| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| HIV 1 nucleic acid assay | Component | False | Substance | Inferred relationship | Some |  | 
| Serum antimicrobial level, immunoassay method | Component | False | Substance | Inferred relationship | Some |  | 
| Needle aspiration for drainage of thyroglossal tract | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Aspiration of wrist using ultrasound guidance (procedure) | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Urine opiates screening test | Component | False | Substance | Inferred relationship | Some |  | 
| Faecal fat screening test | Component | False | Substance | Inferred relationship | Some |  | 
| L-dopa suppression test (procedure) | Component | False | Substance | Inferred relationship | Some |  | 
| Receptor binding site activity | Component | True | Substance | Inferred relationship | Some | 1 | 
| Drainage of intracranial space, subarachnoid or subdural by incision or trephination | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Ultrasound scan of pericardium and drainage (procedure) | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Calculus general examination NOS | Component | False | Substance | Inferred relationship | Some |  | 
| Drainage of perianal abscess | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Drainage of perirectal abscess | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Scalp pH measurement (procedure) | Component | False | Substance | Inferred relationship | Some |  | 
| Plasma factor VIII related antigen test (procedure) | Component | True | Substance | Inferred relationship | Some | 1 | 
| Chromosome analysis, cytogenetic procedure AND/OR molecular biology method | Component | False | Substance | Inferred relationship | Some |  | 
| Drainage of lesion of brain tissue NOS | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Oncotic pressure measurement | Component | True | Substance | Inferred relationship | Some | 1 | 
| Blood (WBC) screen for Sandhoff disease | Component | True | Substance | Inferred relationship | Some | 1 | 
| Naloxone test | Component | False | Substance | Inferred relationship | Some |  | 
| Drainage of paracolic abscess | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Ultrasound scan and aspiration of thyroid (procedure) | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Frenckner operation | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Drug measurement | Component | False | Substance | Inferred relationship | Some |  | 
| Blood gases, venous measurement | Component | False | Substance | Inferred relationship | Some |  | 
| Needle aspiration of intraperitoneal abscess (procedure) | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Injection of recurrent laryngeal nerve | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Inorganic salt measurement (procedure) | Component | True | Substance | Inferred relationship | Some | 1 | 
| Anodic stripping voltammetry measurement | Component | True | Substance | Inferred relationship | Some | 1 | 
| T cell gene rearrangement analysis (procedure) | Component | False | Substance | Inferred relationship | Some |  | 
| Urine dipstick for protein | Component | False | Substance | Inferred relationship | Some |  | 
| Injection of scar to reduce cicatrix (procedure) | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Hand injection | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Incision and drainage of testis | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Injection of salivary duct | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Injection of vitreous substitute, pars plana approach | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Aspiration of nasal sinus | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Nerve injection NOS | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Incision and drainage of sublingual abscess, intraoral | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Molecular biology method | Component | False | Substance | Inferred relationship | Some |  | 
| Injection of scrotum | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Other diagnostic lumbar puncture | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Other specified diagnostic spinal puncture | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Drug screen test method, cut off >50 ng/ml | Component | False | Substance | Inferred relationship | Some |  | 
| Serum haptoglobin screening test | Component | False | Substance | Inferred relationship | Some |  | 
| Drainage of breast abscess | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Basal gastric acid output measurement | Component | True | Substance | Inferred relationship | Some | 1 | 
| Cystic fibrosis carrier detection | Component | False | Substance | Inferred relationship | Some |  | 
| Dopamine antagonist test | Component | False | Substance | Inferred relationship | Some |  | 
| Exercise stress test - endocrine | Component | False | Substance | Inferred relationship | Some |  | 
| Amniotic fluid pulmonary surfactant test | Component | False | Substance | Inferred relationship | Some | 3 | 
| Drainage of diaphragm | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Infiltration of neurolytic substance into trigger point (procedure) | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Injection around apophyseal facet of vertebra | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Puncture and drainage of pleural cavity | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Biochemical screening test | Component | True | Substance | Inferred relationship | Some | 1 | 
| Oral fluid replacement | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| High dose dexamethasone suppression test | Component | False | Substance | Inferred relationship | Some |  | 
| pH, total acid measurement (procedure) | Component | False | Substance | Inferred relationship | Some |  | 
| Division of nasolacrimal duct for stricture with drainage | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Cystoscopic suburethral injection in female | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Injection of destructive substance into pituitary gland NEC | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Urine dipstick for haemoglobin | Component | False | Substance | Inferred relationship | Some |  | 
| Sodium restriction test | Component | False | Substance | Inferred relationship | Some |  | 
| Intra-articular injection | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Liver function tests NOS | Component | False | Substance | Inferred relationship | Some |  | 
| 3-Hydroxysebacate measurement | Component | False | Substance | Inferred relationship | Some |  | 
| Arthrotomy of sternoclavicular joint for infection with drainage | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Aspiration of elbow using fluoroscopic guidance (procedure) | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Human epidermal growth factor receptor 2 gene detection by fluorescence in situ hybridization (procedure) | Component | True | Substance | Inferred relationship | Some | 1 | 
| Ketone bodies measurement, quantitative | Component | False | Substance | Inferred relationship | Some |  | 
| Aspiration of intracranial substance (procedure) | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Chromosome breakage assay (procedure) | Component | False | Substance | Inferred relationship | Some |  | 
| Intramuscular chemotherapy | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Ratio measurement | Component | False | Substance | Inferred relationship | Some | 2 | 
| Low dose dexamethasone suppression test | Component | False | Substance | Inferred relationship | Some |  | 
| Incision and drainage of furuncle | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Metasystox measurement | Component | True | Substance | Inferred relationship | Some | 1 | 
| Excision of tail of pancreas and drainage of pancreatic duct | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Pentagastrin stimulation test | Component | False | Substance | Inferred relationship | Some |  | 
| Drainage of abscess of nasal septum | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Drug screen | Component | False | Substance | Inferred relationship | Some |  | 
| Trichlorophenoxyacetate measurement | Component | True | Substance | Inferred relationship | Some | 1 | 
| Incision and drainage of retropharyngeal tissue | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| DNA analysis, antenatal, amniotic fluid | Component | False | Substance | Inferred relationship | Some |  | 
| Gastric fluid analysis, total acid measurement | Component | False | Substance | Inferred relationship | Some |  | 
| Nucleic acid sequencing (procedure) | Component | False | Substance | Inferred relationship | Some |  | 
| Drainage of ovarian cyst | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Other specified partial excision of esophagus | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Administration of substance via topical route | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| 2-hydroxybutyrate dehydrogenase measurement | Component | False | Substance | Inferred relationship | Some |  | 
| Arthrotomy with drainage of metatarsophalangeal joint | Direct substance | False | Substance | Inferred relationship | Some | 2 | 
| Therapeutic aspiration of musculoskeletal system NOS | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Transvaginal drainage of ovarian cyst | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Very long chain fatty acids measurement | Component | True | Substance | Inferred relationship | Some | 1 | 
| Aspiration of peritoneal drain | Direct substance | False | Substance | Inferred relationship | Some | 1 | 
| Cerebrospinal fluid IgG synthesis rate | Component | False | Substance | Inferred relationship | Some |  | 
| Resorption rate measurement, gastrointestinal | Component | False | Substance | Inferred relationship | Some |  | 
| Gene replacement therapy | Component | False | Substance | Inferred relationship | Some |  | 
| Prothrombin gene (20210) screen (procedure) | Component | True | Substance | Inferred relationship | Some | 1 | 
| Drainage of nasolacrimal duct | Direct substance | False | Substance | Inferred relationship | Some | 1 |