Ultrasound of the Inferior Vena Cava in the Prevention of Hypotension After Induction of General Anesthesia

Zhuan Zhang

Status: Not yet enrolling

Conditions: Elderly Patients Undergoing Elective Non-cardiac Surgery

Treatments: Diagnostic Test: Multidimensional ultrasound of the inferior vena cava

Study type: Observational

Funder types: Other

Identifiers

NCT06530901

20240725

Details and patient eligibility

About

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.

Enrollment: 100 estimated patients

Sex: All

Ages: 65 to 85 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Elderly patients undergoing elective non-cardiac surgery under general anesthesia;
• Age 65-85 years old;
• Body mass index (BMI) 18-28 kg/m2;
• American society of anesthesiologists (ASA) class I-III.

Exclusion criteria

• Patient refusal or lack of cooperation;
• Inability to communicate properly;
• Severe sinus bradycardia, pacemaker implantation, atrioventricular block, and atrial fibrillation;
• Presence of severe hepatic and renal function abnormalities;
• Preoperative cardiac ultrasound suggesting LVEF <50%;
• Tricuspid valve displacement <16 mm by preoperative cardiac ultrasound;
• Chronic obstructive pulmonary disease;
• Pulmonary hypertension;
• Administration of drugs that inhibit the renin-angiotensin-aldosterone system;
• Possibility of a difficult airway.

Trial design

100 participants in 1 patient group

Elderly patients undergoing elective noncardiac surgery under general anesthesia

Treatment:

Diagnostic Test: Multidimensional ultrasound of the inferior vena cava