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A Smart Sensing Cannula for Fat Grafting.

David M Turer1, Ehsan B Qaium1, April M Lawrence1

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Gluteal fat grafting is risky due to potential vein injury. A new cannula uses impedance sensing to detect muscle entry, aiming to prevent fatal fat embolisms during buttock augmentation procedures.

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Area of Science:

  • Plastic Surgery
  • Biomedical Engineering
  • Surgical Safety

Background:

  • Gluteal fat grafting carries significant safety risks, including a mortality rate as high as 1 in 3000.
  • Fat emboli, caused by gluteal vein injury during injection, are the primary cause of these mortalities.
  • Gluteal veins are located deep to the gluteal muscles, suggesting intramuscular injection avoidance is crucial.

Purpose of the Study:

  • To introduce a novel injection cannula designed to enhance safety in gluteal fat grafting.
  • To develop a system capable of real-time detection of cannula tip location relative to tissue planes.
  • To mitigate the risk of inadvertent gluteal vein injury and subsequent embolic complications.

Main Methods:

  • Development of an injection cannula equipped with impedance sensing technology.
  • The system is designed to differentiate between subcutaneous and intramuscular tissue planes.
  • Real-time feedback indicates when the cannula tip transitions from subcutaneous to intramuscular space.

Main Results:

  • The impedance sensing system successfully identified the cannula tip's location relative to tissue planes.
  • The system demonstrated the ability to detect the transition from subcutaneous to intramuscular tissue.
  • This technology offers a potential method to prevent intramuscular injections.

Conclusions:

  • The novel impedance-sensing cannula represents a promising advancement in gluteal fat grafting safety.
  • This technology may prevent inadvertent gluteal vein injury by guiding injections to the subcutaneous plane.
  • Further clinical validation is warranted to confirm the efficacy in reducing embolic complications.