A nurse caring for a client who has hypertension and asks the nurse about a prescription for propranolol. The nurse should inform the client that this medication is contraindicated in clients who have a history of which of the following conditions?

A) Contact: While contact precautions are important for preventing the transmission of infections, they primarily apply to clients with known or suspected infections that can spread through direct or indirect contact with the client or their environment. Protective isolation goes beyond contact precautions and involves comprehensive measures to protect immunocompromised clients from all potential sources of infection.

B) Airborne: Airborne precautions are necessary for clients with infections that spread through the airborne route, such as tuberculosis or measles. While respiratory infections can pose a significant risk to immunocompromised clients, the focus of care for clients after hematopoietic stem-cell transplant is on preventing all types of infections, not just airborne ones.

C) Droplet: Droplet precautions are used for infections transmitted through respiratory droplets expelled when a person coughs, sneezes, or talks, such as influenza or pertussis. While respiratory infections are a concern for immunocompromised clients, the broader approach of protective isolation is more appropriate for clients after hematopoietic stem-cell transplant, as it encompasses all potential routes of infection transmission, not just droplet spread.

D) Protective: Clients who have undergone allogeneic hematopoietic stem-cell transplant are profoundly immunocompromised due to the destruction of their immune system and are highly susceptible to infections. Protective isolation, also known as reverse isolation, is necessary to minimize the risk of infection in these clients. This includes implementing strict infection control measures such as wearing gowns, gloves, masks, and sometimes goggles to prevent exposure to pathogens. Additionally, maintaining a clean environment and limiting visitors and healthcare personnel who may carry infectious agents are essential components of protective isolation.

A) Flushed skin: Flushed skin is not typically associated with hyponatremia. Instead, hyponatremia may present with symptoms such as pallor or cool, clammy skin due to alterations in perfusion and fluid balance.

B) Fever: Fever is not a common manifestation of hyponatremia. Elevated body temperature is typically associated with conditions such as infection or inflammation rather than electrolyte imbalances like hyponatremia.

C) Nausea and vomiting: Hyponatremia, defined as a serum sodium level below 135 mEq/L, can lead to neurological symptoms, including nausea and vomiting. These symptoms occur due to alterations in osmotic pressure and cellular swelling resulting from the relative excess of water compared to sodium in the extracellular fluid. Other neurological symptoms of hyponatremia can include headache, confusion, lethargy, and seizures.

D) Extreme thirst: Extreme thirst, or polydipsia, is more commonly associated with hypernatremia, which is characterized by a serum sodium level above 145 mEq/L. Hypernatremia results from dehydration or a deficit of body water relative to sodium, leading to increased thirst as the body attempts to restore fluid balance.