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  1. Article: More Than Meets the Eye.

    Soyland, Dallas / O'Connor, Hunter / Freeman, Jerome W

    South Dakota medicine : the journal of the South Dakota State Medical Association

    2023  Volume 75, Issue 10, Page(s) 472–473

    Language English
    Publishing date 2023-02-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2278073-7
    ISSN 0038-3317
    ISSN 0038-3317
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Clinical Practice Update: Achilles Tendon Rupture.

    O'Connor, Hunter A / Adams, Luke W / Skelley, Nathan Wm

    South Dakota medicine : the journal of the South Dakota State Medical Association

    2023  Volume 76, Issue 8, Page(s) 363–366

    Abstract: Achilles tendon rupture is a common injury. It most often occurs in middle aged men who participate in recreational sports. The injury classically presents with a loud popping noise and immediate pain and weakness of the lower extremity during actions ... ...

    Abstract Achilles tendon rupture is a common injury. It most often occurs in middle aged men who participate in recreational sports. The injury classically presents with a loud popping noise and immediate pain and weakness of the lower extremity during actions such as jumping or running. The diagnosis is made clinically, but an MRI is often obtained for confirmation of rupture and to aid in surgical planning. Treatment is either operative, with open or minimally invasive approaches, or non-operative, with functional bracing or plaster casting. Surgical treatment was preferred for much of the 20th century, but non-operative treatment has gained significant favor in the past 15 years as new evidence has demonstrated similar long-term outcomes to surgery. Neither treatment option is currently considered superior to the other in all cases. Surgery is associated with a risk for surgical complications and is, therefore, often a poor option for the elderly and those with significant comorbidities. Non-operative management is associated with an increased risk for re-injury which is often undesirable for young and highly active patients. Ultimately, the goals and priorities of each individual patient should guide the decision of which treatment option to pursue.
    MeSH term(s) Aged ; Male ; Middle Aged ; Humans ; Achilles Tendon ; Tendon Injuries/diagnosis ; Tendon Injuries/therapy ; Lower Extremity ; Pain ; Running
    Language English
    Publishing date 2023-09-21
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2278073-7
    ISSN 0038-3317
    ISSN 0038-3317
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Rapid expansion of post traumatic syringomyelia following parathyroidectomy: A case report and review of the literature.

    O'Connor, Hunter A / Thanel, Paul F / Dirks, Shouri K / Alchaki, Abdul R

    Surgical neurology international

    2023  Volume 14, Page(s) 178

    Abstract: Background: Post-traumatic syringomyelia (PTS) is an uncommon complication of spinal cord injury (SCI) characterized by development of a fluid filled cavity in the spinal cord parenchyma. Presentation involves pain, weakness, and abnormal reflexes. ... ...

    Abstract Background: Post-traumatic syringomyelia (PTS) is an uncommon complication of spinal cord injury (SCI) characterized by development of a fluid filled cavity in the spinal cord parenchyma. Presentation involves pain, weakness, and abnormal reflexes. There are few known triggers for disease progression. We present a case of symptomatic PTS that appears to have been triggered by parathyroidectomy.
    Case description: A 42-year-old female with a distant history of SCI developed clinical and imaging findings consistent with acute expansion of PTS immediately following parathyroidectomy. Her symptoms included acute numbness, tingling, and pain in both arms. Magnetic resonance imaging (MRI) revealed a syrinx in the cervical and thoracic spinal cord. However, this was initially misdiagnosed as transverse myelitis and was treated as such without resolution of symptoms. Over the following 6 months, the patient experienced progressive weakness. Repeat MRI demonstrated expansion of the syrinx with new involvement of the brain stem. The patient was diagnosed with PTS and referred for outpatient neurosurgery evaluation at a tertiary facility. Treatment was delayed due to problems with housing and scheduling at the outside facility, allowing for continued worsening of her symptoms. The syrinx was surgically drained and a syringo-subarachnoid shunt was placed. Follow-up MRI confirmed correct placement of the shunt as well as resolved syrinx and decreased thecal sac compression. The procedure effectively halted symptom progression but did not resolve all symptoms completely. The patient has regained her ability to perform much of her activities of daily living but remains in a nursing home facility.
    Conclusion: There are currently no cases of PTS expansion following non-central nervous system surgery reported in the literature. The reason for PTS expansion following parathyroidectomy in this case is unknown but may highlight the need for extra caution when intubating or positioning a patient with a history of SCI.
    Language English
    Publishing date 2023-05-19
    Publishing country United States
    Document type Case Reports
    ISSN 2229-5097
    ISSN 2229-5097
    DOI 10.25259/SNI_30_2023
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: 3D Printed Orthopaedic External Fixation Devices: A Systematic Review.

    O'Connor, Hunter A / Adams, Luke W / MacFadden, Lisa N / Skelley, Nathan Wm

    3D printing in medicine

    2023  Volume 9, Issue 1, Page(s) 15

    Abstract: Background: External fixators are complex, expensive orthopaedic devices used to stabilize high-energy and complex fractures of the extremities. Although the technology has advanced dramatically over the last several decades, the mechanical goals for ... ...

    Abstract Background: External fixators are complex, expensive orthopaedic devices used to stabilize high-energy and complex fractures of the extremities. Although the technology has advanced dramatically over the last several decades, the mechanical goals for fracture stabilization of these devices have remained unchanged. Three-dimensional (3D) printing technology has the potential to advance the practice and access to external fixation devices in orthopaedics. This publication aims to systematically review and synthesize the current literature on 3D printed external fixation devices for managing orthopaedic trauma fractures.
    Methods: The Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) protocols were followed for this manuscript with minor exceptions. PubMed, Embase, Cochrane Review, Google Scholar, and Scopus online databases were systematically searched. Two independent reviewers screened the search results based on predetermined inclusion and exclusion criteria related to 3D printing and external fixation of fractures.
    Results: Nine studies met the inclusion criteria. These included one mechanical testing study, two computational simulation studies, three feasibility studies, and three clinical case studies. Fixator designs and materials varied significantly between authors. Mechanical testing revealed similar strength to traditional metal external fixators. Across all clinical studies, five patients underwent definitive treatment with 3D printed external fixators. They all had satisfactory reduction and healing with no reported complications.
    Conclusions: The current literature on this topic is heterogeneous, with highly variable external fixator designs and testing techniques. A small and limited number of studies in the scientific literature have analyzed the use of 3D printing in this area of orthopaedic surgery. 3D printed external fixation design advancements have yielded promising results in several small clinical case studies. However, additional studies on a larger scale with standardized testing and reporting techniques are needed.
    Language English
    Publishing date 2023-06-07
    Publishing country England
    Document type Journal Article
    ISSN 2365-6271
    ISSN (online) 2365-6271
    DOI 10.1186/s41205-023-00180-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Mechanical Analysis of a Novel 3D-printed External Fixator Design Versus Industry-standard External Fixators.

    MacFadden, Lisa N / Adams, Luke W / Boerhave, Clint / O'Connor, Hunter A / VanDerWolde, Brooklyn K / Skelley, Nathan Wm

    The Journal of the American Academy of Orthopaedic Surgeons

    2024  Volume 32, Issue 7, Page(s) e331–e345

    Abstract: Introduction: External fixation is a critical component of orthopaedic fracture management and is used for various conditions, including trauma and pediatric orthopaedics. However, the availability and high cost of external fixation devices are a ... ...

    Abstract Introduction: External fixation is a critical component of orthopaedic fracture management and is used for various conditions, including trauma and pediatric orthopaedics. However, the availability and high cost of external fixation devices are a concern, especially in rural and developing countries. 3D printing technology has shown promise in reducing manufacturing costs and improving accessibility to external fixation devices. The purpose of this study was to evaluate the mechanical properties of a fully 3D-printed desktop external fixation device and compare the results with the mechanical properties of commonly used, clinically available external fixators.
    Methods: A fully 3D printable external fixator was designed and printed in polylactic acid at two infill densities, 20% and 100%. The mechanical properties of the 3D-printed external fixators and several commercially available fixators were tested according to applicable sections of the American Society for Testing and Materials F1541 standard protocol in axial, medial-lateral, and anterior-posterior orientations. The primary outcomes measured included failure load, safe load, rigidity, and yield load. The mean differences between experimental and control groups were calculated using one-way analysis of variance and Tukey tests.
    Results: The 20% infill 3D-printed construct showed poor performance compared with commercially available external fixators in all testing conditions and across most variables. The 100% infill 3D-printed construct was comparable with or superior to all commercially available devices in most testing conditions. The cost for printing a single 3D-printed 100% infill external fixator was $14.49 (United States Dollar).
    Discussion: This study demonstrates that a low-cost desktop 3D printer can create an entirely 3D-printed external fixator that resists clinically relevant forces similar to medical-grade industry-standard external fixators. Therefore, there is potential for customizable and low-cost external fixators to be manufactured with desktop 3D printing for use in remote areas and other resource-constrained environments for fracture care.
    MeSH term(s) Child ; Humans ; United States ; External Fixators ; Fractures, Bone ; Orthopedics ; Prostheses and Implants ; Printing, Three-Dimensional
    Language English
    Publishing date 2024-02-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1200524-1
    ISSN 1940-5480 ; 1067-151X
    ISSN (online) 1940-5480
    ISSN 1067-151X
    DOI 10.5435/JAAOS-D-23-00926
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Fatal Accidental Drowning in Minnehaha County, South Dakota, 1880-1939.

    Schulte, Lillian / Petersen, Emily / O'Connor, Hunter / Mohs, Joshua / Reuter, Andrew / Travers, Henry

    South Dakota medicine : the journal of the South Dakota State Medical Association

    2022  Volume 76, Issue 10, Page(s) 465–474

    Abstract: Drowning is currently the second leading cause of injury-related death for children 1-4 years of age in the United States and is the leading cause of death worldwide for boys ages 5-14 years. The World Health Organization (WHO) classifies it as a public ... ...

    Abstract Drowning is currently the second leading cause of injury-related death for children 1-4 years of age in the United States and is the leading cause of death worldwide for boys ages 5-14 years. The World Health Organization (WHO) classifies it as a public health threat and advocates for reducing drowning deaths by understanding geographical, cultural, and societal risk factors. To these three we added a fourth: historical studies. To that end, we analyzed accidental causes of death between January 1, 1880, and December 31, 1939, in Minnehaha County, South Dakota, based on interment records from the Mt. Pleasant Cemetery. From these six decades (1880-1939) of data, we classified 217 cases as accidental deaths. Drowning was the leading cause of accidental mortality, accounting for 50 accidental deaths (23%). Drowning deaths were analyzed by the decedents' age and date of death. We discuss specific historical drowning risk factors and hypothesize how they may have affected drowning deaths from 1880-1939 in Minnehaha County.
    MeSH term(s) Child ; Male ; Humans ; Infant ; Child, Preschool ; Adolescent ; Drowning/epidemiology ; South Dakota/epidemiology ; Cause of Death ; Risk Factors ; Medical History Taking
    Language English
    Publishing date 2022-10-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2278073-7
    ISSN 0038-3317
    ISSN 0038-3317
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Myocarditis in Minnehaha County, South Dakota, 1880-1939.

    Petersen, Emily / Schulte, Lillian / O'Connor, Hunter / Reuter, Andrew / Mohs, Joshua / Travers, Henry

    South Dakota medicine : the journal of the South Dakota State Medical Association

    2022  Volume 76, Issue 10, Page(s) 455–462

    Abstract: From 1920 to 1940 in Minnehaha County there was an apparent striking increase in the incidence of fatal myocarditis and chronic myocarditis. Based on an analysis of the interment records of the Mt. Pleasant Cemetery, word frequency studies in two ... ...

    Abstract From 1920 to 1940 in Minnehaha County there was an apparent striking increase in the incidence of fatal myocarditis and chronic myocarditis. Based on an analysis of the interment records of the Mt. Pleasant Cemetery, word frequency studies in two prominent American medical journals and a general review of related medical publications, we explore this increase. We conclude that there was no actual increase in the frequency of inflammatory disorders of the myocardium in Minnehaha County during this period. Rather, it appears that the use of the diagnostic terms was a matter of choice among local physicians that was not supported by contemporaneous clinical and pathophysiologic publications in available journals.
    MeSH term(s) Humans ; United States ; Myocarditis/diagnosis ; Myocarditis/epidemiology ; South Dakota/epidemiology ; Incidence
    Language English
    Publishing date 2022-10-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2278073-7
    ISSN 0038-3317
    ISSN 0038-3317
    Database MEDical Literature Analysis and Retrieval System OnLINE

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