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Vein harvesting

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https://www.readbyqxmd.com/read/28230931/spatially-assembled-bilayer-cell-sheets-of-stem-cells-and-endothelial-cells-using-thermosensitive-hydrogels-for-therapeutic-angiogenesis
#1
Indong Jun, Taufiq Ahmad, Seongwoo Bak, Joong-Yup Lee, Eun Mi Kim, Jinkyu Lee, Yu Bin Lee, Hongsoo Jeong, Hojeong Jeon, Heungsoo Shin
Although the coculture of multiple cell types has been widely employed in regenerative medicine, in vivo transplantation of cocultured cells while maintaining the hierarchical structure remains challenging. Here, a spatially assembled bilayer cell sheet of human mesenchymal stem cells and human umbilical vein endothelial cells on a thermally expandable hydrogel containing fibronectin is prepared and its effect on in vitro proangiogenic functions and in vivo ischemic injury is investigated. The expansion of hydrogels in response to a temperature change from 37 to 4 °C allows rapid harvest and delivery of the bilayer cell sheet to two different targets (an in vitro model glass surface and in vivo tissue)...
February 23, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28224430/edaravone-enhances-the-viability-of-ischemia-reperfusion-flaps
#2
Dong-Yi Zhang, Shen-Song Kang, Zheng-Wen Zhang, Rui Wu
The purpose of the experiment was to study the efficacy of edaravone in enhancing flap viability after ischemia/reperfusion (IR) and its mechanism. Forty-eight adult male SD rats were randomly divided into 3 groups: control group (n=16), IR group (n=16), and edaravone-treated IR group (n=16). An island flap at left lower abdomen (6.0 cm×3.0 cm in size), fed by the superficial epigastric artery and vein, was created in each rat of all the three groups. The arterial blood flow of flaps in IR group and edaravone-treated IR group was blocked for 10 h, and then the blood perfusion was restored...
February 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/28209182/mesenchymal-stem-cells-alleviate-japanese-encephalitis-virus-induced-neuroinflammation-and-mortality
#3
Peiyu Bian, Chuantao Ye, Xuyang Zheng, Jing Yang, Wei Ye, Yuan Wang, Yun Zhou, Hongwei Ma, Peijun Han, Hai Zhang, Ying Zhang, Fanglin Zhang, Yingfeng Lei, Zhansheng Jia
BACKGROUND: Japanese encephalitis virus (JEV) is the leading cause of viral encephalitis in Asia. Japanese encephalitis (JE) caused by JEV is characterized by extensive inflammatory cytokine secretion, microglia activation, blood-brain barrier (BBB) breakdown, and neuronal death, all of which contribute to the vicious cycle of inflammatory damage. There are currently no effective treatments for JE. Mesenchymal stem cells (MSCs) have been demonstrated to have a therapeutic effect on many central nervous system (CNS) diseases by regulating inflammation and other mechanisms...
February 16, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28203557/inhibitory-effect-of-sustained-perivascular-delivery-of-paclitaxel-on-neointimal-hyperplasia-in-the-jugular-vein-after-open-cutdown-central-venous-catheter-placement-in-rats
#4
Seongyup Kim, Younglim Kim, Ji Woong Hwang, Suk-Bae Moon
PURPOSE: Inhibitory effect of paclitaxel on neointimal hyperplasia after open cutdown has not been elucidated. METHODS: For the control group (n = 16), silicone 2.7-Fr catheters were placed via the right external jugular vein with the cutdown method. For the treatment group (n = 16), a mixture of 0.65 mg of paclitaxel and 1 mL of fibrin glue was infiltrated around the exposed vein after cutdown. After scheduled intervals (1, 2, 4, and 8 weeks), the vein segment was harvested and morphometric analysis was performed on cross-sections...
February 2017: Annals of Surgical Treatment and Research
https://www.readbyqxmd.com/read/28144710/selective-venous-vasodilator-properties-of-the-analgesic-metamizole-dipyrone-in-a-human-ex-vivo-model-implications-for-postoperative-pain-management
#5
Markus Hoenicka, Hagen Gorki, Karl Traeger, Andreas Liebold
Metamizole (dipyrone) is a first-line, non-opioid analgesic used for postoperative pain management. Clinical data and animal experiments indicate a possible vasodilator action of this drug. We investigated the effects of metamizole on human artery and vein tone in an ex vivo model to assess potential contributions to venous pooling. Excess segments of bypass grafts were harvested during coronary artery bypass grafting procedures. Tensions were measured in an organ bath for 120 min after adding metamizole to the preconstricted vessels...
January 31, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28120743/long-term-follow-up-of-patients-after-autologous-bone-marrow-cell-infusion-for-decompensated-liver-cirrhosis
#6
Ja Kyung Kim, Soo-Jeong Kim, Yuri Kim, Yong Eun Chung, Young Nyun Park, Hyun Ok Kim, Jin Seok Kim, Mi-Suk Park, Isao Sakaida, Do Young Kim, Jung Il Lee, Sang Hoon Ahn, Kwan Sik Lee, Kwang-Hyub Han
<p>Although several human clinical trials using various bone marrow-derived cell types for cirrhotic or decompensated patients have reported a short-term benefit, long-term follow-up data are limited. We analyzed the long-term clinical outcomes of autologous bone marrow cell infusion (ABMI) for decompensated liver cirrhosis (LC).</p><p>Patients enrolled in a pilot single-armed ABMI study were followed up more than 5 years. Bone marrow mononuclear cells from decompensated LC were harvested and after processing, infused into a peripheral vein...
January 24, 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28118552/decellularized-tooth-bud-scaffolds-for-tooth-regeneration
#7
W Zhang, B Vazquez, D Oreadi, P C Yelick
Whole tooth regeneration approaches currently are limited by our inability to bioengineer full-sized, living replacement teeth. Recently, decellularized organ scaffolds have shown promise for applications in regenerative medicine by providing a natural extracellular matrix environment that promotes cell attachment and tissue-specific differentiation leading to full-sized organ regeneration. We hypothesize that decellularized tooth buds (dTBs) created from unerupted porcine tooth buds (TBs) can be used to guide reseeded dental cell differentiation to form whole bioengineered teeth, thereby providing a potential off-the-shelf scaffold for whole tooth regeneration...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28117809/vein-interposition-model-a-suitable-model-to-study-bypass-graft-patency
#8
Dong Wang, Grigol Tediashvili, Simon Pecha, Hermann Reichenspurner, Tobias Deuse, Sonja Schrepfer
Bypass grafting is an established treatment method for coronary artery disease. Graft patency continues to be the Achilles heel of saphenous vein grafts. Research models for bypass graft failure are essential for a better understanding of pathobiological and pathophysiological processes during graft patency loss. Large animal models, such as pigs or sheep, resemble human anatomical structures but require special facilities and equipment. This video describes a rat vein interposition model to investigate vein graft patency loss...
January 15, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28112431/the-proximal-superficial-femoral-artery-perforator-flap-anatomic-study-and-clinical-cases
#9
Imran Ratanshi, Colin W McInnes, Avinash Islur
BACKGROUND: The upper thigh has provided multiple new soft tissue free flaps in recent decades, including the anterolateral thigh, anteromedial thigh, transverse upper gracilis, the profunda artery perforator, and superficial circumflex iliac perforator flaps. The purpose of this study is to describe a new, reliable free flap option in the upper thigh: the proximal superficial femoral artery perforator (p-SFAP) flap. METHODS: A cadaveric dissection study was performed to confirm clinical landmarks and evaluate pedicle characteristics...
January 23, 2017: Microsurgery
https://www.readbyqxmd.com/read/28111865/portal-vein-reconstruction-using-vein-grafts-in-pediatric-living-donor-liver-transplantation-current-status
#10
Tarek Abdelazeem Sabra, Hideaki Okajima, Atsushi Yoshizawa, Tatsuya Okamoto, Takayuki Anazawa, Shintaro Ygi, Koichiro Hata, Kentaro Yasuchika, Kojiro Taura, Etsuro Hatano, Toshimi Kaido, Shinji Uemoto
PV reconstruction is an important aspect of LDLT, with post-transplant outcomes depending on PV reconstruction methods. However, it is unclear whether the preferential selection of these techniques is dependent on preoperative recipient characteristics. This retrospective study assessed whether preoperative recipient factors differed in pediatric patients who did and did not receive VGs for PV reconstruction. Of 113 pediatric patients who underwent LDLT from January 2010 to July 2015, 31 (27%) underwent PV reconstruction with VGs and the other 82 (73%) without VGs...
January 22, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28109145/-short-term-use-of-rapamycin-combined-with-tregs-prolongs-mouse-cardiac-graft-survival-but-attenuates-recipient-s-anti-tumor-immunity
#11
Ting Yan, Chen Luo, Xianmo Yang, Lei Ji, Shiqiao Luo
Objective To study the effect of short-term use of rapamycin(Rap) combined with regulatory T cells (Tregs) on the long-time survival of allogeneic mouse cardiac transplant, and its impact on the anti-tumor immunity of recipient. MethodsMouse Tregs were purified from recipients' spleen by magnetic activated cell sorting (MACS), and expanded by CD3/CD28 monoclonal antibody immunomagnetic beads and 2000 U/mL recombinant mouse IL-2 (rmIL-2) ex vivo. The purity was tested by fluorescence-activated cell sorting (FACS)...
February 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28106508/gelma-encapsulated-hdpscs-and-huvecs-for-dental-pulp-regeneration
#12
A Khayat, N Monteiro, E E Smith, S Pagni, W Zhang, A Khademhosseini, P C Yelick
Pulpal revascularization is commonly used in the dental clinic to obtain apical closure of immature permanent teeth with thin dentinal walls. Although sometimes successful, stimulating bleeding from the periapical area of the tooth can be challenging and in turn may deleteriously affect tooth root maturation. Our objective here was to define reliable methods to regenerate pulp-like tissues in tooth root segments (RSs). G1 RSs were injected with human dental pulp stem cells (hDPSCs) and human umbilical vein endothelial cells (HUVECs) encapsulated in 5% gelatin methacrylate (GelMA) hydrogel...
February 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28099357/bilayered-negative-pressure-wound-therapy-preventing-leg-incision-morbidity-in-coronary-artery-bypass-graft-patients-a-randomized-controlled-trial
#13
RANDOMIZED CONTROLLED TRIAL
Yongchao Yu, Zhigang Song, Zhiyun Xu, Xiaofei Ye, Chunyu Xue, Junhui Li, Hongda Bi
BACKGROUNDS: The harvesting of great saphenous veins for coronary artery bypass graft (CABG) patients may result in significant complications, including lymphorrhagia, lymphoedema, incision infection, wound dehiscence, and skin flap necrosis. We investigated the function of a self-designed bilayered negative pressure wound therapy (b-NPWT) for reducing the above-mentioned complications using a clinical randomized controlled trial. METHODS: A single-center, pilot randomized controlled trial was conducted...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28098961/angiogenic-and-osteogenic-regeneration-in-rats-via-calcium-phosphate-scaffold-and-endothelial-cell-coculture-with-hbmscs-hucmscs-hipsc-mscs-and-hesc-mscs
#14
Wenchuan Chen, Xian Liu, Qianmin Chen, Chongyun Bao, Liang Zhao, Zhimin Zhu, Hockin H K Xu
Angiogenesis is a limiting factor in regenerating large bone defects. The objective of this study was to investigate angiogenic and osteogenic effects of coculture on calcium phosphate cement (CPC) scaffold using human umbilical vein endothelial cells (hUVECs) and mesenchymal stem cells (MSCs) from different origins for the first time. hUVECs were cocultured with four types of cells: human umbilical cord MSCs (hUCMSCs), human bone marrow MSCs (hBMSCs), and MSCs from induced pluripotent stem cells (hiPSC-MSCs) and embryonic stem cells (hESC-MSCs)...
January 18, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28092273/in-vivo-testing-of-extracorporeal-membrane-ventilators-ila-activve%C3%A2-vs-prototype-i-lung%C3%A2
#15
Sabine Kischkel, Stefan Bergt, Beate Brock, Johan von Grönheim, Anne Herbst, Marc-Jonas Epping, Georg Matheis, Esther Novosel, Joerg Schneider, Philipp Warnke, Andreas Podbielski, Jan P Roesner, Peter I Lelkes, Brigitte Vollmar
A side-by-side comparison of the decarboxylation efficacy of two pump-driven veno-venous extracorporeal lung assist devices, i.e. a first prototype of the new miniaturized ambulatory extracorporeal membrane ventilator, I-lung® versus the commercial system iLA-activve® over a period of 72 hours in a large animal model.Fifteen German Landrace pigs were anesthetized and underwent mechanical hypoventilation to induce severe hypercapnia. Decarboxylation was accomplished by either the I-lung® or the iLA-activve® via a double lumen catheter in the jugular vein...
January 4, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28076625/endoscopic-or-no-touch-vein-harvesting-for-cabg-what-is-best-for-the-patient
#16
Tomislav Kopjar, Stjepan Ivankovic, Melchior Luiz Lima, Bruno Botelho Pinheiro, Michael Richard Dashwood
No abstract text is available yet for this article.
November 2016: Brazilian Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28063277/straightforward-method-for-coverage-of-major-vessels-after-modified-radical-neck-dissection
#17
Raúl González-García, Carlos Moreno-García, Manuel Moreno-Sánchez, Leticia Román-Romero
A new method for covering the internal jugular vein and carotid artery after exposure of the cervical vascular axis subsequent to neck dissection is presented. To cover the most caudal part of the vascular axis, a platysma coli muscle flap is harvested from its most medial and inferior part of the neck in a caudally based fashion and is slightly rotated posteriorly up to 45°. In addition, a superiorly based sternocleidomastoid muscle flap involving the posterior half of the muscle after detachment of the clavicle head is harvested and rotated 45° anteriorly to cover the upper two thirds of the vascular axis...
December 15, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28032566/rabbit-model-provides-new-insights-in-liver-regeneration-after-transection-with-portal-vein-ligation
#18
Mingheng Liao, Tao Zhang, Haichuan Wang, Ying Liu, Minxun Lu, Jiwei Huang, Yong Zeng
BACKGROUND: The rabbit model of associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) has not been reported before. MATERIALS AND METHODS: New Zealand white rabbits were allocated to two protocols. Protocol 1 involved either liver parenchymal transection (LPT, n = 5) or portal vein ligation (PVL, n = 5). Protocol 2 involved the ligation of different portal vein branches combined with liver partition, including the LPT + 20% PVL group (n = 5; the caudate portal vein was ligated), the LPT + 50% PVL group (n = 5; the left portal vein was ligated), and the LPT + 70% PVL group (n = 10; both veins were ligated)...
November 2, 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/28027615/living-donor-liver-transplantation-using-an-extended-right-lateral-sector-graft
#19
N Yoshida, T Takamoto, T Hashimoto, Y Maruyama, H Abe, K Shimada, T Takayama, M Makuuchi
There are three grafts (left, right and right lateral sector [RLS]) available for adult living donor liver transplantation (LDLT), and we herein report LDLT performed using an extended RLS graft. An extended RLS graft is an RLS plus right paramedian dorsal sector (RPMS-dorsal) graft. In this case, the proportion of the RLS graft of the predicted graft volume (GV) to the recipient's standard liver volume (SLV) was only 17.7%, preoperatively. A three-dimensional (3D) analysis, showed that the RPMS-dorsal branches of the portal veins branched from the posterior trunk not the anterior trunk...
December 27, 2016: Liver Transplantation
https://www.readbyqxmd.com/read/28025309/safety-and-efficacy-of-prophylactic-negative-pressure-wound-therapy-following-open-saphenous-vein-harvest-in-cardiac-surgery-a-feasibility-study
#20
Arthur J Lee, Christina E Sheppard, William D T Kent, Holly Mewhort, Khokan C Sikdar, Paul W M Fedak
OBJECTIVES: Surgical site complications following great saphenous vein (GSV) harvest presents a significant risk of morbidity. Negative pressure wound therapy (NPWT) has shown promise in the treatment and prophylaxis of open wounds and surgical incisions but has not been studied following GSV harvest. We performed a feasibility study examining the use of NPWT following GSV harvest for coronary bypass surgery. METHODS: Sixty-four patients were recruited in this single-centre, single-blind, randomized controlled trial...
December 26, 2016: Interactive Cardiovascular and Thoracic Surgery
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