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Arthur A De Smet - One of the best experts on this subject based on the ideXlab platform.

  • juvenile versus adult osteochondritis dissecans of the knee appropriate mr imaging criteria for instability
    Radiology, 2008
    Co-Authors: Richard Kijowski, Ben K Graf, Donna G Blankenbaker, Kazuhiko Shinki, Jason P Fine, Arthur A De Smet
    Abstract:

    Purpose: To retrospectively compare the sensitivity and specificity of previously described magnetic resonance (MR) imaging criteria for the detection of instability in patients with juvenile or adult osteochondritis dissecans (OCD) of the knee, with arthroscopic findings as the reference standard. Materials and Methods: Informed consent was waived by the Institutional Review Board for this HIPAA-compliant study. The study group consisted of 32 skeletally immature patients (25 boys, seven girls; mean age, 14.4 years) with 36 juvenile OCD lesions of the knee and 33 skeletally mature patients (25 men, eight women; mean age, 26.2 years) with 34 adult OCD lesions of the knee. All patients had been evaluated with MR imaging and arthroscopy. MR studies were retrospectively reviewed by two radiologists in consensus to determine the presence of previously described MR imaging criteria for OCD instability (ie, high T2 signal intensity rim, surrounding cysts, high T2 signal intensity Cartilage Fracture line, and fl...

  • untreated osteochondritis dissecans of the femoral condyles prediction of patient outcome using radiographic and mr findings
    Skeletal Radiology, 1997
    Co-Authors: Arthur A De Smet, Omer A Ilahi, Ben K Graf
    Abstract:

    Objective. We investigated the usefulness of plain film and MR findings in predicting the outcome of conservatively treated patients with femoral osteochondritis dissecans. Design. Without knowledge of the clinical outcome, we retrospectively reviewed the initial plain films and MR examinations. Each MR examination was evaluated for the four MR findings of instability. Patients. Fourteen patients were studied in whom osteochondritis dissecans of a femoral condyle had been treated conservatively for periods ranging from 1.2 to 8.5 years. Results and conclusion. Three of five patients with an open femoral growth plate and one of nine patients with a closed growth plate had a good clinical outcome. Both patients with lesions smaller than 160 mm2 in area had a good outcome and ten of 12 patients with larger lesions had a poor outcome. Both patients with stable lesions by MR imaging had a good outcome while ten of 12 patients with a lesion unstable by MR imaging had poor outcomes. All six patients with a Cartilage Fracture or articular defect had poor outcomes. The results of this study should be considered preliminary since only 14 patients were followed. However, it appears that a good clinical outcome is likely when the femoral growth plate is open, when the osteochondritis dissecans is small, and when the lesion is stable by MR imaging. When a Cartilage Fracture or articular defect is found on MR imaging, the patient is likely to have a poor outcome.

  • untreated osteochondritis dissecans of the femoral condyles prediction of patient outcome using radiographic and mr findings
    Skeletal Radiology, 1997
    Co-Authors: Arthur A De Smet, Omer A Ilahi, Ben K Graf
    Abstract:

    Objective. We investigated the usefulness of plain film and MR findings in predicting the outcome of conservatively treated patients with femoral osteochondritis dissecans. Design. Without knowledge of the clinical outcome, we retrospectively reviewed the initial plain films and MR examinations. Each MR examination was evaluated for the four MR findings of instability. Patients. Fourteen patients were studied in whom osteochondritis dissecans of a femoral condyle had been treated conservatively for periods ranging from 1.2 to 8.5 years. Results and conclusion. Three of five patients with an open femoral growth plate and one of nine patients with a closed growth plate had a good clinical outcome. Both patients with lesions smaller than 160 mm2 in area had a good outcome and ten of 12 patients with larger lesions had a poor outcome. Both patients with stable lesions by MR imaging had a good outcome while ten of 12 patients with a lesion unstable by MR imaging had poor outcomes. All six patients with a Cartilage Fracture or articular defect had poor outcomes. The results of this study should be considered preliminary since only 14 patients were followed. However, it appears that a good clinical outcome is likely when the femoral growth plate is open, when the osteochondritis dissecans is small, and when the lesion is stable by MR imaging. When a Cartilage Fracture or articular defect is found on MR imaging, the patient is likely to have a poor outcome.

Eric F. Pinczower - One of the best experts on this subject based on the ideXlab platform.

  • Thyroid Cartilage Fracture Repair in Rabbits: Comparing Healing With Wire and Miniplate Fixation
    The Laryngoscope, 1999
    Co-Authors: Todd G. Dray, Marc D. Coltrera, Eric F. Pinczower
    Abstract:

    Objectives: Evaluate cartilaginous healing in rabbits in response to surgically created thyroid Cartilage Fractures. Compare healing between laryngeal Fracture repair techniques. Study Design: Animal model. Materials and Methods: Laryngectomy specimens were analyzed at 10 weeks, following paired wire fixation (n = 7) and miniplate fixation (n = 7) of thyroid Cartilage Fractures. Results: Cartilaginous unions were present in all seven of the miniplated repairs, while fibrous unions were present in six of the wired repairs. The measure of distraction at the Fracture site was significantly greater in the wired repairs compared with the plated repairs (P = .005). Furthermore, in five of seven miniplated repairs no distraction at the healed Fracture site was present. Conclusions: The results demonstrate the ease, tolerability, and superiority of the miniplate fixation technique for the thyroid Cartilage Fractures, based on a rabbit model.

Ben K Graf - One of the best experts on this subject based on the ideXlab platform.

  • juvenile versus adult osteochondritis dissecans of the knee appropriate mr imaging criteria for instability
    Radiology, 2008
    Co-Authors: Richard Kijowski, Ben K Graf, Donna G Blankenbaker, Kazuhiko Shinki, Jason P Fine, Arthur A De Smet
    Abstract:

    Purpose: To retrospectively compare the sensitivity and specificity of previously described magnetic resonance (MR) imaging criteria for the detection of instability in patients with juvenile or adult osteochondritis dissecans (OCD) of the knee, with arthroscopic findings as the reference standard. Materials and Methods: Informed consent was waived by the Institutional Review Board for this HIPAA-compliant study. The study group consisted of 32 skeletally immature patients (25 boys, seven girls; mean age, 14.4 years) with 36 juvenile OCD lesions of the knee and 33 skeletally mature patients (25 men, eight women; mean age, 26.2 years) with 34 adult OCD lesions of the knee. All patients had been evaluated with MR imaging and arthroscopy. MR studies were retrospectively reviewed by two radiologists in consensus to determine the presence of previously described MR imaging criteria for OCD instability (ie, high T2 signal intensity rim, surrounding cysts, high T2 signal intensity Cartilage Fracture line, and fl...

  • untreated osteochondritis dissecans of the femoral condyles prediction of patient outcome using radiographic and mr findings
    Skeletal Radiology, 1997
    Co-Authors: Arthur A De Smet, Omer A Ilahi, Ben K Graf
    Abstract:

    Objective. We investigated the usefulness of plain film and MR findings in predicting the outcome of conservatively treated patients with femoral osteochondritis dissecans. Design. Without knowledge of the clinical outcome, we retrospectively reviewed the initial plain films and MR examinations. Each MR examination was evaluated for the four MR findings of instability. Patients. Fourteen patients were studied in whom osteochondritis dissecans of a femoral condyle had been treated conservatively for periods ranging from 1.2 to 8.5 years. Results and conclusion. Three of five patients with an open femoral growth plate and one of nine patients with a closed growth plate had a good clinical outcome. Both patients with lesions smaller than 160 mm2 in area had a good outcome and ten of 12 patients with larger lesions had a poor outcome. Both patients with stable lesions by MR imaging had a good outcome while ten of 12 patients with a lesion unstable by MR imaging had poor outcomes. All six patients with a Cartilage Fracture or articular defect had poor outcomes. The results of this study should be considered preliminary since only 14 patients were followed. However, it appears that a good clinical outcome is likely when the femoral growth plate is open, when the osteochondritis dissecans is small, and when the lesion is stable by MR imaging. When a Cartilage Fracture or articular defect is found on MR imaging, the patient is likely to have a poor outcome.

  • untreated osteochondritis dissecans of the femoral condyles prediction of patient outcome using radiographic and mr findings
    Skeletal Radiology, 1997
    Co-Authors: Arthur A De Smet, Omer A Ilahi, Ben K Graf
    Abstract:

    Objective. We investigated the usefulness of plain film and MR findings in predicting the outcome of conservatively treated patients with femoral osteochondritis dissecans. Design. Without knowledge of the clinical outcome, we retrospectively reviewed the initial plain films and MR examinations. Each MR examination was evaluated for the four MR findings of instability. Patients. Fourteen patients were studied in whom osteochondritis dissecans of a femoral condyle had been treated conservatively for periods ranging from 1.2 to 8.5 years. Results and conclusion. Three of five patients with an open femoral growth plate and one of nine patients with a closed growth plate had a good clinical outcome. Both patients with lesions smaller than 160 mm2 in area had a good outcome and ten of 12 patients with larger lesions had a poor outcome. Both patients with stable lesions by MR imaging had a good outcome while ten of 12 patients with a lesion unstable by MR imaging had poor outcomes. All six patients with a Cartilage Fracture or articular defect had poor outcomes. The results of this study should be considered preliminary since only 14 patients were followed. However, it appears that a good clinical outcome is likely when the femoral growth plate is open, when the osteochondritis dissecans is small, and when the lesion is stable by MR imaging. When a Cartilage Fracture or articular defect is found on MR imaging, the patient is likely to have a poor outcome.

Todd G. Dray - One of the best experts on this subject based on the ideXlab platform.

  • Thyroid Cartilage Fracture Repair in Rabbits: Comparing Healing With Wire and Miniplate Fixation
    The Laryngoscope, 1999
    Co-Authors: Todd G. Dray, Marc D. Coltrera, Eric F. Pinczower
    Abstract:

    Objectives: Evaluate cartilaginous healing in rabbits in response to surgically created thyroid Cartilage Fractures. Compare healing between laryngeal Fracture repair techniques. Study Design: Animal model. Materials and Methods: Laryngectomy specimens were analyzed at 10 weeks, following paired wire fixation (n = 7) and miniplate fixation (n = 7) of thyroid Cartilage Fractures. Results: Cartilaginous unions were present in all seven of the miniplated repairs, while fibrous unions were present in six of the wired repairs. The measure of distraction at the Fracture site was significantly greater in the wired repairs compared with the plated repairs (P = .005). Furthermore, in five of seven miniplated repairs no distraction at the healed Fracture site was present. Conclusions: The results demonstrate the ease, tolerability, and superiority of the miniplate fixation technique for the thyroid Cartilage Fractures, based on a rabbit model.

Annette H Ang - One of the best experts on this subject based on the ideXlab platform.

  • a pilot study of balloon dilation in an animal model resulting in cricoid Cartilage Fracture implications for the stenotic pediatric airway
    Laryngoscope, 2010
    Co-Authors: Annette H Ang, Vikash K Modi, Roheen Raithatha, Max M April, Robert F Ward
    Abstract:

    Objective: Endoscopic balloon dilation is increasingly popular as primary therapy for infants with subglottic stenosis. We aim to determine the maximum balloon diameter and pressure where no Fracture of the cricoid would occur, minimum balloon size and pressures where a gross Fracture of the cricoid occurs, and location of these Fractures. We tested these objectives by performing balloon dilation in laryngotracheal complexes of eight euthanized adult male New Zealand white rabbits, with airway characteristics similar to a 3- to 9-month-old infant. Methods: Subglottic airway diameter of each specimen was determined using endotracheal tubes (Cotton-Myer grading system). Preexistent subglottic disease was excluded by rigid endoscopy. Serial dilation with balloon catheters was performed, employing incremental balloon sizes and pressures, to determine balloon size and pressure, which resulted in a cricoid Fracture. Locations of gross Fractures were validated by two independent observers. Results: Airway diameter of all specimens was 5.4 mm (size 4.0 endotracheal tube). Four of the seven cricoid Cartilages exhibited gross Fractures. Dilation with balloon diameters less than 6.0 mm failed to induce a Fracture despite maximal inflation to 16.0 atmospheres. The minimum balloon size required to create a Fracture was 7.0 mm, at a pressure of 6.0 atmospheres. All Fractures occurred at the anterior lamina of cricoid ring. Conclusions: No Fractures occurred when balloon dilation was performed with a balloon 0.6 mm or smaller than the measured subglottic diameter. Fractures of the cricoid occurred when balloon dilation was performed with a balloon 1.6 mm or larger than the subglottic diameter. Laryngoscope, 2010