During one circuit of blood from lungs to the tissue and back through the circulatory system the percentage of haemoglobin giving the oxygen is

Correct Answer: B

Rationale: The correct answer is B (25%). In the lungs, oxygen binds to hemoglobin to form oxyhemoglobin. This increases the oxygen saturation of hemoglobin to around 97-98%. As blood travels to the tissues, oxygen is released from hemoglobin to be used by the cells. By the time blood returns to the lungs, only about 25% of the hemoglobin is still carrying oxygen. This is known as the oxygen saturation curve. Choice A (50%) is incorrect because the percentage of hemoglobin carrying oxygen drops significantly as blood travels to the tissues. Choice C (75%) is incorrect because by the time blood returns to the lungs, more than 25% of the hemoglobin has already released its oxygen. Choice D (100%) is incorrect because not all hemoglobin molecules carry oxygen at the same time; it depends on the oxygen tension in the environment.

Correct Answer: C

Rationale: Rationale: The correct answer is C because the ability to swallow own secretions without drooling indicates that the client's airway is patent and functional post modUPPP, a priority goal for this procedure. This assessment finding ensures that the client can maintain a clear airway and prevent complications such as aspiration. Incorrect choices: A: Although pain control is important, it is not a priority assessment for this specific procedure. B: Absence of foul odor or red mucus membranes is not directly related to the airway patency or swallowing ability. D: While normal vital signs are reassuring, they do not directly indicate the success of the surgery in improving airway function.

Correct Answer: A

Rationale: The correct answer is A. For thoracentesis, the client typically sits at the edge of the bed, leaning forward with arms supported on a table or over their knees to spread out the intercostal spaces and stabilize the chest wall. B is incorrect because lying on the affected side would compress the area being accessed. C is wrong as lying flat reduces access to the pleural space. D is incorrect because raising the head is not standard positioning for this procedure.

Correct Answer: D

Rationale: The correct answer is D. Immediate recognition of respiratory distress is vital in clients with influenza, especially those at risk of complications. A (airborne precautions) is unnecessary unless the client is immunocompromised. B (complete bed rest) is outdated practice. C (oxygen administration) is only needed if hypoxia is present.

Correct Answer: B

Rationale: In this scenario, the correct answer is B) Take vital signs and pulse oximetry reading every 4 hours. This task is appropriate for delegation to an experienced nursing assistant because it involves routine monitoring that does not require advanced clinical judgment. Vital signs and pulse oximetry readings are essential in assessing a client's respiratory status and can provide valuable data for the healthcare team to make informed decisions. Option A, assessing the client's respiratory status every 4 hours, involves a higher level of assessment that requires nursing knowledge and clinical judgment, making it unsuitable for delegation to a nursing assistant. Option C, checking ventilator settings, is a critical task that involves ensuring the machine is correctly set up to support the client's breathing and should only be performed by a qualified healthcare professional. Option D, observing the client's need for suctioning every 2 hours, also requires a certain level of clinical judgment to determine when suctioning is necessary. This task involves assessing the client's respiratory secretions and deciding on the appropriate intervention, which should be done by a licensed nurse. Educationally, understanding the principles of delegation is crucial for healthcare professionals to provide safe and efficient care. Delegation is about entrusting the right tasks to the right person based on their competency levels. By mastering delegation principles, healthcare providers can optimize workflow, improve patient outcomes, and promote effective teamwork within the healthcare setting.