20,372 results match your criteria microvascular surgery


Evaluation of the effectiveness of the tuba uterina tubular flap in the peripheral nervous system regeneration in rats.

J Plast Surg Hand Surg 2021 Jun 21:1-8. Epub 2021 Jun 21.

School of the Medicine, Department of Neurology, Selcuk University, Konya, Turkey.

Nerve conduits could be used to provide a bridge between both nerve endings. In this study, the tuba uterina of female rats were prepared in a vascularized pedicled flap model and it used as a nerve conduit. The aim was to investigate the effectiveness of a vascularized pedicle nerve conduit and its ciliated epithelium in a sciatic nerve defect. Read More

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Differentiation of human pluripotent stem cells to brain microvascular endothelial cell-like cells suitable to study immune cell interactions.

STAR Protoc 2021 Jun 2;2(2):100563. Epub 2021 Jun 2.

Theodor Kocher Institute, University of Bern, Freiestrasse 1, 3012 Bern, Switzerland.

We describe the extended endothelial cell culture method (EECM) for the differentiation of human pluripotent stem cells (hPSCs) into brain microvascular endothelial cell (BMEC)-like cells. EECM-BMEC-like cells resemble primary human BMECs in morphology, molecular junctional architecture, and diffusion barrier characteristics. A mature immune phenotype with proper endothelial adhesion molecule expression makes this model distinct from any other hPSC-derived blood-brain barrier (BBB) model and suitable to study immune cell migration across the BBB in a disease relevant and personalized fashion. Read More

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A decrease in macular microvascular perfusion after retinal detachment repair with silicone oil.

Int J Ophthalmol 2021 18;14(6):875-880. Epub 2021 Jun 18.

The Eye Hospital of Wenzhou Medical University, School of Opthalmology & Optometry, WMU, Zhejiang Eye Hospital, Hangzhou 310000, Zhejiang Province, China.

Aim: To observe whether silicone oil (SO) tamponade could decrease macular perfusion after retinal detachment repair.

Methods: A prospective observational case-control study. Patients diagnosed with primary macular off rhegmatogenous retinal detachment undergoing successful retinal repair surgery with vitrectomy were strictly selected. Read More

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Relationship between Macrovascular and Microvascular Hemodynamics Assessed by Spectrophotometry in Periodontal Diseases.

Int J Dent 2021 3;2021:9925198. Epub 2021 Jun 3.

University of Naples "Federico II", Napoli, Italy.

Objective: The aim of this study is to identify a possible link between macrovascular hemodynamic status and microvascular hemodynamic indices in patients with periodontal disease.

Methods And Materials: Seventeen adult patients are recruited on a voluntary basis at the Dentistry Department of the "Mater Domini" University of Catanzaro, with sampling that determines the lipid profile, blood glucose, inflammatory mediators, blood plasma viscosity: anamnesis, blood pressure measurement, and detection of anthropometric parameters: eco-Doppler of the carotid arteries and brachial arteries with noninvasive measurements of hemodynamics and evaluation of inflammation and periodontal circulation with a noninvasive spectroscopic technique. The subjects underwent a dental inspection with periodontal proves. Read More

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Osteoradionecrosis and microvascular free flap failure managed with negative pressure wound therapy: A case report.

Br J Neurosurg 2021 Jun 21:1-6. Epub 2021 Jun 21.

Department of Neurosurgery, Penn State Health Milton S. Hershey Medical Center, 500 University Drive, Hershey, PA, USA.

A 56-year-old female with a history of meningioma status post subtotal resection (Simpson grade IV) and extensive radiation therapy presented with osteoradionecrosis (O.R.N. Read More

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Elevated Preoperative CA125 Levels Predicts Poor Prognosis of Hilar Cholangiocarcinoma Receiving Radical Surgery.

Clin Res Hepatol Gastroenterol 2021 Jun 17:101695. Epub 2021 Jun 17.

Department of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China. Electronic address:

Background: Preoperative serum carbohydrate antigen 125 (CA125) is used to judge the diagnosis and prognosis of various tumors. However, the relationship between preoperative serum CA125 and prognosis of hilar cholangiocarcinoma (HCCA) has not been proven. This study aims to evaluate preoperative serum CA125 in predicting the prognosis of HCCA after resection. Read More

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Middle meningeal artery embolization for postoperative supratentorial chronic subdural hematoma occurring after posterior fossa neurosurgery.

J Cerebrovasc Endovasc Neurosurg 2021 Jun 18. Epub 2021 Jun 18.

Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea.

Chronic subdural hematoma (CSDH) after posterior fossa surgery is rare but may occur. A 70-year-old man with trigeminal neuralgia underwent microvascular decompression. The patient took several medications for trigeminal neuralgia and tremor for a long time. Read More

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Simultaneous 3D Visualization of the Microvascular and Neural Network in Mouse Spinal Cord Using Synchrotron Radiation Micro-Computed Tomography.

Neurosci Bull 2021 Jun 19. Epub 2021 Jun 19.

Department of Spine Surgery, Xiangya Hospital, Central South University, Changsha, 410008, China.

Effective methods for visualizing neurovascular morphology are essential for understanding the normal spinal cord and the morphological alterations associated with diseases. However, ideal techniques for simultaneously imaging neurovascular structure in a broad region of a specimen are still lacking. In this study, we combined Golgi staining with angiography and synchrotron radiation micro-computed tomography (SRμCT) to visualize the 3D neurovascular network in the mouse spinal cord. Read More

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Consensus of free flap complications: Using a nomenclature paradigm in microvascular head and neck reconstruction.

Head Neck 2021 Jun 18. Epub 2021 Jun 18.

Department of Otolaryngology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.

Background: We aim to define a set of terms for common free flap complications with evidence-based descriptions.

Methods: Clinical consensus surveys were conducted among a panel of head and neck/reconstructive surgeons (N = 11). A content validity index for relevancy and clarity for each item was computed and adjusted for chance agreement (modified kappa, K). Read More

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Advanced donor age does not increase risk of hepatocellular carcinoma recurrence after liver transplantation: a retrospective two-center analysis using competing risk analysis.

Transpl Int 2021 Jun 18. Epub 2021 Jun 18.

CHU Rennes, Service de Chirurgie Hépatobiliaire et Digestive, F-35033, Rennes, France.

The impact of donor age on the recurrence of hepatocellular carcinoma (HCC) after liver transplantation is still debated. Between 2002-2014, all patients transplanted for HCC in 2 European liver transplantation tertiary centers, were retrospectively reviewed. Risks factors for HCC recurrence were assessed using competing risk analysis and the impact of donor age < or ≥65 years and < or ≥80 years was specifically evaluated after propensity score matching. Read More

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Microvascular anastomosis techniques using the medical adhesive VIVO and expandable micro-stents in a rat carotid artery model.

Ann Anat 2021 Jun 15:151782. Epub 2021 Jun 15.

Department of Oral and Maxillofacial Surgery, University Hospital of Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.

Background: Sutured anastomosis remains the gold standard in microvascular surgery. The procedure is not free of complications and is a time-consuming operation requiring a high level of experience. The aim of this study was to develop new methods for a stable, faster, and safer anastomosis using a novel biodegradable adhesive, VIVO, and a custom-made microvascular stent. Read More

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Ketogenic Metabolic Therapy, Without Chemo or Radiation, for the Long-Term Management of -Mutant Glioblastoma: An 80-Month Follow-Up Case Report.

Front Nutr 2021 31;8:682243. Epub 2021 May 31.

Department of Radiology, St. Christopher Hospital for Children, Drexel University School of Medicine, Philadelphia, PA, United States.

Successful treatment of glioblastoma (GBM) remains futile despite decades of intense research. GBM is similar to most other malignant cancers in requiring glucose and glutamine for growth, regardless of histological or genetic heterogeneity. Ketogenic metabolic therapy (KMT) is a non-toxic nutritional intervention for cancer management. Read More

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Peritumoral Dilation Radiomics of Gadoxetate Disodium-Enhanced MRI Excellently Predicts Early Recurrence of Hepatocellular Carcinoma without Macrovascular Invasion After Hepatectomy.

J Hepatocell Carcinoma 2021 9;8:545-563. Epub 2021 Jun 9.

Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, People's Republic of China.

Background: Whether peritumoral dilation radiomics can excellently predict early recrudescence (≤2 years) in hepatocellular carcinoma (HCC) remains unclear.

Methods: Between March 2012 and June 2018, 323 pathologically confirmed HCC patients without macrovascular invasion, who underwent liver resection and preoperative gadoxetate disodium (Gd-EOB-DTPA) MRI, were consecutively recruited into this study. Multivariate logistic regression identified independent clinicoradiologic predictors of 2-year recrudescence. Read More

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Endovascular treatment of iatrogenic superior mesenteric arteriovenous fistula resulting in recurrent abdominal ascites.

BJR Case Rep 2021 May 1;7(3):20200205. Epub 2021 May 1.

Department of Radiology, Pamela Youde Nethersole Eastern Hospital, Chai Wan, Hong Kong.

Superior mesenteric arteriovenous fistulas (AVFs) are rare and are usually caused by previous bowel surgery or blunt abdominal trauma. Patients may be asymptomatic, have non-specific symptoms of abdominal pain, nausea and vomiting or present with symptoms of portal hypertension; some patients may present years after initial surgery or trauma. Traditionally, superior mesenteric AVFs are treated by surgical ligation. Read More

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Expert Consensus Statement on the Perioperative Management of Adult Patients Undergoing Head and Neck Surgery and Free Tissue Reconstruction From the Society for Head and Neck Anesthesia.

Anesth Analg 2021 Jul;133(1):274-283

Departments of General Anesthesiology and Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, Ohio.

The perioperative care of adult patients undergoing free tissue transfer during head and neck surgical (microvascular) reconstruction is inconsistent across practitioners and institutions. The executive board of the Society for Head and Neck Anesthesia (SHANA) nominated specialized anesthesiologists and head and neck surgeons to an expert group, to develop expert consensus statements. The group conducted an extensive review of the literature to identify evidence and gaps and to prioritize quality improvement opportunities. Read More

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Continuous improvements in short and long-term outcomes after partial hepatectomy for hepatocellular carcinoma in the 21st century: Single institution experience with 1300 resections over 18 years.

Surg Oncol 2021 Jun 1;38:101609. Epub 2021 Jun 1.

Department of Hepatopancreatobiliary and Transplant Surgery, Singapore General Hospital, Singapore; Duke-National University of Singapore Medical School, Singapore.

Introduction: To investigate the changing trends in short- and long-term outcomes after partial hepatectomy(PH) for hepatocellular carcinoma(HCC) performed in the 21st century.

Methods: A retrospective review was conducted on 1300 consecutive patients who underwent PH for HCC. The study cohort was divided into 3 time periods(P): P1(2000-2005), P2(2006-2011) and P3(20012-2017). Read More

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Quantitative study of preoperative staging of gastric cancer using intravoxel incoherent motion diffusion-weighted imaging as a potential clinical index.

Eur J Radiol 2021 Mar 4;141:109627. Epub 2021 Mar 4.

Department of Gastrointestinal Surgery, Zhongshan Hospital, Xiamen University, Xiamen, Fujian, 361004, China; Institute of Gastrointestinal Oncology, School of Medicine, Xiamen University, Xiamen, Fujian, 361004, China; Xiamen Municipal Key Laboratory of Gastrointestinal Oncology, Xiamen, Fujian, 361004, China. Electronic address:

Purpose: To determine the utility of intravoxel incoherent motion (IVIM) diffusion-weighted imaging in quantitative analysis of preoperative tumor (T) and node (N) stages of gastric cancer, and to quantify the diagnostic threshold of IVIM parameters for serosal invasion and lymphatic metastasis.

Materials And Methods: From October 2016 to February 2020, 98 patients with gastric cancer who were receiving treatment in Zhongshan Hospital, China, were subject to an IVIM sequence imaging analysis. The IVIM sequence data were imported into software for post-processing of tumor regions of interest, and the IVIM parameters (the microvascular volume fraction (f), the molecular diffusion coefficient (D) and perfusion-related incoherent microcirculation (D*) were calculated. Read More

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Dentoalveolar outcomes in maxillary reconstruction: A retrospective review of 85 maxillectomy reconstructions.

ANZ J Surg 2021 Jun 14. Epub 2021 Jun 14.

Department of Head and Neck Surgery, Sydney Head and Neck Cancer Institute, Chris O'Brien Lifehouse, Sydney, New South Wales, Australia.

Background: Although microvascular free flaps are often used to reconstruct maxillary defects, dentoalveolar rehabilitation is arguably less common despite its importance to midface function and aesthetics. The aim of this study is to review the contemporary management of maxillary defects in a single quaternary referral institution to identify factors that assist or impede dentoalveolar rehabilitation.

Methods: A retrospective review of maxillary reconstructions performed between February 2017 and December 2020 was performed. Read More

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An Overview of the Posttranslational Modifications and Related Molecular Mechanisms in Diabetic Nephropathy.

Front Cell Dev Biol 2021 28;9:630401. Epub 2021 May 28.

Department of Chinese Materia Medica and Natural Medicines, School of Pharmacy, The Air Force Medical University, Xi'an, China.

Diabetic nephropathy (DN), a common diabetic microvascular complication, is characterized by its complex pathogenesis, higher risk of mortality, and the lack of effective diagnosis and treatment methods. Many studies focus on the diagnosis and treatment of diabetes mellitus (DM) and have reported that the pathophysiology of DN is very complex, involving many molecules and abnormal cellular activities. Given the respective pivotal roles of NF-κB, Nrf2, and TGF-β in inflammation, oxidative stress, and fibrosis during DN, we first review the effect of posttranslational modifications on these vital molecules in DN. Read More

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Revisiting Surgical Strategies for Hepatocellular Carcinoma With Microvascular Invasion.

Front Oncol 2021 27;11:691354. Epub 2021 May 27.

Hepatic Surgery Center, Tongji Hospital, Tongji Medical College Huazhong University of Science and Technology, Wuhan, China.

Although liver resection (LR) and liver transplantation (LT) are widely considered as potentially curative therapies for selected patients with hepatocellular carcinoma (HCC); however, there is still high risk of tumor recurrence in majority of HCC patients. Previous studies demonstrated that the presence of microvascular invasion (MVI), which was defined as the presence of tumor emboli within the vessels adjacent to HCC, was one of the key factors of early HCC recurrence and poor surgical outcomes after LR or LT. In this review, we evaluated the impact of current MVI status on surgical outcomes after curative therapies and aimed to explore the surgical strategies for HCC based on different MVI status with evidence from pathological examination. Read More

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The guiding value of microvascular invasion for treating early recurrent small hepatocellular carcinoma.

Int J Hyperthermia 2021 ;38(1):931-938

Collaborative Innovation Center for Cancer Medicine, State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, China.

Introduction: Hepatocellular carcinoma (HCC) patients with microvascular invasion (MVI) have worse survival. Whether the presence of MVI indicates the necessity of more aggressive locoregional treatments for recurrences remains to be elucidated.

Methods: We reviewed patients who underwent curative hepatectomy for primary HCC in our institution, and 379 patients with recurrent HCC up to three nodules smaller than 3 cm were enrolled. Read More

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January 2021

Superb microvascular imaging (SMI) detects increased vascularity of the torn anterior cruciate ligament.

Knee Surg Sports Traumatol Arthrosc 2021 Jun 13. Epub 2021 Jun 13.

Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.

Purpose: Ultrasound with superb microvascular imaging (SMI) is a novel microvascular imaging technology which may be useful to assess the vascularity of the torn anterior cruciate ligament (ACL) as a potential measure of healing potential following surgery. This study aimed to quantify the vascularity of the torn and intact ACL using ultrasound with SMI.

Methods: 23 patients (mean age ± standard deviation, 27. Read More

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Perioperative Albumin Supplementation is Associated With Decreased Risk of Complications Following Microvascular Head and Neck Reconstruction.

J Oral Maxillofac Surg 2021 May 13. Epub 2021 May 13.

Professor, Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China. Electronic address:

Purpose: Studies have demonstrated that low serum albumin levels are associated with a high postoperative complication rate after microvascular free flap reconstruction. The aim of this study was to investigate whether perioperative albumin supplementation reduced the postoperative complications of microvascular free flap reconstruction in oral and maxillofacial tumor resections.

Patients And Methods: Patients who underwent microvascular free flap reconstruction during oral and maxillofacial tumor resections from January 2012 to December 2017 were enrolled in this retrospective study. Read More

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Expert Perspective: Management of Microvascular and Catastrophic Antiphospholipid Syndrome.

Authors:
Doruk Erkan

Arthritis Rheumatol 2021 Jun 11. Epub 2021 Jun 11.

Barbara Volcker Center for Women and Rheumatic Diseases, Hospital for Special Surgery; Weill Cornell Medicine, New York, NY, USA.

A 50-year-old male with antiphospholipid syndrome (APS) presents to your office for the first time with a three-month history of worsening dyspnea, dry cough, and early morning blood-tinged sputum. His APS diagnosis was based on an unprovoked left lower extremity deep vein thrombosis, four years prior to the presentation, with persistent (multiple occasions) triple antiphospholipid antibody (aPL)-positivity, defined as lupus anticoagulant (LA) test positive performed while off anticoagulation, high titer [≥80 U] IgG anticardiolipin antibodies (aCL), and high titer IgG anti-β -glycoprotein-I (aβ GPI). He has no other past medical history; and he is on warfarin with a target international normalized ratio (INR) of 2. Read More

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Spontaneous regression of angiolymphoid hyperplasia with eosinophilia (AHLE): A case report.

Ann Med Surg (Lond) 2021 Jun 15;66:102376. Epub 2021 May 15.

Department of Dermatology and Venerology, Ibn Rochd University Hospital, Casablanca, Morocco.

Introduction: and importance - Angiolymphoid hyperplasia with eosinophilia (ALHE) is a rare benign microvascular proliferation. It is clinically characterized by intradermal or subcutaneous papules and/or nodules. Treatment consists mainly of surgery or laser therapy, with a high recurrence rate. Read More

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Establishment and Evaluation of a Predictive Model for Early Postoperative Recurrence of Hepatocellular Carcinoma in Patients with Microvascular Invasion.

Int J Gen Med 2021 3;14:2259-2274. Epub 2021 Jun 3.

Department of Hepatobiliary Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100021, People's Republic of China.

Objective: The present study aimed to identify the risk factors for early postoperative recurrence of hepatocellular carcinoma (HCC) in patients with microvascular invasion (MVI) and develop a predictive model.

Inclusion Population And Methods: Patients who underwent surgery for HCC with pathological identification of MVI at the Cancer Hospital of the Chinese Academy of Medical Sciences from January 2014 to June 2019 were consecutively enrolled in this study. A total of 416 patients were included, divided into an early recurrence group (N = 169) and a non-early recurrence group (N = 247), taking 12 months as the cut-off point for early recurrence. Read More

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Mesenchymal Stromal (stem) Cell (MSC) therapy modulates miR-193b-5p expression to attenuate sepsis-induced acute lung injury.

Eur Respir J 2021 Jun 10. Epub 2021 Jun 10.

Department of Medicine, University of Washington, Seattle, WA, USA.

Although mesenchymal stromal (stem) cell (MSC) administration attenuates sepsis-induced lung injury in pre-clinical models, the mechanism(s) of action and host immune system contributions to its therapeutic effects, remain elusive. We show that treatment with MSCs decreased expression of host-derived microRNA (miR)-193b-5p and increased expression of its target gene, the tight junctional protein occludin (Ocln), in lungs from septic mice. Mutating the Ocln 3' UTR miR-193b-5p binding sequence impaired binding to Ocln mRNA. Read More

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Impact of microvascular injury various types on function of left ventricular in patients with primary myocardial infarction with ST segment elevation.

Kardiologiia 2021 May 31;61(5):23-31. Epub 2021 May 31.

Cardiology Research Institute, Tomsk National Research Medical Centre; Siberian State Medical University, Tomsk.

Aim: To analyze the long-term effect of microvascular injury various types on the structural and functional parameters of the left ventricle assessed by echocardiography in patients with primary ST-segment elevation myocardial infarction (STEMI).

Materials And Methods: The study included 60 patients with primary STEMI admitted within the first 12 hours after the onset of disease who underwent stenting of the infarct-associated coronary artery. Each patient included in the study underwent CMR imaging on the second day post-STEMI. Read More

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Comprehensive Proteomic Profiling of Aqueous Humor Proteins in Proliferative Diabetic Retinopathy.

Transl Vis Sci Technol 2021 May;10(6)

State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong Province, China.

Purpose: Proliferative diabetic retinopathy (PDR) is a serious ocular disease that can lead to retinal microvascular complications in patients with diabetes mellitus. To date, no studies have explored PDR development by analyzing the aqueous humor (AH). Therefore we carried out tandem mass tag (TMT) proteomic quantification to compare AH protein profiles between PDR and non-PDR subjects. Read More

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Advances in Revascularization for Peripheral Artery Disease: Revascularization in PAD.

Circ Res 2021 Jun 10;128(12):1885-1912. Epub 2021 Jun 10.

Division of Vascular and Endovascular Surgery, University of California, San Francisco (P.A.S., M.S.C.).

Effective revascularization of the patient with peripheral artery disease is about more than the procedure. The approach to the patient with symptom-limiting intermittent claudication or limb-threatening ischemia begins with understanding the population at risk and variation in clinical presentation. The urgency of revascularization varies significantly by presentation; from patients with intermittent claudication who should undergo structured exercise rehabilitation before revascularization (if needed) to those with acute limb ischemia, a medical emergency, who require revascularization within hours. Read More

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