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Efficacy and safety of ultrasound-guided above-knee lateral approach for popliteal sciatic nerve block in surgeries below the knee: a randomized controlled trial.

Ann Palliat Med 2021 May 10. Epub 2021 May 10.

Department of Anesthesiology and Perioperative Medicine, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China.

Background: Ultrasound guidance has become a standard method for detection of nerve structures in regional anesthesia. During ultrasound-guided blockade, to identify anatomical structures is crucial but can be challenging. In clinical practice, we find a wide difference in the visibility score of the sciatic nerve (SN) through different approaches. Read More

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Illustrating changes in landscapes of passing opportunities along a set of competitive football matches.

Sci Rep 2021 May 7;11(1):9792. Epub 2021 May 7.

CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, 1495-751, Cruz Quebrada, Portugal.

This study aims to illustrate the landscape of passing opportunities of a football team across a set of competitive matches. To do so positional data of 5 competitive matches was used to create polygons of pass availability. Passes were divided into three types depending on the hypothetical threat they may pose to the opposing defense (penetrative, support, and backwards passes). Read More

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Mechanical Thrombectomy in Stroke. Experience from Switching from Stent Retriever Only to Stent Retriever Combined with Aspiration Catheter.

J Clin Med 2021 Apr 21;10(9). Epub 2021 Apr 21.

Department of Neurosurgery and Neurology, Faculty of Health Sciences, Nicolaus Copernicus University in Toruń, Ludwik Rydygier Collegium Medicum, Ujejskiego 75 Street, 85-168 Bydgoszcz, Poland.

Endovascular treatment is a rapidly evolving technique; therefore, there is a constant need to evaluate this method and its modifications. This paper discusses a single-center experience and the results of switching from the stent retriever only (SO) mechanical thrombectomy (MT) to the combined approach (CA), with a stent retriever and aspiration catheters.

Methods: The study involved a retrospective analysis of 70 patients undergoing MT with the use of either SO or CA. Read More

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Syringe-Free, Long-Axis in-Plane Versus Short-Axis Classic out-of-Plane Approach for Ultrasound-Guided Internal Jugular Vein Catheter Placement in Critically Ill Children: A Prospective Randomized Study.

J Cardiothorac Vasc Anesth 2021 Mar 26. Epub 2021 Mar 26.

Clinical Research, Development and Design Application and Research Center, Ataturk University School of Medicine, Erzurum, Turkey; Department of Anesthesiology and Reanimation, Ataturk University School of Medicine, Erzurum, Turkey.

Objective: Although pediatric central venous catheterization is performed using ultrasound guidance, it is still a challenge. This study aimed to investigate the efficacy of the syringe-free, long-axis in-plane approach and compared the short-axis classic out-of-plane approach for ultrasound-guided central venous catheter placement in critically ill pediatric patients.

Design: Prospective randomized study. Read More

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Short distance from the keel to the posterior tibial cortex is associated with fracture after cementless Oxford UKA in Asian patients.

Knee Surg Sports Traumatol Arthrosc 2021 Apr 7. Epub 2021 Apr 7.

Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, chuo-ku, Kobe, 650-0017, Japan.

Purpose: Tibial plateau fractures are serious complications of Oxford mobile-bearing unicompartmental knee arthroplasty (OUKA). This study examined where the fracture lines arises and evaluated the keel-cortex distances (KCDs) using three-dimensional computed tomography (3D-CT) and the effects of technical error (assessed by tibial component positions) and proximal tibial morphology on the KCDs.

Methods: This retrospective study included 217 OUKAs with cementless tibial components. Read More

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Comparison of contrast-enhanced ultrasound versus conventional ultrasound-guided percutaneous nephrolithotomy in patients with nondilated collecting system: a randomized controlled trial.

Eur Radiol 2021 Feb 26. Epub 2021 Feb 26.

Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.

Objective: To compare the safety, effectiveness, and feasibility of contrast-enhanced ultrasound (CEUS) versus conventional ultrasound-guided percutaneous nephrolithotomy (PCNL) in patients with nondilated collecting system.

Methods: Between July 2018 and July 2020, 160 kidney stone patients with nondilated collecting system planned for PCNL were randomly assigned into two groups, CEUS with retrograde ureteral contrast injection and conventional ultrasound with retrograde ureteral normal saline injection. Patient's demographics, the success rate of puncture, success rate of a single-needle puncture, number of punctures, puncture time, perioperative outcomes, stone-free rate, and incidence of complications were compared. Read More

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February 2021

Clot Meniscus Sign: An Angiographic Clue for Choosing between Stent Retriever and Contact Aspiration in Acute Basilar Artery Occlusion.

AJNR Am J Neuroradiol 2021 Feb 4. Epub 2021 Feb 4.

Department of Radiology (B.M.K., K.H., D.J.K.), Yonsei University College of Medicine, Seoul, Korea

Background And Purpose: The efficacy of mechanical thrombectomy methods may differ depending on the characteristics of the occlusion. The purpose of this study was to compare the recanalization efficacy and treatment outcome of a stent retriever versus contact aspiration in patients with acute basilar artery occlusion according to the angiographic characteristics of the occlusion.

Materials And Methods: One hundred sixty-one patients with acute basilar artery occlusion who underwent mechanical thrombectomy were retrospectively analyzed. Read More

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February 2021

Feasibility and safety of the strategy of first stenting without retrieval using Solitaire FR as a treatment for emergent large-vessel occlusion due to underlying intracranial atherosclerosis.

J Neurosurg 2021 Jan 29:1-9. Epub 2021 Jan 29.

Objective: The optimal treatment for underlying intracranial atherosclerosis (ICAS) in patients with emergent large-vessel occlusion (ELVO) remains unclear. Reocclusion during endovascular treatment (EVT) occurs frequently (57.1%-77. Read More

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January 2021

Endoscopic ultrasound (EUS)-guided fine needle biopsy alone vs. EUS-guided fine needle aspiration with rapid onsite evaluation in pancreatic lesions: a multicenter randomized trial.

Endoscopy 2021 Jan 27. Epub 2021 Jan 27.

Division of Gastroenterology and Hepatology, Royal Alexandra Hospital, University of Alberta, Edmonton, Alberta, Canada.

Background:  Endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) is the standard in the diagnosis of solid pancreatic lesions, in particular when combined with rapid onsite evaluation of cytopathology (ROSE). More recently, a fork-tip needle for core biopsy (FNB) has been shown to be associated with excellent diagnostic yield. EUS-FNB alone has however not been compared with EUS-FNA + ROSE in a large clinical trial. Read More

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January 2021

Health economic impact of first-pass success among patients with acute ischemic stroke treated with mechanical thrombectomy: a United States and European perspective.

J Neurointerv Surg 2020 Dec 21. Epub 2020 Dec 21.

Departments of Radiology and Neurology, AZ Groeninge, Kortrijk, Belgium.

Background: First-pass effect (FPE), restoring complete or near complete reperfusion (modified Thrombolysis in Cerebral Infarction (mTICI) 2c-3) in a single pass, is an independent predictor for good functional outcomes in the endovascular treatment of acute ischemic stroke. The economic implications of achieving FPE have not been assessed.

Objective: To assess the economic impact of achieving complete or near complete reperfusion after the first pass. Read More

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December 2020

Per-pass analysis of acute ischemic stroke clots: impact of stroke etiology on extracted clot area and histological composition.

J Neurointerv Surg 2020 Dec 9. Epub 2020 Dec 9.

Department of Interventional and Diagnostic Neuroradiology, Sahlgrenska University Hospital, Göteborg, Sweden.

Background: Initial studies investigating correlations between stroke etiology and clot composition are conflicting and do not account for clot size as determined by area. Radiological studies have shown that cardioembolic strokes are associated with shorter clot lengths and lower clot burden than non-cardioembolic clots.

Objective: To report the relationship between stroke etiology, extracted clot area, and histological composition at each procedural pass. Read More

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December 2020

A Two-Stage Method for Target Searching in the Path Planning for Mobile Robots.

Sensors (Basel) 2020 Dec 3;20(23). Epub 2020 Dec 3.

School of Transportation Science and Engineering, Beihang University, Beijing 100193, China.

The path planning for target searching in mobile robots is critical for many applications, such as warehouse inspection and caring and surveillance for elderly people in the family scene. To ensure visual complete coverage from the camera equipped in robots is one of the most challenging tasks. To tackle this issue, we propose a two-stage optimization model to efficiently obtain an approximate optimal solution. Read More

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December 2020

Effect of manual aspiration thrombectomy using large-bore aspiration catheter for acute basilar artery occlusion: comparison with a stent retriever system.

BMC Neurol 2020 Nov 30;20(1):434. Epub 2020 Nov 30.

Department of Radiology, Ajou University School of Medicine, Ajou University Medical Center, Suwon, South Korea.

Background: A large-bore aspiration catheter can be employed for recanalization of acute basilar artery occlusion. Here we compare the results of mechanical thrombectomy using a stent retriever (SR) and manual aspiration thrombectomy (MAT) using a large-bore aspiration catheter system as a first-line recanalization method in acute basilar artery occlusion (BAO).

Methods: The records of 50 patients with acute BAO who underwent mechanical thrombectomy were retrospectively reviewed. Read More

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November 2020

An exclusive fine-needle biopsy approach to sampling solid lesions under EUS guidance: a prospective cohort study.

Gastroenterol Rep (Oxf) 2020 Oct 15;8(5):349-354. Epub 2020 Apr 15.

Division of Gastroenterology and Hepatology, Department of Internal Medicine, Indiana University School of Medicine, Indianapolis, IN, USA.

Background: Endoscopic ultrasound-guided fine-needle biopsy (EUS-FNB) is increasingly utilized to enhance the cytological yield of sampling solid lesions, but its superiority over existing fine-needle aspiration (FNA) platforms has not been clearly demonstrated. The aim of our study was to compare the diagnostic accuracy and procedural outcomes of FNB using a new Franseen-tip needle to that of a traditional FNA in sampling solid lesions under EUS guidance.

Methods: Consecutive patients with solid lesions referred for EUS-FNB sampling were included. Read More

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October 2020

Landmark-guided versus modified ultrasound-assisted Paramedian techniques in combined spinal-epidural anesthesia for elderly patients with hip fractures: a randomized controlled trial.

BMC Anesthesiol 2020 09 28;20(1):248. Epub 2020 Sep 28.

Department of Anesthesiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, Guangdong, China.

Background: Combined spinal-epidural (CSE) anesthesia is considerably challenging for elderly patients with hip fractures due to spine degeneration and limitations in positioning. This study aimed to investigate the ability of a modified preprocedural ultrasound-guided technique to improve the success rate and efficacy of CSE anesthesia for elderly patients with hip fractures.

Methods: This prospective, single-blinded, parallel-group randomized controlled trial included 80 patients (aged ≥65 years) who were scheduled for elective hip fracture surgery with CSE anesthesia. Read More

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September 2020

Two-Year Clinical and Radiographic Outcomes of Expandable Interbody Spacers Following Minimally Invasive Transforaminal Lumbar Interbody Fusion: A Prospective Study.

Int J Spine Surg 2020 Aug 31;14(4):518-526. Epub 2020 Jul 31.

Globus Medical Inc, Audubon, Pennsylvania.

Background: The advantages of minimally invasive surgery for transforaminal lumbar interbody fusion (MIS TLIF) are well documented and include decreased blood loss, shorter length of hospital stay, and reduced perioperative costs. Clinical evidence for the use of expandable interbody spacers in conjunction with MIS TLIF, however, is scarce. This study sought to examine the clinical and radiographic outcomes of patients undergoing MIS TLIF with an expandable spacer. Read More

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Ultrasound-Guided Portal Vein Access and Percutaneous Wire Placement in the Portal Vein Are Associated With Shorter Procedure Times and Lower Radiation Doses During TIPS Placement.

AJR Am J Roentgenol 2021 05 29;216(5):1291-1299. Epub 2020 Jul 29.

Department of Radiology, Division of Interventional Radiology, University of Minnesota, 420 Delaware St SE, Minneapolis, MN 55455.

TIPS placement is an effective method for treating a number of complications of portal hypertension. Although this complex procedure has been firmly established in treatment algorithms, more data are needed to determine the most efficient and safest ways to perform the procedure. The purpose of this study was to determine the effect of three different techniques of portal vein (PV) cannulation during TIPS placement on procedure efficiency. Read More

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Time Passes Slowly When You Are Concealing Something.

Biol Psychol 2020 09 22;155:107932. Epub 2020 Jul 22.

Graduate School of Human Sciences, Osaka University, Suita, Japan. Electronic address:

The item to be concealed elicits greater physiological arousal than other items. Since high physiological arousal causes an overestimation of time, the display duration of an item is expected to be perceived as longer when people intend to conceal it. After stealing and concealing one item, 36 university students were asked to judge the display duration of an item as shorter than, equal to, or longer than a memorised duration of 2 s. Read More

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September 2020

Ultrasound- Versus CT-Guided Subpleural Lung and Pleural Biopsy: An Analysis of Wait Times, Procedure Time, Safety, and Diagnostic Adequacy.

Can Assoc Radiol J 2020 Jul 16:846537120939073. Epub 2020 Jul 16.

Department of Radiology, McMaster University, St. Joseph's Healthcare Hamilton, Hamilton, Ontario, Canada.

Purpose: To compare the wait times, safety, and diagnostic adequacy of computed tomography (CT)-guided percutaneous lung biopsies with ultrasound (US) guidance for subpleural lung and pleural lesions.

Methods: Consecutive CT- and US-guided biopsies performed at our institution between January 2018 and January 2019 were retrospectively reviewed. Biopsy wait times, lesion size, degree of pleural contact, procedure duration, number of needle passes, complications, and pathologic diagnosis were recorded and compared. Read More

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Mechanical thrombectomy in patients with acute cancer-related stroke: is the stent retriever alone effective?

J Neurointerv Surg 2021 Apr 25;13(4):318-323. Epub 2020 Jun 25.

Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Republic of Korea.

Background: The optimal first-line mechanical thrombectomy (MT) method in cancer-related stroke (CRS) patients with emergent large vessel occlusion (ELVO) remains largely unknown. The aim of this study is to evaluate the efficacy and safety between contact aspiration (CA) first-line thrombectomy and stent retriever (SR) first-line thrombectomy in CRS patients.

Methods: Sixty-two CRS patients with ELVO, who underwent MT between January 2013 and October 2019 at our institution, were retrospectively analyzed. Read More

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Impacts of in-hospital workflow on functional outcome in stroke patients treated with endovascular thrombectomy.

J Thromb Thrombolysis 2021 Jan;51(1):203-211

Department of Neurology, Jinling Hospital, Medical School of Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu, China.

High-performance in-hospital workflow may save time and improve the efficacy of thrombectomy in patients with acute ischemic stroke. However, the optimal in-hospital workflow is far from being formulated, and the current models varied distinctly among centers. This study aimed to evaluate the impacts of in-hospital workflow on functional outcomes after thrombectomy. Read More

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January 2021

Cryopreservation of lipoaspirates: in vitro measurement of the viability of adipose-derived stem cell and lipid peroxidation.

Int Wound J 2020 Oct 11;17(5):1282-1290. Epub 2020 May 11.

Department of Plastic and Reconstructive Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea.

As the storage time of the fat tissue passes by, lipid peroxidation and creation of by-products may take place. The objective of this study was to evaluate the cell viability and functional changes of adipose-derived stem cells (ADSCs) in the cryopreserved lipoaspirates at different temperatures in accordance with lipid peroxidation. Lipoaspirates acquired from liposuction were divided into four different temperature groups and stored at 4°C, -20°C, -80°C, and -196°C. Read More

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October 2020

Extreme weather events recorded by daily to hourly resolution biogeochemical proxies of marine giant clam shells.

Proc Natl Acad Sci U S A 2020 03 16;117(13):7038-7043. Epub 2020 Mar 16.

State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, 710061 Xi'an, China.

Paleoclimate research has built a framework for Earth's climate changes over the past 65 million years or even longer. However, our knowledge of weather-timescale extreme events (WEEs, also named paleoweather), which usually occur over several days or hours, under different climate regimes is almost blank because current paleoclimatic records rarely provide information with temporal resolution shorter than monthly scale. Here we show that giant clam shells ( spp. Read More

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Fork-tip needle biopsy versus fine-needle aspiration in endoscopic ultrasound-guided sampling of solid pancreatic masses: a randomized crossover study.

Endoscopy 2020 06 11;52(6):454-461. Epub 2020 Mar 11.

Department of Cellular Pathology, Royal Victoria Infirmary, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom.

Background: A novel fork-tip fine-needle biopsy (FNB) needle has recently been introduced for endoscopic ultrasound (EUS)-guided sampling. The aim of this study was to compare the performance of fork-tip FNB histology and standard fine-needle aspiration (FNA) cytology in the diagnosis of solid pancreatic masses.

Methods: A randomized crossover study was performed in patients referred for EUS-guided sampling. Read More

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Large eddy simulation of vehicle emissions dispersion: Implications for on-road remote sensing measurements.

Environ Pollut 2020 Apr 11;259:113974. Epub 2020 Jan 11.

Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, NSW, 2007, Australia; Faculty of Science and Technology, Technological and Higher Education Institute of Hong Kong, Hong Kong, China. Electronic address:

On-road remote sensing technology measures the concentration ratios of pollutants over CO in the exhaust plume in half a second when a vehicle passes by a measurement site, providing a rapid, non-intrusive and economic tool for vehicle emissions monitoring and control. A key assumption in such measurement is that the emission ratios are constant for a given plume. However, there is a lack of study on this assumption, whose validity could be affected by a number of factors, especially the engine operating conditions and turbulence. Read More

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Single- versus double-injection costoclavicular block: a randomized comparison.

Reg Anesth Pain Med 2020 03 14;45(3):209-213. Epub 2020 Jan 14.

Anesthesiology, McGill University, Montreal, Québec, Canada.

Background: The costoclavicular approach targets the brachial plexus in the proximal infraclavicular fossa, where the lateral, medial, and posterior cords are tightly bundled together. This randomized trial compared single- and double-injection ultrasound-guided costoclavicular blocks. We selected onset time as the primary outcome and hypothesized that, compared with its single-injection counterpart, the double-injection technique would result in a swifter onset. Read More

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A cohort study of anatomical landmark-guided midline versus pre-procedure ultrasound-guided midline technique of spinal anesthesia in elderly patients undergoing orthopedic surgery.

J Anaesthesiol Clin Pharmacol 2019 Oct-Dec;35(4):522-527

Department of Anaesthesia, SETH GSMC and KEM Hospital, Parel, Mumbai, Maharashtra, India.

Background And Aims: The primary objective of the study was to compare the number of attempts and number of passes of spinal needle insertion and secondary objective was to compare complications, bloody tap, and patient discomfort in anatomical landmark-guided versus pre-procedure USG-guided midline technique of spinal anesthesia in elderly patients posted for orthopedic surgery.

Material And Methods: In this a prospective observational cohort study, 60 patients of either sex, ASA grades I-III, and aged more than 65 years were randomly allocated to 2 groups of 30 patients each. In group AG (Anatomical landmark guided), standard landmark technique was used. Read More

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January 2020

Thrombectomy-Related Emboli: Direct Aspiration versus Stent Retriever Thrombectomy for Acute Ischemic Stroke: Our Experience and Literature Review.

World Neurosurg 2020 Mar 21;135:e588-e597. Epub 2019 Dec 21.

Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, Zurich, Switzerland.

Objective: Thrombectomy-related emboli (TRE) represent a potentially dangerous complication of thrombectomy procedures for acute ischemic stroke. The aim of this study was to compare the rate of TRE in aspiration thrombectomy (ASP) and stent retriever thrombectomy techniques.

Methods: We retrospectively compared clinical and radiologic outcomes of 2 groups of consecutive patients with stroke, ASP group and SRT group, with TRE rates as the primary study endpoint. Read More

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Preprocedural ultrasound versus landmark techniques for spinal anesthesia performed by novice residents in elderly: a randomized controlled trial.

BMC Anesthesiol 2019 11 11;19(1):208. Epub 2019 Nov 11.

Department of Anesthesiology, American University of Beirut Medical Center, P.O. Box 11-0236, Beirut, Lebanon.

Background: Spinal anesthesia using the midline approach might be technically difficult in geriatric population. We hypothesized that pre-procedural ultrasound (US)-guided paramedian technique and pre-procedural US-guided midline technique would result in a different spinal anesthesia success rate at first attempt when compared with the conventional landmark-guided midline technique in elderly patients.

Methods: In this prospective, randomized, controlled study, one hundred-eighty consenting patients scheduled for elective surgery were randomized into the conventional surface landmark-guided midline technique (group LM), the pre-procedural US-guided paramedian technique (group UP), or the pre-procedural US-guided midline technique (group UM) with 60 patients in each group. Read More

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November 2019