Surgery – Instruments – Cutting – puncturing or piercing
Reexamination Certificate
1999-01-20
2001-02-27
Buiz, Michael (Department: 3731)
Surgery
Instruments
Cutting, puncturing or piercing
C606S145000
Reexamination Certificate
active
06193737
ABSTRACT:
BACKGROUND OF THE INVENTION
The present disclosure relates to subject matter contained in Japanese Patent Application No. 10-25373 (filed on Feb. 6, 1998), which is expressly incorporated herein by reference in its entirety.
1. Field of the Invention
The present invention relates to a treating instrument for operative endoscopy that is inserted into a patient's body from a hole opened in the body surface and used under observation with an endoscope.
2. Description of the Prior Art
Many of treating instruments for operative endoscopy have a pair of treating members provided at the distal end of the insert part of an endoscope. The pair of treating members are opened or closed in a beaklike manner by remote control conducted at the proximal end of the insert part.
Such treating instruments for operative endoscopy include two different types: a bilaterally opening type in which both a pair of treating members are opened or closed in opposite directions through the same rotation angle; and a unilaterally opening type in which only one of a pair of treating members is rotatable to perform an opening and closing action, the other being fixed.
The unilaterally opening type is clumsy and likely to cause a misoperation because only one treating member is rotatable when the treating instrument is used to hold an affected part between the pair of treating members. For this reason, the bilaterally opening type is widely used.
When a treating instrument for operative endoscopy is inserted into a patient's body, if an affected part to be submitted to an operation lies on the front side of an organ, the above-described conventional bilaterally opening type of treating instrument can be effectively used. In such a case, the affected part can be readily held with the pair of treating members to perform the desired operation under endoscopic observation.
However, as shown in
FIG. 6
by way of example, if an affected part
101
to be submitted to an operation lies behind an organ
100
, it is difficult to hold the affected part
101
with a pair of treating members
51
. Therefore, there are cases where the intended operation cannot smoothly be performed.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a treating instrument for operative endoscopy designed so that even when an affected part to be treated is situated behind an organ, the affected part is readily held between a pair of treating members, thereby enabling an operation to be performed smoothly and safely under endoscopic observation.
Other objects and advantages of the present invention will become apparent from the following detailed description of illustrated embodiments of the invention.
According to the present invention, there is provided a treating instrument for operative endoscopy in which a pair of treating members are provided at the distal end of a sheath so that the pair of treating members are simultaneously opened or closed in a beaklike manner by remote control from the proximal end of the sheath. The treating instrument includes a driving device for driving the pair of treating members to perform respective opening and closing actions through different rotation angles. The driving device is provided at the distal end of the sheath.
REFERENCES:
patent: 487068 (1892-11-01), Drinkwater
patent: 5269804 (1993-12-01), Bales et al.
patent: 5308358 (1994-05-01), Bond et al.
patent: 5368606 (1994-11-01), Marlow et al.
patent: 5921984 (1999-07-01), Sutcu et al.
patent: 6114075 (1994-04-01), None
patent: 6296619 (1994-10-01), None
patent: 8140985 (1996-06-01), None
patent: 8164141 (1996-06-01), None
Asahi Kogaku Kogyo Kabushiki Kaisha
Buiz Michael
Greenblum & Bernstein P.L.C.
Ngo Lien
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