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https://www.readbyqxmd.com/read/28102950/quantitative-impact-of-changes-in-marrow-cellularity-skeletal-size-and-bone-mineral-density-on-active-marrow-dosimetry-based-upon-a-reference-model
#1
Amy M Geyer, Bryan C Schwarz, Robert F Hobbs, George Sgouros, Wesley E Bolch
PURPOSE: The hematopoietically active tissues of skeletal bone marrow are a prime target for computational dosimetry given potential risks of leukemia and, at higher dose levels, acute marrow toxicity. The complex three-dimensional geometry of trabecular spongiosa, however, complicates schema for dose assessment in such a way that only a few reference skeletal models have been developed to date, and which are based upon microimaging of a limited number of cadaveric bone spongiosa cores...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102707/patient-dosimetry-audit-for-establishing-local-diagnostic-reference-levels-for-nuclear-medicine-ct
#2
Matthew Gardner, Ngonidzashe M Katsidzira, Erin Ross, Elizabeth A Larkin
OBJECTIVES: To establish a system for patient dosimetry audit and setting of Local Diagnostic Reference Levels (LDRLs) for Nuclear Medicine (NM) CT. METHODS: Computed Radiological Information System (CRIS) data were matched with NM paper records which provided the body region and dose mode for NMCT carried out at a large UK hospital. It was necessary to divide data in terms of the NM examination type, body region and dose mode. The mean and standard deviation Dose Length Products (DLPs) for common NMCT examinations were then calculated and compared to the proposed National DRLs (NDRLs)...
January 19, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28102457/prevalence-of-vertebral-fracture-and-densitometric-osteoporosis-in-spanish-adult-men-the-camargo-cohort-study
#3
José M Olmos, José L Hernández, Josefina Martínez, Emilio Pariente, Jesús Castillo, Daniel Prieto-Alhambra, Jesús González-Macías
The aim of this study was to assess the prevalence of densitometric osteoporosis and vertebral fractures in Spanish men aged ≥50 years, and to study how the relationship between them may change depending on how osteoporosis is diagnosed. A community-based population of 1003 men aged ≥50 years was studied. Bone mineral density (BMD) was measured by DXA at the lumbar spine, femoral neck and total hip. Vertebral fractures were assessed by lateral thoracic and lumbar spine radiographs. The prevalence of osteoporosis was estimated with both the World Health Organization (WHO) (T-score of <-2...
January 19, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/28102451/cauda-equina-syndrome-presentation-outcome-and-predictors-with-focus-on-micturition-defecation-and-sexual-dysfunction
#4
N S Korse, J A Pijpers, E van Zwet, H W Elzevier, C L A Vleggeert-Lankamp
BACKGROUND: Even though micturition, defecation, and sexual function are substantially affected in cauda equina syndrome (CES), data on outcome are scarce. METHODS: Medical files of patients operated on lumbar herniated disc were screened for CES and retrospectively analyzed for baseline characteristics, outcome of micturition, defecation, and sexual function and possible predictors. RESULTS: Seventy-five CES patients (52% men) were included with a mean age of 44 years...
January 19, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28102171/lumbar-disc-herniation-causing-cauda-equina-syndrome-in-a-paediatric-patient-a-case-report
#5
Mohamad Irshad, Khurshid Ahmad, Hilal Ahmad Malla
Lumbar disc disease occurs mainly in the adult population. A disc prolapse in the paediatric population is very rare. Cauda equine syndrome resulting from compression of the cauda equina is a rare syndrome and is one of the few spinal surgical emergencies. Here we present a 13-year-old boy with pain in the lumbar region radiating bilaterally to the lower limbs, with asymmetrical weakness of lower the limbs, perianal hypoaesthesia and urinary retention. MRI of lumbar spine confirmed disc protrusion at the L3-L4 level with severe spinal canal stenosis...
August 30, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28101631/lumbar-and-sacral-pedicle-screw-placement-using-a-template-does-not-improve-the-midterm-pain-and-disability-outcome-in-comparison-with-free-hand-method
#6
Matjaz Merc, Gregor Recnik, Zmago Krajnc
BACKGROUND: The free-hand technique carries a higher risk of pedicle weakening and neurovascular injuries in comparison with pedicle screw placement using a drill guide. Due to this evidence and because of some variances in the surgical method, different outcome can be expected. The objective of the study was to evaluate the disability, the back and leg pain before and at least 3 years after the surgery between examined groups. MATERIALS AND METHODS: Eleven patients in drill guide and 13 in control group were randomly assigned for vertebral fusion in the lumbar and first sacral regions...
January 19, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28100860/-a-pediatric-case-of-intractable-cerebrospinal-fluid-leakage-after-implantation-of-an-intrathecal-baclofen-pump
#7
Akitsugu Morishita, Hideo Aihara, Tomoaki Nakai, Masao Adachi
Intrathecal baclofen(ITB)infusion can offer a useful treatment for severe spasticity;however, numerous complications have been reported. We report a pediatric case in which intractable cerebrospinal fluid(CSF)leakage associated with several inconvenient symptoms arose after implantation of the ITB pump system. A 10-year-old girl with spastic quadriparesis and athetoid cerebral palsy underwent implantation of an ITB delivery system. After discharge, she presented with fluid collection surrounding the pump in the abdomen...
January 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28099343/efficacy-and-safety-of-bisphosphonates-in-management-of-low-bone-density-in-inflammatory-bowel-disease-a-meta-analysis
#8
Liwei Yao, Haiqing Wang, Wenwei Dong, Zhenxin Liu, Haijiao Mao
This study aims to determine whether bisphosphonates are safe, as well as effective against bone mineral loss in inflammatory bowel disease (IBD). A computerized search of electronic databases from 1966 to 2016 was performed. Randomized controlled trials (RCTs) were included in this review to evaluate the role of bisphosphonates in the management of osteoporosis in IBD patients. A revised 7-point Jadad scale was used to evaluate the quality of each study. Overall, 13 RCTs and 923 patients met the inclusion criteria of this meta-analysis...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28099288/assessing-the-agreement-between-radiologic-and-clinical-measurements-of-lumbar-and-cervical-epidural-depths-in-patients-undergoing-prone-interlaminar-epidural-steroid-injection
#9
James Harvey Jones, Naileshni Singh, Anna Nidecker, Chin-Shang Li, Scott Fishman
BACKGROUND: Fluoroscopy-guided epidural steroid injection (ESI) commonly is performed to treat radicular pain yet can lead to adverse events if the needle is not advanced with precision. Accurate preoperative assessment of the distance from the skin to the epidural space holds the potential for reducing the risks of adverse effects from ESI. It was hypothesized that the distance from the skin to the epidural space as measured on preoperative magnetic resonance imaging (MRI) would agree with the distance traveled by a Tuohy needle to reach the epidural space during midline, interlaminar ESI...
January 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28098745/effect-of-freeze-dried-allograft-bone-with-human-basic-fibroblast-growth-factor-containing-a-collagen-binding-domain-from-clostridium-histolyticum-collagenase-on-bone-formation-after-lumbar-posterolateral-fusion-surgery-in-rats
#10
Gen Inoue, Kentaro Uchida, Osamu Matsushita, Hisako Fujimaki, Wataru Saito, Masayuki Miyagi, Hiroyuki Sekiguchi, Nozomu Nishi, Seiji Ohtori, Mizuki Yogoro, Masashi Takaso
STUDY DESIGN: An experimental study. OBJECTIVE: To evaluate the effectiveness of freeze-dried bone allograft (FDBA) with basic fibroblast growth factor (bFGF) fused with the polycystic kidney disease domain (PKD) and the collagen-biding domain (CBD) of Clostridium histolyticum collagenase, for the acceleration of lumbar posterolateral fusion in rats. SUMMARY OF BACKGROUND DATA: Reports indicate bFGF is an effective growth factor with osteogenic potential for promoting bone regeneration, although its efficiency decreases rapidly following its diffusion in body fluid from the host site...
January 16, 2017: Spine
https://www.readbyqxmd.com/read/28098744/trabecular-microstructure-and-damage-affect-cement-leakage-from-the-basivertebral-foramen-during-vertebral-augmentation
#11
Shengyun Li, Chongyan Wang, Zhi Shan, Junhui Liu, Tianming Yu, Xuyang Zhang, Shunwu Fan, Blaine A Christiansen, Wenyuan Ding, Fengdong Zhao
STUDY DESIGN: A prospective study on cadaver specimens. OBJECTIVE: To explore why cement leakage from BF easily occurs during vertebral augmentation procedures. SUMMARY OF BACKGROUND DATA: Type B (through BF, basivertebral foramen) cement leakage is the most common type after vertebral augmentation, but the mechanism of this is still controversial. The contribution of vertebral trabecular bone orientation and trabecular damage during compression fracture to cement leakage is still unknown...
January 16, 2017: Spine
https://www.readbyqxmd.com/read/28097658/segmental-fibre-type-composition-of-the-rat-iliopsoas-muscle
#12
Hrvoje Vlahovic, Ksenija Bazdaric, Verner Marijancic, Tamara Soic-Vranic, Daniela Malnar, Juraj Arbanas
The iliopsoas of the rat is composed of two muscles - the psoas major muscle and the iliacus muscle. The psoas major muscle arises from all the lumbar vertebrae and the iliacus muscle from the fifth and sixth lumbar vertebrae and ilium. Their common insertion point is the lesser trochanter of the femur, and their common action is the lateral rotation of the femur and flexion of the hip joint. Unlike humans, the rat is a quadruped and only occasionally rises up on its hind legs. Therefore, it is expected that the fibre type composition of the rat iliopsoas muscle will be different than that of humans...
January 18, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28097449/open-retromuscular-large-mesh-reconstruction-of-lumbar-incisional-hernias-including-the-atrophic-muscular-area
#13
Y Renard, L de Mestier, A Cagniet, N Demichel, C Marchand, J-L Meffert, R Kianmanesh, J-P Palot
PURPOSE: Lumbar incisional hernias (LIH) are a rare wall defect, whose surgical management is challenging because no recommendation exists. Moreover, LIH are frequently associated with flank bulging which should be taken into account during LIH surgical repair. We aimed to describe a cohort of patients operated on for LIH using a homogeneous surgical technique and to report surgical outcomes. METHODS: The records of all consecutive patients operated on in a specialized surgical center between January 2009 and January 2015 were retrospectively reviewed...
January 17, 2017: Hernia: the Journal of Hernias and Abdominal Wall Surgery
https://www.readbyqxmd.com/read/28097254/use-of-op-1-rhbmp-7-in-posterolateral-lumbar-arthrodesis
#14
EDITORIAL
Jetan H Badhiwala, Michael G Fehlings
No abstract text is available yet for this article.
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28097253/practical-implications-of-the-lumbar-spine-and-its-function-on-total-hip-arthroplasty
#15
EDITORIAL
Vincent Vinh Gia An, Brahman Shankar Sivakumar, Yadin David Levy, Jim Pierrepont, Warwick James Bruce
Correct component placement is of significant importance to ensure optimal outcomes in total hip arthroplasty (THA). Traditionally, the Lewinnek plane has been referenced as an adequate "safe zone", formed between the anterior superior iliac spines and public tubercles to optimize acetabular orientation. However, recent evidence shows that the positioning of this plane may vary due to the biomechanical relationship between the lumbar spine and hip. Therefore, the plane acquired intraoperatively may not accurately recreate the actual functional plane and acetabular orientation encountered outside of the intraoperative environment...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28097248/transpedicular-endoscopic-surgery-for-lumbar-spinal-synovial-cyst-report-of-two-cases
#16
Guntram Krzok, Albert E Telfeian, Ralf Wagner, Menno Iprenburg
BACKGROUND: Lumbar facet cysts are a benign, degenerative, and fairly uncommon cause for lumbar radiculopathy. The standard surgical treatment for lumbar facet cysts often requires a laminectomy and medial facetectomy which can further destabilize a pathological motion segment. The authors present here a novel technique for transpedicular endoscopic access to the pathology that obviates the need to violate the lamina or facet. METHODS: Two patient cases are described where the lumbar 4-5 facet cysts arise medial to the pedicle...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28097246/three-year-follow-up-of-a-randomized-controlled-trial-comparing-preoperative-neuroscience-education-for-patients-undergoing-surgery-for-lumbar-radiculopathy
#17
Adriaan Louw, Ina Diener, Merrill R Landers, Kory Zimney, Emilio J Puentedura
BACKGROUND: Results from a previous multicenter randomized controlled trial (RCT) on preoperative pain neuroscience education (PNE) for lumbar radiculopathy found no significant difference in patient reported outcomes between groups. However, patients who received PNE viewed their surgical experience more favorably and utilized significantly less healthcare compared to those that did not. The purpose is to determine if the reduction in healthcare costs from 1-year would be continued at 3-year following surgery, and to explore differences (if any) in patient reported outcomes...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28097245/consideration-of-proper-operative-route-for-interlaminar-approach-for-percutaneous-endoscopic-lumbar-discectomy
#18
Juichi Tonosu, Yasushi Oshima, Ryutaro Shiboi, Akihiko Hayashi, Yuichi Takano, Hirohiko Inanami, Hisashi Koga
BACKGROUND: Percutaneous endoscopic lumbar discectomy (PELD) is one of the less invasive treatments of lumbar disc herniation (LDH), and has three different operative approaches. This study focused on the interlaminar approach (ILA) and investigated the appropriate operative route for this approach. METHODS: ILA was performed in 41 patients with LDH. The width of the interlaminar space, LDH size, and positional relation between LDH and the corresponding nerve root were radiologically evaluated...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28097244/minimising-costs-in-spinal-surgery-is-group-save-testing-justified-in-lumbar-decompression-surgery
#19
William T Wilson, Adam M H Young, Paul Fivey
BACKGROUND: Lumbar microdiscectomy and laminectomy are two of the most common neurosurgical procedures performed worldwide. Current practice still sees pre-operative group and save testing prior to this surgery. The aim of this study was to determine the need for pre-operative group and save and post-operative blood checks. METHODS: Patient archives were reviewed to identify those undergoing primary elective lumbar decompression surgery at the Institute of Neurological Sciences, Queen Elizabeth University Hospital, Glasgow, UK...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28097243/range-of-motion-sacral-screw-and-rod-strain-in-long-posterior-spinal-constructs-a-biomechanical-comparison-between-s2-alar-iliac-screws-with-traditional-fixation-strategies
#20
Chester E Sutterlin, Antony Field, Lisa A Ferrara, Andrew L Freeman, Kevin Phan
BACKGROUND: S1 screw failure and L5/S1 non-union are issues with long fusions to S1. Improved construct stiffness and S1 screw offloading can help avoid this. S2AI screws have shown to provide similar stiffness to iliac screws when added to L3-S1 constructs. We sought to examine and compare the biomechanical effects on an L2-S1 pedicle screw construct of adding S2AI screws, AxiaLIF, L5-S1 interbody support via transforaminal lumbar interbody fusion (TLIF), and to examine the effect of the addition of cross connectors to each of these constructs...
December 2016: Journal of Spine Surgery (Hong Kong)
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