Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M39/22—Valves or arrangement of valves
  • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M39/10—Tube connectors; Tube couplings
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M39/10—Tube connectors; Tube couplings
  • A61M2039/1072—Tube connectors; Tube couplings with a septum present in the connector
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M39/22—Valves or arrangement of valves
  • A61M39/24—Check- or non-return valves
  • A61M2039/2433—Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc
  • A61M2039/2446—Flexible disc
  • A61M2039/246—Flexible disc being fixed along all or a part of its periphery
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
  • A61M39/22—Valves or arrangement of valves
  • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
  • A61M2039/263—Valves closing automatically on disconnecting the line and opening on reconnection thereof where the fluid space within the valve is decreasing upon disconnection

Definitions

• This disclosure relates to needleless connectors.
• a port is provided in the fluid circuit and the medicinal fluids are administered through the port.
• ports There are various types of ports that can be provided in fluid circuits, but the most widely used are needleless connectors, which communicate with the circuit when a male lure connector is inserted and close when it is removed. Ports that use needleless connectors eliminate the risk of needlestick injuries like puncture ports, and also eliminate the risk of mistakes caused by switching operations like when using three-way stopcocks, etc.
• a needleless connector that houses a collapsible valve inside is being considered, which deforms when a male lure connector is inserted and returns to its original shape when the connector is removed (see, for example, Patent Document 1).
• a flow path is formed inside the needleless connector, and when the valve returns to its original shape after removal, the flow path shrinks and the drug solution in the flow path is pushed out toward the tip, which is expected to reduce retraction.
• needleless connectors that house collapsible valves have problems with the narrowing of the internal flow path, which increases flow resistance, requiring high pressure to inject the drug solution and reducing the flow rate. This is particularly problematic when injecting the drug solution by natural drip, such as with an IV drip, as high pressure cannot be applied. Even when injecting the drug solution using a syringe, the increased resistance is a problem.
• the collapsible valve can create areas in the needleless connector where the liquid medicine can easily accumulate, and any liquid medicine that gets into these areas may continue to remain in the needleless connector.
• the collapsible valve is required to deform and move smoothly when the male connector is inserted and to return to its original shape smoothly when it is removed, it is desirable to provide a guide mechanism for the collapsible valve within the insertion port.
• a guide mechanism for the collapsible valve and a mechanism to prevent the slit valve from falling off must be provided in the insertion port, which can result in problems such as a larger diameter and height for the insertion port.
• the objective of this disclosure is to solve at least one of these problems while reducing the retraction of needleless connectors.
• the first aspect of the needleless connector disclosed herein comprises a cylindrical housing having an insertion port at one end into which a male connector is inserted, and a plunger valve accommodated in the housing, a flow path formed between the inner wall surface of the housing and the outer wall surface of the plunger valve, the plunger valve having a cylindrical wall portion, a head portion formed on the insertion port side of the cylindrical wall portion, and an intermediate portion formed between the head portion and the cylindrical wall portion, the plunger valve deforms by inserting the male connector into the insertion port so that the volume of the flow path expands, and returns to its original state by removing the male connector inserted into the insertion port so that the volume of the flow path decreases, the flow path has an upstream flow path formed at the position of the head, a downstream flow path formed at the position of the cylindrical wall portion, and an intermediate flow path connecting the upstream flow path and the downstream flow path, and the head portion has a notched groove whose radial depth gradually decreases from the top of the head toward the intermediate portion.
• the plunger valve restores its original shape and the volume of the flow path is reduced, so that the medicinal liquid or the like in the needleless connector is pushed out toward the tip side. This makes it possible to reduce the occurrence of retraction.
• the plunger valve since the plunger valve has a notch groove in the head whose radial depth gradually decreases from the top to the middle part, it is possible to maintain the volume of the flow path on the top side while keeping the flow path resistance low.
• the medicinal liquid or the like injected from the male connector inserted into the insertion port is quickly guided to the notch groove, which makes the flow of the medicinal liquid smoother and makes it less likely to stagnate.
• the notch groove can be designed so that its circumferential width gradually narrows from the top side toward the middle side. This configuration can reduce the flow resistance on the insertion port side while also reducing the dead volume.
• a second aspect of the needleless connector of the present disclosure comprises a cylindrical housing having an insertion port into one end of which a male connector is inserted, and a plunger valve accommodated in the housing, a flow path being formed between the inner wall surface of the housing and the outer wall surface of the plunger valve, the plunger valve having a cylindrical wall portion, a head portion formed on the insertion port side of the cylindrical wall portion, and an intermediate portion formed between the head portion and the cylindrical wall portion, the plunger valve deforms by inserting the male connector into the insertion port so that the volume of the flow path expands, and by removing the male connector inserted into the insertion port, the plunger valve returns to its original state so that the volume of the flow path decreases, and the flow path has a portion through which liquid flows in a circumferential direction.
• the second aspect of the needleless connector can reduce retraction and has a portion that actively guides the liquid in the circumferential direction, which reduces bias in the area through which the liquid flows and prevents the occurrence of pockets where liquid accumulates.
• the flow path has an upstream flow path formed at the head position, a downstream flow path formed at the tube wall position, and an intermediate flow path connecting the upstream flow path and the downstream flow path, and the upstream flow path and the downstream flow path can be offset in the circumferential direction.
• the head has a notched groove that serves as the upstream flow path
• the housing has a housing groove that serves as the downstream flow path in a portion facing the cylindrical wall portion
• the plunger valve can be accommodated in the housing so that the circumferential position of the notched groove and the circumferential position of the housing groove are offset from each other.
• the third aspect of the needleless connector comprises a cylindrical housing having an insertion port into one end of which a male connector is inserted, a plunger valve accommodated in the housing, and a slit valve that closes the opening of the insertion port.
• a flow path is formed between the inner wall surface of the housing and the outer wall surface of the plunger valve.
• the plunger valve has a cylindrical wall portion, a head portion formed closer to the insertion port than the cylindrical wall portion, and an intermediate portion formed between the head portion and the cylindrical wall portion. The plunger valve is deformed by inserting the male connector into the insertion port so that the volume of the flow path is expanded, and is restored by removing the male connector inserted into the insertion port so that the volume of the flow path is reduced.
• the slit valve has a central portion having a slit that closes the opening of the insertion port in an openable and closable manner, and a skirt-shaped portion formed on the outer periphery of the central portion and protruding toward the plunger valve than the central portion.
• the housing has an outer tube portion and an inner tube portion at the insertion port. The inner tube portion holds the skirt-shaped portion between the outer tube portion and the inner tube portion, and is located between the skirt-shaped portion and the head portion to guide the movement of the head.
• the inner tubular portion of the insertion port serves both as a mechanism for preventing the slit valve from falling off and as a guide mechanism for the plunger valve.
• the needleless connector disclosed herein can solve at least one of the various problems associated with conventional needleless connectors.
• FIG. 1 is a perspective view showing a needleless connector according to one embodiment.
• FIG. 2 is a cross-sectional view taken along line II-II of FIG.
• FIG. 3 is a cross-sectional view taken along line III-III in FIG.
• FIG. 4 is a cross-sectional view of the connector shown in FIG. 2 with the male connector inserted.
• FIG. 5 is a cross-sectional view of FIG. 3 showing a state in which the male connector has been inserted.
• FIG. 6 is a side view showing a plunger valve.
• FIG. 7 is a cross-sectional view showing a plunger valve.
• FIG. 8 is a top view showing a plunger valve.
• the needleless connector has a cylindrical housing 103 and a plunger valve 101 housed in the housing 103.
• An insertion port 131 into which a male connector is inserted is formed in the upper part of the housing, and an outlet port 132, which is also a male connector, is formed in the lower part.
• the insertion port 131 is closed by a slit valve 106 so that it can be opened and closed.
• the insertion port 131 side is described as the upper side.
• the plunger valve 101 has a head 111, a cylindrical wall portion 113, and an intermediate portion 112 formed between the head 111 and the cylindrical wall portion 113.
• the outer diameter of the head 111 is smaller than the outer diameter of the cylindrical wall portion 113, and the intermediate portion 112 has a gently curved surface that is convex upward and connects the head 111 and the cylindrical wall portion 113.
• the plunger valve 101 is roughly bell-shaped with an open lower end, and has a hollow portion 122 that extends from the lower end of the cylindrical wall portion 113 to the bottom of the head 111.
• the upper portion of the head 111 is solid, and a notched groove 151 is formed in the outer surface of the head 111.
• the notched groove 151 is an inclined groove whose radial depth D gradually decreases from the top of the upper end of the head 111 toward the middle portion 112.
• the plunger valve 101 is accommodated in an accommodation space formed in the housing 103, and the accommodation space has a shape that is approximately the same as the outer shape of the undeformed plunger valve 101.
• the upper part of the accommodation space is an insertion port 131 into which a male connector is inserted.
• a housing groove 153 extending in the vertical direction is formed in a portion of the inner wall of the housing 103 that faces the cylindrical wall portion 113.
• a support wall 176 that stands upward is formed circumferentially at the lower end of the accommodation space of the housing 103. The lower part of the cylindrical wall portion 113 is sandwiched between the inner wall of the accommodation space and the support wall 176.
• the male connector 201 presses the head 111 of the plunger valve 101 downward.
• the plunger valve 101 is made of an elastic material such as rubber or elastomer, and is deformed when pressed.
• the hollow middle section 112 is significantly deformed so as to be folded into the inner cavity 122, but the solid upper section of the head 111 and the lower section of the tube wall section 113 sandwiched between the support wall 176 are hardly deformed.
• the head portion 111 moves downward, and an intermediate space 152 is formed between the outer surface of the intermediate portion 112 and the inner surface of the accommodation space, extending in the circumferential direction.
• the intermediate space 152 connects the notched groove 151 formed in the head portion 111 to the housing groove 153. This opens a plunger portion flow path between the plunger valve 101 and the housing 103, with the notched groove 151 as the upstream flow path, the intermediate space 152 as the intermediate flow path, and the housing groove 153 as the downstream flow path.
• the lower end of the housing groove 153 is connected to a housing lower flow passage 157 having a radial flow passage 155 extending toward the center of the housing 103 and an axial flow passage 156 passing through the outlet port 132, which is a male connector. Therefore, a flow passage that connects the insertion port 131 to the outlet port 132 is formed by the plunger portion flow passage and the housing lower flow passage 157.
• the plunger valve 101 When the male connector 201 is pulled out of the insertion port 131, the plunger valve 101 returns to its original shape. This causes the intermediate space 152 to shrink. This reduces the volume of the plunger flow path and pushes the liquid in the flow path out of the outlet port 132, making it difficult for liquid to be drawn in when the insertion port 131 is pulled out. Note that when the male connector 201 is not inserted into the insertion port 131, the intermediate part 112 of the plunger valve 101 and the inner wall surface of the storage space do not need to be in complete contact with each other to be liquid-tight, but a configuration in which they are liquid-tight is also possible.
• the notch groove 151 which is the upstream flow passage, is an inclined groove in which the radial depth D gradually decreases from the apex toward the middle portion 112. Therefore, the volume of the upstream flow passage, particularly near the apex that contacts the male connector 201, can be increased and the flow passage resistance can be reduced, compared to when the upstream flow passage is formed by a groove of constant depth along the surface of the head 111.
• the inclined groove with a substantially triangular cross section has a smaller overall volume than a groove with a substantially square cross section with a constant radial depth D, but the flow of liquid flowing downward from the male connector 201 can be directed radially without bending, so that the increase in pressure loss can be suppressed.
• the radial depth D of the notch groove 151 becomes shallower toward the middle portion 112 (downward), but the middle portion 112 forms an intermediate space 152, and the lower end of the notch groove 151 is integrated with the intermediate space 151, so the flow passage resistance does not increase significantly. Furthermore, compared to when a groove with a roughly rectangular cross section is formed, the strength of the head 111 is maintained and it is less likely to be crushed.
• the notched groove 151 is preferably formed so that the circumferential width W1 on the top side is greater than the circumferential width W2 on the middle portion 112 side, and the circumferential width narrows without any steps. This allows the liquid flowing through the notched groove 151 to be accelerated and flow more smoothly into the middle space 152, which is the middle flow path. It is also preferable that the side and bottom surfaces of the notched groove 151 are connected in a way that does not create sharp corners. By smoothly connecting the side and bottom surfaces, stagnation is less likely to occur.
• two notch grooves 151 are formed, extending from the center of the head 111 toward the outer edge and offset by 180° in the circumferential direction.
• the two notch grooves 151 ensure the flow rate and suppress the decrease in strength of the head 111, making it difficult for the head 111 to deform when the male connector 201 is inserted. Also, being offset by 180° makes it difficult for the liquid flow to become biased.
• the notch grooves 151 When forming multiple notch grooves 151 extending from the center of the head 111 to the outer edge, it is preferable that the notch grooves 151 extend farther inward than the inner diameter range 211 of the male connector 201 as shown in FIG. 8. In this way, the opening at the tip of the male connector 201 is not blocked, allowing the liquid to flow out without resistance, and the flowing liquid flows directly into the notch grooves 151, allowing the liquid to flow more smoothly.
• the plunger valve 101 is accommodated in the housing 103 so that the circumferential position of the notch groove 151 and the circumferential position of the housing groove 153 are offset. Because the circumferential positions of the notch groove 151 and the housing groove 153 are offset, the intermediate space 152 functions as a flow path through which liquid flows circumferentially, rather than as a pool in which the liquid spreads circumferentially and stagnates. This makes the flow of liquid in the flow path smoother, making it less likely for stagnation to occur.
• the magnitude of the circumferential offset between the cutout grooves 151 and the housing grooves 153 can be determined according to the number of cutout grooves 151 and housing grooves 153.
• each offset by 180° it is preferable, although not particularly limited, to set the magnitude of the circumferential offset between the cutout grooves 151 and the housing grooves 153 to 45° or more and 135° or less, from the viewpoint of increasing the circumferential offset to a certain degree to reduce retention.
• the housing 103 has a protrusion 182 that protrudes radially outward, and the housing groove 153 is formed at the position of the protrusion 182.
• the wall thickness of the housing 103 can be made uniform at the position of the housing groove 153 to the same extent as other parts, ensuring that the strength of the housing 103 is not reduced.
• the occurrence of distortion during molding can be suppressed.
• a positioning protrusion 183 is formed in the housing 103 at a position 90° circumferentially offset from the protrusion 182 in which the housing groove 153 is formed.
• the housing 103 of this embodiment is formed by combining an insertion port housing 171, a central housing 172, and an outlet port housing 173.
• the outlet port housing 173 has a disk-shaped base portion 175, an outlet port 132 which is a male connector protruding from the base portion 175, and a coupler 177 which surrounds the outlet port 132.
• the central housing 172 is cylindrical and fits onto the base portion 175 of the outlet port housing 173, and the insertion port housing 171 is cylindrical and fits onto the upper end portion of the central housing 172.
• the base portion 175 of the outlet port housing 173 closes the opening at the lower end of the storage space formed by the central housing 172 and the insertion port housing 171.
• the base portion 175 has a cylindrical support wall 176 that protrudes upward.
• the lower end of the plunger valve 101 fits over the support wall 176 and is sandwiched between the outer surface of the support wall 176 and the inner surface of the central housing 172. This creates a liquid-tight state in which the liquid flowing through the flow path formed between the outer surface of the plunger valve 101 and the inner surface of the housing 103 does not enter the cavity 122 of the plunger valve 101.
• the base portion 175 has an air vent 178 that connects the cavity 122 of the plunger valve 101 to the outside of the housing 103.
• air in the cavity 122 is discharged through the air vent 178, and when the plunger valve 101 is restored, air flows into the cavity 122 through the air vent 178, allowing the plunger valve 101 to deform and restore smoothly.
• the shape and size of the air vent 178 are not particularly limited, and various configurations are possible.
• the air vent 178 opens between the outlet port 132 and the coupler 177, but it can also open outside the coupler 177.
• the insertion port housing 171 has an outer tube portion 171A and an inner tube portion 171B.
• a male thread 181 that screws into a coupler of a male connector is formed on the outer surface of the outer tube portion 171A.
• the outer tube portion 171A and the inner tube portion 171B function as a slit valve holder that holds the slit valve 106 that closes the opening of the insertion port 131.
• the slit valve 106 of this embodiment is formed of an elastic material such as rubber or elastomer, has a slit, and has a central portion 161 that closes the opening of the insertion port 131, and a skirt-shaped portion 162 that surrounds the central portion 161.
• the skirt-shaped portion 162 protrudes downward from the bottom surface of the central portion 161 and reaches the upper end of the central housing 172.
• a narrow portion is formed between the central portion 161 and the skirt-shaped portion 162.
• the upper end of the outer tube 171A is folded back in a U-shape to form an upper claw that protrudes downward, and the upper end of the inner tube is formed with a lower claw that protrudes upward.
• the upper and lower claws sandwich the narrow portion of the slit valve 106.
• the skirt-shaped portion of the slit valve 106 is sandwiched between the outer tube 171A and the inner tube 171B. Until the male lure penetrates the slit valve, the slit valve is deformed downward while being sandwiched between the male lure and the plunger valve, so a load is generated on the outer periphery. If the slit valve 106 is simply sandwiched and fixed from above and below, the load applied when inserting the male lure may cause the slit valve to fall inward from between the upper and lower claws.
• the slit valve 106 In order to prevent the slit valve 106 from falling off, it is common to make the portion outside the narrow portion into which it is pinched larger. However, if the diameter of the portion outside the narrow portion is made larger, the outer diameter of the insertion port 131 also becomes larger. Therefore, in this embodiment, the slit valve 106 is provided with a skirt-shaped portion 162 that extends downward, and the skirt-shaped portion 162 is sandwiched and fixed between the outer tube portion 171A and the inner tube portion 171B. This makes it possible to prevent the outer diameter of the insertion port 131 from becoming larger while making it difficult for the slit valve 106 to fall off. Furthermore, by making the inside of the inner tube portion 171B the moving area of the plunger valve, it is possible to prevent the valve from becoming larger in the height direction.
• the inner diameter of the inner tube portion 171B is approximately equal to the outer shape of the head 111 of the plunger valve 101. Therefore, when the head 111 is pressed by the male connector 201, it functions as a guide to move the head 111 downward while preventing deformation of the head 111. This allows the plunger valve 101 to deform smoothly. In addition, the head 111 is guided when the plunger valve 101 is restored to its original shape, allowing it to be restored smoothly.
• a slit valve having a skirt-shaped portion is used, but a configuration using a general disk-shaped slit valve is also possible. Also, a configuration is possible in which a plunger valve seals the opening of the insertion port so that it can be opened, without providing an independent slit valve.
• the radial flow passage 155 formed in the outlet port housing 173 and connecting the housing groove 153 and the axial flow passage 156 has a shape in which the diameter on the housing groove 153 side is larger than that on the axial flow passage 156 side, and the diameter gradually decreases toward the axial flow passage 156 side.
• the liquid flowing through the radial flow passage 156 is accelerated, so that the flow direction can be smoothly changed in the axial direction in the axial flow passage 156. Therefore, it is possible to make it difficult for stagnation to occur in the housing lower flow passage 157.
• two radial flow passages 156 are formed 180° apart in the circumferential direction.
• the liquid from the radial flow passages 156 on both sides collides with each other forcefully in the axial flow passage 156, so that the liquid flows through the axial flow passage 156 while being stirred.
• the number of radial flow passages 156 is not limited to two.
• the outflow port housing 173 has a coupler 177 with a female thread 184, but the coupler 177 may be formed as necessary, and the configuration may also be such that the coupler 177 is not formed. Also, while an example is shown in which the outflow port 132 is a male connector, the outflow port 132 is not limited to a male connector, and it may be a female connector or may be configured as being integrated with a tube, catheter, etc.
• the plunger valve 101 When the plunger valve 101 was housed in the housing 103, three types of samples were created in which the circumferential position of the notched groove 151 was shifted by 0°, 45°, and 90° from the housing groove 153, and the flow rate was evaluated for each sample.
• the width W1 of the upper end of the notched groove 151 was approximately 1.5 mm, and the depth D was approximately 2.5 mm.
• the flow rate was also evaluated for a sample in which four grooves were formed, each approximately 0.5 mm wide and approximately 0.5 mm deep.
• the flow rate was measured as follows. A constant water level tank with a hydrostatic head height of 1000 ⁇ 5mm and a flow rate of 525 ⁇ 25mL/min before connecting the sample was prepared in accordance with the standards for flow rate testing (JIS T3223: Sterilized indwelling needles for peripheral blood vessels, Annex F), and a male connector was connected to each sample, and the flow rate per minute was determined by weight measurement. Three samples of each type were prepared and measurements were taken three times each.
• the flow rate was 127 mL/min, when it was 45°, the flow rate was 124 mL/min, and when it was 90°, the flow rate was 125 mL/min.
• the flow rate was 60 mL/min.
• the retention was evaluated by the following method for three types of samples in which the circumferential position of the notched groove 151 was shifted by 0°, 45°, and 90° from the housing groove 153.
• a sample was created in which the housing 103 was made of a transparent material, and the flow path of the needleless connector was filled with water colored with red ink. Then, 2.5 mL of uncolored water was injected with a syringe, and the degree of coloring was visually observed. The injection with the syringe took about 10 seconds.
• the needleless connector disclosed herein can solve various problems associated with conventional needleless connectors and is useful in the medical field.

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• Health & Medical Sciences (AREA)
• Heart & Thoracic Surgery (AREA)
• Pulmonology (AREA)
• Engineering & Computer Science (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Hematology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

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Citations (4)

• 2023
  • 2023-11-10 JP JP2024560076A patent/JPWO2024111443A1/ja active Pending
  • 2023-11-10 WO PCT/JP2023/040632 patent/WO2024111443A1/ja not_active Ceased
  • 2023-11-10 EP EP23894452.4A patent/EP4623983A1/en active Pending

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