Jugular Vein
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2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Sung W. Rhee ◽  
Irina D. Pokrovskaya ◽  
Kelly K. Ball ◽  
Kenny Ling ◽  
Yajnesh Vedanaparti ◽  
...  

AbstractPrimary hemostasis results in a platelet-rich thrombus that has long been assumed to form a solid plug. Unexpectedly, our 3-dimensional (3D) electron microscopy of mouse jugular vein puncture wounds revealed that the resulting thrombi were structured about localized, nucleated platelet aggregates, pedestals and columns, that produced a vaulted thrombus capped by extravascular platelet adherence. Pedestal and column surfaces were lined by procoagulant platelets. Furthermore, early steps in thrombus assembly were sensitive to P2Y12 inhibition and late steps to thrombin inhibition. Based on these results, we propose a Cap and Build, puncture wound paradigm that should have translational implications for bleeding control and hemostasis.


Animals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2656
Author(s):  
José Manuel Hernández-Hernández ◽  
Graeme B. Martin ◽  
Carlos Miguel Becerril-Pérez ◽  
Arturo Pro-Martínez ◽  
César Cortez-Romero ◽  
...  

This study tested whether the intravenous application of kisspeptin can stimulate the pulsatile secretion of LH in suckling ewes during postpartum anestrus. Ten days after lambing, Pelibuey ewes were allocated among two groups: (1) continuous suckling (n = 8), where the lambs remained with their mothers; and (2) restricted suckling (n = 8), where the mothers suckled their lambs twice daily for 30 min. On Day 19 postpartum, the ewes were individually penned with ad libitum access to water and feed and given an indwelling catheter in each jugular vein. On Day 20, 4 mL of blood was sampled every 15 min from 08:00 to 20:00 h to determine LH pulse frequency. At 14:00 h, four ewes in each group received 120 μg of kisspeptin diluted in 3 mL of saline as a continuous infusion for 6 h; the remaining four ewes in each group received only saline. The interaction between kisspeptin and suckling type did not affect LH pulse frequency (p > 0.05). Before kisspeptin administration, pulse frequency was similar in all groups (1.50 ± 0.40 pulses per 6 h; p > 0.05). With the application of kisspeptin, pulse frequency increased to 3.50 ± 0.43 pulses per 6 h (p ≤ 0.014), so the concentration of LH (1.11 ± 0.14 ng mL−1) was greater in kisspeptin-treated ewes than in saline-treated ewes (0.724 ± 0.07 ng mL−1; p ≤ 0.040). The frequency of LH pulses was greater with restricted suckling than with continuous suckling (2.44 ± 0.29 versus 1.69 ± 0.29 pulses per 6 h; p ≤ 0.040). We conclude that intravenous application of kisspeptin increases the pulsatile secretion of LH in suckling ewes and that suckling might reduce kisspeptin neuronal activity, perhaps explaining the suppression of ovulation. Moreover, the effects of kisspeptin and suckling on pulsatile LH secretion appear to be independent, perhaps operating through different neural pathways.


2021 ◽  
Vol 5 (4) ◽  
pp. 1151-1155
Author(s):  
Rizki Amalia ◽  
Johanes Nugroho ◽  
Ivana Purnama Dewi

Introduction: The most common lesions of jugular vein dilatation are aneurysms and ectasia. A jugular vein aneurysm is less common compare to an arterial aneurysm in adults.  Because of the rare incidence, treatment guidelines primarily associated with the timing of surgery are not clearly established. Proper treatment can reduce patient complaints without excessive intervention. Case report: A 54 years old woman complained of swelling in the right neck that started three years ago and cephalgia for two years. From CT angiography, we obtained a jugular vein dilatation of 2.3 cm. During periodic evaluation from ultrasonography doppler, there is no increase in the size of the jugular vein. Conclusion: Jugular vein aneurysm presenting in adults is an infrequent phenomenon. It is a benign condition, and conservative observation is advised.  It should be operated only if symptomatic or progressive enlarging. A periodic examination must be done to evaluate the size of the jugular vein before a surgical decision


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sanghyun An ◽  
Junsik Kim ◽  
Donghyun Lee ◽  
Minwoo Kim ◽  
Kangil Byun ◽  
...  

AbstractThis study aimed to evaluate the biocompatibility and patency of our newly developed titanium vascular anastomotic device (TVAD) in a pig jugular vein. TVAD was made of commercially pure grade 2 titanium. The patency and anastomotic time were simultaneously confirmed in an ex-vivo system developed by the authors and in vivo using pig jugular veins. Five 8-month-old pigs, with body weights of 50–60 kg, underwent anastomosis of both jugular veins using the device. Graft patency was evaluated for 12 weeks by biplane angiography and sonography. All tissue biopsy samples were analysed by histology. In all 10 cases, the anastomosis was completed in < 5 min. The vessel lumen was not damaged, and the inner vessel wall was completely endothelialised at the anastomotic site. No foreign body reactions were observed at the vessel lumen, vessels, and outer vessel walls by histopathologic analysis. Patency and absence of leakage at the anastomotic site of the follow-up period were confirmed clearly by angiography and sonography. This preliminary animal study proved that our newly developed device is a very promising tool for intima-to-intima contact anastomosis. TVAD can be used as a feasible and safe medical tool for vessel anastomosis.


2021 ◽  
Vol 82 (9) ◽  
pp. 760-769
Author(s):  
O. Alberto Chiesa ◽  
Raoul Gonzales ◽  
Andrea Kouneski ◽  
Annie Lewandowski ◽  
David Rotstein ◽  
...  

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