A nurse is caring for a patient who is postoperative following a total knee replacement. What action should the nurse take to prevent deep vein thrombophlebitis?

 

Choice B rationale:

Stridor is a high-pitched, whistling sound that is heard during inspiration. It is a sign of upper airway obstruction, indicating a potentially life-threatening complication that requires immediate intervention.

Here's a detailed explanation of why stridor is the most concerning finding and why the other choices are not as indicative of a serious problem:

Stridor:

Mechanism: Stridor occurs when there is narrowing or obstruction of the upper airway, typically at the level of the larynx or trachea. This narrowing can be caused by various factors, including:

Laryngospasm: A sudden constriction of the vocal cords, often triggered by irritation or inflammation. Post-extubation edema: Swelling of the tissues in the airway after removal of the endotracheal tube.

Mucus plugging: Accumulation of thick secretions in the airway, which can partially block airflow.

Vocal cord dysfunction: Impairment of the vocal cords' movement, which can affect their ability to open and close properly.

Significance: Stridor is a serious sign because it indicates that airflow is significantly restricted. If left untreated, upper airway obstruction can lead to hypoxia (low oxygen levels) and respiratory failure.

Nursing intervention: If stridor is present, the nurse should immediately notify the provider and prepare for potential interventions to secure the airway, such as:

Reintubation: Reinserting the endotracheal tube to bypass the obstruction.

Nebulized racemic epinephrine: Medication to reduce swelling in the airway.

Heliox: A mixture of helium and oxygen that can improve airflow through a narrowed airway. Steroids: Medications to reduce inflammation in the airway.

Crackles (Choice A):

Description: Crackles are rattling, crackling sounds heard in the lungs, often during inspiration. They are typically associated with lower airway problems, such as pneumonia or pulmonary edema.

Significance: While crackles can indicate respiratory issues, they are not as immediately concerning as stridor in the context of post-extubation care.

Strong cough (Choice C):

Significance: A strong cough is generally a positive sign after extubation, as it indicates that the patient is able to clear secretions from their airway effectively.

Deep breathing (Choice D):

Significance: Deep breathing is also a positive sign, as it promotes lung expansion and oxygenation.

Choice A rationale:

Temperature control for either hypothermia or hyperthermia is crucial in septic shock management. Here's a detailed explanation:

Hypothermia:

Mechanism: Septic shock often causes impaired thermoregulation, leading to hypothermia. It can worsen shock by decreasing cardiac output, impairing coagulation, and promoting vasoconstriction.

Intervention: Active warming measures are essential, including: External warming devices (e.g., blankets, forced air warmers) Intravenous fluids warmed to 39-42°C

Warmed humidified oxygen

Minimizing exposure and covering the patient Hyperthermia:

Mechanism: Sepsis can trigger an excessive inflammatory response, leading to hyperthermia. It can exacerbate tissue injury, increase metabolic demands, and worsen organ dysfunction.

Intervention: Aggressive measures to lower temperature are necessary, including:

Antipyretic medications (e.g., acetaminophen, ibuprofen) External cooling methods (e.g., cooling blankets, ice packs) Sedation if shivering occurs

Choice B rationale:

Administration of cardiotonic agents such as dopamine, dobutamine, or norepinephrine is often required in septic shock to: Improve cardiac output: These agents increase myocardial contractility and heart rate, enhancing blood flow to vital organs.

Maintain blood pressure: They support vasoconstriction, counteracting the widespread vasodilation characteristic of septic shock.

Improve tissue perfusion: By optimizing cardiac output and blood pressure, they help ensure adequate oxygen and nutrient delivery to tissues.

Choice E rationale:

Blood cultures from all suspected sources before administration of antibiotics are essential for guiding appropriate antibiotic therapy.

Early identification of the causative organism: This information is crucial for selecting the most effective antibiotic regimen.

Prevention of antibiotic resistance: Judicious use of antibiotics based on culture results helps prevent the development of antibiotic-resistant bacteria.

Choice F rationale:

Vigorous intravenous fluid resuscitation with 0.9% sodium chloride is a cornerstone of septic shock management.

Replenishing intravascular volume: Septic shock often causes profound intravascular volume depletion due to capillary leak and vasodilation. Fluid resuscitation aims to restore circulating volume and maintain organ perfusion.

Improving hemodynamic stability: By increasing preload and cardiac output, fluids help stabilize blood pressure and support vital organ function.