Renal Function Test (RFT)

Subject: Medical and Surgical Nursing I (Theory)

Overview

Renal function tests are used to examine the patient's kidney function and to gauge the severity of kidney disorders. The efficacy of the kidney in performing its excretory function is also revealed by these assays. Up until the GFR is lowered to less than 50% of normal, the results of a renal function test may be within normal bounds. Tests covered by RFT include specific gravity urine osmolatity, 24-hour urine testing, creatinine clearance, serum testing, testing for creatinine, testing for BUN to creatinine ratio, and others.

Renal function tests are used to examine the patient's kidney function and to gauge the severity of kidney disorders. The efficacy of the kidney in performing its excretory function is also revealed by these assays. Up until the GFR is lowered to less than 50% of normal, the results of a renal function test may be within normal bounds. Renal concentration, creatine clearance, serum creatinine, and blood urea nitrogen levels are common tests of renal function. Renal function can also be properly determined by doing a number of tests and combining the results of each test.

Tests

Tests

Purposes

Renal concentration tests

Specific gravity urine osmolatity

 Analyzes kidney's capacity to concentrate solutes in urine. Early on with kidney illness, mental acuity is lost. Therefore, these test results may reveal early renal function defects.

24 hour urine test

Creatinine

clearance

 Detects and assesses renal disease progression. An approximate glomerular filtration rate offers an approximation of the glomerular filtration rate, a sensitive indication of renal disease used to track the evolution of renal illness. The test evaluates the volume of blood cleared of endogenous creatinine in 1 minutes.

Serum tests

Creatinine test

 Measures how well the kidneys are functioning. A byproduct of muscle energy metabolism is creatinine. A body's level of creatinine, which is controlled and eliminated by the kidneys, generally remains constant during normal function.

Urea nitrogen

 Acts as a measure of renal function. A nitrogenous byproduct of protein metabolism is urea. Consuming protein, breaking down tissues, and changes in fluid content all have an impact on test results.

BUN to creatinine ratio

 Determines hydration level. A normal ratio with a high BUN and creatinine is seen with an intrinsic renal disease, whereas an evaluated ratio is seen in hypovolemia.

 References

  • books.google.com/books?isbn=0781785898
  • Mandal, G. (August 2013). A Textbook of Adult Health Nursing (2nd ed.). Dilllibazar kathmandu: Makalu publication house. Retrieved August 2013
  • quizlet.com/58515995/chapter-53-flash-cards/
  • quizlet.com/138193907/nurse-3-module-one-flash-cards/
Things to remember
  • Renal function tests are uesd to evaluate the severity of kidney diseases.
  • to assess the status of the patient kidney function.
  • common tests of renal function include renal concentration test creatine clearance and serum creatinine and blood urea nitrogen levels.
  •  
Questions and Answers

Renal function tests are used to examine the patient's kidney function and to gauge the severity of kidney disorders. The efficacy of the kidney in performing its excretory function is also revealed by these assays. Up until the GFR is lowered to less than 50% of normal, the results of a renal function test may be within normal bounds. Renal concentration, creatine clearance, serum creatinine, and blood urea nitrogen levels are common tests of renal function. Renal function can also be properly determined by doing a number of tests and combining the results of each test.

Renal function tests are used to examine the patient's kidney function and to gauge the severity of kidney disorders. The efficacy of the kidney in performing its excretory function is also revealed by these assays. Up until the GFR is lowered to less than 50% of normal, the results of a renal function test may be within normal bounds. Renal concentration, creatine clearance, serum creatinine, and blood urea nitrogen levels are common tests of renal function. Renal function can also be properly determined by doing a number of tests and combining the results of each test.

Tests

Tests

Purposes

Renal concertration tests

Specific gravity urine osmolatity

 Analyzes kidney's capacity to concentrate solutes in urine. Early on with kidney illness, mental acuity is lost. Therefore, these test results may reveal early renal function abnormalities.

24 hour urine test

Creatinine

clearance

 Detects and assesses renal disease progression. An approximate glomerular filtration rate offers an approximation of the glomerular filtration rate, a sensitive indication of renal disease used to track the evolution of renal illness. The test evaluates the volume of blood cleared of endogenous creatinine in 1 minutes.

Serum tests

Cretinine test

 Determines the kidneys' level of performance. Creatinine is a byproduct of the energy metabolism in muscles. When the kidneys are functioning normally, the body's levels of creatinine, which are managed and removed by them, are typically steady.

Urea nitrogen

 Acts as a measure of renal function. Nitrogenous end products of protein metabolism include urea. Consuming protein, breaking down tissues, and changes in fluid content all have an impact on test results.

BUN to creatinine ratio

 Determines hydration state. Hypovolemia is indicated by an evaluated ratio, while intrinsic renal disease is indicated by a normal ratio and increased BUN and creatinine.

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