Hypothermia, InducedHypothermiaAnalgesiaAnalgesia, EpiduralAnalgesia, ObstetricalAnalgesia, Patient-ControlledRewarmingBody TemperatureAnalgesics, OpioidPain, PostoperativeMorphinePain MeasurementBupivacaineAnesthetics, LocalFentanylAcupuncture AnalgesiaAnalgesicsHypoxia-Ischemia, BrainMeperidineAnesthesia, EpiduralHeart ArrestLabor PainSufentanilPainBody Temperature RegulationInjections, SpinalNerve BlockLabor, ObstetricCirculatory Arrest, Deep Hypothermia InducedAnesthesia, ObstetricalAnesthesia, SpinalAmidesAnalgesics, Non-NarcoticDouble-Blind MethodTramadolAnesthesia, GeneralShiveringNaloxoneAsphyxia NeonatorumDrug ToleranceCardiopulmonary ResuscitationTime FactorsCesarean SectionPostoperative Nausea and VomitingPain ThresholdInterpleural AnalgesiaHypnotics and SedativesCold TemperatureReceptors, Opioid, muRats, Sprague-DawleyComaTreatment OutcomeClonidineKetamineConscious SedationKetorolacLabor Stage, FirstHydromorphoneLidocainePain ManagementAnesthesia, CaudalProspective StudiesDose-Response Relationship, DrugHeart Arrest, InducedAnesthesia and AnalgesiaPregnancyAdjuvants, AnesthesiaAnesthesia, ConductionFemoral NerveBrainBrain InjuriesReceptors, OpioidNitrous OxideAnesthesiaPirinitramideThoracotomyButorphanolAlfentanilPiperidinesNalbuphineNarcotic AntagonistsAnesthetics, CombinedBrain IschemiaOut-of-Hospital Cardiac ArrestHeatingOpioid PeptidesCardiopulmonary BypassHypoxia, BrainInjections, IntraventricularElectroacupunctureIntraoperative CareMepivacaineInfant, NewbornPostoperative CarePruritusExtracorporeal CirculationKetoprofenNefopamResuscitationDisease Models, Animal