JP2000000303A - Additional injector for medicinal solution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an additional injector for medicinal solution that can be expected to attain positive sealing and improvement in the durability of a storage bag. SOLUTION: This additional injector is provided with a casing 1 and an operating cap 2 rotatably supported to the casing 1. A medicinal solution filling storage bag 3 with an upstream solution transport tube 4 and a downstream solution transport tube 5 connected thereto is disposed on the casing side. A plurality of protrusions are provided on the back face side of the operating cap 2, while a stopper 6 abutting one of the protrusions to seal the downstream solution transport tube 5 of the storage bag 3, and a pusher 7 abutting one of the protrusions to discharge the filled medicinal solution in the storage bag 3, are interposed between the casing 1 and the operating cap 2. A means for sealing the downstream solution transport tube 5, and a means for discharging the filled medicinal solution in the storage bag 3, therefore exist separately as the stopper 6 and the pusher 7 so as to make a great contribution to certainty of sealing and durability of the storage bag 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a self-regulating type used in combination with an apparatus for continuously administering a small amount of a drug such as an analgesic or an anticancer drug in order to alleviate postoperative pain or cancer pain in a patient. The present invention relates to improvement of a chemical liquid additional injector.

[0002]

2. Description of the Related Art As a conventional additional injector of this kind, there is one disclosed in Japanese Patent Application Laid-Open No. 5-15591. Although not shown in the drawing, the conventional additional drug solution injector rotatably supports a rod-shaped gripping rotating arm having rollers at both ends at a central portion of a casing attached to a patient's wrist via a band. On the other hand, a storage bag for filling a drug solution is arranged along the rotation trajectory of the gripping rotation arm on the inner peripheral side of the casing, and an upstream infusion tube and a downstream infusion tube are connected to both ends of the storage bag, respectively. ing.
The ends of these infusion tubes are connected in parallel to the injection line side of the above-mentioned continuous drug solution administration device.

[0003] Under the additional liquid injector used in combination with the continuous administration device, a sealed state of the storage bag on the downstream side is obtained by a roller, and from the injection line of the continuous administration device via the upstream infusion tube. A predetermined amount of the chemical is filled in the storage bag. However, usually, a small amount of drug solution is continuously administered to the patient from the continuous administration device, but if the patient feels sudden pain during the process, By rotating the gripping rotation arm described above, the sealed state of the storage bag on the downstream side of one roller is released, and the storage bag is gradually crushed by the other roller, so that the inside of the storage bag is filled. The medicinal solution being administered is administered to the patient from the downstream infusion tube via the infusion line of the continuous administration device, thereby making it possible to respond to an emergency.

[0004]

However, in the conventional additional liquid injector, when the storage bag is filled with the liquid medicine, the downstream side of the storage bag must be sealed. If such a sealed state is not ensured, the filled drug solution leaks to the downstream infusion tube side, so it is necessary to press the storage bag with a considerable force by the rollers of the gripping rotating arm. For this reason, under the conventional additional liquid injector, there is a sufficient possibility that the pressing force at the time of filling the liquid medicine and the pressing force for discharging the liquid medicine in the storage bag may significantly impair the durability of the storage bag.

[0005]

SUMMARY OF THE INVENTION The present invention has been developed in order to effectively solve the problems of the conventional additional liquid injector, and the invention according to claim 1 comprises a casing and the casing. An operation cap that is rotatably supported on the, a storage bag for medicinal solution filling that connects the upstream infusion tube and the downstream infusion tube to the casing side,
While providing a plurality of projections on the back side of the operation cap, a stopper that abuts one of the projections to seal the downstream infusion tube of the storage bag and abuts one of the projections between the casing and the operation cap. A configuration is employed in which a pusher for discharging the filled chemical solution in the storage bag is interposed.

According to a second aspect of the present invention, based on the first aspect, the gap between the raised wall of the casing and the operation cap in the rotation direction side of the operation cap which is close to the pusher is made smaller than the thickness of the pusher. A configuration in which a taper surface for pressing the pusher in a direction perpendicular to the rotation direction of itself is formed on a side surface of the projection provided on the back surface that contacts the pusher is adopted.

According to a third aspect of the present invention, based on the first aspect, the protrusions are provided at two opposing positions on the back surface of the operation cap, and the stopper is provided on the downstream side in the rotation direction of the operation cap adjacent to the storage bag. Positioned configuration was adopted.

According to a fourth aspect of the present invention, on the premise of the first aspect, each guide groove of the casing for guiding the upstream infusion tube and the downstream infusion tube of the storage bag extends from an arc shape to a linear shape. In this case, the outlet side of each guide groove is made closer.

Therefore, in the first aspect of the present invention,
Since the means for sealing the infusion tube downstream of the storage bag and the means for discharging the liquid medicine filled in the storage bag are separately provided as a stopper and a pusher, the sealing and the durability of the storage bag are greatly improved. In addition to contributing, the operation cap is rotated to operate the stopper and the pusher, so that there is almost no fear of malfunction as compared with the push button type.

According to the second aspect of the present invention, when the operation cap is rotated and the projection provided on the back surface is brought into contact with the pusher, first, the tapered surface of the projection corresponds to the pusher. Since the pusher pushes one end of the pusher downward in a direction perpendicular to the rotation direction of the operation cap while abutting against the edge and crushing a part of the storage bag, the pusher swings in an oblique posture, Next, when the end face of the projection comes into contact with the pusher, the pusher is pressed downward while maintaining the horizontal posture, whereby the storage bag is completely crushed, and the filled drug solution can be discharged to the downstream infusion tube side. . Therefore, there is no fear that the storage bag will inadvertently pulsate when the liquid medicine is discharged. Also, at this time, the gap between the raised wall of the casing in the rotation direction side of the operation cap close to the pusher and the operation cap is smaller than the thickness of the pusher, so that the pusher does not move accidentally.

According to the third aspect of the invention, by rotating the operation cap by 180 °, the unsealing of the downstream infusion tube by the stopper and the discharge of the filled drug solution of the storage bag by the pusher can be simultaneously obtained. This can contribute to downsizing of the additional drug solution injector itself while ensuring a sufficient storage bag capacity.

According to the fourth aspect of the present invention, since the guide groove of each infusion tube is formed to extend linearly from an arc shape and the exit side of each guide groove is made closer, each infusion tube is provided. The contact area of the infusion tube with respect to the guide groove is increased to ensure a reliable holding state of each infusion tube including the tensile strength, and the infusion tube is close to the infusion tube, so that the handling thereof is easy.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to a preferred embodiment which illustrates the present invention. An additional liquid injector according to this embodiment, as shown in FIG. A disk-shaped casing 1 mounted on a patient's wrist, a circular operation cap 2 rotatably supported by the casing 1, and an upstream infusion tube 4 and a downstream infusion tube 5 at both ends.
And a stopper 6 for sealing the downstream infusion tube 5 of the storage bag 3.
And an arc-shaped pusher 7 for forcibly discharging the filled chemical solution in the storage bag 3, a disc-shaped base plate 8 covering the bottom of the casing 1, and the operation cap 2 on the casing 1 side via the base plate 8. And a connecting pin 9 rotatably supported.

As shown in FIG. 2, the casing 1 is provided with an arc-shaped raised wall 10 projecting beyond a range of 180 ° in the circumferential direction, and a storage bag 3 is provided at a place where the raised wall 10 does not exist. A pair of guide grooves 12a and 12b for individually guiding the upstream infusion tube 4 and the downstream infusion tube 5 are formed on the bottom surface side of the raised wall 10 while defining a storage space 11 for the pusher 7 and the downstream infusion tube. The storage space 11 of the guide groove 12b for guiding
Mounting through hole 1 that supports stopper 6 at a position adjacent to
3 is formed. In addition, since the storage space 11 stores the storage bag 3 and the pusher 7 in a vertically overlapping manner, the storage space 11 is positively provided with a shape similar to each arc.

The guide grooves 12 of the infusion tubes 4 and 5 are also provided.
As shown in the drawing, each of the guide grooves 12a and 12b has a shape extending from a circular arc shape to a linear shape.
b, each infusion tube 4
The contact area of each of the infusion tubes 4 and 5 can be reliably held, including the tensile strength, by increasing the contact area of the infusion tubes 5 with the guide grooves 12a and 12b. Further, an operation cap 2 described later is provided at a predetermined location on the peripheral surface of the casing 1.
Is formed with one positioning concave portion 14 which engages with the convex portion of FIG.

As shown in FIG. 3, the operation cap 2 has an insertion hole 15 formed at the center thereof for inserting the connecting pin 9 and a pair of opposite surfaces having a smooth end face 16a and a tapered side face 16b at two opposite locations. Are formed, and a pair of protrusions 17 are formed at two opposing locations on the inner surface of the peripheral wall to engage with the recesses 14 for positioning, and a pair of knobs 18 are disposed at two opposing locations on the outer surface of the peripheral wall. Is formed.

The storage bag 3 is formed by welding the peripheral edges of two flexible sheet members. When the upstream infusion tube 4 and the downstream infusion tube 5 are connected to both ends thereof, As shown in FIG. 4, a hard joint thin tube 19 is used.
Are welded together with the inner end side of the storage bag 3 protruding inside the storage bag 3. Therefore, since the molten resin does not enter through the opening on the inner end side of the joint thin tube 19, a reliable connection between the infusion tubes 4 and 5 can be obtained.

As shown, the stopper 6 has bearing portions 13a of the mounting through holes 13 of the casing 1 on both sides of the front end.
A shaft 20 is formed so as to be rotatable and a pressing claw 21 is formed at the rear end. 2
The mounting through hole 1
When the operation cap 2 is rotated, when the corresponding smooth end surface 16a of the projection 16 abuts against the stopper 6 by rotation of the operation cap 2, the pressing claw 21 descends and crushes the downstream infusion tube 5; The downstream infusion tube 5 can be sealed. Also, the shaft portion 20 serving as the rotation fulcrum
Is located on the storage space 11 side, and is assembled so that the end on the side of the pressing claw 21 is lifted upward, so that the smooth end face 16 a of the projection 16 is securely contacted on the downstream side in the rotation direction of the operation cap 2. You will be able to contact.

As shown in the drawing, the pusher 7 is formed so that at least the lower surface thereof has a flat shape, and the notch for receiving the above-mentioned joint thin tube 19 and the infusion tubes 4.5 on the storage bag 3 side is formed at the center of both ends thereof. A part 22 is formed, and is configured to be stored in the storage space 11 of the casing 1 together with the storage bag 3.

The base plate 8 is formed of a transparent plate capable of confirming the presence or absence of air in the storage bag 3 and each of the infusion tubes 4 and 5, and as shown in FIG.
3a, the distal end of the connecting pin 9 inserted into the insertion hole 15 of the operation cap 2 is attached to the cylindrical portion 23 while the base plate 8 is applied to the bottom surface of the casing 1. 23, and the distal end of the connecting pin 9 is elastically locked to the inward flange 23a of the cylindrical portion 23.
The operation cap 2 and the base plate 8 are assembled to the casing 1 and, at the same time, the operation cap 2 is rotatably supported on the casing 1 side.

Therefore, in the additional liquid injector X according to the present embodiment, first, the storage bag 3 is placed in the casing while holding the upstream infusion tube 4 and the downstream infusion tube 5 in the respective guide grooves 12a and 12b. 1 and the base plate 8 is applied to the bottom of the casing 1, and then the stopper 6 is supported in the mounting through hole 13.
Next, the pusher 7 is stored in the storage space 11 above the storage bag 3, the operation cap 2 is fitted into the casing 1, and thereafter, the insertion hole 1 of the operation cap 2 is inserted.
If the connecting pin 9 is inserted from 5 and the tip of the connecting pin 9 is locked on the cylindrical portion 23 side of the base plate 8, the stopper 6 and the pusher 7 are interposed between the casing 1 and the operation cap, As shown in FIG. 5, the whole is immediately assembled.

In actual use, as shown in FIG. 6, male and female luer locks 24 and 25 and a flow control valve 26 are used.
And the like, and are connected to the injection line L of the continuous administration device Y in parallel and used for its use. Normally, as shown in FIG. Since the downstream infusion tube 5 is sealed by the pressing claw 21 of the stopper 6, a predetermined amount of the medicinal solution is stored in the storage bag 3 from the injection line L of the continuous administration device Y via the upstream infusion tube 4. Is filled.
The continuous administration device Y in the drawing is a balloon-type continuous infusion device.

Therefore, in such a state, the inflating of the storage bag 3 causes the pusher 7 to be pressed against the back side of the operation cap 2 in the storage space 11, but at this time, the pusher 7 comes close to the pusher 7. Since the gap between the raised wall 10 of the casing 1 on the operation cap rotation direction side and the operation cap 2 is smaller than the thickness of the pusher 7, a wrap area is formed between the raised wall 10 of the casing 1 and the pusher 7. There is no need to worry about accidentally falling out of the storage space 11 and moving.

Here, even if the administration from the continuous administration device Y is performed continuously, if the patient feels a sudden pain, the patient can use the recess 14 on the casing 1 side and the operation cap 2. When the operation cap 2 is rotated in a predetermined direction by releasing the positioning state of the projection 17 on the side, first, as shown in FIG.
Since the stopper 6 is separated from the stopper 6, the sealed state of the downstream infusion tube 5 is immediately released.

Then, as shown in FIG. 9, the tapered side surface 16b of the other projection 16 on the opposite side is moved to the operation cap 2 as shown in FIG.
Abutting against the corresponding edge of the pusher 7 pressed against the back side of the storage bag 3, while crushing a part of the storage bag 3, and moving the contact end of the pusher 7 downward in a direction perpendicular to the rotation direction of the operation cap 2. As a result, the pusher 7 swings in an oblique posture, and when the rotation of the operation cap 2 is further continued, the smooth end surface 16a of the projection 16 contacts the upper surface of the pusher 7 as shown in FIG. Since the pusher 7 is pressed downward while maintaining the horizontal posture, the storage bag 3 is completely crushed, and the filled liquid medicine is discharged to the downstream infusion tube 5 side. As a result, the reverse flow of the filling chemical solution in the storage bag 3 to the upstream side is effectively suppressed, and the medicinal solution is administered to the patient's vein or the like from the injection line L of the continuous administration device Y.

When the storage bag 3 is crushed by the pusher 7, the joint tube 19 and the infusion tubes 4 and 5 can be released by the cutout portion 22, so that the storage bag 3 can be uniformly spread over substantially the entire surface. And there is no danger of damaging the joint tubule 19 or the infusion tubes 4 and 5.

Then, when the operation cap 2 is rotated by 180 ° until the liquid medicine filling the storage bag 3 is completely discharged,
Another convex portion 17 on the operation cap 2 side engages with the concave portion 14 on the casing 1 side to position the operation cap 2 on the spot, but in such a state, the stopper 6 is again turned on. Since the downstream infusion tube 5 is pressed downward by the smooth end surface 16a of the corresponding protrusion 16 to seal the downstream infusion tube 5 with the pressing claw 21 and the storage bag 3 is released from the pressing state by the pusher 7, the subsequent infusion is performed. The storage bag 3 is refilled with a predetermined amount of the drug solution.

In the above-described embodiment, the pusher 7 has a lightened portion formed on the upper surface side and a cutout portion 22 formed at the center of both ends.
As shown in FIG. 1, if a tapered cut surface 7a is provided on the end surface of the projection 16 that is in contact with the tapered side surface 16b, smooth sliding with the tapered side surface 16b of the projection 16 can be ensured, and the tapered side surface 16b of the projection 16 To smooth end face 1
When switching to 6a, it is possible to switch smoothly, so that there is no fear of rattling or noise.

[0029]

As described above, according to the present invention, according to the first aspect of the present invention, the means for sealing the downstream infusion tube of the storage bag and the means for discharging the filled chemical solution in the storage bag are defined below. Since the stopper and the pusher are separately provided, it can greatly contribute to the improvement of the sealing reliability and the durability of the storage bag.In addition, since the operation cap is rotated to operate the stopper and the pusher, the push button is used. Compared to the system, there is almost no fear of malfunction.

According to the second aspect of the present invention, when the operation cap is rotated and the projection provided on the back surface is brought into contact with the pusher, first, the tapered surface of the projection comes into contact with the corresponding edge of the pusher. The pusher pushes one end of the pusher downward in a direction perpendicular to the rotation direction of the operation cap while crushing a part of the storage bag in contact with the storage bag. When the end face abuts against the pusher, the pusher is pressed downward while maintaining the horizontal posture, whereby the storage bag is completely crushed, and the filled drug solution can be discharged to the downstream infusion tube side. Therefore, there is no fear that the storage bag will inadvertently pulsate when the chemical solution is discharged. Also, at this time, the gap between the raised wall of the casing in the rotation direction side of the operation cap close to the pusher and the operation cap is smaller than the thickness of the pusher, so that the pusher does not move accidentally.

According to the third aspect of the present invention, the operation cap is set to 180
By rotating the stopper, the sealing of the downstream infusion tube by the stopper can be released and the filling solution of the storage bag can be discharged by the pusher at the same time. Can contribute to

According to a fourth aspect of the present invention, the guide groove of each infusion tube is formed so as to extend from an arc shape to a linear shape.
Since the outlet side of each guide groove is close to each other, the contact area of each infusion tube with the guide groove is lengthened to ensure a secure holding state of each infusion tube including the tensile strength, and each infusion tube is approached. The handling is also easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an additional drug solution injector according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a casing from the back side.

3A is a perspective view showing the operation cap from the back side, and FIG. 3B is a cross-sectional view taken along line AA of FIG. 3A.

FIG. 4 is a cross-sectional view showing a connection structure between a storage bag and each infusion tube.

FIG. 5 is a perspective view showing an entire assembled state.

FIG. 6 is an explanatory diagram illustrating a state in which the device is used in combination with a continuous administration device.

FIG. 7 is a sectional view of a main part showing a normal state of a stopper and a pusher.

FIG. 8 is a cross-sectional view of a main part showing a state where the sealing state of the downstream infusion tube by the stopper is released.

FIG. 9 is a cross-sectional view of a main part showing a state in which the pusher swings in an oblique posture while crushing a part of the storage bag.

FIG. 10 is a cross-sectional view of a main part showing a state where the pusher is pressed in a horizontal position and the storage bag is completely crushed.

FIG. 11 is a perspective view showing another example of the pusher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Operation cap 3 Storage bag 4 Upstream infusion tube 5 Downstream infusion tube 6 Stopper 7 Pusher 7a Taper cut surface of pusher 8 Base plate 9 Connecting pin 10 Raised wall 11 Storage space 12a Guide groove of upstream infusion tube 12b Downstream infusion tube Guide groove 13 Mounting through hole 14 Depression 16 Projection 16a Smooth end surface of projection 16b Tapered side surface (tapered surface) of projection 17 Projection 19 Joint narrow tube 20 Shaft of stopper 21 Pressing claw of stopper 22 Notch 23 Tube portion 23a Tube portion Inward flange B Band X Additional liquid injector Y Continuous administration device L Injection line of continuous administration device

Claims (4)

[Claims] 1. A storage bag for filling a drug solution, comprising a casing and an operation cap rotatably supported by the casing, wherein an upstream infusion tube and a downstream infusion tube are connected to the casing, and a back surface of the operation cap. While a plurality of protrusions are provided on the side, between the casing and the operation cap, a stopper that contacts one of the protrusions to seal the downstream infusion tube of the storage bag, A chemical liquid additional injector characterized by interposing a pusher for discharging a filling chemical liquid. 2. The method according to claim 1, wherein a gap between the raised wall of the casing on the operation cap rotation direction side close to the pusher and the operation cap is provided.
Make it smaller than the thickness of the pusher, and on the side that contacts the pusher of the projection provided on the back of the operation cap,
2. The liquid injector according to claim 1, wherein a tapered surface for pressing the pusher in a direction perpendicular to its own rotation direction is formed. 3. A projection is provided on a rear surface of the operation cap opposite to the projection.
2. The liquid injector according to claim 1, wherein the stopper is provided at a location, and the stopper is located downstream of the operation cap in the rotation direction adjacent to the storage bag. 4. A guide groove of a casing for guiding an upstream infusion tube and a downstream infusion tube of a storage bag,
2. The liquid injector according to claim 1, wherein each of the guide grooves is close to the outlet side in a form extending from the arc shape to the linear shape.