bluebutton/_site/lib/parsers/ccda/allergies.js

BlueButton.js helps developers navigate complex health data with ease.

/*
 * Parser for the CCDA allergies section
 */

Parsers.CCDA.allergies = function (ccda) {
  
  var parseDate = Documents.parseDate;
  var parseName = Documents.parseName;
  var parseAddress = Documents.parseAddress;
  var data = [], el;
  
  var allergies = ccda.section('allergies');
  
  allergies.entries().each(function(entry) {
    
    el = entry.tag('effectiveTime');
    var start_date = parseDate(el.tag('low').attr('value')),
        end_date = parseDate(el.tag('high').attr('value'));
    
    el = entry.template('2.16.840.1.113883.10.20.22.4.7').tag('code');
    var name = el.attr('displayName'),
        code = el.attr('code'),
        code_system = el.attr('codeSystem'),
        code_system_name = el.attr('codeSystemName');
    
    // value => reaction_type
    el = entry.template('2.16.840.1.113883.10.20.22.4.7').tag('value');
    var reaction_type_name = el.attr('displayName'),
        reaction_type_code = el.attr('code'),
        reaction_type_code_system = el.attr('codeSystem'),
        reaction_type_code_system_name = el.attr('codeSystemName');
    
    // reaction
    el = entry.template('2.16.840.1.113883.10.20.22.4.9').tag('value');
    var reaction_name = el.attr('displayName'),
        reaction_code = el.attr('code'),
        reaction_code_system = el.attr('codeSystem');
    
    // severity
    el = entry.template('2.16.840.1.113883.10.20.22.4.8').tag('value');
    var severity = el.attr('displayName');
    
    // participant => allergen
    el = entry.tag('participant').tag('code');
    var allergen_name = el.attr('displayName'),
        allergen_code = el.attr('code'),
        allergen_code_system = el.attr('codeSystem'),
        allergen_code_system_name = el.attr('codeSystemName');

    // this is not a valid place to store the allergen name but some vendors use it
    if (!allergen_name) {
      el = entry.tag('participant').tag('name');
      if (!el.isEmpty()) {
        allergen_name = el.val();
      }
    }
    
    // status
    el = entry.template('2.16.840.1.113883.10.20.22.4.28').tag('value');
    var status = el.attr('displayName');
    
    data.push({
      date_range: {
        start: start_date,
        end: end_date
      },
      name: name,
      code: code,
      code_system: code_system,
      code_system_name: code_system_name,
      status: status,
      severity: severity,
      reaction: {
        name: reaction_name,
        code: reaction_code,
        code_system: reaction_code_system
      },
      reaction_type: {
        name: reaction_type_name,
        code: reaction_type_code,
        code_system: reaction_type_code_system,
        code_system_name: reaction_type_code_system_name
      },
      allergen: {
        name: allergen_name,
        code: allergen_code,
        code_system: allergen_code_system,
        code_system_name: allergen_code_system_name
      }
    });
  });
  
  return data;
};