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Harrington Rod

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https://www.readbyqxmd.com/read/29328186/single-crystal-er-3-yag-fibers-with-tailored-refractive-index-profiles
#1
L Cheng, T Chick, J Chapman, E F C Dreyer, C D Nie, S Bera, J A Harrington, S C Rand
Erbium-doped yttrium aluminum garnet (Er3+ :YAG) rods were inserted inside undoped tubes and grown into single-crystal fibers of a diameter of 300 μm using the laser-heated pedestal growth technique. Growth at various rates resulted in radially graded distributions of Er3+ dopant ions, as observed using laser-induced fluorescence imaging. Profiles of the refractive index were measured using cross-sectional reflectometry in a microscope. Dopant distributions and the corresponding index profiles were compared with thermal diffusion theory to determine the inter-diffusion coefficient of Y3+ and Er3+ ions at 2000°C, yielding an estimated value of D=(9...
January 10, 2018: Applied Optics
https://www.readbyqxmd.com/read/29305546/multicenter-evaluation-of-the-accelerate-phenotest-bc-kit-for-rapid-identification-and-phenotypic-antimicrobial-susceptibility-testing-using-morphokinetic-cellular-analysis
#2
Preeti Pancholi, Karen C Carroll, Blake W Buchan, Raymond C Chan, Neelam Dhiman, Bradley Ford, Paul A Granato, Amanda T Harrington, Diana R Hernandez, Romney M Humphries, Matthew R Jindra, Nathan A Ledeboer, Shelley A Miller, A Brian Mochon, Margie A Morgan, Robin Patel, Paul C Schreckenberger, Paul D Stamper, Patricia J Simner, Nancy E Tucci, Cynthia Zimmerman, Donna M Wolk
We describe results from a multicenter study evaluating the Accelerate Pheno system, a first of its kind diagnostic system that rapidly identifies common bloodstream pathogens from positive blood cultures within 90 min and determines bacterial phenotypic antimicrobial susceptibility testing (AST) results within ∼7 h. A combination of fresh clinical and seeded blood cultures were tested, and results from the Accelerate Pheno system were compared to Vitek 2 results for identification (ID) and broth microdilution or disk diffusion for AST...
April 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29033731/ultrasound-guided-continuous-spinal-anesthesia-for-cesarean-section-in-a-parturient-with-scoliosis-corrected-with-harrington-s-rod-surgery
#3
Amer Majeed, Iftikhar Ahmed, Ghadah Jamaan Alkahtani, Nasser Abdullah Altahtam
With rapid improvement in healthcare in Saudi Arabia, increasing number of women with surgically corrected kyphoscoliosis are likely to present for cesarean section (CS) or vaginal delivery requiring anesthesia or analgesia. Despite the surgical correction, these patients have poor cardiopulmonary reserves which increase the risks associated with general anesthesia. Whereas altered vertebral anatomy from previous surgery and the presence of metal work in spine make performing of regional anesthesia (RA) difficult and unpredictable, we report anesthetic management of such a patient who underwent CS using continuous spinal anesthesia technique...
October 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28887681/pediatric-spine-imaging-post-scoliosis-surgery
#4
Alaa N Alsharief, Ron El-Hawary, Pierre Schmit
Many orthopedic articles describe advances in surgical techniques and implants used in pediatric scoliosis surgery. However, even though postoperative spine imaging constitutes a large portion of outpatient musculoskeletal pediatric radiology, few, if any, radiology articles discuss this topic. There has been interval advancement over the last decades of the orthopedic procedures used in the treatment of spinal scoliosis in adolescents with idiopathic scoliosis. The goal of treatment in these patients is to stop the progression of the curve by blocking the spinal growth and correcting the deformity as much as possible...
January 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/28885124/thoracic-spinal-cord-impingement-by-an-arachnoid-web-at-the-level-of-a-hemivertebra-case-report
#5
Molly E Hubbard, Matthew A Hunt, Kristen E Jones, David W Polly
Congenital scoliosis due to a hemivertebra requires surgical stabilization prior to skeletal maturity if rapidly progressive curve growth occurs. Here the authors present the unique case of a man who, at the age of 12 years, had undergone Harrington rod placement for stabilization of progressive congenital scoliosis due to a T-11 hemivertebra and then, at the age of 53 years, presented with acutely progressive myelopathy due to spinal cord compression from an arachnoid web at T-11 despite a solid fusion mass at the prior surgical site...
December 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28624897/corrosion-of-harrington-rod-in-idiopathic-scoliosis-long-term-effects
#6
Beth Sherman, Tanya Crowell
PURPOSE: Metal implants have been used to treat adolescent idiopathic scoliosis since the 1960s. Only recently, however, it has the issue of metal-bone breakdown secondary to metal corrosion in situ come to light, raising concerns of possible long-term complications from the resulting metallosis and inflammation of spinal tissues. We present a case of a patient with neurological deficit, pain, and disability with Harrington rod in place for over 30 years, to bring attention to the issue of bio-corrosion of metal implants and its effect on human tissue...
June 17, 2017: European Spine Journal
https://www.readbyqxmd.com/read/27943228/history-of-spine-deformity-in-turkey
#7
Sait Naderi, Gulten Dinc
Spine deformities are among the most important spinal disorders, affecting health-related life quality. Although there are some studies in past centuries, most spine deformity-related studies and research has started in the last century. Many surgical techniques, performed between 1960 and 1990, made scoliosis a touchable pathology. These techniques started with Harrington"s system, wiring techniques, pedicle screw techniques, and all other universal techniques. Anterior and 360 degree techniques contributed to this process...
2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/27834583/spinal-cord-injury-and-seated-postural-control-a-test-of-the-rambling-and-trembling-hypothesis
#8
Sunghoon Shin, Jacob J Sosnoff
Rambling-trembling analysis separates the center of pressure into two components: the rambling component (RM: supraspinal) and trembling component (TM: muscle stiffness/reflex). We hypothesized that persons with spinal cord injury (SCI) would demonstrate decreased RM resulting from altered supraspinal processing and increased TM resulting from increased muscle stiffness. We also anticipated that the TM component would be greater in SCI patients with Harrington rods than in those without them. The seated postural control was assessed in 18 persons with SCI, comprising 12 with and six without Harrington rods, and 18 age-matched controls...
October 1, 2017: Motor Control
https://www.readbyqxmd.com/read/27551692/fifteen-to-twenty-five-year-functional-outcomes-of-twenty-two-patients-treated-with-posterior-cotrel-dubousset-type-instrumentation-a-limited-but-detailed-review-of-outcomes
#9
William F Lavelle, Andy A Beltran, Allen L Carl, Richard L Uhl, Khalid Hesham, Stephen A Albanese
BACKGROUND: Long-term outcomes of patients undergoing extensive fusions for adolescent idiopathic scoliosis (AIS) have conflicting results. Moskowitz found uninstrumented scoliosis fusion patients had similar back pain as a normal age matched population. Recently, long-term outcomes of patients with Harrington rod instrumentation were reviewed and found similar functional outcome scores to non-scoliosis patients, with trending toward worse outcomes when fusions extended to L4. Our study examined long-term functional outcomes of patients treated with Cotrel-Dubousset (CD) instrumentation and determined whether distal level of instrumented fusion (L4 and L5) correlate with increased back pain or lower functional level...
2016: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/27374847/spines-of-steel-a-case-of-surgical-enthusiasm-in-cold-war-america
#10
Beth Linker
Just as the prevalence of scoliosis began to decline precipitously after World War II, American orthopedic surgeon Dr. Paul R. Harrington devised a new, invasive surgical system whereby implantable prosthetic metal rods and hooks were used to straighten curved backs. By the 1970s, "Harrington rods" had become the gold standard of surgical scoliosis care in the United States, replacing more conventional methods of exercise, bracing, and casting. This article situates the success of Harrington rods within a much larger and historically longer debate about why, when compared to those in other nations, American surgeons appear to be "more aggressive" and "knife-happy...
2016: Bulletin of the History of Medicine
https://www.readbyqxmd.com/read/27074067/laminectomy-plus-fusion-versus-laminectomy-alone-for-lumbar-spondylolisthesis
#11
RANDOMIZED CONTROLLED TRIAL
Zoher Ghogawala, James Dziura, William E Butler, Feng Dai, Norma Terrin, Subu N Magge, Jean-Valery C E Coumans, J Fred Harrington, Sepideh Amin-Hanjani, J Sanford Schwartz, Volker K H Sonntag, Fred G Barker, Edward C Benzel
BACKGROUND: The comparative effectiveness of performing instrumented (rigid pedicle screws affixed to titanium alloy rods) lumbar spinal fusion in addition to decompressive laminectomy in patients with symptomatic lumbar grade I degenerative spondylolisthesis with spinal stenosis is unknown. METHODS: In this randomized, controlled trial, we assigned patients, 50 to 80 years of age, who had stable degenerative spondylolisthesis (degree of spondylolisthesis, 3 to 14 mm) and symptomatic lumbar spinal stenosis to undergo either decompressive laminectomy alone (decompression-alone group) or laminectomy with posterolateral instrumented fusion (fusion group)...
April 14, 2016: New England Journal of Medicine
https://www.readbyqxmd.com/read/26378268/pelvic-fixation-in-adult-and-pediatric-spine-surgery-historical-perspective-indications-and-techniques-aaos-exhibit-selection
#12
REVIEW
Amit Jain, Hamid Hassanzadeh, Sophia A Strike, Emmanuel N Menga, Paul D Sponseller, Khaled M Kebaish
Achieving solid osseous fusion across the lumbosacral junction has historically been, and continues to be, a challenge in spine surgery. Robust pelvic fixation plays an integral role in achieving this goal. The goals of this review are to describe the history of and indications for spinopelvic fixation, examine conventional spinopelvic fixation techniques, and review the newer S2-alar-iliac technique and its outcomes in adult and pediatric patients with spinal deformity. Since the introduction of Harrington rods in the 1960s, spinal instrumentation has evolved substantially...
September 16, 2015: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/26180541/health-related-quality-of-life-in-adolescent-idiopathic-scoliosis-patients-25%C3%A2-years-after-treatment
#13
Ane Simony, Emil Jesper Hansen, Leah Y Carreon, Steen Bach Christensen, Mikkel Osterheden Andersen
BACKGROUND: Since 1962 to the mid eighties the Harrington Rod instrumentation was the Golden standard for surgical treatment of Adolescent Idiopathic Scoliosis (AIS). The Boston braces were introduced in the 1970´s and are still used as a conservative treatment, for curves less than 40°. Very few long-term studies exists, focusing on the health related quality of life. The purpose of this study was to evaluate the long-term health related outcome, in a cohort of AIS patients, treated 25 years ago...
2015: Scoliosis
https://www.readbyqxmd.com/read/25996533/minimum-20-years-long-term-clinical-outcome-after-spinal-fusion-and-instrumentation-for-scoliosis-comparison-of-the-srs-22-patient-questionnaire-with-that-in-nonscoliosis-group
#14
COMPARATIVE STUDY
Takahiro Iida, Nobumasa Suzuki, Katsuki Kono, Yasumasa Ohyama, Jyunya Imura, Akihisa Ato, Satoru Ozeki, Yutaka Nohara
STUDY DESIGN: A retrospective minimum 20-year follow-up study using 4 standard self-administered questionnaires, one of which, the SRS-22 was also administered to control groups. OBJECTIVE: To evaluate long-term postoperative pain and other clinical outcomes of scoliosis correction and fusion surgery with Harrington instrumentation using Moe square-ended rods for better preservation of sagittal alignment. SUMMARY OF BACKGROUND DATA: Only a few long-term outcome studies have used standardized and validated self-administered tools, and no studies have established SRS-22 control data within their own population...
August 15, 2015: Spine
https://www.readbyqxmd.com/read/25851684/utilizing-the-stable-to-be-vertebra-saves-motion-segments-in-growing-rods-treatment-for-early-onset-scoliosis
#15
COMPARATIVE STUDY
Ozgur Dede, Gokhan Demirkiran, Senol Bekmez, Peter F Sturm, Muharrem Yazici
BACKGROUND: There is no consensus on the selection of distal instrumentation levels in growing rod surgery. Many surgeons utilize the stable zone of Harrington, but there is not overwhelming evidence to support this preference. The aim of this study was to determine the value of bending/traction radiographs in selection of distal instrumentation levels of a growing rod construct in children with idiopathic or idiopathic-like early-onset scoliosis (EOS). METHODS: Twenty-three consecutive patients with idiopathic or idiopathic-like EOS who underwent growing rod surgery at 2 separate institutions between 2006 and 2011 were included...
June 2016: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/25750955/harrington-rod-revision-after-failed-total-hip-arthroplasty-due-to-missed-acetabular-metastasis
#16
Phillip R Ross, Gregory P Kolovich, Joel L Mayerson
We report the case of a 61-year-old woman who was referred to our service after she received a total hip implant at another institution and was found to have a large acetabular defect from pulmonary metastasis. The patient elected to undergo palliative surgical curettage and fixation. We describe a technique to create a cement construct reinforced with Steinmann pins that reduces pain and offers improved mobility.
March 2015: American Journal of Orthopedics
https://www.readbyqxmd.com/read/25499809/anesthetic-management-of-parturients-with-pre-existing-paraplegia-or-tetraplegia-a-case-series
#17
E E Sharpe, K W Arendt, A K Jacob, J J Pasternak
With improvements in management and rehabilitation, more women with spinal cord injury are conceiving children. Physiologic manifestations of spinal cord injury can complicate anesthetic management during labor and delivery. Patients who delivered at Mayo Clinic, Rochester, Minnesota between January 1, 2001 and May 31, 2012 with a history of traumatic spinal cord injury were identified via electronic record search of all parturients. Eight patients undergoing nine deliveries were identified. Six deliveries (67%) among five patients (63%) involved a trial of labor...
February 2015: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/25228352/historical-review-suspension-therapy-for-the-treatment-of-tabes-dorsalis
#18
REVIEW
Marie-France Weiner, John Russell Silver
BACKGROUND: Suspension therapy was developed by a Russian doctor, A. Motschutkovsky and at the end of the 19th century it was a popular treatment for tabes dorsalis. It was endorsed by Jean-Martin Charcot in France and Weir Mitchell in the United States; but after 10 years, it was abandoned because it proved to be useless and some patients developed paralysis. SUMMARY: The effect of suspension upon a spinal cord affected by tabes dorsalis and a healthy spinal cord has been analyzed in the light of current knowledge...
2014: European Neurology
https://www.readbyqxmd.com/read/24822472/measurement-of-internal-fixation-device-support-in-experimentally-produced-fractures-of-the-dorsolumbar-spine
#19
EDITORIAL
M S Pinzur, P R Meyer, E P Lautenschlager, J C Keller, W Dobozi, J Lewis
A reproducible flexion injury was induced in ten fresh cadaver spine preparations via four-point loading with continuous recording of load-deformation characteristics and additional monitoring by high speed photography. Each spine was then stabilized with Weiss springs, Harrington distraction rods and Harrington compression rods, and tested in a same manner.13 The elastic modulus of each instrumented spine system was compared to the preinjured state and to each of the devices tested. Fixation with Harrington compression rods had the highest elastic modulus, ie, was the most stiff, of the devices tested, yet failed with the least amount of displacement...
January 1, 1979: Orthopedics
https://www.readbyqxmd.com/read/24728975/posterior-spinal-fusion-to-sacrum-in-non-ambulatory-hypotonic-neuromuscular-patients-sacral-rod-bone-graft-onlay-method
#20
Theresa Bui, Frederic Shapiro
PURPOSE: A retrospective study involving 65 non-ambulatory patients with hypotonic neuromuscular scoliosis has assessed the effectiveness of a sacral rod/bone onlay technique for extending spinal fusion to the sacrum. METHODS: To extend posterior spinal fusion to the sacrum, we used either 1 Harrington rod and 1 Luque L rod with sublaminar wires in 14 patients (Group 1) or two rods with sublaminar wires in 51 patients (Group 2) along with abundant autograft and allograft bone covering the ends of the rods...
May 2014: Journal of Children's Orthopaedics
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