Abstract:
:External fixators commonly used in orthopaedic trauma and reconstruction may pose a potential safety hazard to patients exposed to magnetic resonance imaging. This interaction with the scanner depends on fixator composition, magnetism, and geometry. Image artifact produced by devices during scanning may diminish the diagnostic quality of the image. A mail survey of 91 radiologists' and 167 radiological technologists' current practices identified an absence of consensus regarding protocols for scanning patients who had external fixators in place. Eighteen external fixators were tested. Force was measured during exposure to the magnetic field at 30 cm from the magnetic resonance imaging portal, at the portal, and 30 cm inside the portal. The recordings ranged from 0 to 2.2 kg. Three fixators did not generate measurable forces and therefore are considered safe for the magnetic resonance imaging based on previously published safety standards. Ten devices did not produce measurable forces until placed at the portal, indicating that these fixators may be considered safe, providing the scanned area is distant to the fixator. To investigate image artifact, the fixators were placed on a phantom model and scanned. There was substantial variation among the fixators and image quality produced, depending on fixator composition and geometry.
journal_name
Clin Orthop Relat Resjournal_title
Clinical orthopaedics and related researchauthors
Cannada LK,Herzenberg JE,Hughes PM,Belkoff Ssubject
Has Abstractpub_date
1995-08-01 00:00:00pages
206-14issue
317eissn
0009-921Xissn
1528-1132pub_type
杂志文章abstract:BACKGROUND:Sacrectomy may offer curative potential for primary sarcomas of the sacrum. However, it is unclear whether and to what extent sacrectomies achieve local control. QUESTIONS/PURPOSE:We therefore determined the curative potential, walking ability, continence control, and quality of life for children after sacr...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1007/s11999-011-2199-x
更新日期:2012-05-01 00:00:00
abstract::A ball-and-socket joint is an unusual disturbance of normal ankle development. Previous reports have noted good function and the absence of osteoarthritic change in ankles with this configuration. A 50-year-old man with no history of injury developed an osteoarthritic ball-and-socket deformity of the ankle joint. Asso...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1987-02-01 00:00:00
abstract::Mini-incision total knee arthroplasty can be accomplished through versions of exposures used in standard total knee arthroplasty. Modifications of the medial parapatellar, subvastus, and midvastus approaches are presented, and potential advantages and disadvantages of each approach are reviewed. When making the transi...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章,评审
doi:10.1097/01.blo.0000148574.79874.d0
更新日期:2004-11-01 00:00:00
abstract::Modular components allow for the customization of hip replacements to the individual patient. Modular head-neck components allow for mixed material systems to minimize polyethylene wear as well as provide the ability to vary neck length and head size independent of the stem. Modular interfaces, however, result in an i...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1994-01-01 00:00:00
abstract::An in vivo canine model was developed to investigate the histologic and biochemical parameters associated with aseptic loosening. Thirty-eight canines had cementless total hip arthroplasty. Experimental groups were designed specifically to investigate the relative contributions of implant motion and particulate debris...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1995-10-01 00:00:00
abstract::Varus deformity is a common finding in candidates for total knee arthroplasty (TKA), but very little has been written concerning the problems encountered in correcting these deformities at the time of arthroplasty. Compared to patients without deformities, this group of patients require more attention to the technical...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1991-12-01 00:00:00
abstract::Quality of life measures have neglected to include a critical self-assessment component in pediatric sarcoma patients. Our report shows how children rate their own quality of life and how that varies over time after surgery. Using the Pediatric Outcomes Data Collection Instrument, quality of life data was prospectivel...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1097/BLO.0b013e31804f545d
更新日期:2007-06-01 00:00:00
abstract:BACKGROUND:Although patient-reported outcome measures (PROMs) are helpful to define whether an intervention has improved a patient's status in ways the patient feels are important, they may also serve an empowering educational role; specifically, sharing a patient's scores might help the patient understand his or her p...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1007/s11999.0000000000000069
更新日期:2018-04-01 00:00:00
abstract::This Classic Article is a reprint of the original work by T. W. Huntington, Case of bone transference. Use of a segment of fibula to supply a defect in the tibia. An accompanying biographical sketch of T. W. Huntington is available at DOI 10.1007/s11999-012-2495-0 . The classic article is 1905 and is reprinted courtes...
journal_title:Clinical orthopaedics and related research
pub_type: 传,古典文章,历史文章,杂志文章
doi:10.1007/s11999-012-2496-z
更新日期:2012-10-01 00:00:00
abstract::Fifty consecutive patients treated with chymopapain injection for a clinical and radiographic diagnosis of herniated nucleus pulposus were evaluated prospectively. All patients had a prechymopapain computed tomography (CT) scan and a three-month postinjection CT scan. In addition, ten patients (20%) had a six-month po...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1987-06-01 00:00:00
abstract::This current study describes how human genetic approaches are used to identify and understand the roles of genes and their protein products, during skeletal development, growth, and homeostasis. Searches for the genes responsible for brachydactyly, symphalangism, spondyloepiphyseal dysplasia, and camptodactyly-arthrop...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章,评审
doi:10.1097/00003086-200010001-00006
更新日期:2000-10-01 00:00:00
abstract::Twenty-nine children were treated for bicycle spoke injury, which occurred while they were sitting behind their riding parents. Their feet were caught in between the bicycle spoke and the frame rod. Five of these children suffered supramalleolar fracture. These fractures had a similar radiographic pattern, namely a gr...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1979-10-01 00:00:00
abstract::In a 37-year-old man, bilateral infraspinatus muscle weakness was associated with compression of the suprascapular nerve. The compression occurred at the spinoscapular angle by bilateral development of ganglia. The lesion was confirmed by electromyography. Surgical approaches to the area are described along with a rev...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1982-06-01 00:00:00
abstract::Decisions made regarding resumption of driving after total hip arthroplasty may be determined by a combination of factors including driving reaction time and when postsurgical precautions need no longer be adhered to. Ninety patients, ranging in age from 34 to 85 years old were recruited after total hip arthroplasty t...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1097/01.blo.0000072468.32680.ff
更新日期:2003-08-01 00:00:00
abstract::The treatment of hip disorders in adolescents and young adults has evolved rapidly during the past decade because of enhanced understanding of prearthritic and early arthritic hip disease combined with improved diagnostic skills, better patient selection criteria, and refinements in alternative surgical procedures. De...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章,评审
doi:10.1097/01.blo.0000193511.91643.2a
更新日期:2005-12-01 00:00:00
abstract::Dislocation is a well documented complication after a two-stage revision arthroplasty for a deep periprosthetic hip infection. We are aware of no reports specifically evaluating the risk factors for dislocation after reimplantation for infection. We hypothesized greater age, increase in the number of operations on the...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1097/01.blo.0000218747.92118.3a
更新日期:2006-06-01 00:00:00
abstract:UNLABELLED:Warfarin dosing algorithms do not account for genetic mutations that can affect anticoagulation response. We retrospectively assessed to what extent the VKORC1 variant genotype would alter the likelihood of being a hyperresponder or hyporesponder to warfarin in patients undergoing total joint arthroplasty. W...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1007/s11999-008-0641-5
更新日期:2009-07-01 00:00:00
abstract::Chondrocytes are the single cellular component of hyaline cartilage. Under physiologic conditions, they show steady-state equilibrium between anabolic and catabolic activities that maintains the structural and functional integrity of the cartilage extracellular matrix. Implicit in the loss of cartilage matrix that is ...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章,评审
doi:10.1097/01.blo.0000144854.66565.8f
更新日期:2004-10-01 00:00:00
abstract::Elastofibroma dorsi is a benign soft tissue tumor, not well-known because of its low incidence, located in the chest wall in the subscapular area. In 10 patients with elastofibroma dorsi, the clinical symptoms were snapping scapula or shoulder pain. In three of the patients, the previous diagnosis was shoulder impinge...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1097/00003086-200107000-00027
更新日期:2001-07-01 00:00:00
abstract::For a mean period of 7.8 years, the morphology of knee deformity and its annual changes in 8 patients (16 knees; mean age at the initial examination, 8.4 years) with multiple hereditary exostoses were evaluated radiographically. Knee deformity developed during the growth spurt period. Genu valgum with a femorotibial a...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1995-04-01 00:00:00
abstract:BACKGROUND:Polyethylene wear debris is a major contributor to inflammation and the development of implant loosening, a leading cause of THA revisions. To reduce wear debris, highly crosslinked ultrahigh-molecular-weight polyethylene (UHMWPE) was introduced to improve wear properties of bearing surfaces. As highly cross...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1007/s11999-010-1713-x
更新日期:2011-08-01 00:00:00
abstract::People are the major source of bacterial contamination in the hospital environment, and to control environmental bacteria, the shedding potential of people must be controlled. In a conventional operating room, the more complete the surgical attire worn by everyone in the room, the better the control; i.e., body exhaus...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1984-11-01 00:00:00
abstract:BACKGROUND:Studies suggest, even when controlling for disease severity, socioeconomic status, education, and access to care, racial and ethnic minorities receive lower-quality health care and have worse perceived pain and function before and after total joint arthroplasty. QUESTION/PURPOSES:We evaluated the influence ...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1007/s11999-011-1841-y
更新日期:2011-07-01 00:00:00
abstract::Dislocation after hip replacement occurs at an overall incidence of 2% to 3% and has significant cost and morbidity implications. Statistically increased incidence is observed in females and in the elderly, and after reoperation procedures. Specific causes include cup malrotation, trochanteric migration, and decreased...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1997-11-01 00:00:00
abstract::Severe involvement of the wrist in rheumatoid arthritis poses great functional restrictions in eating, maintaining personal hygiene, and in performing general daily activities. Twenty-six Swanson radiocarpal implant arthroplasties were performed in 23 patients. Patients' average age was 57 years, with a preoperative d...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1982-06-01 00:00:00
abstract::Subtalar dislocations are uncommon injuries. In an effort to obtain accurate information, eight recent major series (more than five patients) were summarized, including the experience at the authors' institution between 1975 and 1985 (12 patients). Medial dislocations predominated (79.5%), lateral injuries accounted f...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1989-01-01 00:00:00
abstract::A xanthoma, located in the ulna, not accompanied by the traditional cutaneous and tendinous manifestations (xanthoma and xanthelasma) and with a late onset of alterations in lipid values, was diagnosed in a 56-year-old man. The lesion had a slow but constant growth leading to internal calcifications. Hyperlipidemia Ty...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1097/01.blo.0000063790.32430.10
更新日期:2003-05-01 00:00:00
abstract:BACKGROUND:Minimally invasive surgery (MIS) approaches have the potential to reduce procedure-related morbidity when compared with traditional approaches. However, the magnitude of radiographic correction and degree of clinical improvement with MIS techniques for adult spinal deformity remain undefined. QUESTION/PURPO...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章,评审
doi:10.1007/s11999-013-3441-5
更新日期:2014-06-01 00:00:00
abstract::Augmented reality is a display technique that combines supplemental information with the real world environment. Augmented reality systems are on the verge of being used everyday in medical training, preoperative planning, preoperative and intraoperative data visualization, and intraoperative tool guidance. The basic ...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:10.1097/00003086-199809000-00014
更新日期:1998-09-01 00:00:00
abstract::Sixteen human trabecular bone biopsies were obtained from sites located in the ilium and in the area of the greater trochanter of the femur. Patients ranged from 19 to 85 years old and included men and women. All bone surfaces observed contained osteoid. Flat, branched fibroblastic-like cells were observed lining bone...
journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章
doi:
更新日期:1978-07-01 00:00:00