Exoscope-Guided (VITOM 3D) Single-Stage Removal of Supratentorial Cavernous Angioma and Hemangioblastoma: 3-Dimensional Operative Video

2019 ◽  
Vol 17 (4) ◽  
pp. E164-E165 ◽  
Author(s):  
Filippo Flavio Angileri ◽  
Felice Esposito ◽  
Antonino Scibilia ◽  
Stefano Maria Priola ◽  
Giovanni Raffa ◽  
...  
Keyword(s):  
Cavernous Angioma ◽  
Lateral Position ◽  
Single Stage ◽  
Surgical Instruments ◽  
Ethical Standards ◽  
Research Committee ◽  
3 Dimensional ◽  
Surgical Tool ◽  
Set Up ◽  
Temporal Lesion

Abstract This video shows an exoscope-guided single-stage resection with 3-dimensional technology of a supratentorial cavernoma and a supratentorial hemangioblastoma during the same surgical procedure. The patient is a 42-yr-old man with a history of generalized tonico-clonic seizures. Contrast-enhanced magnetic resonance (MR) revealed the presence of a left frontal cavernoma and a left T1 non-enhancing hypointese temporal lesion (hemangioblastoma). The operation was carried out in the lateral position with the sole use of a 3D-exoscope (VITOM-3D, Karl Storz GmbH&Co, Tuttlingen, Germany). The operating room set-up included the surgeons standing at the head of the patients with the operating and navigator screens in the front of them and the exoscope arm entering from the left side. As recently highlighted, the 3D-exoscope carries several advantages: (1) it allows neurosurgeons to operate in a confortable and stable position; (2) it is less space-occupying in comparison to the microscope; (3) the optics and 3D-screen offer an optimal stereoscopic view in comparison to the 2D-exoscope, important for both surgical and training purposes; (4) although sharing with the endoscope, the image quality and confortable surgeon's position, there is no conflict between the surgical instruments and the scope in the surgical field. The adopted strategy enabled a complete resection of both lesions. The postoperative course was uneventful and the patient was seizure-free; the antiepileptic drugs were discontinued 3 mo after surgery. The 3D-exoscope represents a promising surgical tool, which may become part of the neurosurgical armamentarium. Nevertheless, the conceivable capability to improve neurosurgical results will have to be explored. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The patient has consented to the submission of the surgical video for submission to the journal.

Microsurgical Resection of a Solitary Spinal Epidural Cavernous Angioma: 3-Dimensional Operative Video

2018 ◽  
Vol 16 (2) ◽  
pp. E47-E47
Author(s):  
Guilherme H W Ceccato ◽  
Lucélio Henning ◽  
Julyana L Prado ◽  
Marcio S Rassi ◽  
Luis A B Borba
Keyword(s):  
Vascular Malformations ◽  
Surgical Excision ◽  
Cavernous Angioma ◽  
Neurophysiological Monitoring ◽  
Ethical Standards ◽  
Patient Identification ◽  
Research Committee ◽  
En Bloc ◽  
3 Dimensional ◽  
Spinal Epidural

Abstract Solitary spinal epidural cavernous angiomas are rare vascular malformations. Surgical excision is the treatment of choice, as these lesions tend to grow or bleed at some point. In this 3-dimensional, narrated video, we present the case of a 61-year-old male who presented with progressive pain in the right paravertebral region secondary to an epidural cavernous angioma located at the T6/T7 level. Under intraoperative neurophysiological monitoring, a laminectomy between T5 and T7 was performed. A reddish, well delimited, and highly vascularized epidural mass was identified and dissected from the adjacent dura and nerve root, and an en bloc total resection was achieved. The patient was discharged neurologically intact on postoperative day 4, presenting a remarkable improvement of his pain at 2-month follow-up. Total excision of these lesions is possible in most of cases, remaining the standard treatment, with minimum complications.  All procedures were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. All data related to patient identification were removed from this surgical video and manuscript, with no need of a written informed consent.

A simple way for producing holographic filters suitable for image improvement

1978 ◽  
Vol 36 (1) ◽  
pp. 226-227
Author(s):  
K.-H. Herrmann ◽  
E. Reuber ◽  
P. Schiske
Keyword(s):  
Transfer Functions ◽  
Diffraction Order ◽  
Lateral Position ◽  
Simple Method ◽  
Spatial Frequencies ◽  
Resolution Electron ◽  
Wiener Filters ◽  
Image Improvement ◽  
Optical Reconstruction ◽  
Set Up

Aposteriori deblurring of high resolution electron micrographs of weak phase objects can be performed by holographic filters [1,2] which are arranged in the Fourier domain of a light-optical reconstruction set-up. According to the diffraction efficiency and the lateral position of the grating structure, the filters permit adjustment of the amplitudes and phases of the spatial frequencies in the image which is obtained in the first diffraction order.In the case of bright field imaging with axial illumination, the Contrast Transfer Functions (CTF) are oscillating, but real. For different imageforming conditions and several signal-to-noise ratios an extensive set of Wiener-filters should be available. A simple method of producing such filters by only photographic and mechanical means will be described here.A transparent master grating with 6.25 lines/mm and 160 mm diameter was produced by a high precision computer plotter. It is photographed through a rotating mask, plotted by a standard plotter.

Informed consent: Towards improved lay-friendliness of patient information sheets

2014 ◽  
Vol 10 (3) ◽  
pp. 201-211
Author(s):  
Morten Pilegaard ◽  
Hanne Berg Ravn
Keyword(s):  
Informed Consent ◽  
Information Structure ◽  
Language Use ◽  
Ethical Standards ◽  
Structured Interviews ◽  
Explorative Study ◽  
Microsoft Word ◽  
Text Production ◽  
Linguistic Intervention ◽  
Set Up

Regional research ethics committee (REC) members have voiced a need for the linguistic improvement of informed consent documents to ensure duly informed consent and to ease committee deliberation. We have little knowledge of what elements of language use hamper comprehension, or of the extent of medical researchers’ appreciation of this problem and their willingness to accept intervention. This qualitative, explorative study proposes an intervention design and tests its feasibility and acceptability. Semi-structured interviews with potential REC applicants informed a linguistic intervention benchmarked against existing guidelines, mandated locally and nationally, and then evaluated quantitatively in a semi-controlled set-up and qualitatively via questionnaires. Potential applicants professed the psychological acceptability of linguistic intervention. The intervention comprised a downloadable Microsoft Word template outlining information structure, a detailed guideline offering advice for each move and self-selected linguistic screening. It was used by 14 applicants and had a measurable effect on REC deliberation time and approval rates. The intervention instruments overall made it easier for applicants to produce informed consent documents meeting prescribed ethical standards concerning lay-friendliness. In conclusion, it was found that linguistic intervention is relevant, feasible and psychologically acceptable to REC applicants; it aids their text production process and seems to enhance the lay-friendliness of these texts.

Environmental model studies for the Istanbul master plan. Part I: hydrodynamical design basis and marine disposal of wastewater

1995 ◽  
Vol 32 (2) ◽  
pp. 141-148 ◽  
Author(s):  
I. S. Hansen ◽  
H. J. Vested ◽  
M. A. Latif
Keyword(s):  
Black Sea ◽  
Layer Structure ◽  
The Black Sea ◽  
Marmara Sea ◽  
Junction Area ◽  
3 Dimensional ◽  
Model Studies ◽  
Model Set ◽  
Characteristic Features ◽  
Set Up

A modelling study of the hydrodynamics and spreading of wastewater from existing and future outfalls in the Bosphorus region has been conducted applying a 3-Dimensional model. The modelling is based on SYSTEM 3, which is a general modelling system for baroclinic flow simulating unsteady currents, waterlevels, salinity and temperature within the model area. The model set-up covers the Black Sea-Bosphorus-Marmara Sea junction area. The set-up is calibrated by data from a dedicated field program and previous field experience. The model is designed to describe the characteristic features of the flow in the junction area such as the effects of variations in waterlevel differences between the Sea of Marmara and the Black Sea on the important two-layer structure in the strait and the flow fields generated by the upper layer jet in the Bosphorus-Marmara junction. This model has been applied for evaluation of disposal of wastewater and for the subsequent water quality studies. The general use of a baroclinic 3-D hydrodynamic model to simulate disposal of wastewater is discussed. Examples of the application of the model of the junction area to evaluate the different strategies for disposal of wastewater are presented.

A Most Active Customer

2014 ◽  
Vol 44 (5) ◽  
pp. 470-502 ◽  
Author(s):  
Simone Turchetti
Keyword(s):  
World War Ii ◽  
Nuclear Power ◽  
Atomic Energy Commission ◽  
Developed Countries ◽  
Atomic Energy ◽  
Peace Treaty ◽  
Research Committee ◽  
Energy Field ◽  
Set Up ◽  
The U.S

After World War II had ended, Italy, not unlike other developed countries, held the ambition to establish an atomic energy program. The Peace Treaty of 1947 forbade its administration from seeking to acquire atomic weaponry, but in 1952 a national research committee was set up to explore the peaceful uses of atomic energy, in particular with regard to building nuclear reactors. One of the committee’s goals was to use nuclear power to make the country less reliant on foreign energy provisions. Yet, this paper reveals that the atomic energy project resulted in actually increasing Italy’s dependence on overseas assistance. I explain the reasons for this outcome by looking at the unfolding of U.S.–Italy relations and the offers of collaboration in the atomic energy field put forth by the U.S. State Department and the U.S. Atomic Energy Commission. I argue that these offers undermined plans to shape the nuclear program as its Italian architects had envisioned, caused them to reconsider the goal of self-sufficiency in energy provisioning, and reconfigured the project to be amenable to the security and economic priorities of the U.S. administration. In this way, I conclude, the path for the Italian project to “de-develop” was set.

Ethics and E-Marketing

2015 ◽  
pp. 1873-1885
Author(s):  
Jim Codling
Keyword(s):  
Developing Countries ◽  
Cultural Norms ◽  
Ethical Standards ◽  
Starting Point ◽  
Common Practices ◽  
Cultural Standards ◽  
Set Up ◽  
Use Of Internet

The use of electronics has made old standards obsolete or at least “Passé.” Therefore, the question of ethics in the use of electronics has not been addressed very well. Common practices are forgotten as well as privacy and separation of work and down time. What this chapter entertains is to set up standards by which the entrepreneur can make best use of e-marketing, use of Internet, e-mails, and other electronic processes that can be used for commerce, while being sensitive to the standards that exist in differing societies and cultures. A starting point must be in distinguishing the needs and cultural standards between developed and developing countries. Another consideration must be the cultural norms of people who live in different places to include religions and moral/ethical standards.

Sherrington and industrial fatigue

1984 ◽  
Vol 39 (1) ◽  
pp. 91-104 ◽  
Keyword(s):  
Medical Research ◽  
The Other ◽  
Research Committee ◽  
National Insurance ◽  
Economic Necessity ◽  
Set Up

In September 1915 the Minister of Munitions, David Lloyd George, O.M. (1863—1945), set up the Health of Munition Workers Committee at the instigation of his Parliamentary Secretary, Dr Christopher Addison (1869—1951), who succeeded him as Minister in 1916 and in 1919 became the first Minister of Health (one of three medically qualified holders of this once important post, the other two being Walter Elliot and David Owen) (1). The Committee included Dr Walter Fletcher, F.R.S. (1873—1933), who in 1914 became the first Secretary of the Medical Research Committee at the suggestion of Dr T. R. Elliott, F.R.S. (1877—1961), the Committee having been established the previous year under Lloyd George’s National Insurance Act of 1911; Dr Leonard Hill, F.R.S. (1866—1952) was also a member. It may be mentioned that the Committee published in 1918 a report on the dietaries of munition workers (2) by Viscount Dunluce (1878—1932) and Capt. Major Greenwood, F.R.S. (1880—1949) which concluded: ‘The present provision of so many calories from fat and meat as could be made six months ago is no longer feasible. Fortunately, economic necessity and the teaching of physiology, however tentative the latter may be, do seem to point in the same direction. The substitution of energy derived from potatoes and cereals for a large portion of that yielded by fats and animal proteins would be a change that cannot scientifically be condemned’. This has been recently rediscovered by the NACNE Report (3).

scholarly journals LOW-COST SIMULATOR ASSEMBLY FOR 3-DIMENSIONAL VIDEOSURGERY TRAINING

2018 ◽  
Vol 31 (3) ◽  
Author(s):  
Carlos Magno Queiroz da CUNHA ◽  
Douglas Marques Ferreira de LIMA ◽  
Francisco Julimar Correia de MENEZES
Keyword(s):  
Low Cost ◽  
Three Dimensional ◽  
Skills Training ◽  
Surgical Skills ◽  
3D Video ◽  
Training Methods ◽  
3 Dimensional ◽  
Set Up ◽  
Undergraduate Programs ◽  
Advanced Courses

ABSTRACT Background: Three-dimensional videosurgery is already a reality worldwide. The trainee program for this procedure should be done initially and preferably in simulators. Aim: Assemble low-cost simulator for three-dimensional videosurgery training. Methods: The simulator presented here was mounted in two parts, base and glasses. After, several stations can be inserted into the simulator for skills training in videosurgery. Results: It was possible to set up three dimensional (3D) video simulations with low cost. It has proved to be easy to assemble and allows the training surgeon of various video surgical skills. Conclusion: This equipment may be used in undergraduate programs and advanced courses for residents and surgeons. The acrylic box allows the visualization of the task executed by the tutor and even by other experienced students.

Extract from A Wrack Behind

1999 ◽  
Vol 103 (1022) ◽  
pp. 214
Author(s):  
Norton Lord Kings
Keyword(s):  
Vice President ◽  
The Other ◽  
Research Committee ◽  
Board Of Governors ◽  
The World ◽  
The Government ◽  
To Come ◽  
Aeronautical Science ◽  
Set Up ◽  
Aircraft Production

In 1943, with the world still at war, a great discussion on the future of aeronautical education was held by the Royal Aeronautical Society. Not only would the war years, however many were still to come, demand more well-qualified aeronautical engineers, but the longed for peace years, with engineers turning swords into ploughshares, would want more. The discussion was in two parts. One took place on 25 June and the other on 23 July. Many of the leading figures in British aeronautics took part and in the chair on both occasions was Dr Roxbee Cox, a vice-president of the society. The discussion culminated in a resolution based on a proposal by Marcus Langley. That resolution and the discussion which led to it resulted in the recommendation by the Aeronautical Research Committee that a post-graduate college of aeronautical science should be established. This was followed by governmental action. Sir Stafford Cripps, then the minister responsible for aircraft production, set up a committee presided over by Sir Roy Fedden to make specific proposals, and the committee recommended in its 1944 report that such a college should be a new and independent establishment. In 1945 the government created the College of Aeronautics board of governors under the chairmanship of Air Chief Marshal Sir Edgar Ludlow-Hewitt to bring the college into existence and govern it. The first meeting of this board took place on 28 June 1945 and there were present: Sir Edgar Ludlow Hewitt, Dr W. Abbot, Mr Hugh Burroughs, Sir Roy Fedden, Mr J. Ferguson, Sir Harold Hartley, Sir William Hil-dred, Sir Melvill Jones, Dr E.B. Moullin, Mr J.D. North, Sir Frederick Handley Page, Mr E.F. Relf, Dr H. Roxbee Cox, Air Marshal Sir Ralph Sovley, Rear Admiral S.H. Troubridge and Mr W.E.P. Ward. Sir William Stanier, who had been appointed, was not present.

Three Dimensional, Linear and Nonlinear Finite Element Modeling of FRP to Concrete Pull-Off Test

2011 ◽  
Vol 147 ◽  
pp. 92-98
Author(s):  
Majid Noori Hamedani
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Three Dimensional ◽  
Nonlinear Finite Element ◽  
Rc Structures ◽  
Bond Behavior ◽  
3 Dimensional ◽  
Reinforced Polymer ◽  
Concrete Layer ◽  
Set Up

External bonding of fiber reinforced polymer (FRP) sheets to concrete is a popular method of strengthening reinforced concrete (RC) structures. A simple test was set-up in order to simulate the process of debonding in this type of strengthening. The set-up is simulating the bond behavior of strengthened RC structures. In the recent researches it was found out that bond behavior and actual stress distribution is a 3 dimensional phenomenon. This paper is presenting more details about pull-off tests by applying 3-D and nonlinear finite element models. As a first step linear model has been generated to show general stress distribution in the test, in a second step nonlinear model is implemented in order to predict the behavior of pull-off tests more accurately. Tests have shown that at ultimate load, deboning occurs within a concrete layer near the bond surface. Therefore, the paper is focusing on using a more realistic concretebehavior in the model.

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