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Hypercoagulability in Liver Transplant Recipients: Does Portal Vein Thrombosis Predict Post-Operative Thrombotic Complications?

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Open Journal of Organ Transplant Surgery 2011年第1期1卷 1-7页

作者： brintha k. enestvedt C. k.istian enestvedt Brian Diggs Susan L. Orloff 不详

Back.round: Cirrhotic patients have higher rates of hypercoagulable disorders. We hypothesized that orthotopic liver transplant (OLT) recipients with pre-operative portal vein thrombosis (PVT) have more post-operative thrombotic events than those without PVT. Aims: To compare rates of post-op thrombotic events and outcomes between those with and without pre-op PVT. Methods: All OLT recipients between 1/02-4/09 were retrospectively reviewed. Outcome measures included survival, deep venous thrombosis, pulmonary embolism, hepatic artery thrombosis, and recurrent PVT. Minimum follow up was 6 months. Results: In 363 OLTs performed, mean recipient age was 53.1 yrs (±9.2);268 patients were male. Mean MELD at transplant was 22.1 (±6.2). The prevalence of pre-op PVT was 11.2% (41/350). There was no difference in the % of post-op thrombotic events between those with and without PVT (p = 0.77). MELD, recipient and donor age, and gender were similar in both groups. Mean survival in those with pre-op PVT was 85.2 months vs. 78.7 in those without PVT (p = 0.19). Conclusions: The rate of post-op thrombotic events was equivalent in OLT recipients with and without pre-op PVT. The presence of PVT did not adversely impact patient survival and should not be a contraindication to OLT.

关键词： Portal Vein Thrombosis Orthotopic Liver Transplantation Hypercoagulability Thromboses

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Review on Dynamic Bandwidth Allocation of GPON and EPON

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Journal of Electronic Science and Technology 2020年第4期18卷 297-307页

作者： Theresal Thangappan brintha Therese Adi Suvarnamma Gadda Sai Swapna School of Electronics and Communication Engineering Vellore Institute of Technology(Chennai Campus)Chennai 632014 School of Electronics and Communication Engineering Vels UniversityChennai 600117 School of Electronics and Communication Engineering Government Polytechnic CollegeAdhoni 518301

The passive optical network.PON)technology has been drastically improved in recent *** spite of using the optical technology,the utilization of the entire bandwidth is a very challenging *** main categories of PON are the Ethernet passive optical network.EPON)and gigabit passive optical network.GPON).These two network. use the dynamic bandwidth allocation(DBA)algorithm to attain the maximum usage of bandwidth,which is provided in the network.dynamically according to the need of the customers with the support of the service level agreement(SLA).This paper will provide a clear review about the DBA algorithm of both technologies as well as the comparison。

关键词： Dynamic bandwidth allocation(DBA) Ethernet passive optical network.EPON) gigabit passive optical network.GPON)

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