scholarly journals High pelvic incidence and gender increase risk of pedicle fracture after single level lumbar spinal fusion: A case-control study

2021 ◽  
Vol 1 ◽  
pp. 100197
Author(s):  
Florian Wanivenhaus ◽  
David Ephraim Bauer ◽  
Christoph Laux ◽  
Christoph Stern ◽  
Frédéric Cornaz ◽  
...  
Keyword(s):  
Spinal Fusion ◽  
Case Control Study ◽  
Pelvic Incidence ◽  
Case Control ◽  
Lumbar Spinal Fusion ◽  
Single Level ◽  
Increase Risk ◽  
And Gender ◽  
Lumbar Spinal ◽  
Control Study

scholarly journals Association of bone mineral density with reoperation rate following instrumented lumbar spinal fusion: a retrospective cohort and case-control study

2019 ◽  
Author(s):  
Maximilian Thomas Löffler ◽  
Niklas Loreck ◽  
Nico Sollmann ◽  
Johannes Kaesmacher ◽  
Felix Zibold ◽  
...  
Keyword(s):  
Case Control Study ◽  
Cohort Analysis ◽  
Case Control ◽  
Control Analysis ◽  
Lumbar Spinal Fusion ◽  
Mineral Density ◽  
Lumbar Spinal ◽  
Case Control Analysis ◽  
Prevalence Of Osteoporosis ◽  
Control Study

Abstract Background Low bone mineral density (BMD) is believed to influence the outcome of instrumented spinal surgery and can lead to reoperation. Purpose of this retrospective cohort and case-control study was to investigate the association of BMD with the risk of reoperation following instrumented lumbar spinal fusion (LSF). Methods For the cohort analysis, 81 patients were included who received LSF with and without polymethyl methacrylate (PMMA)-augmentation. For the case-control analysis, 18 patients who had reoperation following LSF were matched to 26 patients who did not have reoperation (matching criteria: sex, age ± 5 years, fused levels, and augmentation). Opportunistic BMD screening was performed in perioperative CT scans using asynchronous calibration. Mean BMD was compared between patients with and without reoperation in augmented and non-augmented surgeries. Results In the cohort analysis, prevalence of osteoporosis (BMD < 80 mg/cm³) was 29% in non-augmented and 85% in augmented LSF. Seven of 48 patients with non-augmented (15%) and 4 of 33 patients with augmented LSF (12%) had reoperation. In non-augmented LSF, patients with reoperation had significantly lower BMD than patients without reoperation (p = 0.005). In the case-control analysis, patients with reoperation presented numerically lower BMD of 78.8 ± 33.1 mg/cm³ than patients without reoperation with BMD of 89.4 ± 39.7 mg/cm³ (p = 0.357).Conclusions Prevalence of osteoporosis in patients undergoing LSF is relatively high. Patients with reoperation following LSF showed slightly lower BMD compared to matched patients without reoperation, but the difference was not statistically significant. Opportunistic BMD screening in preoperative CT is feasible and can provide valuable information about osteoporotic bone status.

The Identification and Significance of a Thr→Pro Polymorphism in Kringle IV Type 8 of Apolipoprotein(a)

1997 ◽  
Vol 77 (05) ◽  
pp. 0949-0954 ◽  
Author(s):  
J Prins ◽  
F R Lues ◽  
Y Y van der Hoek ◽  
J J.P Kastelein ◽  
B N Bouma ◽  
...  
Keyword(s):  
Case Control Study ◽  
Amino Acid Position ◽  
Case Control ◽  
Binding Studies ◽  
Binding Characteristics ◽  
Apolipoprotein A ◽  
Significant Independent Risk Factor ◽  
And Gender ◽  
Control Study

SummaryElevated plasma levels of lipoprotein(a) [Lp(a)] represent a significant independent risk factor for the development of atherosclerosis. Interindividual levels of apo(a) vary over 1000-fold and are mainly due to inheritance that is linked to the locus of the apolipoprotein(a) [apo(a)] gene. The apo(a) gene encodes multiple repeats of a sequence exhibiting up to 85% DNA sequence homology with plasminogen kringle IV (K.IV), a lysine binding domain. In our search for sequence polymorphisms in the K.IV coding domain, we identified a polymorphism predicting a Thr→Pro substitution located at amino acid position 12 of kringle IV type 8 of apo(a). The functional and clinical significance of this polymorphism was analysed in a case-control study and by comparing the in vitro lysine binding characteristics of the two Lp(a) subtypes.The case-control study (involving 153 subjects having symptomatic atherosclerosis and 153 age and gender matched normolipidemic controls) revealed an overall allele frequency for the Thr12-→Pro substitution in kringle IV type 8 of 14% and a negative association between presence of the Pro12-subtype and symptomatic atherosclerosis (p <0.03). The in vitro lysine binding studies, using Lp(a) isolated from subjects homozygous for either Thr12 or Pro12 in K.IV type 8, revealed comparable lysine-Sepharose binding fractions for the two subtypes. The binding affinity (Kd) for immobilised plasmin degraded des- AA-fibrin (DesafibTM-X) was also comparable for the two subtypes, however a decreased maximal attainable binding (Bmax) for immobilised desafibTM-X was observed for the Pro12-subtype Lp(a).

scholarly journals Safety and Effectiveness of Transforaminal Epiduroscopic Laser Ablation in Single Level Disc Disease: A Case-Control Study

2018 ◽  
Vol 1 (21;1) ◽  
pp. E643-E650
Author(s):  
Dong Ah Shin
Keyword(s):  
Laser Ablation ◽  
Nucleus Pulposus ◽  
Case Control Study ◽  
Case Control ◽  
Small Sample ◽  
Control Group ◽  
Disc Disease ◽  
Single Level ◽  
The Mean ◽  
Control Study

Background: The non-operative treatment of herniated intervertebral discs has long been a fundamental challenge. A novel technique of laser ablation to ablate the nucleus pulposus under a transforaminal epiduroscope (TELA system, Lutronics, Seoul, Republic of Korea) was recently developed. Objective: The purpose of this study was to evaluate the safety and effectiveness of transforaminal epiduroscopic laser ablation (TELA) for selective ablation of the nucleus pulposus in single-level disc disease. Study Design: Prospective case control study Setting: Multicenter study Methods: This study included a group of 56 patients who underwent transforaminal epiduroscopic laser ablation (TELA) and 56 patients who underwent selective transforaminal epidural block (STEB) for single-level disc disease. Visual analog scale (VAS), Oswestry Disability Index (ODI), and SF-12 were assessed at admission and at 1, 3, 6, and 12 months postoperatively. Results: The mean VAS of back pain was lower for the TELA group than for the STEB group 12 months postoperative (P < 0.05). The mean ODI was lower in the TELA group than in the STEB group at 12 months postoperatively (P < 0.05). There were no major complications related to the TELA and STEB procedures. Limitations: The primary limitation is a small sample size. The control group was created from a database which was prospectively collected in a different time line. Conclusions: The TELA procedure is superior to the STEB procedure in terms of patients reporting less pain and better quality of life over a year. TELA may be a reasonable alternative to conventional interventions or open surgery in single-level disc disease. Key words: Laser-assisted spinal endoscopy, disc decompression, Nd:YAG laser, laser ablation, intervertebral disc disease, lumbar spine

The effect of tonsillectomy on John Cunningham virus serological status in multiple sclerosis patients: A retrospective case–control study

2020 ◽  
pp. 135245852097182
Author(s):  
Mirla Avila ◽  
Annette Okai ◽  
Smathorn Thakolwiboon ◽  
Collin O’Bryan ◽  
Murali Mohan Reddy Gopireddy ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Case Control Study ◽  
The United States ◽  
Case Control ◽  
Retrospective Case ◽  
John Cunningham Virus ◽  
Long Term Effect ◽  
And Gender ◽  
Multiple Sclerosis Patients ◽  
Control Study

Tonsils are believed to be the initial site of the John Cunningham virus (JCV) infection. The long-term effect of childhood tonsillectomy on JCV status in multiple sclerosis (MS) patients has not been investigated. In this retrospective case–control study, we analyzed data of 144 JCV seropositive cases and 82 JCV seronegative controls from three outpatient MS clinics in the United States. Early tonsillectomy (before the age of 8) was reported among 8 (5.56%) JCV seropositive subjects and 19 (23.17%) controls. Early tonsillectomy was associated with JCV negative status (adjusted odds ratio = 5.39, 95% confidence interval = 2.13–13.62, p < 0.001) independent of age and gender.

Potential pathological mechanisms of L3 degenerative spondylolisthesis in lumbar spinal stenosis patients: A case–control study

2019 ◽  
Vol 24 (4) ◽  
pp. 596-600
Author(s):  
Masayoshi Fukushima ◽  
Yasushi Oshima ◽  
Hiroyuki Oka ◽  
Chang Chang ◽  
Yoshitaka Matsubayashi ◽  
...  
Keyword(s):  
Spinal Stenosis ◽  
Lumbar Spinal Stenosis ◽  
Case Control Study ◽  
Degenerative Spondylolisthesis ◽  
Case Control ◽  
Lumbar Spinal ◽  
Control Study
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