{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.vein","code":"thing-q9609","url":"https://ver.cy/models/thing/q9609/","name":"vein","alternateNames":["perforating vein","intercapitular veins of foot","lateral vein of right lung","medial vein of right lung","posterior cardinal vein","portal venous system","arcuate vein","saphenous vein","vena cava","gonadal vein","deep vein","vena comitans"],"kind":"thing","status":"published","version":"0.2.0-wave.3","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.OBJ"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A blood vessel that carries blood toward the heart, in most cases deoxygenated blood from tissues, with thinner walls and lower pressure than arteries and valves in many limb veins to prevent backflow; veins form systemic and pulmonary networks, include superficial, deep and perforating veins and special systems such as the hepatic portal system, and are the site of conditions such as varicose veins and thrombosis.","purpose":"Let an agent explain veins and their structure and function, identify kinds and major venous systems, relay clinical conditions in general terms, and distinguish veins from arteries and lymphatics.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Toward the heart","Low pressure and thin walls","Valves in many veins","Capacitance function"],"structure":{"bundles":[{"id":"anatomy","name":"Anatomy","description":"Structure and function.","layers":[{"id":"structure","name":"Structure","description":"Structure.","findings":[{"id":"structure-finding","name":"Structure","description":"Structure.","questions":[{"text":"How are veins built, and how do they differ from arteries?","kind":"definition"},{"text":"Is the vessel a vein, an artery or a lymphatic?","kind":"boundary"}]}]},{"id":"systems","name":"Systems","description":"Venous systems.","findings":[{"id":"systems-finding","name":"Systems","description":"Systems.","questions":[{"text":"What are the major venous systems, including the portal system and pulmonary veins?","kind":"definition"},{"text":"Which entry fits the specific vein or system?","kind":"action"}]}]}]},{"id":"function","name":"Function","description":"Physiology.","layers":[{"id":"return","name":"Return","description":"Venous return.","findings":[{"id":"return-finding","name":"Return","description":"Return.","questions":[{"text":"How do valves, muscle pumps and pressure drive venous return?","kind":"provenance"},{"text":"Which entry fits venous return?","kind":"action"}]}]},{"id":"capacitance","name":"Capacitance","description":"Capacitance.","findings":[{"id":"capacitance-finding","name":"Capacitance","description":"Capacitance.","questions":[{"text":"Why do veins hold most of the blood volume, and how does that matter in circulation?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]}]},{"id":"clinical","name":"Clinical","description":"Conditions and procedures.","layers":[{"id":"conditions","name":"Conditions","description":"Conditions.","findings":[{"id":"conditions-finding","name":"Conditions","description":"Conditions.","questions":[{"text":"What conditions affect veins, from varicose veins to thrombosis, in general terms?","kind":"provenance"},{"text":"Is the user describing leg swelling or pain, which needs a clinician?","kind":"boundary"}]}]},{"id":"procedures","name":"Procedures","description":"Access and procedures.","findings":[{"id":"procedures-finding","name":"Procedures","description":"Procedures.","questions":[{"text":"How are veins used for blood draws, infusions and procedures?","kind":"provenance"},{"text":"Which entry fits venous access?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"Development and history.","layers":[{"id":"development","name":"Development","description":"Development.","findings":[{"id":"development-finding","name":"Development","description":"Development.","questions":[{"text":"How do veins develop in the embryo, including the cardinal veins?","kind":"provenance"},{"text":"Which entry fits embryology?","kind":"action"}]}]},{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How was the venous circulation understood, from Galen to Harvey?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Explain veins and venous circulation in general terms with medical sources.","Urge people with signs of deep vein thrombosis or embolism to seek urgent care."],"mustNot":["Diagnose venous conditions in a specific person.","Advise on injecting into veins outside clinical care.","Recommend stopping anticoagulants or other prescribed medicines.","Promote unproven treatments for varicose veins."],"requiresHuman":["Treatment decisions for venous disease.","Any procedure that accesses veins."]},"ethics":{"considerations":["Clots in veins can kill when they move to the lungs; delay matters.","Medical advice must respect each patient's situation."],"affectedParties":["Patients","Clinicians"]},"owners":{"steward":"The patient's treating clinician; records belong in the patient's health record.","roles":[],"masterSystems":["Patient health records"]},"relations":[{"target":"Q112826975","type":"parent","note":"registry parent class"},{"target":"Q66592151","type":"parent","note":"registry parent class"},{"target":"Q988343","type":"parent","note":"registry parent class"},{"target":"blood vessel","type":"related","note":"in registry terms"},{"target":"segment of venous tree","type":"related","note":"in registry terms"},{"target":"artery","type":"related","note":"carrying blood away from the heart"},{"target":"heart","type":"related","note":"the pump"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.vein","Wikidata: Q9609 (https://www.wikidata.org/wiki/Q9609)","TA2: veins Terminologia Anatomica","MeSH: D014680 veins"]},"properties":{"applicability":"required","items":["share of blood volume: about 60-70 percent - held in veins"]},"recognition":{"applicability":"required","items":["Vessel carrying blood toward the heart","Superficial, deep, perforating and portal veins","Arteries carry blood away from the heart; lymphatics carry lymph","Blue-appearing vessels visible under the skin; thin-walled vessels in anatomy."]},"capabilities":{"applicability":"required","items":["explain structure and function","identify kinds and systems","relay clinical conditions in general terms","distinguish from arteries and lymphatics"]},"hazards":{"applicability":"required","items":["Deep vein thrombosis and embolism","Varicose veins and venous insufficiency","Agents giving personal medical advice"]},"interfaces":{"applicability":"required","items":["Clinical guidelines on venous disease and thrombosis","Standards for venous access and phlebotomy"]},"context":{"applicability":"required","items":["Returning blood to the heart.","superficial and deep veins of the limbs","perforating veins","pulmonary veins carrying oxygenated blood","the hepatic portal venous system","embryonic veins such as the posterior cardinal veins","named veins such as the intercapitular veins of the foot"]}},"sources":[{"title":"Wikidata item Q9609: vein","url":"https://www.wikidata.org/wiki/Q9609","note":"identity and sense of the item"},{"title":"Wikipedia: Vein","url":"https://en.wikipedia.org/wiki/Vein","note":"general description of the item"}],"openQuestions":["Should the portal system and pulmonary veins be separate entries?","How should clinical guidelines be linked?","The registry entry has merged aliases naming specific veins and systems; should they be split off?"],"resources":{"spec":"/models/things/publications/thing-q9609/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q9609/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T00:04:25Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-06T19:52:03+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}