Pulsation in the blood vessels of the eye has a big impact on the dynamics of the entire eyeball and its individual elements. Blood pulsation in the retina can be recorded by the pupil, whose size is also subject to dynamic changes. The study involved synchronous measurements of pupil size using a high-speed camera, and blood pulsation using a pulse oximeter placed on the ear lobe. In addition, there were no metrologically significant differences in the phase shift between the average brightness of the individual pupil quadrants. Blood pulsation in other ocular tissues can affect the dynamics of the optical properties of the eye. As demonstrated in this paper, it affects the pupil behavior and its parameters to a considerable extent.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/JOSAA.32.001446 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Pulsating blood vessels push fluid into and out of the brains of slumbering mice.
View Article and Find Full Text PDFDynamic EIT technology for real-time non-invasive monitoring of acute pulmonary embolism: a porcine model experiment.
Respir Res
January 2025
Shaanxi Provincial Key Laboratory of Bioelectromagnetic Detection and Intelligent Perception, Department of Biomedical Engineering, Air Force Medical University, Xi'an, 710032, China.
Background: Acute pulmonary embolism represents the third most prevalent cardiovascular pathology, following coronary heart disease and hypertension. Its untreated mortality rate is as high as 20-30%, which represents a significant threat to patient survival. In view of the current lack of real-time monitoring techniques for acute pulmonary embolism, this study primarily investigates the potential of the pulsatility electrical impedance tomography (EIT) technique for the detection and real-time monitoring of acute pulmonary embolism through the collection and imaging of the pulsatile signal of pulmonary blood flow.
View Article and Find Full Text PDF[Changes in the meridian tropism of points and its theoretical perspectives].
Zhongguo Zhen Jiu
January 2025
Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China.
The points of (thoroughfare vessel) recorded in ( ') were shared with those of foot- meridian in (). Since the Song Dynasty, all of these points were gradually reassigned to the foot meridian, in the way of "the points of foot- meridian, and the confluence points of ". The paper presents the evolution of the meridian tropism of these points and analyzes the underlying causative factors.
View Article and Find Full Text PDFThoracic vertebral body erosion due to a perianeurysmal outpouching lesion after thoracic endovascular aortic repair: a case report and literature review.
BMC Musculoskelet Disord
January 2025
Spine Center and Department of Orthopedic Surgery, Inje University Sanggye Paik Hospital, College of Medicine, Inje University, 1342, Dongil-Ro, Seoul, Nowon-Gu, 01757, Republic of Korea.
Background: The safety of endovascular treatment, such as thoracic endovascular aortic repair (TEVAR), for a descending thoracic aortic aneurysm has been well-established, with a reported low postoperative mortality rate but higher incidences of long-term complications such as endo-leakage, device failure, and aneurysm-related death. Based on this, we report the first case of massive thoracic vertebral body erosion due to a perianeurysmal outpouching lesion after TEVAR.
Case Presentation: A 77-year-old female with a history of TEVAR due to descending thoracic aortic arch aneurysm 4 years ago was referred from the cardiovascular clinic to the spine center.
Development of a Microfluidic Viscometer for Non-Newtonian Blood Analog Fluid Analysis.
Bioengineering (Basel)
December 2024
Institute of NanoEngineering and MicroSystems, National Tsing Hua University, Hsinchu City 300, Taiwan.
The incidence of stroke is on the rise globally. This affects one in every four individuals each year, underscoring the urgent need for early warning and prevention systems. The existing research highlights the significance of monitoring blood viscosity in stroke risk evaluations.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!