JPH0316682Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a connector for a catheter, and more specifically, the present invention is characterized by having at least one conduit path on the base for connecting to a syringe or the like. The present invention relates to a connector for a catheter.

(Prior Art) U.S. Patent Publication No. 1, patented on June 19, 1973.
No. 3,739,778 discloses a catheter connector similar to that to which the present invention is directed. The catheter connector disclosed in this patent publication is generally Y-shaped with first, second, and third ends. 2. A conduit is formed inside the third end, the first end and the second end are in a straight line, and the third end is in a straight line near the junction between the first end and the second end. are integrally connected from the diagonal direction. A trocar (catheter or cannula) is coupled to the first end in communication with the interior of the junction so as to extend opposite to the second end; A puncture needle extends from the second end.

On the other hand, the first, second, and third ends, including their joints, are made of chemical-resistant rubber, and a puncture needle normally passes through the joints in a sealed manner. If the puncture needle is pulled out from the second end, the third
A self-occluding septum is formed that communicates the conduit within the end with the interior of the trocar. Needless to say, this self-occluding septum is also made of rubber. According to this US patent, prior to actual use of the catheter connector, a puncture needle passes through a first end, a second end, and a trocar, while a catheter or injection needle is inserted into the third end. A needle is inserted into the interior of the joint. In this case, a holding cylinder is attached to the third end, and the catheter or injection needle is inserted into the holding cylinder with the tip of the catheter or injection needle facing the junction. Of course, the catheter or injection needle does not need to be inserted from the beginning, and may be inserted during actual use. In this case, the third end, together with the first and second ends, is made of rubber and is therefore self-occluding when no catheter or needle is inserted.

How to use it is to puncture a blood vessel with the tip of the puncture needle protruding from its tip. At that time, the trocar surrounding the puncture needle is also punctured into the hole formed by the puncture needle into the blood vessel. Whether the tip of the trocar has reached a predetermined location in the blood vessel can be determined by whether blood oozes out of the opening at the second end opposite the first end. If blood oozes out from the opening at the second end, remove the puncture needle and
The opening is then closed with a stopper. The trocar is then inserted, and at the same time, a medicinal solution is injected through the catheter or injection needle. In this way, the injected drug solution is delivered to the blood vessel via the trocar, which remains inserted into the blood vessel.

Further, US Pat. No. 3,915,168, which was issued as a patent on October 28, 1977, also discloses an I-shaped catheter connector in addition to the above-mentioned catheter connector. The I-shaped one is essentially a chemical-resistant rubber tube with a conduit formed inside, a trocar connected to one end, and a hub attached to the other end for connection to a catheter or injection needle. Consists of a sleeve. Normally, a catheter or puncture needle passes through the sleeve and the cannula or catheter, but when inserting a catheter or injection needle, the tip of the trocar is inserted into the blood vessel through the puncture needle, and then the trocar is inserted into the blood vessel through the puncture needle. After confirming that blood has oozed from the opening of the sleeve on the opposite side of the tube needle, remove the puncture needle, plug the opening, and then bend the sleeve into a dogleg shape when inserting a catheter or injection needle. let At the bend, the catheter or needle is inserted into the sleeve through the rubber wall forming the sleeve, thereby communicating with the trocar.

A catheter connector similar to the I-shaped one described above is disclosed in West German Patent Publication No.
It is also disclosed in No. 2238722.

In all of these conventional connectors, it is necessary to first penetrate the rubber wall in order to insert the catheter or needle into communication with the trocar. In this case, as the tip of the catheter or injection needle penetrates the wall, pieces of the rubber material that make up the wall may be scraped off, and these thin pieces of rubber may be fed directly into the blood vessel. It cannot be said that there is no possibility of it happening. In addition to the disadvantages mentioned above, once a piece of rubber material enters a catheter or needle, it not only clogs the trocar inserted into the blood vessel, but also causes the foreign material to become trapped in the blood vessel. There are problems such as getting inside. In particular, if a foreign substance invades a blood vessel, it may cause blood vessel occlusion or infection.

(Purpose of the invention) The present invention was created in view of the situation, and is easy to handle from a doctor's perspective, and
The object is to provide a catheter coupling for a self-retaining cannula kit for injection that is safe and does not lead to vascular embolism or infection from the patient's perspective. .

In order to achieve the above object, in a preferred embodiment of the present invention, when the puncture needle is withdrawn, the conduit is automatically occluded, and the conduit is closed so that the puncture needle cannot be reinserted once it has been withdrawn. The device is configured to lock the device. As the conduit of the puncture needle is automatically sealed and permanently occluded as described above, it is impossible to insert a previously withdrawn puncture needle or another puncture needle into the conduit within the base; There is no chance of accidental damage to the inserted trocar.

Furthermore, the occluding means is designed to prevent air bubbles, dust, etc. from entering the blood vessel, and therefore does not result in thrombus formation.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same parts are designated by the same reference numerals.

1 to 5 show a first embodiment of the present invention, in which reference numeral 1 indicates a catheter connector and 2 indicates its base. A linear conduit 3 is formed inside the base body 2 and extends from end to end. A trocar 7 is connected to the left end of the base body 2 and communicates with the conduit 3 . At the right end of the base body 2, which is opposite to the trocar 7, the tip of a hub 6a, which is generally fixed to one end of the puncture needle 6, is attached together with the puncture needle 6, as shown particularly clearly in FIG. A socket complementary in shape to the tip end of the hub 6a is formed to receive it. If the puncture needle 6 is inserted into the conduit 3 and the trocar 7 until the hub 6a is seated in the socket, the tip of the puncture needle 6 will be inserted into the trocar 7.
This protrusion, as well as the amount thereof, is known to those skilled in the art. 9 includes a pair of arm portions 9a and a fifth
As shown in the figure, the closure member is approximately U-shaped. This closing member 9 is mounted on the base body 2 with the arm portions 9a facing both sides of the base body 2, and is connected to the base body 2 by a support shaft 16 via the free end of the arm portion 9a. Therefore, the closing member 9 is pivotable between the retracted position shown in FIGS. 1 and 2 and the closed position shown in FIGS. 3 and 4. Also,
An elastic tongue is integrally formed at the free end of the arm 9a, so to speak, forming a leaf spring 8. This spring 8
The distal end of the closing member 9 engages with a locking pin provided on the base body 2, and acts to constantly urge the closing member 9 toward the retracted position.

Although the closing member 9 is biased in this manner by the spring 8, in reality, a protrusion 10 is integrally formed on the portion of the closing member 9 facing in the direction of movement to the closing position. Since the closing member 9 is in contact with the hub 6a of the puncture needle 6 inserted into the base body 2 as shown in FIGS. 1 and 2, the closing member 9 is always held in the retracted position.

As shown in FIGS. 2, 4, and 5, the closing member 9
is formed with an insertion passage that communicates in a straight line with the conduit 3 when it is moved to the closed position by the action of the spring 8. What is attached to and connected to the occlusion member 9 and is indicated by 9b is a conventionally known catheter insertion means,
This may be a syringe, a cannula or catheter connected to a source of medicinal fluid, as disclosed in the above-mentioned US Pat. No. 3,739,778, or it may be a holding barrel.

A locking member 11 is provided on the base body 2, with which a protrusion 10 comes into contact when the closing member 9 moves to the closing position as described later, and locking the closing member 9 in the closing position.
are integrally formed. Note that the closing member 9
As shown in FIGS. a, 4a and 5, it is sealed to the base body 2 via a conventional gasket, in particular a sealing ring 17. These seal rings serve to prevent outside air, dust, etc. from entering the blood vessels.

Moreover, if the closing member 9 moves to the closing position,
It is designed to be locked in its closed position,
The locking means for this purpose are particularly provided in Figures 2a and 4a.
This will be explained with reference to the figures.

A recess is formed in the part of the base body 2 in the vicinity of the locking member 11, in which a substantially U-shaped retaining pin 12, a locking pin 13 and a biasing spring 14 are accommodated. These retaining pins 1
2. The lock pin 13 and biasing spring 14 are usually
The lock pin 13 compresses the biasing spring 14 so that the tip of the lock pin 13 is completely accommodated in the recess, and the retaining pin 12 engages with the lock pin 13 with one end to maintain this state. That is, when the closing member 9 is in the retracted position, the lock pin 13 does not protrude from the right end surface of the base body 2, and the biasing spring 14 is held in a compressed state by the holding pin 12. However, if one end of the holding pin 12 and the lock pin 13 are disengaged, the lock pin 13
protrudes outward under the force of the biasing spring 14.

On the other hand, the other end of the holding pin 12 is connected to the closing member 9
The one facing the protrusion 10 is exposed from the surface of the locking member 11. Therefore, at the same time as or immediately before the projection 10 of the closing member 9 contacts the locking member 11, the projection 10 contacts the other end of the holding pin 12, so that the holding pin 12
Seen from the figure, it deviates downward. If the holding pin 12 is deflected downward in this manner, the one end of the holding pin 12 will be disengaged from the lock pin 13, and thus the lock pin 13 will protrude outward.

The tip of the protruding lock pin 13 is connected to the locking member 1
It enters the locking hole 15 formed in 1. When the tip of the locking pin 13 enters the locking hole 15 in this manner, the closing member 9, which has been rotated about the support shaft 16 to the closed position, is permanently locked in the closed position.

In the configuration according to the first embodiment described above, the catheter connector of the present invention has the following features as shown in FIG.
The closing member 9 is in the retracted position, and the puncture needle 6 is in the base body 2.
The conduit 3 and the trocar 7 are penetrated. At this time, the protrusion 10 of the closing member 9 is connected to the puncture needle 6.
The spring 8 makes it impossible to rotate from the retracted position to the closed position by the spring 8. When the catheter connector of the present invention is used in the same manner as disclosed in the above-mentioned US patent publication, when the puncture needle 6 is pulled out, the closing member 9 is moved to the closing position by the action of the spring 8. Rotate. This rotation ends when the protrusion 10 comes into contact with the locking member 11. At this time, as described above, since the protrusion 10 displaces the holding pin 12, the lock pin 13, which was held in the state in which the biasing spring 14 is compressed, protrudes due to the action of the biasing spring 14. Thus, when the closing member 9 reaches the closed position, the tip of the locking pin 13 enters the locking hole 15 to lock the closing member 9 in the closed position.

In addition, in order to prevent another cannula having a similar or identical configuration to the puncture needle 6 from being accidentally inserted when the closing member 9 is locked in the closed position, the length of the closing member 9 must be adjusted to a different length. or the closure member 9 may be provided with a loading cone that is incompatible with the cannula. If you do so, you will not be able to insert that other cannula, so there is no risk of it being accidentally inserted.

In the first embodiment shown in FIGS. 1 to 5, the spring 8 is integrally formed with the arm portion 9a, and the free end of the spring 8 is shown to be locked to a locking pin. As shown in FIG.
It may be constructed of a separate member from the arm 9a, with one end fixed to the support shaft 16 and the other end locked to a locking pin attached to the arm portion 9a. As far as the spring 8 is concerned, what is shown in FIG. 6 can be seen as a modification of the first embodiment described above, but as far as the locking means is concerned, it is the same as that used in the embodiments shown in FIGS. 7 and 7a. using means.

Although the closing member 9 has been described as having a substantially U-shape with a pair of arm portions 9a, it may be configured with a long arm portion and a short arm portion to have an L-shape.

7 and 7a, the base body 2 used in this second embodiment has a first, second and third conduit, instead of the straight conduit 3 in the first embodiment described above.
Three conduits are used. That is,
The conduit path formed in the base body 2 in the second embodiment has a substantially Y-shape. 7th and 7a
Although this Y-shaped conduit is not shown in the figure, it is almost the same as in the third and fourth embodiments described later.

Now, the first conduit line and the second conduit line in the second embodiment shown in FIG.
It constitutes a branch conduit line branching from the connection part with the conduit line. Along with this, ports are formed in the right end portion of the base body 2 to communicate with the second conduit path and the third conduit path, respectively. Seal rings 17 are fitted into these ports.

Furthermore, in the second embodiment, the catheter insertion means shown at 9b is not provided, but instead a catheter, cannula, syringe, etc. are directly inserted into the port of the third conduit. Accordingly, when the puncture needle 6 is inserted into the trocar 7 via the second conduit path and the first conduit path, the closing member 9 is connected to the third conduit path, that is, the branch conduit path. The communicating port is closed, but when the puncture needle 6 is pulled out, it rotates to the closed position by the action of the spring 8, releases the port to the third conduit, and closes the port to the second conduit. do. The locking means used in this second embodiment consists of a spring bolt 18 seated in a recess formed on the inner surface of the arm portion 9a of the closing member 9, and a spring bolt 18 seated on the side surface of the base body 2, as shown in FIG. 7a. When the closing member 9 is rotated to the closed position, the spring bolt 18 engages with the locking hole 15, thereby locking the closing member 9 in the closed position. It is supposed to be done.
If the locking method using the spring bolt 18 is used, there are advantages such as there is no need to use a special locking member on the base body 2, and there is no need to provide the protrusion 10 on the closing member 9 as in the first embodiment. .

Incidentally, also in this second embodiment, the spring 8 is
It may also be the one shown in FIG. 3 or the one shown in FIG. However, in the illustrated example, the spring 8 is interposed between the arm portion 9a of the closing member 9 and the base body 2, and one end is connected to the support shaft 16.
The other end is fixed to the arm portion 9a and attached to the base body 2.
It engages with a locking portion 16a guided by a slot 16b formed on the side surface of the holder.

In the third embodiment shown in FIG. 8, similarly to the embodiment shown in FIG.
a, 3b, and 3c. As described above, the first conduit 3a and the second conduit 3b communicate in a straight line, and the third conduit 3c constitutes a branched conduit. Further, in this embodiment, the closing member 19
Until the cannula (not shown), that is, the puncture needle, is inserted, the trochanter 21 is
is captured by the action of a compression spring 23 disposed in the hole 22 in a state where it is fitted into the locking hole 20 . However, when the canyule is inserted into the conduit 3b,
The structure is such that the pressing force applied from the cannula upon insertion acts on the dog 24 attached to the closing member 19, thereby releasing the closing member 19 from the locked state. There, the stabbing ended,
When the cannula is pulled out from the conduit 3c, the closing member 19 released from the locked state is released from the spring 2.
5, it jumps to the position shown by the solid line, and is thus locked in the closed position with the trochanter 21 fitted into the locking hole 26. In this way, the conduit 3b is permanently closed so that the cannula is never inserted again, but apart from this closing effect, the closing member 19
Since it itself constitutes the wall of the conduit 3c, it is possible, for example, to insert a catheter into such a conduit 3c.

Figures 9, 9a and 9b show the fourth embodiment of the present invention.
An example is shown. In this fourth embodiment, a substantially L-shaped sliding member 27 constitutes a closing member for the conduit paths 3c and 3b. This sliding member 27 is pivotable about a support shaft 28, and is biased by a biasing spring 29 to rotate to the closed position. Therefore, as shown in FIG. 9a, by forming an insertion hole 27a in the sliding member at the same level as the conduit path 3a, that is, so as to coincide with the conduit path 3a, this insertion hole 27a can be used. A puncture needle can be inserted. That is, normally, the puncture needle passes through the second conduit 3b, the first conduit 3a, and the trocar 7 through the insertion hole 27a, and slides against the biasing spring 29. The member 27 is held in the retracted position. Therefore, as explained in the first embodiment, when the puncture needle is pulled out, the sliding member 27 is rotated to the closed position as shown in FIG. 9a by the action of the biasing spring 29, and thus, for example,
It is locked in the closed position by the action of an expandable leaf spring 30 attached to the inner end of the sliding member 27 and in contact with the undercut portion 31 of the base body 2. When the sliding member 27 is thus rotated to the closed position or is locked in the closed position, the heel portion of the sliding member 27, indicated by 27b, is connected to the locking member formed on the base body 2. 9b on 11
They abut as shown by the dotted lines in the figure.

In this embodiment as well, the sliding member 27 is sealed by the annular seal 17.

In the fifth embodiment shown in FIGS. 10, 10a, and 10b, the aforementioned closing member is constituted by a rotary disk 40 having a hole 41 at a location eccentric to the rotation axis. In FIG. 10, since the helical spring 42 is stretched between the rotating shaft and the rotating disk 40, the rotating disk 40, that is, the closing member is the closing member indicated by 9 in FIG. 7a. Although the direction of movement is different, they work in almost the same way. That is, the puncture needle 6 is inserted through the hole 41, and therefore, when the rotary disk 40 is in the retracted position as shown in FIG.
When it is pulled out, the rotary disk 40 is rotated in the direction of the arrow 43 by the action of the helical spring 42, that is, to the closed position. At this time, the pin 45 biased by the spring 44
0 as shown in FIG. 10b.
6 to reliably lock the rotary disk 40 in the closed position. In this way, the insertion path for the puncture needle 6 is permanently blocked. Therefore, various drawbacks seen in conventionally known examples can be eliminated.

The catheter connector according to the present invention having the above-mentioned configuration has the following advantages compared to conventionally known connectors. That is, since the closing member is ready for use at any time, the operation is not only simple but also quick. Furthermore, when switching from injection work to catheter work, air bubbles or fine dust do not enter the blood vessel. Puncture needle once used for puncture,
In other words, it is possible to eliminate erroneous operations such as accidentally inserting a catheter.

In the embodiments shown in FIGS. 1 to 6, the occlusion member 9 includes a catheter insertion means 9.
Although shown as being provided with an opening for connecting the base body 2, such an opening is not necessarily necessary as long as the conduit provided in the base body 2 has an approximately Y-shape as a whole.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view of a catheter connector according to a first embodiment of the present invention, with a cannula inserted therein; FIG. 2 is a longitudinal sectional view of FIG. 1; Figure 2a is an enlarged detailed view of the lock suspension shown in Figure 2, Figures 3, 4 and 4a.
The figures correspond to Figures 1, 2 and 2a, respectively, but show the catheter coupling when the interocclusion member is moved to the occlusion position, and Figure 5 corresponds to Figures 3 to 4. 6 is a perspective view showing a modification of the first embodiment of the present invention, and FIG. 7 is a sectional view of the second embodiment of the present invention.
FIG. 7a is an enlarged detailed view of the locking means used in the catheter connector shown in FIGS. 6 and 7; FIG. , FIG. 8 is a longitudinal sectional view of a catheter coupling according to a third embodiment of the present invention, FIG. 9 is a longitudinal sectional view of a catheter coupling according to a fourth embodiment of the present invention, and FIG. 9a is a longitudinal sectional view of a catheter coupling according to a fourth embodiment of the present invention. FIG. 9b is a longitudinal cross-sectional view showing a state in which the closing member of the catheter coupling device according to the fourth embodiment is locked, and is an enlarged detailed view of a part of the constituent elements of the locking mechanism used in the fourth embodiment; FIG. 10 is a perspective view showing the catheter connector according to the fifth embodiment together with a puncture needle, and FIG. 10a is a perspective view showing the catheter connector shown in FIG. 10 in a locked state. , and FIG. 10b is a partially cutaway longitudinal sectional view showing the locking means. 2... Base body, 3, 3a, 3b, 3c... Conduit path, 7... Trocar, 8, 29... Biasing spring, 9,
19... Closing member, 10... Protrusion, 11... Locking member, 13... Lock pin, 15... Locking hole, 1
6... Support shaft, 17... Seal member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A base body for connecting with a syringe, catheter, etc. and through which a puncture cannula is inserted, and in which at least one conduit path is formed;
In order to prevent the puncture cannula from being reinserted into the conduit, there is provided a blocking means that blocks the conduit when the puncture cannula that has already been inserted is once removed; A coupling device for a catheter, comprising automatic locking means for locking the conduit in the occluded state. (2) A connector for a catheter as described in item (1) of the scope of utility model registration, characterized in that the base constitutes a support for the occluding means. (3) Scope of Utility Model Registration A catheter described in paragraph (1), characterized in that the occluding means is provided with a catheter connecting means for connecting a syringe, a catheter, etc. Connector for use. (4) Scope of Utility Model Registration The blocking means is one described in any of paragraphs (1) to (3), and the closing means is
The closure member has a bifurcated arm and is pivotably attached to the base body using the arm, and a spring member is provided on one of the bifurcated arms for closure. A connector for a catheter, characterized in that the means is movable. (5) Scope of Utility Model Registration Item (4), wherein the locking means includes a locking pin biased by a spring and a holding means for the locking pin, and the closing member is locked. When the locking pin is pivoted to a state where the holding means holds the locking pin, the locking pin is deflected by the action of the spring from the position where the holding means holds the locking pin, and the locking pin is fitted into a locking hole formed in the closing member, and the locking member is A connector for a catheter, characterized in that the connector is configured to lock. (6) Scope of Utility Model Registration Item (4) or (5), wherein a protrusion and a locking member are respectively formed on the closing member and the base, and Biasing spring means are provided for biasing the member relative to the base body, and after the cannula is withdrawn, the closure member is biased until the protrusion abuts the locking material under the action of the biasing spring means. A connector for a catheter, characterized in that the connector is configured to deflect. (7) Scope of Utility Model Registration Paragraph (1), wherein the closing means integrally connects an arm and a biasing spring member concealed between the arm and the base body. and a closing member pivotally attached to the base body, the biasing spring member being connected to a support shaft of the closing member on the one hand, and a locking member on the other hand. A connector for a catheter, characterized in that the connector is engaged with a member. (8) Scope of Utility Model Registration Item (7), wherein the locking means is mounted on the closing member and is biased to engage with a corresponding locking hole provided in the base body. A connector for a catheter, characterized in that it is movable. (9) Scope of Utility Model Registration As described in paragraph (1), the blocking means closes the conduit to a first position substantially parallel to the conduit before puncturing the conduit. a closure member displaceable between the closure member and a second position; releasable locking means for retaining the closure member in the first position; and means for releasing the releasable locking member after withdrawal of the cannula. When the releasable locking means is released, the closing member is displaced to the second position to close the conduit, and at the same time, as long as it is locked in the second position, another A connector for a catheter, characterized in that it constitutes a wall of a conduit. (10) Scope of Utility Model Registration Item (1), wherein the closing means is comprised of a substantially L-shaped pivotable closing member having a long arm portion and a short arm portion; The long arm is pivotally connected to the base body, and the short arm has an expandable arm at its free end that engages an undercut portion of the base body when pivoted to a locked position. A connector for a catheter, characterized in that it is provided with at least one leaf spring. (11) Scope of Utility Model Registration Paragraph (1), wherein the closing means is a rotating disc-shaped closing member having a cannula insertion hole at a position eccentric to the rotational axis; releasable locking means for retaining said closure member in an open position; means for releasing said releasable locking means when a cannula is inserted into said conduit; and means for moving said closure member from an open position to a closed and locked position. A connector for a catheter, comprising a spring member for rotationally driving the catheter. (12) Scope of utility model registration from paragraphs (4) and (7) to
A connector for a catheter according to any one of item (11), characterized in that an annular elastic seal member is provided in the gap between the base body and the closure member. (13) Scope of Utility Model Registration Item (1), wherein the blocking means has a first position displaced from the entrance of the conduit, and a second position where it blocks the entrance of the conduit. a closing member configured to be movable between the cannula and the distal end of the cannula inserted therein protrudes from the distal end of the conduit only when in the first position; A catheter connection comprising: a means for moving the occluding member from the first position to the second position; and a locking means for locking the occluding member in the second position. Ingredients. (14) Scope of Utility Model Registration Item (13), wherein a branch pipe is provided in the pipe line, and when the closing member is in the first position, the entrance of the branch pipe is closed. A connector for a catheter, characterized in that the connector is released when the connector is moved to the second position. (15) Scope of Utility Model Registration A catheter connection described in paragraph (13) or (14), characterized in that the closing member is pivotally connected to the base body. Ingredients. (16) A connector for a catheter, which is described in item (13) of the scope of utility model registration, and is characterized in that the closure member is provided with a through hole for receiving a catheter. (17) Scope of Utility Model Registration Item (14), wherein the closing member is provided within the base and is engaged with a recess within the base, and A connector for a catheter, wherein the closure member is configured and positioned to define a partition between the conduit passage and the branch conduit when the closure member is in the second position.