Influence of Daily Activities on Retinal Microcirculation

Not Applicable

Completed

• Conditions: Retinal Microcirculation Disorder
• Interventions: Behavioral: Body motion; Behavioral: Beverage consumption; Behavioral: Daily reading

• Registration Number: NCT03416088
• Lead Sponsor: Jiannan Huang

Brief Summary

The daily behaviors such as drinking coffee, wine, reading, exercise and body postural changes may have influence on the function or morphology of the retinal microcirculation in healthy people.A recent study found that the fingertips microvascular bed constricted obviously after the intake of a cup of coffee with caffeine, it significantly reduced blood flow to the fingers; Long reading of electronic products can induce significant dry eye symptoms, affect visual quality, and cause asthenopia. Microcirculation is critical for regulating vascular resistance and blood flow in organs. Fundus blood vessels is the only visible microvascular in vivo, its morphology and function changes not only associated with eye disease, but also with cardiovascular and cerebrovascular diseases. Optical coherence tomography angiography (OCTA) is a new technique which could acquire blood flow information in a non-invasive way without the use of dye. Magnetic resonance imaging (MRI) can quantitatively evaluation of cerebral blood flow and retina-choroid blood flow using the noninvasive arterial spin labeling technique in a large field of view (FOV) without depth limitations.The study tried to detect the influence of daily behaviors such as drinking coffee, red wine, reading , exercise, etc. on the retinal microcirculation with OCTA and MRI, and provide reference for health behaviors.

Detailed Description

Not available

Study Timeline

• Study Start: 2017-05-01
• Study First Submitted: 2018-01-17
• Study First Submitted QC: 2018-01-23
• Study First Posted: 2018-01-30
• Primary Completion: 2020-10-31
• Study Completion: 2020-12-31
• Status Verified: 2025-04
• Last Update Submitted: 2025-04-13
• Last Update Posted: 2025-04-17

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 54

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Body motion	Body motion	Exercise and body postural changes.
Beverage consumption	Beverage consumption	Drink 300ml red wine (alcohol concentration:12.5%), 300ml coffee (caffeine concentration 72 mg), or 300ml water.
Daily reading	Daily reading	Reading paper books, playing video games with mobile phones, or non-reading.

Primary Outcome Measures

Name	Time	Method
Vessel area density (VAD)	3 weeks	VAD is calculated as a unit-less ratio of the total image area occupied by the vasculature to the total image area in the binary vessel maps.
Cerebral blood flow (CBF)	3 weeks	The frontal lobe was selected as the region of interest (ROI) to measure and average the changes in CBF
Vessel diameter index (VDI)	3 weeks	VDI is calculated using both the vessel area map and the skeletonized vessel map, to yield the averaged vessel caliber.
Flow impairment region (FIR)	3 weeks	FIZ: calculated by summing all 'no-flow' pixels up.
Retina-choroid blood flow	3 weeks	Blood flow for the entire retinal thickness were determined as a function of the distance from the optic nerve head, where the blood flow was measured at the peaks of the projection profiles. An region of interest outlining the posterior retina with a size of 0.7 to 0.8 mm across the retina-choroid thickness in the parafoveal region was used to obtain the blood flow signal time courses and averaged the values.

Trial Locations

Locations (1)

Shanghai Eye Disease Prevention & Treatment Center; 🇨🇳 Shanghai, Shanghai, China