the client has developed disseminated intravascular coagulation (DIC). Which findings support the pathophysiology of DIC?

A client with chronic osteoarthritis is troubled by knee pain. Which pathophysiological process is contributing to the pain?

What is the inherent rate of the AV (atrioventricular) node area?

A client with end stage emphysema is experiencing poor gas exchange. Which respiratory structure is associated with the pathophysiological processes in emphysema?