Difference between revisions of "MediaWiki:Gadget-calculator-anatomyPhysiology.js"
From WikiAnesthesia
Chris Rishel (talk | contribs) |
Chris Rishel (talk | contribs) |
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toString: function( units ) { | toString: function( units ) { | ||
units = units.replace( 'pcto2', '%' ); | units = units.replace( 'pcto2', '%' ); | ||
return units; | |||
} | |||
}, | |||
temperature: { | |||
toString: function( units ) { | |||
units = units.replace( 'deg', '°' ); | |||
return units; | return units; | ||
Revision as of 03:37, 21 August 2021
( function() {
var moduleId = 'anatomyPhysiology';
mw.calculators.addUnitsBases( {
bpm: {
toString: function( units ) {
units = units.replace( 'bpm', 'beats/min' );
return units;
}
},
hgb: {
toString: function( units ) {
units = units.replace( 'hgbperdL', '/dL' );
units = units.replace( 'pcthct', '%' );
return units;
}
},
o2: {
toString: function( units ) {
units = units.replace( 'pcto2', '%' );
return units;
}
},
temperature: {
toString: function( units ) {
units = units.replace( 'deg', '°' );
return units;
}
}
} );
mw.calculators.addUnits( {
bpm: {
basename: 'bpm'
},
pcthct: {
baseName: 'hgb'
},
pcto2: {
baseName: 'o2'
},
ghgbperdL: {
baseName: 'hgb',
prefixes: 'short',
definition: '3 pcthct'
}
} );
mw.calculators.addVariables( {
caseDuration: {
name: 'Case duration',
type: 'number',
abbreviation: 'Duration',
maxLength: 3,
units: [
'hr',
'min'
]
},
hct: {
name: 'Current hematocrit',
type: 'number',
abbreviation: 'Current hct',
defaultValue: '45 pcthct',
maxLength: 4,
units: [
'pcthct',
'ghgbperdL'
]
},
heartRate: {
name: 'Heart rate',
type: 'number',
abbreviation: 'HR',
defaultValue: '60 bpm',
maxLength: 4,
units: [
'bpm'
]
},
hgb: {
name: 'Hemoglobin',
type: 'number',
abbreviation: 'HgB',
defaultValue: '13 ghgbperdL',
maxLength: 4,
units: [
'pcthct',
'ghgbperdL'
]
},
minHct: {
name: 'Minimum hematocrit',
type: 'number',
abbreviation: 'Min hct',
defaultValue: '21 pcthct',
maxLength: 4,
units: [
'pcthct',
'ghgbperdL'
]
},
paCO2: {
name: 'PaCO<sub>2</sub>',
type: 'number',
abbreviation: 'PaCO<sub>2</sub>',
defaultValue: '40 mmHg',
maxLength: 3,
units: [
'mmHg'
]
},
saO2: {
name: 'SaO<sub>2</sub>',
type: 'number',
abbreviation: 'SaO<sub>2</sub>',
defaultValue: '100 pcto2',
maxLength: 3,
units: [
'pcto2'
]
},
smvO2: {
name: 'SmvO<sub>2</sub>',
type: 'number',
abbreviation: 'SmvO<sub>2</sub>',
defaultValue: '75 pcto2',
maxLength: 3,
units: [
'pcto2'
]
},
npoTime: {
name: 'Time spent NPO',
type: 'number',
abbreviation: 'NPO time',
defaultValue: '8 hr',
maxLength: 2,
units: [
'hr'
]
},
surgicalTrauma: {
name: 'Severity of surgical trauma',
type: 'string',
abbreviation: 'Surgical trauma',
defaultValue: 'Minimal',
options: [
'Minimal',
'Moderate',
'Severe'
]
},
temperature: {
name: 'Temperature',
type: 'number',
abbreviation: 'Temp',
defaultValue: '37 degC',
maxLength: 5,
units: [
'degC',
'degF'
]
}
} );
mw.calculators.addCalculations( {
bmi: {
name: 'Body mass index',
abbreviation: 'BMI',
data: {
variables: {
required: [ 'weight', 'height' ]
}
},
digits: 0,
units: 'kg/m^2',
formula: '<math>\\mathrm{BMI} = \\frac{\\mathrm{mass_{kg}}}{{\\mathrm{height_{m}}}^2}</math>',
link: '[[Body mass index]]',
references: [],
calculate: function( data ) {
return data.weight.toNumber( 'kgwt' ) / Math.pow( data.height.toNumber( 'm' ), 2 );
}
},
bsa: {
name: 'Body surface area',
abbreviation: 'BSA',
data: {
variables: {
required: [ 'weight', 'height' ]
}
},
digits: 2,
units: 'm^2',
formula: '<math>\\mathrm{BSA} = \\sqrt{\\frac{\\mathrm{weight_{kg}}*\\mathrm{height_{cm}}}{3600}}</math>',
link: false,
references: [
'Mosteller RD. Simplified calculation of body-surface area. N Engl J Med. 1987 Oct 22;317(17):1098. doi: 10.1056/NEJM198710223171717. PMID: 3657876.'
],
calculate: function( data ) {
return Math.sqrt( data.height.toNumber( 'cm' ) * data.weight.toNumber( 'kgwt' ) / 3600 );
}
},
ebv: {
name: 'Estimated blood volume',
abbreviation: 'EBV',
data: {
variables: {
required: [ 'weight', 'age' ]
}
},
digits: 0,
units: 'mL',
formula: '',
references: [
'Morgan & Mikhail\'s Clinical Anesthesiology. 5e. p1168'
],
calculate: function( data ) {
var weight = data.weight.toNumber( 'kgwt' );
var age = data.age.toNumber( 'yo' );
var ebvPerKg;
if( age >= 1 ) {
if( data.gender === 'F' ) {
ebvPerKg = 65;
} else {
ebvPerKg = 75;
}
} else if( age >= 1/12 ) {
ebvPerKg = 80;
} else if( age >= 0 ) {
ebvPerKg = 85;
} else {
ebvPerKg = 95;
}
return weight * ebvPerKg;
}
},
fluidMaintenanceRate: {
name: 'Fluid maintenance rate',
abbreviation: 'Fluid maint.',
data: {
variables: {
required: [ 'weight' ]
}
},
digits: 0,
units: 'mL/hr',
formula: '',
references: [
'Miller\'s Anesthesia 7e, section IV, pg. 1728'
],
calculate: function( data ) {
var weight = data.weight.toNumber( 'kgwt' );
// Uses 4-2-1 rule
var maintenanceRate = 4 * Math.min( weight, 10 );
if( weight > 10 ) {
maintenanceRate += 2 * Math.min( weight - 10, 10 );
}
if( weight > 20) {
maintenanceRate += weight - 20;
}
return maintenanceRate;
}
},
intraopFluids: {
name: 'Intraoperative fluid dosing',
abbreviation: 'Intraop fluids',
data: {
calculations: {
required: [ 'fluidMaintenanceRate' ]
},
variables: {
required: [ 'weight', 'npoTime', 'surgicalTrauma' ]
}
},
type: 'string',
references: [
'Corcoran T, Rhodes JE, Clarke S, Myles PS, Ho KM. Perioperative fluid management strategies in major surgery: a stratified meta-analysis. Anesth Analg. 2012 Mar;114(3):640-51. doi: 10.1213/ANE.0b013e318240d6eb. Epub 2012 Jan 16. PMID: 22253274.'
],
calculate: function( data ) {
var weight = data.weight.toNumber( 'kgwt' );
var maintenanceRate = data.fluidMaintenanceRate.toNumber( 'mL/hr' );
var npoTime = data.npoTime.toNumber( 'hr' );
var surgicalTrauma = data.surgicalTrauma;
var output = '';
var npoDeficit = npoTime * maintenanceRate;
var surgicalLossMin, surgicalLossMax;
if( surgicalTrauma === 'Minimal' ) {
surgicalLossMin = 2 * weight;
surgicalLossMax = 4 * weight;
} else if( surgicalTrauma === 'Moderate' ) {
surgicalLossMin = 4 * weight;
surgicalLossMax = 6 * weight;
} else {
surgicalLossMin = 6 * weight;
surgicalLossMax = 8 * weight;
}
var firstHour = Math.round( npoDeficit / 2 ) + maintenanceRate;
var nextHoursMin = Math.round( npoDeficit / 4 ) + maintenanceRate + surgicalLossMin;
var nextHoursMax = Math.round( npoDeficit / 4 ) + maintenanceRate + surgicalLossMax;
var remainingHoursMin = maintenanceRate + surgicalLossMin;
var remainingHoursMax = maintenanceRate + surgicalLossMax;
output += 'NPO deficit: ' + Math.round( npoDeficit ) + ' mL<br/>';
output += 'Surgical losses: ' + surgicalLossMin + '-' + surgicalLossMax + ' mL/hr<br/>';
output += '1st hour: ' + firstHour + ' mL<br/>';
output += '2nd hour: ' + nextHoursMin + '-' + nextHoursMax + ' mL<br/>';
output += '3rd hour: ' + nextHoursMin + '-' + nextHoursMax + ' mL<br/>';
output += '4+ hours: ' + remainingHoursMin + '-' + remainingHoursMax + ' mL<br/>';
return output;
}
},
maxAbl: {
name: 'Maximum allowable blood loss',
abbreviation: 'Max ABL',
data: {
calculations: {
required: [ 'ebv' ]
},
variables: {
required: [ 'weight', 'age', 'hct', 'minHct' ]
}
},
digits: 0,
units: 'mL',
formula: '',
references: [
'Morgan & Mikhail\'s Clinical Anesthesiology. 5e. p1168'
],
calculate: function( data ) {
var currentHct = data.hct.toNumber( 'pcthct' );
var minHct = data.minHct.toNumber( 'pcthct' );
if( currentHct < minHct ) {
return '-';
}
return data.ebv.toNumber( 'mL' ) * ( currentHct - minHct ) / currentHct;
}
},
minUop: {
name: 'Minimum urine output',
abbreviation: 'Min UOP',
data: {
variables: {
required: [ 'weight', 'age' ],
optional: [ 'caseDuration' ]
}
},
type: 'string',
formula: '',
references: [
'Klahr S, Miller SB. Acute oliguria. N Engl J Med. 1998 Mar 5;338(10):671-5. doi: 10.1056/NEJM199803053381007. PMID: 9486997.',
'Arant BS Jr. Postnatal development of renal function during the first year of life. Pediatr Nephrol. 1987 Jul;1(3):308-13. doi: 10.1007/BF00849229. PMID: 3153294.'
],
calculate: function( data ) {
var weight = data.weight.toNumber( 'kgwt' );
var age = data.age.toNumber( 'yo' );
var caseDuration = data.caseDuration ? data.caseDuration.toNumber( 'hr' ) : null;
var minUop;
if( age > 1 ) {
minUop = 0.5 * weight;
} else {
minUop = 1 * weight;
}
if( caseDuration ) {
minUop = minUop * caseDuration + ' mL';
} else {
minUop = minUop + ' mL/hr';
}
return minUop;
}
},
systolicBloodPressure: {
name: 'Systolic blood pressure',
abbreviation: 'SBP',
data: {
variables: {
required: [ 'age' ]
}
},
type: 'string',
references: [
'Baby Miller 6e, ch. 16, pg. 550'
],
calculate: function( data ) {
var age = data.age.toNumber( 'yo' );
var systolicMin, systolicMax, diastolicMin, diastolicMax, meanMin, meanMax;
if( age >= 16 ) {
systolicMin = 100;
systolicMax = 125;
} else if( age >= 13 ) {
systolicMin = 95;
systolicMax = 120;
} else if( age >= 9 ) {
systolicMin = 90;
systolicMax = 115;
} else if( age >= 6 ) {
systolicMin = 85;
systolicMax = 105;
} else if( age >= 3 ) {
systolicMin = 80;
systolicMax = 100;
} else if( age >= 1 ) {
systolicMin = 75;
systolicMax = 95;
} else if( age >= 6 / 12 ) {
systolicMin = 70;
systolicMax = 90;
} else if( age >= 1 / 12 ) {
systolicMin = 65;
systolicMax = 85;
} else {
systolicMin = 60;
systolicMax = 75;
}
}
}
} );
// Cardiovascular
mw.calculators.addCalculations( {
vO2: {
name: 'VO<sub>2</sub>',
abbreviation: 'VO<sub>2</sub>',
data: {
calculations: {
required: [ 'bsa' ]
},
variables: {
optional: [ 'age' ]
}
},
units: 'mL/min',
references: [],
calculate: function( data ) {
var bsa = data.bsa.toNumber();
var age = data.age ? data.age.toNumber( 'yr' ) : null;
if( age >= 70 ) {
return 110 * bsa;
} else {
return 125 * bsa;
}
}
},
cardiacOutputFick: {
name: 'Cardiac output (Fick)',
abbreviation: 'CO (Fick)',
data: {
variables: {
required: [ 'saO2', 'smvO2', 'hgb' ]
},
calculations: {
required: [ 'vO2' ]
}
},
units: 'L/min',
formula: '<math>\\mathrm{CO_{Fick}}=\\frac{VO_2}{(S_aO_2 - S_{mv}O_2) * H_b * 13.4}</math>',
link: false,
references: [],
calculate: function( data ) {
var vO2 = data.vO2.toNumber( 'mL/min' );
var saO2 = data.saO2.toNumber() / 100;
var smvO2 = data.smvO2.toNumber() / 100;
var hgb = data.hgb.toNumber( 'ghgbperdL' );
return vO2 / ( ( saO2 - smvO2 ) * hgb * 13.4 );
}
},
cardiacIndex: {
name: 'Cardiac index',
abbreviation: 'CI',
data: {
calculations: {
required: [ 'bsa', 'cardiacOutputFick' ]
}
},
units: 'L/min/m^2',
formula: '<math>\\mathrm{CI}=\\frac{\\mathrm{CO}}{\\mathrm{BSA}}</math>',
link: false,
references: [],
calculate: function( data ) {
var cardiacOutput = data.cardiacOutputFick.toNumber( 'L/min' );
var bsa = data.bsa.toNumber( 'm^2' );
return cardiacOutput / bsa;
}
},
strokeVolume: {
name: 'Stroke volume',
abbreviation: 'SV',
data: {
variables: {
required: [ 'heartRate' ]
},
calculations: {
required: [ 'cardiacOutputFick' ]
}
},
units: 'mL',
formula: '<math>\\mathrm{SV}=\\frac{\\mathrm{CO}}{\\mathrm{HR}}</math>',
link: false,
references: [],
calculate: function( data ) {
var cardiacOutput = data.cardiacOutputFick.toNumber( 'mL/min' );
var heartRate = data.heartRate.toNumber();
return cardiacOutput / heartRate;
}
}
} );
// Neuro
mw.calculators.addCalculations( {
brainMass: {
name: 'Brain mass',
data: {
variables: {
optional: [ 'age', 'gender' ]
}
},
digits: 0,
units: 'gwt',
references: [
'Dekaban AS. Changes in brain weights during the span of human life: relation of brain weights to body heights and body weights. Ann Neurol. 1978 Oct;4(4):345-56. doi: 10.1002/ana.410040410. PMID: 727739.'
],
calculate: function( data ) {
var age = data.age ? data.age.toNumber( 'yr' ) : null;
var gender = data.gender ? data.gender : null;
var brainMassFemale = 1290;
var brainMassMale = 1450;
if( age !== null ) {
if( age <= 10 / 365 ) {
// <=10 days
brainMassFemale = 360;
brainMassMale = 380;
} else if( age <= 4 * 30 / 365 ) {
// Less than 4 months. This is a gap in the reported data of the paper, so linearly interpolate?
var ageFactor = 1 - ( 4 * 30 / 365 - age ) / ( 4 * 30 / 365 - 10 / 365 );
brainMassFemale = 360 + ageFactor * ( 580 - 360 );
brainMassMale = 380 + ageFactor * ( 640 - 380 );
} else if( age <= 8 * 30 / 365 ) {
// <=8 months
brainMassFemale = 580;
brainMassMale = 640;
} else if( age <= 18 * 30 / 365 ) {
// <=18 months
brainMassFemale = 940;
brainMassMale = 970;
} else if( age <= 30 * 30 / 365 ) {
// <=30 months
brainMassFemale = 1040;
brainMassMale = 1120;
} else if( age <= 43 * 30 / 365 ) {
// <=43 months
brainMassFemale = 1090;
brainMassMale = 1270;
} else if( age <= 5 ) {
brainMassFemale = 1150;
brainMassMale = 1300;
} else if( age <= 7 ) {
brainMassFemale = 1210;
brainMassMale = 1330;
} else if( age <= 9 ) {
brainMassFemale = 1180;
brainMassMale = 1370;
} else if( age <= 12 ) {
brainMassFemale = 1260;
brainMassMale = 1440;
} else if( age <= 15 ) {
brainMassFemale = 1280;
brainMassMale = 1410;
} else if( age <= 18 ) {
brainMassFemale = 1340;
brainMassMale = 1440;
} else if( age <= 21 ) {
brainMassFemale = 1310;
brainMassMale = 1450;
} else if( age <= 30 ) {
brainMassFemale = 1300;
brainMassMale = 1440;
} else if( age <= 40 ) {
brainMassFemale = 1290;
brainMassMale = 1440;
} else if( age <= 50 ) {
brainMassFemale = 1290;
brainMassMale = 1430;
} else if( age <= 55 ) {
brainMassFemale = 1280;
brainMassMale = 1410;
} else if( age <= 60 ) {
brainMassFemale = 1250;
brainMassMale = 1370;
} else if( age <= 65 ) {
brainMassFemale = 1240;
brainMassMale = 1370;
} else if( age <= 70 ) {
brainMassFemale = 1240;
brainMassMale = 1360;
} else if( age <= 75 ) {
brainMassFemale = 1230;
brainMassMale = 1350;
} else if( age <= 80 ) {
brainMassFemale = 1190;
brainMassMale = 1330;
} else if( age <= 85 ) {
brainMassFemale = 1170;
brainMassMale = 1310;
} else {
brainMassFemale = 1140;
brainMassMale = 1290;
}
}
if( gender === 'F' ) {
return brainMassFemale;
} else if( gender === 'M' ) {
return brainMassMale;
} else {
return ( brainMassFemale + brainMassMale ) / 2;
}
}
},
cerebralBloodVolume: {
name: 'Cerebral blood volume',
abbreviation: 'CBV',
data: {
calculations: {
required: [ 'brainMass' ]
}
},
units: 'mL',
description: '4 mL per 100g of brain mass',
references: [
'Tameem A, Krovvidi H, Cerebral physiology, Continuing Education in Anaesthesia Critical Care & Pain, Volume 13, Issue 4, August 2013, Pages 113–118, https://doi.org/10.1093/bjaceaccp/mkt001'
],
calculate: function( data ) {
var brainMass = data.brainMass.toNumber( 'gwt' );
return 4 * brainMass / 100;
}
},
cerebralBloodFlow: {
name: 'Cerebral blood flow',
abbreviation: 'CBF',
data: {
calculations: {
required: [ 'brainMass' ]
},
variables: {
optional: [ 'paCO2' ]
}
},
units: 'mL/min',
description: '50 mL/min per 100g of brain mass. Every mmHg in PaCO2 changes CBF by 1.5 mL/min per 100g of brain mass.',
references: [
'Tameem A, Krovvidi H, Cerebral physiology, Continuing Education in Anaesthesia Critical Care & Pain, Volume 13, Issue 4, August 2013, Pages 113–118, https://doi.org/10.1093/bjaceaccp/mkt001',
'Brian JE Jr. Carbon dioxide and the cerebral circulation. Anesthesiology. 1998 May;88(5):1365-86. doi: 10.1097/00000542-199805000-00029. PMID: 9605698.'
],
calculate: function( data ) {
var brainMass = data.brainMass.toNumber( 'gwt' );
var paCO2 = data.paCO2.toNumber( 'mmHg' );
var cerebralBloodFlow = 50 * brainMass / 100;
if( paCO2 ) {
// CO2 reductions don't reduce CBF more than 50%
var minCerebralBloodFlow = cerebralBloodFlow / 2;
cerebralBloodFlow += 1.5 * brainMass / 100 * ( paCO2 - 40 );
cerebralBloodFlow = math.max( cerebralBloodFlow, minCerebralBloodFlow );
}
return cerebralBloodFlow;
}
},
cerebralMetabolicRateO2: {
name: 'Cerebral metabolic rate (O<sub>2</sub>)',
abbreviation: 'CMRO<sub>2</sub>',
data: {
calculations: {
required: [ 'brainMass' ]
},
variables: {
optional: [ 'temperature' ]
}
},
units: 'mL/min',
description: '3 mL O<sub>2</sub>/min per 100g of brain mass',
references: [
'Tameem A, Krovvidi H, Cerebral physiology, Continuing Education in Anaesthesia Critical Care & Pain, Volume 13, Issue 4, August 2013, Pages 113–118, https://doi.org/10.1093/bjaceaccp/mkt001'
],
calculate: function( data ) {
var brainMass = data.brainMass.toNumber( 'gwt' );
return 3 * brainMass / 100;
}
},
cerebralMetabolicRateGlucose: {
name: 'Cerebral metabolic rate (Glucose)',
abbreviation: 'CMR<sub>glu</sub>',
data: {
calculations: {
required: [ 'brainMass' ]
}
},
units: 'mg/min',
description: '5 mg glucose/min per 100g of brain mass',
references: [
'Tameem A, Krovvidi H, Cerebral physiology, Continuing Education in Anaesthesia Critical Care & Pain, Volume 13, Issue 4, August 2013, Pages 113–118, https://doi.org/10.1093/bjaceaccp/mkt001'
],
calculate: function( data ) {
var brainMass = data.brainMass.toNumber( 'gwt' );
return 5 * brainMass / 100;
}
}
} );
var tableMaxWidth = 600;
mw.calculators.addCalculators( moduleId, {
anatomy: {
name: 'Patient statistics',
calculations: [
'bmi',
'bsa',
'ibw',
'lbw'
],
css: {
'max-width': tableMaxWidth
},
table: true
},
fluidManagement: {
name: 'Fluid management',
calculations: [
'fluidMaintenanceRate',
'intraopFluids',
'ebv',
'maxAbl',
'minUop'
],
css: {
'max-width': tableMaxWidth
},
table: true
},
cardiovascular: {
name: 'Cardiovascular',
calculations: [
'vO2',
'cardiacOutputFick',
'cardiacIndex',
'strokeVolume'
],
css: {
'max-width': tableMaxWidth
},
table: true
},
neuro: {
name: 'Neuro',
calculations: [
'brainMass',
'cerebralBloodVolume',
'cerebralBloodFlow',
'cerebralMetabolicRateO2',
'cerebralMetabolicRateGlucose'
],
css: {
'max-width': tableMaxWidth
},
table: true
}
} );
}() );