Thoracentesis device with hyper-sensitive detection mechanism

A technique of puncture and thoracotomy, applied in the direction of puncture needles, suction instruments, surgery, etc., can solve the problems of unintentional puncture and no way to show
CN1433329AInactive Publication Date: 2003-07-30SHERWOOD SERVICES AG
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHERWOOD SERVICES AG
Publication Date
2003-07-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

A thoracentesis device (10) having a hypersensitive dual spring indication mechanism (16) (18) for alerting the user of any contact to internal body organs by the blunt tip distal end (32) of the thoracentesis device (10) once the device (210) has been inserted inside the patient's body. The thoracentesis device (10) includes a handle, an outer needle (30) having a longitudinal conduit (34) in fluid communication with a cavity (50) defined inside the handle (11). A spring loaded inner needle (28) is slide disposed inside the conduit (34) with the proximal portion of the inner needle (28) operably engaged with a large spring (22) that imparts a sufficient distal spring force to fully extend the blunt tip end (32) of the inner needle (28) beyond the sharp distal tip (54) of the outer needle (30).
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Description

Invention field

[0001] The present invention relates to a medical device for performing thoracentesis, and more particularly to a thoracentesis device for extracting fluid from the thoracic cavity. In particular, the present invention relates to a thoracentesis instrument with a high-sensitivity double-spring detection mechanism, which greatly reduces the possibility of the instrument puncturing or puncturing the lung during thoracentesis. Background technique

[0002] Thoracentesis involves drawing or removing fluid from between the lungs and chest wall of patients with certain chest traumas. In order for the lungs to expand properly and fully recover, the removal of fluid from the chest cavity is a necessary procedure. In the prior art thoracentesis, the user makes an incision through the chest wall and inserts a catheter or other tube through the incision and into the chest cavity. The proximal end of the catheter is then connected to a negative pressure source, such as a luer...

Claims

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