A client has suffered a head injury which is affecting the brainstem.
What is located in the brainstem that may affect respiratory function?
Chemoreceptors.
Oxygen center.
Stretch receptors.
Respiratory center.
The Correct Answer is D
Choice A rationale
Chemoreceptors are specialized sensors that detect changes in the levels of carbon dioxide, oxygen, and pH in the blood. While central chemoreceptors are located in the medulla oblongata, they function as inputs to the respiratory system rather than being the system itself. They provide the necessary data that the brain uses to adjust breathing, but the integration and generation of the respiratory rhythm occur within the respiratory center, making the center the more comprehensive anatomical answer.
Choice B rationale
There is no anatomical structure formally known as the oxygen center in the brainstem. The regulation of breathing is a complex process involving multiple groups of neurons that respond to various chemical and mechanical signals. Using the term oxygen center is scientifically inaccurate and oversimplifies the complex neurological control of ventilation, which is primarily driven by carbon dioxide levels and pH balance rather than solely by the concentration of oxygen in the arterial blood.
Choice C rationale
Stretch receptors are located in the smooth muscle of the airways and the visceral pleura, not primarily within the brainstem itself. These receptors are part of the Hering-Breuer reflex, which prevents over-inflation of the lungs by sending inhibitory signals to the medulla via the vagus nerve. While they interact with the brainstem to modulate the breathing cycle, they are peripheral components of the respiratory control system rather than being located within the brainstem structure.
Choice D rationale
The respiratory center is located in the medulla oblongata and the pons of the brainstem. It consists of several groups of neurons, including the dorsal and ventral respiratory groups, which coordinate the rhythm and depth of breathing. Damage to the brainstem can disrupt these vital centers, leading to irregular breathing patterns or total respiratory arrest. This center integrates chemical, emotional, and physical signals to ensure that gas exchange meets the metabolic demands of the body.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Encouraging the client to keep trying to speak while the tracheostomy tube is in place and the cuff is inflated can lead to extreme frustration and physical exhaustion. Because air is diverted through the tube rather than passing over the vocal cords, vocalization is physiologically impossible or severely muffled for many. Forcing the effort without a speaking valve can cause unnecessary stress and anxiety for a patient already dealing with a compromised airway.
Choice B rationale
Avoiding communication is detrimental to the patient's psychological well-being and safety. Clients with tracheostomies are often highly anxious due to their inability to vocalize needs or fears. Neglecting communication can lead to feelings of isolation, helplessness, and the potential for life-threatening needs to go unaddressed. A nurse must prioritize finding ways to maintain a connection to ensure the patient feels heard, safe, and involved in their own plan of care.
Choice C rationale
Providing alternative communication methods is the standard of care for patients with expressive barriers. Using tools like whiteboards, picture boards, or simple hand gestures allows the patient to convey urgent needs, such as pain or difficulty breathing, effectively. This intervention reduces patient anxiety and empowers them to participate in their care. It also ensures that the nursing staff can accurately assess the patient's condition despite the temporary loss of verbal speech capabilities.
Choice D rationale
While the family can provide emotional support, the nurse should not rely on them as the primary interpreters of clinical needs. The nurse is responsible for establishing a direct and reliable communication channel with the patient to ensure accurate assessment and safety. Relying on third parties can lead to misinterpretations of the patient's symptoms or desires. Direct communication tools ensure the patient's autonomy is respected and that the information gathered is medically reliable and timely.
Correct Answer is D
Explanation
Choice A rationale
Delegation requires the nurse to provide an appropriate level of supervision regardless of the delegatee's perceived experience level. Professional nursing standards dictate that the delegating nurse must monitor the performance of the task to ensure it is completed safely. Assuming that an experienced delegate requires no oversight is a breach of safety protocols and professional responsibility. Continuous evaluation is necessary to maintain high quality care and to intervene if the clinical situation changes unexpectedly.
Choice B rationale
While the nurse transfers the authority to perform a specific task to a competent individual, they do not transfer professional accountability. The delegate becomes responsible for the actual performance of the action, but the registered nurse remains legally and professionally liable for the decision to delegate. Accountability involves being answerable for the outcomes of the nursing care provided. This distinction is vital in maintaining the integrity of nursing practice and ensuring patient safety remains the priority.
Choice C rationale
This statement is incorrect because delegation does not absolve the nurse of their professional duties. The nurse must continue to assess the patient, evaluate the effectiveness of the delegated task, and ensure the task was performed correctly. If a nurse believes they are no longer responsible, it creates a gap in the continuity of care and increases the risk of adverse events. Ongoing engagement with the delegate and the patient is required until the care is complete.
Choice D rationale
Accountability is the hallmark of professional nursing practice during the delegation process. The nurse uses clinical judgment to determine which tasks are appropriate for delegation based on the complexity of the patient's needs and the competency of the staff. Even after the task is assigned, the nurse must ensure the outcome meets the standard of care. This involves reviewing results, providing feedback, and documenting the final result of the delegated action in the medical record.
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