A nurse is teaching a client who has peripheral arterial disease. Which of the following statements should the nurse include in the teaching to explain peripheral arterial disease?

A) "Vision changes occur when pressure in the eye is increased due to a decrease of aqueous humor." This statement describes a mechanism associated with glaucoma, not cataracts. In cataracts, vision changes occur due to the opacity or cloudiness of the lens, not changes in intraocular pressure.

B) "Vision changes occur when blood vessels leak fluid or blood under a portion of the retina." This statement describes a mechanism associated with retinal diseases like diabetic retinopathy, not cataracts. In cataracts, the lens becomes cloudy, affecting the passage of light through the eye.

C) "Vision changes occur when the cloudy lens alters the passage of light through the eye." This statement is correct. Cataracts cause the lens of the eye to become cloudy, which interferes with the passage of light through the eye. This results in vision changes such as blurred vision, glare, and difficulty seeing in low light conditions.

D) "Vision changes occur when retinal tissue pulls away from the blood vessels in the eye." This statement describes a mechanism associated with retinal detachment, not cataracts. In cataracts, the lens becomes opaque, but the retinal tissue remains intact.

A. Administer pain medication as needed. Rationale: Pain management is essential for clients with traumatic brain injury (TBI) to ensure their comfort and to prevent agitation or increased intracranial pressure (ICP) due to pain. Administering pain medication as needed helps alleviate discomfort and promotes rest, which supports the client's recovery.

B. Maintain ventriculostomy at the correct position. Rationale: Ventriculostomy, also known as an external ventricular drain (EVD), is a critical component of managing intracranial pressure (ICP) in clients with traumatic brain injury. Maintaining the ventriculostomy at the correct position ensures accurate monitoring and drainage of cerebrospinal fluid (CSF), which helps control ICP levels and prevents complications such as cerebral edema.

C. Maintain the neck in the midline position. Rationale: Keeping the neck in a midline position is essential for clients with traumatic brain injury to prevent further injury to the cervical spine. Proper alignment of the neck helps maintain spinal stability and reduces the risk of exacerbating any existing spinal cord injury, which may coexist with the traumatic brain injury.

D. Elevate the head of the bed to 30 degrees. Rationale: Elevating the head of the bed to 30 degrees is recommended for clients with traumatic brain injury to promote cerebral venous drainage and reduce intracranial pressure (ICP). This position helps optimize cerebral perfusion and minimizes the risk of cerebral edema, which can occur with increased ICP.

E. Maintain enteral feedings. Rationale: Nutritional support is crucial for clients with traumatic brain injury to support healing and recovery. Enteral feedings, such as tube feedings, may be necessary if the client is unable to consume adequate nutrition orally due to impaired swallowing or altered consciousness. Providing enteral feedings ensures the client receives essential nutrients to support tissue repair and prevent malnutrition-related complications during the recovery process.