MEDcalc on TI-89

MNH · Newbie (Posts: 8)

Looking at mdcalc.com, I see the inputs for FENa (serum sodium) can be in mEq/L or mmol/L. Do you require both?

emartin13 · Newbie (Posts: 16)

Looking at mdcalc.com, I see the inputs for FENa (serum sodium) can be in mEq/L or mmol/L. Do you require both?

emartin13 · Newbie (Posts: 16)

Thanks for doing this! I got it on my TI 89 calculator and clicked the variable button, and it is labeled as MD89, I put in a number like 2 and nothing comes up, it says invalid in dialog. I then went to the graphing screen and tried pressing variable and clicked on MD89 and nothing was "graphed". So I probably just don't know what I'm doing.

emartin13 · Newbie (Posts: 16)

I got the TI86+, I was hoping you could program some equations!

Bicarbonate deficit: HCO-3 deficit (meq) [congruent] 0.7×lean body weight (kg)× (10-plasma [HCO-3])

FENa: (FENa), % = 100 × (SCr × UNa ) / (SNa × UCr)
FEUrea: (FEUrea in percent) = (sCr * uUrea) / (sUrea x uCr) * 100
Prerenal Intrinsic renal Postrenal
FENa
<1% >1% >4%
FEUrea
≤ 35% >50% N/A

Here are three equations to get started with up top(and how to interpret the bottom 2), although I don't think we have to re-invent the wheel here as they developed an early version of MDCALC on the Palm OS before they became obsolete. I have linked the websites for download below. I think this could be in a format that could be switched over possibly to the calculator, or at least give you a framework to work from.

http://www.med-ia.ch/medcalc/palm_download.html
http://www.fppda.com/free5.htm

Sam · Power User (Posts: 441)

I just noticed this topic! I actually did something very similar to what you're looking for, for a Physics student that wanted his more often-used equations automated on the TI-84. I can do the same for you in a few days' time, on either the 84+ or the 89, both of which I own at least one of. I'm relatively fluent in both 83 and 68K BASIC, so neither calculator is particularly easier for me to code than another. However, if any of the functions you'd like implemented require a CAS or require more screen real estate, it would make more sense to write on the 89. If you're interested, please email me at moshimaster18@gmail.com or PM me on Cemetech with what specific equations you'd like implemented, or other features you'd like.

And don't worry, I do this for free! Cool

emartin13 · Newbie (Posts: 16)

I just noticed this topic! I actually did something very similar to what you're looking for, for a Physics student that wanted his more often-used equations automated on the TI-84. I can do the same for you in a few days' time, on either the 84+ or the 89, both of which I own at least one of. I'm relatively fluent in both 83 and 68K BASIC, so neither calculator is particularly easier for me to code than another. However, if any of the functions you'd like implemented require a CAS or require more screen real estate, it would make more sense to write on the 89. If you're interested, please email me at moshimaster18@gmail.com or PM me on Cemetech with what specific equations you'd like implemented, or other features you'd like.

And don't worry, I do this for free! Cool

emartin13 · Newbie (Posts: 16)

For my TI 89: hardware version 2.00 advanced mathematics software version 2.03, 12/8/1999

For My TI 84 plus SE: it is 2.53MP