The nurse is caring for a client with stage 4 chronic kidney disease. Which interpretation should the nurse make about the client's glomerular filtration rate (GFR)?

A. Severely decreased GFR:

In stage 4 chronic kidney disease (CKD), the glomerular filtration rate (GFR) is indeed severely decreased. Stage 4 CKD is characterized by a GFR between 15 and 29 mL/min/1.73 m² according to the Kidney Disease Outcomes Quality Initiative (KDOQI) guidelines. At this stage, there is significant kidney damage, resulting in a substantial reduction in kidney function and GFR. Clients with stage 4 CKD require close monitoring and management to prevent further progression of kidney disease and associated complications.

B. Mildly decreased GFR:

This choice is incorrect. Stage 4 CKD is not associated with a mildly decreased GFR. A mildly decreased GFR would typically be indicative of earlier stages of CKD. In stage 4 CKD, the reduction in GFR is severe, falling below 30 mL/min/1.73 m².

C. Kidney damage with increased GFR:

This interpretation is inaccurate. In stage 4 CKD, kidney damage leads to a progressive decline in GFR, rather than an increase. An increased GFR is not typical of advanced CKD stages; instead, it may occur in conditions such as hyperfiltration in early stages of diabetic nephropathy.

D. Moderately decreased GFR:

This option is also incorrect. Stage 4 CKD is not associated with a moderately decreased GFR. A moderately decreased GFR would typically be indicative of stage 3 CKD, where the GFR ranges from 30 to 59 mL/min/1.73 m². In stage 4 CKD, the reduction in GFR is more severe, falling below 30 mL/min/1.73 m².

A) Blockage of retinal capillaries causing ischemic damage of the central macular area:

Correct. Blurry central vision that worsens over time can be indicative of macular ischemia, often caused by blockage of retinal capillaries leading to ischemic damage of the central macular area. This condition can occur in diseases such as diabetic retinopathy or retinal vein occlusion.

B) Opaque spoke-like lines developing in the periphery of the lens to the center:

This description is more characteristic of cataracts, which cause visual disturbances such as glare or halos around lights rather than blurry central vision.

C) Tears in the retina that detach from the lining of the posterior eyeball:

Retinal tears and subsequent detachment can cause visual disturbances, but they typically present as sudden onset of floaters, flashes of light, and a curtain-like shadow over the visual field rather than blurry central vision.

D) An increase in intraocular pressure with loss of peripheral vision:

This description is indicative of glaucoma, which can lead to loss of peripheral vision (visual field defects) rather than blurry central vision. Glaucoma-related visual field loss usually begins peripherally and progresses inward, affecting central vision in later stages.