A client is suffering from osteoarthritis in the knees and the nurse is providing care. The nurse is assessing the client's pain level and pain tolerance. Based on the nurse's understanding of pain, the nurse knows that a client's pain tolerance is most likely relieved by which of the following?

Respiratory acidosis is a primary acid-base imbalance that occurs when there is an excess of carbon dioxide (CO2) in the body due to impaired ventilation or inadequate removal of CO2 from the lungs. In this case, Colleen's depressed ventilation, indicated by shallow and slow respirations, can lead to inadequate elimination of CO2 from her body. The excessive CO2 levels can result in an accumulation of carbonic acid (H2CO3) in the blood, leading to an increase in acidity and a decrease in pH.

The profuse bleeding from both ears indicates a potential head injury, which can lead to decreased neurological function and impaired control over the respiratory center in the brain. This can further contribute to depressed ventilation and the development of respiratory acidosis. Metabolic acidosis, characterized by a decrease in bicarbonate (HCO3-) levels or an increase in non-carbonic acids in the blood, is not the primary acid-base imbalance in this case since the scenario does not provide information indicating a primary metabolic disorder. Respiratory alkalosis, characterized by decreased levels of CO2 in the blood, leading to increased pH and alkalinity, is not the primary acid-base imbalance in this case. The depressed ventilation and associated increase in CO2 levels indicate the opposite, respiratory acidosis. Metabolic alkalosis, characterized by an increase in bicarbonate levels or a decrease in non-carbonic acids, is not the primary acid-base imbalance in this case as the scenario does not provide information indicating a primary metabolic disorder.

Loop diuretics, such as furosemide, are known to cause potassium loss as they increase urine output. A potassium level of 1.5 mEq/L indicates severe hypokalemia (low potassium levels), which can be potentially dangerous and lead to various complications, including cardiac arrhythmias.

Hence, it is important to hold the dose of the loop diuretic and notify the physician so that appropriate interventions can be taken to address the low potassium level, such as prescribing potassium supplementation or adjusting the dosage of the loop diuretic.

A sodium level of 144 is within the normal range (135-145 mEq/L) and does not require immediate action.

A blood pressure of 102/78, although it may indicate hypotension, does not necessarily require holding the dose of the loop diuretic unless it is accompanied by other significant symptoms or clinical concerns.

A calcium level of 9 mg/dL falls within the normal range (8.5-10.5 mg/dL) and does not necessitate holding the loop diuretic dose.