304062003: Structure of intrathoracic blood vessel (body structure)

SNOMED CT Concept\Body structure\Anatomical or acquired body structure (body structure)\Anatomical structure\...

\Structure of anatomical cluster (body structure)\Structure of anatomical compartment (body structure)\Structure of body cavity and/or content\Structure of thoracic cavity and/or content\Intrathoracic cardiovascular structure\Structure of intrathoracic blood vessel

\Body organ structure\Blood vessel structure (body structure)\Regional blood vessel structure (body structure)\Vascular structure of trunk\Structure of blood vessel of thoracic cross-sectional segment of trunk\Structure of intrathoracic blood vessel

\Body system structure\Structure of cardiovascular system (body structure)\...

\Regional cardiovascular structure (body structure)\Regional blood vessel structure (body structure)\Vascular structure of trunk\Structure of blood vessel of thoracic cross-sectional segment of trunk\Structure of intrathoracic blood vessel
\Regional cardiovascular structure (body structure)\Cardiovascular structure of trunk\Vascular structure of trunk\Structure of blood vessel of thoracic cross-sectional segment of trunk\Structure of intrathoracic blood vessel
\Regional cardiovascular structure (body structure)\Cardiovascular structure of trunk\Intrathoracic cardiovascular structure\Structure of intrathoracic blood vessel

\Blood vessel structure (body structure)\Regional blood vessel structure (body structure)\Vascular structure of trunk\Structure of blood vessel of thoracic cross-sectional segment of trunk\Structure of intrathoracic blood vessel

\Body tissue structure\Structure of soft tissue (body structure)\Structure of lymphatic vessel and/or blood vessel (body structure)\Blood vessel structure (body structure)\Regional blood vessel structure (body structure)\Vascular structure of trunk\Structure of blood vessel of thoracic cross-sectional segment of trunk\Structure of intrathoracic blood vessel

\Body region structure\Chest and/or abdomen and/or pelvis structure (body structure)\Chest and abdomen\Thoracic structure\Structure of thoracic cavity and/or content\Intrathoracic cardiovascular structure\Structure of intrathoracic blood vessel
\Body region structure\Structure of neck and/or chest and/or abdomen and/or pelvis (body structure)\Neck and/or chest and/or abdomen structure (body structure)\Neck and/or chest structure (body structure)\Thoracic structure\Structure of thoracic cavity and/or content\Intrathoracic cardiovascular structure\Structure of intrathoracic blood vessel
\Body region structure\Structure of neck and/or chest and/or abdomen and/or pelvis (body structure)\Neck and/or chest and/or abdomen structure (body structure)\Chest and abdomen\Thoracic structure\Structure of thoracic cavity and/or content\Intrathoracic cardiovascular structure\Structure of intrathoracic blood vessel
\Body region structure\Regional blood vessel structure (body structure)\Vascular structure of trunk\Structure of blood vessel of thoracic cross-sectional segment of trunk\Structure of intrathoracic blood vessel
\Body region structure\Body part structure\Upper body structure\Upper body part structure\This segment relates to the volume of the trunk that is bounded by and includes: superiorly the thoracic inlet; inferiorly the thoracic diaphragm; posteriorly the spinal column and back of the thorax; and laterally the chest wall: it contains the thoracic cavity and contents, and includes all the overlying muscles, skin and subcutaneous tissue.\Thoracic structure\Structure of thoracic cavity and/or content\Intrathoracic cardiovascular structure\Structure of intrathoracic blood vessel
\Body region structure\Body part structure\Trunk structure\Structure of subregion of trunk\Structure of thoracic cross-sectional segment of trunk (body structure)\Structure of blood vessel of thoracic cross-sectional segment of trunk\Structure of intrathoracic blood vessel
\Body region structure\Body part structure\Trunk structure\Structure of subregion of trunk\Structure of thoracic cross-sectional segment of trunk (body structure)\This segment relates to the volume of the trunk that is bounded by and includes: superiorly the thoracic inlet; inferiorly the thoracic diaphragm; posteriorly the spinal column and back of the thorax; and laterally the chest wall: it contains the thoracic cavity and contents, and includes all the overlying muscles, skin and subcutaneous tissue.\Thoracic structure\Structure of thoracic cavity and/or content\Intrathoracic cardiovascular structure\Structure of intrathoracic blood vessel
\Body region structure\Body part structure\Trunk structure\Cardiovascular structure of trunk\Vascular structure of trunk\Structure of blood vessel of thoracic cross-sectional segment of trunk\Structure of intrathoracic blood vessel
\Body region structure\Body part structure\Trunk structure\Cardiovascular structure of trunk\Intrathoracic cardiovascular structure\Structure of intrathoracic blood vessel
\Body region structure\Body part structure\Trunk structure\Structure of body cavity and/or content\Structure of thoracic cavity and/or content\Intrathoracic cardiovascular structure\Structure of intrathoracic blood vessel

Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2002. Module: SNOMED CT core

Descriptions:

Expanded Value Set

Outbound Relationships	Type	Target	Active	Characteristic	Refinability	Group	Values
Structure of intrathoracic blood vessel	Is a	Intrathoracic cardiovascular structure	false	Inferred relationship	Existential restriction modifier (core metadata concept)
Structure of intrathoracic blood vessel	Is a	Vascular structure of trunk	false	Inferred relationship	Existential restriction modifier (core metadata concept)
Structure of intrathoracic blood vessel	partie de	Entire cardiovascular system	false	Additional relationship (core metadata concept)	Existential restriction modifier (core metadata concept)
Structure of intrathoracic blood vessel	partie de	Entire thorax (body structure)	false	Additional relationship (core metadata concept)	Existential restriction modifier (core metadata concept)
Structure of intrathoracic blood vessel	Is a	Intrathoracic cardiovascular structure	true	Inferred relationship	Existential restriction modifier (core metadata concept)
Structure of intrathoracic blood vessel	Is a	Structure of blood vessel of thoracic cross-sectional segment of trunk	true	Inferred relationship	Existential restriction modifier (core metadata concept)

Inbound Relationships	Type	Active	Source	Characteristic	Refinability	Group
Intrathoracic systemic artery	Is a	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Intrathoracic systemic vein	Is a	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Great vessel of thorax	Is a	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Structure of superior thoracic artery	Is a	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Structure of superior intercostal artery	Is a	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Structure of ductus arteriosus	Is a	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Intrathoracic arterial structure	Is a	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Superior vena cavogram	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	3
Unifocalization operation to an artery (procedure)	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Thoracic aortogram	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Angiography of bronchial artery	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Chest angiography	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Creation of intrathoracic vascular shunt or bypass	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Thoracic aortography, positive contrast	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Creation of conduit between left ventricle and aorta	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Angiography of bilateral pulmonary arteries (procedure)	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Unilateral imaging of pulmonary artery	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Intrathoracic phlebography	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	3
Venography of superior vena cava with serialography	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Angiography of pulmonary arteries	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Thoracic aortography with serialography	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Transsternal thoracic venogram	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Cineradiography of great blood vessel (procedure)	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Kymography - great vessels	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
US great vessel scan	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury to thoracic blood vessel	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Multiple thoracic blood vessel injury	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Angiography of intercostal artery	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Other thoracic blood vessel injury	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Other thoracic blood vessel injury NOS	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Thoracic blood vessel injury NOS	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
[X]Injury of other blood vessels of thorax	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Neoplasm of blood vessel of thorax	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of intercostal artery	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Injury of pulmonary vessels	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of subclavian artery	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of intercostal vein	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of thoracic aorta	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Injury of blood vessels of thorax	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of hemiazygos vein (disorder)	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of innominate artery	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Injury of internal mammary vein	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of subclavian vein	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of multiple blood vessels of thorax (disorder)	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Closed injury of subclavian artery (disorder)	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Open injury, subclavian artery	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Closed injury of subclavian vein (disorder)	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Open injury, subclavian vein	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Pulmonary blood vessel injury	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Thoracic angiography	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Pulmonary vessel injury, unspecified	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Pulmonary vessel injury NOS	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Thoracic angiography NOS	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Disorder of blood vessels of thorax (disorder)	Finding site	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Angiography of intrathoracic vessels (procedure)	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Intrathoracic cardiovascular structure	Is a	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Construction of conduit - apex of left ventricle to descending aorta	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Construction of conduit - left ventricle to ascending aorta	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Construction of intraventricular left ventricle to aorta tunnel (procedure)	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	3
Construction of intraventricular left ventricle to aorta spiral tunnel	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Arch aortogram	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Aortic root arteriogram	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	3
Creation of conduit between left ventricle and aorta	Procedure site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Vascular thoracic outlet syndrome (disorder)	Finding site	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Structure of pulmonary blood vessel (body structure)	Is a	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)
Arterial thoracic outlet syndrome due to cervical rib	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	4
Angiography of intrathoracic vessels (procedure)	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Construction of intraventricular left ventricle to aorta tunnel (procedure)	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	5
Construction of intraventricular left ventricle to aorta spiral tunnel	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	5
Thoracic aortogram	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Arch aortogram	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Aortic root arteriogram	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Chest angiography	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Rastelli operation in repair of transposition of great vessels (procedure)	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	5
Pulmonary bypass operation	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	3
Creation of intrathoracic vascular shunt or bypass	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Creation of conduit between right ventricle and pulmonary artery (procedure)	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Thoracic aortography, positive contrast	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Creation of conduit between left ventricle and aorta	Procedure site - Direct (attribute)	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	4
Creation of conduit of right ventricle and pulmonary artery in repair of pulmonary artery atresia	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	4
Creation of conduit of right ventricle and pulmonary artery in repair of transposition of great vessels (procedure)	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	3
Formation of conduit of right ventricle and pulmonary artery in repair of pulmonary artery atresia in truncus arteriosus (procedure)	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	7
Thoracic aortography with serialography	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Cineradiography of great blood vessel (procedure)	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Kymography - great vessels	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Angiography of intercostal artery	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Thoracic angiography NOS	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Multiple thoracic blood vessel injury	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Kymography - great vessels	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Chest angiography	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of blood vessels of thorax	Finding site	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
[X]Injury of other blood vessels of thorax	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Creation of intrathoracic vascular shunt or bypass	Procedure site - Direct (attribute)	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of multiple blood vessels of thorax (disorder)	Finding site	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Injury of intercostal vein	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Other thoracic blood vessel injury	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Thoracic blood vessel injury NOS	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Other thoracic blood vessel injury NOS	Finding site	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Thoracic angiography NOS	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Angiography of intrathoracic vessels (procedure)	Procedure site - Direct (attribute)	True	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Cineradiography of great blood vessel (procedure)	Procedure site - Direct (attribute)	False	Structure of intrathoracic blood vessel	Inferred relationship	Existential restriction modifier (core metadata concept)	1

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Reference Sets

Anatomy structure and entire association reference set (foundation metadata concept)

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Id	Description	Lang	Type	Status	Case?	Module
446328013	Intrathoracic vascular structure	en	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
3464616010	Structure of intrathoracic blood vessel (body structure)	en	Fully specified name	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
3464617018	Structure of intrathoracic blood vessel	en	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
446328013	Intrathoracic vascular structure	en	Synonym (core metadata concept)	Active	Only initial character case insensitive (core metadata concept)	SNOMED CT core
446328013	Intrathoracic vascular structure	en	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
700321018	Intrathoracic vascular structure (body structure)	en	Fully specified name	Active	Only initial character case insensitive (core metadata concept)	SNOMED CT core
3464616010	Structure of intrathoracic blood vessel (body structure)	en	Fully specified name	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
3464617018	Structure of intrathoracic blood vessel	en	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
1524541000172116	vaisseau sanguin intrathoracique	fr	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT Switzerland NRC maintained Module
1524541000172116	vaisseau sanguin intrathoracique	fr	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT Switzerland NRC maintained Module