Preliminary evaluation of near-infrared vein visualization technology in the screening of palatal blood vessels

Abstract

BackgroundAvoidance from palatal blood vessel rupture is a major concern during the palatal soft tissue graft surgery. There is no defined chair-side and case-specific palatal blood vessel detection approach to facilitate the harvesting process. The objective of this pilot study is to assess the feasibility of a near-infrared vein visualization system in the screening process of palatal blood vessels.Material and MethodsAn extraoral vein visualization device (AccuVein AV400) was applied to a total of 304 hemi-maxilla of 152 individuals by two blind examiners. The study groups were classified according to their maximum inter-incisal measurements. The distances between the coronal border of the vessel image and the mid-palatal gingival margins of the adjacent teeth were measured and in each group. The correlations among the measurements were evaluated within groups.ResultsThe blood vessel to the adjacent teeth measurements exhibited no statistical difference between both examiners in all subjects (p<0.001). Correlations between the examiners gradually increased in all groups as the mouth opening rates of the subjects were increased (p<0.001).ConclusionsIn the current state, screening of the palatal blood vessels via near-infrared vein visualization technology seems to be not suitable for every individual due to the restrictive effect of mouth opening. However, the promising results of this preliminary study demonstrated increasing consistency between the measurements of the examiners as the inter-incisal distance increase which emphasized the need an intraoral version of the device. Considering the lack of local decision-making technology for the detection of palatal blood vessels, further studies are required for development and optimization of these systems. Key words:Near-infrared vein visualization, palatal graft harvesting, surgical complications.

Smart Blood Vessel Detection System for Laparoscopic Surgery

“…Several approaches have been proposed for detecting blood vessels; their comparison is summarized in Table 1 . The vein visualization device [7] is generally used for screening the skin’s surface. The device emits near-infrared light (wavelength: 785 nm) and receives the light reflected from the skin’s surface.…”

“…To improve the quality of color Doppler images, the needle must be inserted into the human body to vibrate the local tissue. Recently, the near-infrared vein visualization device was developed for real-time visualization of superficial vessels under the skin [6] – [8] ; near-infrared light (wavelength: ~785 nm) is used to penetrate the skin and blood vessels and is partially absorbed at avascular locations but not at vascular locations. Using the difference in absorption between the vascular and avascular locations, the device determines the location of blood vessels.…”

Intelligent Algorithms-Based CT Image Segmentation in Patients with Cardiovascular Diseases and Realization of Visualization Algorithms

“…Medical visualization technology is a three-dimensional model. It can spontaneously perform quantitative and qualitative analysis of the target [16], thus providing clearer images and facilitating functional analysis [17]. Yue (2017) studied the relationship between three-dimensional reconstruction and fluid mechanics with the formation and progression of atherosclerotic plates [18].…”

CBCT as a novel pre-op non-invasive method to determine the location of Greater Palatine Foramen

“…The size of these grafts depends on the position of neurovascular bundle present at or near the donor site 1 . The possibility of haemorrhagic complication limits clinicians from harvesting the optimum sized grafts required for the treatment demands 3 .…”

“…Numerous cadaver and radiological studies have recommended safe distances from the adjacent teeth to greater palatine foramen to guide the clinicians to determine the surgical --------------------------------------------------------------------------------------Received on 19-09-2022 Accepted on 13-02-2023 borders of palatal donor sites while graft harvesting 3 . Few studies evaluate the position and topography of the neurovascular bundle by soft tissue dissection of cadavers 2 .…”