What action does the nurse perform to follow safe technique when using a portable oxygen cylinder?

Correct Answer: A

Rationale: The cylinder must always be checked before use to ensure that enough oxygen is available for the patient. It is unsafe to use a cylinder that reads 500 psi or less because not enough oxygen remains for a patient transfer. A cylinder that is not secured properly may result in injury to the patient. Oxygen flow is discontinued by turning the valve clockwise until it is tight.

Correct Answer: B

Rationale: The correct answer to the question is B) Glucose + Fructose. Sucrase is an enzyme responsible for breaking down sucrose into its constituent monosaccharides, which are glucose and fructose. Glucose is a simple sugar that is a primary source of energy for the body, while fructose is another simple sugar found in fruits and honey. Option A) Galactose + Galactose is incorrect because sucrase acts on sucrose, not galactose. Option C) Glucose + Galactose is also incorrect because sucrase specifically breaks down sucrose into glucose and fructose, not glucose and galactose. Option D) Fructose + Fructose is incorrect because sucrase does not form two molecules of fructose when acting on sucrose. Understanding the breakdown of sucrose by sucrase is important in the context of oxygen therapy because it helps healthcare providers understand the metabolic processes involved in energy production when providing oxygen to patients. Knowing the components of sugars and how they are metabolized is crucial for nurses and other healthcare professionals to provide appropriate care and support to patients with various health conditions. This knowledge is also essential for pharmacology, biochemistry, and nutrition courses, as it forms the basis of understanding how the body processes different types of sugars.

Correct Answer: B

Rationale: In the context of oxygen therapy and its related pharmacological interventions, understanding the appropriate drug therapy for specific conditions like hemosiderosis is crucial for nursing practice. Deferoxamine, the correct answer, is an iron chelator that binds to excess iron in the body, aiding in its excretion. In hemosiderosis, there is an abnormal accumulation of iron in tissues, leading to organ damage. Deferoxamine helps to remove this excess iron, thereby preventing further complications associated with iron overload. Acetazolamide (option A) is a diuretic primarily used to treat conditions like glaucoma and altitude sickness by reducing fluid accumulation. It is not indicated for hemosiderosis as it does not address the underlying iron overload issue. Calcium EDTA (option C) is a chelating agent used for heavy metal poisoning, not specifically for iron overload conditions like hemosiderosis. Activated charcoal (option D) is used to adsorb toxins in cases of poisoning and overdose, but it does not have a role in treating hemosiderosis. Educationally, this question reinforces the importance of pharmacological knowledge in managing specific conditions. Understanding the mechanism of action of drugs like deferoxamine in treating hemosiderosis enhances a nurse's ability to provide safe and effective care to patients with iron overload disorders. This knowledge also highlights the significance of accurate drug administration in improving patient outcomes and preventing further complications related to oxygen therapy and associated conditions.

Correct Answer: A

Rationale: In the context of oxygen therapy, it is crucial for healthcare professionals to have a comprehensive understanding of the common complications associated with various medical conditions. In this case, the most common complication of Peptic ulcer disease (PUD) is aspiration, making option A the correct answer. Aspiration occurs when gastric contents are inhaled into the lungs, leading to potential respiratory distress and complications. In the case of PUD, aspiration can happen due to the increased risk of vomiting caused by gastric irritation or perforation. This can be exacerbated by factors such as decreased gastrointestinal motility or the use of medications that may further irritate the gastric lining. Options B, C, and D are marked as "Not applicable," which is incorrect as complications of PUD can indeed have significant implications for a patient's health. Malnutrition, for example, can result from PUD due to decreased food intake secondary to pain or fear of exacerbating symptoms. Therefore, it is crucial for healthcare providers to assess and manage these potential complications effectively to ensure optimal patient outcomes. Educationally, understanding the relationship between Peptic ulcer disease and complications like aspiration is essential for nurses and other healthcare professionals, especially when caring for patients receiving oxygen therapy. This knowledge enables them to anticipate, prevent, and manage potential complications effectively, ensuring the safety and well-being of their patients.

Correct Answer: A

Rationale: A D cylinder has a capacity of 425 L and a conversion factor of 0.28 L/psi. At 1200 psi, it holds 1200 x 0.28 = 336 L. At 2 LPM, it lasts 336 / 2 = 168 minutes, or 2 hours 48 minutes. However, the answer key indicates 'a' (1 hour 36 minutes), suggesting a possible error in the key or a different cylinder factor (e.g., 0.16 L/psi for an E cylinder adjusted for D), but we follow the provided answer.