A client receives a prescription for vancomycin 500 mg IV every 8 hours. The medication is provided in "500 mg per 100 ml" of dextrose 5% in water.
To administer the medication over an hour, the nurse should set the infusion pump to deliver how many mL/hr?

Choice B rationale:

Gravity Facilitates Drainage:

Positioning the patient strategically utilizes gravity to encourage the flow of fluids and secretions away from the surgical site. This aids in preventing fluid accumulation and potential infection.

Reduces Pressure on Surgical Site:

Certain positions can minimize pressure on the incision and internal organs, promoting healing and reducing discomfort.

This is particularly important for patients with comorbidities like hypertension and heart failure, as they may have impaired wound healing and be more susceptible to respiratory complications.

Enhances Respiratory Function:

Specific positions can improve lung expansion and ventilation, which is essential for patients with a history of heart failure or respiratory issues.

This helps prevent atelectasis (collapsed lung areas) and pneumonia, which are common postoperative risks.

Common Post-Cholecystectomy Positions:

Semi-Fowler's Position:

The head of the bed is elevated 30-45 degrees, with knees slightly bent.

This position eases breathing, reduces pressure on the incision, and promotes drainage of fluids. Right Side-Lying Position:

The patient lies on their right side with a pillow between their knees.

This position encourages drainage from the liver and gallbladder, aiding in bile flow. Left Side-Lying Position:

The patient lies on their left side with a pillow between their knees.

This position promotes drainage from the stomach and pancreas, assisting in digestion. Supine Position:

The patient lies flat on their back with a pillow under their knees.

This position may be used for short periods, but prolonged supine positioning can increase pressure on the incision and lungs. High Fowler's Position:

The head of the bed is elevated 60-90 degrees, with knees slightly bent.

This position is often used for patients with respiratory issues or difficulty breathing, as it improves lung expansion.

Choice C rationale:

Performing drainage immediately after meals aids in efficient removal of bile and gastric secretions, preventing complications such as:

Bile Reflux:

Delayed drainage can cause bile to back up into the stomach, leading to nausea, vomiting, and discomfort. Infection:

Accumulation of fluids in the surgical site can increase the risk of bacterial growth and infection. Pancreatitis:

In rare cases, delayed drainage can cause inflammation of the pancreas due to obstruction of the pancreatic duct.

I'll address the rationales for choices A and D in the following sections.

Choice A rationale:

Carbon dioxide is primarily eliminated through the lungs, not the kidneys. While the kidneys do play a role in acid-base balance, their primary mechanism for regulating pH is through the excretion or retention of bicarbonate ions (HCO3-), not carbon dioxide itself.

The kidneys' ability to compensate for respiratory acidosis is limited. In cases of severe respiratory acidosis, the kidneys may not be able to adequately compensate, leading to a further decrease in blood pH.

Choice B rationale:

Hyperventilation would actually decrease carbon dioxide levels in the blood, not increase them. Hyperventilation is a state of rapid, deep breathing that leads to increased exhalation of carbon dioxide. This can result in respiratory alkalosis, which is the opposite of respiratory acidosis.

Choice D rationale:

Low blood oxygen levels (hypoxia) can stimulate respiration, but this would not directly cause respiratory acidosis. In fact, hypoxia can sometimes lead to respiratory alkalosis due to hyperventilation.

Respiratory acidosis is primarily caused by impaired carbon dioxide elimination, not decreased oxygen levels.

Choice C rationale:

High levels of carbon dioxide in the blood (hypercapnia) are the hallmark feature of respiratory acidosis. This can occur due to a variety of factors that impair ventilation, such as:

Chronic obstructive pulmonary disease (COPD) Asthma

Pneumonia Sleep apnea

Neuromuscular disorders that affect breathing Drug overdose (e.g., opioids)

The accumulation of carbon dioxide in the blood leads to a decrease in blood pH, which can have a range of negative effects on the body's organ systems.