Biomedical subjects

Brett D Owens

Publications and source records attributed to Brett D Owens.

6 recordsLinked to original sources

PubMed2003

Hip arthroscopy: surgical approach, positioning, and distraction.

The hip is the most deeply recessed joint in the body making it difficult to access arthroscopically. However, for the patient with a symptomatic loose body or labral tear open techniques are less advantageous. It is for this reason that, however difficult, minimally-invasive approaches to the hip have been developed. Meticulous attention to proper positioning and portal placement is paramount for safe and successful arthroscopy of the hip. The current authors will review the seminal features of positioning and minimally-invasive surgical approaches to the hip.

Arthroscopy↗

PubMed2003

Treatment of type III tibial intercondylar eminence fractures in skeletally immature athletes.

Our retrospective study of 12 skeletally immature athletes with type III intercondylar eminence fractures showed that arthroscopic evaluation with mini-open arthrotomy and repair of the tibial intercondylar eminence fracture with absorbable suture can be successful in repairing anterior cruciate ligament avulsion fractures and in helping such patients return to their athletic endeavors.

Arthroscopy↗

PubMed2003

Radiofrequency energy: applications and basic science.

Interest in using radiofrequency energy devices in orthopedics has been growing recently. The basic science of this intervention is similar to that of laser energy application and involves the heating of tissue. Collagen responds characteristically to heat--it becomes denatured, and its configuration becomes disorganized. Thus, this application of heat can be used to shorten collagenous soft tissue. Radiofrequency energy can also be used at higher parameters for tissue ablation. Although early clinical trials have shown promising results for many applications, long-term study is needed.

Catheter Ablation↗

PubMed2003

Intramedullary transmetatarsal Kirschner wire fixation of Lisfranc fracture-dislocations.

Lisfranc joint injuries are frequently the result of high-energy accidents. The usual method of treatment is open reduction and internal fixation or closed reduction with percutaneous pinning. In cases in which soft tissue injury may compromise open reduction and internal fixation or traditional pinning techniques, transmetatarsal Kirschner wire fixation may be performed, allowing the placement of temporary hardware away from the site of soft tissue injury. The following report details this technique as it has been used in 3 patients.

Adult↗

PubMed2002

Hemimetameric segmental shift: a case series and review.

STUDY DESIGN: A case series of patients with hemimetameric shift. OBJECTIVES: To describe the radiographic and physical findings as well as treatment provided to a subset of patients with congenital scoliosis. SUMMARY OF BACKGROUND DATA: Hemimetameric segmental displacement, or hemimetameric shift, is a clinical entity defined by two contralateral hemivertebrae separated by at least one normal vertebra. Although the entity is briefly described in textbooks, there are no published series to date. METHODS: From 1974 to 2000, 186 cases of congenital scoliosis were identified from two referral centers. Of these, 27 cases (15%) of hemimetameric shift were identified. Medical records and radiographs were reviewed, as well as magnetic resonance imaging when available. RESULTS: There were an average of 2.9 hemivertebrae per patient (range 2-6) with the following distribution: T1-T6 (29), T7-T11 (28), T12-L1 (10), L2-L4 (11), and L5 (1). The average curve magnitude at presentation was 28 degrees (range 9 degrees -55 degrees). Nine patients required surgery-most commonly with involvement of the thoracolumbar or lumbosacral junction. Eleven patients also had associated anomalies to include Klippel-Feil syndrome (3), Goldenhar syndrome (2), imperforate anus (2), tracheoesophageal fistula (2), and a single kidney (2). There was only one patient who had an abnormal magnetic resonance imaging (1 out of 17; 6%). CONCLUSIONS: Hemimetameric shift is a common finding in congenital scoliosis. Hemivertebrae are most commonly found in the thoracic spine; however, surgical intervention is most commonly observed when the caudal hemivertebrae is located from the thoracolumbar to lumbosacral junction. The incidence of abnormal magnetic resonance imaging findings is low (6%).

Adolescent↗

PubMed2002

Prospective analysis of radiofrequency versus mechanical debridement of isolated patellar chondral lesions.

PURPOSE: Debridment is used to treat Outerbridge grades 2 and 3 lesions in a mechanically aligned and properly tracking patella. It removes fibrillation and provides a stable rim of chondral tissue. Recent basic science reports suggest that radiofrequency probes are superior to mechanical shavers for articular cartilage debridement. The goal of this study was to compare the clinical outcomes of debridement of patellar grade 2 and 3 chondral lesions using radiofrequency and mechanical devices. TYPE OF STUDY: Patients were prospectively randomized into 2 treatment groups. METHODS: Consecutive female patients undergoing arthroscopy for symptomatic, isolated patellar cartilage lesions without evidence of instability, malalignment, or patellar tracking dysfunction were prospectively randomized into radiofrequency and mechanical debridement groups based on medical record number. All patients had failed a 6-month course of conservative treatment and had chondral pathology documented by magnetic resonance imaging. Patients were assessed before and after surgery using the Fulkerson-Shea Patellofemoral Joint Evaluation Score. RESULTS: Nineteen patients (mean age, 37.5 years) underwent chondral debridement using a mechanical shaver and 20 patients (mean age, 36.9 years) underwent chondral debridement using a bipolar radiofrequency probe at nonablative energy levels. The mechanical group had a mean preoperative score of 59.2 and the radiofrequency group had a mean preoperative score of 59.6. Postoperative scores at 12-month follow-up were 80.0 for the mechanical group and 87.9 for the radiofrequency group (P =.0031). At 24 months, the mean score of the mechanical group was 77.5 and the mean of the radiofrequency group was 86.6 (P =.0006). CONCLUSIONS: This study presents clear evidence of superior clinical outcome of debridement of patellar grade 2 and 3 chondral lesions with the use of bipolar radiofrequency versus a mechanical shaver.

Adult↗