Surgery – Instruments – Means for removing tonsils – adenoids or polyps
Reexamination Certificate
2000-03-24
2001-07-10
Smith, Jeffrey A. (Department: 3732)
Surgery
Instruments
Means for removing tonsils, adenoids or polyps
Reexamination Certificate
active
06258101
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates surgical instruments and particularly to an instrument for deploying devices such as surgical wire snares and wire baskets in procedures for removal of polyps in the colon, for the retrieval of polyps after polypectomy, and for endoscopic removal of gall stones, stents or foreign bodies. The instrument is useful in a variety of applications wherein a device is manipulated through reciprocal and rotary motions by an output shaft forming part of the instrument. In particular applications, the instrument is useful for imparting reciprocating and rotary motion to snares and baskets used in surgery which are specified for the purpose of illustrating and describing the invention.
Wire snares and baskets comprise a sheath usually of Teflon encasing a wire passing through the sheath and extending from both ends thereof. The near end of the sheath is secured to an instrument for moving the wire back and forth in the sheath so as to open and close a snare or basket formed at the far end of the wire beyond the far end of the sheath. An instrument also orients the snare or basket by rotation of a wire within its sheath. In deploying snares and baskets in a surgical procedure, a hand-held instrument is used to orient, to open and to close snare or basket for a specific task.
SUMMARY OF THE INVENTION
The present invention provides a new and improved instrument for the deployment of surgical devices such as wires and snares wherein one hand manipulates a device including advancing, rotating, and retracting the device to advance the device to an operating site, to rotate for orientation as necessary, and to open and close a wire or snare to accomplish a specific task in a surgical procedure.
In a preferred embodiment, the instrument includes an elongate frame with rotatable output shaft within a sheath for deploying a surgical device such as a snare or basket and the like. The frame is in assembly with a finger carriage which is slidably and pivotally mounted on the frame and which includes a mechanism for rotating the output shaft. A thumb finger hole at the top of the frame and finger holes in the finger carriage provide for manipulation of the instrument in one hand to accomplish advance and retraction of the output shaft and basket or snare by linear sliding of the finger carriage with respect to the frame, and rotation of the output shaft by pivoting the carriage side to side with respect to the direction of linear motion. The instrument mechanism is arranged so that the output shaft can be rotated in all positions along the linear advance-retract excursion of the finger carriage and output shaft.
A surgical instrument according to the invention provides simultaneous rotation and reciprocation of an output shaft, with smooth and low operational force, and with precise manipulation of a surgical device with one hand. For purposes of illustration and specification, the instrument according to the invention is described with particular reference to surgical snares and baskets. This is done with an understanding that the instrument has utility in both reciprocating and rotating an output shaft and that the shaft and its movement are useful with other devices than baskets and snares.
OBJECTS OF THE INVENTION
An object of the invention is to provide a new and improved instrument for deploying devices in medical procedures.
Another object of the invention is to provide an instrument for one hand deployment of medical devices with simultaneous rotary and reciprocal movement.
Another object of the invention is to provide an instrument for manipulating wire baskets and snares having elongate frame with thumb hole, output shaft carried by the frame, and movable finger carriage mounted on the frame for simultaneous rotary and reciprocating manipulation of the output shaft with wire and basket.
Other and further objects of the invention will become apparent with an understanding of the following detailed description of the invention or upon employment of the invention in practice.
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patent: 5176677 (1993-01-01), Wuchinich
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patent: 5456689 (1995-10-01), Kresch et al.
patent: 5782834 (1998-07-01), Lucey et al.
patent: 5980510 (1999-11-01), Tsonton et al.
Lacey Manufacturing Company, Inc.
Robert Eduardo C.
Smith Jeffrey A.
Walsh Patrick J.
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