Flexor tendon tears in the hand: use of MR imaging to diagnose degree of injury in a cadaver model.

Rubin, David A.; Kneeland, J. Bruce; Kitay, Garry S.; Naranja, R. John

doi:10.2214/ajr.166.3.8623637

Cited by 44 publications

(18 citation statements)

References 18 publications

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“…For this reason, we reformatted the data into the coronal plane. Reconstruction of MRI-acquired images into different planes has been widely used clinically (10)(11)(12). We found that similar tibial cartilage volumes are obtained from the original sagittal sequence and the reformatted coronal data.…”

Section: Discussionmentioning

confidence: 82%

Longitudinal study of changes in tibial and femoral cartilage in knee osteoarthritis

Cicuttini

Wluka

Wang

et al. 2004

Arthritis & Rheumatism

109

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Objective. Despite the increasing interest in knee cartilage volume as an outcome measure in studies of osteoarthritis (OA), it is unclear what components of knee cartilage will be most useful as markers of structural change in the tibiofemoral joint. This study was undertaken to longitudinally compare changes in femoral and tibial cartilage volume in patients with OA.Methods. One hundred seventeen patients with knee OA (58.1% women; mean ؎ SD age 63.7 ؎ 10.2 years) were examined. Femoral and tibial cartilage volumes (medial and lateral tibiofemoral joints) were determined from T1-weighted fat-saturated magnetic resonance images of the knee from coronal views.Results. The study population was followed up for a mean ؎ SD of 1.9 ؎ 0.2 years. In the medial tibiofemoral joint, the mean ؎ SD loss of cartilage was 0.15 ؎ 0.30 ml/year for femoral cartilage and 0.10 ؎ 0.25 ml/year for tibial cartilage. In the lateral tibiofemoral joint, the average loss was 0.15 ؎ 0.22 and 0.12 ؎ 0.16 ml/year for femoral and tibial cartilage, respectively. There was a significant correlation between the degree of loss of tibial cartilage and the degree of loss of femoral cartilage, in both tibiofemoral joints (r ‫؍‬ 0.81, P < 0.001 at the medial tibiofemoral joint; r ‫؍‬ 0.71, P < 0.001 at the lateral tibiofemoral joint).Conclusion. Longitudinal changes in tibial cartilage and those in femoral cartilage are strongly related to one another. This suggests that in tibiofemoral disease, measuring tibial cartilage alone may be adequate, given the facts that measurements of the total femoral cartilage are less reproducible and there are difficulties inherent in identifying the most appropriate component of femoral cartilage to measure.There has been increasing interest in the use of magnetic resonance imaging (MRI) in the measurement of knee cartilage volume as a possible outcome measure in arthritis (1-3). MRI has been shown to provide a valid quantification of cartilage volume as compared with findings of anatomic dissection. The method is reproducible, with coefficients of variation (CVs) of ϳ2% (2-4). This technique has been used to explore factors that influence knee cartilage in healthy adults and children (3,4).One problem is that with most techniques currently in use to measure knee cartilage volume, manual manipulation has to be performed to varying degrees, and the techniques are consequently quite timeconsuming and their use is limited to relatively few institutions (1-3). One potential approach is to attempt to limit the components of knee cartilage being measured and still retain cartilage measures that are a valid gauge of the state of joint cartilage. We have previously shown a strong correlation between femoral cartilage volume and tibial cartilage volume measured in both the medial and lateral tibiofemoral compartments of the knee in healthy subjects and those with osteoarthritis (OA) (5). Since measurements of the total femoral cartilage are less reproducible and there are difficulties in identifying the most appropriate com...

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Section: Discussionmentioning

confidence: 82%

Longitudinal study of changes in tibial and femoral cartilage in knee osteoarthritis

Cicuttini

Wluka

Wang

et al. 2004

Arthritis & Rheumatism

109

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show abstract

“…For this reason, we reformatted the data into the coronal plane. Reconstruction of MRI‐acquired images into different planes has been widely used clinically (10–12). We found that similar tibial cartilage volumes are obtained from the original sagittal sequence and the reformatted coronal data.…”

Section: Discussionmentioning

confidence: 99%

Preparation and characterization of monodisperse magnetic poly(styrene butyl acrylate methacrylic acid) microspheres in the presence of a polar solvent

Xie

Zhang

Luo

et al. 2003

J of Applied Polymer Sci

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Magnetic poly(styrene butyl acrylate methacrylic acid) [P(St-BA-MAA)] microspheres were prepared by emulsifier-free emulsion polymerization in the presence of a polar solvent and a ferrofluid prepared by a coprecipitation method. The effects of some polymerization parameters, such as the medium polarity, reaction temperature, initiator content, and surfactant content in the ferrofluid, on the particle diameter and particle size distribution of magnetic P(St-BA-MAA) microspheres were examined in detail. The results showed that the electrostatic repulsion in the polymerization system significantly affected the monodispersity of the resulting magnetic polymer microspheres. The proper electrostatic repulsion, achieved through changes in the medium polarity and amount of surfactant in the polymerization system, improved the monodispersity, but a higher or lower repulsion led to a decrease in the monodispersity. Although the existence of surfactant and magnetite particles reduced the monodispersity more or less, the polymerization behavior of an emulsifier-free emulsion polymerization in the presence of the ferrofluid was analogous to that of a conventional emulsifier-free emulsion polymerization.

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“…Although several investigators (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) have studied ultrasonography (US), computed tomography (CT), and magnetic resonance (MR) imaging in the evaluation of flexor tendon abnormalities, diagnosis of lesions of the pulley system has been made only indirectly with the detection of a gap between the flexor tendon and the bone on sagittal CT scans and MR images, a finding referred to as the bowstring sign. This sign usually reflects an extensive abnormality of the pulley system that leaves limited or partial lesions of the system virtually undetected by means of indirect methods of visualization.…”

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confidence: 99%

Pulley System in the Fingers: Normal Anatomy and Simulated Lesions in Cadavers at MR Imaging, CT, and US with and without Contrast Material Distention of the Tendon Sheath

Hauger¹,

Chung²,

Lektrakul³

et al. 2000

Radiology

152

149

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Flexor tendon tears in the hand: use of MR imaging to diagnose degree of injury in a cadaver model.

Abstract: OBJECTIVE

Cited by 44 publications

References 18 publications

Longitudinal study of changes in tibial and femoral cartilage in knee osteoarthritis

Longitudinal study of changes in tibial and femoral cartilage in knee osteoarthritis

Preparation and characterization of monodisperse magnetic poly(styrene butyl acrylate methacrylic acid) microspheres in the presence of a polar solvent

Pulley System in the Fingers: Normal Anatomy and Simulated Lesions in Cadavers at MR Imaging, CT, and US with and without Contrast Material Distention of the Tendon Sheath

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