ColicMesenteric ArteriesIleal DiseasesMesenteric Artery, SuperiorRenal ColicIntussusceptionMesenteric Artery, InferiorArteriesVeinsCecal DiseasesStrongyloideaAnastomosis, SurgicalColectomyColonic DiseasesIleitisIleumCrohn DiseaseMesenteric Vascular OcclusionSaphenous VeinCeliac ArterySuperior Mesenteric Artery SyndromePortal VeinMesenteric VeinsPulmonary ArteryLaparoscopyRenal ArteryFecal ImpactionTreatment OutcomeMuscle, Smooth, VascularCerebral ArteriesFemoral ArteryVasodilationCarotid ArteriesVaricose VeinsVasoconstrictionHorse DiseasesSplanchnic CirculationColonFemoral VeinBasilar ArteryPulmonary VeinsRecurrenceVasoconstrictor AgentsBiological FactorsJugular VeinsVasodilator AgentsEndothelium, VascularRenal VeinsIliac ArteryUreteral DiseasesSplenic ArteryTomography, X-Ray ComputedHepatic ArteryNorepinephrineSimethiconeVertebral ArteryCoronary Artery BypassMammary ArteriesRadial ArteryRats, WistarPhenylephrineSubclavian ArteryTime FactorsMyographyAcetylcholineAngiographyStomatognathic DiseasesEquidaeVena Cava, SuperiorCarotid Artery, InternalRats, Sprague-DawleyDuodenostomyIliac VeinHorsesMuscle ContractionBlood PressureDose-Response Relationship, DrugUmbilical VeinsHepatic VeinsMuscle RelaxationRats, Inbred WKYCoronary VesselsCarotid Artery DiseasesNitric OxideBrachial ArteryAneurysmCarotid Artery, CommonVentricular Function, RightDogsSuperior ColliculiConstriction, PathologicRegional Blood FlowUrolithiasis