MediaWiki:Gadget-calculator-anatomyPhysiology.js
From WikiAnesthesia
Revision as of 14:54, 12 August 2021 by Chris Rishel (talk | contribs) (Chris.Rishel moved page MediaWiki:Gadget-calculator-patientStats.js to MediaWiki:Gadget-calculator-anatomyPhysiology.js without leaving a redirect)
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( function() {
var moduleId = 'patientStats';
mw.calculators.addUnitsBases( {
hgb: {
toString: function( units ) {
units = units.replace( 'hgbperdL', '/dL' );
units = units.replace( 'pcthct', '%' );
return units;
}
}
} );
mw.calculators.addUnits( {
pcthct: {
baseName: 'hgb',
digits: 0
},
ghgbperdL: {
baseName: 'hgb',
digits: 1,
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'
]
},
minHct: {
name: 'Minimum hematocrit',
type: 'number',
abbreviation: 'Min hct',
defaultValue: '21 pcthct',
maxLength: 4,
units: [
'pcthct',
'ghgbperdL'
]
},
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'
]
}
} );
mw.calculators.addCalculations( {
bladeMacSize: {
name: 'Laryngoscope blade size (MAC)',
abbreviation: 'Blade (MAC)',
data: {
variables: {
required: [ 'age' ]
}
},
type: 'string',
references: [
'Smith\'s Anesthesia for Infants and Children. 8e. p356'
],
calculate: function( data ) {
var age = data.age.toNumber( 'yo' );
if( age >= 6 ) {
return '3';
} else if( age >= 1 ) {
// ( age + 16 ) / 4
// To nicely display in increments of 0.5, double the calculation, round (floor), then divide by 2
return '2';
} else {
return '-';
}
}
},
bladeMillerSize: {
name: 'Laryngoscope blade size (Miller)',
abbreviation: 'Blade (Miller)',
data: {
variables: {
required: [ 'age' ]
}
},
type: 'string',
references: [
'Smith\'s Anesthesia for Infants and Children. 8e. p356'
],
calculate: function( data ) {
var age = data.age.toNumber( 'yo' );
if( age >= 2 ) {
return '2';
} else if( age >= 1 / 12 ) {
return '1';
} else if( age >= 0 ) {
return '0-1';
} else {
return '0';
}
}
},
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;
}
}
},
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;
}
},
ettDepth: {
name: 'Endotracheal tube depth',
abbreviation: 'ETT depth',
data: {
variables: {
required: [ 'age' ]
}
},
type: 'string',
references: [
'Smith\'s Anesthesia for Infants and Children. 8e. p356'
],
calculate: function( data ) {
var age = data.age.toNumber( 'yo' );
var depth;
if( age >= 12 ) {
depth = '20+';
} else if( age >= 2 ) {
// ( age / 2 ) + 12
depth = Math.round( age / 2 + 12 );
} else if( age >= 1 ) {
depth = 12;
} else if( age >= 0.5 ) {
depth = 11;
} else if( age >= 0 ) {
depth = 9;
} else {
depth = '7-8';
}
return depth + ' cm from teeth';
}
},
ettSize: {
name: 'Endotracheal tube size',
abbreviation: 'ETT size',
data: {
variables: {
required: [ 'age' ]
}
},
type: 'string',
references: [
'Smith\'s Anesthesia for Infants and Children. 8e. p356'
],
calculate: function( data ) {
var age = data.age.toNumber( 'yo' );
var size;
if( age >= 12 ) {
size = '6+';
} else if( age >= 1 ) {
// ( age + 16 ) / 4
// To nicely display in increments of 0.5, double the calculation, round (floor), then divide by 2
size = String( Math.floor( 2 * ( ( age + 16 ) / 4 ) ) / 2 );
} else if( age >= 0.5 ) {
size = '3.5-4';
} else if( age >= 0 ) {
size = '3-3.5';
} else {
size = '2.5-3';
}
return size + ' mm (ID)';
}
},
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;
}
},
lmaSize: {
name: 'Laryngeal mask airway size',
abbreviation: 'LMA size',
data: {
variables: {
required: [ 'weight' ]
}
},
type: 'string',
references: [
'Smith\'s Anesthesia for Infants and Children. 8e. p312'
],
calculate: function( data ) {
var weight = data.weight.toNumber( 'kgwt' );
var size;
if( weight > 100 ) {
size = '6';
} else if( weight > 70 ) {
size = '5';
} else if( weight > 50 ) {
size = '4';
} else if( weight > 30 ) {
size = '3';
} else if( weight > 20 ) {
size = '2.5';
} else if( weight > 10 ) {
size = '2';
} else if( weight > 5 ) {
size = '1.5';
} else {
size = '1';
}
return size;
}
},
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;
}
}
} );
var tableMaxWidth = 600;
mw.calculators.addCalculators( moduleId, {
anatomy: {
name: 'Patient statistics',
calculations: [
'bmi',
'bsa',
'ibw',
'lbw'
],
css: {
'max-width': tableMaxWidth
},
table: true
},
airway: {
name: 'Airway management',
calculations: [
'bladeMacSize',
'bladeMillerSize',
'ettSize',
'ettDepth',
'lmaSize'
],
css: {
'max-width': tableMaxWidth
},
table: true
},
fluidManagement: {
name: 'Fluid management',
calculations: [
'fluidMaintenanceRate',
'intraopFluids',
'ebv',
'maxAbl',
'minUop'
],
css: {
'max-width': tableMaxWidth
},
table: true
}
} );
}() );