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Yeh test kya hai aur kyun kiya jata hai
Creatinine aik fuzool maada hai jo muscles kaam karte waqt banate hain. Gurde ise khoon se nikalte hain, is liye khoon mein is ki satah se pata chalta hai ke gurde kitni achi tarah chhan rahe hain. Laboratory aap ke creatinine nateeje ko aap ki umar aur jins ke saath mila kar chhanai ki raftar ka andazah lagati hai. Is andazah ko eGFR (estimated glomerular filtration rate) kehte hain.
Aap ka urologist yeh tests kuch scans se pehle maang sakta hai jin mein dye istemal hota hai, operation se pehle, jab peshab ruka ho ya pathri ki wajah se gurde par asar ho, cancer ke ilaaj ke baad gurdon ko dekhne ke liye, aur barhe hue prostate ya mesane ke masail ki nigrani ke liye jo gurdon par asar daal sakte hain.
Nateeje andazay hote hain. Yeh pani ki miqdar, muscles ke wazan, khane aur kuch dawaon se badalte hain. Aik nateeja ek lamha hai, aur waqt ke saath tabdeeli aksar zyada batati hai.
Test se pehle
- Aam tor par is test ke liye khaas roza nahi chahiye. Agar isi sample se dusre tests bhi hon to laboratory ki hidayat par amal karein.
- Apni aam miqdar mein pani peete rahein, khaas tor par garmi mein. Jism mein pani ki kami creatinine barha sakti hai aur nateeja asal se bura dikha sakta hai.
- Team ko apni tamam dawaon ke baare mein batayein, jin mein herbal aur bina nuskhe ke kharidi hui dawaen bhi shamil hain. Apne taur par koi dawa band na karein.
- Team ko body-building ya protein supplements, ya creatine ke baare mein batayein, kyun ke yeh kuch arsay ke liye creatinine barha sakte hain.
- Test se pehle gurdon ko saaf karne wali herbal cheezon se parhez karein. Yeh nateeje ko badal sakti hain, aur kuch gurdon ko nuqsan bhi pohancha sakti hain.
Test ke dauran
Aam khoon ke test ki tarah, baazu ki nas se thora sa khoon liya jata hai. Sirf chand second lagte hain, aur sample laboratory bheja jata hai. Nateeja laboratory ke hisab se aam tor par aik ya do din mein tayar ho jata hai.
Test ke baad
- Aap fauran mamool ke kaam jari rakh sakte hain.
- Jis jagah soo'i lagi thi wahan halka sa neel pad sakta hai.
- Poochh lein ke nateeja kaun samjhayega.
Mumkin khatre
Khoon ka yeh test khud bohat mehfooz hai. Neel pad jana aam hai, aur behosh hona nadir hai. Is mein radiation nahi aur dye nahi hota.
Sab se bara khatra nateeje ko ghalat samajhna hai. Aik ghair mamooli nateeja jism mein pani ki kami, haal ki bimari ya kisi dawa ki wajah se ho sakta hai, is liye aam tor par dobara test kiya jata hai. Nateeja hamesha aisa doctor parhe jo aap ko jaanta ho.
Aap ke nateeje
Nateeje ko samajhna
Creatinine ki satah aur eGFR ko aap ki umar aur jins ke mutabiq expected nateeje se muqabla kiya jata hai. Aap ka urologist batayega ke gurde expected tareeqe se kaam kar rahe hain ya nahi, aur kya nateeja waqt ke saath badal raha hai. Expected se kam nateeja ka matlab ho sakta hai ke gurde utni achi tarah nahi chhan rahe, lekin hamesha iska matlab yeh nahi ke gurde kharab hain, aur yeh aarzi bhi ho sakta hai.
Nateeja kya bata sakta hai aur kya nahi
- Yeh dikhata hai ke test ke waqt gurde kitni achi tarah chhan rahe the.
- Yeh wajah nahi batata. Is ke liye peshab ke tests, ultrasound ya CT scan aksar zaroori hote hain.
- Yeh nahi batata ke koi khaas dawa aap ke liye mehfooz hai ya nahi. Team yeh aap ke saath mil kar tay karegi.
Nateeje apne urologist ko dikhayein, aur purane nateeje sambhal kar rakhein taake tabdeeliyan dekhi ja sakein.
Fauran madad kab lein
Gurdon ka khoon ka test emergency test nahi hai. Agar yeh mein se koi ho to fauran madad lein:
- Aik din ya us se zyada waqt se bohat kam peshab, ya bilkul nahi.
- Tangon ya chehre mein sujan ke saath saans phoolna, ya seene mein jakdan.
- Qay jo pani rukne na de, ya bohat susti ya ulajhan mehsoos karna.
- Kamar ya pait mein shadeed dard, khoon wala peshab ya bukhar ke saath (dekhein kamar ya gurde ke dard wali guide).
Agar aap ko bataya gaya hai ke gurde theek kaam nahi kar rahe, to team ka contact number sambhal kar rakhein aur agar tabiyat theek na lage to usi din rabta karein.
Aam sawalaat
Kya creatinine zyada hona matlab hai ke gurde fail ho rahe hain?
Hamesha nahi. Yeh pani ki kami, muscles ke tootne, kuch dawaon ya haal ki bimari se ho sakta hai. Aap ka urologist aik nateeje ke bajaye tabdeeli ko dekhega.
Kya herbal se gurdon ka kaam behtar ho sakta hai?
Gurdon ko saaf karne wali herbal cheezen sabit shuda nahi hain aur gurdon ko nuqsan pohancha sakti hain. Koi bhi herbal cheez lene se pehle doctor se baat karein, aur kisi herbal ki wajah se apni dawaen band na karein.
Kya zyada pani peene se masla theek ho jata hai?
Kafi pani peena gurdon ke liye achha hai, lekin bohat zyada pani gurdon ko theek nahi karta. Agar doctor ne dil ya gurdon ki wajah se pani kam karne ko kaha ho to us par amal karein.
Dye wale scan se pehle yeh test kyun zaroori hai?
Kuch scans mein aisa dye istemal hota hai jise gurde khoon se nikalte hain. Agar gurde theek kaam na kar rahe hon to dye masla kar sakta hai, is liye team pehle gurde check karti hai.
Kya yeh test pathri dikhata hai?
Nahi. Khoon ka test pathri nahi dikhata. Iske liye peshab ka test, ultrasound ya CT scan istemal hota hai.
Kya painkillers gurdon par asar karti hain?
Kuch karti hain, khaas tor par jab zyada istemal hon, jism mein pani ki kami ho, ya gurde pehle se kamzor hon. Dard ki dawaen aksar lene se pehle doctor se poochhein, aur bina mashwaray kuch naya shuru na karein.
Kya nateeje mardon aur aurton ke liye mukhtalif hote hain?
Laboratory andazay ko umar aur jins ke hisab se adjust karti hai. Phir bhi aap ka doctor nateeje ko aap ki apni sehat ke tanazur mein parhta hai.
What it is and why it is done
Creatinine is a waste product made by muscles as they work. The kidneys remove it from the blood, so the level in the blood shows how well they are filtering. The laboratory uses your creatinine result, together with your age and sex, to estimate your filtering rate. This estimate is called the eGFR (estimated glomerular filtration rate).
Your urologist may ask for these tests before a scan that uses dye, before an operation, when urine has been blocked or a kidney has been affected by a stone, to check the kidneys after cancer treatment, and to follow up enlarged prostate or bladder problems that could affect the kidneys.
The results are estimates. They change with hydration, muscle mass, diet and some medicines. One result is a snapshot, and a trend over time often tells you more.
Before the test
- No special fasting is usually needed for these tests. If the same sample is used for other tests, follow the laboratory's instructions.
- Keep drinking your usual amount of water, especially in hot weather. Being dry can raise the creatinine and make the result look worse than it is.
- Tell the team about all the medicines you take, including herbal ones and any bought without a prescription. Please do not stop any medicine on your own.
- Tell the team about body-building or protein supplements, or creatine, because these can raise the creatinine level for a while.
- Avoid herbal kidney-cleansing products before the test. They can change the result, and some can harm the kidneys.
During the test
A small amount of blood is taken from a vein in your arm, as for any blood test. It takes only a few seconds, and the sample goes to the laboratory. Results are usually ready within a day or two, depending on the laboratory.
After the test
- You can carry on as usual straight away.
- You may have a small bruise where the needle went in.
- Ask who will explain the result to you.
Possible risks
The blood test itself is very safe. A bruise is common, and fainting is rare. There is no radiation and no dye.
The main risk is misunderstanding the result. A single abnormal result can be caused by dehydration, a recent illness or a medicine, so it is usually repeated before any conclusion is drawn. A result must always be read by a doctor who knows you.
Your results
Reading the result
The creatinine level and the eGFR are compared with what is expected for your age and sex. Your urologist will tell you whether your kidneys are working as expected, and whether the result is changing over time. A lower than expected result may mean the kidneys are not filtering as well as they should. It does not always mean the kidneys are damaged, and it can be temporary.
What the result can and cannot show
- It shows how well the kidneys are filtering at the time of the test.
- It does not show the cause. Urine tests, an ultrasound scan or a CT scan are often needed for that.
- It does not show whether a particular medicine is safe for you. Your team will decide that with you.
Please take your results to your urologist, and keep your old results so that changes can be seen over time.
When to seek urgent help
A kidney blood test is not an emergency test. Please seek urgent help if you have any of these:
- Passing very little urine, or none at all, for a day or more.
- Swelling of the legs or face with breathlessness, or chest tightness.
- Vomiting that stops you keeping fluids down, or feeling very drowsy or confused.
- Severe pain in the back or tummy, with blood in the urine or fever (see the flank or kidney pain guide).
If you have been told your kidneys are not working well, keep your team's contact number and contact them the same day if you feel unwell.
Common questions
Does a high creatinine mean my kidneys are failing?
Not always. It can be caused by dehydration, muscle breakdown, some medicines or a recent illness. Your urologist will look at the trend, not just one result.
Can herbs improve my kidney function?
Herbal kidney-cleansing products are not proven and can harm the kidneys. Please talk to your doctor before taking any herbal product, and do not stop your medicines in order to take one.
Does drinking more water fix it?
Drinking enough water is good for the kidneys, but drinking very large amounts does not repair them. If your doctor has asked you to limit fluids for a heart or kidney reason, follow that advice.
Why is the test needed before a dye scan?
Some scans use a dye that the kidneys clear from the blood. If the kidneys are not working well, the dye can cause problems, so your team checks them first.
Does this test show kidney stones?
No. A blood test does not show stones. A urine test, or an ultrasound or CT scan, is used for that.
Do painkillers affect the kidneys?
Some can, especially when used often, when the body is dry, or when the kidneys are already weak. Please ask your doctor before using painkillers regularly, and do not start anything new without advice.
Are the results different for men and women?
The laboratory adjusts the estimate for age and sex. Your doctor still reads the result in the context of your own health.