Class: FHIR::Terminology

Inherits:
Object
  • Object
show all
Defined in:
lib/terminology.rb

Constant Summary collapse

CODE_SYSTEMS = 
{
  'http://snomed.info/sct'=>'SNOMED',
  'http://loinc.org'=>'LOINC',
  'http://www.nlm.nih.gov/research/umls/rxnorm'=>'RXNORM',
  'http://hl7.org/fhir/sid/icd-10'=>'ICD10',
  'http://hl7.org/fhir/sid/icd-10-de'=>'ICD10',
  'http://hl7.org/fhir/sid/icd-10-nl'=>'ICD10',
  'http://hl7.org/fhir/sid/icd-10-us'=>'ICD10',
  'http://www.icd10data.com/icd10pcs'=>'ICD10',
  'http://hl7.org/fhir/sid/icd-9-cm'=>'ICD9',
  'http://hl7.org/fhir/sid/icd-9-cm/diagnosis'=>'ICD9',
  'http://hl7.org/fhir/sid/icd-9-cm/procedure'=>'ICD9',
  'http://hl7.org/fhir/sid/cvx'=>'CVX'
}
@@term_root = 
File.expand_path '../terminology',File.dirname(File.absolute_path(__FILE__))
@@loaded = 
false
@@top_lab_code_units = 
{}
@@top_lab_code_descriptions = 
{}
@@known_codes = 
{}
@@core_snomed = 
{}
@@common_ucum = 
[]

Class Method Summary collapse

Class Method Details

.get_description(system, code) ⇒ Object 



101
102
103
104
105
106
107
108
 
# File 'lib/terminology.rb', line 101

def self.get_description(system,code)
  load_terminology
  if @@known_codes[system]
    @@known_codes[system][code]
  else
    nil
  end
end

.is_core_snomed?(code) ⇒ Boolean

Returns:

  • (Boolean) 


110
111
112
113
 
# File 'lib/terminology.rb', line 110

def self.is_core_snomed?(code)
  load_terminology
  !@@core_snomed[code].nil?
end

.is_known_ucum?(units) ⇒ Boolean

Returns:

  • (Boolean) 


125
126
127
128
 
# File 'lib/terminology.rb', line 125

def self.is_known_ucum?(units)
  load_terminology
  @@top_lab_code_units.values.include?(units) || @@common_ucum.include?(units)
end

.is_top_lab_code?(code) ⇒ Boolean

Returns:

  • (Boolean) 


115
116
117
118
 
# File 'lib/terminology.rb', line 115

def self.is_top_lab_code?(code)
  load_terminology
  !@@top_lab_code_units[code].nil?
end

.lab_description(code) ⇒ Object 



130
131
132
133
 
# File 'lib/terminology.rb', line 130

def self.lab_description(code)
  load_terminology
  @@top_lab_code_descriptions[code]
end

.lab_units(code) ⇒ Object 



120
121
122
123
 
# File 'lib/terminology.rb', line 120

def self.lab_units(code)
  load_terminology
  @@top_lab_code_units[code]
end

.load_terminology ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
 
# File 'lib/terminology.rb', line 32

def self.load_terminology
  if !@@loaded
    begin
      # load the top lab codes
      filename = File.join(@@term_root,'scorecard_loinc_2000.txt')
      raw = File.open(filename,'r:UTF-8',&:read)
      raw.split("\n").each do |line|
        row = line.split('|')
        @@top_lab_code_descriptions[row[0]] = row[1] if !row[1].nil?
        @@top_lab_code_units[row[0]] = row[2] if !row[2].nil?
      end
    rescue Exception => error
      FHIR.logger.error error
    end

    begin
      # load the known codes
      filename = File.join(@@term_root,'scorecard_umls.txt')
      raw = File.open(filename,'r:UTF-8',&:read)
      raw.split("\n").each do |line|
        row = line.split('|')
        codeSystem = row[0]
        code = row[1]
        description = row[2]
        if @@known_codes[codeSystem]
          codeSystemHash = @@known_codes[codeSystem]
        else
          codeSystemHash = {}
          @@known_codes[codeSystem] = codeSystemHash
        end
        codeSystemHash[code] = description
      end
    rescue Exception => error
      FHIR.logger.error error
    end

    begin
      # load the core snomed codes
      @@known_codes['SNOMED'] = {} if @@known_codes['SNOMED'].nil?
      codeSystemHash = @@known_codes['SNOMED']
      filename = File.join(@@term_root,'scorecard_snomed_core.txt')
      raw = File.open(filename,'r:UTF-8',&:read)
      raw.split("\n").each do |line|
        row = line.split('|')
        code = row[0]
        description = row[1]
        codeSystemHash[code] = description if codeSystemHash[code].nil?
        @@core_snomed[code] = description
      end   
    rescue Exception => error
      FHIR.logger.error error
    end

    begin
      # load common UCUM codes
      filename = File.join(@@term_root,'scorecard_ucum.txt')
      raw = File.open(filename,'r:UTF-8',&:read)
      raw.split("\n").each do |code|
        @@common_ucum << code
      end
      @@common_ucum.uniq!
    rescue Exception => error
      FHIR.logger.error error
    end

    @@loaded = true
  end
end

.set_terminology_root(root) ⇒ Object 



28
29
30
 
# File 'lib/terminology.rb', line 28

def self.set_terminology_root(root)
  @@term_root = root
end