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Pneumothorax medical treatment device

  • US 9,919,082 B2
  • Filed: 07/09/2014
  • Issued: 03/20/2018
  • Est. Priority Date: 07/09/2014
  • Status: Active Grant
First Claim
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1. A medical device for treating tension pneumothorax in a human patient, said device comprising:

  • a housing including an outlet, an interior chamber in fluid communication with the outlet and a needle mount in an end of the housing opposite to the outlet,a hollow needle including a proximal end and a distal end, the proximal end is seated in and secured to the needle mount of said housing, wherein the hollow needle extends from the housing to the distal end, the distal end is configured to penetrate a chest wall of the human patient and an exposed outer surface of the hollow needle is visible while the hollow needle is inserted into the chest wall,a hollow stylet permanently within and coaxial to the hollow needle, wherein the hollow stylet includes a proximal end extending into the interior chamber, a distal portion having a closed end, and an internal passage within the hollow stylet extending from the distal portion to an outlet at the proximal end of the hollow stylet,wherein the hollow stylet is slidably received in said hollow needle such that an outer surface of the hollow stylet slides against an inner surface of the hollow needle, and the hollow stylet slides between an extended position at which the closed end of the hollow stylet extends beyond the distal end of said hollow needle, and a retracted position at which the closed end of the hollow stylet is retracted within the hollow needle,said hollow stylet including at least one aperture in the distal portion and forming an inlet to the internal passage within the hollow stylet,a spring configured to bias said hollow stylet towards said extended position, wherein the spring is within the interior chamber of the housing, between the proximal end of the hollow stylet and the outlet to the housing, and does not overlap with the stylet, anda spring support fixed to the proximal end of the stylet and including a passage with an inlet aligned with the proximal end of the stylet and an outlet at an end of the spring in the interior chamber of the housing, wherein the spring support overlaps with the spring and the stylet.

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