19,912 results match your criteria performancetwo instrumented


Effect of thermodilution injectate volume and temperature on the accuracy and precision of cardiac output measurements for healthy anesthetized horses.

Am J Vet Res 2021 Oct;82(10):818-822

Objective: To compare the accuracy and precision of cardiac output (CO) measurements derived from 4 thermodilution protocols that used different injectate temperatures and volumes in healthy adult horses.

Animals: 8 healthy adult horses.

Procedures: Horses were anesthetized and instrumented with Swan-Ganz catheters. Read More

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October 2021

Is the Implant in Bone? The Accuracy of CT and Fluoroscopic Imaging for Detecting Malpositioned Pelvic Screw and SI Fusion Implants.

Iowa Orthop J 2021 ;41(1):89-94

Department of Orthopedic Surgery, University of Minnesota, Minneapolis, MN, USA.

Background: Spine fusions to the pelvis have been associated with increased strain to the sacroiliac joint (SI) and possibly continued postoperative low back pain. To minimize this, concomitant SI joint fusion at the time of lumbopelvic fixation has been advocated. This requires concomitant placement of sacral alar iliac screws (S2AI) for lumbopelvic fixation and triangular titanium rods (TTR) for the SI joint fusion. Read More

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January 2021

Comparative Analysis of Unilateral versus Bilateral Instrumentation in TLIF for Lumbar Degenerative Disorder: Single Center Large Series.

Int J Spine Surg 2021 Sep 22. Epub 2021 Sep 22.

Apollo Hospital, Chennai, India.

Background: Transforaminal lumbar interbody fusion (TLIF) with bilateral pedicle screw instrumentation is a well-accepted technique in lumbar degenerative disc disorder. Unilateral instrumentation in TLIF has been reported in the literature. This study aims to compare the clinical and radiological outcomes of unilateral and bilateral instrumented TLIF in a selected series of patients. Read More

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September 2021

Distal Junctional Failure Secondary to Nontraumatic Fracture of Lower Instrumented Vertebra: Our Experience and Review of Literature.

Int J Spine Surg 2021 Sep 22. Epub 2021 Sep 22.

Department of Spine Surgery, Institute of Neurosciences, Sakra World Hospital, Bellandur, Bangalore, India.

Background: Junctional kyphosis (JK) is usually observed in long-level instrumented fusion surgeries. Various contributing factors are proposed, the pre-existing and postoperative spinal imbalance is considered as the single most important factor for the development of JK in adult spinal deformity surgeries. Distal JK (DJK) is seldom reported compared to proximal JK (PJK), and scarce literature exists. Read More

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September 2021

Efficacy of Anterior Vertebral Body Tethering in Skeletally Mature Children with Adolescent Idiopathic Scoliosis: A Preliminary Report.

Int J Spine Surg 2021 Sep 22. Epub 2021 Sep 22.

Apollo Hospital, Chennai, India.

Background: Anterior vertebral body tethering (AVBT) offers a dynamic fusion less correction option for children with adolescent idiopathic scoliosis (AIS). Few existing clinical studies evaluating novel AVBT in skeletally immature children have questioned the midterm efficacy with concerns of overcorrection and curve progression with remaining growth. The current study investigates the effect of this technique in skeletally mature children (Risser ≥ 4 and Sanders ≥ 7) with AIS with limited remaining growth potential. Read More

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September 2021

[Clinical study of selection of the upper instrumented vertebra at one level caudal to upper end vertebra in patients with Lenke 5C adolescent idiopathic scoliosis].

Zhonghua Yi Xue Za Zhi 2021 Sep;101(35):2772-2777

Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China.

To investigate whether the upper instrumented vertebra (UIV) can be selected at one level caudal to upper end vertebra (UEV) in Lenke type 5C adolescent idiopathic scoliosis (AIS) patients. Total of 28 Lenke 5C AIS patients who underwent selective posterior fusion in Drum Tower Hospital of Nanjing University Medical School from September 2013 to September 2015 were included. There were 4 males and 24 females, with an age of (15. Read More

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September 2021

Versatile GCH Control Software for Correction of Loads Applied to Forearm Crutches During Gait Recovery Through Technological Feedback: Development and Implementation Study.

J Med Internet Res 2021 Sep 22;23(9):e27602. Epub 2021 Sep 22.

Department of Nursing and Physiotherapy, Empowering Health by Physical Activity, Exercise and Nutrition Research Group CTS-1038, University of Cadiz, Cadiz, Spain.

Background: Measuring weight bearing is an essential aspect of clinical care for lower limb injuries such as sprains or meniscopathy surgeries. This care often involves the use of forearm crutches for partial loads progressing to full loads. Therefore, feasible methods of load monitoring for daily clinical use are needed. Read More

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September 2021

Eight-year Microtensile Bond Strength to Dentin and Interfacial Nanomechanical Properties of a One-step Adhesive.

J Adhes Dent 2021 Oct;23(5):461-467

Purpose: To evaluate the microtensile bond strength (µTBS) of a one-step self-etch adhesive (1-SEA) to dentin and its interfacial nanomechanical properties after 8 years of water storage.

Materials And Methods: Flat coronal dentin surfaces of extracted human third molars were bonded with a 1-SEA (Clearfil S3 Bond Plus, CS3+) and built up with a hybrid resin composite (Clearfil AP-X). After storage in water for 24 h or 8 years, non-trimmed stick-shaped specimens were fabricated from the central part of each bonded tooth and subjected to the µTBS test at a crosshead speed of 1. Read More

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October 2021

Can changes of workrate and seat position affect frontal and sagittal plane knee biomechanics in recumbent cycling?

Sports Biomech 2021 Sep 22:1-16. Epub 2021 Sep 22.

Department of Kinesiology, Recreation and Sport Studies, The University of Tennessee, Knoxville, TN, USA.

Changes in the workrate and seat position have been linked to changes in internal knee extension moment. However, there is limited research on effects of those changes on knee kinetics in recumbent bike. The purpose of this study was to examine the effects of different seat positions and workrates on KAbM, knee extension moment and perceived effort during stationary recumbent cycling. Read More

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September 2021

Identifying Factors Associated with Head Impact Kinematics and Brain Strain in High School American Football via Instrumented Mouthguards.

Ann Biomed Eng 2021 Sep 21. Epub 2021 Sep 21.

Department of Neurosurgery, Pediatric Neurosurgery, Stanford University, 300 Pasteur Dr Room R211, MC 5327, Stanford, CA, 94305, USA.

Repeated head impact exposure and concussions are common in American football. Identifying the factors associated with high magnitude impacts aids in informing sport policy changes, improvements to protective equipment, and better understanding of the brain's response to mechanical loading. Recently, the Stanford Instrumented Mouthguard (MiG2. Read More

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September 2021

Testing a Quaternion Conversion Method to Determine Human 3D Tibiofemoral Angles During an in Vitro Simulated Jump Landing.

J Biomech Eng 2021 Sep 22. Epub 2021 Sep 22.

University of Michigan-Dearborn, Department of Mechanical Engineering, 4901 Evergreen Road, Dearborn, MI 48128.

Lower limb joint kinematics have been measured in laboratory settings using fixed camera-based motion capture systems; however, recently inertial measurement units (IMUs) have been developed as an alternative. The purpose of this study was to test a quaternion conversion (QC) method for calculating the three orthogonal knee angles during the high velocities associated with a jump landing using commercially available IMUs. Nine cadaveric knee specimens were instrumented with APDM Opal IMUs to measure knee kinematics in one-legged 3-4x bodyweight simulated jump landings, four of which were used in establishing the parameters (training) for the new method and five for validation (testing). Read More

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September 2021

APOC3 genetic variation, serum triglycerides, and risk of coronary artery disease in Asian Indians, Europeans, and other ethnic groups.

Lipids Health Dis 2021 Sep 21;20(1):113. Epub 2021 Sep 21.

Duke-NUS Medical School, Singapore, 169857, Singapore.

Background: Hypertriglyceridemia has emerged as a critical coronary artery disease (CAD) risk factor. Rare loss-of-function (LoF) variants in apolipoprotein C-III have been reported to reduce triglycerides (TG) and are cardioprotective in American Indians and Europeans. However, there is a lack of data in other Europeans and non-Europeans. Read More

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September 2021

Effect of power-assistance on upper limb biomechanical and physiological variables during a 6-minute, manual wheelchair propulsion test: a randomised, cross-over study.

Disabil Rehabil 2021 Sep 21:1-5. Epub 2021 Sep 21.

CHU Raymond Poincaré APHP, Garches, France.

Purpose: Use of a power-assistance wheelchair could reduce the risk of musculoskeletal disorders (MSDs), however, a comprehensive biomechanical evaluation of these systems has not been carried out. This study aimed to evaluate and compare biomechanical UL propulsion variables, and physiological exercise-related variables during the use of a wheelchair with rear drive power assist device (RD-PAD) and a standard manual wheelchair (MW).

Materials And Methods: Twenty-two adults with spinal cord injury were recruited. Read More

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September 2021

Intraoperative Cone Beam CT in Hybrid Operation Room for Pediatric Scoliosis Patients: Comparison of Pedicle Screw Violation Rate at Normal and Low Radiation Doses.

Spine (Phila Pa 1976) 2021 Sep 20. Epub 2021 Sep 20.

Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, Japan Department of Radiology, Shinshu University Hospital, 3-1-1 Asahi, Matsumoto, Nagano, Japan; Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano, Japan.

Study Design: Retrospective observational study.

Objective: This study aimed to determine the effect of reducing the radiation dose of intraoperative cone beam computed tomography (CBCT) during posterior spinal fusion (PSF) for pediatric scoliosis on the rate of pedicle screw (PS) violation.

Summary Of Background Data: Intraoperative CBCT for pediatric scoliosis improves the accuracy of PS insertion in PSF. Read More

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September 2021

Prediction of long-term postoperative results of disc wedge and vertebral tilt with intraoperative prone radiograph in posterior correction of thoracolumbar/lumbar curve in adolescent idiopathic scoliosis: a minimum 5-year follow-up.

Spine J 2021 Sep 16. Epub 2021 Sep 16.

Department of Orthopedic Surgery, Dongguk University Ilsan Hospital, Goyangsi, Republic of Korea. Electronic address:

Background Context: Preservation of the more mobile lumbar segments is important during thoracolumbar/lumbar scoliosis surgery; however, the remaining disc wedge angle (DWA) below lowermost instrumented vertebra (LIV) and vertebral body tilt below LIV (LIV+1 tilt) can cause curve progression.

Purpose: This study aimed to evaluate the efficacy of intraoperative radiograph to predict the postoperative DWA below LIV and LIV+1 tilt on standing radiographs in patients with LIV of L3 or L4.

Study Design/setting: Retrospective cohort study PATIENT SAMPLE: A total of 235 patients with idiopathic scoliosis who underwent posterior correction and fusion for the structural thoracolumbar curve and were followed up for >5 years were reviewed. Read More

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September 2021

In-line measurement of exhaust mercury emissions by an instrumented light-duty vehicle using both on-road and test track experiments.

Sci Total Environ 2021 Sep 11;805:150265. Epub 2021 Sep 11.

Environmental Planning, Safety and Eco-design (EASE-AME) Laboratory, Gustave Eiffel University, 77454 Marne-la-Vallée, France.

The initial purpose of this study has been to develop an instrumental platform for monitoring mercury (Hg) emissions from vehicle exhausts under actual traffic conditions. The platform was then mounted onto a fully-instrumented passenger car to identify emission proxies and factors governing the emissions of gaseous elemental Hg (GeM) and its complementary fraction (GdPM). Data obtained from the road were complemented by data acquired on a test track at either stabilized speeds or well-characterized speed variations. Read More

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September 2021

Real-time replication of three-dimensional and time-varying physiological loading cycles for bone and implant testing: A novel protocol demonstrated for the proximal human femur while walking.

J Mech Behav Biomed Mater 2021 Sep 4;124:104817. Epub 2021 Sep 4.

Medical Device Research Institute, College of Science and Engineering, Flinders University, Tonsley, SA, Australia.

In vitro real-time replication of three-dimensional, time-varying load profiles acting on human bones during physical activity can advance bone and implant testing protocols. This study aimed to develop a novel protocol for applying the three-dimensional, time-varying hip contact force while walking to a human femur specimen. The target force profile was obtained from the literature. Read More

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September 2021

Effect of a novel laser-initiated photoacoustic activation of a solvent or sodium hypochlorite in the removal of filling remnants after retreatment of curved root canals.

Photodiagnosis Photodyn Ther 2021 Sep 15:102535. Epub 2021 Sep 15.

Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Croatia.

Background: This study aimed to evaluate the effect of Er:YAG laser-initiated shockwave-enhanced emission of photoacoustic streaming (SWEEPS®) and passive ultrasonic irrigation (PUI) combining thymol-based solvent or sodium hypochlorite (NaOCl) in the removal of filling remnants from curved canals.

Methods: Forty-eight curved root canals were instrumented and filled with an epoxy-resin-based sealer and gutta-percha. The canals were retreated with a Wave One Gold primary file (tip size 25; variable taper) and sodium hypochlorite (NaOCl). Read More

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September 2021

Surgical site infections in early onset scoliosis: what are long-term outcomes in patients with traditional growing rods?

Spine Deform 2021 Sep 18. Epub 2021 Sep 18.

Division of Pediatric Orthopaedic Surgery, Rainbow Babies and Children's Hospital, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine, 11100 Euclid Avenue, Cleveland, OH, 44106, USA.

Purpose: Deep surgical site infections (SSIs) are a common and potentially severe complication in early onset scoliosis (EOS) patients. We sought to identify the long-term outcomes following SSI, specific risk factors associated with recurrent infections, and if instrument retention is a prudent SSI management strategy in EOS.

Methods: We performed a retrospective review of all EOS patients who underwent traditional growing rod spine procedures from 2003 to 2017. Read More

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September 2021

Instrumented 5-Time Sit-To-Stand Test: Parameters Predicting Serious Falls beyond the Duration of the Test.

Gerontology 2021 Sep 15:1-14. Epub 2021 Sep 15.

Laboratory of Movement Analysis and Measurement (LMAM), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.

Background: Falls are a major cause of injuries in older adults. To evaluate the risk of falls in older adults, clinical assessments such as the 5-time sit-to-stand (5xSTS) test can be performed. The development of inertial measurement units (IMUs) has provided the possibility of a more in-depth analysis of the movements' biomechanical characteristics during this test. Read More

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September 2021

Dome Laminotomies at Adjacent Segments in Cervical Laminoplasty.

Int J Spine Surg 2021 Sep 17. Epub 2021 Sep 17.

Department of Neurosurgery, Mount Sinai Health System, New York, New York.

Background: Cervical laminoplasty is an established and effective surgical treatment for neurologic dysfunction associated with cervical myelopathy. "Dome laminotomies" involve undercutting the laminae adjacent to the laminoplasty levels to decompress and prevent spinal cord kinking on the lamina edges. The technique allows for a decrease in the number of instrumented laminae, smaller surgical exposure, and preservation of muscular attachments at the top of C2 and C7. Read More

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September 2021

Do Preoperative Nasal Antiseptic Swabs Reduce the Rate of Surgical Site Infections After Adult Thoracolumbar Spine Surgery?

J Am Acad Orthop Surg Glob Res Rev 2021 09 17;5(9). Epub 2021 Sep 17.

From the Twin Cities Spine Center, Minneapolis, MN.

Introduction: Surgical site infection (SSI) remains a major complication after adult spinal surgery. We investigated whether adding preoperative nasal decontamination by antiseptic swab (skin and nasal antiseptic povidone-iodine, SNA-PI) to our antimicrobial protocol reduces the SSI rate among our patients undergoing thoracolumbar spinal surgery.

Methods: We retrospectively reviewed all adult thoracolumbar spinal surgeries performed between June 2015 and May 2017 at a single hospital. Read More

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September 2021

Long-term outcome after surgical treatment of Scheuermann's Kyphosis (SK).

Spine Deform 2021 Sep 17. Epub 2021 Sep 17.

Park Hospital, Nottingham, UK.

Study Design: A retrospective observational cohort study with a minimum follow-up of 10 years of patients who underwent surgery for Scheurmann Kyphosis (SK).

Objective: Evaluate the long-term clinical and radiological outcome of patients with SK who either underwent combined anterior-posterior surgery or posterior instrumented fusion alone. There is paucity of literature for long-term outcome studies on SK. Read More

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September 2021

Selecting proper distal fusion level in severe thoracolumbar kyphosis secondary to late osteoporotic vertebral compression fracture to limit distal complications.

J Orthop Sci 2021 Sep 13. Epub 2021 Sep 13.

Department of Orthopaedic Surgery, Capital Medical University Xuanwu Hospital, Beijing, China; National Clinical Research Center for Geriatric Diseases, Beijing, China. Electronic address:

Background: Surgical treatment of severe thoracolumbar kyphosis (TLK) secondary to late osteoporotic vertebral compression fracture (OVCF) presents several challenges to spine surgeons. Proper selection of distal fusion level is an important issue in surgical planning to decrease the likelihood of distal mechanical complications. This study was designed to compare the clinical and radiographic outcomes in elderly patients suffering from severe TLK related with late OVCF between different distal fusion strategies and to recommend a superior distal fusion level for these patients. Read More

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September 2021

Effects of acoustically paced cadence modulation on impact forces in running.

Gait Posture 2021 Sep 9;90:234-238. Epub 2021 Sep 9.

Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, van der Boechorststraat 7-9, 1081 BT Amsterdam, the Netherlands. Electronic address:

Background: Increasing cadence in running has been advocated as a means to improve performance and reduce impact forces. Although acoustic pacing can be used for this purpose, it might by itself lead to an increased impact force, which would counteract the decrease in impact force that is being pursued by increasing the cadence with acoustic pacing and thus have a counterproductive effect.

Research Question: What are the effects of acoustic pacing and cadence on peak impact force and loading rate during running?

Methods: Unpublished data from a previous study, in which 16 participants ran on an instrumented treadmill with various forms of acoustic pacing, were analyzed to address the research question. Read More

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September 2021

The effects of cholesterol accumulation on Achilles tendon biomechanics: A cross-sectional study.

PLoS One 2021 16;16(9):e0257269. Epub 2021 Sep 16.

Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.

Familial hypercholesterolemia, a common genetic metabolic disorder characterized by high cholesterol levels, is involved in the development of atherosclerosis and other preventable diseases. Familial hypercholesterolemia can also cause tendinous abnormalities, such as thickening and xanthoma (tendon lipid accumulation) in the Achilles, which may impede tendon biomechanics. The objective of this study was to investigate the effect of cholesterol accumulation on the biomechanical performance of Achilles tendons, in vivo. Read More

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September 2021

Risk factors for the development of DJK in AIS patients undergoing posterior spinal instrumentation and fusion.

Spine Deform 2021 Sep 16. Epub 2021 Sep 16.

Department of Orthopaedic Surgery, Columbia Universityl, New York, NY, USA.

Purpose: Typically, selection of lowest instrumented vertebra (LIV) in Adolescent Idiopathic Scoliosis (AIS) is based on the coronal radiograph; however, increasing evidence suggests that fusions proximal to the stable sagittal vertebrae (SSV) on the lateral radiograph can result in distal junctional kyphosis (DJK). The purpose of this study is to compare rates of DJK in patients with AIS that have a discordance between the Lowest Touched Vertebra (LTV) and the SSV and to identify risk factors for developing DJK.

Methods: Patients with AIS Lenke type 1, 2 and 3 curves treated with a posterior spinal fusion were separated into two groups. Read More

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September 2021

Negligible Systemic Uptake of Suprafascial Vancomycin Powder Following Instrumented Posterior Spinal Fusion-Preliminary Results From A Randomized Clinical Trial (VANCO Trial).

Neurosurgery 2021 Sep 15. Epub 2021 Sep 15.

Department of Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.

Background: Intrawound vancomycin powder is an emerging strategy to reduce surgical site infections (SSIs) in spine surgery. However, there are concerns relating to its safety profile and toxicity. Data on systemic uptake of suprafascially administered vancomycin powder following instrumented spinal fusion is lacking. Read More

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September 2021

Positive impact of short-term gait rehabilitation in Parkinson patients: a combined approach based on statistics and machine learning.

Math Biosci Eng 2021 08;18(5):6995-7009

Department of Bioengineering, Institute of Care and Scientific Research ICS Maugeri, Telese Terme, Campania, Italy.

Parkinson's disease is the second most common neurodegenerative disorder in the world. Assumed that gait dysfunctions represent a major motor symptom for the pathology, gait analysis can provide clinicians quantitative information about the rehabilitation outcome of patients. In this scenario, wearable inertial systems for gait analysis can be a valid tool to assess the functional recovery of patients in an automatic and quantitative way, helping clinicians in decision making. Read More

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