A client's ankle is edematous after an ankle sprain. Which physiological mechanism is responsible for the swelling?

Histamine-mediated vascular permeability leading to fluid transudation.

Bradykinin cascade resulting in the accumulation of substance P.

Thromboxane A activation of chemical mediators.

Neutrophil migration secondary to chemotaxis.

Answer and Explanation

The Correct Answer is A

A) Histamine-mediated vascular permeability leading to fluid transudation:

Correct. Ankle edema following an ankle sprain is often due to inflammation and increased vascular permeability. Histamine, released from mast cells and basophils during the inflammatory response, causes vasodilation and increases vascular permeability. This leads to the leakage of fluid from the blood vessels into the surrounding tissues, resulting in edema.

B) Bradykinin cascade resulting in the accumulation of substance P:

While bradykinin is involved in the inflammatory response and can contribute to pain and vasodilation, it does not directly cause fluid transudation leading to edema in the context of an ankle sprain.

C) Thromboxane A activation of chemical mediators:

Thromboxane A is involved in platelet aggregation and vasoconstriction rather than increasing vascular permeability and edema formation.

D) Neutrophil migration secondary to chemotaxis:

Neutrophil migration is part of the inflammatory response and can contribute to tissue damage and inflammation, but it is not the primary mechanism responsible for the development of edema following an ankle sprain.

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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.

A. Arterial blood pH 7.5 and bicarbonate level 32 mEq/L (32 mmol/L). B. Arterial blood pH 7.42 and bicarbonate level 18 mEq/L (18 mmol/L). C. Arterial blood pH 7.25 and bicarbonate level 10 mEq/L (10 mmol/L). D. Arterial blood pH 7.38 and bicarbonate level 29 mEq/L (29 mmol/L).

Correct Answer is C

Explanation

DKA is a serious complication of diabetes mellitus characterized by hyperglycemia, ketosis, and metabolic acidosis. The laboratory results consistent with DKA include:

Elevated blood glucose level: A blood glucose level of 525 mg/dL (28 mmol/L) is significantly elevated and consistent with DKA.

Low arterial blood pH: A decreased arterial blood pH indicates acidosis, which is characteristic of DKA. Normal arterial blood pH ranges from 7.35 to 7.45.

Low bicarbonate (HCO3-) level: A low bicarbonate level indicates metabolic acidosis, which is also characteristic of DKA. Normal bicarbonate levels range from 21 to 28 mEq/L (21 to 28 mmol/L).

Among the options provided:

A) Arterial blood pH 7.5 and bicarbonate level 32 mEq/L (32 mmol/L):

This pH and bicarbonate level are indicative of alkalosis, which is not consistent with DKA.

B) Arterial blood pH 7.42 and bicarbonate level 18 mEq/L (18 mmol/L):

This pH is within the normal range, and the bicarbonate level is slightly decreased but not indicative of metabolic acidosis consistent with DKA.

C) Arterial blood pH 7.25 and bicarbonate level 10 mEq/L (10 mmol/L):

Correct. This pH is decreased, indicating acidosis, and the bicarbonate level is significantly below the normal range, consistent with metabolic acidosis characteristic of DKA.

D) Arterial blood pH 7.38 and bicarbonate level 29 mEq/L (29 mmol/L):

While the pH is within the normal range, the bicarbonate level is elevated, which is not consistent with metabolic acidosis seen in DKA.

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A client's ankle is edematous after an ankle sprain. Which physiological mechanism is responsible for the swelling?

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Naxlex Comprehensive Predictor Exams

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

Correct Answer is C

Explanation

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A client's ankle is edematous after an ankle sprain. Which physiological mechanism is responsible for the swelling?