Surgery – Diagnostic testing – Sampling nonliquid body material
Reexamination Certificate
1999-11-15
2002-06-04
Thaler, Michael H. (Department: 3731)
Surgery
Diagnostic testing
Sampling nonliquid body material
C606S207000, C606S184000, C606S180000, C600S567000
Reexamination Certificate
active
06398741
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a newly developed tissue excision and cutting apparatus and resection forceps for cutting off a part of human tissue as a sample piece for such a diagnosis in laparoscopic surgery or the like.
PRIOR ART
A tissue excision and cutting apparatus for surgical operation has been used together with a forceps and a laparoscope and various kinds of such related apparatuses have been proposed till up now.
One example has a cylindrical resection blade rotated by a motor in a guide cylinder to be inserted into a trocar, and forceps for grasping an objective tissue inserted into the resection blade.
FIGS. 20
a
to
20
c
show how to use the tissue excision and cutting apparatus of prior art and the forceps to be combined therewith.
A tissue excision and cutting apparatus
101
, as shown in
FIG. 20
a
, comprises a main body
103
with grip portion, a guide cylinder
102
a
to be inserted into a trocar (not shown), and a resection blade
102
b
with a blade at its tip end which is driven to be rotated in the guide cylinder
102
a
by a motor (not shown).
On the other hand, a forceps
104
to be combined with the tissue excision and cutting apparatus
101
in such a manner as shown in FIG.
20
(
a
) has a main axis
104
a
with at its tip end a clamp
104
b
which can be opened and closed by manual operation of one hand.
According to such a tissue excision and cutting apparatus
101
, while observing around the tip end of the tissue excision and cutting apparatus
101
inserted into the trocar by a laparoscope (not shown), a tissue A may be grasped by the clamp
104
b
of the forceps
104
by approaching the forceps to the tissue A, after then the forceps
104
is withdrawn into the guide cylinder
102
a
in the state of grasping tissue A to bring it into contact with the blade of rotating resection blade
102
b
, by which a part of tissue A can be cut off as a sample piece (See
FIGS. 20
a
to
20
c
).
FIG. 21
shows a tissue excision and cutting apparatus according to the prior art in which a forceps and a resection blade are integrated wherein
FIG. 21
a
illustrates a front view of its partial vertical section and
FIG. 21
b
its rear view.
A tissue excision and cutting apparatus
111
, as shown in these figures, comprises a tissue cutting resection blade
112
composed of a cylindrical blade
112
b
and a guide cylinder
112
a
, a main body
113
with a grip
113
a
and holing portion
113
b
for the forceps
114
, a forceps
114
itself, a forceps withdrawing mechanism
115
with a trigger
115
a
for finger operation, a forceps open-close mechanism
116
with a finger operation part
116
a
, and a motor
118
for rotating the blade
112
b.
In this figure, turning operational direction of the open-close finger operation part
116
a
is shown as an arrow corresponding to open and close operations of the clamp
114
b
wherein opening direction is shown as an actual line and closing direction is shown as a dotted line, whereas sequential pulling operation of the trigger
115
a
is also shown by an arrow corresponding to with drawing operation of the forceps.
According to such a tissue excision and cutting apparatus
111
, operating a laparoscope (not shown) by a left hand while observing objective tissue with the apparatus
111
held by a right hand, and advancing the forceps
114
to the objective tissue, where the open-close operation part
116
a
is turned in a closing direction by a thumb C of the right B hand as shown in a dotted line in FIG.
21
(
b
), thus enabling to grasp the objective tissue by the clamp
114
b
of the forceps
114
.
After grasping the tissue A, the motor
118
is driven to rotate resection blade
112
b
and the trigger
115
a
is repeatedly operated by a forefinger D of the right hand B, thereby cutting off tissue A by the resection blade
112
b
in cylindrical shape. And the apparatus is so constructed that tissue thus grasped is prevented from dropping out even if the thumb C is departed from the open-close operation part
116
a.
According to the tissue excision and cutting apparatus
111
described above, comparing to the one shown in
FIG. 20
, the forceps can be operated by a thumb C and retraction can be executed by a forefinger D, with its main body held only by one hand, thus enabling another hand to operate a laparoscope or the like.
In any of above-mentioned tissue excision and cutting apparatus of the prior art, tissue is drawn into a guide cylinder and cut off therein while rotating a resection blade. Therefore, in such a method, tissue would not be sharply or finely cut off.
In other words, in such a method tissue is apt to be torn off and partly broken when tissue is drawn into the guide cylinder to be cut off so that it makes difficult to surely and sharply cut off the tissue, or the part of tissue could not be cut off well.
In addition, in such a prior tissue excision and cutting apparatus, the resection blade is exposed from a guide cylinder when tissue is cut off. Therefore, there would be a fear that organ not to be cut off or an end-bag (explained hereinafter referring to
FIG. 6
to
FIG. 9
) used for laparoscopic surgery happens to be damaged.
SUMMARY OF THE INVENTION
The present invention has proposed to solve the above-mentioned problems.
Accordingly, it is the primary object of the invention to provide a tissue excision and cutting apparatus which can finely and sharply cut off an objective tissue and a resection forceps to be used for the apparatus.
It is another object to provide a tissue excision and cutting apparatus which doesn't have such a fear and a forceps used for the apparatus.
In the present invention, a tissue excision and cutting apparatus used by inserted into a trocar for cutting off a part of tissue for sampling in laparoscopic surgery or the like comprises a resection blade with an inner hollow cylinder body having a cutting blade at its tip end, and a forceps for cutting off a part of tissue to be cut off as a sample piece.
The forceps has at its tip end a clamp for grasping a part of tissue which has a movable jaw capable of opening and closing and is joined to a fixed jaw vertically provided with a chopping block piece, an open-close mechanism with a hand operation part for opening and closing by manual operation, and a longitudinal penetrating passage into which the resection blade is inserted and moves back and forth therein.
The tissue excision and cutting apparatus is constructed such that resection blade and the forceps are combined with when using it.
The apparatus is characterized in that the penetrating passage of the forceps is constructed such that the resection blade is inserted into and moves back and forth therein and one of the clamp of the forceps is a fixed jaw provided at its chip end with a chopping block piece servicing as a stopper plate for the blade of resection blade. The chopping block piece functions as the so called chopping block for the blade of the resection blade, thereby enabling to cut off an objective tissue by pressing it in such manner as not in the prior pull-in-type tissue excision and cutting apparatus, thus any of tissues can be finely and surely cut off.
In addition, in the apparatus, other organ or an endo-bag isn't damaged because the resection blade is contained and hidden in the clamp of the forceps, thereby achieving safety.
If the shape of a part where the resection blade is contacted is contrived, tissue can be cut off not only by pressing on the resection blade a chopping block piece but also by shearing the resection blade and the chopping block piece. For example, when the chopping block piece is normally formed as such cylindrical shape that it has an inner diameter in which the outer diameter of cylindrical blade of the resection blade is just engaged, tissue can be sheared to be cut off by cylindrical shape, or the chopping block piece and the resection blade.
In other embodiment of the present invention, a tissue excision and cutting apparatus used by inserted into a trocar for cutting off a pa
Niizeki Ryuichiro
Tatsumi Masaya
J. Morita Manufacturing Corporation
Koda & Androlia
Thaler Michael H.
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