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https://www.readbyqxmd.com/read/29470714/surgical-management-of-cauda-syndrome-in-third-trimester-of-pregnancy-focusing-on-spinal-anesthesia-and-right-lateral-positioning-during-surgery-as-possible-practices
#1
REVIEW
Viktor Zsolt Kovari, Laszlo Horvath
PURPOSE: This article presents a surgical solution of a lumbar disc hernia of a pregnant woman focusing on the use of right lateral positioning, spinal anesthesia which has not previously been utilized in third trimester and discusses positioning options, and possible anesthesia methods with the surgical procedure options. METHODS: Case report. RESULTS: A left-sided L5/S1 lumbar disc hernia (verified by magnetic resonance imaging) of a 35-year-old, 32-week-pregnant woman with a deteriorating neurological status leading to cauda syndrome was treated successfully by microdiscectomy in right lateral position applying spinal anesthesia...
February 22, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29469988/dorsal-root-ganglia-volume-differentiate-schwannomatosis-and-neurofibromatosis-2
#2
Tim Godel, Victor-Felix Mautner, Said Farschtschi, Mirko Pham, Daniel Schwarz, Moritz Kronlage, Isabel Gugel, Sabine Heiland, Martin Bendszus, Philipp Bäumer
Schwannomatosis and neurofibromatosis type 2 are hereditary tumor syndromes and peripheral neuropathy has been reported in both. We prospectively applied in-vivo morphometric measurement of dorsal root ganglia volume in 16 schwannomatosis, 14 neurofibromatosis type 2 patients, and 26 healthy controls by MR-Neurography. Compared to healthy controls, dorsal root ganglia hypertrophy was a consistent finding in neurofibromatosis type 2 (L3: +267%, L4: +235%, L5: +241%, S1: +300% and S2: +242%, Bonferroni-adjusted p<0...
February 22, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29467995/transitional-female-sacrum-dimensions-alterations-in-dorsal-pelvic-structure-and-potential-obstetric-implications
#3
Niladri Kumar Mahato
Objectives: The space available within the female pelvis is determined by the morphology of all bony components constituting the pelvic skeleton. Although several studies have investigated the impact of hip-bone structural variations in on parturition, the potential effects of commonly occurring lumbosacral transitional vertebrae (LSTV) variations have been underreported. This descriptive morphometric study reports dimensions of the female sacrum associated LSTV variations and suggests their probable mechanistic effects on normal labor...
January 2018: Oman Medical Journal
https://www.readbyqxmd.com/read/29464461/tactile-feedback-can-be-used-to-redistribute-flexion-motion-across-spine-motion-segments
#4
Shawn M Beaudette, Brendan L Pinto, Stephen H M Brown
This experiment investigates the efficacy of tactile feedback in affecting changes to dynamic spine movements. A sample of (n = 24) young, healthy males were assessed while completing targeted spine flexion movements with instruction to minimize stretching of the skin beneath an applied tactile stimulus (liquid bandage). Localized tactile stimuli were placed bilaterally at either lumbar (L4), lower thoracic (T10) or upper thoracic (T4) levels. Results demonstrate that localized tactile feedback elicited a re-distribution of spine flexion movement across spine sub-sections (e...
February 20, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29461341/influence-of-the-initial-sagittal-lumbar-alignment-on-clinical-and-radiological-outcomes-of-single-level-lumbar-total-disc-replacements-at-a-minimum-two-year-follow-up
#5
Aymeric Faure, Marc Khalifé, Benjamin Thiebaut, François Roubineau, Charles Henri Flouzat Lachaniette, Arnaud Dubory
STUDY DESIGN: Retrospective cohort study OBJECTIVE.: To analyze the clinical and radiographic outcomes of patients undergoing a one-level lumbar total disc replacement (TDR), according to the initial sagittal alignment of the spine. SUMMARY OF BACKGROUND DATA: No authors have highlighted correlation between the initial spino-pelvic parameters and the postoperative outcome after a one-level TDR. METHODS: Seventy-eight patients were included: 14 TDR at L4-L5 and 64 TDR at L5-S1 level...
February 15, 2018: Spine
https://www.readbyqxmd.com/read/29456171/a-magnetic-resonance-imaging-framework-for-quantifying-intervertebral-disc-deformation-in-vivo-reliability-and-application-to-diurnal-variations-in-lumbar-disc-shape
#6
John T Martin, Alexander B Oldweiler, Charles E Spritzer, Brian J Soher, Melissa M Erickson, Adam P Goode, Louis E DeFrate
Low back pain is a significant socioeconomic burden in the United States and lumbar intervertebral disc degeneration is frequently implicated as a cause. The discs play an important mechanical role in the spine, yet the relationship between disc function and back pain is poorly defined. The objective of this work was to develop a technique using magnetic resonance imaging (MRI) and three-dimensional modeling to measure in vivo disc deformations. Using this method, we found that disc geometry was measurable with precision less than the in-plane dimensions of a voxel (≈100 µm, 10% of the MRI pixel size)...
February 9, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29451437/do-intraoperative-radiographs-predict-final-lumbar-sagittal-alignment-following-single-level-transforaminal-lumbar-interbody-fusion
#7
Khalid M I Salem, Aditya P Eranki, Scott Paquette, Michael Boyd, John Street, Brian K Kwon, Charles G Fisher, Marcel F Dvorak
OBJECTIVE The study aimed to determine if the intraoperative segmental lordosis (as calculated on a cross-table lateral radiograph following a single-level transforaminal lumbar interbody fusion [TLIF] for degenerative spondylolisthesis/low-grade isthmic spondylolisthesis) is maintained at discharge and at 6 months postsurgery. METHODS The authors reviewed images and medical records of patients ≥ 16 years of age with a diagnosis of an isolated single-level, low-grade spondylolisthesis (degenerative or isthmic) with symptomatic spinal stenosis treated between January 2008 and April 2014...
February 16, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29442100/predictors-of-deterioration-in-sagittal-balance-following-long-fusion-arthrodesis-to-l5-in-patients-with-adult-scoliosis
#8
Xianda Gao, Linfeng Wang, Changzhi Yan, Yanlong Gao, Yong Shen
BACKGROUND The aim of this study was to identify the predictors of deterioration in sagittal balance in patients with adult scoliosis following long fusion arthrodesis to L5. MATERIAL AND METHODS A retrospective clinical study included 63 patients with adult scoliosis who underwent long fusion arthrodesis to L5, between February 2005 and May 2015. Radiological imaging values included the angle of lumbar lordosis (LL), and the angle of pelvic incidence (PI). The patients were divided into two cohorts, according to the threshold of average loss of sagittal vertical axis (SVA): a cohort with stable sagittal balance (SSB) and a cohort with deteriorated sagittal balance (DSB)...
February 14, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29434454/sequential-spinal-and-intracranial-dural-metastases-in-gastric-adenocarcinoma-a-case-report
#9
Hongsik Kim, Kyung Sik Yi, Won-Dong Kim, Seung-Myoung Son, Yaewon Yang, Jihyun Kwon, Hye Sook Han
Dural metastasis from primary gastric adenocarcinoma has been rarely reported, and its prognosis is very poor because it frequently leads to acute subdural hematoma. Here, we describe a case with sequential spinal and cranial dural metastases from gastric adenocarcinoma without subdural hematoma. A 43-year-old woman with gastric adenocarcinoma and well-controlled peritoneal carcinomatosis presented with back pain, right radiating leg pain, left facial palsy, and hearing loss. Magnetic resonance imaging of the spine and brain revealed dural masses at the lumbosacral junction with invasion to the L5 and S1 nerve roots and at the skull base with invasion to the internal auditory canal...
February 7, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29433530/correlation-between-lumbar-intervertebral-disc-height-and-lumbar-spine-sagittal-alignment-among-asymptomatic-asian-young-adults
#10
Feng Zhang, Kai Zhang, Hai-Jun Tian, Ai-Min Wu, Xiao-Fei Cheng, Tang-Jun Zhou, Jie Zhao
BACKGROUND: To investigate the distribution and characteristics of the lumbar intervertebral disc height (IDH) in asymptomatic Asian population and to determine whether the lumbar IDH is related to the lumbar spine sagittal alignment. METHODS: A cohort of 169 cases of asymptomatic volunteers was enrolled from January 2014 to July 2016. All participants underwent magnetic resonance imaging of the lumbar spine and panoramic radiography of the spine. Panoramic radiographs of the spine were taken to evaluate pelvic incidence (PI), sacral slope (SS), and pelvic tilt (PT) using Surgimap® software...
February 12, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29432200/reliability-and-validity-of-lumbar-disc-height-quantification-methods-using-magnetic-resonance-images
#11
Vahid Abdollah, Eric C Parent, Michele C Battié
Disc height has been a focus of research on disc degeneration and low back pain (LBP). However, choosing an appropriate method to quantify disc height remains controversial. The aim of the present study was to determine the reliability and construct validity of disc height quantification methods. Repeated semi-automatic measurements of L4-5 and L5-S1 discs were obtained from 43 T2-weighted mid-sagittal 3T magnetic resonance (MR) images of 22 subjects with LBP (43±13 years), blinded to prior measurements. Heights were calculated with area-based methods (using 60%, 80% and 100% of the disc width), and point-based methods (Hurxthal's, Dabbs' and combining the two)...
February 13, 2018: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29424098/diagnosis-of-compressed-nerve-root-in-lumbar-disc-herniation-patients-by-surface-electromyography
#12
Wei Li, Yan-Cheng Liu, Chen-Fan Zheng, Jun Miao, Hui Chen, Hai-Ying Quan, Song-Hua Yan, Kuan Zhang
OBJECTIVE: To establish a logistic regression model using surface electromyography (SEMG) parameters for diagnosing the compressed nerve root at L 5 or S 1 level in patients with lumbar disc herniation (LDH). METHODS: This study recruited 24 patients with L 5 nerve root compression and 23 patients with S 1 nerve root compression caused by LDH from May 2014 to May 2016. SEMG signals from the bilateral tibialis anterior and lateral gastrocnemius were measured. The root mean square (RMS), the RMS peak time, the mean power frequency (MPF), and the median frequency (MF) were analyzed...
February 9, 2018: Orthopaedic Surgery
https://www.readbyqxmd.com/read/29416151/pre-procedure-ultrasound-guided-paramedian-spinal-anaesthesia-at-l5-s1-is-this-better-than-landmark-guided-midline-approach-a-randomised-controlled-trial
#13
Karthikeyan Kallidaikurichi Srinivasan, Anne-Marie Leo, Gabriella Iohom, Frank Loughnane, Peter J Lee
Background and Aims: Routine use of pre-procedural ultrasound guided midline approach has not shown to improve success rate in administering subarachnoid block. The study hypothesis was that the routine use of pre-procedural (not real time) ultrasound-guided paramedian spinals at L5-S1 interspace could reduce the number of passes (i.e., withdrawal and redirection of spinal needle without exiting the skin) required to enter the subarachnoid space when compared to the conventional landmark-guided midline approach...
January 2018: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/29405776/the-safe-use-of-long-screws-in-l5-s1-stand-alone-anterior-interbody-fusion-for-olisthesis-cases
#14
Matthias A König, Michael P Grevitt, Nasir A Quraishi, Bronek M Boszczyk
BACKGROUND: Stand-alone anterior interbody fusion (STALIF) with poly-ether-ether-ketone (PEEK) cages could offer a treatment option in olisthesis cases. The fixation of the PEEK-cage at the L5/S1 inferior endplate with long divergent screws however might endanger neural sacral structures, especially the S1 nerve root. If shorter screws are used, the achieved bony purchase might not be sufficient to resist the pull out and shear forces at the lumbosacral junction. The aim of the present investigation was to evaluate the use of long screws in PEEK-cages for olisthesis cases at the L5/S1 segment and its neurological complications...
February 6, 2018: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/29402403/statistical-shape-modeling-characterizes-three-dimensional-shape-and-alignment-variability-in-the-lumbar-spine
#15
Justin F M Hollenbeck, Christopher M Cain, Jill A Fattor, Paul J Rullkoetter, Peter J Laz
The mechanics of the lumbar spine are heavily dependent on the underlying anatomy. Anatomical measures are used to assess the progression of pathologies related to low back pain and to screen patients for surgical treatment options. To describe anatomical norms and pathological differences for the population, statistical shape modeling, which uses full three-dimensional representations of bone morphology and relative alignment, can capture intersubject variability and enable comparative evaluations of subject to population...
February 2, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29395230/effects-of-intervertebral-disc-lesion-and-multifidus-muscle-resection-on-the-structure-of-the-lumbar-intervertebral-discs-and-paraspinal-musculature-of-the-rat
#16
Huub Maas, Wendy Noort, Paul W Hodges, Jaap van Dieën
The aim of this study was to investigate whether elimination of multifidus muscle in rats causes intervertebral disc (IVD) degeneration similar to that found after IVD lesion. Data were obtained from 36 male Wistar rats randomly assigned to one of three groups: (i) IVD lesion, in which the L4/L5 IVD was stabbed; (ii) multifidus muscle resection, in which all multifidus tissue between L3 and L6 was excised bilaterally; (iii) control, in which no intervention was applied. At 7, 14, and 28 days post-intervention, L4/L5 IVDs were harvested for histological analysis; left and right multifidus fascicles between L3 and S1 (from control and IVD lesion animals) and medial longissimus between L1 and S3 (from all animals) were dissected and weighed...
January 12, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29386033/clinical-comparison-of-unilateral-biportal-endoscopic-technique-versus-open-microdiscectomy-for-single-level-lumbar-discectomy-a-multicenter-retrospective-analysis
#17
Seung-Kook Kim, Sang-Soo Kang, Young-Ho Hong, Seung-Woo Park, Su-Chan Lee
BACKGROUND: The unilateral biportal endoscopic (UBE) technique is a minimally invasive procedure for spinal surgery, while open microscopic discectomy is the most common surgical treatment for ruptured or herniated discs of the lumbar spine. A new endoscopic technique that uses a UBE approach has been applied to conventional arthroscopic systems for the treatment of spinal disease. In this study, we aimed to compare and evaluate the perioperative parameters and clinical outcomes, including recovery from surgery, pain and life quality modification, patient's satisfaction, and complications, between UBE and open lumbar microdiscectomy (OLM) for single-level discectomy procedures...
January 31, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29384189/percutaneous-endoscopic-interlaminar-discectomy-for-l5-s1-adolescent-lumbar-disc-herniation
#18
Zheng Xu, Yi Liu, Jinchuan Chen
AIM: L5/S1 Adolescent lumbar disc herniation (ALDH) is usually ignored for its low incidence. Recently, percutaneous endoscopic procedures have been widely used. The aim of the study was to investigate the surgical techniques and clinical outcomes of percutaneous endoscopic interlaminar discectomy (PEID) in the treatment of L5/S1 (ALDH). MATERIAL AND METHODS: A retrospective study was performed between May 2012 to September 2014, which included 23 adolescent patients who underwent PEID for L5/S1 lumbar disc herniation...
December 28, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/29382297/awareness-of-middle-sacral-artery-pathway-a-cadaveric-study-of-the-presacral-area
#19
Weerasak Singhatanadgige, Daniel G Kang, Dol Wiranuwat, Chotetawan Tanavalee, Wicharn Yingsakmongkol, Worawat Limthongkul
PURPOSE: To assess the anatomic path of the middle sacral artery (MSA) at the presacral area and its relationship to the spinal midline during an axial lumbar interbody fusion (AxiaLif) approach. METHODS: Fifty human cadavers (25 males, 25 females) were used in this study. A transabdominal approach was used to expose the anterior aspect of the L5/S1 intervertebral disc and the presacral space. We measured the size and distance from the spinal midline at the following positions: (a) middle of the L5/S1 disc level, (b) 1 cm below the sacral promontory (SP), and (c) 2 cm below the SP...
January 2018: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29379999/lumbar-paraspinal-muscle-fat-infiltration-is-independently-associated-with-sex-age-and-inter-vertebral-disc-degeneration-in-symptomatic-patients
#20
Julio Urrutia, Pablo Besa, Daniel Lobos, Mauricio Campos, Cristobal Arrieta, Marcelo Andia, Sergio Uribe
PURPOSE: To determine the association of paraspinal muscles and psoas relative cross-sectional area (RCSA) and fat signal fraction (FSF) with sex, age, and intervertebral disc degeneration (IDD) in symptomatic patients. METHODS: We retrospectively evaluated 80 adult patients with spinal symptoms using T2-weighted magnetic resonance images. We determined RCSA and FSF of the paraspinal muscles (erector spinae and multifidus) and psoas from L1-L2 to L5-S1; we determined IDD using the Pfirrmann classification...
January 29, 2018: Skeletal Radiology
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