Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
1998-03-19
2001-04-17
Mendez, Manuel (Department: 3763)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
C604S167030, C604S256000, C604S264000
Reexamination Certificate
active
06217556
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to catheters and in particular to a drainage catheter.
BACKGROUND OF THE INVENTION
Use of devices for the therapeutic or diagnostic aspiration of fluid or air from the thoracic or abdominal cavities is known in the art. The aspiration of fluid or air from the thoracic or abdominal cavities is desirable in relieving symptoms caused by fluid or air build up in such cavities. Drainage catheters are also used to supply physicians with samples from the thoracic or abdominal cavities for analysis. Generally, drainage catheters employ a catheter needle, a needle hub, a stop cock, and a self-sealing valve. The catheter is permanently bonded to the stop cock, and the stop cock is permanently bonded to the self-sealing valve.
Devices of the prior art, however, are not suitable for use as a long-term drainage catheters because of the weight and bulk of the device. Thus, physicians are required to use multiple drainage catheters because of the failure of prior devices to act as long-term drainage devices.
What would thus be advantageous would be to provide a catheter which was suitable for use for the therapeutic or diagnostic aspiration of fluid or air from the thoracic or abdominal cavities. The device would additionally be capable of use as a long term drainage catheter. Such a design would achieve the advantages without significantly adding cost.
SUMMARY OF THE INVENTION
The present invention provides a drainage catheter for the therapeutic or diagnostic aspiration of fluid or air from the thoracic or abdominal cavities. The present invention can be used as a long-term drainage catheter. The present invention does so without adding appreciably to the cost of the prior art devices.
The present invention provides a catheter needle, a catheter, a needle hub, a stop cock, and a self-sealing valve. The stop cock is removably secured to the catheter by use of a Luer connection. The stop cock is additionally removably secured to the self-sealing valve, again by use of a Luer connection. Use of the Luer connection allows the catheter to be disassembled from the stop cock as well as allows the stop cock to be disassembled from the self-sealing valve.
The catheter needle can be inserted into the patient to perform therapeutic or diagnostic aspiration of fluid or air from the thoracic or abdominal cavities. Upon completion of this procedure, the catheter can be disassembled and can be used as a long term drainage catheter. Thus, the present invention can be used with other medical equipment, such as a house vacuum, any drainage system, syringe, or valve, for use with additional medical procedures within the thoracic or abdominal cavities by simply connecting such medical equipment to the standard Luer lock provided on the catheter.
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Clark Grant
Ellingson Eric
Groenke Greg
Raine Randy
Visconti Peter
Allegiance Corporation
Mendez Manuel
Nickey Donald O.
Rozycki Andrew G.
Schaafsma Paul E.
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