Formulae
http://www.ncemi.org/default.htm (Calculators); http://athena.usask.ca/growthutility/phv_ui.cfm?type=2 (Prediction of Adult Height)
http://www.vh.org/adult/provider/familymedicine/FPHandbook/Chapter23/10-23.html (Formulae);
http://www.emedicine.com/splash/etools_xml.pl?file=apache_ii_score_for_adults&prog=edecision (Apache score)
http://www.trauma.org/scores/gcs.html (Glasgow Coma Score)
http://www.emedicine.com/quickref.shtml (TOOLS) ********
http://knowledge.emedicine.com/splash/shared/etools/index.htm (E-TOOLS)
http://www.mdcalc.com/ *****************************
1) Serum Osmolality: 2*Na + BUN/2.8 + GLU/18 + ETOH/4.6 (N=285-295 mosm/kg)http://www.fpnotebook.com/REN78.htm
2) NaHco3 Replacement: Base Deficit(meq/l) *Wt(kgs) /4 (Give half the deficit over 8-12 hrs; In Cardiac arrest, give it immediately)
http://www.ncemi.org/cgi-ncemi/edcalc.pl?TheCommand=Load&NewFile=sodium_bicarbonate_replacement&BlankTop=1
3)Na Correction in Hyperglycemia: True Na= Measured Na+ (Serum Glucose-100)/100 * 1.6
http://www.ncemi.org/cgi-ncemi/edcalc.pl?TheCommand=Load&NewFile=sodium_correction_in_hyperglycemia&BlankTop=1
4)Alveolar-arterial Gradient (http://www.fpnotebook.com/REN52.htm);
http://www.ncemi.org/cgi-ncemi/edcalc.pl?TheCommand=Load&NewFile=room_air_alveolar-arterial_gradient&BlankTop=1
A-a (O2)= (FiO2%/100) * (Patm - 47 mmHg) - (PaCO2/0.8) - PaO2 (all units mmHg)
5)Anion Gap= Na-Cl+HCO3; (http://www.fpnotebook.com/REN56.htm)
(Normal Anion Gap: 12 +/- 2 meq/L )
6)BMI: (Weight in kg)/((Height in meters)*(Height in meters))
http://www.ncemi.org/cgi-ncemi/edcalc.pl?TheCommand=Load&NewFile=body_mass_index&BlankTop=1
7) Est. Creatinine Clearance = [[140 - age(yr)]*weight(kg)]/[72*serum Cr(mg/dL)] (multiply by 0.85 for women)
http://www.intmed.mcw.edu/clincalc/creatinine.html;
Timed Cr Clearance: http://www-users.med.cornell.edu/~spon/picu/calc/crclcalc.htm
8) http://www-users.med.cornell.edu/~spon/picu/calc/fenacalc.htm
| FENa = |
UNa * PCr |
x 100 |
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PNa * UCr |
9) Free Water Deficit Tx in Hypernatremia: 0.6 * Weight * (Sodium/140 -1)
http://www.ncemi.org/cgi-ncemi/edcalc.pl?TheCommand=Load&NewFile=free_water_deficit&BlankTop=1
http://www.bcchildrens.ca/NR/rdonlyres/F0674005-EF69-4DAE-9A42-76D7DE69E17D/13009/dkaprt.doc ( DKA Protocol & Tx of Dehydration in Children).
NEW PROTOCOL FOR DKA IN THE ED ( Peds/ ED---PICU/ DKA)
http://www.aau.edu.et/faculties/med/internalmed/Notes/DKA_protocol.htm ( DKA Protocol in Adults)
http://www.medcalc.com/pedifen.html ( Fluids & Electrolytes/ Peds)*****************************************************************
Anion gap (AG) AG = [ Na+] - [ Cl- + HCO3-] Corrected Sodium * Corrected Na+ = [ Na + 1.6 x([ glucose in mg/dl] - 100) Serum Osmolality Plasma osm = 2 x Corrected Na + Glucose/18 + BUN/2.8 * Serum sodium should be corrected for hyperglycemia
http://www.patientcareonline.com/patcare/article/articleDetail.jsp?id=391516 ( Adult Maintenence Fluids; Tx of 'life -threatening' electrolyte abnormalities)***
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http://www.patientcareonline.com/patcare/article/articleDetail.jsp?id=391516&sk=&date=&&pageID=6 ( Tx of Hyponatremia)----Serum Na correction
Na deficit = (Desired Na – serum Na) × 0.6 × body wt in kg
Once the deficit is calculated, the amount of 3% saline solution required to correct it can be determined by dividing the deficit by 513 mEq/L (the concentration of sodium in 3% saline).
http://en.wikipedia.org/wiki/Body_water ( Calculation of Total Body Water) ***
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Tx of Hypernatremia & Maintenance Fluid requirement in Adults:
The 24-hour maintenance fluid requirement can be calculated by using the patient's body weight (in kg) and the following correlations:
First 10 kg body wt = 100 mL/kg Second 10 kg body wt = 40 mL/kg Remainder of body wt = 10 mL/kg
So, for a 70-kg male with a serum sodium of 160 mEq/L, the 24-hour maintenance fluid requirement would be
100 mL/kg × 10 kg = 1000 mL 40 mL/kg × 10 kg = 400 mL 10 mL/kg × 50 kg = 50 mL Total = 1450 mL/d
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Insulin Drip Protocol ( Adults)






10) MAP= (2/3 * Diastolic BP) + (1/3 * Systolic BP)
http://www.ncemi.org/cgi-ncemi/edcalc.pl?TheCommand=Load&NewFile=mean_arterial_pressure&BlankTop=1;
http://en.wikipedia.org/wiki/Mean_arterial_pressure
11)Predicted endotracheal tube size for age= 4 plus (age/4)
http://www.ncemi.org/default.htm
12) Predicted PEF Calculator: http://www.ncemi.org/default.htm (Males)
http://www.ncemi.org/default.htm (Females)
13) Blood alcohol concentration estimation
http://www.ncemi.org/default.htm
(volume ingested in mL x the "proof" of the beverage x 1.463) / (patient weight in lbs)
14) http://medcalc3000.com/imode/QTIntervalCorrection.htm
QTIntervalCorrection
15)Adjusted Calcium= Calcium+ 0.8*(4-Pt. Albumin)
16) http://www.ncemi.org/cgi-ncemi/edcalc.pl? TheCommand=Load&NewFile=ionized_calcium_estimation&BlankTop=1 (Ionized Calcium Estimation)
17)Burns: http://www.regionshospital.com/Regions/Menu/0,1640,11272,00.html
http://www.regionshospital.com/Regions/Menu/0,,4822,00.html
http://josephmstillburncenter.com/cpm/minorburns.pdf
The stable burn patient is then completely undressed, and the percentage of the body surface burned is calculated. Resuscitation begins with placement of large-bore venous catheters and infusion of lactated Ringer's solution according to the Parkland resuscitation formula (4 ml/ kg/% burn, half infused in the first eight hours and the remainder in the next 16 hours).29 A Foley catheter is used to monitor urine output. Patients with extensive burns or burns of critical areas are routinely stabilized and transferred to a burn center for definitive care, according to American Burn Association transfer criteria.24 18) Total Maintenance Fluids ( http://www.outlinemed.com/demo/nephrol/2453.htm)
- Adults: ~2 liters per day, or ~80mL/hr for 70kg person
- Children:
- The "4:2:1" rule is often used to calculate the rate (mL/hr) based on weight (wt)
- Rate = 4mL/kg/hr (up to 10kg) + 2mL/kg/hr (10-20kg) + 1mL/kg/hr (>20kg)
- In general, D5-1/2NS+20mEq/L KCl or Lactated Ringer's should be used for maintenance.
19)Pulse Pressure= SBP-DBP (N=40-60)
http://www.modern-psychiatry.com/pulse_pressure.htm
20) Peri-Operative Fluid Management:
http://www.medana.unibas.ch/eng/amnesix1/efmain.htm#periop
21) LDL = TC-HDL-(TG/5)
22) http://www.mededcenter.com/module_viewer.asp?module=100&page=1#hemoCardIndex
(Hemodynamic Monitoring).
http://www.mededcon.com/card02.htm (CVP).
http://www.lakesidepress.com/pulmonary/books/physiology/chap10b.htm (Mechanical Ventilation)
http://www.lakesidepress.com/pulmonary/papers/eq/eq1.html (Abbreviations in Ventilation).
http://members.nuvox.net/%7Eon.jwclymer/rq/index.html (Respiratory Quotient Calculator)
http://www.pgmeenotes.blogspot.com/ (Acid-Base Balance, Urinary Casts/ Tumor Markers/ Nails/ Pupils)******
http://www.the-abg-site.com/level1.htm (ABG Analysis)
23) Osmotic gap = 290 - [2 (stool Na + stool K)]
24) http://www.mdcalc.com/fena (FENA) http://www.fpnotebook.com/REN60.htm ( FE of HCO3)
http://www.fpnotebook.com/RENCh1.htm ( Acid- Base Disorders/ RTA/ Related Chapters)
25) http://www.mdcalc.com/stemitimiscore |