Creatinine Normal Range

73m2 and no other markers of kidney disease should be considered as having normal renal function and not labelled as having CKD. perinatology. Fisher on creatinine random urine normal range: At your age, kidney function is usually starting to drop of. Also creatinine blood level was in the normal range. As with creatinine, creatinine clearance is slightly lower in children and the elderly. 1 mg/dl are within normal range. com we explain what are normal creatinine values. CRF cats cannot adequately concentrate urine so a low specific gravity is indicative of renal failure. See more of Shelter Pets Are Not Broken on Facebook. 1 mg/dL in women and 0. A normal outcome is 0. Obstructive uropathy. Creatinine is a waste product from the normal breakdown of muscle tissue. history and creatinine level. Additional Info Albumin:Creatinine (ACR) measurement is the recommended first. The normal range of serum creatinine is 0. Women typically have a lower creatinine level than men. Normal creatinine results range from 0. If your levels are within the normal range, your kidneys function well and are able to remove toxins efficiently! This also means you have a lower risk of all-cause mortality. It is the first time I had a low reading. I just got labs back and while reviewing, saw that my bun creatinine ratio was high at 30. Levey, AS, et al. Also creatinine blood level was in the normal range. Every lab has different normal values for serum creatinine because their autoanalyzers are different. I had just put in 5 hours working lifting about 200. The normal range for creatinine in adult human serum is 0. Creatinine is produced during muscle activity, and levels do not change much day-to-day. Bring the refrigerated container to the lab. Your weight also needs to be controlled. 3 milligrams per deciliter in men, states MedlinePlus. Both creatinine and creatine are filtered by the glomerulus, but while creatine is reabsorbed by the tubules, creatinine is excreted in the urine. Always remember, while evaluating a kidney disorder, the most important value we take into consideration is serum creatinine. 50 - 99 mg/mmol Creatinine = Significant proteinuria. 3 with a range of 6-22. Creatine is released as a waste product from myocytes and converted to creatinine in the liver. 5-2x normal or control value. Below is a selection of reference ranges for various haematological and biochemical investigations. New adult reference ranges for serum creatinine Current New. -Normal childbirth causes a 6-fold elevation in maternal serum. Creatinine is the most reliable parameter to assess the functioning of kidneys. 5th percentiles of the distribution). 21 milligrams per deciliter (74. BUN to Creatinine Ratio Definition. When low creatinine levels are found alone, it might be a sign that a person does not have enough muscle tissue. View details of test: When to take, What is the normal range & Get reports Online. Hematology Ranges: PCV: 35 - 50 %: WBC: 4 - 10 x10 3 / µL: Heterophils: 30 - 70 %. Diabetes patients must control their blood sugar within the normal range to ensure normal kidney function. Swelling of the blood vessels of the kidneys. However, eating large amounts of meat may cause short-lived increases in blood creatinine levels. I had a creatinine test, and the result was 1. Retired racing greyhounds are becoming more common pets and more common patients in veterinary hospitals. However, age and sex have significant impact to amount of creatinine in urine and children and adults are definitively going to have different results. If the creatinine levels are more than 2. A urine creatinine test measures the amount of. 1 milligrams per deciliter in women and 0. NTx Units = nM BCE/mM creatinine A decrease of 30-40% from the NTx baseline after three months of therapy is a typical response to anti-resorptive therapy. The creatinine test is used to measure the amount of creatinine in the blood. Because creatinine is a nonprotein end-product of creatine phosphate, which is used in skeletal muscle contraction, the daily production of creatine, and the following product, creatinine, depends on muscle mass, which fluctuates very little. Normal BUN and creatinine values suggest the kidneys are likely healthy and working well. A urinary creatinine clearance is more accurate if the urine collection is complete. Normal values for fasting triglycerides are also age- and sex-dependent. Reference ranges for plasma cystatin C and creatinine measurements in premature infants, neonates, and older children H Finney, D J Newman, H Thakkar, JMEFell, C P Price Abstract Aim—To establish a reference range in the paediatric population for the new glomerular filtration rate (GFR) marker, cystatin C, and to compare it with that of. The conventional methods have a positive bias (falsely elevated by up to 20%) because they detected non-creatinine chromagens. How the Test is Performed. In Evaluating Patients with Diabetes for Kidney Disease. Normal = < 30mg/g. Hematology Ranges: PCV: 35 - 50 %: WBC: 4 - 10 x10 3 / µL: Heterophils: 30 - 70 %. Talk to your doctor about the meaning of your specific test results. Since creatinine is a product of muscle activity and the muscle mass of an individual tends to remain constant, creatinine production varies very little from day to day. for updated normal ranges. Normal levels vary according to your body size and muscle mass. Meaning of GFR Levels from 60 to 89. The numbers in the table show the range of the normal levels of various substances in the blood of a healthy person. Some labs use different measurements or test different samples. Creatinine is removed from the body entirely by the kidneys. A normal level is important to avoid kidney related diseases. See Creatinine clearance. Normal GFR range means normal kidney function while low GFR level means that your kidney function is low. The Normal Range of Creatinine and the Ways to Lower the High Creatinine Level 2014-10-16 17:14. Use our prescription price comparison tool to find the best prescription drug prices in your area, then use our prescription discount card to save even more!. In general however, normal creatinine levels range from 0. According to the U. Creatinine of 1. If creatinine measures greater than 1. To know some basic knowledge about creatinine levels is very important, which can help kidney disease patients choose the proper treatment. It is best to be properly hydrated and consume a normal amount of protein before taking the BUN/Creatinine Ratio Test. Creatinine [Creat] This is the best routine blood test for measuring how well kidneys are working. Normal urinary creatinine levels also decline with age. I just received my lab results - my creatinine random urine value was 209. Calculated or measured GFR or creatinine clearance has a normal range of 90-120 ml/min. Home > Available Tests > Creatinine, Timed Urine; Creatinine, Urine, 24 Reference Range: Normal: 800-2800 mg/24hrs Reference ranges provided on this web site. 1 mg/dl are within normal range. Albumin levels in Urine - Normal, High. With specimen validity testing, we can help ensure the integrity of the test by measuring pH, creatinine and specific gravity (when indicated) and testing for adulterants that may be added to the urine specimen. However, due to worldwide. When there is about 500 to 2. Therefore, in order to avoid future cardiovascular health problems, the "ideal" or beneficial (healthy) range of trigycerides should be much tighter than the often quoted "normal" triglyceride range referred to by your doctor, that is below 150 mg/dL, or 1. 3 mg/dL for men and 0. 100 - 300 mg/mmol Creatinine = High proteinuria. The normal serum creatinine range is 0. Can my healthcare provider know if my kidneys are working properly by looking at how much creatinine is in my blood?. This study aimed to investigate the association between normal ranges of UACR and carotid intima-media thickness (CIMT) in adult population. You may need to collect your urine for 24 hours in a jug. For the adult male, the normal range is 0. Alternative Names. Urea Creatinine Ratio Ranges. Early detection of renal impairment Long term monitoring of renal patients Creatinine clearance is altered by body muscle mass ,drugs,age,sex. 5 g/24 h or more) and less than 70 mg/mmol (approximately equivalent to PCR less than 100 mg/mmol, or urinary protein. Calculated or measured GFR or creatinine clearance has a normal range of 90-120 ml/min. However, nitrite found in urine may indicate urinary tract infections or bacterial infections. The BUN and creatinine levels are frequently part of a blood test known as a chemistry panel, so they are often evaluated during routine wellness checkups or pre-surgery screening in healthy pets. Some labs use different measurements or test different samples. Creatinine is one lab test used to indicate how well kidneys are working. In patients with normal renal function, such a plasma creatinine increment is usually within the normal range and has no clinical consequences. It is best to be properly hydrated and consume a normal amount of protein before taking the BUN/Creatinine Ratio Test. The MDRD Study equation has been rigorously developed and validated, is more accurate than measured creatinine clearance from 24-hour urine collections, because although creatinine clearance approximates GFR it overestimates it due to the fact that creatinine is secreted in the proximal tubule. Creatinine test measures the amount of creatinine in the blood. Creatinine is a waste product that comes from the normal wear and tear on muscles of the body. The normal range of GFR adjusted for body surface area is 100 to 130 mL/min/1. Abnormal results (lower than normal creatinine clearance) may indicate: Acute tubular necrosis; Bladder outlet. Population Mean Estimated GFR. The vet will perform the tests needed to get the levels of creatinine and determine if the levels are within a normal range. 8 mmol/l) or a bit more in normal humans after a full meal. 2 mg/dl is within the normal range. This article will familiarize practitioners with some idiosyncrasies in greyhounds that can affect their medical care. 0 mg/dl for women and 0. The normal value of creatinine is linked to muscle mass. Every lab has different normal values for serum creatinine because their autoanalyzers are different. CPT coding is the sole responsibility of the billing party. When kidneys slow down, creatinine levels increase. The range for "normal" varies from lab to lab. Accordingly, it is not sensitive at detecting early kidney disease. Everyone has creatinine in their bloodstream. For Black patients, it is important to multiple the eGFR by the correction factor if this has not already been done. Antibiotics such as Amphotercin B, Gentamycin and Vancomycin can also cause damage to the kidneys and raise creatinine levels. Creatinine is a chemical waste product of creatine, an amino acid made by the liver and stored in the liver. The Normal Range of Creatinine and the Ways to Lower the High Creatinine Level 2014-10-16 17:14. A high creatinine level is usually found out through a serum creatinine test.     Creatinine is not protein-bound and is freely filtered by glomeruli. But microalbumin was normal. Damage to the blood vessels of the kidneys. Increased creatinine blood levels indicate a decrease in kidney function. "Rodents" include mice, rats, hamsters, and gerbils. A blood (serum) creatinine is also measured during this time and used to calculated the volume of urine needed to "clear" the measured amount of creatinine from the blood and into the urine. For the majority of patients, the creatinine result by the new method will be lower. The normal level of urine creatinine in case of a random test may range between 40 to 300 mg/dL in males and 37 to 250 mg/dL in females. Elevated levels are sometimes seen in kidney disease due to the kidneys job of excreting creatinine, muscle degeneration, and some drugs involved in impairment of kidney function. 2 indicates a normal 24-hour urinary protein excretion. Please direct any questions regarding coding to the payer being. Levey, AS, et al. urea is primarily formed in the liver (it is also formed in the brain) from ammonium ion which is formed by deamination of amino acids. For men, 0. Urine creatinine (24-hour sample) values can range from 500 to 2000 mg/day. Equations for estimating unstable renal function. It is sometimes low in subjects with relatively small muscle mass, cachectic patients, amputees, and in older persons. What Your GFR Result Means Completely healthy kidney function is measured at a glomerular filtration rate (GFR) of around 100, which means that the kidneys are working at 100 percent. In both cases, the value of the patient is given to the left of the graph and is repeated on the graph inside a diamond. Everyone has creatinine in their bloodstream. A constant blood calcium level is necessary for good bone strength, a strong heartbeat, and normal function of the nerves and muscles. Creatinine. Blood group O 75% mean of normal 0. BUN to Creatinine Ratio Definition. Obviously, not every cat with such values, which are within normal range for most laboratories, has CKD!. The numbers in the table show the range of the normal levels of various substances in the blood of a healthy person. 001 indicating towards FHH the last calculation was more towards Primary Hyperparathyroidism, my phosphorus is on the high end of normal, most pth warriors are on the low end. Therefore, urine creatinine can be used as an indicator of urine water content or as a marker identifying a specimen as urine. Serum creatinine is measured in mg/dL. The normal ratio range for the BUN to creatinine is commonly between 10:1 and 20:1. Creatinine, also a waste product, is the second key indicator of overall kidney health. These are lab values from ATI book Learn with flashcards, games, and more — for free. The BUN and creatinine levels are frequently part of a blood test known as a chemistry panel, so they are often evaluated during routine wellness checkups or pre-surgery screening in healthy pets. In patients with normal renal function, such a plasma creatinine increment is usually within the normal range and has no clinical consequences. Normal creatinine levels in blood fall within the range: 0. The normal serum creatinine (sCr) varies with the subject's body muscle mass and with the technique used to measure it. When kidney function is abnormal, blood creatinine increase in the blood stream and decrease in the urine, as this is how it is removed. In the child patient urea and creatinine was within normal limits. Total Bilirubin. , sleep, arginine, insulin,. Bilirubin levels higher or lower than the normal values may not require immediate treatment unless it is persistent and reaches levels which are dangerously high. Hello - Most common causes of creatinine elevation are kidney disease, diets high in meats and certain medications, especially some antibiotics. Normal Ranges of Hematology Labs. CRF cats cannot adequately concentrate urine so a low specific gravity is indicative of renal failure. GP is not remotely concerned, but I have referred myself to BUPA and my appointment is in 2 weeks. Urine creatinine (24-hour sample) values can range from 500 to 2000 mg/day (4420 to 17680 mmol/day). If your numbers are not in the normal range, ask how to improve them. It is checked to see how well your kidneys are working. Can my healthcare provider know if my kidneys are working properly by looking at how much creatinine is in my blood?. The normal range of serum creatinine for children less than 5 years of age is 26 to 45 µmol/L, and this normal range gradually increases from age 5 to adulthood. The normal range for specific gravity is between 1. Normal BUN and creatinine values suggest the kidneys are likely healthy and working well. The normal range for BUN/Creatinine ratio is anywhere between 5 - 20 mg/dL. If kidney function is not normal, the creatinine level in your blood will increase. If you have an elevated creatinine that is due to a temporary condition, such as a kidney infection, then it should return to normal as the infection resolves. Medical literature commonly states that CK-MB levels become elevated in 4 to 6 hours, peak at 10 to 24 hours, and return to normal within 3 to 4 days after an acute myocardial infarction. For clarity, the calcium:creatinine ratio in this patient is not needed and does not need the blood values and is at least 10 times Serum Cr (umol/L) Serum Ca (mmol/L). 1 mg/dL under the age group of 18 to 60 years old. It is normally removed from your blood by your kidneys, but when kidney function slows down, the creatinine level rises. CRCL Calculator warns for creatinine if the result in not in normal ranges. Creatinine. 1 to 17 mmol/L. The measurement of creatinine can aid in establishing if any of these products were used. 1 mg/dL in women Creation level may increase in athletes or people taking a high protein diet. Normal Adult Range: 7 - 18 mg/dl. Since creatinine is the by-product of muscle metabolism inside the body, the normal range for an infant will start at 0. Creatinine is a breakdown product of creatine phosphate in muscle. 2 mg/dl are considered normal, while for woman values between 0. For detection of myocardial infarction, changes in serum CK and its heart tissue (MB) isoenzyme have been largely replaced by the more cardiac-specific nonenzymatic markers, cardiac troponin I or T. Increased levels may indicate:. The UPHS – Marquette Reference Lab is a fully integrated, comprehensive provider of laboratory services to inpatients, outpatients, outreach clients and other community health care organizations across Michigan's Upper Peninsula. So far everything seems to be in normal ranges except for slightly elevated Creatinine. Currently available normal values for the neonate population have limited value, in part because they are based on small populations and obsolete creatinine assays. The range of creatinine - spot urine test lies in between 24. For clarity, the calcium:creatinine ratio in this patient is not needed and does not need the blood values and is at least 10 times Serum Cr (umol/L) Serum Ca (mmol/L). 2 mg/dL; 53 to 106 mcmol/L. Everyone has creatinine in their bloodstream. Many kidney doctors have published that your function for Creatinine could easily be in the 1. 21 milligrams per deciliter (74. Serum creatinine concentrations are used in the determination of creatinine clearance (an indicator of GFR) and estimation of the GFR utilising the 4 variable MDRD equation. Albumin levels in Urine - Normal, High. Serum Creatinine: Creatinine is a waste product in your blood that comes from muscle activity. 1 mg/dl; Depending on the level of muscle development, the normal creatinine levels in infants are 0. Serum creatinine is measured in mg/dL. 5 being the optimal adult value for this ratio. 3mg/dl in men and 0. The urinalysis is typically normal in prerenal azotemia, with the only common finding being the presence of hyaline casts. For clarity, the calcium:creatinine ratio in this patient is not needed and does not need the blood values and is at least 10 times Serum Cr (umol/L) Serum Ca (mmol/L). 6 in Elderly Adult Bad 2013-10-23 17:06. The numbers in the table show the range of the normal levels of various substances in the blood of a healthy person. For clarity, the calcium:creatinine ratio in this patient is not needed and does not need the blood values and is at least 10 times Serum Cr (umol/L) Serum Ca (mmol/L). Since the amount of creatinine in the blood increases with muscle mass, men usually have higher creatinine levels than do women. 5th percentiles of the distribution). The blood sample is taken from a vein in your arm. The muscles metabolize creatine into creatinine and then release creatinine into the bloodstream. The measurement of creatinine can aid in establishing if any of these products were used. Creatinine is essentially a metabolite of creatinine phosphate, a compound that acts as a source of energy in muscle. Creatinine is a waste product of your body's creation of energy from nutrients (energy metabolism). Creatinine Clearance Normal Range. 2 mg/dl in males and 0. The doc's suggestion was that I drink more but that's definetly not an issue. Baseline serum creatinine (bCr) was defined as the lowest value recorded, peak Cr as the highest value, ΔCr as peak Cr minus bCr, AKI as a rise in serum Cr (sCr) by ≥0. Even small increases in serum creatinine levels during hospitalization raise the risk of end stage renal disease and mortality of elderly patients over the long term, according to a new study. Body Surface Area (BSA, m 2) = square root of : height (cm) x weight (kg) 3600. Creatinine is one lab test used to indicate how well kidneys are working. It is sometimes low in subjects with relatively small muscle mass, cachectic patients, amputees, and in older persons. Is Creatinine 2. High protein and/or creatine intake and muscle mass cause increased creatinine levels. For detection of myocardial infarction, changes in serum CK and its heart tissue (MB) isoenzyme have been largely replaced by the more cardiac-specific nonenzymatic markers, cardiac troponin I or T. URINE MICROALBUMIN/ CREATININE RATIO ( RANDOM ) - Details Component Results ComponentYour Value Standard RangeRU/MICROALBUMIN0. Normal Lab Values Updated 10/17/14. In patients with normal renal function, such a plasma creatinine increment is usually within the normal range and has no clinical consequences. Urine chemistry is a group of one or more tests done to check the chemical content of a urine sample. Creatinine is the metabolic product of muscles. It is also important to know this varies depending on each person's size and muscle mass as well as gender (as males. My creatinine was over 2. Creatinine is essentially a metabolite of creatinine phosphate, a compound that acts as a source of energy in muscle. If the level of creatinine increases, it can lead to kidney diseases. LabCorp realizes that pediatric specimen collection can be challenging and is a major concern for health care providers. This will usually reduce the levels of creatinine in the bloodstream. Renal function is routinely assessed in clinical practice by the measurement of serum creatinine. Reference Range: eGFR (ages 18-70): >60 mL/min/1. Age and gender could also affect the levels of creatinine but this should be within the normal parameters. The bloodstream carries creatinine to the kidneys, which filter it out of the blood, then creatinine passes out of the body in the urine (pee). An abnormal creatinine clearance rate may mean you have a problem with your kidneys. Creatinine is a chemical waste product in the blood that passes through the kidneys to be filtered and eliminated in urine. Normal urine creatinine values generally range from 955 to 2,936 milligrams (mg) per 24 hours for males, and 601 to 1,689 mg per 24 hours for females, according to the Mayo Clinic. Values below 20 mg/dL - and particularly below 10 mg/dL - are indicative of adulteration of urine. It’s the creatinine you’ll be interested in if you want to pass a drug test. For detection of myocardial infarction, changes in serum CK and its heart tissue (MB) isoenzyme have been largely replaced by the more cardiac-specific nonenzymatic markers, cardiac troponin I or T. 14 cut off value, sensitivity was highest 99. Evidence-based information on creatinine levels from hundreds of trustworthy sources for health and social care. 1mg/dl for female and 0. 3mg/dl in men and 0. Levels may be high in people who exercise a lot or who follow a high-protein diet. Creatinine is created in proportion to muscle mass and usually stays stable. Online Clinical Calculators. The range for "normal" varies from lab to lab. Adults with test results that are 10 milligrams per deciliter and higher and babies that have a creatine level of 2 milligrams per deciliter are showing signs of kidney disease. Normal value: 85-125 ml/min (male) 80-115 ml/min (female) Clinical importance decreased creatinine clearance is an sensitive indicator of GFR. creatinine Nephrology The end product of creatine metabolism, which is excreted into the urine; creatinine can be used to diagnose and monitor renal failure; creatinine may be measured in amniotic fluid to determine gestational age–fetal maturity index; normal ranges vary according to the lab. 2 mg/dl; In adult females, the normal levels of creatinine in the blood are in the range of 0. The normal range of GFR adjusted for body surface area is 100 to 130 mL/min/1. Urea is freely filtered and then partially absorbed by the nephron. These results are known as creatinine clearance. But microalbumin was normal. It is not subject to interference from unconjugated bilirubin and interference from acetone, acetoacetate and pyruvate is only sig­. 5 mg per dl, this means that the cat has elevated creatinine levels and this can point to a kidney problem. B-type natriuretic peptide (BNP) is a hormone produced by your heart. Is Creatinine 2. An abnormal creatinine clearance rate may mean you have a problem with your kidneys. The kidneys are responsible for keeping the level of creatinine in the blood within a normal range. To know some basic knowledge about creatinine levels is very important, which can help kidney disease patients choose the proper treatment. The BUN and creatinine levels are frequently part of a blood test known as a chemistry panel, so they are often evaluated during routine wellness checkups or pre-surgery screening in healthy pets. 4 mg/dl) in CKD patients undergoing dialysis. The results between the blood urea nitrogen (BUN) and urine creatinine will determine the ratio. Greater eleva-tions usually indicate underlying renal impairment. 15 mean of normal Blood group AB 125% mean of normal 1. I just got labs back and while reviewing, saw that my bun creatinine ratio was high at 30. 95 - 160 mL/min is considered to be normal creatinine clearance range. Creatinine is a waste product from the normal breakdown of muscle tissue. However, eating large amounts of meat may cause short-lived increases in blood creatinine levels. Useful Information. A serum creatinine concentration is the most commonly used measure of severity of renal dysfunction and is the basis for staging chronic kidney disease (CKD) (Table 1). Evidence-based information on creatinine levels from hundreds of trustworthy sources for health and social care. 4: Creatinine is a by-product of muscle metabolism and is excreted by the kidneys. Along with the blood test a creatinine clearance is done to see the level of creatinine in the urine. Medications as well a healthy diet and lifestyle modifications are helping to get the normal creatinine levels. Both creatinine and creatine are filtered by the glomerulus, but while creatine is reabsorbed by the tubules, creatinine is excreted in the urine. 2 mg/dl is within the normal range. clearance) of creatinine from the body. Please note: gender influences the normal range of the creatinine level. Accordingly, it is not sensitive at detecting early kidney disease. Normal renal history and function and/or 0. 2 milligrams (mg) per deciliter (dL) in adult males and 0. It is also important to know this varies depending on each person's size and muscle mass as well as gender (as males. The normal creatinine level in a cat with healthy kidneys is between 0. The test results for urea creatinine ratio mean different things depending on if they are high or low. By doing this, serum creatinine elevates without an acutal decrease in GFR. For men, 0. Post-renal causes of elevated creatinine. Note that target ranges may vary between laboratories. Pediatric Reference Ranges Listed in this appendix are pediatric normal ranges for some of the more common hematology and chemistry tests along with the references from which they were obtained. Normal renal function is defined as estimated creatinine clearance (CrCl) of ≥90 milliliter (mL)/minute (min). They are used to screen for kidney disease in people with risk factors, such as diabetes and high blood pressure. 66 and BUN is 80 something and hemoglobin is 7. 2 indicates a normal 24-hour urinary protein excretion. Creatinine is the most specific test for kidney disease. Serum levels of ALT normally are low—167 to 667 nkat/L (10 to 40 U/L) in most laboratories; however, normal values may vary greatly among laboratories. Human body is composed of large and small groups of skeletal muscles that are in constant state of remodeling due to pressure, physical, hormonal and biochemical changes in the body. APPENDIX B • Selected Normal Pediatric Laboratory Values 1449 Growth Hormone (S)2 After infancy (fasting specimen): 0-5 ng/mL In response to natural and artificial provocation (e. 3 milligrams per deciliter (mg/dl), but the reference range can vary from lab to lab, between men and women, and by age. It is filtered out of the blood by the kidneys and some amounts are normally secreted into the urine. We'll explain the. Phosphorous is 4. Finney H(1), Newman DJ, Price CP. Urine creatinine levels also reflect the amount of muscle mass you have. Lab tests and profiles can also be used to determine the amount of medicine you should take for your body to get back in balance or homeostasis. Creatinine levels are something that people can commonly see on the medical report when they go and diagnose kidney disease. As there is no standard reference range for random urine creatinine levels, a 24-hour urine sample test is often relied upon, to find out creatinine levels. To estimate normal ranges of blood urea nitrogen (BUN) and serum creatinine (Cr) levels in the aged, we measured BUN and Cr levels in 332 cases of apparenthealthy elderly subjects (male, 152; female, 180) aged 70 years or more. Can my healthcare provider know if my kidneys are working properly by looking at how much creatinine is in my blood?. Because of the wide range of normal for serum creatinine in most clinical laboratories, GFR must decline to approximately half the normal level before the serum creatinine concentration rises above the upper limit of normal. We reviewed dozens of different creatine supplements to land on the best creatine brands for muscle size, for the brain, for women, and more. Results depend on your age and amount of lean body mass. Serum Creatinine Normal Range. Where available, reference ranges are also provided by Tanner stage. References: Abbassi-Ghanavati M, Greer LG, Cunningham FG. Also, normally, only 10% of creatinine is secreted in the tubule. Normal Urea - 2. Consider ACEI or ARB in hypertension. Creatinine is the most specific test for kidney disease.