Intrathecal injection (procedure)

• Injection of agent into spinal canal
• Injection of spinal canal
• Intrathecal injection

• Injection into body site (procedure) and Role group (attribute) some (
      Method (attribute) some Injection - action (qualifier value) and
      Direct substance (attribute) some Substance (substance) and
      Procedure site - Indirect (attribute) some Subarachnoid space structure (body structure))

• Injection of substance (procedure)
• Procedure on central nervous system (procedure)
• Injection into body site (procedure)
• Procedure on organ (procedure)
• Introduction of substance by body site (procedure)