Surgery – Means for introducing or removing material from body for... – Material introduced into and removed from body through...
Reexamination Certificate
2001-12-26
2004-02-10
Hayes, Michael J. (Department: 3763)
Surgery
Means for introducing or removing material from body for...
Material introduced into and removed from body through...
C604S119000, C604S249000
Reexamination Certificate
active
06689088
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to irrigators, and particularly to an irrigator used in a celioscope surgery for preventing that dirty water is left in some bending portions. Therefore, dirty water can be pumped out completely.
2. Description of Related Art
An irrigator used in a celioscope surgery serves for pumping blood of a patient so as to sustain the cleanness of the surgical portion and thus the affected part can be viewed clearly.
FIGS. 5 and 6
shows a prior art irrigator. The irrigator is formed by a main casing
5
having a pumping opening
51
and a suction opening
52
which are engaged with the water pumping stud
6
and the water control stud
7
, respectively, above the pumping opening
51
and the suction opening
52
of the main casing
5
.
The main casing
5
has a water outlet channel
53
which is vertical to the pumping opening
51
and suction opening
52
. The portion conducting the water outlet channel
53
and the pumping opening
51
has a pumping region
54
with a large diameter, and the portion conducting the water outlet channel
53
and the suction opening
52
has an outlet region
55
with a large diameter. The main casing
5
has a water inlet channel
521
installed above the suction opening
52
. Thereby, when the water control stud
7
is pressed, the guide hole
71
of the water control stud exactly forms a flow guide channel with the outlet region
55
. Thereby, water may flow through the water outlet channel
53
to the affected part of a patient. The main casing
5
has a pumping flow channel
511
above the pumping opening
51
. Thereby, the via hole
61
of the water pumping stud
6
can be aligned with the pumping region
54
for pumping the water in the affected region.
In practical use, the irrigator is not an ideal device because of the following reasons:
1. It can not pump blood completely: since the water outlet channel
53
of the main casing
5
is not a straight one and in fact it passes through a bending portion at an top of the water outlet channel (i.e., the pumping region
54
), then the water passes through the second bending portion. Thereby, the impact of the blood is reduced and thus some dirty material may remain in the pipe. Especially at the connection of the water outlet channel
53
and the suction opening
52
(i.e., outlet region
55
). Since it cover a larger range, as the pumping pressure is not sufficient, it may enter this region so as to become a blind spot. Therefore, when the user presses the water control stud
7
again for conducting water flow, water (or blood) will remain in this outlet region
55
and then returns to the affected part of the patient so that the bacteria in the blood returns. As a result, the polluted area is enlarged.
2. It can not be held by only one hand
Since the prior art irrigator has pumping flow channel
511
and water inlet channel
521
at the tops of the pumping opening
51
and the suction opening
52
. Moreover, since the pumping opening
51
and the suction opening
52
are at the same horizontal plane. Therefore, the water inlet flow is slightly bent so as to separate from the pumping flow channel
511
. Therefore, the water inlet channel protrudes out of the main casing so that as the user holds it and presses it. The palm thereof exactly resists against the water inlet channel
521
. If the force applied is improper, it is possible that the water inlet channel
521
is pressed by an overlarge force so that the blood or water can not flow successfully. Therefore, the user must hold it by left hand and it induces a convenience in surgery.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide an irrigator used in a celioscope surgery, wherein the irrigator used comprises a main casing, a water pumping stud and a water control stud which are engaged with the main casing. An interior of the main casing has a pumping opening and a suction opening, and a water outlet channel and a pumping flow channel which are vertical to the pumping opening and suction opening. Thereby, the water outlet channel and pumping flow channel are at an upper portion of the main casing. Thereby, dirty water accumulated in the affected part can be drawn out from a water outlet tube through the pumping flow channel. Since the water is pumped out straightly, the dirty water is prevented from leaving in some bending portions. Therefore, dirty water can be pumped out completely.
Another object of the present invention is to provide an irrigator used in a celioscope surgery, wherein the water outlet channel and the pumping flow channel are above the main casing. Thus, user may hold it by any hand conveniently. Therefore, the user may use the present invention by any one of the two hands alternatively.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.
REFERENCES:
patent: 4270525 (1981-06-01), Furihata
patent: 5125910 (1992-06-01), Freitas
patent: 5312373 (1994-05-01), Freitas
patent: 5902264 (1999-05-01), Toso et al.
Ghafoorian Roz
Hayes Michael J.
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