| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Poisoning by carbon monoxide from aircraft while in transit, without accident to aircraft, other person injured | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by carbon monoxide from other sources | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by carbon monoxide from other source NOS | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by carbon monoxide NOS | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning by tear gas NOS | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Gases, fumes or vapours causing toxic effect NOS | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Gas/fume NOS - toxic effect | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Intravitreal fluid air exchange | Direct substance | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 3 | 
| Pneumoperitoneum - abdomen | Using substance | False | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Insufflation of fallopian tube using gas | Using substance | False | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Chlorine | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Carbon dioxide | Is a | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Hydrogen cyanide gas | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Oxygen | Is a | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Fluorine gas and hydrogen fluoride | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Arsine | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Lacrimator gas | Is a | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Freon | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Hydrogen sulfide | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Carbon monoxide | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Oxide of nitrogen | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Fume | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Phosgene | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Sulfur dioxide | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Other acute respiratory diseases due to chemical fumes | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Respiratory condition caused by chemical fumes AND/OR vapors | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Toxic inhalation injury | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| [X]Other acute and subacute respiratory conditions due to chemicals, gases, fumes and vapours | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| [X]Other respiratory conditions due to chemicals, gases, fumes and vapours | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| [X]Upper respiratory inflammation due to chemicals, gases, fumes and vapours, not elsewhere classified | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Respiratory conditions due to chemical fumes NOS | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Acute pulmonary edema caused by fumes AND/OR vapors | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier | 3 | 
| Internal tamponade of retina using gas | Using substance | False | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Removal of gas/air from vitreous | Direct substance | False | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| War gas | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Insufflation of fallopian tube using gas | Using substance | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Internal tamponade of retina using gas | Using substance | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Removal of gas/air from vitreous | Direct substance | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Injection of gas/air into vitreous | Direct substance | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Industrial smog | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Pneumoperitoneum - abdomen | Using substance | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Accidental poisoning caused by gaseous substance | Causative agent | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Poisoning caused by vapor | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Accidental poisoning caused by therapeutic gases | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Injection of gas | Direct substance | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Pneumatic vitreolysis | Direct substance | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Injury due to legal intervention by gas | Causative agent | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 2 | 
| Injury due to legal intervention by tear gas | Causative agent | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 2 | 
| Injury due to legal intervention by poisoning by gas | Causative agent | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 2 | 
| Injury due to legal intervention by asphyxiation by gas | Causative agent | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 2 | 
| Self poisoning by gas | Causative agent | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Suicide and selfinflicted poisoning by gases in domestic use | Causative agent | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 2 | 
| Suicide and selfinflicted poisoning by gas distributed by pipeline | Causative agent | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 2 | 
| Suicide and selfinflicted poisoning by liquefied petroleum gas distributed in mobile containers | Causative agent | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 2 | 
| Alkane | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Poisoning caused by gaseous substance | Causative agent | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Blood gas | Is a | True | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Chemical inhalation injury | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| [X]Upper respiratory inflammation due to chemicals, gases, fumes and vapours, not elsewhere classified | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| [X]Other acute and subacute respiratory conditions due to chemicals, gases, fumes and vapours | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| [X]Other respiratory conditions due to chemicals, gases, fumes and vapours | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| [X]Toxic effects of other specified gases, fumes and vapours | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Above cuff vocalisation | Direct substance | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 3 | 
| Other gas, fume or vapour causing toxic effect | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Gases, fumes or vapours causing toxic effect NOS | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Gas/fume NOS - toxic effect | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Other gas, fume and vapour causing toxic effect NOS | Causative agent | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  | 
| Breath sample | Specimen substance | True | Gaseous substance | Inferred relationship | Existential restriction modifier | 1 | 
| Breath sample | Specimen substance | False | Gaseous substance | Inferred relationship | Existential restriction modifier |  |