| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Local anaesthetic cervical intrathecal block | Procedure site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some |  | 
| Local anaesthetic thoracic intrathecal block | Procedure site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some |  | 
| Local anaesthetic lumbar intrathecal block | Procedure site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Saddle block | Procedure site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Revision of spinal subarachnoid-ureteral shunt | Procedure site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Spinal anesthesia | Procedure site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some |  | 
| Other specified spinal anesthetic | Procedure site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some |  | 
| Spinal anesthetic NOS | Procedure site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some |  | 
| Local anaesthetic cervical intrathecal block | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Local anaesthetic thoracic intrathecal block | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Local anaesthetic lumbar intrathecal block | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 3 | 
| Saddle block | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Spinal anesthesia | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Other specified spinal anesthetic | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Spinal anesthetic NOS | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Entire spinal subarachnoid space (body structure) | Is a | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some |  | 
| Cervical subarachnoid space | Is a | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some |  | 
| Dorsal subarachnoid space | Is a | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some |  | 
| Sacral subarachnoid space | Is a | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some |  | 
| Lumbar subarachnoid space | Is a | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some |  | 
| Creation of thecoperitoneal shunt (procedure) | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 3 | 
| Creation of connection from spinal subarachnoid space (procedure) | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Creation of thecopleural shunt | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Creation of syringosubarachnoid shunt | Procedure site - Indirect (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Renewal of spinal subarachnoid shunt | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Removal of spinal subarachnoid shunt | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Cerebrospinal fluid collection | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 3 | 
| injection intrathécale d'un agent anesthésique local | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Intrathecal injection of radiological dye | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Intrathecal neurolytic injection | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 3 | 
| Intrathecal neurolysis of sacral roots | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 3 | 
| Intradural spinal arachnoid cyst | Finding site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Traumatic spinal subarachnoid hemorrhage | Finding site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| External drainage procedure from spinal subarachnoid space | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Intrathecal confirmation technique | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Injection of anesthetic substance, therapeutic, subarachnoid, differential | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Spinal pleurothecal shunt with valve | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Spinal salpingothecal shunt with valve | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Subarachnoid-peritoneal spinal shunt | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Revision of spinal subarachnoid-peritoneal shunt | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Injection of anesthetic substance, therapeutic, subarachnoid, continuous | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Revision of spinal subarachnoid-ureteral shunt | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Removal of lumbosubarachnoid shunt | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 3 | 
| Injection of anesthetic substance, therapeutic, subdural, differential | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Removal of subarachnoid-peritoneal shunt | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Injection of anesthetic substance, therapeutic, subdural, continuous | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Removal of subarachnoid-ureteral shunt | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Removal of subarachnoid-ureteral shunt | Procedure site | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Injection of anesthetic substance, diagnostic, subarachnoid, continuous (procedure) | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| injection d'une substance destructrice dans le liquide cérébrospinal | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| injection d'une substance thérapeutique dans le liquide cérébrospinal | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Other specified therapeutic spinal puncture | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Therapeutic spinal puncture NOS | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Other specified diagnostic spinal puncture | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Diagnostic spinal puncture NOS | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 3 | 
| Other diagnostic lumbar puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Creation of lumbar subcutaneous shunt (procedure) | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Other specified therapeutic spinal puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Cerebrospinal fluid collection | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Spinal pleurothecal shunt with valve | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 3 | 
| Diagnostic lumbar puncture (procedure) | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Therapeutic spinal puncture NOS | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Other specified diagnostic spinal puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Diagnostic spinal puncture NOS | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Cervical puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Therapeutic spinal puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Lumbar puncture to lower intracranial pressure | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Lumbar puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| External drainage procedure from spinal subarachnoid space | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Removal of subarachnoid-ureteral shunt | Procedure site - Indirect (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Revision of spinal subarachnoid-peritoneal shunt | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Revision of spinal subarachnoid-ureteral shunt | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Spinal pleurothecal shunt with valve | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Lumbar puncture to lower intracranial pressure | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Cerebrospinal fluid collection | Procedure site - Indirect (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Removal of subarachnoid-peritoneal shunt | Procedure site - Indirect (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Renewal of spinal subarachnoid shunt | Procedure site - Indirect (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Therapeutic spinal puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Diagnostic lumbar puncture (procedure) | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Removal of spinal subarachnoid shunt | Procedure site - Indirect (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| injection d'une substance thérapeutique dans le liquide cérébrospinal | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| injection d'une substance destructrice dans le liquide cérébrospinal | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Other diagnostic lumbar puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Other specified diagnostic spinal puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Diagnostic spinal puncture NOS | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Therapeutic spinal puncture NOS | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Other specified therapeutic spinal puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| External drainage procedure from spinal subarachnoid space | Procedure site - Indirect (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Lumbar puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Cervical puncture | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Revision of spinal subarachnoid-peritoneal shunt | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Revision of spinal subarachnoid-ureteral shunt | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Revision of lumbosubarachnoid shunt | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Revision of spinal subarachnoid shunt | Procedure site - Direct (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Revision of spinal subarachnoid-ureteral shunt | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Revision of spinal subarachnoid-peritoneal shunt | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Revision of spinal subarachnoid shunt | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Creation of connection from spinal subarachnoid space (procedure) | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 1 | 
| Creation of lumbar subcutaneous shunt (procedure) | Procedure site - Direct (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Collection of cerebrospinal fluid via ventriculoperitoneal shunt (procedure) | Procedure site - Indirect (attribute) | False | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 | 
| Collection of cerebrospinal fluid via ventriculoperitoneal shunt (procedure) | Procedure site - Indirect (attribute) | True | Structure of spinal subarachnoid space (body structure) | Inferred relationship | Some | 2 |