CALCULATIONS
Adjusted Calcium (mg/dL), only to Albumins <4.0 g/dL |
||||
| Calculation | 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<4.0g/dL | |||
Adjusted Calcium Phosphorus Product (mg2/dL2), only to Albumins <4.0g/dL |
||||
| Calculation | [Total Calcium (mg/dL)+0.8x{4.0-Albumin(g/dL)}] x Phosphorus | |||
| Included In | Adjusted Calcium Phosphorus Product
Comprehensive Metabolic Panel 24 hours |
|||
| Note | Calculation provided only when Albumin is<4.0g/dL | |||
A/G Ratio |
||||
| Calculation | Albumin/Globulin | |||
| Included In | Comprehensive Metabolic Panel
Comprehensive Metabolic Panel w/Phosphorus |
|||
Anion GAP (mEq/L) |
||||
| Calculation | Sodium – (Chloride + CO2) | |||
| Included In | Basic Metabolic Panel
Comprehensive Metabolic Panel Comprehensive Metabolic Panel w/ Phosphorus Electrolytes Renal Function Panel |
|||
Body Surface Area (m2) |
||||
| Calculation | Adult (>= 16 years) uses DuBois and DuBois formula
Pediatric (< 16 years) uses Haycock formula
|
|||
| Included In | Urine Creatinine Clearance | |||
Calcium Phosphorus Product (mg2/dL2) |
||||
| Calculation | Total Calcium x Phosphorus | |||
| Included In | Calcium Phosphorus Product
Adjusted Calcium Phosphorus Product Comprehensive Metabolic Panel w/Phosphorus |
|||
Cholesterol/HDL Ratio |
||||
| Calculation | Cholesterol/HDL | |||
| Included In | Lipid Panel (Coronary Risk Profile) | |||
Corrected Creatinine, 0 Hour, 2 Hour, 4 Hour (mg/dL) |
||||
| Calculation | Creatinine at 0 or 2 or 4 Hour Dwell–(Glucose at 0 or 2 or 4 Hour Dwellx0.00010386) | |||
| Included In | PET, Standard
PET, Fast – 4 Hour only |
|||
Corrected Creatinine, 24 Hour (mg/dL) |
||||
| Calculation | Creatinine at 24 Hour Dwell–(Glucose at 24 Hour Dwellx0.00010386) | |||
| Included In | PD Adequacy
Fluid, 24 Hour Dwell |
|||
Corrected Creatinine, Overnight (mg/dL) |
||||
| Calculation | Creatinine Overnight Dwell–(Glucose Overnight Dwellx0.00010386) | |||
| Included In | Fluid, Overnight Dwell | |||
Corrected Creatinine D/P, 0 Hour |
||||
| Calculation | Corrected Creatinine at 0 Hour Dwell/Plasma Creatinine at 2 Hour Dwell | |||
| Included In | PET, Standard | |||
Corrected Creatinine D/P, 2 Hour |
||||
| Calculation | Corrected Creatinine at 2 Hour Dwell/Plasma Creatinine at 2 Hour Dwell | |||
| Included In | PET, Standard | |||
Corrected Creatinine D/P, 4Hour |
||||
| Calculation | Corrected Creatinine at 4 Hour Dwell/Plasma Creatinine at 2 Hour Dwell | |||
| Included In | PET, Standard
PET, Fast |
|||
Creatinine Clearance, Urine (Residual Renal Creatinine Clearance) |
||||
| Calculation |  |
|||
| Included | Urine Creatinine Clearance | |||
| Note | Where Wt is Dry Weight in kg and Ht is Height in cm. | |||
Creatinine Reduction Ratio |
||||
| Calculation | [1– (Post Creatinine/Pre Creatinine)]x100 | |||
| Included In | Post BUN w/URR, CRR
Post BUN w/URR, Kt/V |
|||
GFR (mL/min/1.73 m2) (IDMS-Traceable Modification of Diet in Renal Disease (MDRD) |
||||
| Calculation | 175x(Scr)-1.154x (age)-0.203x(0.742 if female)x(1.210 if African American) | |||
| Included In | GFR (CKD, Non Dialysis) | |||
Globulin (g/dL) |
||||
| Calculation | Total Protein–Albumin | |||
| Included In | Comprehensive Metabolic Panel
Comprehensive Metabolic Panel w/Phosphorus |
|||
Glucose D/DO, 2 Hour |
||||
| Calculation | Glucose at 2 Hour Dwell/Glucose at 0 Hour Dwell | |||
| Included In | PET, Standard | |||
Glucose D/DO, 4 Hour |
||||
| Calculation | Glucose at 4 Hour Dwell/Glucose at 0 Hour Dwell | |||
| Included In | PET, Standard | |||
Hemoglobinx3 (g/dL) |
||||
| Calculation | Hemoglobinx3 | |||
| Included In | Complete Blood Count (CBC) & Differential
Complete Blood Count (CBC) & Differential w/Reticulocytes Hemoglobin Hemoglobin & Hematocrit Hemogram (Complete Blood Count w/o Differential) |
|||
Residual Urea Clearance, KrU (mL/min) – for Hemodialysis only |
||||
| Calculation |  |
|||
| Included In | Residual Urea Clearance (KrU) | |||
Kt/V Equilibrated |
||||
| Calculation | (0.924 x lnKt/V) – ((0.395 x lnKt/V) / (Min / 60)) + 0.056
(Leypoldt Formula) |
|||
| Included In | Kt/V Standard, Equilibrated, URR | |||
| Note | For patient dialyzing 2 or 4-6 times per week | |||
Kt/V Jindal (Not K/DOQI Recommended) |
||||
| Calculation | (0.04 x ((Pre BUN – Post BUN) / Pre BUN x 100) – 1.2)
(Jindal Formula) |
|||
| Included In | URR | |||
| Note | 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 |
||||
| Calculation | 
(Daugirdas II Formula) |
|||
| Included In | Kt/V Natural Log, URR Kt/V Standard, Equilibrated, URR |
|||
| Note | 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 |
||||
| Calculation | (168*(1-exp(-eqKt/V))/(Min/60))/((1-exp(-eqKt/V))/eqKt/V+(168/N/(Min/60))-1)
(Leypoldt Formula) |
|||
| Included In | Kt/V Standard, Equilibrated, URR | |||
| Note | For patient dialyzing 2 or 4-6 times per week | |||
Low Density Lipoprotein (mg/dL) |
||||
| Calculation | Cholesterol–(Very Low Density Lipoprotein + HDL) | |||
| Included In | Lipid Panel (Coronary Risk Profile) | |||
nPNA, Hemodialysis |
||||
| Calculation |
|
|||
| 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. | |||
PD ADEQUACY CALCULATIONS |
||||
Weekly Total Kt/V |
||||
| Calculation | Weekly Residual Kt/V + Weekly Dialysate Kt/V | |||
Weekly Residual Kt/V |
||||
| Calculation | ((Urine Urea Nitrogen/BUN) * (Urine Volume in mL/Urine Collection Time in minutes) * 10.08) / VSA | |||
Weekly Dialysate Kt/V |
||||
| Calculation | ((Dialysate Urea Nitrogen/BUN) * (24 hour Dialysate Drain Volume in mL/1000) * 7) / VSA | |||
Weekly Total Creatinine Clearance (Liters/week/1.73 m2) |
||||
| Calculation | Weekly Residual GFR + Weekly Dialysate Creatinine Clearance | |||
Weekly Residual GFR (Liters/week/1.73 m2) |
||||
| Calculation | Arithmetic Mean of Weekly Urea Clearance and Weekly Creatinine Clearance | |||
| ((Urine Urea Nitrogen/BUN) * (Urine Volume in mL/Urine Collection Time in minutes) * 10.08) + (Urine Creatinine/Plasma Creatinine * Urine Volume in mL/Urine Collection Time in minutes * 10.08))/2*1.73/BSA | ||||
Weekly Dialysate Creatinine Clearance (Liters/week/1.73 m2) |
||||
| Calculation | (Dialysate Corrected Creatinine/Plasma Creatinine) * (24 hour Dialysate Drain Volume in mL/1000) * 7 * 1.73/BSA | |||
Volume from Surface Area (Liters) |
||||
| Calculation | Adult (>= 16 years) uses Hume and Wyers 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 Wt0.666 x Ht0.535 where weight (Wt) is in kilograms and height (Ht) is in centimeters |
|||
Protein Nitrogen Appearance (PNA) |
||||
| Calculation |  |
|||
|
PET FAST |
||||
| Refer to chart at the end of this Appendix. | ||||
PET STANDARD |
||||
| Refer to chart at the end of this Appendix. | ||||
| Included In | PD Adequacy | |||
Prothrombin Time (Protime): INR |
||||
| Calculation | (PT Ratio)ISI
PT Ratio = (Patient PT/Mean Normal PT)ISI Mean Normal PT = Geometric Mean ISI = International Sensitivity Index |
|||
| Included In | Prothrombin Time (PT) | |||
% Recirculation |
||||
| Calculation |  |
|||
| Included In | Recirculation Study | |||
Total Iron Binding Capacity (TIBC) (µg/dL) |
||||
| Calculation | Transferrin x 1.4 | |||
| Included In | Iron Status w/ Iron & Transferrin | |||
% Transferrin Saturation |
||||
| Calculation | (Iron/(Transferrin x 1.4)) x 100 | |||
| Included In | Iron Status w/ Iron & Transferrin | |||
Urea D/P, 0 Hour |
||||
| Calculation | Urea at 0 Hour Dwell/Urea at 2 Hour Dwell | |||
| Included In | PET, Standard | |||
Urea D/P, 2 Hour |
||||
| Calculation | Urea at 2 Hour Dwell/Urea at 2 Hour Dwell | |||
| Included In | PET, Standard | |||
Urea D/P, 4 Hour |
||||
| Calculation | Urea at 4 Hour Dwell/Urea at 2 Hour Dwell | |||
| Included In | PET, Standard | |||
Urea Reduction Ratio (%) |
||||
| Calculation | [1 – (Post BUN/Pre BUN)] x 100 | |||
| Included In | Kt/V Jindal (Not K/DOQI Recommended Kt/V Natural Log, URR Kt/V Standard, Equilibrated, URR |
|||
Urine Creatinine, 24 Hour (mg/24 hour) |
||||
| Calculation | (Urine Creatinine/100) xTotal Urine Volume in mL | |||
| Included In | 24 Hour Urine Creatinine | |||
Urine Urea Nitrogen, 24 Hour (g/24 hour) |
||||
| Calculation | [(Urine Urea Nitrogen in mg/dL/100) x Total Urine Volume in mL] / 1000 | |||
| Included In | 24 Hour Urine Urea Nitrogen | |||
Very Low Density Lipoprotein (mg/dL) |
||||
| Calculation | Triglycerides/5* | |||
| Included In | Lipid Panel(Coronary Risk Profile)
* Only provided if Triglycerides are<400 mg/dL |
|||
Calculation