JP2016002393A - Drip tube and drip device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drip tube in which a downstream side opening of the drip tube can be reliably maintained in a closed state upon completion of drip infusion, even if the drip tube is shaken.SOLUTION: A drip tube includes: a base part 8 fixed in the peripheral edge of a downstream side opening 4b2 of a tube body 4a in a lower part in a tube body 4a, and formed of a though-hole 7 of substantially the same diameter or a little smaller diameter as/than a tube 3 in the center; and a flowing interruption part 9 integrally formed in a portion of the though-hole 7 of this base part 8, and inserted in the tube 3 connected to the downstream side opening 4b2. The drip tube is provided with an opening/closing member 6 for opening and closing the downstream side opening 4b2. As a result, when the infusion in the tube body 4a is used up, a pressure in the tube 3 connected to the downstream side opening 4b2 becomes higher than the inside of the tube body 4a of a drip tube 4 by the pressure of the vein in a human body, and the flowing interruption part 9 is easily deformed flatly, and thereby the downstream side opening 4b2 is reliably closed and the regurgitation of the blood is prevented.

Description

  In this invention, the upstream opening and the downstream opening located at both ends of the cylinder body are connected to the tube, and the infusion from the infusion pack is stored in the cylinder body via the tube connected to the upstream opening. The present invention relates to an infusion tube that drops an infusion stored therein into a blood vessel of a person to be instilled through a tube connected to a downstream opening, and an infusion device including the infusion tube.

  In general, infusion is carried out to supply a human body with an infusion solution such as a chemical solution, an electrolyte solution, and a nutrient solution directly into a vein of the human body. At this time, an infusion tube is connected to the infusion pack through a flexible tube made of vinyl chloride or the like, and an infusion needle punctured in a human vein is connected to the infusion tube through the tube. Drip is performed by adjusting the degree of opening and closing of the tube with a clamp attached to the tube between the needle.

  FIG. 7 shows a conventional infusion tube 50, wherein an upstream opening 51a and a downstream opening 51b located at both ends of the tube body 51 are connected to tubes 52 and 53, respectively, and the tube 52 is connected to the upstream opening 51a. Thus, the infusion from the infusion pack is stored in the cylinder main body 54, and the infusion stored in the cylinder main body 54 is dropped into the blood vessel of the subject to be instilled through the tube 53 connected to the downstream opening 51b. Yes.

  By the way, when there is no infusion in the infusion pack and there is no infusion stored in the tube main body 54 of the infusion tube 50, there is a possibility that air may enter the tube 53 on the downstream side. Therefore, it is necessary to evacuate the air in the tube 53 on the downstream side. In order to eliminate such troublesome work, the specific gravity is conventionally smaller in the tube body 54 of the drip tube 50 than the infusion solution. A floating portion 56 larger than the diameter of the tubes 52 and 53 is inserted, and a conical blocking portion 57 having a specific gravity larger than that of the infusion and larger than the downstream opening 51b of the drip tube 50 is connected to the floating portion 56. When the weight 58 further connected to the lower part of the blocking part 57 and the lower part of the blocking part 57 is inserted into the tube 53 and the infusion progresses, the liquid level of the infusion stored in the drip tube 50 is reduced. Part 57 58 is pulled into the tube 53 on the downstream side, the closing portion 57 serves as a guide and the floating portion 56 also moves downward in the drip tube 50, and the closing portion 57 eventually becomes the downstream opening 51b of the drip tube 50. And the structure which played the role of the plug which obstruct | occludes the tube 53 connected to this is proposed (refer patent document 1).

JP 2009-254407 A (paragraphs 0014 to 0016 and FIG. 1)

  However, in the case of the drip tube described in Patent Document 1, since the continuous change in the cross-sectional diameter caused by the conical shape of the blocking portion 57 is used, the infusion surface is gently lowered and floated in the drip tube 50. Although the downstream opening 51b and the tube 53 of the infusion tube 50 can be closed by the closing portion 57 as the position of the portion 56 is lowered, the infusion solution remains in the infusion tube 50 when the closing portion 57 is closed. When the person to be instilled moves while instilling using an infusion stand in this state, the infusion surface in the infusion tube 50 fluctuates violently and the floating portion 56 also shakes on the infusion, so that the infusion tube is interlocked with the movement of the floating portion 56. The clogging portion 57 also moves violently in the infusion solution remaining in the liquid 50, so that the downstream opening 51b of the drip tube 50 and the tube 53 cannot be reliably clogged, and air does not enter below the drip tube 50. Toi There is the role of plug problem of the closed portion can not fulfill.

  Further, when the infusion stored in the infusion tube 50 is completely eliminated and the infusion is completed, the backflow of blood into the infusion tube 50 having a low pressure is caused by the difference between the pressure inside the infusion tube 50 and the venous pressure. In the structure of Patent Document 1 described above, the blocking portion 57 only serves as a plug from above, so that the difference between the pressure inside the drip tube 50 and the venous pressure is temporarily limited. If it is large enough to float up, the blocking portion 57 can no longer serve to stop the backflow of blood. Further, as described above, even when the person to be instilled moves while instilling, the blocking portion 57 is not plugged. The blood backflow phenomenon cannot be prevented because it does not play the role of, and if the blood backflow is left standing, the blood coagulates in the tube 53 on the downstream side, and the next drip does not drip. Drip Would impose a large burden on the infusion person must puncture a new injection needle.

  In fact, in the case of infusions for inpatients or outpatients in hospitals, there are many cases in which the nurse does not come to release the infusion after the scheduled time for the end of the infusion after the nurse prepares the infusion and starts the infusion. In addition, the above-described blood backflow phenomenon occurs during infusion, and there is a situation that the burden of puncture of the injection needle on the patient cannot be reduced.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to ensure that the downstream opening of the infusion tube can be reliably held in the closed state when the infusion is finished even when the infusion tube is shaken.

  In order to achieve the above object, an infusion tube according to the present invention has an upstream opening and a downstream opening located at both ends of a tube main body connected to a tube, and an infusion solution via the tube connected to the upstream opening. In a drip cylinder that stores the infusion from the pack in the cylinder body, and drops the infusion stored in the cylinder body into the blood vessel of the subject via the tube connected to the downstream opening. A base portion fixed to the periphery of the downstream opening of the tube body and having a through hole having the same diameter as that of the tube in the center, and a tube integrally formed with the base portion and connected to the downstream opening. An opening / closing member having an inserted through-flow interrupting portion, wherein the through-flow interrupting portion is formed such that a flexible cylindrical member can be flatly deformed, and when the infusion in the tube body is dropped Open inside the cylinder When the infusion of the infusion is allowed and the infusion in the cylinder main body disappears, the downstream side opening is deformed flat due to a pressure difference between the inside of the cylinder main body and the inside of the tube connected to the downstream side opening. It is characterized by closing (Claim 1).

  Further, it is preferable that the flow interrupting portion is formed in a cylindrical shape by bonding a flexible film material having a predetermined shape (Claim 2), and a pair of broken lines are formed in the flexible cylindrical member. However, it may be deformed flat at the position of the two broken lines (Claim 3).

  Further, it is desirable that the base and the flow interrupting portion are formed of a resin film material having a thickness of 0.01 to 0.03 mm.

  Further, the vicinity of the downstream opening of the cylinder body may have a funnel shape, and the base may be formed in a funnel shape that can be fixed along the shape of the cylinder body near the downstream opening ( Claim 5).

  An infusion device according to the present invention includes the infusion tube according to any one of claims 1 to 5 (claim 6).

  According to the infusion tube of the present invention, when the infusion is completed and the infusion in the tube body of the infusion tube is eliminated, the pressure inside the tube connected to the downstream opening is changed to the inside of the tube body of the infusion tube by the pressure of the veins of the human body. Since the flow interrupting portion is liable to be flattened and become flatter, the flow interrupting portion formed integrally with the base portion opens into a cylindrical shape when the infusion in the cylinder body is dropped. If the infusion in the cylinder body is allowed and there is no more infusion in the cylinder body, the flow interrupting portion deforms flat due to the pressure difference between the inside of the cylinder body and the inside of the tube connected to the downstream opening, thereby closing the downstream opening. . Therefore, when the infusion is completed and there is no infusion in the tube body of the infusion tube, the pressure inside the tube connected to the downstream opening is higher than the inside of the tube body of the infusion tube, and the flow interrupting portion is deformed flat. Thus, even if the drip tube is shaken, the downstream side opening can be closed, and air can be prevented from flowing into the tube connected to the downstream side opening, as well as into the tube body of the drip tube. Thus, it is possible to reliably prevent the backflow of blood, and there is no need to impose a burden of puncture of a new injection needle on a person to be instilled as in the past.

  Further, the flow interrupting portion is formed in a cylindrical shape by bonding a flexible film material, or a pair of broken lines is formed on a flexible cylindrical member and is deformed flat at the position of both broken lines. In this way, when there is no more infusion in the tube body, deformation of the flow interrupting portion is easily realized by the difference between the pressure inside the tube body of the drip tube and the pressure inside the tube connected to the downstream opening. can do.

  Further, when the vicinity of the downstream opening of the cylinder body has a funnel shape and the base is formed in a funnel shape that can be fixed along the shape of the vicinity of the downstream opening of the cylinder body, the base is arranged downstream of the cylinder body. It can adhere to the vicinity of the side opening in a close contact state, and can improve the sealing performance when the flow interrupting portion is deformed. At this time, if the base portion and the flow interruption portion are formed of a resin film material having a thickness of 0.01 to 0.03 mm, for example, polyethylene chloride in addition to polyethylene, the base portion having good sealing property and adhesiveness, and deformation Can be obtained.

  In addition, according to the infusion device of the present invention, it is possible to provide an infusion device that can reliably hold the downstream opening of the infusion tube in a closed state when the infusion is finished even when the infusion tube is shaken.

It is the schematic of one Embodiment of the drip instrument provided with the drip pipe concerning this invention. It is a front view of the infusion tube of FIG. It is a perspective view of the drip tube of FIG. It is explanatory drawing of the preparation process of the closure member in FIG. FIG. 3 is a perspective view of a state where there is a closing member in FIG. 2. It is a perspective view of the state from which the closure member in FIG. 2 differs. It is the schematic of a prior art example.

  An embodiment of the present invention will be described with reference to FIGS.

  For example, as shown in FIG. 1, an infusion device (infusion set) 1 according to the present invention is attached with a detachable transparent cap 1a and punctured into an infusion pack containing an infusion such as a liquid such as a medicinal solution, an electrolyte solution, or a nutrient solution. A tube 2 made of vinyl chloride with a bottle needle 1b connected to one end, and a polyethylene drip in which the other end of the tube 2 is connected to the upstream opening and one end of the vinyl chloride tube 3 is connected to the downstream opening. A cylinder 4 and a clamp 5 that is attached in the middle of the tube 3 and adjusts the degree of opening and closing of the tube 3 are provided. The other end of the tube 3 is connected to an injection needle such as an indwelling needle that is punctured into the vein of the subject.

  Next, the detailed structure of the drip tube 4 will be described. As shown in FIG. 2, the tube 2 is provided through the upstream opening 4b1 of a tube body 4a made of, for example, polyethylene (PE) having a test tube shape. The cover 4c is mounted, the upstream opening 4b1 is closed, and at the same time the tube 2 is inserted into the cylinder main body 4a, and the downstream opening is pierced through the center of the lower end of the cylinder main body 4a curved in a circular arc shape. The tube 3 is connected to 4b2.

  In particular, as shown in FIG. 3, an opening / closing member 6 that opens and closes the downstream opening 4b2 is provided in the lower part of the cylinder body 4a. The opening / closing member 6 is provided on the downstream opening 4b2 of the cylinder body 4a. A base 8 having a through-hole 7 (see FIG. 5) having a diameter substantially the same as or slightly smaller than that of the tube 3 in the center, and a downstream of the base 8 formed integrally with the through-hole 7 portion. And a flow interrupting portion 9 inserted into the tube 3 connected to the side opening 4b2.

  Furthermore, as shown in FIGS. 4 (a) and 4 (b), the base 8 and the flow interrupting portion 9 of the opening / closing member 6 are formed by viewing a polyethylene film having a thickness of 0.01 to 0.03 mm from the side as shown in FIGS. 2 are prepared, and all the left and right sides except for the upper and lower sides of the two elementary bodies 10a and 10b are bonded together by applying or welding an adhesive, as shown in FIG. As described above, by processing into a funnel shape having openings on the upper side and the lower side, the base 8, the flow interrupting portion 9, and the opening / closing member 6 having the through holes 7 at the boundary portions are formed. In addition, H in FIG. 5 is a bonded portion of both element bodies 10a and 10b.

  With the flow interrupting portion 9 of the opening / closing member 6 formed in this way inserted through the downstream side opening 4b2 from the inside of the cylinder body 4a, the outer surface of the base 8 is the downstream side opening of the inner surface of the cylinder body 4a. When the tube 3 is connected to the cylinder body 4a when the tube 3 is connected to the cylinder body 4a, the flow interrupting portion 9 is exposed to the outside through the downstream side through hole 4b2. The intermittent portion 9 is inserted.

  When the drip tube 4 is connected to the infusion pack and the injection needle at the other end of the tube 3 is punctured into the vein of the person to be drip, the infusion solution is stored in the tube body 4a and stored in the tube body 4a. When dropping the infusion, the pressure of the infusion stored in the cylinder body 4a exceeds the pressure of the vein, and the flow interrupting portion 9 of the opening / closing member 6 opens in a substantially cylindrical shape in the tube 3 to allow the infusion of the infusion. The flow is allowed, and the infusion is dropped at the dropping rate adjusted by the clamp 5 in the flow interrupting portion 9.

  On the other hand, when the infusion in the cylinder main body 4a disappears and the infusion is completed, the pressure inside the tube 3 connected to the downstream opening 4b2 becomes higher than the inside of the cylinder main body 4a of the infusion cylinder 4 due to the pressure of the veins of the human body. As shown in FIG. 6, the lower half part is deformed flatly, and the downstream opening 4b2 is closed.

  In this way, the flow interrupting portion 9 formed integrally with the base portion 8 of the opening / closing member 6 opens in a cylindrical shape when the infusion in the cylinder body 4a is dropped, and allows the infusion to drop inside thereof. If the infusion in the cylinder main body 4a disappears, the flow intermittent portion 9 is deformed flat due to a pressure difference between the inside of the cylinder main body 4a and the inside of the tube 3 connected to the downstream side opening 4b2, and the downstream side opening 4b2 is formed. At this time, when the infusion is completed and the infusion in the tube main body 4a of the infusion tube 4 is eliminated, the pressure inside the tube 3 connected to the downstream side opening 4b2 is changed to the tube of the infusion tube 4 by the pressure of the human vein. It becomes higher than the inside of the main body 4a, and the flow interrupting portion 9 is easily deformed to be flat, whereby the downstream opening 4b2 can be reliably closed even when vibration is applied to the drip tube 4.

  Therefore, according to the above-described embodiment, when the infusion in the main body 4a is exhausted, the flow interrupting portion 9 is deformed flat and the downstream opening 4b2 is closed, so that the tube 3 connected to the downstream opening 4b2 is obtained. As a matter of course, the backflow of blood into the tube main body 4a of the drip tube 4 can be surely prevented. An infusion device (infusion set) 1 that does not impose a burden of puncture and can reliably hold the downstream opening 4b2 of the infusion tube in a closed state when the infusion is finished even if the infusion tube 4 is shaken and given vibration. Can be provided.

  Further, since the flow interrupting portion 9 is formed in a cylindrical shape by laminating a flexible film material, when the infusion in the cylindrical main body 4a disappears, the pressure inside the cylindrical main body 4a and the downstream opening The deformation of the flow interrupting portion 9 can be easily realized by the difference from the pressure inside the tube 3 connected to 4b2.

  Further, the vicinity of the downstream opening 4b2 of the cylinder body 4a has a funnel shape, and the base 8 is formed in a funnel shape that can be fixed along the shape of the vicinity of the downstream opening 4b2 of the cylinder body 4a. 8 can be fixed in close contact with the vicinity of the downstream opening 4b2 of the cylinder main body 4a, and the sealing performance when the flow interrupting portion 9 is deformed can be improved.

  Moreover, since the base 8 and the flow interrupting portion 9 are formed by laminating two polyethylene films having a thickness of 0.01 to 0.03 mm, the base 8 having good sealing property and adhesiveness, and deformation are caused. An easy flow interrupting portion 9 can be obtained.

  The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the example in which the base portion 8 and the flow interrupting portion 9 are formed in a cylindrical shape by bonding two polyethylene films is described, but at least the flow interrupting portion 9 has flexibility. A pair of fold lines may be formed on the cylindrical member so as to be deformed flat at the positions of both fold lines. After the base 8 and the flow interrupting portion 9 are formed, the pair of folds are folded in two. A broken line may be formed in both the base 8 and the flow interrupting part 9, and the flow interrupting part 9 may be deformed flat at the position of both broken lines. Furthermore, the material of the tube body 4a of the drip tube 4 is not limited to the above-described polyethylene (PE).

  In the above-described embodiment, an example in which the base 8 and the flow interrupting portion 9 of the opening / closing member 6 are formed of polyethylene has been described. However, the base 8 and the flow interrupting portion 9 may be formed of vinyl chloride. Alternatively, other flexible film materials may be used. In short, it is only necessary to use a material in which at least the flow intermittent portion 9 can be deformed flat.

  The present invention can be applied not only to the above-described infusion device 1 as an infusion set, but also to an infusion device as a transfusion set for transfusion.

1 ... Infusion device (infusion set)
2 ... (Upstream side) tube 3 ... (Downstream side) tube 4 ... Drip tube 4a ... Tube body 4b1 ... Upstream side opening 4b2 ... Downstream side opening 6 ... Opening / closing member 7 ... Through hole 8 ... Base 9 ... Flow interrupting part

Claims (6)

An upstream opening and a downstream opening located at both ends of the cylinder body are connected to a tube, and an infusion from an infusion pack is stored in the cylinder body via the tube connected to the upstream opening, and the cylinder body In the drip tube for dripping the infusion stored in the inside of the blood vessel of the person to be drip through the tube connected to the downstream opening,
A base portion fixed to the periphery of the downstream side opening of the cylindrical body and having a through hole having substantially the same diameter as the tube in the center;
An opening / closing member having a flow interrupting portion inserted into the tube integrally formed with the base and connected to the downstream opening;
The flow interrupting portion is formed so that a flexible cylindrical member can be deformed flat, and when dropping the infusion in the cylinder main body, it opens in a cylindrical shape and drops the infusion inside. When the infusion in the cylinder body is allowed, the downstream opening is closed by being deformed into a flat shape due to a pressure difference between the inside of the cylinder body and the inside of the tube connected to the downstream opening. A drip tube.   2. The drip tube according to claim 1, wherein the flow interrupting portion is formed in a cylindrical shape by bonding a flexible film material having a predetermined shape.   2. The drip tube according to claim 1, wherein the flow interrupting portion has a pair of broken lines formed on a flexible cylindrical member, and is deformed flat at the position of the two folded lines.   The drip tube according to any one of claims 1 to 4, wherein the base and the flow interrupting portion are formed of a resin film material having a thickness of 0.01 to 0.03 mm.   The vicinity of the downstream opening of the cylinder body has a funnel shape, and the base is formed in a funnel shape that can be fixed along the shape of the cylinder body near the downstream opening. The drip tube according to any one of claims 1 to 4.   An infusion device comprising the infusion tube according to any one of claims 1 to 5.

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