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Oxygen therapy is an essential nursing intervention for patients experiencing low oxygen levels, medically known as hypoxemia. Using supplemental oxygen helps elevate oxygen saturation in the blood, providing immediate relief from symptoms such as breathlessness and headache. In this scenario, the client's oxygen saturation is at 91%, which is below the normal range of 95-100% for a healthy individual. Administering oxygen at 2 liters per minute (L/min) via nasal cannula is a standard initial approach. This method is relatively non-invasive and effective for delivering a controlled amount of oxygen. Always reassess the client after administering oxygen to ensure improvement in oxygen saturation and overall respiratory status.

Managing respiratory distress involves several critical nursing interventions. First, assess the patient's respiratory rate, depth, and effort. In this example, auscultation reveals wheezing, suggesting airway constriction. Positioning the client in high Fowler's (sitting up at a 90-degree angle) can help ease breathing by allowing the diaphragm to expand more fully. However, because the primary concern is low oxygen saturation, the priority intervention is to administer supplemental oxygen. Other supportive actions may include encouraging the client to cough to clear mucus or using bronchodilators if prescribed. Monitoring the patient closely for changes in symptoms or deterioration is vital.

Assessing vital signs is one of the core responsibilities in nursing care. Vital signs include heart rate, blood pressure, respiratory rate, and temperature, along with oxygen saturation. In this exercise, noting that the client's oxygen level is 91% triggers immediate concern. A comprehensive assessment should follow, checking for additional symptoms like cyanosis (bluish color of the skin), altered mental status, or abnormal lung sounds (wheezing, crackles). Regular monitoring helps in early detection of changes and prompt intervention. Record these vital signs accurately and report any significant findings to the healthcare provider for further assessment.

Prioritizing client care ensures that the most critical needs are addressed first. In cases of respiratory distress, adequate oxygenation is paramount as it affects every organ system. In this scenario, options like asking the client to cough or offering pain medication for the headache are secondary to administering oxygen. The key is to identify interventions that will stabilize the client quickly and effectively. Prioritizing actions that improve breathing and oxygenation takes precedence over less urgent measures. Always use clinical judgment and follow established protocols and guidelines to ensure optimal client outcomes.