PressureGelsPainBlood PressureChronic PainPain ManagementHydrostatic PressurePain ThresholdPain, PostoperativeLow Back PainBack PainPain MeasurementBlood Pressure DeterminationAbdominal PainNeck PainPain, IntractablePain PerceptionPelvic PainFacial PainHypertensionTransducers, PressureIntracranial PressureAcute PainIntraocular PressurePain, ReferredBlood Pressure Monitoring, AmbulatoryAtmospheric PressureAir PressureVenous PressureShoulder PainMusculoskeletal PainHeart RateArterial PressureVentricular PressureElectrophoresis, Gel, Two-DimensionalTime FactorsHemodynamicsAnalgesicsCentral Venous PressurePulmonary Wedge PressureAntihypertensive AgentsTreatment OutcomeNociceptive PainElectrophoresis, Gel, Pulsed-FieldChronic DiseaseNeuralgiaProspective StudiesOsmotic PressureSystoleVascular ResistanceAnalgesics, OpioidElectrophoresis, Agar GelDogsManometryDouble-Blind MethodHyperalgesiaPulseFollow-Up StudiesRats, Sprague-DawleyMyofascial Pain SyndromesDiastoleAnalysis of VarianceComplex Regional Pain SyndromesCerebrospinal Fluid PressureVisceral PainPositive-Pressure RespirationQuestionnairesContinuous Positive Airway PressureArthralgiaRegional Blood FlowCardiac OutputAnalgesiaMolecular Sequence DataHypotensionSeverity of Illness IndexPortal PressureDisease Models, AnimalPostureDose-Response Relationship, DrugReproducibility of ResultsKidneyLabor PainSympathetic Nervous SystemCross-Sectional StudiesAnesthetics, LocalBlood Flow VelocityRetrospective StudiesReninNociceptorsPressoreceptorsRats, Inbred SHROxygenHot TemperatureReference ValuesLower Body Negative PressureRegression AnalysisRespirationRabbitsCohort StudiesAge Factors