Publications by authors named "Barron O"

Article Synopsis
  • The growth and function of kids' hands is complicated because they still have open growth plates and different ossification patterns.
  • This article looks at how kids’ hands normally develop, along with problems that can come up from injuries or being born with differences.
  • It uses special imaging techniques to study issues related to the fingers, thumbs, and bones in the hand, without focusing on cancer or arthritis.
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Background: Much has been written about the diagnosis and treatment of soft tissue mallet injuries. However, there has been little regarding the characteristics of this injury affecting patients' prognosis. The purpose of this prospective study was to identify factors influencing the outcome of treatment of soft tissue mallet injuries.

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Photobacterium damsela is a gram-negative bacterium that is known to cause infection, most commonly in marine animals and rarely in humans. Photobacterium damsela typically results in skin and soft tissue infections in humans and has been associated with necrotizing fasciitis in several case reports. After an initially benign presentation, P damsela necrotizing fasciitis often progresses rapidly to multiorgan failure and death.

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Scaphotrapeziotrapezoid (STT) arthritis occurs commonly with basal joint arthritis, but can also occur in isolation or in conjunction with other patterns of wrist arthritis, such as scapholunate advanced collapse. Surgical options depend on the specific clinical scenario encountered. Isolated STT arthritis was classically managed with arthrodesis, but is now often addressed with distal scaphoid resection (open or arthroscopic), trapeziectomy (partial or complete) and partial trapezoid resection, or implant arthroplasty.

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Groundwater responses to barometric pressure fluctuations are characterized using the concept of barometric efficiency (BE). For semiconfined and confined aquifers, BE values can be used to provide efficient, low-cost estimates of specific storage. This study compares, for the first time, eight existing methods of BE estimation.

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The purpose of this study was to prospectively document the incidence of variations in the course of palmar cutaneous branch of the median nerve (PCBMN) that may increase the risk of injury to the nerve during the flexor carpi radialis (FCR) approach. We hypothesize that the incidence of anomalous branching of the PCBMN around the FCR sheath will be approximately 5%. All cases that met inclusion criteria between November 2013 and March 2018 were included.

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Article Synopsis
  • The stiff digit can result from trauma or surgery, significantly impacting a person’s functionality and quality of life due to stiffness and contractures from various factors related to joint and tendon health.
  • Understanding the anatomy and relationships of finger structures is vital for effective physical exams and surgical planning.
  • Initial treatment usually involves nonsurgical methods like therapy and splinting, while surgery is considered for severe cases; treatment outcomes depend on the specific joint, severity of the contracture, and patient commitment to therapy.
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A cadaveric study was performed to evaluate the accuracy and reliability of radiographic estimation of the volar lip fragment size in proximal interphalangeal joint fracture-dislocations. Middle phalangeal base volar lip fractures of varying size and morphology were simulated in 18 digits. Radiographs and digital photographs of the middle phalangeal joint surface were obtained pre- and postinjury.

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Purpose: To correlate the physical examination finding of distal radial metaphyseal tenderness with plain radiographic and magnetic resonance imaging after acute wrist injury to diagnose occult distal radius fractures. We hypothesized that persistent distal radial metaphyseal tenderness 2 weeks after acute injuries is predictive of an occult fracture.

Methods: Twenty-nine adult patients presented, after acute trauma, with distal radial metaphyseal tenderness and initial plain radiographs and/or fluoroscopic images that did not show a distal radius fracture.

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Background: The purpose of this study is to evaluate the role of radiographic and clinical exams in predicting screw penetration into the proximal radioulnar joint and ulnohumeral joint during open reduction and internal fixation of the radial head and proximal ulna.

Methods: Olecranon and radial head plates were applied to 15 cadaveric elbows. Screws were assessed for intra-articular joint penetration using both clinical exam and radiographic evaluation.

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Proximal interphalangeal joint injuries are common and often can be treated nonsurgically. Some dorsal fracture-dislocations, however, require special attention or surgical management to optimize outcomes. Treatment options for dorsal proximal interphalangeal fracture-dislocations include splinting, percutaneous pinning, fracture fixation, external fixation devices, volar plate arthroplasty, and hemihamate arthroplasty.

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Purpose: Distal radius fractures comprise the majority of hand- and wrist-related malpractice claims. We hypothesized that a majority of lawsuits would be for malunions resulting from nonsurgical treatment. Additional goals of this study were to quantify costs associated with claims, determine independent risk factors for making an indemnity payment, and illustrate trends over time.

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A survey regarding upper-extremity steroid injection practices was distributed to all active members of the American Society for Surgery of the Hand (ASSH) and American Shoulder and Elbow Surgeons (ASES) using SurveyMonkey. Response rates for the ASSH and ASES were 26% and 24%, respectively. The potency-adjusted dose of steroid injected for common hand and wrist injections ranged from 0.

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Surface water quality in catchments undergoing urbanisation may be affected by the release of pre-existing (or legacy) solutes, such as nutrients, as well as new sources associated with urban land use. This paper examines both for a number of urbanisation scenarios and adopting the modelling capability developed for the analysis of urbanisation effects on catchment water balance. The flat relief of the study catchment and its sandy soils, in combination with a Mediterranean-type climate, lead to large rates of diffuse gross recharge and diffuse (evaporative) discharge with low overall runoff from the catchment (<1mm per unit area).

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Locally administered corticosteroids are a common therapy in many hand and wrist disorders. Corticosteroids pose a theoretical risk to patients with diabetes mellitus by potentially raising blood glucose to hyperglycemic levels. Although oral corticosteroids are known to have an effect on blood glucose control, limited data exist on extra-articular administration.

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In basins combining flat-sandy valleys and hilly-bedrock sub-catchments, the assessment of nutrient (phosphorus) exports from low-runoff yielding environments is difficult. To overcome this issue hydrological modelling and high frequency phosphorus measurements were simultaneously employed. A coupled surface water-groundwater interaction model (MODHMS) was used to determine runoff from the low-runoff yielding part of the catchment.

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The neurovascular anatomy of the carpus and hand is complex. Therefore, precise exposures are required to avoid iatrogenic injury. In general, dorsal exposures are more forgiving than volar exposures because major neurovascular structures lie on the volar aspect of the hand and fingers; however, volar, ulnar, and radial approaches to the carpal bones are also commonly used.

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Article Synopsis
  • Displaced olecranon fractures can be treated effectively using open reduction and tension-band wiring, which is the focus of this study regarding the risk to nearby neurovascular structures in the forearm.
  • The study involved a simulated setup on 15 cadavers to measure distances from the tips of K-wires to important nerves and arteries during the percutaneous pinning of the ulna, finding some pins dangerously close to these structures.
  • Results indicated that adjusting the angle of K-wire insertion could reduce the risk of injury to the anterior interosseous nerve and ulnar artery, urging careful technique in surgical procedures related to the olecranon.
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The forearm contains many muscles, nerves, and vascular structures that change position on forearm rotation. Exposure of the radial shaft is best achieved with the Henry (volar) or Thompson (dorsal) approach. The volar flexor carpi radialis approaches are used increasingly for exposure of the distal radius.

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Integrated analysis of land use change and its effect on catchment water balance allows the selection of appropriate water and land management options for new urban developments to minimise the environmental impacts of urbanisation. A process-based coupled surface water-groundwater model was developed for Southern River catchment (Perth, Western Australia) to investigate the effect of urban development on catchment water balance. It was shown that urbanisation of highly permeable flat catchments with shallow groundwater resulted in significant increase in net groundwater recharge.

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Purpose: Closed reduction and percutaneous pinning is a reliable technique for treating 2- and 3-part distal radius fractures. There are currently no data that demonstrate the proximity of at-risk nerves and tendons during percutaneous placement of 5 commonly used K-wires. Whereas the previous literature notes the risk of superficial radial nerve injury with K-wire insertion into the radial styloid, the current study provides specific distances, not only to the superficial radial nerve (SRN) but also to the tendons of the first through fifth extensor compartments during K-wire insertion.

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Purpose: Steroid injections are commonly performed by hand surgeons for relief of symptoms associated with carpal tunnel syndrome. The purpose of this study is to examine the relationship of the needle to the median nerve within the carpal tunnel and to the palmar cutaneous branch, using 2 injection techniques.

Methods: Simulated carpal tunnel injections were performed on 15 cadaveric arms using 2 methods.

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This study compared patients with basal joint arthritis who underwent either ligament reconstruction tendon interposition (LRTI) or trapeziometacarpal interposition arthroplasty (TMIA). Twenty-two consecutive LRTI and 22 TMIA procedures were compared. Arthritis was graded using the staging system of Eaton.

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Purpose: The purpose of this study was to review the long-term outcomes of patients with distal radius fractures treated with closed reduction and percutaneous pinning.

Methods: We retrospectively reviewed 54 patients with 55 AO type A2, A3, C1, or C2 distal radius fractures treated with closed reduction and percutaneous pinning. The average age of the patients was 57 years.

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A 47-year-old man, a fine woodworker, sustained extensive phalangeal and soft tissue loss of his dominant left long and index fingers in a table saw injury. We report the long-term clinical and radiographic outcomes of the patient following reconstruction with corticocancellous iliac crest bone grafts. Rarely described in recent literature, we believe that primary nonvascularized autogenous bone grafting for phalangeal reconstruction is a worthwhile alternative to amputation when the soft tissue envelope is satisfactory.

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