Tube cutting and separating implement for conduit of blood or the like

A tube cutting and separating implement for a conduit comprising a grasping body formed to insert the conduit therethrough and having a first section separable from a separating portion and a second section. The first and second sections respectively have first and second flow stopping portions for grasping the conduit to stop the flow and first and second holding portions for holding the flow stopping state. A cutter is disposed at the first or second section at a position displaced from the flow stopping portions for cutting the conduit. Thus, the implement can stop flow at two positions of the conduit by a simple operation and cut the conduit and separate the implement into two sections so as to allow a patient to simply and rapidly be released without loss of blood in case of an emergency.

BACKGROUND OF THE INVENTION 
This invention relates to a tube cutting and separating implement for a 
conduit of blood or the like, attached to a tube for conducting the blood, 
flow of or various types of chemical solutions or gases. The implement is 
for cutting and separating the tube by a manual operation without losing 
blood when a defect occurs so that a patient dialysing in a hospital can, 
for example, release himself. The device also permits isolation of a 
dangerous medicine can be carried out rapidly. 
A renal patient must be treated by artificial dialysis for 5 to 8 hours 
once every three days so as to purify one's blood against toxicity as is 
well known. As shown in FIG. 10, a blood circuit is closed by coupling the 
patient's body A with an artificial kidney B through a tube C used as a 
conduit for the blood. In this case, the coupling ends C', C' of the tube 
C are connected to the patient's arms so as not to be removed. Thus, the 
patient must remain on a bed and cannot freely move. 
Therefore, if a disaster such as an earthquake or a fire tkes place, the 
patient cannot escape. Thus, as shown in FIG. 11, the tube C is held using 
a nurse by clips D, D' to thereby stop blood flow, and cut between the 
clips D and D' by a pair of scissors E, and the patient may escape while 
attached to the coupling ends C', C'. 
SUMMARY OF THE INVENTION 
Accordingly, an object of this invention is to provide a tube cutting and 
separating implement for a conduit of blood or the like which can 
eliminate the abovementioned drawbacks and can stop blood flow at two 
positions of a tube by a simple operation and cut the tube between the two 
positions while the blood is stopped. The cutting and separating 
implements are separated into two sections so as to allow the patient to 
simply and rapidly release himself without losing blood such as shown in 
FIG. 10. Cutting and separating implements F, F' of suitable construction 
are attached to stop the blood flow at two positions merely by a simple 
operation of grasping implements F, F' which are separated to allow the 
patient to simply and rapidly escape without losing the blood. The 
implement can also be used to seal and sever various medical and 
industrial conduits. 
In order to achieve the above and other objects, there is provided 
according to this invention a tube cutting and separating implement for a 
conduit of blood or the like comprising a grasping body formed to insert a 
tube or conduit therethrough and having a first section separable from a 
second section. The first and second sections respectively have first and 
second flow stopping portions for grasping the tube to stop the flow by 
pressing the body, and a cutter disposed in the first or second section at 
a position displaced from the flow stopping portons for cutting the tube 
by pressing the body. The flow stopping state is held by the first and 
second holding portions and the cutter cuts the tube between the first and 
second flow stopping portions. 
Further, the first and second sections can be separated by a simple 
operation such as by bending the separate portions, cutting by the cutter 
or removing. Thus, in case of emergency a patient during an artificial 
dialysis can escape while the coupling ends C', C' of the tube C remain 
attached. 
The above and other related objects and features of the invention will be 
apparent from a reading of the following description of the disclosure 
found in the accompanying drawings and the novelty thereof pointed out in 
the appended claims.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
This invention will be described in detail with respect to embodiments 
shown in FIGS. 1 to 3. A grasping body 1 formed by an elastic 
transformably synthetic resin or the like has a first section 2 on the 
left side and a second section 3 on the right side. In the first and 
second embodiments in FIGS. 1 and 2, the sections 2 and 3 are integral, 
and in the third embodiment in FIG. 3, the sections 2 and 3 are separately 
formed. 
The body 1 in FIG. 2 has a transformable outer peripheral frame 1c formed 
annularly so that ends 1a and 1b are opposed, and the first and second 
sections 2 and 3 have first and second flow stopping portions 2b and 3b 
formed of first and econd upper projections 2a and 3a disposed at the 
upper position of frame 1c and slightly displaced leftward and rightward 
and projected toward first and second lower projections 2a' and 3a'. 
Adjacent to the first and second projections 2a and 3a, are the first and 
second holding portions 2d and 3d formed with the first and second upper 
pawl pieces 2c and 3c adjacent to first and second lower pawl pieces 2c' 
and 3c' to be engaged wit one another by manual operation as will be 
described in detail. 
In the exemplified embodiment, at the first section 2, a cutter 4 is 
downwardly projected from the frame 1c. Reference numeral 4a designates 
the engaging groove of the cutter 4 formed by projecting strips 4b, 4b' 
from the frame 1c, and the cutter 4 is provided at a position displaced 
from the fist flow stopping portion 2b of the first section 2. 
A numeral 5 designates a hole for inserting a tube C for a conduit formed 
by rubber or the like. In the first and second embodiments in FIGS. 1 and 
2, the hole 5 is formed of first and second outer holes 5a, 5a' formed in 
the lower left and right sides of the frame 1c and first and second inner 
holes 5b, 5b' formed in the first and second lower pawl pieces 2c' and 
3c'. 
In the first embodiment in FIG. 1, at the first section 2, the cutter 4 is 
projected downward between the right end side of the first flow stopping 
portion 2b and the first holding portion 2d, while in the second 
embodiment in FIG. 2, the cutter 4 is formed at the rightmost. Numeral 4c 
in FIG. 1 designates a tube bearing strip projected upward from the frame 
1c so as to readily cut the tube C by the cutter 4 as will be described in 
detail. 
Further, in the invention, the body 1 is formed with a separating portion 6 
for readily separating the first section 2 from the second section 3. 
The separating portion 6 in FIG. 1 is formed of a thin film 6a for breakage 
obtained by forming a scribing line from the inside of the frame 1c 
between the first lower pawl piece 2c' and the second lower pawl piece 3c' 
to be readily bent by one hand operation. 
The separating portion 6 in FIG. 2 is formed of a thin film 6b for breakage 
formed at the frame 1c at the position directly under the cutter 4. The 
separating portion 6 is cut by the cutter 4 by applying a grasping force 
by manual operation of the body 1, and cutting the tube c by the cutter 4, 
thereby separating the sections 2 and 3. In this embodiment, the portion 6 
is between rising legs 6' and 6' projected from the lower center of the 
frame 1c. 
In the third embodiment in FIG. 3, the second section 3 has a separate 
second flow stopping portion 3b and a second holding portion 3d, which are 
contained detachably in a recess 2" formed at the lower right end of the 
U-shaped outer peripheral housing 2'. 
Therefore, the separating portion in this third embodiment is not formed in 
a thin film, but is formed of separate second and first sections 3 and 2 
in a contacting structure. 
In FIG. 3, numeral 2e designates a pressing strip for pressing the second 
upper pawl piece 3c to be engaged with the second lower pawl piece 3c' of 
the second section 3 of separate member. In this third embodiment, the 
second inner hole 5b' and the second outer hole 5a' are formed in the 
separate second section 3, at the second lower pawl piece 3c' and the 
second upper pawl piece 3c. 
In using the cutting and separating implement of these first to third 
embodiments, the tube C is inserted into the hole 5 of the first and 
second outer holes 5a, 5a' then first and second inner holes 5b, 5b' to a 
suitable position, i.e., in the case of an artificial dialysis, as shown 
in FIG. 10. 
If an emergency such as an earthquake or a fire takes place, the patient 
grasps by right and left hands the frame 1c of the body 1 in FIGS. 1 and 2 
and the outer housing 2' of the first section 2 in FIG. 3 to collapse it. 
Thus, as shwon in FIGS. 1(b) to 3(b) , the first and second upper 
projections 2a, 2b and the first and second lower projections 2a', 3a' 
approach to allow the first and second flow stopping portions 2b and 3b to 
collapse the tube c to stop the flow. At this time, the first and second 
upper pawl pieces 2c, 3c and the first and second lower pawl pieces 2c', 
3c' are engaged to hold the flow stopping state, and the cutter 4 cuts the 
tube C. 
Then, a patient who is treated by an artificial dialysis, as in the case of 
FIG. 1, further bends the frame 1c to damage the thin film 6a for 
breakage, thereby separating the first section 2 and the second section 3 
as shown in FIG. 1(c). Thus, the patient can be released from tube C with 
the coupling end C' and the separated second section 3 attached. 
In case of FIG. 2, the patient does not need to bend the frame as described 
above, but can cut the thin film 6b for breakage by the cutter 4 merely by 
a grasping operation. Thus the first and second sections 2, 3 can be more 
rapidly separated. 
Further, in the third embodiment in FIG. 3, after the above grasp 
operation, the grasping is then released, the and patient then pulls the 
coupling end c' in the direction of an arrow G in FIG. 3(c). Thus, the 
separate second section 3 is drawn from the first section 2, thereby 
rapidly separating both sections 2 and 3. 
The, fourth to seventh embodiments in FIGS. 4 to 7 according to this 
invention will be further described. In the case of the fourth embodiment 
in FIG. 4, the second section 3 is separated from the first section 2 and 
disposed in a U-shaped outer peripheral housing 2' of the first section 2, 
at the lower right side in the same manner as the third embodiment in FIG. 
3, but is different in that the second secton 3 is a bent elastic plate 
substantially in a C shape and capable of being annularly closed by an 
inherent elastic force. 
More particularly, the second section 3 is normally constructed so that the 
second flow stopping portion 3b is formed of a second upper projection 3a 
forced apart from a second lower projection 3a' which contact one another 
due to the inherent elastic recovery force. 
A second difference resides in the separating portion. In the third 
embodiment in FIG. 3, the second section 3 is detachably contacted with 
the recess 2' of the first section 3. In the fourth embodiment, the second 
upper projection 3a and the second lower projection 3a' are separated 
against the elastic force are detachably engages with the upper end 7a and 
the lower end 7b of the separating projection 7 projected from the lower 
center of the outer peripheral housing 2' of the first section 2. Thus the 
second flow stopping portion 3b of the second section 3 is opened by the 
bent elastic plate, thereby forming the separating portion. 
A pressing strip 2e' for depressing an upper folding piece 8 of the second 
upper projection 3a of the second section 3 is projected from the upper 
right side of the housing 2'. In the fourth embodiment, the second outer 
hole 5a' is formed in the second section 3, and the first innermost hole 
5c is formed in the separating projection 7. 
Therefore, in the fourth embodiment in FIG. 4, when the outer peripheral 
housing 2' of FIG. 4(a) is grasped in the state that the tube C is 
inserted into the hole 5, the pressing strip 2e' presses the upper folding 
piece 8 of the upper projection 3a, and thus the second upper projection 
3a and the second lower projection 3a' separate from the upper end 7a and 
the lower end 7b of the separating projection 7. 
As a result, the second section 3 is returned to the normal state as shown 
in FIG. 4(b) by the elastic returning force, the tube C is closed between 
the second upper projection 3a and the second lower projection 3a', the 
flow stopping state is held, and the cutter 4 provided in the same 
construction as in FIG. 3 cuts the tube C. Accordingly, the patient can 
release the second section 3 from the first section 2 remaining attached 
with the coupling end C'. 
In a fifth embodiment in FIG. 5, not only the second section 3 is formed 
separately by bending an elastic plate similar to FIG 4, but also the 
first section 2 is formed of an elastic flow stopping piece 2'" mounted 
detachably at the outer peripheral housing 2'. 
More particularly, not only a cutter 4 is projected downward similar to the 
case of FIG. 4 at the upper center of the outer peripheral housing 2' of 
the first section 2, but also a flow stopping projection 9 substantially 
the same as that corresponding to the separating projection 7 described in 
detail with respect to FIG. 4 is projected at the left side of the cutter 
4 at the lower side. First upper projection 2a and first lower projection 
2a' of the elastic flow stopping piece 2'" are bent from an elastic plate 
art substantially the same in shape as the second section 3 and are 
engaged with the upper end 9a and the lower end 9b of the projection 9. 
The elastic flow stopping piece 2"' is bent so that the first upper and 
lower projection 2a, 2a' are normally, elastically contacted with one 
another and when the elastic flow stopping piece 2'" is removed from the 
flow stopping projection 9 as will be described in detail. The bent 
portion of the elastic flow stopping piece 2'" performs the role of the 
first holding portion 2d, and the closing state of the first flow stopping 
portion 2b by the first upper and lower projections 2a, 2a' is 
accomplished by the elastic force of the bent portion. 
Further, not only a pressing projection 2e' is projected similarly to the 
fourth embodiment of FIG. 4 at the upper side of the outer peripheral 
housing 2', but also a pressing projection 2e" is projected in the 
opposite direction of the cutter 4. As described with respect to FIG. 4, 
the second section 3 is not only removed from the separating projection 7 
by grasping to collapse the outer peripheral housing 2', but also the 
elastic flow stopping piece 2'" is removed from the projection 9 to 
interpose tube C between the first upper projection 2a and the first lower 
projection 2a' to accomplish the flow stopping state. 
In the fourth embodiment in FIG. 4, a first inner hole 5b of the hole 5 is 
formed in the bent portion of the elastic flow stopping piece 2"'. In FIG. 
5 a first intermediate inner hole 5d is formed in the projection 9, and a 
notched groove 10 is formed to place the tube C at the free end of the 
lower side of the outer peripheral housing 2'. 
A sixth embodiment in FIG. 6 is substantially the same as the fifth 
embodiment in FIG. 5, except that the outer peripheral housing 2' of the 
first section 2 is formed of lower and upper housings 2f and 2f' different 
from the fifth embodiment that integrated U-shape. A cutter 4 and first 
and second pressing strips 2e", 2e' are not only formed at the upper 
housing 2f' but a guide slot 11 is longitudinally formed at both front and 
rear sides of the cutter 4, and a shaft rod 12 projected from the front 
and rear wall surfaces of the lower housing 2f is inserted thereto. This 
shortens the separating distance of both the housings 2f and 2f' by 
grasping the outer peripheral housing 2' to flow stop and separate in the 
similar mode to that of the fifth embodiment in FIG. 5. 
A seventh embodiment in FIG. 7 is substantially similar to the fourth 
embodiment in FIG. 4 except that both are different in the construction of 
second section 3 and the separating portion. 
More specifically, the second section 3 is formed separately by bending an 
elastic strip. Thus, the second section 3 of the fourth embodiment in FIG. 
4 is a C-shape, while the second section 3 of seventh embodiment is formed 
of an upper annular intersection 3e and a lower holder 3f substantially in 
a figure eight. A first flow stopping portion 2b capable of stopping the 
flow through the interposed tube C is formed between the first left side 
projection 2a" and the first right side projection 2a"' forming the lower 
holder 3f, The upper annular intersection 3e of an elastic source forms a 
first holding portion 2d for holding the flow stopping state. 
In order to then form a separating portion, an L-shaped separating removing 
rod 13a, b is projected from the upper side of the outer peripheral 
housing 2', A lateral portion 13a of the lower end side is resisted 
against the elastic force of the lower holder 3f of the second section 3 
and is interposed between the first left side projection 2a" and the first 
right side projection 2a"'. In this case the both lower ends of the lower 
holder 3f are placed on placing projections 14, 14' projected from the 
lower end side of the outer peripheral housing 2' as shown in FIG. 7(b). 
In this case the longitudinal portion 13b of the separating removing rod 
13a, b is projected longitudinally including a first innermost side hole 
5e of the hole 5. 
Therefore, when the housing 2' is grasped to be collapsed similarly to the 
other embodiments, the rod 13a, b between the projections 14 and 14'" is 
removed from the lower holder 3f. Thus, the tube C is interposed between 
the first left side and the first right side projections 2a" and 2a"' to 
hold the flow stopping state. Thus, in the seventh embodiment in FIG. 7, 
the separating portion is formed of the second section 3 and the rod 13a, 
b detachably attached thereto in contact with one another. 
In an eighth embodiment in FIG. 8, first flow stopping portion 2b of a 
first section 2 and a second flow stopping portion 3b of a second section 
3 are different from the other embodiments. 
More particularly, the first and second upper projections 2a, 3a of the 
first and second sections 2, 3 are similar to the above embodiments. First 
and second lower projections 2a', 3a' are, when pressed, bendable by 
extending first and second elastic arms 2a, 3g. 
Therefore, according to this construction of the eighth embodiment in FIG. 
8, when the thickness of the tube C is relatively thin, the tube C and the 
separating thin film 6b of the separating portion 6 can be not only 
effectively cut and separated by the cutter 4 as described above. Even if 
the thickness of the tube C is large, when the tube C is pressed by the 
first and second upper projections 2a, 3a, the first and second elastic 
arms 2g, 3g of the first and second lower projections 2a', 3a' are 
bendable downwardly. Thus, the first and second flow stopping portions 2b, 
3b stop flow, and the first and second holding portions 2d, 3d can 
effectively hold to complete the cutting operation by the cutter 4. 
In a ninth embodiment in FIG. 9, the first lower projection 2a' is formed 
oppositely to the construction of the first and second flow stopping 
portions 2b, 3b is the eighth embodiment in FIG. 8. The first upper 
projection 2a is formed to be transformable as in FIG. 9(b) from the 
elongated state of FIG. 9(a). 
In other words, a bendable elastic portion 2h is bent of the intermediate 
position at the first upper projection 2a, and when a tube C of larger 
diameter is used as described above, the portion 2h is bent to be 
contracted. 
In the eighth embodiment in FIG. 8, the first and second sections 2, 3 are 
integrally formed, but in use, by grasping the first section 2, the second 
section 3 is pressed by the first section 2. And reference numeral 3e 
designates a pressing bearing strip projected at the second section 3 for 
pressing the first section 2. 
The fastening means of the cutter 4 is formed by a projection 4e projected 
from a mounting arm 4d connected to the outer peripheral frame 1c. The 
cutter 4, and the projection 4e are thermally calked. Numerals 1d, 1d" 
designate antiskid portions formed at the grasping position of the frame 
1c. 
In the embodiments described above, one side of the first and second upper 
projections 2a, 3a and the first and second lower projections 2a', 3a' are 
elastically transformable by a spring action. However, both sides may be 
formed to be all elastically transformable in a spring action. 
According to the embodiments described above by, even though the thickness 
of the tubes C may be irregular, flow in the tube may be sufficiently 
stopped. Therefore, one cutting and separating implement can be used 
universally for various conduits. Even if used for a constant size 
conduit, in case of manufacturing the cutting and separating implement of 
the invention, the range of the dimensional contraction at molding time 
can be increased during production, and the molds do not require severe 
dimensional accuracy. 
Since the invention is constructed as described above, the patient or 
worker can very simply manually operate by merely grasping the implement 
on the tube, thereby rapidly storing the flow in the tube and cutting the 
tube by the cutting and separating implement of the invention. As a 
result, the patient can be released without discharging blood or medicine 
without the assistance of a nurse or other person in an emergency 
situation. 
Since the implement of this invetion can be readily molded of synthetic 
resin, it can be color coded for identification.