CALCULATIONS

Adjusted Calcium (mg/dL) Total Calcium + 0.8 x (4.0-Albumin)
Included In Adjusted Calcium Phosphorus Product
  Comprehensive Metabolic Panel
  Comprehensive Metabolic Panel w/Phosphorus
Note Calculation provided only when Albumin is <4.0 g/dL
   
Adjusted Calcium Phosphorus Product (mg²/dL²) (Total Calcium (mg/dL) + 0.8 x (4.0-Albumin (g/dL)) x Phosphorus
Included In Adjusted Calcium Phosphorus Product
  Comprehensive Metabolic Panel w/Phosphorus
Note Calculation provided only when Albumin is <4.0 g/dL
   
A/G Ratio Albumin/Globulin
Included In Comprehensive Metabolic Panel
  Comprehensive Metabolic Panel w/Phosphorus
   
Anion Gap (mEq/L) Sodium – (Chloride + CO2)
Included In Basic Metabolic Panel
  Comprehensive Metabolic Panel
  Comprehensive Metabolic Panel w/ Phosphorus
Electrolytes
  Renal Function Panel
   
Calcium Phosphorus Product (mg2/dL2) Total Calcium x Phosphorus
Included In Calcium Phosphorus Product
  Adjusted Calcium Phosphorus Product
  Comprehensive Metabolic Panel w/Phosphorus
   
eGFR (mL/min/1.73 m²)  175 x (Scr)-1.154 x (age)-0.203 x (0.742 if female) x (1.210 if African American)
Included In eGFR (CKD, Non Dialysis)
Note Estimated GFR (eGFR) using IDMS-Traceable Modification of Diet in Renal Disease (MDRD)
   
Globulin (g/dL) Total Protein–Albumin
Included In Comprehensive Metabolic Panel
  Comprehensive Metabolic Panel w/Phosphorus
   
Hemoglobin x 3 (g/dL) Hemoglobin x 3
Included In Complete Blood Count (CBC) & Differential
  Complete Blood Count (CBC) & Differential w/Reticulocytes
  Hemoglobin
  Hemoglobin & Hematocrit (H&H)
  Hemogram (Complete Blood Count w/o Differential)
   
Iron Status w/Iron & Transferrin Panel  
Total Iron Binding Capacity (TIBC) (µg/dL) Transferrin x 1.4
% Transferrin Saturation (Iron/(Transferrin x 1.4)) x 100
   
Lipid Panel (Coronary Risk Profile)  
Cholesterol/HDL Ratio Cholesterol/HDL
Low Density Lipoprotein (mg/dL) Cholesterol – (Very Low Density Lipoprotein + HDL)
Very Low Density Lipoprotein (mg/dL) Triglycerides/5
Note Only provided if Triglyceride is <400 mg/dL
   
Prothrombin Time (Protime)  
International Normalized Ratio (INR) (PT Ratio)ISI
  PT Ratio = (Patient PT/Mean Normal PT)ISI
  Mean Normal PT = Geometric Mean
  ISI = International Sensitivity Index
   
Recirculation Study  
% Recirculation (Systemic BUN – Arterial BUN)/(Systemic BUN – Venous BUN) x 100
HEMODIALYSIS CALCULATIONS
Kt/V Equilibrated (eqKt/V) (0.924 x lnKt/V) – ((0.395 x lnKt/V) / (Min / 60)) + 0.056
Included In Kt/V Standard, URR
  Kt/V Standard, Natural Log, URR
Note Leypoldt Formula
  For patient dialyzing 2 or 4-6 times per week
  For Kt/V Standard calculation purposes only, not reported
   
Kt/V Jindal (0.04 x ((Pre BUN – Post BUN) / Pre BUN x 100) – 1.2)
Included In Kt/V Jindal (Not K/DOQI Recommended)
Note Jindal Formula
  The HD Adequacy Work Group feels this formula should not be used to measure delivered dose of Hemodialysis. (K/DOQI Clinical Practice Guidelines for Hemodialysis Adequacy: Update 2000, Guideline 2)
   
Kt/V Natural Log (lnKt/V) (-Ln((Post BUN/Pre BUN) - (0.008 x Treatment Time in mins/60)) + ((4-(3.5 x (Post BUN/Pre BUN)) x (Pre WT-Post WT)/Post WT))
Included In Kt/V Natural Log, URR
  Kt/V Natural Log, URR, nPNA
  Kt/V Standard, Natural Log, URR
Note Daugirdas II Formula
  The K/DOQI recommendations are: Prescribed dose of hemodialysis: Kt/V of 1.3
  Delivered dose of hemodialysis: Kt/V >1.2
Kt/V Standard (stdKt/V) 168 x (1-exp(-eqKt/V)) / (Min/60)) / ((1-exp(-eqKt/V)) / eqKt/V + (168/Number of Treatment/(Min/60)) -1)
Included In Kt/V Standard, URR
  Kt/V Standard, Natural Log, URR
Note Leypoldt Formula
  For patient dialyzing 2 or 4-6 times per week
   
nPNA, Hemodialysis 1. Treatment #1: Beginning of week PNA (PCR) = Pre BUN /(36.3 + 5.48 x Kt/V Natural Log + 53.5/ Kt/V Natural Log) + 0.168
2.  Treatment #2:  Midweek PNA (PCR) = Pre BUN /(25.8 + 1.15 x Kt/V Natural Log + 56.4/ Kt/V Natural Log) + 0.168
  3.  Treatment #3: End of week PNA (PCR) = Pre BUN /(16.3 + 4.3 x Kt/V Natural Log + 56.6/ Kt/V Natural Log) + 0.168
Included In Kt/V Natural Log, URR, nPNA
Note nPNA calculation is only applicable to patients on thrice-weekly dialysis without significant residual function.  nPNA calculated from Kt/V without formal kinetic modeling according to Depner T and Daugirdas J:JASN 1996:7:780-785.
Urea Reduction Ratio (%) (1 – (Post BUN/Pre BUN)) x 100
Included In Kt/V Jindal (Not K/DOQI Recommended)
  Kt/V Natural Log, URR
  Kt/V Natural Log, URR, nPNA
  Kt/V Standard, Natural Log, URR
  Kt/V Standard, URR
Ultrafiltration Rate (UFR) (mL/kg/hr) ((pre-weight – post-weight) x 1000)/ (delivered time in mins/60)/ post-weight in kg))
Included In Kt/V Natural Log, URR
  Kt/V Natural Log, URR, nPNA
  Kt/V Standard, Natural Log, URR
  Kt/V Standard, URR
PD ADEQUACY CALCULATIONS  
Weekly Total Kt/V Weekly Residual Kt/V + Weekly Dialysate Kt/V
   
Weekly Residual Kt/V ((Urine Urea Nitrogen/BUN) x (Urine Volume (mL)/Urine Collection Time (min)) x 10.08) / VSA
Note Calculated if urine sample provided
   
Weekly Dialysate Kt/V ((Dialysate Urea Nitrogen/BUN) x (24 hour Dialysate Drain Volume (mL)/1000) x 7) / VSA
   
Weekly Total CrCl Weekly Residual GFR + Weekly Dialysate Creatinine Clearance
(L/wk/1.73 m²)  
   
Weekly Residual GFR            Arithmetic Mean of Weekly Urea Clearance and Weekly Creatinine Clearance 
(L/wk/1.73 m²) ((Urine Urea Nitrogen/BUN) x (Urine Volume (mL)/Urine Collection Time (min) x 10.08) + (Urine Creatinine/Plasma Creatinine x Urine Volume (mL)/Urine Collection Time (min) x 10.08))/2 x 1.73/BSA
   
Weekly Dialysate CrCl        (Dialysate Corrected Creatinine/Plasma Creatinine) x (24 hour Dialysate Drain Volume (mL)/1000) x 7 x 1.73/BSA
 (L/wk/1.73 m²)  
   
Weekly Residual CrCl  (Urine Creatinine/Blood Creatinine) x (Urine Volume (mL)/Urine Collection Time (min)) x (1.73/BSA) x 10.08
(L/wk/1.73 m²)  
   
Creatinine Clearance (Urine Creatinine/Blood Creatinine) x (Urine Volume (mL)/Urine Collection Time (min)) x (1.73/BSA)
(mL/min/1.73m2)  
   
Corrected Creatinine, 24 Hour (mg/dL) Creatinine at 24 Hour Dwell – (Glucose at 24 Hour Dwell x 0.00010386)
   
nPNA, Peritoneal Dialysis   (g/kg/day) (10.76 x ((0.69 x UNA) + 1.46)) / (VSA/0.58)
   
Protein Nitrogen Appearance (PNA)   (g/day) 10.76 x ((0.69x UNA) + 1.46)
   
UNA (g/day) (24 Hour Drain Volume (mL) x 24 Hour Urea Dialysate)/100000 + (Urine Volume (mL) x Urine Urea Nitrogen)/100000) x (1440/Total Urine Collection Time (min))
Note For PNA calculation purposes only, not reported
   
Body Surface Area (BSA) Adult (≥16 years) uses DuBois and DuBois formula
  BSA (m²) = 0.007184 x Wt^0.425 x Ht^0.725
  Pediatric (< 16 years) uses Haycock formula
  BSA (m²) = 0.024265 x Wt^0.5378 x Ht^0.3964
  where weight (Wt) is in kilograms and height (Ht) is in centimeters
   
Volume (V) from Surface Area (Liters) Adult (≥16 years) uses Hume and Weyers formula  
  Male: V= -14.012934 + 0.296785 x Wt + 0.194786 x Ht 
  Female: V = -35.270121 + 0.183809 x Wt + 0.344547 x Ht 
  Pediatric (<16 years) uses Friis-Hansen formula 
  V = 0.135 x Wt^0.666 x Ht^0.535
  where weight (Wt) is in kilograms and height (Ht) is in centimeters
Peritoneal Equilibration Test (PET) Fast  
Corrected Creatinine, 4 Hour (mg/dL) Creatinine at 4 Hour Dwell – (Glucose at 4 Hour Dwell x 0.00010386)
Corrected Creatinine D/P, 4 Hour Corrected Creatinine at 4 Hour Dwell/Plasma Creatinine
Peritoneal Equilibration Test (PET) Standard  
Corrected Creatinine, 0 Hour, 2 Hour, 4 Hour (mg/dL) Creatinine at 0 or 2 or 4 Hour Dwell – (Glucose at 0 or 2 or 4 Hour Dwell x 0.00010386)
Corrected Creatinine D/P, 0 Hour Corrected Creatinine at 0 Hour Dwell/Plasma Creatinine 
Corrected Creatinine D/P, 2 Hour Corrected Creatinine at 2 Hour Dwell/Plasma Creatinine
Corrected Creatinine D/P, 4 Hour Corrected Creatinine at 4 Hour Dwell/Plasma Creatinine
Glucose D/D0, 2 Hour Glucose at 2 Hour Dwell/Glucose at 0 Hour Dwell
Glucose D/D0, 4 Hour Glucose at 4 Hour Dwell/Glucose at 0 Hour Dwell
Urea D/P, 0 Hour Urea at 0 Hour Dwell/Plasma Urea 
Urea D/P, 2 Hour Urea at 2 Hour Dwell/Plasma Urea 
Urea D/P, 4 Hour Urea at 4 Hour Dwell/Plasma Urea 
Peritoneal Equilibration Test (PET) Modified  
Corrected Creatinine, 0 Hour, 1 Hour,  2 Hour, 4 Hour (mg/dL) Creatinine at 0 or 1 or 2 or 4 Hour Dwell – (Glucose at 0 or 1 or 2 or 4 Hour Dwell x 0.00010386)
Corrected Creatinine D/P, 4 Hour Corrected Creatinine at 4 Hour Dwell/Plasma Creatinine 
Sodium D/P, 0 Hour Sodium at 0 Hour Dwell / Plasma Sodium 
Sodium D/P, 1 Hour Sodium at 1 Hour Dwell / Plasma Sodium
Sodium D/P, 2 Hour Sodium at 2 Hour Dwell / Plasma Sodium
Sodium D/P, 4 Hour Sodium at 4 Hour Dwell / Plasma Sodium
Fluid, 24-Hour Dwell  
Corrected Creatinine, 24 Hour (mg/dL) Creatinine at 24 Hour Dwell – (Glucose at 24 Hour Dwell x 0.00010386)
Fluid, Overnight Dwell  
Corrected Creatinine, Overnight (mg/dL) Creatinine Overnight Dwell – (Glucose Overnight Dwell x 0.00010386)
24 Hour Urine Creatinine Clearance (Residual Renal Creatinine Clearance)  
Creatinine Clearance (mL/min/1.73m2) (Urine Creatinine/Blood Creatinine) x (Urine Volume (mL)/Urine Collection Time (min)) x (1.73/BSA)
Body Surface Area (BSA) Adult (≥16 years) uses DuBois and DuBois formula
  BSA (m²) = 0.007184 x Wt^0.425 x Ht^0.725
  Pediatric (< 16 years) uses Haycock formula
  BSA (m²) = 0.024265 x Wt^0.5378 x Ht^0.3964
  where weight (Wt) is in kilograms and height (Ht) is in centimeters
Residual Urea Clearance, KrU – for Hemodialysis only  
KrU (mL/min) (Urine Urea Nitrogen x Urine Volume (mL)) / (Blood BUN x 0.9 x Total Urine Collection Time (min))
Kt/V Residual (Urine Urea Nitrogen/Blood BUN) x (Urine Volume (mL)/ Urine Collection Time (min))  x (10.08/VSA)
Volume (V) from Surface Area (Liters) Adult (≥16 years) uses Hume and Weyers formula  
  Male: V= -14.012934 + 0.296785 x Wt + 0.194786 x Ht 
  Female: V = -35.270121 + 0.183809 x Wt + 0.344547 x Ht 
  Pediatric (<16 years) uses Friis-Hansen formula 
  V = 0.135 x Wt^0.6660.666 x Ht^0.535
  where weight (Wt) is in kilograms and height (Ht) is in centimeters
24 Hour Urine Creatinine  
Urine Creatinine, 24 Hour (g/24 hr) ((Urine Creatinine in mg/dL x Urine Volume in mL)/100) x (1440 / Total Urine Collection Time in min)
 
24 Hour Urine Urea Nitrogen  
Urine Urea Nitrogen, 24 Hour    (g/24 hr) ((Urine Urea Nitrogen in mg/dL/100) x (Urine Volume in mL/(Total Urine Collection Time in mins/1440)))/1000
24 Hour Urine Total Protein with Creatinine  
Urine Protein, 24 Hour (g/24 hr) (Urine Total Protein/100) x ((Urine Volume in mL)/(Total Urine Collection Time in mins/1440))
Urine Total Protein/ Creatinine Ratio, 24 Hour (mg/g creat) ((Urine Total Protein/100) x ((Urine Volume in mL)/(Total Urine Collection Time in mins/1440)))/(((Urine Creatinine/100) x (Urine Volume in mL/(Total Urine Collection Time in mins /1440)))/1000)
Urine Creatinine, 24 Hour (g/24 hr) ((Urine Creatinine/100) x (Urine Volume in mL/(Total Urine Collection Time in mins/1440)))/1000
Random Urine Total Protein with Creatinine  
Urine Total Protein/ Creatinine Ratio (mg/g creat) (Total Protein, Random Urine/Creatinine, Random Urine) x 1000
Gotch PD QA  
Corrected Creatinine, PD QA (mg/dL) (Corrected Creatinine, PD QA – Glucose PD QA x 0.00010386)
Total Protein, PD QA (g/dL) Total Protein, PD QA / 1000
   
Gotch PD Exchange 1  
Corrected Creatinine, PD Exchange 1 (mg/dL) (Corrected Creatinine, PD Exchange 1 – Glucose PD Exchange 1 x 0.00010386)
Total Protein, PD Exchange 1 (g/dL) Total Protein, PD Exchange 1 / 1000
   
Gotch PD Exchange 2  
Corrected Creatinine, PD Exchange 2 (mg/dL) (Corrected Creatinine, PD Exchange 2 – Glucose PD Exchange 2 x 0.00010386)
Total Protein, PD Exchange 2 (g/dL) Total Protein, PD Exchange 2 / 1000
   
Gotch PD Exchange 3  
Corrected Creatinine, PD Exchange 3 (mg/dL) (Corrected Creatinine, PD Exchange 3 – Glucose PD Exchange 3 x 0.00010386)
Total Protein, PD Exchange 3 (g/dL) Total Protein, PD Exchange 3 / 1000
   
Gotch PD Exchange 4  
Corrected Creatinine, PD Exchange 4 (mg/dL) (Corrected Creatinine, PD Exchange 4 – Glucose PD Exchange 4 x 0.00010386)
Total Protein, PD Exchange 4 (g/dL) Total Protein, PD Exchange 4 / 1000
   
Gotch PD Exchange 5  
Corrected Creatinine, PD Exchange 5 (mg/dL) (Corrected Creatinine, PD Exchange 5 – Glucose PD Exchange 5 x 0.00010386)
Total Protein, PD Exchange 5 (g/dL) Total Protein, PD Exchange 5 / 1000
Calculations – DOWNLOAD