[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100556883":3},{"organization":4,"outcomesModule":7,"designInfo":25,"detailedDescription":24,"studyPopulation":28,"armGroups":29,"interventions":34,"overallOfficials":39,"centralContacts":43,"locations":48,"responsibleParty":61,"collaborators":24,"id":65,"slug":24,"hasResults":66,"nctId":67,"briefTitle":68,"officialTitle":69,"acronym":24,"eligibilityCriteria":70,"healthyVolunteers":66,"sex":71,"minAge":72,"maxAge":73,"enrollmentInfo":74,"targetDuration":24,"studyType":77,"phases":24,"briefSummary":78,"conditions":79,"keywords":81,"overallStatus":85,"whyStopped":24,"lastUpdateSubmitDate":86,"lastUpdatePostDateStruct":87,"startDateStruct":90,"completionDateStruct":92,"leadSponsor":94,"locationsCount":95},{"fullName":5,"class":6},"Yangzhou University","OTHER",{"primaryOutcomes":8,"secondaryOutcomes":19,"otherOutcomes":24},[9,13,15],{"measure":10,"description":11,"timeFrame":12},"Changes in the level of Mean Arterial Pressure","The outcome above should be measured at the time before induction, 1 min after induction, 2 min after induction, 3 min after induction, 4 min after induction, 5 min after induction,10 min after induction","Baseline (before induction), 10 min after induction",{"measure":14,"description":11,"timeFrame":12},"Changes in the level of Systolic Blood Pressure",{"measure":16,"description":17,"timeFrame":18},"Multidimensional ultrasound of the inferior vena cava","The outcome above should be measured at the time before induction","Baseline (before induction)",[20,22],{"measure":21,"description":11,"timeFrame":12},"Changes in the level of Heart Rate",{"measure":23,"description":11,"timeFrame":12},"Changes in the level of Diastolic Blood Pressure",null,{"allocation":24,"interventionModel":24,"interventionModelDescription":24,"primaryPurpose":24,"observationalModel":26,"timePerspective":27,"maskingInfo":24},"COHORT","PROSPECTIVE","Elderly patients undergoing elective non-cardiac surgery under general anesthesia",[30],{"label":31,"type":24,"description":24,"interventionNames":32},"Elderly patients undergoing elective noncardiac surgery under general anesthesia",[33],"Diagnostic Test: Multidimensional ultrasound of the inferior vena cava",[35],{"type":36,"name":16,"description":37,"armGroupLabels":38,"otherNames":24},"DIAGNOSTIC_TEST","Cross-sectional parameters of the inferior vena cava include two-dimensional longitudinal diameter, cross-sectional length and short diameter, circumference, and cross-sectional area, as well as cross-sectional length and short diameter, circumference, and cross-sectional area in three-dimensional imaging",[31],[40],{"name":41,"affiliation":5,"role":42},"zhuan zhang, professor","PRINCIPAL_INVESTIGATOR",[44],{"name":41,"role":45,"phone":46,"phoneExt":24,"email":47},"CONTACT","+8615062791355","zhangzhuancg@163.com",[49],{"facility":50,"status":24,"city":51,"state":52,"zip":24,"country":53,"countryCode":54,"cosmosGeoPoint":55,"geoPoint":60,"contacts":24},"the Affiliated Hospital of Yangzhou University, Yangzhou University","Yangzhou","Jiangsu","China","CN",{"type":56,"coordinates":57},"Point",[58,59],119.43583,32.39722,{"lat":59,"lon":58},{"type":62,"investigatorFullName":63,"investigatorTitle":64,"investigatorAffiliation":5,"oldNameTitle":24,"oldOrganization":24},"SPONSOR_INVESTIGATOR","Zhuan Zhang","Doctor","100556883",false,"NCT06530901","Ultrasound of the Inferior Vena Cava in the Prevention of Hypotension After Induction of General Anesthesia","Multidimensional Ultrasound of the Inferior Vena Cava in the Prevention of Hypotension After Induction of General Anesthesia","Inclusion Criteria:\n\n* Elderly patients undergoing elective non-cardiac surgery under general anesthesia;\n* Age 65-85 years old;\n* Body mass index (BMI) 18-28 kg\u002Fm2;\n* American society of anesthesiologists (ASA) class I-III.\n\nExclusion Criteria:\n\n* Patient refusal or lack of cooperation;\n* Inability to communicate properly;\n* Severe sinus bradycardia, pacemaker implantation, atrioventricular block, and atrial fibrillation;\n* Presence of severe hepatic and renal function abnormalities;\n* Preoperative cardiac ultrasound suggesting LVEF \\\u003C50%;\n* Tricuspid valve displacement \\\u003C16 mm by preoperative cardiac ultrasound;\n* Chronic obstructive pulmonary disease;\n* Pulmonary hypertension;\n* Administration of drugs that inhibit the renin-angiotensin-aldosterone system;\n* Possibility of a difficult airway.","ALL","65 Years","85 Years",{"count":75,"type":76},100,"ESTIMATED","OBSERVATIONAL","Based on the preoperative ultrasound detection of various parametric indicators of the inferior vena cava cross-section, including the ratio of the inferior vena cava's long and short axes, cross-sectional area and circumference during two-dimensional and three-dimensional imaging, as well as the changes in respiratory variability of each parameter, we explored the predictive value of IVC ultrasound indicator parameters on hypotension after induction of general anesthesia in elderly patients undergoing elective non-cardiac surgery, screened the sensitive indicators, and calculated the cut-off values.",[80],"Elderly Patients Undergoing Elective Non-cardiac Surgery",[82,83,84],"hypotension","general anesthesia","inferior vena cava","NOT_YET_RECRUITING","2024-08-01",{"date":88,"type":89},"2024-08-05","ACTUAL",{"date":91,"type":76},"2024-09-01",{"date":93,"type":76},"2025-03-31",{"name":63,"class":6},1]