The nurse is assessing the functioning of a chest tube drainage system in a patient with a chest injury who has just returned from the recovery room following a thoracotomy with wedge resection.
What are the expected assessment findings?

Choice A rationale

Sedating the patient immediately without assessing the cause of agitation is a dangerous action. Agitation could be a sign of a serious, reversible condition such as hypoxia, a disconnected ventilator circuit, or a pneumothorax. Masking these symptoms with sedation could delay the diagnosis and treatment of a life-threatening problem. The priority is to first investigate the cause of the patient's distress to ensure their safety and provide appropriate, targeted care.

Choice B rationale

Reassuring the patient is a good practice, but it is not the most appropriate initial action. While it may help calm the patient, it does not address potential underlying physiological causes for the agitation, such as hypoxemia or a ventilator malfunction. The priority is to first perform a comprehensive physical assessment and a check of the ventilator to rule out critical, life-threatening issues before attempting to address the patient's emotional state with verbal reassurance.

Choice C rationale

Restraining the patient should be a last resort after other interventions have failed to address the cause of agitation. It can increase the patient's anxiety and is a significant safety and legal concern. Restraints can also obstruct the nurse's ability to assess the patient thoroughly and may worsen the patient's condition if the underlying cause is not identified. The priority is always to determine and treat the source of the agitation first.

Choice D rationale

Agitation in a ventilated patient is a critical sign that something is wrong, and it requires immediate investigation to determine the cause. The nurse should systematically assess the patient, starting with the ventilator circuit for disconnections or alarms, checking vital signs for hypoxia or hypotension, and auscultating lung sounds. This assessment-first approach ensures that serious, reversible causes are identified and addressed promptly, preventing harm to the patient.

Choice A rationale

While obtaining a complete history is important for diagnosis, it is not the immediate priority. The patient's altered mental status, chest pain, and chills suggest a serious infectious or cardiopulmonary process like pneumonia, which can rapidly progress. Delaying the assessment of vital signs and oxygen saturation to gather a detailed history could be detrimental, as the patient's condition may worsen during that time.

Choice B rationale

Providing a pneumococcal vaccine is a prophylactic measure for pneumonia prevention. While potentially relevant for a patient at risk for or diagnosed with pneumonia, it is not an immediate life-saving intervention. The priority is to assess and stabilize the patient's current condition, not to prevent a future illness. Vaccination is a secondary intervention once the patient is stabilized.

Choice C rationale

The nursing priority in this situation is to obtain baseline vital signs and oxygen saturation. The patient's symptoms of altered mental status, chest pain, and chills are red flags for a serious cardiopulmonary condition like pneumonia. Assessing vital signs, including oxygen saturation, provides crucial data to determine the severity of the illness and guide immediate interventions to stabilize the patient's condition. Normal oxygen saturation is 95-100%.

Choice D rationale

Obtaining a sputum culture is a diagnostic procedure used to identify the causative organism of a respiratory infection. While an important step for guiding targeted antibiotic therapy, it is not the nursing priority. Sputum collection can be time-consuming, and the results are not immediately available. The priority is to assess the patient's current physiological status and provide supportive care, such as oxygen, if needed, based on the vital signs