Efficacy of Subclavian Vein/Artery Diameter Index in Predicting the Incidence of the Spinal-Induced Hypotension in Geriatric Patients

Efficacy of Subclavian Vein/Artery Diameter Index in Predicting the Incidence of the Spinal-Induced Hypotension in Geriatric Patients: A Prospective, Observational Study.

The hypothesis of the study will be that the subclavian vein/subclavian artery diameter (SCVD/SCAD) index will be a good predictor of spinal-induced hypotension in geriatric patients.

Study Overview

• Status: Not yet recruiting
• Conditions: Old Age; Debility; Spinal Induced Hypotension
• Intervention / Treatment: Diagnostic test: Assessment of the SCV & SCA; Diagnostic test: Assessment of the IVC and aorta

Detailed Description

Ultrasonography (USG)-guided measurement of inferior vena cava (IVC) diameters and IVC collapsibility index (IVCCI) are reliable indicators of intravascular volume status and of clinical response to volume resuscitation.

The cava/aorta index had previously shown good ability in assessing volume status and predicting post-spinal hypotension.

The subclavian vein (SCV) is advantageous for measurement as it's supported by the clavicle, preventing deformation or compression. It is also not affected by pregnancy, obesity, or abdominal pain, and its anatomical position remains fixed.

The hypothesis of the study will be that the subclavian vein/subclavian artery diameter (SCVD/SCAD) index will be a good predictor of spinal-induced hypotension in geriatric patients.

• Study Type: Observational
• Enrollment (Estimated): 107

Contacts and Locations

• Study Contact: Name: sameh Ahmed; Email: samehabdelkhalik1982@gmail.com
• Study Contact Backup: Name: tarek AH Mostafa; Phone Number: 01003591332; Email: dr.tarek311@yahoo.com

Study Locations

• Egypt
  • El Gharbyia
    • Tanta, El Gharbyia, Egypt, 31111
      • tarek Abdelhay Mostafa

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Older Adult
• Accepts Healthy Volunteers: No

• Sampling Method: Probability Sample

Study Population

107 geriatric patients, aged 65 or older, scheduled for elective surgery under spinal anesthesia

Description

Inclusion Criteria:

• 1. Patients aged 65 or older. 2. Lower body surgeries to be done with spinal anesthesia. 3. BMI less than 30 kg/m2. 4. Patients with ASA I-III.

Exclusion Criteria:

- 1. Patient refusal. 2. Patients with a history of peripheral arterial disease or atherosclerosis 3. Patients with a body mass index of greater than 30 kg/m2 4. Major bloody surgeries (class C surgeries) 5. Patients with a history of cardiovascular disorders, including arrhythmias, heart failure, tricuspid or mitral regurgitation, dilated right atrium or ventricle, AF, ejection fraction < 45%, uncontrolled hypertension, systolic blood pressure <90 mmHg, dyspnea, agitation.

6. Patients with increased intra-abdominal pressure, intra-abdominal mass compressing the IVC.

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
subclavian vein to artery index	The index will be calculated as the ratio between the SCV maximum diameter and the SAD diameter.	pre-anesthesia peroid

Collaborators and Investigators

• Sponsor: Tanta University

Study record dates

Study Major Dates

• Study Start (Estimated): January 1, 2026
• Primary Completion (Estimated): June 1, 2026
• Study Completion (Estimated): July 1, 2026

Study Registration Dates

• First Submitted: December 2, 2025
• First Submitted That Met QC Criteria: December 2, 2025
• First Posted (Actual): December 16, 2025

Study Record Updates

• Last Update Posted (Actual): December 16, 2025
• Last Update Submitted That Met QC Criteria: December 2, 2025
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Pathologic Processes; Pathological Conditions, Signs and Symptoms; Frailty
• Other Study ID Numbers: SCV with hypotension

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No