PRESSURIZATION-TYPE DRUG INJECTOR HAVING DRUG EXPOSURE PREVENTIVE FUNCTION

Abstract

[Problem] The purpose of the present invention is to provide a portable anticancer agent container for preventing exposure and infection to the human body caused by chemical solution leakage that arises during a removal operation of a coupling connector at the time of system cleaning using a cleaning solution. [Solution] Provided is a pressurization-type drug injector having a drug exposure preventive function and having a system cleaning function, the pressurization-type drug injector comprising: a reservoir that has a chemical solution filling opening and a chemical solution discharging opening; a pressurization deformation means that undergoes pressurization and deformation by the injection of a chemical solution and that pushes out the chemical solution by a force caused by restoration of the pressurization and deformation; a flow rate control means that adjusts the flow rate of the chemical solution by resistance; a system cleaning port that includes a cleaning solution injection opening, a chemical solution filling opening, and a liquid discharging opening; and a case that contains therein said reservoir, said pressurization deformation means, and said system cleaning port. The case has openings respectively in the vicinity of the chemical solution filling opening, the system cleaning injection opening, and the chemical solution discharging opening. The chemical solution being filled is filled into the pressurization deformation means from the chemical solution filling opening of the reservoir, and moves from the chemical solution discharging opening of the reservoir to the exterior of the container via the flow rate control means. A cleaning solution is injected from the injection opening of the cleaning port arranged downstream from the flow rate control means, and moves to the exterior of the container. The pressurization-type drug injector having a drug exposure preventive function is characterized in that the periphery of the cleaning port is completely covered by a sterile seal, and thus, the cleaning port injection opening is kept clean until use.

Claims

1. A pressurized drug injector with an agent exposure prevention function comprising a system cleaning function, comprising; a reservoir having a drug solution loading inlet and a drug solution discharge outlet, pressurizing and deforming means in communication with the reservoir, wherein the pressurizing and deforming means which is pressurized and deformed by loading of a drug solution from the drug solution loading inlet and pushes out the drug solution from the drug solution discharge outlet by a restoration force against pressurization and deformation, a flow rate controlling pipe for adjusting a flow rate of the drug solution via resistance, a system cleaning port that is in communication with the flow rate controlling pipe at a location downstream of the flow rate controlling pipe and that has a detergent loading inlet for infusing a detergent and discharge outlet, and a case encasing the reservoir, the pressurizing and deforming means, the flow rate controlling pipe and the system cleaning port, wherein the case has an aperture in the vicinity of each of the drug solution loading inlet, the drug discharge outlet, and the detergent infusion inlet, wherein the drug solution infused from the drug solution loading inlet is loaded into the pressurizing and deforming means to pressurize and deform the pressurizing and deforming means, and is pushed out from the drug solution discharge outlet by a restoration pressure against pressurization and deformation, wherein a flow rate of the drug solution is adjusted by the flow rate controlling pipe, the drug solution passes through the system cleaning port with adjusted flow rate and moves from the discharge outlet outside of the pressurized drug injector.

2. (canceled)

3. The pressurized drug injector with an agent exposure prevention function of claim 1, wherein the drug solution infusion inlet and the detergent loading inlet have, on the inside, a screw hole that engages a tip of a syringe for introducing a drug solution or a detergent.

4. The pressurized drug injector with an agent exposure prevention function of claim 1, wherein an aperture in the vicinity of the detergent infusion inlet of the case is sealed with a detachable sealing member to ensure a sterilized state.

5. The pressurized drug injector with an agent exposure prevention function of claim 1, wherein a filter for suppressing passage of a particle with a size that is equal to or greater than a predetermined size is provided between the drug solution discharge outlet and the flow rate controlling pipe.

6. The pressurized drug injector with an agent exposure prevention function of claim 1, wherein the aperture in the vicinity of the detergent infusion inlet of the case is disposed away from a top part of the detergent infusion inlet.

7. The pressurized drug injector with an agent exposure prevention function of claim 6, wherein the drug solution infusion inlet and the detergent loading inlet have, on the inside, a screw hole that engages a tip of a syringe for introducing a drug solution or a detergent.

8. The pressurized drug injector with an agent exposure prevention function of claim 6, wherein an aperture in the vicinity of the detergent infusion inlet of the case is sealed with a detachable sealing member to ensure a sterilized state.

9. The pressurized drug injector with an agent exposure prevention function of claim 3, wherein an aperture in the vicinity of the detergent infusion inlet of the case is sealed with a detachable sealing member to ensure a sterilized state.

10. The pressurized drug injector with an agent exposure prevention function of claim 6, wherein a filter for suppressing passage of a particle with a size that is equal to or greater than a predetermined size is provided between the drug solution discharge outlet and the flow rate controlling pipe.

11. The pressurized drug injector with an agent exposure prevention function of claim 3, wherein a filter for suppressing passage of a particle with a size that is equal to or greater than a predetermined size is provided between the drug solution discharge outlet and the flow rate controlling pipe.

12. The pressurized drug injector with an agent exposure prevention function of claim 4, wherein a filter for suppressing passage of a particle with a size that is equal to or greater than a predetermined size is provided between the drug solution discharge outlet and the flow rate controlling pipe.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0030] FIG. 1 shows an exemplary schematic diagram of a flow channel for a drug solution in the pressurized drug injector with an agent exposure prevention function of the invention.

[0031] FIG. 2 shows another schematic diagram of a flow channel for a drug solution in the pressurized drug injector with an agent exposure prevention function of the invention.

[0032] FIG. 3 shows yet another schematic diagram of a flow channel for a drug solution in the pressurized drug injector with an agent exposure prevention function of the invention.

[0033] FIG. 4 shows a perspective view of an example of the pressurized drug injector with an agent exposure prevention function of the invention.

[0034] FIG. 5 shows a perspective view seen from the back side of FIG. 4.

[0035] FIG. 6(a) shows a cross-sectional perspective view of one side of the pressurized drug injector with an agent exposure prevention function cut at the A-A′ cross-section in FIG. 4, and FIG. 6(b) shows a cross-sectional perspective view of the other side of the pressurized drug injector with an agent exposure prevention function cut at the A-A′ cross-section in FIG. 4.

DESCRIPTION OF EMBODIMENTS

[0036] The pressurized drug injector with an agent exposure prevention function of the invention is described hereinafter with reference to the drawings.

[0037] FIGS. 1, 2, and 3 are exemplary schematic diagrams showing a flow channel for a drug solution and detergent of a specific configuration example (see FIGS. 4 to 6) of the pressurized drug injector with an agent exposure prevention function of the invention. A pressurized drug injector with an agent exposure prevention function is described in detail by using the schematic diagrams in FIGS. 1, 2, and 3. The name of each member is described in detail after describing the flow channel.

[0038] FIGS. 1(a) and (b), FIGS. 2(a) and (d), and FIG. 3 show an exemplary flow channel of a pressurized drug injector with an agent exposure prevention function 1, which are embodiments of the present invention shown in FIGS. 4 to 6. According to the flow channel in FIG. 1(a), a drug solution is loaded into a balloon 50 from a drug solution loading inlet of the pressurized drug injector with an agent exposure prevention function 1, then moves from a drug solution discharge outlet 8d of a reservoir 8 to a liquid transport filter 14 via a first tube (not shown), moves from the liquid transport filter 14 to a flow rate controlling pipe 11 via a second tube (not shown), moves from the flow rate controlling pipe 11 to a system cleaning port 12 having a detergent infusion inlet (not shown) for introducing a detergent via a third tube (not shown), and moves to a patient: CV port via a fourth tube (not shown). In this regard, if a flow rate controlling tube is used in place of the flow rate controlling pipe 11, the flow rate controlling tube can be used from the second tube to the third tube.

[0039] A flow rate controlling tube is a tube that adjusts the flow rate with friction from unevenness inside of the tube. The dosing rate of an agent can be adjusted to any value by adjusting the length to any value.

[0040] Meanwhile, when the flow rate controlling pipe 11 is used, maneuvering of a tube does not need to be considered, and members can be placed stably. Thus, useless space can be reduced to prepare a pressurized drug injector with an agent exposure prevention function 1 with excellent portability.

[0041] The pressurized drug injector with an agent exposure prevention function 1 of the invention is a configuration comprising the drug solution discharge outlet 8d to the tube downstream of the system cleaning port 12 within the flow channel described above as one unit. With such a configuration, system cleaning does not require a route switching operation for infusion a detergent, such as detaching the pressurized drug injector with an agent exposure prevention function 1 and a Huber needle or using another connection system, and is simple, so that exposure of the body of a user, etc. to a drug solution can be prevented.

[0042] The liquid transport filter 14 is integrated with the drug solution discharge outlet 8d in the flow channel of FIG. 1(b). In such a case, the first tube is no longer needed, while the second tube is directly communicative from the liquid transport filter 14 to the flow rate controlling pipe 11, and the drug solution moves from the fourth tube to a patient via a CV port. With such a configuration, the pressurized drug injector with an agent exposure prevention function 1 has a small unit size and light weight, so that the injector would have excellent portability.

[0043] If a flow rate controlling tube is used in place of the flow rate controlling pipe 11 in the flow channel of FIG. 1(b) in the same manner as the flow channel of FIG. 1(a), the flow rate controlling tube can be used from the second tube to the third tube.

[0044] A configuration that does not use the liquid transport filter 14 as shown in FIG. 2(a) may also be used. With such a configuration, the pressurized drug injector with an agent exposure prevention function 1 has a small unit size and light weight, so that the injector would have excellent portability. In the flow channel in FIG. 2(a), a drug solution moves from the drug solution discharge outlet 8d to the flow rate controlling pipe 11 via a first tube, moves from the flow rate controlling pipe 11 to the system cleaning port 12 having a detergent infusion inlet for introducing a detergent via a third tube, and moves from a fourth tube to a patient via a CV port. In this regard, if a flow rate controlling tube is used in place of the flow rate controlling pipe 11, the flow rate controlling tube can be used from the first tube to the third tube.

[0045] The drug solution discharge outlet 8d, the liquid transport filter 14, and the flow rate controlling pipe 11 are integrated in the channel of FIG. 2(b). The first tube and the second tube are no longer needed, while the third tube is directly communicative with the system cleaning port 12, and the drug solution moves to a patient: CV port via the fourth tube. With such a configuration, the pressurized drug injector with an agent exposure prevention function 1 has a small unit size and light weight, so that the injector would have excellent portability.

[0046] The drug solution discharge outlet 8d, the liquid transport filter 14, the flow rate controlling pipe 11, and the system cleaning port 12 are integrated in the channel of FIG. 3. The first tube, the second tube, and the third tube are no longer needed, and the drug solution moves to a patient: CV port via the fourth tube. With such a configuration, the pressurized drug injector with an agent exposure prevention function 1 has a small unit size and light weight, so that the injector would have an advantage of having excellent portability.

[0047] The pressurized drug injector with an agent exposure prevention function 1 employing the flow channel of FIGS. 1(b), 2(a), 2(b), or 3 can be considered as a configuration comprising at least from a drug solution loading inlet for loading a drug solution in a balloon to the drug solution discharge outlet 8d to the tube downstream of the system cleaning port 12 as one unit in the same manner as FIG. 1(a).

[0048] Specific configuration examples of the pressurized drug injector with an agent exposure prevention function 1 of the invention described above are now described using FIGS. 4 to 6.

[0049] FIGS. 4 and 5 are perspective views showing an example of the pressurized drug injector with an agent exposure prevention function 1 of the invention. FIG. 5 shows a rear view of FIG. 4 (far side of the drawing). The pressurized drug injector with an agent exposure prevention function 1 of the invention shown in FIGS. 4 and 5 is generally comprised of an exterior case 2, upper cover 4, reservoir 8, tube wrapping section 10, system cleaning port 12, and liquid transport filter 14, as well as the drug solution connecting pipe 8d and balloon 50 shown in FIG. 6.

[0050] The exterior case 2 is rectangular with the cross-section in z direction as illustrated having an r-shaped corner, and is formed in a shape that tapers from the lower end to the bottom surface. Thus, the exterior case as a whole has corners reduced to have a shape that is safe and does not get caught when placed in a pocket of a garment of a patient, etc. The upper cover 4 is rectangular with the cross-section in the z direction having an r-shaped corner just like the exterior case 2, and is formed to comprise a top panel and be opened downward, and is covered on and coupled to the upper part of the exterior case 2. A substantially flat top panel 6, which is the top part of the exterior case 2, is disposed between the exterior case 2 and the upper cover 4, and a gap (space) is provided between the exterior case 2 and the top panel 6 and between the upper cover 4 and the top panel 6.

[0051] A container consisting of the exterior case 2 and the upper cover 4 is formed with a light material such as resin and has excellent portability. An elastic material is used in the examples of FIGS. 4 to 6 in order to prevent breakage or damage from impact or external tension such as dropping.

[0052] On the top panel 6, the tube wrapping section 10, reservoir 8, and system cleaning port 12 are disposed substantially in series in the longitudinal direction of the top panel 6, which are disposed so that the top ends of the tube wrapping section 10, reservoir 8, and system cleaning port 12 would not interfere with the top panel of the upper cover 4. Substantially circular apertures 4a and 4b are provided on the top panel of the upper cover 4. The drug solution loading inlet 8a of the reservoir 8 and a system cleaning port inlet 12a of the system cleaning port 12 can fluidly connect to a medical syringe when introducing a drug solution and detergent. A substantially circular aperture 4c for allowing a tube to pass through for discharging a drug solution or detergent to the outside is provided on the side in the vicinity of the system cleaning port 12 of the upper cover 4.

[0053] With such a configuration, the pressurized drug injector with an agent exposure prevention function 1 can be readily stored in a pouch or bag, enables dosing while keeping the injector in a pocket of a garment, and can be readily transported by a patient. As described in detail below, a system cleaning port for introducing a detergent is inside the pressurized drug injector with an agent exposure prevention function 1. Thus, the pressurized drug injector with an agent exposure prevention function 1, a drug solution and detergent route switching operation for system cleaning or infusion is not required, so that cleaning can be performed while avoiding exposure or infection due to unexpected leakage.

[0054] The reservoir 8 is integrally formed with the drug solution connecting pipe 8d shown in FIG. 6 and penetrates through the top panel 6 of the exterior case 2. The drug solution loading inlet 8a is disposed on the top side of the top panel 6 of the reservoir 8, and the aperture 4a for connecting to the drug solution loading inlet 8a is formed on the upper cover 4.

[0055] Meanwhile, the drug solution connecting pipe 8d integrally formed with the lower reservoir 8 of the top panel 6 is disposed in a space between the exterior case 2 and the top panel 6, and the balloon 50 is mounted so as to cover the pipe.

[0056] The material is preferably resin, which has a certain level of elasticity to prevent the injector from being readily damaged upon dropping. When loading a drug solution, the drug solution (not shown) is infused into the drug solution connecting pipe 8d shown in FIG. 6 via the aperture 4a of the upper cover 4 and the drug solution loading inlet 8a from a syringe, etc. (not shown) which is manually handled by a medical practitioner or mechanically controlled. While not illustrated, a check valve 8c is disposed between the drug solution loading inlet 8a and a reservoir column, so that there is no reverse flow to the drug solution loading inlet. A dedicated screw plug (not shown) is installed in the drug solution loading inlet 8a.

[0057] Another example of the drug solution loading inlet 8a (not shown) includes a screw hole that engages with the tip of a medical syringe for introducing a drug solution into the balloon 50. The tip of a medical syringe having a screw lock is secured to the drug solution loading inlet 8a while rotating by threaded engagement, which enables suppression of a repulsive effect generated from resistance of a drug solution and prevention of separation of the drug solution loading inlet 8a and the medical syringe upon loading of the drug solution. This also enables stable loading of a drug solution.

[0058] For example, a detachable cap (not shown) is provided by threaded engagement at the aperture 4a of the upper cover 4. By removing the cap when introducing an agent and attaching the cap before and after introducing an agent, contamination of the aperture 4a before a drug solution loading operation can be prevented, contamination inside the pressurized drug injector with an agent exposure prevention function 1 during drug solution loading can be prevented, and an agent remaining at an aperture can be sealed off when detaching a medical syringe, etc. It is preferable that a cap is attached to the exterior case 2 or the upper cover 4 with a strap, etc. so that the cap would not be lost during use.

[0059] The structure of the reservoir 8 is further described with reference to FIG. 6. FIG. 6 shows a diagram from cutting FIG. 4 at the A-A′ cross-section (x-z cross section). FIG. 6(a) shows a diagram viewed from the near side of the drawing of FIG. 4, and FIG. 6(b) shows a diagram viewed from the far side of the drawing. From the top side, the drug solution loading inlet 8a, receiving section 8b, check valve 8c, drug solution connecting pipe 8d, and drug solution discharge channel 8e integrally form the reservoir 8 as show in FIG. 6. A medical practitioner connects the tip of a medical syringe, etc. to the drug solution loading inlet 8a, applies a positive pressure to allow a drug solution to pass through the check valve 8c, and loads the balloon 50 from the drug solution connecting pipe 8d connected to the balloon. A drug solution loaded into the balloon 50 is completely prevented from flowing in reverse to the drug solution loading inlet 8a by the check valve 8c, so that an agent can be sent out to the drug solution discharge outlet 8e.

[0060] The balloon 50 is disposed between the exterior case 2 and the top panel 6, covers the drug solution connecting pipe 8d of the reservoir 8, and is secured so that a loaded agent would not leak.

[0061] As the material of the balloon 50, resin rubber such as silicon rubber, which has drug and pressure resistance performance as well as elasticity, is used. When a drug solution is loaded into the balloon 50, the balloon is pressurized and deformed. The drug solution can be pushed upward by a restoration force from the pressure and deformation, whereby the drug solution is sent out to the drug solution discharge outlet 8e via the drug solution connecting pipe 8d.

[0062] The dotted line in FIG. 6 indicates an expanded state of the balloon 50 from loading a drug solution. The balloon 50 expands within the space in the exterior case 2. When the balloon contracts back to the original size, the enclosed drug solution is pushed upward of the balloon.

[0063] Besides balloons, a driving method such as a motor, air pressure, or spring may be used as the pressurizing/deforming means.

[0064] A first tube (not shown) is connected to the drug solution discharge outlet 8e and connected to an infusion inlet 14a of the liquid transport filter 14, and a flow rate controlling tube (not shown) is connected to the discharge outlet 14b of the liquid transport filter 14. Since 5 to 10 cm of flow rate controlling tube is required, the tube is wrapped around the substantially cylindrical tube wrapping section 10 without bending the tube and is connected to an infusion inlet 12c of the system cleaning port 12. A fourth tube is connected to a discharge outlet 12d of the system cleaning port 12, and the fourth tube extends out of the container from a drug solution discharge tube outlet 4C of the upper cover 4.

[0065] The tube wrapping section 10 preferably comprises a spiral and round groove on the outer circumference and is made of a light resin with elasticity to facilitate wrapping a flow rate controlling tube therearound and prevent the tube from collapsing or bending.

[0066] The liquid transport filter 14 is provided in the vicinity of the inside side surface in the longitudinal direction of the upper cover 4. As the shape thereof, a common shape is used. FIGS. 4 to 6 show a substantially circular shape. The liquid transport filter 14 filters a drug solution. It is preferable to use such a filter because contamination of a patient and occlusion of the flow rate controlling pipe 11 or flow rate controlling tube can be prevented when a loaded drug solution is contaminated with a foreign object, particles with a large diameter, or air.

[0067] Another example (not shown) of the configuration from the drug solution discharge outlet 8d to a port inlet 12b can be a configuration wherein the drug solution discharge outlet 8d and the port inlet 12b are communicative with the flow rate controlling pipe 11. With such a configuration, the drug solution discharge outlet 8d and the port inlet 12b can be connected directly with the flow rate controlling pipe 11 without a tube interposed therebetween. The required space would be smaller for the amount not used by a tube. Thus, the size of the entire pressurized drug injector with an agent exposure prevention function 1 can be further reduced. A flow rate controlling pipe in this regard refers to those that can control the flow rate by placing a resistive system such as unevenness or filter in the pipe. If the liquid transport filter 14 is equipped within a flow rate controlling pipe, contamination of a patient by a foreign object or particles with a large diameter is prevented while further reducing the size of the pressurized drug injector with an agent exposure prevention function 1.

[0068] As another example that is not illustrated, a detachable sealing member may be provided to the aperture 4b of the upper cover 4. A sealing member seals the aperture 4b to cover the aperture from the outside. A detergent introducing section 12a can be seen from the aperture 4b and aperture 4b by removing the sealing member upon introduction of a detergent. This configuration can prevent contamination around the detergent introducing section 12a and maintain the flush port 12 in a clean state until system cleaning. In addition to the aperture 4b, the detergent introducing section 12a, aperture 4b, and detergent introducing section 12a may be sealed with a sealing member. In addition to a sealing member, use of the aforementioned cap member is also contemplated as needed.

[0069] At the system cleaning port 12, the top part of the detergent introducing section 12a at the top end of the system cleaning port 12 is disposed away from the aperture 4b of the top panel of the upper cover 4 in the same manner as the reservoir 8 described above. This configuration can prevent a drug solution or detergent from leaking out of the pressurized drug injector with an agent exposure prevention function 1, even when mishandled upon introduction of the drug solution or detergent or when the aperture 4b faces the direction of the ground.

[0070] The upper cover 4 also increases the effect of alleviating direct impact on the reservoir 8 or system cleaning port 12.

[0071] The pressurized drug injector with an agent exposure prevention function 1 of the invention was described above by using FIGS. 4 to 6, but the design may be changed to be suitable for use in a medical setting. For example, the first tube may be connected to the flow rate controlling pipe 11 to eliminate the second tube by removing the filter 14 to improve portability. The filter 14 may also be provided integrally with the reservoir 8. The overall shape of the pressurized drug injector with an agent exposure prevention function 1 can also be more flat or elongated in accordance with the location where the injector is placed.

[0072] As yet another example, it is conceivable to make the injector more light weight and compact by providing the detergent introducing section 12a of the system cleaning port 12, for example, on the exterior case 2 and providing an aperture on the exterior case 2 to dispose the detergent introducing section 12a away from the drug solution loading inlet 8a. In addition, a method of disposing the system cleaning port 12 including the port inlet 12a within a substantially sealed space is contemplated in order to maintain the sanitary state of the port inlet 12a of the system cleaning port 12.

[0073] Conventional pressurized drug injectors with an agent exposure prevention function required switching of tube connection, etc. for infusing a detergent upon system cleaning and entailed risk of exposure to a drug solution or infection. The pressurized drug injector with an agent exposure prevention function 1 of the invention comprises the system cleaning port 12 in a substantially sealed space formed by the exterior case 2 and the upper cover 4 as described above. Such a configuration does not require switching of tube connection, etc., and enables loading of a drug solution and infusion of a detergent as a single unit encasing all of the tube, filter, etc. The tube wrapping section 10 allows any length of tube to be tightly disposed without damage in a certain space.

[0074] The pressurized drug injector with an agent exposure prevention function 1 of the invention was described above. The arrangement, shape, and size of members are those that are suitable for use of a drug and as a medical instrument and can be modified within a common scope to be compatible with rapidly advancing medicine.

TABLE-US-00001 Reference Signs List 2 exterior case 4 upper cover 6 top panel 8 reservoir 8d agent connecting pipe 10 tube wrapping section 12 system cleaning port 14 liquid transport filter 50 balloon