Regional Hemodynamic Parameter Changes After Spinal Anesthesia

Measurement of Regional Hemodynamic Parameters Before and After Spinal Anesthesia with Doppler USG

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT05332379

Enrollment

Registered

2022-04-18

Start date

2022-04-01

Completion date

2023-07-20

Last updated

2024-12-31

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Spinal Anesthesia Evaluation

Keywords

Spinal anesthesia, Test, Pulsed Wave Doppler, Sympathectomy

Brief summary

Spinal anesthesia is a regional anesthesia method used for surgical procedures generally involving the lower abdominal area, perineum, and lower extremities. Various tests are performed to evaluate the block level after spinal anesthesia, incluyding pinprick test, cold application, and motor examination. These tests are performed to check whether the pain, sympathetic and motor nerve fibers are affected, respectively, after the block; and good communication with the patient is important here. However, it is extremely difficult to evaluate these tests in pediatric, geriatric, mentally retarded or uncooperative patients. Sympathectomy can be used as a criterion to evaluate the success of the block that occurs after the spinal anesthesia procedure. Sympathetic nerve fibers are the first to be affected by the block, and the success of the block can be evaluated with the revealed sympathectomy. Sympathectomy in the lower extremities after spinal block increases arterial blood flow. This increase in blood flow can be detected by the Pulsed Wave Doppler feature of USG.

Interventions

DIAGNOSTIC_TESTPulsed Wave Doppler USG examination

Pulsed Wave Doppler USG examination of the posterior tibial artery on the left or right lower extremity will be performed before spinal anesthesia, at the 5th and 10th minutes after the spinal anesthesia. Blood flow velocities and vessel diameters will be measured.

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 65 Years

Healthy volunteers

Inclusion criteria

* Elective surgery under spinal anesthesia * American Society of Anesthesiologists (ASA) I-II physical status

Exclusion criteria

* Contraindication for spinal anesthesia * ASA physical status \>II * Vasoactive drug usage

Design outcomes

Primary

Measure	Time frame	Description
Arterial velocity changes	At the 5th and 10th minutes after the spinal anesthesia procedure	Posterior tibial artery velocities (peak systolic, end-diastolic) and vessel diameters will be measured after the spinal anesthesia procedure.

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026