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Photoplethysmographic Dichrotic Notch Reflexes Systemic Hemodynamics

NCT ID: NCT04179097

Last Updated: 2024-09-19

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

TERMINATED

Total Enrollment

15 participants

Study Classification

OBSERVATIONAL

Study Start Date

2019-11-05

Study Completion Date

2024-08-10

Brief Summary

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Changes in the vascular tone of anesthetized patients is common and cause hemodynamic problems. The investigators have previously demonstrated that the shape of the pulse oximetry waveform (photoplethysmography) is closely related to the changes observed in systemic vascular resistence. The main change in pulse waveform is based to the dichrotic notch position. The present study was designed to determine if the dichrotic notch position is related to a local or a systemic change in the vascular tone.

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Detailed Description

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This is a prospective and observational study designed to determine if the changes observed in finger photoplethysmographic waveform of surgical patients is related to a local or a sistemic changes in the vascular tone. The investigators will studied 15 patients undergoing regional brachial plexus anesthesia for upper limb surgeries. Photoplethysmography will be continuously recorded in the thumb of the tested hand (anesthetized hand) and in the thumb of the control, opposite hand. Duplex color and power Doppler will measure flow in the both brachial arteries and in the aorta (supraesternal view). The contour analysis of both, photoplethysmogram and arterial flow velocities will be analyzed, correlated and compared.

Conditions

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Vascular Diseases

Study Design

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Observational Model Type

CASE_ONLY

Study Time Perspective

PROSPECTIVE

Interventions

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Finger photoplethysmography

Bilateral finger photoplethysmogray, bilateral brachial artery Doppler, Aorta artery Doppler

Intervention Type DIAGNOSTIC_TEST

Other Intervention Names

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Brachial and aorta Doppler

Eligibility Criteria

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Inclusion Criteria

* Written Inform Consent
* Programmed surgery
* Supine position

Exclusion Criteria

* Emergency surgery
* Peripheral vascular diseases
Minimum Eligible Age

20 Years

Maximum Eligible Age

60 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Hospital Privado de Comunidad de Mar del Plata

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Gerardo Tusman, MD

Role: PRINCIPAL_INVESTIGATOR

Hospital Privado de Comunidad

Locations

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Cecilia M. Acosta

Mar del Plata, Buenos Aires, Argentina

Site Status

Hospital Privado de Comunidad

Mar del Plata, Buenos Aires, Argentina

Site Status

Countries

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Argentina

Other Identifiers

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2919/1942/2019

Identifier Type: -

Identifier Source: org_study_id

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