Cystatin C results! : Hello everyone! Ok. So... - Kidney Disease

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Cystatin C results!

Sharam profile image
33 Replies

Hello everyone!

Ok. So, I got my cystatin c results today and it's 1 mg/l (normal range 0.4 to 1.2)

I worriedly put the numbers in the online GFR calculator and it gave me a few results depending on the equation!

CKD-EPI creatinine equation (2021): 73

CKD-EPI creatinine-cystatin equation (2021): 80

CKD-EPI cystatin C equation (2012): 85

That's kinda good! I mean not better than having no CKD actually lol but anyway, it's better than 69 based on the older (2009) equation!

I'd reallyyyy prefer to go with the last equation (based on cystatin c only) hahaha

But can I?

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Sharam profile image
Sharam
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33 Replies
Seattle1 profile image
Seattle1

Good job 👍🏻

Sharam profile image
Sharam in reply to Seattle1

Thank you very much! I didn't really do much! 😅

I just had another test (cystatin c) which, one of my doctors said, is more reliable than the creatinine test!

Now, based on creatinine my gfr is 73 (a 7-point drop since last year)

And based on cystatin c my gfr is 85

I was wondering which one to go with hahaha

Sophiebun11 profile image
Sophiebun11 in reply to Sharam

That's a tough decision!!! LOL!!! I think it was Skeptix, miss him, that posted about that. I tried it when my eGFR was 28 and it went to 29. I guess that was better than dropping to 9.

I'm having more blood in 2 weeks so I'll try it again and see.

I like yours. 85% kidney function sounds awesome that is so close to 100% you could reach out a long stick and touch it!!! LOL

YAY for you!!!! Great news, I hope that way takes over it sure sounds better.

🐇👍😂

Sharam profile image
Sharam in reply to Sophiebun11

Thanks! So, you think I can go with cystatin c based gfr?! 😅I'd really like that!

There are many gfr calculators!

I hate the 2009 version cause it says my gfr is 69! Hahaha

But the 2021 version says it's 74! (still a 7-point decrease, but anyway!)

And according to the 2012 cystatin c based gfr equation it's 85!

It's over my head, I think! What does it mean? My creatinine went up from 1.2 to 1.3 and my gfr is better now?!

I put numbers in the calculator to see what creatinine level equals gfr 85 for me and it's 1.14 (even lower than last year!) ! Does that mean there was a temporary 0.16 point increase due to a reason we don't know! What about the constant increase in creatinine level in 6 years?!

1.1 (2016)

1.17 (2019)

1.2 ( 2021 jan)

1.3 (2021 dec)

I'm really confused!

On the one hand, I'd like to think this cystatin c is much more accurate, and my GFR is 85, and on the other hand, I can't ignore the increase over the years!

My nephrologist isn't available now, so I'm going crazy!

Jayhawker profile image
Jayhawker in reply to Sharam

I hope you are planning to talk with your nephrologist about all of this.

Jayhawker

Sharam profile image
Sharam in reply to Jayhawker

I'm going to... But she's not available now. I was thinking about talking to an online nephrologist maybe! They usually answer my questions more patiently lol

RoxanneKidney profile image
RoxanneKidney in reply to Sharam

That is AWESOME...so you know what you need to do as far as eating and working out to stay there!

Sharam profile image
Sharam in reply to RoxanneKidney

Thanks! I'm still confused about the results, though hahaha

RoxanneKidney profile image
RoxanneKidney in reply to Sharam

Basically according to research if you had been testing lower with the creatinine test like below 60, and you tested higher with the C then your kidneys are running better than originally suspected. However, this doesn't mean they are ok, just better so continue to eat healthy and workout and keep your BP as low as possible..below 120/80. 110/70 would be ideal. The kidneys like really low BP. Anyway just don't let your guard down. Happy new year 🎉

Sharam profile image
Sharam in reply to RoxanneKidney

Sure. Thank you for the advice.Happy new year to you too! 😊🎉

Bassetmommer profile image
BassetmommerNKF Ambassador

I am hopeful that more doctors are moving towards this test as a better indicator of CKD. That is what the research is showing.

Sharam profile image
Sharam in reply to Bassetmommer

I really hope so!

I went to three nephrologists. Two of them didn't really believe in cystatin c tests, but the other did!

That's why I wonder which results show my actual kidney function!

Sophiebun11 profile image
Sophiebun11 in reply to Sharam

My Neph put the Cysteine C test each time he ordered labs. My PCP didn't.

Jayhawker profile image
Jayhawker in reply to Sharam

Both my regular nephrologist and my transplant nephrologist say the Cysteine C test is more accurate. It’s my understanding that the field of renal care is shifting to Cysteine C testing.

Jayhawker

orangecity41 profile image
orangecity41NKF Ambassador in reply to Jayhawker

Imagine the levels of sodium, potassium and phosphorus will be considered on the diagnosis of CKD.

Sharam profile image
Sharam in reply to orangecity41

Yes. Well, they're all normal. Seven clear ultrasound reports in 6 years. No proteinuria. Last years 24 hr sample showed 45 mg/24h (normal : lower than 150)Last weeks spot sample showed no albuminuria...

Doctors seem to wanna wait until I get to stage 3 to do something...

Maybe they're right. My nephrologist once said any drug we use at this stage can be counterproductive!

I'm not sure what medication she was taking about!

Marvin8 profile image
Marvin8

There are so many variables at play here. Look up some of my older posts about Cystatin C.I'll just say this; At THIS particular time, I think the most accurate formula takes both creatinine and cystatin C into account. The only agreement amongst the nephrologists is that Cystatin C is a good tool for the prognosis of ckd progression and heart disease. If your cystatin c egfr is lower than your creatinine egfr, that's not good. Older nephs don't trust cystatin C much. Newer nephs do. My creatinine eGFR is 49. My Cystatin C eGFR is 88. Which do you think I'D prefer? And lest not we forget that higher eGFR means less referrals and less business for nephrologists.

Sharam profile image
Sharam in reply to Marvin8

Thank you so much.I read your post on Cystatin C, and it was very informative.

What makes this a little more complicated for me is that 6 years ago when my creatinine was 1.2 mg/dl I worked out and I was more muscular. I lost 12 pounds since, and my creatinine has been going up... That's kind of worrisome for me. But yeah, I'll talk to a nephrologist about it...

You said higher gfr means fewer referrals and less business for nephrologists. You mean that's why they don't usually order cystatin c?!

Marvin8 profile image
Marvin8 in reply to Sharam

It has been my experience that older nephrologists are more hesitant to embrace Cystatin-C as an adjunctive indicator, let alone preferring it as the primary indicator. Younger nephrologists tend to be a little bit more open to the latest research. Don't forget that BOTH creatinine and Cystatin-C have contraindications for usage as the primary indicator. That's why the combined formula is now considered by "most" nephs as the most accurate.

Sharam profile image
Sharam in reply to Marvin8

You're right. Thank you.Then cystatin c - creatinine equation it is!

80 is still better than 73 any way lol

Marvin8 profile image
Marvin8 in reply to Sharam

If you're young and it's 80, that's a head's up that you need to be aware of future ckd.Eat a healthy diet, take it easy on the protein, make sure you're always properly hydrated, and you'll be fine.

Sharam profile image
Sharam in reply to Marvin8

I'm 37. Last week I was actually thinking about whether I could turn 50 without dialysis, and then how many years I'd be able to continue on dialysis considering my other health problems (ITP)! And then if I'm lucky enough to get a transplant how long would I have it without rejection. How would I swallow so many anti-rejection pills (I hate to swallow pills and it's extremely hard for me)! 😅These are the kind of thoughts that come to my mind every day!

But yeah, I need to watch what I eat. I'd been doing it for 6 months, by going vegan! But it seems like something went wrong cause my creatinine kept going up.

It's time to turn back to a nephrologist. A new nephrologist actually!

Marvin8 profile image
Marvin8 in reply to Sharam

Read about the latest pig kidney research to lift your spirits.

Jayhawker profile image
Jayhawker in reply to Marvin8

Do you have a few links you can share about this new research?

TaffyTwoshoes27 profile image
TaffyTwoshoes27 in reply to Jayhawker

nytimes.com/2021/10/19/heal...

Sharam profile image
Sharam in reply to TaffyTwoshoes27

Oh, I was reading the article happily and enthusiastically until I got to "The procedure will not be available to patients any time soon, as there are significant medical and regulatory hurdles to overcome."

It seems like the bio-artificial kidney will be available much sooner. Anyway, they're both American things, so it'll probably take a few more years for them to be available in my country! *Sighs*

FThomp profile image
FThomp in reply to Sharam

This is all good news and it’s good to know that you may never need any intensive treatment in your lifetime if you continue good habits! I think the future is or promising in medical innovation but it’s better to avoid having to need any of that preferably. I’m getting a cystatin test next too. My gfr is around 80’s-90’s but I’m only 28 and my creatinine has been around 1.10-1.15 for years. Sadly the neon I got referred to said they can’t order a cystatin test and the coordinator said she never even heard of the cystatin test!!!

Sharam profile image
Sharam in reply to FThomp

I'm pretty sure your cystatin c based gfr will be above 100! 1.1 isn't high for a body builder (well, doctors say so!) but yeah, get that Cystatin c test to make sureI found an old lab report of mine for when I was 26. I put the numbers in the gfr calculator, and it turned out my gfr was above 120 back then *sighs* lol

FThomp profile image
FThomp in reply to Sharam

Haha nice! Yeah I’m trying to get one but my neph had no idea what cystatin is lol

FThomp profile image
FThomp in reply to Sharam

The doctor who did the surgery actually said they plan to test more on living (non vegetative state) humans in the next few years, I think clinical trials could last maybe a year or two if the results are promising. Remember, they ended the sglt2 studies early bc if such good results. I think by the time you would need any replacement therapy years maybe decades down the road, there will be new viable alternatives such as the bio artificial kidney or xenotransplantation. With crispr they modify the pigs genes to not secrete alpha gal that caused rejection. Who knows maybe they can use crispr or stem cells further to cut out rejection completely and remove the need for immunosuppressants. Also, there’s the freedom-1 trials right now thst have stem cells replacing immunosuppressants if I’m not mistaken

Sharam profile image
Sharam in reply to FThomp

Oh, that's great news and gave me much more hope! Hahaha thanks! Yeah, for now all we can do is slow down the progression as long as we can and hope these future treatments will be available as soon as possible!

FThomp profile image
FThomp in reply to Sharam

Exactly! The doct himself said a year or two but idk, we will see I guess. I think the global economy just cannot handle the cost of traditional dialysis anymore soci except better more efficient alternatives to arise relative soon. KidneyX just launched in 2017 I bekeive or somewhere around there. More work is being done in crispr and anti aging tech with some of the richest people in the world investing into those fields.

FThomp profile image
FThomp in reply to Marvin8

This info is much needed. I think taking both into account is a huge factor. I’m excited for my test as well

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