More research on the topic of jugular vein valves in healthy individuals from a presentation at ISNVD 2014
(click on the presentation book pdf here for the source) http://www.isnvdconference.org/program/ ... -book.html
What is the Normal Jugular Vein Valve Function?
Erica Menegatti, M.D. & Ph.D.*, S. Gianesini*,M. Tessari*, ME. Vannini*, F.Sisini°, P. Zamboni*. *Vascular Diseases Center, University of Ferrara, Via Aldo Moro 8, 44124 Cona (FE), Italy Department of Medical Physics, University of Ferrara Italy
Objective: The internal jugular vein (IJV) valve opening and closure mechanism in relation to the posture and respiration is not fully understood so far. Therefore, an accurate ultrasound characterization of the IJV valve physiologic function becomes necessary.
Methods: Eighty-three (83) consecutive healthy volunteers (35 Male, 48 Female, 25.7±6.7 y.o.) underwent to high resolution B and M-mode evaluation of IJVs junction valve plane, in standardized respiratory conditions.
Results: The valve absence was found in 34% on the right and in 43% on the left. A mono-cusp valve was demonstrated in 19% and in 35%, a bicuspid in 47% and in 22%, a tricuspid in 0%, respectively on the right and left IJV. In supine, the leaflets were always mobile with synchronous opening in relation either to right atrium contraction or respiration. In upright an area reduction of about 50% was recorded, and the valve remains open in any respiratory phase.
Conclusions: The absence of IJV valve in a relevant number of healthy subjects suggests a progressive lost of importance of such apparatus. In physiology, the valve leaflets are always mobile with bicuspid predominant shape, mono-cusp is possible, but tricuspid was never seen
See, there's something I didn't know. In the healthy individuals, the valves were always mobile when the individual was lying down but the valves remained fully open when the individual was upright.
In the healthy individuals, the valve leaflets were always mobile. This was in a sampling of 83 volunteers.
I immediately compare this to my own real-life example, when I had my ultrasound done and it was seen that the valve leaflet in my left jugular was completely immobile. This is not what's seen in healthy individuals. And it was treatable. Yay.