Declining GFR: Is It a Sign of Kidney Issues? - Family Medicine

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Understanding the implications of a declining glomerular filtration rate (GFR) is crucial for assessing kidney health. GFR is a key indicator of kidney function, measuring how well your kidneys filter blood. A normal GFR typically ranges from 90 to 120 mL/min/1.73 m², and values below 90 can indicate potential kidney issues.

In your case, you mentioned that your GFR was around 120 in previous years, but it has declined to 99 in January of last year and further to 94 in August. This downward trend can indeed be concerning, especially since you are only 32 years old. While fluctuations in GFR can occur due to various factors, a consistent decline warrants further investigation.

Several factors can contribute to changes in GFR, including medications, underlying health conditions, hydration status, and dietary habits. You mentioned that you have been taking medication for endometriosis (likely a hormonal treatment) since your surgery. Some medications can affect kidney function, either directly or indirectly. For instance, certain pain relievers, diuretics, and some medications used for chronic conditions can impact kidney health. It is essential to discuss with your healthcare provider whether the medication you are taking could be influencing your GFR.

Additionally, hydration plays a significant role in kidney function. Dehydration can lead to a temporary decrease in GFR, while adequate hydration can help maintain it. If you have experienced changes in your fluid intake or dietary habits, these could also be contributing factors.

Regarding your concern about the GFR dropping below 90, it is important to note that while a GFR below 90 is often flagged as a potential issue, it does not automatically indicate kidney disease. The context of the decline, including any symptoms you may be experiencing, your overall health, and any other laboratory findings, should be considered.
If you are worried about the continued decline in your GFR, it would be prudent to consult a nephrologist (kidney specialist). They can conduct a thorough evaluation, which may include additional blood tests, urine tests, and possibly imaging studies to assess kidney structure and function. They can also help determine if your medication needs to be adjusted or if further interventions are necessary.

In summary, while a declining GFR can indicate potential kidney issues, it is essential to consider the broader context, including medication effects, hydration status, and overall health. Regular monitoring and open communication with your healthcare provider are key to managing your kidney health effectively. If you have any additional symptoms or concerns, do not hesitate to seek medical advice promptly.