Nursing Fundamentals Clinical Concepts Review

A nasal cannula typically delivers oxygen at flow rates ranging from 1 to 6 liters per minute. At 4 liters per minute, it provides an adequate concentration of oxygen for patients requiring supplemental oxygen while ensuring comfort and minimizing the risk of drying the nasal passages. Higher flow rates can lead to discomfort and are generally not recommended for long-term use. Hence, 4 liters is considered a standard and effective maximum flow rate for a nasal cannula in most clinical situations.

When inserting a nasogastric (NG) tube, the nurse measures from the tip of the nose to the earlobe and then down to the xiphoid process to ensure the tube is of appropriate length for proper placement. This measurement helps to avoid complications, such as incorrect positioning in the lungs or stomach, ensuring that the tube reaches the stomach safely and effectively. The earlobe serves as a crucial anatomical landmark in this measurement process.

Before ambulating a patient, it is essential to assess their muscular strength to ensure they can support themselves. Asking if the patient feels dizzy helps identify any potential risks of falls. Allowing the patient to dangle their legs for a minute helps them acclimate to an upright position, reducing the chance of dizziness or fainting. While applying a gait belt and walking on the patient's strong side are important safety measures during ambulation, they come after these initial assessments and preparations.

A G-tube residual of 200 ml or more suggests that the stomach is not emptying effectively, indicating potential issues with digestion or absorption. This can be a sign of delayed gastric emptying, which may lead to complications such as aspiration or inadequate nutrient intake. Monitoring residuals helps healthcare providers assess the patient's tolerance to feedings and adjust treatment plans accordingly to ensure proper nutrition and prevent further complications.

A dehydrated client exhibits a combination of clinical manifestations due to decreased fluid volume in the body. Dark or amber urine indicates concentrated urine as the kidneys conserve water. Dry mucus membranes reflect insufficient hydration. Low blood pressure and tachycardia occur as the heart works harder to maintain circulation with reduced blood volume. A capillary refill time greater than 3 seconds suggests poor peripheral perfusion, often linked to dehydration. Collectively, these signs indicate significant fluid deficit, making "all of the above" correct in identifying the manifestations of dehydration.

Sublingual medications are designed to be absorbed quickly into the bloodstream through the tissues under the tongue. Instructing the patient to let the medicine dissolve on its own ensures that the medication can effectively penetrate the mucous membranes without being swallowed or disrupted, which could reduce its efficacy. This method allows for rapid onset of action, making it a preferred route for certain medications.

Contact precautions are used for patients with infections like C-Diff or MRSA because these pathogens can spread through direct or indirect contact with contaminated surfaces or materials. This isolation method involves wearing gloves and gowns when entering the patient's room and ensuring proper hand hygiene to prevent the transmission of these resistant bacteria. Airborne and droplet precautions are not necessary for these specific infections, while reverse isolation is used to protect immunocompromised patients rather than to isolate those with infections.