A client recovering from cardiac surgery experiences a dysrhythmia, noted on the telemetry monitor. Which assessment finding is most likely to have contributed to the development of the dysrhythmia?

Reference Range:

Total Calcium [8.4 to 10.6 mg/dL (2.10 to 2.50 mmol/L)]

Sodium [136 to 145 mEq/L (136 to 145 mmol/L)]

Potassium (K+) [3.5 to 5.0 mEq/L (3.5 to 5.0 mmol/L)]

Calcium level 7.2 mg/dL (1.8 mmol/L).

Potassium level 3.8 mg/dl. (3.8 mmol)

Sodium level 140 mEq/L (140mmol/L).

Oxygen saturation level 97%.

Answer and Explanation

The Correct Answer is A

A.   This calcium level is below the normal reference range (8.4 to 10.6 mg/dL or 2.10 to 2.50 mmol/L), indicating hypocalcemia. Calcium plays a crucial role in cardiac muscle contraction and electrical conduction. Low calcium levels can lead to various cardiac dysrhythmias, including prolonged QT intervals and increased risk of ventricular arrhythmias.

B.   This potassium level falls within the normal range (3.5 to 5.0 mEq/L or 3.5 to 5.0 mmol/L). Potassium is essential for maintaining normal cardiac rhythm, but a level of 3.8 mg/dL is not abnormal and, therefore, is less likely to be the cause of a dysrhythmia compared to abnormal levels.
C.   This sodium level is within the normal reference range (136 to 145 mEq/L or 136 to 145 mmol/L). Sodium levels typically do not directly cause dysrhythmias unless they are extremely high or low, which is not the case here. Thus, a sodium level of 140 mEq/L is not likely to be the primary contributor to the dysrhythmia.
D.   This oxygen saturation level is considered normal (95% to 100%). While oxygenation is critical for overall heart function and can influence cardiac health, a saturation level of 97% is not likely to be a direct cause of a dysrhythmia, especially if it falls within the normal range.

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Correct Answer is C

Explanation

A. While assessing peripheral pulses is important, it's not the priority in this situation. The primary concern is the rectal bleeding.
B. These exercises are important to prevent postoperative complications like pneumonia, but they are not the immediate priority when a patient is experiencing rectal bleeding.
C. Assessing the abdomen will help determine the severity of the bleeding, identify any signs of abdominal distention or tenderness, and provide crucial information for further interventions.
D. Monitoring fluid intake and output is important for any patient, but it's not the initial priority when a patient is actively bleeding.

A. Obtain current vital signs. B. Measure abdominal girth. C. Observe for flushing D. Auscultate breath sounds.

Correct Answer is A

Explanation

A. Vital signs are critical for assessing the client’s current hemodynamic status. Coffee-ground emesis can indicate gastrointestinal bleeding, which might lead to complications like hypovolemia or shock.

Vital signs can provide essential information about the client’s condition and help determine the urgency of intervention. Checking vital signs is a priority in assessing the severity of the situation and guiding further actions.
B. Measuring abdominal girth is useful in assessing for abdominal distention or fluid accumulation, which can be relevant in some gastrointestinal conditions. However, in the immediate context of coffee- ground emesis, the most urgent concern is evaluating the client's hemodynamic stability rather than focusing on abdominal girth.
C. Flushing of the skin might be relevant in certain contexts (e.g., reactions to medications or infections), but it is not directly related to the immediate concern of gastrointestinal bleeding and the client’s hemodynamic status. It is less critical compared to assessing vital signs in this situation.
D. While auscultating breath sounds is important for evaluating respiratory status and detecting any pulmonary complications, it is not the immediate priority in the context of coffee-ground emesis. The primary concern should be assessing for signs of hemodynamic instability that may result from gastrointestinal bleeding.

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