المعادالت الحسابية لبعض التحاليلالطبية

 Hb conc. = (Normal Hb X Calculated HCT) / Normal HCT

Hb % adult male = Hb * 6.4

Hb % adult female = Hb * 6.6

Hb % child = Hb * 6.9

Hb = Reading x 36.77 = ……gm. X 6.9 = ……Hb% .

Hct= Hb* 3+1

Ht = Hb(gm) x 3.3 = ……%

MCV = [ Ht / RBC's ] x 10 = ……Fl (femto liter)

MCH = [ Hb(gm) / RBC's ] x 10 = ….Pg (Pico grams)

MCHC = (Hb / HCT) X 100

Reticulocyte (%) = (Number of Reticulocyte / Number of RBCs) X 100

Reticulocyte (%) = ( مجموع عدد الخاليا الموجودة فى الفيلم100لعشرة حقول/مجموع عدد كرات الدم الحمراء لعشرة حقول * =

….%

Reticulocyte index = Reticulocyte count X (Patient HCT / Normal HCT)

corrected Reticulocyte count= retic% X patient Hct/normal HctAverage

normal hct is 45 for men and 42 for women.

Transferrin saturation (%) = (Serum iron level x 100%) / TIBC

Unsaturated iron-binding capacity ( UIBC ) = Total iron-binding capacity ( TIBC ) – iron

Normal range Transferrin saturation (%) male = 20 – 50 %

Normal range Transferrin saturation (%) female = 15 – 50 %

LDL mg/dl = cholesterol – HDL – ( Triglyceride /5 )

and if cholesterol and triglyceride are high use another equation:

LDL mg/dl = cholesterol – HDL – ( 0.16 * triglyceride )

VLDL=TG/5

HbA1c = 0.017 * fructoseamine + 1.61

Fructosamine = ( HbA1c – 1.61 ) * 58.82

BUN [mg/dL]= Urea [mg/dL] / 2.14

Or

BUN (in mg/dL of nitrogen) = Urea (in mmol/L) * 2.8

Or

BUN [mmol/L]= 2x urea [mmol/L]

Creatinine clearance (mL/min): Formula:

(140 – Age) x wt (kg) x F} / (Plasma Creatinine * 0.8136)

Where F = 1 if male, and 0.85 if female

Or

Creatinine clearance (mL/min):Formula:

(140 – Age) x wt (kg) x F} / serum Creatinine * 72)

Where F = 1 if male, and 0.85 if female

GFR ….FOR MALE = (140-age) * (Wt in kg) / (72 * Cr)

GFR ….FOR FEMALE= (140-age) * (Wt in kg)) / (72 * Cr) X 0.85

Or

Creatinine clearance (mL/min)=urine creatinine*urine volume\serum creatinine*Time min

normal range :male 97_137 ml\min

normal range :female 88_128 ml\min

C=(Uc x Tv) / (Sc x 60 x 24)

C: Creatinine Clearance

Uc: مستوى الكرياتينين في البول

Sc: مستوى الكرياتينين في السيرم

Tv: ساعة24حجم البول الُمجّمع في الـ

ساعة هي عدد ساعات اليوم : 24

هو عدد الدقائق في الساعة الواحدة : 60

Protein conc (g/l) =Abs sample / Abs standard x standard conc.

To determine the 24 hour urinary protein, measure the 24hour urinevolume in ml and assay the urine for protein content (g/l) as perprocedure. Calculate the 24 hour urinary protein using the followingformula :

Protein (g/24h) = urinary Protein (g/l) x TU/1000

Where TU = 24 hour urine volume in ml and 1000 = Converts ml/day to litre/day

Calculated Free Calcium ( ionized calcium ) in mmol/Litre

i) % Protein bound = 0.8 x Albumin (g/L) + 0.2 x Globulin (g/L) + 3

ii) Calculated Free Calcium (mg / d l ) = T o t a lcalcium – Protein bound Calcium

iii) Calculated Free Calcium i n mmo l / L i t r e =Calculated Free Calcium (mg/dl) x 0.25

Or

ionized calcium =( total ca _ Alb + 4) / 2

Or

ionized calcium = ( total ca * 6 – t.protein / 3) / t.protein +6

Normal range of calcium = 8.8 – 10.5 mg/dl Or 2.2 – 2.55 mmol/l

Corrected calcium(mg/dl) = serum calcium(mg/dl) + 0.8 (4 – serum albumin(g/dl))

OR

Corrected Calcium ( mmol/L) = Calcium (measured, mmol/L) + {(40 – albumin (g/L)) x 0.02}

calcium (mmol/L) = Calcium (mg/dL) x 0.25

albumin (g/L)= Albumin (g/dL) x 10

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