| 摘要 |
The invention provides for an improved medical device used to remove gas and liquid from the plural cavity between the lung and the chest wall in both stationary and mobile applications. The present invention generally comprises a hollow needle with a hollow closed end stylet slidably received in the needle. The stylet is spring-biased to extend out of the needle end as a safety tip but when pressured is moved to a retracted position to allow for insertion through the chest wall. The pressure needed to insert the needle/stylet combination through the chest wall is applied by a housing at the end of the needle which is contoured for easy grip. While not being applied to the chest wall, the stylet comprises a safety tip, which makes the device safe to handle and apply in stationary or mobile applications. Further, the housing includes a one-way valve is configured permit only the passage of air and bodily fluid out of the pleural cavity without a secondary structure needed. The present invention is useful in safely and effectively treating a variety of related conditions including pneumothorax (collapsed lung), tension pneumothorax (collapsed lung pressing on the heart), and pneumohemothorax (collapsed lung with air and bodily fluids in the pleural cavity). |
| 主权项 |
1. A medical device for treating tension pneumothorax in a human patient, said device comprising:
a housing with an outlet; a hollow needle with one end secured to said housing opposite said outlet and the other end extending from said housing, a stylet having a hollow inner passage, said stylet slidably received in said needle and moveable between an extended position, in which a closed end of said stylet extends beyond the end of said needle, and a retracted position, in which the closed end of said stylet does not extend beyond said needle, said stylet including at least one aperture adjacent said closed end of the stylet and fluidly connected to the hollow inner passage; a spring configured to bias said stylet towards said extended position; and a one-way valve, located in said housing, and fluidly connected to said stylet aperture, said valve configured to only permit gas flow into the stylet through the aperture and out of said outlet. |
