scholarly journals Total hip arthroplasty planning

2019 ◽  
Vol 4 (11) ◽  
pp. 626-632 ◽  
Author(s):  
Alessandro Colombi ◽  
Daniele Schena ◽  
Claudio Carlo Castelli
Keyword(s):  
Preoperative Planning ◽  
Surgical Team ◽  
Hip Joint Replacement ◽  
Permanent Record ◽  
X Ray ◽  
Digital Templating ◽  
Scan Time ◽  
Difficult Cases ◽  
Cup Position ◽  
Transverse Acetabular Ligament

Preoperative planning is mandatory to achieve the restoration of a correct and personalized biomechanics of the hip. The radiographic review is the first and fundamental step in the planning. Limb or pelvis malpositioning during the review results in mislead planning. Correct templating is possible using three different methods: acetate templating on digital X-ray, digital 2D templating on digital X-ray and 3D digital templating on CT scan. Time efficiency, costs, reproducibility and accuracy must be considered when comparing different templating methods. Based on these parameters, acetate templating should not be abandoned; digital templating allows a permanent record of planning and can be electronically viewed by different members of surgical team; 3D templating is intrinsically more accurate. There is no evidence in the few recently published studies that 3D templating impacts positively on clinical outcomes except in difficult cases. The transverse acetabular ligament (TAL) is a reliable intraoperative soft tissue reference to set cup position. Spine–hip relations in osteoarthritic patients undergoing hip joint replacement must be considered. Cite this article: EFORT Open Rev 2019;4:626-632. DOI: 10.1302/2058-5241.4.180075

scholarly journals Continuous scanning for Bragg coherent X-ray imaging

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Ni Li ◽  
Maxime Dupraz ◽  
Longfei Wu ◽  
Steven J. Leake ◽  
Andrea Resta ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Light Sources ◽  
Pt Nanoparticle ◽  
Strain Fields ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
Scan Time ◽  
X Ray Imaging ◽  
Continuous Scanning ◽  
Diffraction Imaging

Abstract We explore the use of continuous scanning during data acquisition for Bragg coherent diffraction imaging, i.e., where the sample is in continuous motion. The fidelity of continuous scanning Bragg coherent diffraction imaging is demonstrated on a single Pt nanoparticle in a flow reactor at $$400\,^\circ \hbox {C}$$ 400 ∘ C in an Ar-based gas flowed at 50 ml/min. We show a reduction of 30% in total scan time compared to conventional step-by-step scanning. The reconstructed Bragg electron density, phase, displacement and strain fields are in excellent agreement with the results obtained from conventional step-by-step scanning. Continuous scanning will allow to minimise sample instability under the beam and will become increasingly important at diffraction-limited storage ring light sources.

scholarly journals Factors Predicting Operating Room Time in Ureteroscopy and Ureterorenoscopy

2018 ◽  
Vol 12 (4) ◽  
pp. 195-200
Author(s):  
Ioannis KatafigiotisItay ◽  
Itay M. Sabler ◽  
Eliyahu M. Heifetz ◽  
Ayman Isid ◽  
Stavros Sfoungaristos ◽  
...  
Keyword(s):  
Operating Room ◽  
Renal Stones ◽  
Demographic Parameters ◽  
Surgical Team ◽  
X Ray ◽  
Multiple Parameters ◽  
Surgeon Experience ◽  
Regression Test ◽  
Room Time ◽  
Operating Room Time

Backgrounds/Aims: Operation room (OR) time is of great value affecting surgical outcome, complications and the daily surgical program with financial implications. Methods: We retrospectively evaluated 570 consecutive patients submitted to ureteroscopy or ureterorenoscopy for the treatment of ureteral or renal stones. Demographic parameters, patient's stones characteristics, type of ureteroscope, surgeon experience and surgical theater characteristics were analyzed. OR time was calculated from the initiation of anesthesia to patient extubation. Multivariate analysis was conducted using a linear regression test with multiple parameters to identify predictors of OR time. Results: Eight factors were identified as significant. These include total stones volume, ureteroscope used, stone number, nurses experience, radio-opacity of the stone on kidney-ureter-bladder X-ray, main surgeon experience, operating room type, and having a nephrostomy tube prior to surgery. Conclusions: The surgical team experience and familiarity with endourological procedure, and the surgical room characteristics has a crucial impact on OR time and effectiveness.

scholarly journals Interventional 3D Augmented Reality in Orthopedic, Trauma and Vascular Surgery

2018 ◽  
Vol 8 (2) ◽  
pp. 25-29
Author(s):  
Sheila Esmeralda Gonzalez-Reyna ◽  
Pascal Fallavollita
Keyword(s):  
Optimal Control ◽  
Augmented Reality ◽  
Mixed Reality ◽  
Computer Assisted ◽  
Orthopedic Trauma ◽  
Surgical Team ◽  
X Ray ◽  
Surgical Workflow ◽  
Video Images ◽  
Real Time Visualization

The Medical Education, Training and Computer Assisted Interventions (METRICS) Laboratory aims to integrate novel mixed-reality technologies with application in computer assisted interventions. We showcase two technologies with specific aims at optimizing surgical workflow and minimizing radiation exposure in orthopedic, trauma, and vascular surgeries. The first is an Augmented Reality C-arm fluoroscope, which provides intuitive real-time visualization by accurately overlaying X-ray to video images. The second is a ‘Desired-views’ user interface which resolves the challenges involved in the optimal control of C-arm fluoroscopes for their constant repositioning during surgery by either the interventionalist or the surgical team.

Preoperative Planning of Transapical Beating Heart Mitral Valve Repair for Safe Adaptation in Clinical Practice

2018 ◽  
Vol 13 (3) ◽  
pp. 200-206 ◽  
Author(s):  
Samuel Heuts ◽  
Jean H. T. Daemen ◽  
Sebastian A.F. Streukens ◽  
Jules R. Olsthoorn ◽  
Jindrich Vainer ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Mitral Valve ◽  
Rapid Prototyping ◽  
Mitral Valve Repair ◽  
Preoperative Planning ◽  
Success Probability ◽  
Heart Team ◽  
Surgical Team ◽  
Valve Repair ◽  
Surgical Success

Objective Transapical off-pump minimally invasive mitral valve repair (TOP-MINI) is a new technique for the surgical repair of degenerative mitral regurgitation based on mitral valve prolapse. The aim of this study is to demonstrate the preoperative planning tools available for starting this new procedure in a safe manner. Methods The first patients undergoing TOP-MINI by a single surgeon in 2016 were prospectively included. All patients underwent identical clinical pathways and underwent extensive preoperative planning for a safe start of the program. Patients were discussed in our dedicated mitral valve heart-team consisting of diagnostic and interventional mitral valve specialists. All patients underwent computed tomography, transthoracic and transesophageal echocardiography, and mitral valve replication using rapid prototyping. All procedures were performed by the same surgical team. Results Thirty-six patients were discussed for isolated mitral valve repair in our dedicated mitral valve heart team of which seven patients were deemed eligible for this novel approach. Three-dimensional (3D) reconstructions of computed tomography images allowed the surgical team to determine skin incision level and ideal level of device insertion near the apex of the heart. Echocardiography and rapid prototyping allowed us to assess surgical success probability by determining the amount of tissue overlap and was used intraoperatively for guidance. All patients were operated on successfully, without any major adverse events. Conclusions We demonstrate a method to safely start the TOP-MINI program with precise patient selection and preoperative planning, allowing us to determine procedural strategy and assessment of surgical success probability.

scholarly journals Liposarcoma of the spermatic cord: a report of two cases

2012 ◽  
Vol 94 (1) ◽  
pp. e10-e12 ◽  
Author(s):  
CJ Tan ◽  
BVM Dasari ◽  
J Smyth ◽  
RJ Brown
Keyword(s):  
Spermatic Cord ◽  
Preoperative Planning ◽  
Radiological Examination ◽  
Surgical Team ◽  
The Common

Liposarcomas of the spermatic cord are unusual and rarely reported in the literature. These tumours can sometimes be mistaken for the common scrotal swellings such as hydrocoeles and hernias. Careful clinical and radiological examination will help in appropriate preoperative planning and surgery by an experienced surgical team. We report our experience of two cases of such scrotal swellings.

Features of preoperative planning for hip arthroplasty

2021 ◽  
Vol 2 (2) ◽  
pp. 59-64
Author(s):  
B.P. Buryachenko ◽  
◽  
D.I. Vartholomew ◽  
Keyword(s):  
Hip Arthroplasty ◽  
Hip Replacement ◽  
Preoperative Planning ◽  
X Rays ◽  
X Ray ◽  
Replacement Surgery ◽  
Hip Replacement Surgery ◽  
Digital Planning ◽  
Speed Up

Relevance. Preoperative planning is an integral stage of hip replacement surgery, which reduces the number of complications and improves the accuracy of the installation of endoprosthesis components. Goal. Assess the accuracy of digital preoperative planning using mediCAD® v.6. Material and methods. The study included data from 276 patients with idiopathic coxarthrosis who were treated at the orthopedic department of the Center of Traumatology and Orthopedics of the Main Military Clinical Hospital named after N.N. Burdenko in the period from 2018 to 2020.The patients had X-rays of the pelvis and hip joint in two projections. All patients underwent total hip arthroplasty with cementless endoprostheses. Before surgery, all patients underwent preoperative planning using the mediCAD® v.6 software. After the operation, a control X-ray was performed, followed by an assessment of the obtained images in the same software. The planning accuracy was evaluated by comparing the parameters that were calculated in the program before the operation with the parameters of the installed implants. The results. The conducted study demonstrated the high accuracy of digital preoperative planning. The coincidence of the planned sizes of the acetabular component of the endoprosthesis and a deviation within +/- one size was observed in 93% of patients, femoral — in 84% of patients. Conclusion. Preoperative planning is an integral stage of hip replacement surgery, which allows you to perform the necessary preparation for the intervention. Digital planning allows you to simplify and speed up the process of preparing for an operation and improve the quality of its execution.

Reinforcing the vascular disruption theory of the genesis of Poland’s syndrome: a rare association of diaphragmatic eventration in a preterm infant with severe musculoskeletal defects

2021 ◽  
Vol 14 (1) ◽  
pp. e238392
Author(s):  
Nadira Shahrul Baharin ◽  
Eman Awadh Hashim ◽  
Quek Bin Huey ◽  
Suresh Chandran
Keyword(s):  
Subclavian Artery ◽  
Surgical Team ◽  
Poland’S Syndrome ◽  
X Ray ◽  
Vascular Disruption ◽  
Poland's Syndrome ◽  
Chest Deformity ◽  
Small Hand ◽  
Chest X Ray ◽  
The Right

A preterm female infant was admitted at birth with respiratory distress. On examination, she had an asymmetric right chest wall and ipsilateral small hand. Air entry was reduced over the right chest. A clinical diagnosis of Poland’s syndrome was made based on the hypoplasia of the right pectoral muscles, absent nipple, deformed ribs and symbrachydactyly of the ipsilateral hand. Chest X-ray suggested and ultrasound confirmed eventration of the right hemidiaphragm. ‘Subclavian artery supply disruption sequence’ (SASDS) theory by Bavnick and Weaver remains the most accepted pathogenic mechanism in Poland’s syndrome. This case reinforces SASDS theory associated with the genesis of Poland’s syndrome that relates to the pathogenicity of vascular disruption of subclavian artery, characteristics of which are unilateral pectoral defects, symbrachydactyly and eventration of the diaphragm. At 2 months, she underwent diaphragm plication. She is under review by our multidisciplinary surgical team for reconstruction of the chest deformity.

scholarly journals The Reliability and Accuracy of Knee Implants Sizing Predicted by Digital Templating

2012 ◽  
Vol 12 (1) ◽  
pp. 29-31 ◽  
Author(s):  
Sergejs Zadorožnijs ◽  
Konstantins Kalnberzs
Keyword(s):  
Preoperative Planning ◽  
Digital Images ◽  
Cost Effective ◽  
Osteoarthritis Of The Knee ◽  
Magnification Factor ◽  
Digital Templating ◽  
Press Fit ◽  
Implant Size ◽  
Total Knee ◽  
Correct Size

Summary Introduction. Osteoarthritis of the knee is a common and frequently symptomatic illness. Total knee replacement (TKR) has evolved as an accepted, cost-effective and efficacious treatment modality for osteoarthritis and other forms of arthritic conditions of the knee joint. Preoperative planning is an important part of the surgical procedure. The inability to accurately determine the magnification factor of the radiograph is one of the major problems in analog preoperative planning of TKR. With the use of calibration objects, the digital images can be corrected for the magnification factor. Aim of the Study. We aimed to determine the reliability and accuracy of digital templating in the pre-operative work-up for TKR. Materials and Methods. A retrospective study was done in 105 caucasian adults, who had osteoarthritis of the knee. Digital templating was performed using a calibrating 25-mm metallic ball and Agfa Orthopaedic Tools digital software package by a surgeon not involved with the operation, who was blinded to the size of the implant inserted. The Press Fit Condylar Sigma Knee system was used in all the patients. Digital anteroposterior and lateral radiographs of the knee were used in measuring the implant size. The results from digital images were compared with the size of actual femoral and tibial implants used at the time of surgery. Results. The correct size of the implant was predicted in 73 of 105 (69,5%) of the femoral and 70 of 105 (66,7%) of the tibial components. The correct size of the whole system was predicted in 58 of 105 (55,2%) cases. The digital preoperative planning predicted 104 of 105 (99,0%) femoral and tibial implants and 103 of 105 (98,1%) whole systems to within one size. Conclusions. We conclude that digital templating using a calibrating 25-mm metallic ball and Agfa Orthopaedic Tools digital software is a reliable method of predicting the implant to within one size.

Effect of Testing Factors on Rietveld Quantitative Analysis of Cement-Matrix Materials

2017 ◽  
Vol 898 ◽  
pp. 2054-2059
Author(s):  
Yan Ling Gan ◽  
Su Ping Cui ◽  
Ya Li Wang ◽  
Hong Xia Guo
Keyword(s):  
Quantitative Analysis ◽  
Phase Analysis ◽  
Rietveld Method ◽  
Cementitious Materials ◽  
Cement Matrix ◽  
Quantitative Phase Analysis ◽  
Step Size ◽  
X Ray ◽  
Quantitative Phase ◽  
Scan Time

For cement-matrix materials, the microstructure plays a vital important role in the research. Recently, quantitative phase analysis of cementitious materials can be performed using the Rietveld method by fitting the calculated X-ray diffraction (XRD) profile with the observed one. The aim of this paper is to further perform the quantitative analysis by the Rietveld method and discuss the influence of testing factors on the Rietveld quantitative phase analysis. The factors included the collection range of pattern, step size and the scan time of per step. In this study, the chemical composition of the samples was determined by X-ray fluorescence (XRF) spectrometry. And their phase composition was calculated by X-ray powder diffraction and Rietveld analysis. The results showed that the collection range of pattern depended on the tested materials , and the scanning range should include the main diffraction peak of the sample. Smaller step size and longer scan time of each step made the fitting factor smaller, also the calculated pattern coincided with the measured pattern, better enhance the precision of the analyses.

Sign in / Sign up

Export Citation Format

Share Document