Liquid medicine feeding device

Abstract

A liquid medicine administration device (10) is provided with: a catheter (16); a needle member (18) having an inner needle (36) and a needle holding section (38); a holder (20) that holds the base end of the catheter (16); an adhesive body (24); the release sheet (28) has an extension part (70) that extends further toward the base end than the adhesive body (24). When the needle holding portion (38) and the extension portion (70) are viewed from the holder (20) toward the adhesive body (24), at least a portion of the needle holding portion (38) overlaps the extension portion (70).

Description

Technical Field

[0001] The present invention relates to a device for administering liquid. Background Art

[0002] Conventionally, there is a known device for administering a desired amount of liquid medicine to a living body at an appropriate time (see, for example, Japanese Patent Publication No. 2013-500793). The device has a needle for puncturing the living body and is attached to the body surface via an adhesive.

[0003] In a drug delivery device, it is desired to stably place a catheter. Summary of the Invention

[0004] An object of the present invention is to solve the above-mentioned problems.

[0005] (1) A liquid administration device according to one embodiment of the present invention comprises: a catheter having a catheter body placed in a living body; a needle component having an inner needle inserted into the catheter and a needle holding portion holding the base end of the inner needle and detachably mounted relative to the catheter; a retainer holding the base end of the catheter; an adhesive body having an adhesive surface to be adhered to the body surface of the living body and a surface opposite to the adhesive surface, a portion of the surface being coupled to the retainer; and a peeling sheet overlapping the adhesive surface in a manner covering the adhesive body and capable of being peeled off from the adhesive surface, the peeling sheet having an extension portion extending in a base end direction relative to the adhesive body, and at least a portion of the needle holding portion overlapping the extension portion when the needle holding portion and the extension portion are viewed from the retainer toward the adhesive body.

[0006] After the multiple needles consisting of a catheter and an inner needle are punctured into the body, if the retainer (sticker) is attached to the body surface before the inner needle is pulled out from the catheter, wrinkles may form on the sticker during the inner needle removal operation, causing it to become insufficiently attached to the body surface. If the sticker is not attached to the body surface sufficiently, there is a possibility that the sticker will peel off from the body surface and the catheter will fall off from the organism. According to the present invention, when observing the needle holding portion and the extension portion from the retainer toward the sticker, at least a portion of the needle holding portion overlaps with the extension portion. Therefore, before the user attaches the sticker to the body surface, it is easier to visually confirm the needle holding portion than the extension portion of the peeling sheet. As a result, it is difficult for the user to attach the sticker to the body surface before the inner needle is pulled out from the catheter. As a result, by attaching the sticker to the body surface after the inner needle is pulled out from the catheter, the catheter can be stably placed.

[0007] (2) In the liquid drug delivery device described in the above item (1), the adhesive body may be configured such that the adhesive body includes: a first adhesive portion having a first adhesive surface, and a second adhesive portion having a second adhesive surface, the first adhesive portion extending at least above the catheter body, and a portion of the surface opposite to the second adhesive surface in the second adhesive portion is coupled to the retainer, and the peel-off sheet includes: a first sheet covering the first adhesive surface, and a second sheet covering the second adhesive surface, the second sheet having the extending portion.

[0008] With this structure, after the multiple needles are punctured into the body, the first adhesive portion is attached to the body surface, thereby maintaining the distal end of the catheter inserted into the body. This makes it easier to subsequently fix the holder to the body surface using the second adhesive portion.

[0009] (3) In the liquid medication device described in the above item (2), the second sheet may include a covering portion covering the second adhesive surface, and an operating portion folded back from the front end of the covering portion toward the base end, wherein the operating portion includes the extending portion.

[0010] With this configuration, since the second sheet is folded back at the front end of the second adhesive surface, the second sheet can be easily peeled off by pulling the extended portion toward the base end.

[0011] (4) In the medication solution device according to the above item (2), the second sheet may have a curved slit and be formed in a spiral shape along the slit.

[0012] With this configuration, the second sheet can be easily peeled off from the adhered body by pulling the extended portion toward the base end.

[0013] (5) Based on the liquid administration device described in any one of the above items (1) to (4), it can also be constructed as follows: the catheter has a catheter seat that holds the base end of the catheter body, and the retainer has: a base portion, which is formed in a flat plate shape, for fixing the adhesive body; and a seat holding portion, which is formed in a cylindrical shape, at least the front end of which is connected to the base portion, for the front end of the catheter seat to be inserted into and hold the front end of the catheter seat, and the seat holding portion holds the catheter seat in a manner such that the axis of the catheter seat is inclined relative to the base portion.

[0014] With this structure, since the catheter is inclined relative to the body surface, the catheter can be placed in the living body more stably.

[0015] (6) In the liquid medication device according to any one of the above items (1) to (5), the liquid medication device may be formed with a coupling portion that releasably couples the needle holding portion and the extending portion.

[0016] With this structure, the retainer cannot be attached to the body surface unless the connection of the connection portion is released. Therefore, it is easier to avoid the retainer being attached to the body surface before the inner needle is pulled out.

[0017] According to the present invention, when the needle-retaining portion and the extension portion are viewed from the retainer toward the adhesive body, at least a portion of the needle-retaining portion overlaps with the extension portion. Therefore, before attaching the adhesive body to the body surface, the user can visually identify the needle-retaining portion more easily than the extension portion of the release sheet. This makes it difficult for the user to attach the adhesive body to the body surface before removing the inner needle from the catheter. Consequently, by attaching the adhesive body to the body surface after removing the inner needle from the catheter, the catheter can be stably placed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the liquid medication device according to the embodiment of the present invention.

[0019] Figure 2 It is a cross-sectional view of the needle unit of the liquid medication device.

[0020] Figure 3 It is a partial side view of the needle unit.

[0021] Figure 4 This is a perspective view of the needle unit as viewed from the peeling sheet side.

[0022] Figure 5 This is a diagram of a needle unit according to a modified example viewed from the peeling sheet side. DETAILED DESCRIPTION

[0023] Figure 1 The drug delivery device 10 of the present embodiment is configured to be placed on a patient's (organism's) body surface, such as the abdomen, and automatically administer a drug solution into the body. The drug delivery device 10 is used, for example, to administer a drug solution to a patient at a predetermined time after medical treatment, or to administer a drug solution gradually over time. Examples of drugs administered by the drug delivery device 10 include liquid pharmaceuticals such as antibody drugs, anticancer agents, chemotherapeutic agents, anesthetics, antibiotics, insulin, blood preparations, and nutritional supplements.

[0024] The drug delivery device 10 includes a needle unit 12 and a device body 14. The needle unit 12 is placed on the body surface or inside the body (subcutaneously) and serves as a portion for introducing a drug solution into the living body. The needle unit 12 includes a catheter 16, a needle member 18 inserted into the catheter 16, a holder 20 for holding the catheter 16, an adhesive member 24 coupled to the holder 20, and a release sheet 28 superimposed on the adhesive member 24.

[0025] like Figure 2As shown, the catheter 16 includes a catheter body 30 placed in the living body and a catheter hub 32 for holding the base end of the catheter body 30. Figure 2 The illustration of the adhesive body 24 and the peeling sheet 28 is omitted. The catheter body 30 is a flexible tubular body made of, for example, a resin material. An inner cavity for circulating a drug solution is formed inside the catheter body 30.

[0026] Catheter hub 32 includes a hollow cylindrical hub body 321 and a hollow cylindrical side port 322 that protrudes obliquely from the side of hub body 321. Catheter hub 32 is made of, for example, a resin material and is harder than catheter body 30. The proximal end of catheter body 30 is fixed to the distal end of hub body 321. A valve body 34 made of an elastic body is disposed within hub body 321, closer to the proximal end than the distal end opening of side port 322. Side port 322 protrudes obliquely toward the proximal end from the intermediate portion between the distal end and proximal end of hub body 321.

[0027] The needle assembly 18 includes an inner needle 36 that is inserted into the catheter 16, and a needle holder 38 that holds the proximal end of the inner needle 36. The needle assembly 18 is detachably mounted on the catheter 16. In the initial state of the needle unit 12, the distal end of the inner needle 36, including the needle tip 361, protrudes from the distal end opening of the catheter body 30. The catheter body 30 and the inner needle 36 overlap to form a multi-needle 40. The proximal end of the inner needle 36 is fixed to the needle holder 38. In the initial state, the inner needle 36 penetrates the valve body 34. In the initial state, the portion of the multi-needle 40 that protrudes distally from the catheter hub 32 is covered by a tubular protector 42.

[0028] The needle holding portion 38 is detachably connected to the catheter hub 32. Specifically, the needle holding portion 38 includes a base portion 381 that holds the base end portion of the inner needle 36, and a pair of engaging arms 382 provided on the side surfaces of the base portion 381. The claw portion 383 provided at the front end of each engaging arm 382 engages with a protrusion 323 provided at the base end portion of the hub body 321. The user presses the base end side of the engaging arm 382 inward, thereby displacing the front end side of the engaging arm 382 outward, and the needle holding portion 38 can be detached from the catheter hub 32. In addition, a gripping member 46 (see FIG. 4 ) to be gripped by the user is fixed to the base end portion of the needle holding portion 38 (base portion 381). Figure 1 ).

[0029] like Figure 1 As shown, the holder 20 holds the proximal end portion (catheter hub 32) of the catheter 16. The holder 20 includes a seat portion 50 and a seat holding portion 52. The seat portion 50 is formed in a flat plate shape. The adhesive body 24 is fixed to the seat portion 50.

[0030] The seat retaining portion 52 is formed in a cylindrical shape, with at least the distal end connected to the pedestal portion 50. The distal end of the catheter hub 32 is inserted into the seat retaining portion 52. The seat retaining portion 52 retains the distal end of the catheter hub 32. In this embodiment, the seat retaining portion 52 includes a first retaining portion 521 into which the distal end of the seat body 321 of the catheter hub 32 is inserted, and a second retaining portion 522 into which the side port 322 of the catheter hub 32 is inserted.

[0031] like Figure 3 As shown, the seat holding portion 52 protrudes from the surface 501 of the base portion 50. The seat holding portion 52 holds the catheter hub 32 so that the axis AX of the catheter hub 32 (specifically, the axis AX of the hub body 321) is inclined relative to the base portion 50. The axis AX of the catheter hub 32 is inclined toward the distal end so as to approach the adhesive body 24. In the initial state, the multiple needle 40 (see FIG. 1 ) held by the catheter hub 32 Figure 1 ) is also inclined relative to the base portion 50.

[0032] The sticking body 24 is a sheet-like component having a sticking surface 56 (adhesive surface) to be stuck to the body surface of a living body. One surface of the sticking body 24 serves as the sticking surface 56. A portion of the surface 24a opposite to the sticking surface 56 is joined to the holder 20 (base portion 50). Figure 1 As shown, when viewing the needle unit 12 from above, the adhesive body 24 is larger than the retainer 20. Therefore, the adhesive body 24 extends over its entire circumference and extends outward from the outer periphery of the retainer 20. The multiple needles 40 and the protector 42 extend through an opening 58 formed in the adhesive body 24. Furthermore, a transparent film-like dressing 60 is provided on the distal end of the surface 24a of the adhesive body 24. The multiple needles 40 and the protector 42 extend through the dressing 60.

[0033] The sticking body 24 includes a first sticking portion 241 having a first sticking surface 561 and a second sticking portion 242 having a second sticking surface 562. The distal end of the sticking surface 56 of the sticking body 24 is the first sticking surface 561. The portion of the sticking surface 56 adjacent to the proximal end of the first sticking surface 561 is the second sticking surface 562. The first sticking portion 241 extends at least above the catheter body 30. Within the second sticking portion 242, a portion of the surface 242a opposite the second sticking surface 562 is joined to the retainer 20.

[0034] like Figure 4As shown, the peeling sheet 28 overlaps the pasting surface 56 in a manner covering the pasting body 24. The peeling sheet 28 can be peeled off from the pasting surface 56. The peeling sheet 28 has: a first sheet 281 covering the first pasting surface 561, and a second sheet 282 covering the second pasting surface 562. Protrusions 62 protruding from the pasting body 24 are provided at both ends in the width direction of the first sheet 281. The user can pinch the protrusions 62 to peel the first sheet 281 off the pasting body 24. In addition, with respect to the needle unit 12 (and its components), the "width direction" refers to a direction orthogonal to the axial direction of the catheter 16 and the thickness direction of the pasting body 24 ( Figure 4 In addition, "width" refers to the dimension along the width direction.

[0035] The second sheet 282 includes an extension portion 70 that extends proximally from the attachment body 24. Specifically, the second sheet 282 includes a covering portion 64 that covers the second attachment surface 562, and an operating portion 66 that is folded back from the distal end of the covering portion 64 toward the proximally. The width of the operating portion 66 at the proximally end is smaller than the width of the distal end. The operating portion 66 includes an extension portion 70. The extension portion 70 extends proximally from the widthwise center of the proximally end portion of the attachment body 24.

[0036] like Figure 1 As shown, in the direction from the retainer 20 toward the sticking body 24 ( Figure 3 When the needle holding portion 38 and the extension portion 70 are observed in the direction A in the figure, at least a portion of the needle holding portion 38 overlaps with the extension portion 70. That is, when the base portion 50 of the holder 20 is in a horizontal position with the holder 20 on the upper side and the adhesive body 24 on the lower side, the extension portion 70 is arranged below at least a portion of the needle holding portion 38. The width of the extension portion 70 may be larger than the width of the needle holding portion 38 (including the width of a pair of engaging arms 382), smaller than it, or the same as it (in the example shown in the figure, the width of the extension portion 70 is slightly larger than the width of the needle holding portion 38). The width of the extension portion 70 is, for example, 50% to 150% relative to the width of the needle holding portion 38. In addition, as Figure 1 Like the extension portion 70 indicated by the imaginary line, the extension portion 70 may have a width twice or more as large as that of the needle holding portion 38 .

[0037] The needle unit 12 further includes a tube 74 and a connector 76. The tube 74 is flexible. One end of the tube 74 is connected to and fixed to the side port 322 of the catheter hub 32. The connector 76 is connected to and fixed to the other end of the tube 74.

[0038] In the initial state of the needle unit 12, the adapter part 80 is detachably connected to the base end of the connector part 76. A pre-filled liquid delivery device (for example, a syringe, etc.) not shown in the figure can be connected to the base end of the adapter part 80. The adapter part 80 has a pair of connecting arms 82. The claw portion 84 provided at the front end of each connecting arm 82 engages with the side portion of the connector part 76. The user presses the base end side of the connecting arm 82 inward, thereby displacing the front end side of the connecting arm 82 outward, and the adapter part 80 can be detached from the connector part 76. The connector part 76 in the state in which the adapter part 80 is detached can be connected to the device body 14.

[0039] The device body 14 is a device for supplying liquid medicine toward the needle unit 12. Although not shown in detail, the device body 14 includes a liquid medicine container containing liquid medicine; a sealing gasket slidably disposed within the liquid medicine container; a moving mechanism that moves the sealing gasket toward the distal end to deliver the liquid medicine from the liquid medicine container; a control unit that controls the moving mechanism; and a power supply unit that supplies power to the moving mechanism, etc. The device body 14 also includes a connecting portion 141 that can be connected to the connector portion 76 of the needle unit 12.

[0040] The medication solution administration device 10 is used as follows.

[0041] The user connects a priming liquid delivery device (not shown) to adapter member 80 to deliver the priming liquid, thereby filling tube 74 and the interior of catheter hub 32 with the priming liquid (first priming).

[0042] Next, the user removes the protector 42 from the multiple needles 40 and inserts the multiple needles 40 into the body. Next, the user grasps the protrusion 62 of the first sheet 281, peels off the first sheet 281 from the first adhesive portion 241 of the adhesive body 24, and adheres the first adhesive surface 561 to the body surface.

[0043] Next, the user removes the inner needle 36 from the catheter 16. Specifically, the user operates the pair of engagement arms 382 of the needle holder 38 to disengage the engagement arms 382 from the catheter hub 32, and pulls the needle member 18 (the inner needle 36 and the needle holder 38) toward the proximal end relative to the catheter 16, thereby removing the inner needle 36 from the catheter 16.

[0044] Next, the user grasps the extension portion 70 of the second sheet 282, peels off the second sheet 282 from the second adhesive portion 242 of the adhesive body 24, and sticks the second adhesive surface 562 to the body surface. Specifically, the user pulls the extension portion 70 toward the base end in order to peel off the second sheet 282 from the second adhesive portion 242. When the extension portion 70 is pulled toward the base end, the covering portion 64 (see FIG. 5 ) of the second sheet 282 is pulled away. Figure 4) is peeled off from the front end side while being turned over in sequence toward the base end direction, and finally the entire covering portion 64 of the second sheet 282 is peeled off from the second sticking portion 242. The user can peel off the second sheet 282 while sticking the second sticking surface 562 to the body surface.

[0045] Next, the user performs a second priming by delivering the priming liquid using a priming liquid delivery device (not shown). In the second priming, the catheter body 30 is filled with the priming liquid.

[0046] Next, the user connects the needle unit 12 to the device body 14 by connecting the connector portion 76 to the device body 14. Specifically, the user operates the pair of connecting arms 82 of the adapter member 80 to release the engagement between the connecting arms 82 and the connector portion 76, and then removes the adapter member 80 from the connector portion 76. Next, the user connects the connector portion 76, with the adapter member 80 removed, to the connecting portion 141 of the device body 14.

[0047] Next, the user presses a power switch (not shown) provided on device body 14. This activates device body 14. Device body 14 then dispenses the drug solution, automatically administering it to the patient via tube 74 and catheter 16. Furthermore, device body 14 is also provided with an adhesive member (not shown), and device body 14 is also attached to the body surface via the adhesive member.

[0048] This embodiment has the following effects.

[0049] Unlike the above-described steps, if the retainer 20 (sticking member 24) is affixed to the body surface after puncturing the multiple needles 40 consisting of the catheter 16 and the inner needle 36 and before removing the inner needle 36 from the catheter 16, wrinkles may form on the sticking member 24 during the removal of the inner needle 36, resulting in insufficient adhesion to the body surface. If the sticking member 24 is insufficiently adhered to the body surface, there is a possibility that the sticking member 24 may peel off from the body surface and the catheter 16 may fall off the body. According to this embodiment, when the needle retaining portion 38 and the extension portion 70 are viewed from the retainer 20 toward the sticking member 24, at least a portion of the needle retaining portion 38 overlaps with the extension portion 70. Therefore, before attaching the sticking member 24 to the body surface, the user can more easily visually confirm the needle retaining portion 38 than the extension portion 70 of the peeling sheet 28. Therefore, it is difficult for the user to attach the sticking member 24 to the body surface before removing the inner needle 36 from the catheter 16. As a result, by sticking the sticking body 24 to the body surface after the inner needle 36 is pulled out from the catheter 16 , the catheter 16 can be stably placed.

[0050] like Figure 4As shown, the adhesive body 24 includes a first adhesive portion 241 having a first adhesive surface 561 and a second adhesive portion 242 having a second adhesive surface 562. The release sheet 28 includes a first sheet 281 covering the first adhesive surface 561 and a second sheet 282 covering the second adhesive surface 562. The second sheet 282 includes an extension portion 70. With this structure, after the multiple needles 40 are inserted into the body, the first adhesive portion 241 is adhered to the body surface. This allows the distal end portion of the catheter 16 to remain inserted into the body, making it easier to subsequently secure the retainer 20 to the body surface using the second adhesive portion 242.

[0051] The second sheet 282 includes a covering portion 64 that covers the second adhesive surface 562, and an operating portion 66 that is folded back from the front end of the covering portion 64 toward the proximal end, and the operating portion 66 includes an extension portion 70. With this structure, since the second sheet 282 is folded back at the front end of the second adhesive surface 562, the second sheet 282 can be easily peeled off by pulling the extension portion 70 toward the proximal end.

[0052] like Figure 3 As shown, holder 20 includes a pedestal portion 50 that secures adhesive body 24, and a seat retaining portion 52 into which the distal end of catheter hub 32 is inserted and into which the distal end of catheter hub 32 is retained. Seat retaining portion 52 retains catheter hub 32 such that axis AX of catheter hub 32 is tilted relative to pedestal portion 50. This structure allows catheter 16 to be more stably placed in the living body because it is tilted relative to the body surface.

[0053] In addition, if Figure 3 As shown by the phantom line in the middle, a connecting portion 78 may be formed to releasably connect the needle retaining portion 38 and the extension portion 70. Examples of connecting means for connecting portion 78 include adhesive bonding and welding. Without releasing connecting portion 78, retainer 20 cannot be attached to the body surface. Therefore, providing connecting portion 78 makes it easier to prevent retainer 20 from attaching to the body surface before removing inner needle 36.

[0054] exist Figure 5 In the needle unit 12A of the modified example shown, the second piece 282A has a curved slit 285. The second piece 282A is formed into a spiral shape along the curved slit 285. One end portion of the outer peripheral side of the spiral shape in the second piece 282A protrudes toward the base end direction from the adhesive body 24, forming an extension portion 70A. Figure 1 The needle unit 12 shown in FIG. Figure 5In the needle unit 12A shown, when the needle holding portion 38 and the extension portion 70A are viewed from the holder 20 toward the adhered body 24, at least a portion of the needle holding portion 38 overlaps with the extension portion 70A. Thus, even when the second sheet 282A is formed in a spiral shape, the second sheet 282A can be easily peeled off from the adhered body 24 by pulling the extension portion 70A toward the base end.

[0055] In addition, the present invention is not limited to the above disclosure, and various structures can be adopted without departing from the gist of the present invention.

Claims

1. A liquid medication device, characterized in that: have: A catheter having a catheter body placed in a living body; a needle member having an inner needle inserted into the catheter and a needle holding portion holding a base end portion of the inner needle, and detachably attached to the catheter; a holder that holds the proximal end portion of the catheter; An adhesive body having an adhesive surface to be attached to a body surface of a living body and a surface opposite to the adhesive surface, a portion of the surface being coupled to the retainer; and a peeling sheet that overlaps the adhesive surface so as to cover the adhesive body and can be peeled off from the adhesive surface; The peeling sheet has an extension portion extending in a proximal direction relative to the sticking body. When the needle holding portion and the extending portion are viewed in a direction from the holder toward the adhered body, at least a portion of the needle holding portion overlaps with the extending portion.

2. The liquid medication device according to claim 1, wherein: The adhesive body includes: a first adhesive portion having a first adhesive surface, and a second adhesive portion having a second adhesive surface. The first adhesive portion extends at least above the catheter body. In the second attachment portion, a portion of the surface opposite to the second attachment surface is bonded to the retainer. The release sheet includes a first sheet covering the first adhesive surface and a second sheet covering the second adhesive surface. The second sheet has the extension portion.

3. The liquid medication device according to claim 2, characterized in that: The second sheet includes a covering portion covering the second adhesive surface and an operating portion folded back from the front end toward the base end of the covering portion. The operating portion includes the extending portion.

4. The liquid medication device according to claim 2, characterized in that The second sheet has a curved slit and is formed in a spiral shape along the slit.

5. The liquid medication device according to any one of claims 1 to 4, characterized in that: The catheter includes a catheter hub that holds a proximal end portion of the catheter body. The retainer has: a base portion formed in a flat plate shape for fixing the adhesive body; and The seat holding portion is formed in a cylindrical shape, at least the front end of which is connected to the seat portion, and the front end of the catheter seat is inserted into and holds the front end of the catheter seat. The seat holding portion holds the catheter hub such that the axis of the catheter hub is inclined relative to the seat portion.

6. The liquid medication device according to any one of claims 1 to 4, characterized in that: The liquid medication device is formed with a coupling portion that releasably couples the needle holding portion and the extending portion.

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