scholarly journals “Jahwari’s Position” – A Novel Operating Room Setup for Antegrade Humeral Nailing: Surgical Technique and Initial Experience

2021 ◽  
Vol 11 (7) ◽  
Author(s):  
Ahmed Jahwari ◽  
Madhusudhan Ummadisetty ◽  
Mohamed Othman
Keyword(s):  
Radiation Exposure ◽  
Lateral Position ◽  
Contralateral Side ◽  
Primary Objective ◽  
Scrub Nurse ◽  
Optimal Position ◽  
X Ray ◽  
Distal Interlocking ◽  
Secondary Objective ◽  
Set Up

Introduction:Ante Grade Humeral Nailing (AGHN) with traditional positioning causes crowding at the patient's head end, cramming for the surgeon and anaesthetist, scarcity of space available for the scrub nurse and X-ray technician, and neurovascular risks while performing distal interlocking. Minimal literature is available regarding the optimal position and set up in the operating theatre (OT). The primary objective was to describe, how effective novel Jahwari’s position is by assessing the ergonomics for OT personnel, OT time, and radiation exposure. A secondary objective was to evaluate the safety of inserting distal interlocking screws. Case Report:The head of the patient is placed away from the anaesthetist and their equipment, which were placed at the foot end of the patient. The patients were connected to the anaesthesia machine with a long airway extension, which was anchored to the table. The C arm machine was brought from the contralateral side and did not have to be moved. The scrub nurse and the surgeon were placed at the head end of the patient. Pregnant patients, those aged <18 years, and those with open fractures were excluded from our study. A single consultant operated on all cases for standardization. OT time and radiation exposure were monitored. Conclusion:Inspired by our use of this position for cervical spine patients for more than a decade, Jahwari’s position and setup were innovated. This setup gives ample room for the anaesthetist at the foot end. The surgeon and assistants are free from cramming at the head end. Complementarily, it provides ample space for the X-ray technician and scrubs nurse. Keywords:Jahwari position, antegrade humeral nailing, modified lateral position.

The Risk from Radiation Exposure during Operative X-ray Screening in Hand Surgery

1994 ◽  
Vol 19 (3) ◽  
pp. 393-396 ◽  
Author(s):  
P. M. ARNSTEIN ◽  
A. M. RICHARDS ◽  
R. PUTNEY
Keyword(s):  
Ionizing Radiation ◽  
Radiation Exposure ◽  
Scattered Radiation ◽  
Radiation Dosage ◽  
Hand Surgery ◽  
X Ray ◽  
Set Up

In response to legislation concerning the use of ionizing radiation, and to a case in which a patient developed multiple skin malignancies as a result of over-exposure to ionizing radiation, we set up an investigation to attempt to quantify the radiation dosage to which theatre personnel are exposed during X-ray fluoroscopy (screening) in hand surgery. It was found that the risk was small if sensible precautions were taken, but increased significantly if they were ignored. From these results specific measures are outlined which, when implemented, reduce the dose of scattered radiation to which theatre personnel and patients are subjected during screening in hand surgery.

scholarly journals Identifying explosive behavioral trace in the CNX Nifty Index: a quantum finance approach

2018 ◽  
Vol 15 (1) ◽  
pp. 208-223 ◽  
Author(s):  
Bikramaditya Ghosh ◽  
Emira Kozarević
Keyword(s):  
Machine Learning ◽  
Reynolds Number ◽  
Financial Markets ◽  
Stock Exchange ◽  
Primary Objective ◽  
Learning Approaches ◽  
Trace Back ◽  
Wave Particle Duality ◽  
Secondary Objective ◽  
Set Up

The financial markets are found to be finite Hilbert space, inside which the stocks are displaying their wave-particle duality. The Reynolds number, an age old fluid mechanics theory, has been redefined in investment finance domain to identify possible explosive moments in the stock exchange. CNX Nifty Index, a known index on the National Stock Exchange of India Ltd., has been put to the test under this situation. The Reynolds number (its financial version) has been predicted, as well as connected with plausible behavioral rationale. While predicting, both econometric and machine-learning approaches have been put into use. The primary objective of this paper is to set up an efficient econophysics’ proxy for stock exchange explosion. The secondary objective of the paper is to predict the Reynolds number for the future. Last but not least, this paper aims to trace back the behavioral links as well.

Evaluation of Freezing Methods by Low Temperature X-Ray Diffraction

1977 ◽  
Vol 35 ◽  
pp. 330-333
Author(s):  
T. Gulik-Krzywicki ◽  
M.J. Costello
Keyword(s):  
Biological Materials ◽  
Molecular Organization ◽  
X Ray Diffraction ◽  
Glass Capillary ◽  
X Ray ◽  
Rate Dependent ◽  
Before And After ◽  
Freeze Etching ◽  
Diffraction Patterns ◽  
Set Up

Freeze-etching electron microscopy is currently one of the best methods for studying molecular organization of biological materials. Its application, however, is still limited by our imprecise knowledge about the perturbations of the original organization which may occur during quenching and fracturing of the samples and during the replication of fractured surfaces. Although it is well known that the preservation of the molecular organization of biological materials is critically dependent on the rate of freezing of the samples, little information is presently available concerning the nature and the extent of freezing-rate dependent perturbations of the original organizations. In order to obtain this information, we have developed a method based on the comparison of x-ray diffraction patterns of samples before and after freezing, prior to fracturing and replication.Our experimental set-up is shown in Fig. 1. The sample to be quenched is placed on its holder which is then mounted on a small metal holder (O) fixed on a glass capillary (p), whose position is controlled by a micromanipulator.

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.

Evaluation of radiation exposure to the examiner in the angiografy in routine clincal practice using a x-ray protictive glove

2017 ◽  
Vol 189 (S 01) ◽  
pp. S1-S124
Author(s):  
P Kamusella ◽  
F Scheer ◽  
C Lüdtke ◽  
P Wiggermann ◽  
C Wissgott ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
X Ray

The Student Room Survey: Changes in the Post Graduate Study for Cardiothoracic Surgery

2020 ◽  
Vol 23 (2) ◽  
pp. 71-74
Author(s):  
Md Faizus Sazzad ◽  
Mohammed Moniruzzaman ◽  
Dewan Iftakher Raza Choudhury ◽  
Arif Ahmed Mohiuddin ◽  
Raafi Rahman ◽  
...  
Keyword(s):  
Thoracic Surgery ◽  
Retrospective Analysis ◽  
Primary Objective ◽  
Graduate Study ◽  
Postgraduate Students ◽  
Depth Interview ◽  
Secondary Objective ◽  
Cardio Vascular ◽  
The University ◽  
Day By Day

Background: The number of postgraduate students in Cardiac surgical discipline is increasing day by day with incremental proportion are measurably suffering from the unnecessary lingering of the present course curriculum. The primary objective of this study was to find out the last 5 years’ of results of Masters in Surgery course under the University of Dhaka from a student room survey. A secondary objective was to find out positive changes that could show us the way of a step toward up-gradation. Methods: It is a retrospective analysis of all examination results of Cardio-vascular & Thoracic Surgery published since January 2008 to January 2013 from the University of Dhaka with in depth interview of 11 participants. Results: 85.24% students failed to pass part-I of Masters in Surgery for Cardio-vascular & Thoracic Surgery course while, 82.18% in part-II and 71.28% failed to pass the final part. Average 2.51 attempts needed to complete each part of the designed course resulted into lingering of course duration for 42.18 months/student. In the thoracic surgery discipline the number of students alarmingly reduced up to 0% in the recent academic sessions. Conclusions: Masters in Surgery is resulting in unnecessary prolongation of the course. We should step forward to meet the next generation challenge. Journal of Surgical Sciences (2019) Vol. 23(2): 71-74

Epidemiology of pheochromocytoma and paraganglioma: population-based cohort study

2021 ◽  
Vol 184 (1) ◽  
pp. 19-28
Author(s):  
Alexander A Leung ◽  
Janice L Pasieka ◽  
Martin D Hyrcza ◽  
Danièle Pacaud ◽  
Yuan Dong ◽  
...  
Keyword(s):  
Cohort Study ◽  
Administrative Data ◽  
Laboratory Data ◽  
Population Based ◽  
Incidence Rates ◽  
Primary Objective ◽  
Administrative Databases ◽  
Secondary Objective ◽  
True Frequency ◽  
Clinical Records

Objective Despite the significant morbidity and mortality associated with pheochromocytoma and paraganglioma, little is known about their epidemiology. The primary objective was to determine the incidence of pheochromocytoma and paraganglioma in an ethnically diverse population. A secondary objective was to develop and validate algorithms for case detection using laboratory and administrative data. Design Population-based cohort study in Alberta, Canada from 2012 to 2019. Methods Patients with pheochromocytoma or paraganglioma were identified using linked administrative databases and clinical records. Annual incidence rates per 100 000 people were calculated and stratified according to age and sex. Algorithms to identify pheochromocytoma and paraganglioma, based on laboratory and administrative data, were evaluated. Results A total of 239 patients with pheochromocytoma or paraganglioma (collectively with 251 tumors) were identified from a population of 5 196 368 people over a period of 7 years. The overall incidence of pheochromocytoma or paraganglioma was 0.66 cases per 100 000 people per year. The frequency of pheochromocytoma and paraganglioma increased with age and was highest in individuals aged 60–79 years (8.85 and 14.68 cases per 100 000 people per year for males and females, respectively). An algorithm based on laboratory data (metanephrine >two-fold or normetanephrine >three-fold higher than the upper limit of normal) closely approximated the true frequency of pheochromocytoma and paraganglioma with an estimated incidence of 0.54 cases per 100 000 people per year. Conslusion The incidence of pheochromocytoma and paraganglioma in an unselected population of western Canada was unexpectedly higher than rates reported from other areas of the world.

Incidência da utilização de protetores bucais em diversos esportes de contato

2020 ◽  
Vol 12 (45) ◽  
pp. 118-122
Author(s):  
Victor Paes Dias Gonçalves ◽  
Hugo Leonardo Matias Nahmias ◽  
Marcus Menezes Alves Azevedo
Keyword(s):  
Martial Arts ◽  
Rio De Janeiro ◽  
Dental Trauma ◽  
Primary Objective ◽  
Type Ii ◽  
Contact Sports ◽  
The Face ◽  
Secondary Objective ◽  
The City

Among contact sports, the practice of martial arts offers a greater risk of causing dental trauma and fractures as contact with the face is more frequent. The primary objective of the research is to evaluate the incidence of mouthguard use, and the secondary objective is to verify which type has a greater predominance and the difficulties in its use correlating to the type of mouthguard used. A documentary study was carried out with 273 athletes of different contact sports, among them: MMA, Boxing, Muay Thai, Jiu-Jitsu, and Taekwondo of the city of Campos dos Goytacazes, Rio de Janeiro, Brazil. It was concluded that the most commonly used mouthguard is PB Boils and Bites - Type II and its level of approval is poor, interfering with the athletes’ performance, mainly in relation to the breathing factor.

Requesting physicians’ knowledge of X-radiation exposure from computed tomography scan examinations: A case study of two Nigerian tertiary hospitals

2020 ◽  
Vol 3 ◽  
pp. 36-39
Author(s):  
Samson O. Paulinus ◽  
Benjamin E. Udoh ◽  
Bassey E. Archibong ◽  
Akpama E. Egong ◽  
Akwa E. Erim ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Ionizing Radiation ◽  
Ct Scan ◽  
Radiation Exposure ◽  
Work Experience ◽  
Radiation Risk ◽  
Radiological Protection ◽  
X Ray ◽  
Tertiary Hospitals ◽  
Medical Exposure

Objective: Physicians who often request for computed tomography (CT) scan examinations are expected to have sound knowledge of radiation exposure (risks) to patients in line with the basic radiation protection principles according to the International Commission on Radiological Protection (ICRP), the Protection of Persons Undergoing Medical Exposure or Treatment (POPUMET), and the Ionizing Radiation (Medical Exposure) Regulations (IR(ME)R). The aim is to assess the level of requesting physicians’ knowledge of ionizing radiation from CT scan examinations in two Nigerian tertiary hospitals. Materials and Methods: An 18-item-based questionnaire was distributed to 141 practicing medical doctors, excluding radiologists with work experience from 0 to >16 years in two major teaching hospitals in Nigeria with a return rate of 69%, using a voluntary sampling technique. Results: The results showed that 25% of the respondents identified CT thorax, abdomen, and pelvis examination as having the highest radiation risk, while 22% said that it was a conventional chest X-ray. Furthermore, 14% concluded that CT head had the highest risk while 9% gave their answer to be conventional abdominal X-ray. In addition, 17% inferred that magnetic resonance imaging had the highest radiation risk while 11% had no idea. Furthermore, 25.5% of the respondents have had training on ionizing radiation from CT scan examinations while 74.5% had no training. Majority (90%) of the respondents were not aware of the ICRP guidelines for requesting investigations with very little (<3%) or no knowledge (0%) on the POPUMET and the IR(ME)R respectively. Conclusion: There is low level of knowledge of ionizing radiation from CT scan examinations among requesting physicians in the study locations.

Sign in / Sign up

Export Citation Format

Share Document