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https://www.readbyqxmd.com/read/29054990/how-3d-patient-specific-instruments-improve-accuracy-of-pelvic-bone-tumour-resection-in-a-cadaveric-study
#1
A Sallent, M Vicente, M M Reverté, A Lopez, A Rodríguez-Baeza, M Pérez-Domínguez, R Velez
OBJECTIVES: To assess the accuracy of patient-specific instruments (PSIs) versus standard manual technique and the precision of computer-assisted planning and PSI-guided osteotomies in pelvic tumour resection. METHODS: CT scans were obtained from five female cadaveric pelvises. Five osteotomies were designed using Mimics software: sacroiliac, biplanar supra-acetabular, two parallel iliopubic and ischial. For cases of the left hemipelvis, PSIs were designed to guide standard oscillating saw osteotomies and later manufactured using 3D printing...
October 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/29053542/biomechanical-comparison-of-intrapelvic-and-extrapelvic-fixation-for-acetabular-fractures-involving-the-quadrilateral-plate
#2
Gregory J Gillispie, Sharon N Babcock, Kyle P McNamara, Michaela E Dimoff, Arun Aneja, Philip J Brown, Eben A Carroll
OBJECTIVES: Elderly patients represent the fastest growing and most difficult to treat population sustaining acetabular fractures. When treated surgically, isolated extrapelvic or combined intrapelvic-extrapelvic constructs may be used. No biomechanical or clinical study has compared the merits of these 2 techniques in cadaveric models. This research aims to biomechanically quantify the additional benefit of intrapelvic fixation to a standard extrapelvic fixation construct. METHODS: Ten cadaveric pelves underwent standardized anterior column and quadrilateral plate fracture creation...
November 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28971089/posterior-sacroiliac-osteotomy-an-alternative-to-the-ilioinguinal-approach-for-pelvic-reconstruction-in-misalignment-lesions
#3
João Antonio Matheus Guimarães, Vinícius Magno da Rocha, André Luiz Loyelo Barcellos
Pelvic ring fractures occur in association with potentially fatal lesions, whose treatment is a priority in the polytrauma setting. As consequence, the definitive orthopedic approach may be postponed, leading patients to chronic and potentially disabling deformities. The treatment of these deformities is a challenge, requiring highly complex and staged surgical reconstructions. The ilioinguinal approach has been widely used in these surgeries, because it allows the release and mobilization of the hemipelvis and, in some cases, anterior fixation of the sacroiliac joint...
2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28889364/open-complete-anterior-dislocation-of-the-sacro-iliac-joint-in-a-4-year-old-boy-a-case-report-of-a-rare-injury-with-5-year-follow-up
#4
Walid A Elnahal, Mahmoud Fahmy, Mehool Acharya
Pelvic fractures are uncommon in children and account for between 0.3 and 7.5% of all pediatric injuries. Open pelvic fractures only account for up to 12.9% of all pediatric pelvic fractures. An unusual case of open complete anterior sacro-iliac joint dislocation in a 4-year-old boy is presented with a long-term follow-up. The multidisciplinary approach is reported with review of the current literature. A 4-year-old male presented to our institution in January 2012 after having been run over by a tractor. He presented with gross hemodynamical instability, MISS of 25, and an unstable lateral compression type III pelvic fracture with complete anterior dislocation of the left hemipelvis and a groin wound extending into the left thigh...
September 9, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28833500/primary-stability-of-a-cementless-acetabular-cup-in-a-cohort-of-patient-specific-finite-element-models
#5
Dermot O' Rourke, Rami Al-Dirini, Mark Taylor
The primary stability achieved during total hip arthroplasty determines the long-term success of cementless acetabular cups. Pre-clinical finite element testing of cups typically use a model of a single patient and assume the results can be extrapolated to the general population. This study explored the variability in predicted primary stability of a Pinnacle ® cementless acetabular cup in 103 patient-specific finite element models of the hemipelvis and examined the association between patient-related factors and the observed variability...
August 18, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28808345/minimally-invasive-treatment-of-both-column-acetabular-fractures-through-the-stoppa-combined-with-iliac-fossa-approach
#6
Ruipeng Zhang, Yingchao Yin, Shilun Li, Zhiyong Hou, Juan Wang, Wei Chen, Yingze Zhang
Both-column fractures are the most complicated group of acetabular fractures. Although great progress of surgical technique has been made, the choice of approach is controversial. All the fragments could be exposed and managed through combined ilioinguinal and Kocher-Langenbeck (IL+KL) approaches, which has been widely used to conduct the both-column fractures. However, the clinical popularization may be restricted for high rate of complication. Most internal area of the hemipelvis could be exposed through Stoppa combined with iliac fossa (S+IF) approach...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729099/implementing-a-cervical-sentinel-lymph-node-biopsy-program-quality-improvement-in-gynaecologic-oncology
#7
Maria C Cusimano, Rachel Walker, Marcus Q Bernardini, Geneviève Bouchard-Fortier, Stephane Laframboise, Taymaa May, Joan Murphy, Barry Rosen, Al Covens, Blaise Clarke, Patricia Shaw, Marjan Rouzbahman, Ravi Mohan, Sarah E Ferguson
OBJECTIVE: Sentinel lymph node (SLN) biopsy is becoming a reasonable alternative to pelvic lymphadenectomy in early-stage cervical cancer. It is therefore imperative that centres without prior experience are able to successfully implement the procedure. The objectives of the current study were to (1) describe the process of implementing an SLN biopsy program with a novel peer mentorship component and (2) assess post-program quality improvement metrics, including SLN detection rate (DR) and diagnostic parameters...
August 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/28604450/low-volume-lymph-node-metastases-in-endometrial-carcinoma
#8
Lani K Clinton, Jordan Kondo, Michael E Carney, Pamela Tauchi-Nishi, Keith Terada, David Shimizu
OBJECTIVE: The aim of this study was to determine the histopathologic characteristics of patients with endometrial carcinoma with low-volume metastases (micrometastases and isolated tumor cells) compared with macrometastases. METHODS: We performed a retrospective review of patients with endometrial carcinoma. RESULTS: Among 350 robotic-assisted hysterectomies for endometrial cancer, 187 (53%) underwent attempted sentinel lymph node (SLN) biopsy...
July 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28493805/creating-three-dimensional-printed-models-of-acetabular-fractures-for-use-as-educational-tools
#9
Matthew S Manganaro, Yoav Morag, William J Weadock, Corrie M Yablon, Kara Gaetke-Udager, Erica B Stein
Acetabular fractures are frequently encountered in some clinical practices, and the precise classification of these fractures greatly influences treatments and outcomes. The authors identified the need for an educational aid when teaching acetabular fracture classifications, given the complex spatial anatomy and the nonintuitive classification system that is commonly used. Three-dimensional ( 3D three-dimensional ) printing is an evolving technique that has applications as an educational aid, providing the student with a tangible object to interact with and learn from...
May 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28409337/surgical-considerations-with-the-operative-fixation-of-unstable-paediatric-pelvic-ring-injuries
#10
Mohamed Kenawey
INTRODUCTION: The operative treatment of unstable pelvic injuries in paediatrics is not frequently indicated. The detailed modes of pelvic ring failure, surgical techniques, fixation choices, and peri-operative difficulties are not well reported. METHODS: From September 2010 to March 2016, 62 paediatric patients were admitted to an academic level I trauma center with the diagnosis of pelvic ring injury. Of them, 29 (17 males and 12 females) had operative fixation of unstable pelvic injuries...
April 13, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28163241/application-of-3d-printing-for-treating-fractures-of-both-columns-of-the-acetabulum-benefit-of-pre-contouring-plates-on-the-mirrored-healthy-pelvis
#11
P Upex, P Jouffroy, G Riouallon
Acetabular fractures can be challenging to treat, in part because the shape of the fixation plates needs to be adjusted during the surgical procedure. One possibility is to generate a model of the uninjured half of a fractured pelvis with 3D printing, and then pre-contour the fixation plates preoperatively on this model. The purpose of this technical note is to describe how we used 3D printing as an aid to treat acetabular fractures. The quality of the fracture reduction, fracture fixation and time savings were evaluated...
May 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27921206/periacetabular-osteotomy-provides-higher-survivorship-than-rim-trimming-for-acetabular-retroversion
#12
COMPARATIVE STUDY
Corinne A Zurmühle, Helen Anwander, Christoph E Albers, Markus S Hanke, Simon D Steppacher, Klaus A Siebenrock, Moritz Tannast
BACKGROUND: Acetabular retroversion can cause impaction-type femoroacetabular impingement leading to hip pain and osteoarthritis. It can be treated by anteverting periacetabular osteotomy (PAO) or acetabular rim trimming with refixation of the labrum. There is increasing evidence that acetabular retroversion is a rotational abnormality of the entire hemipelvis and not a focal overgrowth of the anterior acetabular wall, which favors an anteverting PAO. However, it is unknown if this larger procedure would be beneficial in terms of survivorship and Merle d'Aubigné scores in a midterm followup compared with rim trimming...
April 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27779271/inter-and-intra-observer-variability-of-radiography-and-computed-tomography-for-evaluation-of-zurich-cementless-acetabular-cup-placement-ex-vivo
#13
Jessica O Leasure, Jeffrey N Peck, Armando Villamil, Kara L Fiore, Cheryl A Tano
OBJECTIVE: To evaluate the inter- and intra-observer variability in measurement of the angle of lateral opening (ALO) and version angle measurement using digital radiography and computed tomography (CT). METHODS: Each hemipelvis was implanted with a cementless acetabular cup. Ventrodorsal and mediolateral radiographs were made of each pelvis, followed by CT imaging. After removal of the first cup, the pelves were implanted with an acetabular cup in the contralateral acetabulum and imaging was repeated...
November 23, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/27718011/gun-barrel-view-of-the-anterior-pelvic-ring-for-percutaneous-anterior-column-or-superior-pubic-ramus-screw-placement
#14
Nicholas Quercetti, Brandon Horne, Zac DiPaolo, Michael J Prayson
BACKGROUND: Traditionally, operative fixation of pelvic and acetabular injuries involves complex approaches and significant complications. Accelerated rehabilitation, decreased soft tissue stripping and decreased wound complications are several benefits driving a recent interest in percutaneous fixation. We describe a new fluoroscopic view to guide the placement of screws within the anterior pelvic ring. METHODS: Twenty retrograde anterior pelvic ring screws were percutaneously placed in ten cadaveric specimens...
July 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/27685017/a-computational-efficient-method-to-assess-the-sensitivity-of-finite-element-models-an-illustration-with-the-hemipelvis
#15
Dermot O'Rourke, Saulo Martelli, Murk Bottema, Mark Taylor
Understanding the sensitivity of FE models to assumptions and uncertainties in geometric parameters and material properties is a fundamental step in understanding the reliability of model predictions. The computational cost of individual simulations and the large number of required models limits comprehensive quantification of model sensitivity. To quickly assess the sensitivity of a FE model, we built linear and Kriging surrogate models of a FE model of the intact hemipelvis. The percentage of the total sum of squares (%TSS) was used to determine the most influential input parameters and their possible interactions on the median, 95th percentile and maximum equivalent strains...
September 29, 2016: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/27556797/68ga-psma-pet-ct-false-positive-tracer-uptake-in-paget-disease
#16
Arun Sasikumar, Ajith Joy, Raviteja Nanabala, M R A Pillai, Hari T A
65-year-old man with left-sided pelvic pain on evaluation was found to have features suggestive of either Paget disease or prostatic bone metastasis of the left hemipelvis based on Tc-MDP bone scan and MRI. Ga-PSMA PET/CT to assess the possibility of primary prostate cancer and if present to stage it helped to rule out prostate cancer because of absence of focal abnormal increased tracer uptake in the prostate gland. However, false-positive tracer uptake was noted in the left hemipelvis, which was subject to biopsy and histopathologically proven to be Paget disease involvement...
October 2016: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/27376204/acute-appendicitis-complicating-into-portal-and-superior-mesenteric-vein-thrombosis
#17
Adnan Yousaf, Mushtaq Ahmed, Mahmud Aurangzeb
This case report describes a young man who presented with 9-day history of sudden-onset epigastric and right-sided lower abdominal pain. He was tachycardiac with temperature of 102°F. Tenderness was present in the peri-umbilical area and right iliac fossa. Investigations revealed a raised total leucocyte count (predominantly neutrophilic). Triphasic CTscan abdomen found thrombosis of right portal vein and its hepatic tributaries alongwith superior mesenteric vein (SMV) and its tributaries. Co-existent fluid in right hemipelvis abutting the cecum and appendiceal tip was suggestive of acute appendicitis...
June 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/27252439/posterior-fixation-of-apc-2-pelvic-ring-injuries-decreases-rates-of-anterior-plate-failure-and-malunion
#18
Frank R Avilucea, Paul S Whiting, Hassan Mir
BACKGROUND: Biomechanical studies suggest that augmenting anterior fixation of the pelvic ring with posterior fixation increases stability. Prior clinical studies have assessed radiographic outcomes following plate fixation of the symphysis. However, to our knowledge, none have directly compared the radiographic and clinical outcomes of anterior plate fixation alone with the outcomes of such plate fixation with the addition of posterior percutaneous screw fixation in the treatment of a partially disrupted hemipelvis...
June 1, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27137904/fracture-at-the-ischio-pubic-junction-after-periacetabular-osteotomy-in-the-adolescent-population
#19
Matthew Swann, Daniel J Sucato, Jose Romero, David A Podeszwa
INTRODUCTION: The Ganz periacetabular osteotomy (PAO) is a well-accepted surgical intervention for hip dysplasia. In the adolescent population it is performed in patients who are skeletally mature with symptoms related to acetabular dysplasia. Redistribution of stresses through the hemipelvis after PAO can lead to a fracture at the ischio-pubic junction (IPJ). METHODS: This is an IRB-approved, retrospective analysis of adolescent patients treated with a PAO for acetabular dysplasia from 1999 to 2012 at a single institution...
March 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/27022573/hemipelvectomy-erasto-gaertner-hospital-s-experiences-with-32-cases-in-10-years
#20
Rosyane Rena de Freitas, André Luiz Soares Crivellaro, Glauco José Pauka Mello, Múrio Armani Neto, Geraldo de Freitas Filho, Letícia Viani da Silva
OBJECTIVE: To show the experience of the Erasto Gaertner Hospital with hemipelvectomy surgery over a 10-year period. METHODS: This was a retrospective study on 32 patients who underwent hemipelvectomy at Erasto Gaertner Hospital between 1998 and 2008, assessing clinical and surgical characteristics. RESULTS: Among the 32 patients, 15 were female and 17 were male. The mean age was 37.94 years. Eight cases showed involvement of the neurovascular bundle: three were located in the iliac and extended to the thigh, two were in the acetabulum and extended to the thigh and three were in the acetabulum and pubis...
July 2010: Revista Brasileira de Ortopedia
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