Correct Answer: A

Rationale: In a situation where a client has no family members and the client's wife is mentally incompetent, the healthcare provider may write a DNR order if it is deemed medically certain that resuscitation would be futile. A DNR order is a medical directive that instructs healthcare providers not to perform CPR if a patient's heart stops or if the patient stops breathing. Option A is correct because a DNR order can indeed be issued by a healthcare provider under certain circumstances, as it is a medical decision. Options B, C, and D are incorrect as they do not accurately reflect the concept of DNR orders and the decision-making process involved in such situations.

Correct Answer: B

Rationale: Uric acid levels are commonly assessed in patients with gout. Gout is a type of arthritis caused by the buildup of uric acid crystals in the joints, leading to inflammation and pain. Monitoring uric acid levels helps in diagnosing and managing gout. Asthma, diverticulitis, and meningitis are not conditions where blood tests for uric acid levels are typically necessary. Asthma is a respiratory condition, diverticulitis involves inflammation of the digestive tract, and meningitis is an infection of the meninges in the brain and spinal cord.

Correct Answer: A

Rationale: When a chest tube becomes disconnected, the priority action is to immediately reattach it to the drainage system or submerge the end in a bottle of sterile water or saline solution to reestablish a water seal. This helps prevent air from entering the pleural space and causing complications. Calling the health care provider is important but not the first action in this emergency. Instructing the client to inhale and hold his breath should be avoided as it can introduce atmospheric air into the pleural space, leading to potential issues. Clamping the chest tube is generally contraindicated, especially in cases of residual air leak or pneumothorax, as it may result in a tension pneumothorax by preventing air from escaping.

Correct Answer: B

Rationale: The correct nursing diagnosis for an epileptic client would be 'Risk for Injury' as the client is prone to injuries during seizure activity, such as head trauma from falls. Epilepsy does not typically cause dysreflexia. While urinary retention may occur during or after a seizure, it is not a common nursing diagnosis related to epilepsy. 'Unbalanced Nutrition' is not a priority nursing diagnosis for an epileptic client compared to the immediate risk of injury during seizures.

Correct Answer: C

Rationale: When a client is in hepatic coma due to liver failure, the liver cannot metabolize amino acids completely, leading to elevated ammonia levels. Increased ammonia can cause brain-tissue irritation, worsening the coma. Therefore, monitoring serum ammonia levels is crucial in assessing the severity of hepatic coma. Choices A, B, and D are less relevant in the context of hepatic coma. Blood urea nitrogen primarily assesses kidney function, serum calcium levels are not directly related to hepatic coma, and serum creatinine is more indicative of kidney function rather than liver function in this scenario.