المعادلات الحسابية لبعض التحاليل الطبية

•  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 الخلايا الموجودة فى الفيلم لعشرة حقول/مجموع عدد كرات الدم الحمراء لعشرة حقول * 100 = ….%

  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: حجم البول المُجمّع في الـ 24 ساعة

  24 : ساعة هي عدد ساعات اليوم

  60 : هو عدد الدقائق في الساعة الواحدة

  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