A 17-year-old student enters the emergency department with a nosebleed that won't quit. Which of the following positions is recommended for the patient with a nosebleed?

Correct Answer: D

Rationale: The recommended position for a patient with a nosebleed is sitting up and leaning slightly forward. This position helps prevent blood from flowing down the back of the throat, which can cause gagging, choking, or vomiting. Leaning forward also helps to prevent blood from accumulating in the sinuses, reducing the risk of aspiration. Additionally, this position allows easy access to apply pressure to the nostrils to help stop the bleeding. It is essential to avoid lying down or tilting the head back, as this can lead to swallowing blood and potentially cause further complications.

Correct Answer: C

Rationale: During heparin therapy, the laboratory test that is monitored is the partial thromboplastin time (PTT). Heparin acts by potentiating the activity of antithrombin III, leading to the inhibition of both thrombin and factor Xa. The PTT measures the intrinsic pathway of coagulation and is prolonged with heparin due to its anticoagulant effect. Monitoring the PTT helps to ensure that the patient is within the therapeutic range of anticoagulation to prevent clot formation without increasing the risk of bleeding complications. Plasma fibrinogen, prothrombin time (PT), and international normalized ratio (INR) are not routinely monitored during heparin therapy.

Correct Answer: A

Rationale: The function of macrophages and neutrophils is primarily phagocytosis, which is the process of engulfing and digesting pathogens such as bacteria, virus-infected cells, and cellular debris. Phagocytosis is a crucial defense mechanism of the immune system as it helps eliminate harmful invaders and promote tissue repair. Macrophages and neutrophils play key roles in innate immunity by recognizing, ingesting, and destroying pathogens to protect the body from infections.

Correct Answer: D

Rationale: Allergic rhinitis is a condition characterized by inflammation of the nasal passages caused by exposure to allergens. Common triggers include airborne pollens and molds, which are inhaled through the nose and can lead to symptoms such as sneezing, nasal congestion, and itchy/watery eyes. Understanding these triggers is essential for managing allergic rhinitis effectively, as patients can take steps to minimize their exposure to these allergens and reduce their symptoms. The correct answer is D because it specifically addresses the environmental triggers associated with allergic rhinitis.

Correct Answer: C

Rationale: The correct nursing intervention to prevent infection in patients with AIDS is to wear protective gear such as gown, mask, gloves, and goggles when entering the patient's room. Patients with AIDS have compromised immune systems, making them more susceptible to infections. Wearing protective gear helps prevent the transmission of pathogens from healthcare providers to the patient and vice versa. It helps minimize the risk of exposure to infectious agents and protects both the patient and the healthcare team. Prohibiting visitors with a cough (option B) may be important for preventing the spread of certain infections, but it is not the most effective measure for protecting patients with AIDS. Option A is not appropriate as it isolates the patient, which can have negative psychological effects. Option D is not specific enough and does not provide clear guidance on infection prevention measures.