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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
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Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
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Retained metallic foreign bodies in joints can cause complications. Ultrasound aids in locating these objects, enabling timely removal for preserved joint function and return to duty, even in remote settings.

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Area of Science:

  • Orthopedic Surgery
  • Diagnostic Imaging
  • Military Medicine

Background:

  • Intra-articular metallic foreign bodies pose risks including limited range of motion and plumbism.
  • Identifying retained metallic objects can be difficult with physical examination alone due to unpredictable trajectories.
  • Ultrasound offers a valuable tool for foreign body localization, particularly in resource-limited environments.

Purpose of the Study:

  • To highlight the challenges and successful management of an intra-articular metallic foreign body in a deployed Special Operations Forces Operator.
  • To emphasize the utility of ultrasound in identifying retained intra-articular metallic foreign bodies.
  • To advocate for the prompt removal of intra-articular metallic foreign bodies to ensure optimal patient outcomes.

Main Methods:

  • Case report of a Special Operations Forces Operator with a retained intra-articular metallic foreign body during a deployment.
  • Utilized ultrasound for the identification and localization of the metallic foreign body.
  • Surgical consultation and subsequent removal of the foreign body.

Main Results:

  • Successful identification and removal of the intra-articular metallic foreign body.
  • Preservation of the operator's range of motion post-removal.
  • Facilitation of the operator's return to duty in the deployed location.

Conclusions:

  • Prompt removal of intra-articular metallic foreign bodies is crucial for preventing long-term complications.
  • Ultrasound is an effective imaging modality for locating metallic foreign bodies in joints, especially in austere environments.
  • Effective management strategies can lead to favorable outcomes, including return to full duty.