20,671 results match your criteria describes technique


In vivo 3D Power Doppler Imaging Using Continuous Translation and Ultrafast Ultrasound.

IEEE Trans Biomed Eng 2021 Jul 29;PP. Epub 2021 Jul 29.

The introduction of ultrafast ultrasound and spatiotemporal filtering has significantly improved the sensitivity of Doppler ultrasound imaging. This work describes the development of a novel 3D power Doppler imaging technique which uses a 1D-array ultrasound probe that mechanically translates at a constant speed. The continuous translation allows for a fast scan of a large 3D volume without requiring complex hardware. Read More

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Glue, Onyx, Squid or PHIL? Liquid Embolic Agents for the Embolization of Cerebral Arteriovenous Malformations and Dural Arteriovenous Fistulas.

Clin Neuroradiol 2021 Jul 29. Epub 2021 Jul 29.

Department of Neuroradiology, Heidelberg University Hospital, INF 400, 69120, Heidelberg, Germany.

Background: Endovascular embolization is an effective treatment option for cerebral arteriovenous malformations (AVMs) and dural arteriovenous fistulas (DAVFs). A variety of liquid embolic agents have been and are currently used for embolization of AVMs and DAVFs. Knowledge of the special properties of the agent which is used is crucial for an effective and safe embolization procedure. Read More

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The SIC protocol: A seven-step strategy to minimize complications potentially related to the insertion of centrally inserted central catheters.

J Vasc Access 2021 Jul 29:11297298211036002. Epub 2021 Jul 29.

Catholic Medical Center - Upper Connecticut Valley Hospital, Colebrook, NH, USA.

Insertion of central venous catheters in the cervico-thoracic area is potentially associated with the risk of immediate/early untoward events, some of them negligible (repeated punctures), some relevant (accidental arterial puncture), and some severe (pneumothorax). Furthermore, different strategies adopted during insertion may reduce or increase the incidence of late catheter-related complications (infection, venous thrombosis, dislodgment). This paper describes a standardized protocol (S. Read More

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A novel approach of combining the tunnel technique with a double papilla flap or a coronally positioned flap for the treatment of multiple adjacent gingival recessions: report of two cases.

Int J Esthet Dent 2021 Aug;16(3):338-348

The treatment of multiple gingival recessions (GRs) is often challenging for clinicians, mainly due to a larger avascular surface, limited blood supply, differences in recession depth, and residual keratinized tissue. Considering these factors, it may be prudent to take advantage of one surgical technique and overcome its limitations by combining it with another technique in certain clinical situations. The present clinical report describes the treatment of multiple GRs of different depths with a combination of the tunnel technique (TUN) and pedicle flap (PED) - double papilla flap (DPF) or coronally positioned flap (CPF) - in conjunction with deepithelialized connective tissue grafts in two patients. Read More

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The injectable composite resin technique: biocopy of a natural tooth - advantages of digital planning.

Int J Esthet Dent 2021 Aug;16(3):280-299

The injectable composite resin technique is a minimally invasive and purely additive procedure that uses a transparent silicone index and flowable composite resin to translate the restorative plan from the wax-up to the final restoration. Its minimally invasive nature means that it can preserve tooth structure as it may not require hard tissue reduction. It is also an indirect/direct molding technique that allows the clinician to perform a direct restoration based on a proper analysis and planning. Read More

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Reimplantation valve-sparing aortic root replacement is the most durable approach to facilitate aortic valve repair.

Authors:
Tirone David

JTCVS Tech 2021 Jun 28;7:72-78. Epub 2021 Jan 28.

Division of Cardiac Surgery of University Health Network, Peter Munk Cardiac Centre and the University of Toronto, Toronto, Ontario, Canada.

Reimplantation of the aortic valve has been performed for 3 decades, and experience shows that patient selection and meticulous operative technique are crucial to provide excellent clinical outcomes and stable aortic valve function for decades. More than the type of the Dacron graft used for the reimplantation (straight graft or Valsalva graft), we believe that attention to certain technical aspects of this operation is key to a successful and durable aortic valve reconstruction. This article describes the operative procedure as we believe it should be performed based on a learned experience with several hundred cases and summarizes the latest outcomes in a large cohort of patients followed prospectively during the past 3 decades. Read More

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Novel Techniques to Crossing a Severely Stenotic Aortic Valve.

JACC Case Rep 2019 Dec 18;1(5):848-852. Epub 2019 Dec 18.

Bristol Heart Institute, University Hospitals Bristol NHS Foundation Trust, Bristol Royal Infirmary, Bristol, United Kingdom.

This report presents 2 cases with the use of different techniques to facilitate aortic valve crossing during transcatheter aortic valve replacement with a balloon-expandable system. Case 1 involves a balloon cushion technique with an Edwards Sapien 3 valve (Edwards Lifesciences), and case 2 describes successful crossing and implantation using a buddy balloon technique with an Edwards Sapien Ultra valve. (). Read More

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December 2019

Stuck Between a Rock and a Hard Place: Management of an Entrapped Rotablator Burr.

JACC Case Rep 2019 Dec 18;1(5):771-773. Epub 2019 Dec 18.

Department of Medicine, Montreal Heart Institute, Montreal, Quebec, Canada.

Burr entrapment remains a serious complication of rotational atherectomy. This report describes an advanced technique for the management of entrapped atherectomy burrs. Commonly strategies were unsuccessful. Read More

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December 2019

Tear of Posterior Mitral Valve Leaflet During MitraClip, Successful Bailout Using Vascular Plugs.

JACC Case Rep 2019 Aug 21;1(2):197-201. Epub 2019 Aug 21.

Adult Cardiology Department, Madina Cardiac Centre, Madina, Saudi Arabia.

This case report describes a novel bailout technique (TAIBA technique) used in a MitraClip procedure that was complicated by a tear of the posterior mitral valve leaflet and caused torrential mitral regurgitation (MR). This is the first case report in which Amplatzer vascular plugs were used to treat severe MR after a tear in the posterior leaflet occurred during a MitraClip procedure. (). Read More

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4-Dimensional Velocity Mapping Cardiac Magnetic Resonance of Extracardiac Bypass for Aortic Coarctation Repair.

JACC Case Rep 2019 Jun 4;1(1):17-20. Epub 2019 Jun 4.

Gabriele Monasterio Tuscany Foundation, Pisa and Massa, Italy.

This report describes a case of a young lady who, following extracardiac bypass between ascending and descending aorta for severe aortic coarctation, underwent 4-dimensional flow cardiac magnetic resonance, a technique that, by 3-dimensional flow assessment over time (4-dimensional), allows not only quantification of flows but also wall shear stress. In this case, increased wall shear stress was observed in the conduit's acute angle (kinking) as well as at the distal anastomosis level. The authors postulate that increased wall shear stress could help identify and risk stratify adult congenital heart disease who could develop vascular complications in the future. Read More

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Grice subtalar arthrodesis of bilateral adult flatfoot in a professional dancer: a case report.

Acta Biomed 2021 Jul 26;92(S3):e2021003. Epub 2021 Jul 26.

Orthopaedics and Traumatology Clinic, Department of Medicine and Surgery, University of Parma, Parma, Italy.

Background And Aim: Adult acquired flatfoot deformity (AAFD) is a common pathology and an important cause of pain and disability. This deformity causes a progressive flattening of the foot arch which has traditionally been associated with posterior tibialis tendon (PTT) dysfunction. Operative treatment is indicated after the failure of conservative management aiming to achieve proper alignment of the hindfoot and to maintain as much flexibility as possible. Read More

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Cementless reverse total shoulder arthroplasty in a patient affected by Osteogenesis Imperfecta: a case report and review of the literature.

Acta Biomed 2021 Jul 26;92(S3):e2021024. Epub 2021 Jul 26.

Clinica Ortopedica - ASUFC - Udine, Italy DAME - University of Udine, Italy.

Background And Aim Of The Work: Osteogenesis Imperfecta is a rare genetic condition. The use of total shoulder arthroplasty in these patients is very uncommon, with only two cases reported in the literature. This study describes a cementless reverse total shoulder arthroplasty (rTSA) for a multi-fragmented fracture in a patient affected by Osteogenesis Imperfecta (OI) type 1 and aims to review literature results of shoulder replacement in patients affected by this uncommon condition. Read More

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A device to facilitate separation of components of combined screw- and cement-retained implant-supported crowns.

J Prosthet Dent 2021 Jul 19. Epub 2021 Jul 19.

Professor, Division of Fixed Prosthodontics, Department of Conservative Dentistry, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.

This article describes a technique to separate parts of cemented implant-supported restorations with a screw hole. A device was designed by using a computer-aided design (CAD) program and was milled in a milling center. The restoration was heated to 400 °C and then subjected to controlled mechanical force with the help of the device to separate the cemented parts. Read More

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A technique to fabricate a custom CAD-CAM periapical radiographic film holder for implant assessment.

J Prosthet Dent 2021 Jul 19. Epub 2021 Jul 19.

Professor, Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, PR China. Electronic address:

Standardized radiographs produced by using the paralleling technique play an important role in monitoring prosthetic misfit and marginal bone levels around endosseous implants. Under clinical conditions, parallel adjustment of the film with respect to the implant requires the use of positioning devices. This article describes the fabrication of a custom computer-aided design and computer-aided manufacturing (CAD-CAM) device suitable for implants adjacent to natural teeth. Read More

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Novel technique in atraumatic retraction for minimally invasive low anterior resection.

ANZ J Surg 2021 Jul 26. Epub 2021 Jul 26.

Department of Colorectal Surgery, Korea University Anam Hospital, Seoul, South Korea.

This study describes an atraumatic minimally invasive retraction system for rectal cancer surgery. Read More

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Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride.

J Vis Exp 2021 Jul 8(173). Epub 2021 Jul 8.

Maryland Quantum Materials Center, Department of Physics, University of Maryland; National Institute of Standards and Technology;

Single crystal specimens of the actinide compound uranium ditelluride, UTe2, are of great importance to the study and characterization of its dramatic unconventional superconductivity, believed to entail spin-triplet electron pairing. A variety in the superconducting properties of UTe2 reported in the literature indicates that discrepancies between synthesis methods yield crystals with different superconducting properties, including the absence of superconductivity entirely. This protocol describes a process to synthesize crystals that exhibit superconductivity via chemical vapor transport, which has consistently exhibited a superconducting critical temperature of 1. Read More

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Current Role of Hysterectomy in Pelvic Floor Surgery: Time for Reappraisal? A Review of Current Literature and Expert Discussion.

Biomed Res Int 2021 6;2021:9934486. Epub 2021 Jul 6.

University of Witten-Herdecke, Germany.

Since hysterectomy could be performed with low risk, it has been part of the standard of surgical prolapse therapy for decades. This has not been scrutinized for a long time. In this review, we describe the development of this issue in recent years. Read More

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Novel technique of extracorporeal intrauterine morcellation after total laparoscopic hysterectomy: Three emblematic case reports.

World J Clin Cases 2021 Jul;9(20):5655-5660

Department of Medical Sciences and Public Health, University of Cagliari, Cagliari 09100, Italy.

Background: In the presence of a large uterus, total laparoscopic hysterectomy (TLH), always requires morcellation to allow removal of the tissues from the abdominal cavity. However, uncontained morcellation has been scrutinized because of the possible spread of occult leiomyosarcoma. Therefore, in-bag extracorporeal morcellation has been developed. Read More

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Monitoring System-Based Flying IoT in Public Health and Sports Using Ant-Enabled Energy-Aware Routing.

J Healthc Eng 2021 1;2021:1686946. Epub 2021 Jul 1.

Department of Information Technology Specialization, FPT University, Hoa Lac High Tech Park, Hanoi, Vietnam.

In recent decades, the Internet of flying networks has made significant progress. Several aerial vehicles communicate with one another to form flying ad hoc networks. Unmanned aerial vehicles perform a wide range of tasks that make life easier for humans. Read More

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Efficient Protoplast Regeneration Protocol and CRISPR/Cas9-Mediated Editing of Glucosinolate Transporter () Genes in Rapeseed ( L.).

Front Plant Sci 2021 7;12:680859. Epub 2021 Jul 7.

Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden.

Difficulty in protoplast regeneration is a major obstacle to apply the CRISPR/Cas9 gene editing technique effectively in research and breeding of rapeseed ( L.). The present study describes for the first time a rapid and efficient protocol for the isolation, regeneration and transfection of protoplasts of rapeseed cv. Read More

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Use of three-dimensional printing for the osteoplastic flap approach: A viable technique.

Med J Armed Forces India 2021 Jul 1;77(3):363-366. Epub 2021 May 1.

Resident (ENT), Army Hospital (R&R), New Delhi, India.

The osteoplastic flap technique is the open and direct approach to the frontal sinus and is especially useful when disease extends laterally into the frontal sinus. One of the vital steps of surgery is delineation of the boundary of the frontal sinus. This can usually be performed either by using the classical 6-ft Caldwell view X-ray template or more recently by application of the image-guided navigation system. Read More

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Low frequency conduction block: a promising new technique to advance bioelectronic medicines.

Authors:
Silvia V Conde

Bioelectron Med 2021 Jul 26;7(1):11. Epub 2021 Jul 26.

iNOVA4Health, CEDOC, NOVA Medical School, NMS, Faculdade Ciências Médicas, Universidade Nova de Lisboa, 1169-056, Lisboa, Portugal.

Nerve conduction block is an appealing way to selective target the nervous system for treating pathological conditions. Several modalities were described in the past, with the kilohertz frequency stimulation generating an enormous interest and tested successfully in clinical settings. Some shortcomings associated with different modalities of nerve blocking can limit its clinical use, as the "onset response", the high demand of energy supply, among others. Read More

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Intra-operative monitoring as an adjuvant to standard vagus nerve stimulation implantation.

Childs Nerv Syst 2021 Jul 23. Epub 2021 Jul 23.

Department of Neurophysiology, Nelson Mandela Children's Hospital, Johannesburg, South Africa.

Purpose: The treatment of refractory epilepsy by vagus nerve stimulation (VNS) is a well-established therapy. Complications following VNS insertion may be procedure-related or stimulation-related. Herein, we describe our technique of intra-operative neuro-monitoring (IONM) in an attempt to diminish these adverse events. Read More

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Applications of PERALS-Alpha Spectrometry for the Investigation of Radionuclides in Water Samples.

Materials (Basel) 2021 Jul 6;14(14). Epub 2021 Jul 6.

State-Laboratory of Basel-City, Kannenfeldstrasse 2, 4056 Basel, Switzerland.

In this paper, experiences of the last 20 years with the PERALS-technique are described. PERALS stands for photo electron-rejecting alpha liquid scintillation. This liquid scintillation technique was developed by Jack McDowell in the 1970s and is a powerful technique for the analyses of many natural alpha nuclides and also the beta nuclide Sr. Read More

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Design and Analysis of Electrodes for Electrostimulation (TENS) Using the Technique of Film Printing and Embroidery in Textiles.

Sensors (Basel) 2021 Jul 13;21(14). Epub 2021 Jul 13.

Institute of Material Science of Textiles and Polymer Composites, Faculty of Material Technologies and Textile Design, Lodz University of Technology, 116 Żeromskiego Street, 90-924 Lodz, Poland.

This article describes the development of transcutaneous nerve stimulating electrodes (TENS) by means of electrically conductive ink and conductive yarn. The scope of work covered a selection of three types of knitwear with a similar surface weight with different raw material composition. Stimulating electrodes were made by means of film printing and machine embroidery. Read More

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New Hydraulic Sensor for Distributed and Automated Displacement Measurements with Temperature Compensation System.

Sensors (Basel) 2021 Jul 8;21(14). Epub 2021 Jul 8.

Reinforced Concrete Structures Division, Faculty of Civil Engineering, Cracow University of Technology, Warszawska 24, 31-155 Krakow, Poland.

Structural health monitoring (SHM) is a challenging task, especially in the context of ground and geotechnical structures. They are characterized by a set of random mechanical parameters, depending on the location but also changing with external conditions (such as humidity or temperature) over time. Theoretical predictions and results of numerical simulations are, therefore, considerably uncertain. Read More

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Reconstruction With Achilles Tendon Allograft Using the Keyhole Technique for Chronic Triceps Insufficiency After Total Elbow Arthroplasty.

Orthopedics 2021 Jul-Aug;44(4):e498-e502. Epub 2021 Jul 1.

Total elbow arthroplasty (TEA) is associated with a relatively high incidence of chronic triceps insufficiency, but there is difficulty in treatment. This case series describes reconstruction with Achilles allografts using the keyhole technique in patients with postoperative chronic triceps insufficiency. Fourteen patients who underwent reconstruction for triceps insufficiency after TEA were included in the study. Read More

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Characterization of Paramagnetic Iron-Sulfur Clusters Using Electron Paramagnetic Resonance Spectroscopy.

Authors:
Troy A Stich

Methods Mol Biol 2021 ;2353:259-280

Department of Chemistry, Wake Forest University, Winston-Salem, NC, USA.

Continuous-wave (CW) electron paramagnetic resonance (EPR) spectroscopy is a powerful ally in characterizing the multitude of redox-active iron-sulfur cluster-containing ([Fe-S]) species present in biological samples. The technique detects only those clusters that are paramagnetic-having a nonzero total electron spin (S > 0)-thus, it can discriminate between clusters in different oxidation states. The low-temperature CW-EPR spectrum of an [Fe-S] yields the three magnetic g-values that serve as a fingerprint of its electronic structure. Read More

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January 2021

MicroRNA and circRNA Expression Analysis in a Zbtb1 Gene Knockout Monoclonal EL4 Cell Line.

Front Cell Infect Microbiol 2021 5;11:706919. Epub 2021 Jul 5.

College of Veterinary Medicine, Jilin Agricultural University, Changchun, China.

Zinc finger and BTB domain containing 1(Zbtb1) is a transcriptional suppressor protein, and a member of the mammalian Zbtb gene family. Previous studies have shown that Zbtb1 is essential for T-cell development. However, the role of Zbtb1 in T-cell lymphoma is undetermined. Read More

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Imaging of In Vitro and In Vivo Neurons in Drosophila Using Stochastic Optical Reconstruction Microscopy.

Curr Protoc 2021 Jul;1(7):e203

Department of Cellular Biology, University of Georgia, Athens, Georgia.

The Drosophila melanogaster brain comprises different neuronal cell types that interconnect with precise patterns of synaptic connections. These patterns are essential for the normal function of the brain. To understand the connectivity patterns requires characterizing them at single-cell resolution, for which a fluorescence microscope becomes an indispensable tool. Read More

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