Publications by authors named "Jonas Haentjes"

Femoral malrotation is a common complication after internal fixation of a femoral shaft fracture. The only valid, objective monitoring method is computer tomography-assisted torsion measurement between the proximal and distal femur; unfortunately, this can only be carried out postoperatively. A difference of 15° compared to the contralateral femur is seen as an indication for revision.

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Background: Patients with patent foramen ovale (PFO) and cryptogenic stroke are at risk of recurrence. Therapeutic regimens range from no treatment to anticoagulation treatment to surgical or interventional closure. However, long-term follow-up is only available for up to 4 years.

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Background: Prevalence of patent foramen ovale (PFO) with detectable right-to-left shunt is higher in young adults with transient ischemic attack (TIA) and stroke compared to the general population. So far, published series included different occluder systems, various indications and regimens of postprocedural anticoagulation. In our experience, occluder systems may be associated with an increased prevalence of thrombus formation, which has also reported by other groups.

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Introduction: In a complete dislocation of the talus, the talus is stripped of all its ligament connections in the triple articulated ankle joint. This case report describes the treatment and the 3-year follow-up of a complete dislocation of the talus with the use of intraoperative 3D imaging.

Patients And Methods: The 19-year-old patient was involved as a driver in a car accident.

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Article Synopsis
  • Developed a modular fixation system for precise pedicle screw placement in spinal surgeries.
  • Conducted a cadaver study implanting 16 pedicle screws across cervical, thoracic, and lumbar regions, verifying placement accuracy with advanced imaging techniques.
  • Results showed successful screw placements without technical issues or significant image artifacts, highlighting the effectiveness of the reference array clamp system in spinal navigation.
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