JPH0588554U - Three-way stopcock for infusion with filter - Google Patents

Abstract

(57) [Summary] [Structure] A cylinder having a T-shaped passage and a T-shaped handle 121 internally provided so as to communicate with the main body, in which a conduit 110 is provided in three directions in a T-shape. Plug 120
Three-way stopcock 1 in which is rotatably fitted, and inflow pipe 2
10 and the outflow pipe 211 are erected, and the main structure is the disc filter 2 in which the membrane filter 201 is installed, and the outflow pipe 2 of the disc filter 2
A three-way stopcock for infusion with a filter, characterized in that 11 is fitted and integrated with a conduit 110 at the position of the side tube of the above-mentioned three-way stopcock 1. [Effect] Since the membrane filter is incorporated in the three-way stopcock, there is no need to attach and detach the mixed injection filter as in the conventional case, and foreign substances such as glass fragments and bacteria can be mixed in by a simple method of operating the handle of the three-way stopcock. There is an effect that it is possible to prevent and prevent chemicals that do not pass through the filter and chemicals that do not pass through by simple and safe side injection at approximately the same position simultaneously or sequentially by simply operating the handle of the three-way stopcock.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a three-way stopcock with a filter used when it is necessary to inject another drug solution while infusing a patient.

[0002]

[Prior Art]

 Infusion is a method of supplying various substances necessary for life support from veins to patients who cannot take oral intake or is inadequate. In addition to general infusion, recently burns, malignant tumors, severe infections, etc. The high calorie infusion (IVH), which is mainly used for severely ill patients, has become popular. It may be necessary to infuse antibiotics, cardiotonics, anti-cancer agents, lipid emulsions, and other drug solutions at the same time during these infusions.

In such a case, conventionally, a chemical solution for an ampoule is injected from a mixed injection port of a side tube provided in the middle of an infusion tube by using a syringe. However, foreign matter such as glass pieces, fine particles, and bacteria are However, there is a problem that sepsis, various complications, or phlebitis may occur. In particular, in the case of high-calorie infusion, or when the immune function of children, the elderly, etc. is impaired, the problem is serious and it is necessary to inject the medicinal solution filtered using a filter. However, it is not simple because some infusion liquids, such as fat emulsions, do not want to pass through the filter.

[0004]

[Problems to be solved by the device]

 Therefore, when injecting another drug solution into a side tube (hereinafter abbreviated as side injection) during infusion, the solution requiring filtration is injected from the side injection part upstream of the infusion filter, and one-way filtration is not performed. Since the drug solution to be injected in step 1 is different from the side injection part located downstream of the infusion filter, the injection point is different, and the simplification has been desired for nurses and the like who must operate promptly without error.

Moreover, there is a problem in that it is necessary to mount a mixed injection filter for side-injecting the drug solution of the ampoule with a syringe except for the drug solution which is not desired to be filtered, and the attachment / detachment operation thereof is complicated. The present invention solves the above-mentioned problems and does not need to change the side-injection location as in the conventional case, and the side-injection can be performed simply and quickly by operating the stopcock at the same position, and the mixed injection filter can be attached and detached. It is an object of the present invention to provide a three-way stopcock with a filter, which can reduce the burden on medical staff, reduce the burden on medical staff, and realize safer infusion management.

[0006]

[Means for Solving the Problems]

 Among the above-mentioned problems, with respect to the problem of removing the trouble of mounting and removing the mixed injection filter, the main body 130 provided with the conduits 110 in three directions in a T shape of the present invention is internally provided so as to communicate with the conduits. A three-way stopcock 1 in which a cylindrical plug 120 having a T-shaped passage and a T-shaped handle 121 is rotatably fitted, an inflow pipe 210 and an outflow pipe 211 are erected, and a membrane filter 201 is installed. The main feature of the disc filter 2 is that the outflow pipe 211 of the disc filter 2 is fitted and integrated with the conduit 110 at the side pipe position of the three-way stopcock 1 described above. It was possible to solve the problem by using a three-way stopcock for infusion with a filter. In addition, the solution to the problem of simplifying and accurately performing the side injection work of the drug solution with or without filtration is the same as the three-way stopcock 1 used in the above three-way stopcock with filter. The three-way stopcock 1 (without a filter) can be achieved by connecting two or more consecutive three-way stopcocks with a filter by connecting the main conduits 110 to each other.

[0007]

【Example】

 Hereinafter, the present invention will be described with reference to the drawings of an embodiment. FIG. 1 is an elevational view of a dual type three-way stopcock for infusion with a filter of the present invention (hereinafter, abbreviated as the present invention stopcock), and FIG. 2 is a plan view of the disc filter. Is a sectional view thereof, and FIG. 4 is an elevational view of a series of stopcocks of the present invention. In the figure, 1 is a three-way stopcock, 2 is a disc filter, 3 is a joint, and 4 is a cap.

The three-way stopcock 1 is a rotary-type cylindrical plug body 120 having a T-shaped passage provided in a main body 130 in which conduits 110 are provided in three directions in a T-shape so as to communicate with the conduit 110. Is rotatably fitted. A T-shaped handle 121 with an arrow 122 indicating the direction of flow is attached to the plug 120. The position of each handle of the T-shaped handle 121 corresponds to the opening position of the T-shaped passage in the plug 120.

A female luer lock 111 for screwing the joint 3 or the cap 4 whose inner wall is threaded is provided at the tip of the conduit 110 provided in a T shape from the main body. The joint 3 is fixed to the conduit 110 by adhesion or integral molding. The conduit 110 and the main body 130 are made of transparent plastics such as polypropylene, polyvinyl chloride, polyethylene, methylpentene resin, polycarbonate resin, etc. so that the liquid flowing through them can be seen. A product molded by injection molding or the like is used.

The plug 120 and the handle 121 are preferably made of plastics of different colors, for example, colored polypropylene, polyethylene, polyvinyl chloride or the like to prevent erroneous operation. The outflow pipe 211 of the disc filter 2 is fitted to a pipe (a pipe branching in a direction perpendicular to the direction in which the infusion flows) in the side pipe position in the pipe 110 of the three-way stopcock.

The filter 2 can be removed by pulling it out. The main body of the disc filter 2 is constructed by installing a high-performance membrane filter 201 in an outer peripheral frame 221, radial ribs 222, and circumferential ribs 223 in a disc-shaped housing 220. An inflow pipe 210 is provided at the center of the main body of the disc filter 2, and an outflow pipe 211 is provided upright on the back surface thereof.

The high-performance membrane filter 201 used in the present invention is a hydrophilic membrane that does not adsorb proteins and has little elution from the membrane due to the chemical solution. Therefore, a Teflon membrane is not suitable, and a membrane filter made of 2-phenylidene fluoride (PVDF), such as Durapore made by Japan Millipore Limited, is preferable. The pore size is 0.2 to 0.8 μm, preferably 0.22 μm, which can remove microorganisms and fine particulate foreign matter.

[0013] The size of the disc filter 2 is typically Various materials can be employed by the object diameter 10 to 30 mm, good film filtration area 1 to 10 cm ² at 25 mm, preferably is used as the 4 cm ^2. It is preferable that the inner diameter of the inflow pipe 210 is about 4 mm, and that a luer lock flange for screwing a joint or a cap is provided at the tip portion thereof. The outflow pipe 211 may have the same diameter as the inflow pipe at the filter outlet, but it is preferable to taper the tip of the outflow pipe 211 so that the three-way stopcock can be completely fitted into the conduit 110.

In order to prevent mounting mistakes, it is desirable to change the upper and lower colors of the housing so that the upper and lower sides of the filter can be seen at a glance. The disc filter 2 is made of plastic, such as polypropylene, polyvinyl chloride, or polyethylene, which has a small amount of medically undesirable eluate. A plastic cap 4 is preferably attached to the inflow pipe of the disc filter 2 to prevent foreign matter from entering.

The inner wall of the cap 4 is threaded, and the cap 4 is mounted by being screwed into a flange at the tip of the inflow pipe. Further, in the case of the dual type shown in FIG. 1, it is desirable to attach the same cap to the side pipe part of the three-way stopcock without a filter. The joint 3 has the same mechanism as the cap 4. Polypropylene, polyethylene and polyvinyl chloride are used as the material of the cap and joint, and soft polyvinyl chloride, EVA resin, etc. are used as the connecting tube.

The double-type stopcock of the present invention shown in FIG. 1 described above is particularly effective in the case of high-calorie infusion, and the three-way stopcock with a filter is used to laterally inject a chemical solution that does not require a filter. It is used to side-inject a chemical solution that does not want to pass through a three-way stopcock, such as a fat emulsion. The series-type stopcock in Fig. 4 is used for general infusion, and the three-way stopcock without a filter is omitted because there is no need to side-inject the chemical solution that does not want to pass through the filter.

[0017]

[Action]

 A mode in which a high-calorie infusion is carried out using the dual-type stopcock shown in FIG. 1 will be described. First, regarding the connection mode, an infusion bag filled with a mixed and prepared high-calorie infusion solution, a drip tube, a clamp (flow rate adjuster), and if necessary, a T-shaped mixed injection port, an infusion filter, and a clamp are sequentially connected. The upstream joint 3 of the stopcock of the present invention is connected (locked) to the luer lock terminal of the above tube, and the female luer lock 111 of the downstream conduit 110 and the luer lock joint of the connecting tube are connected. The tip of this connecting tube is connected to a catheter with a joint, and infusion is usually performed from the subclavian vein.

The usage mode of the stopcock of the present invention connected as described above will be described below. During normal infusion without side injection, both the inflow pipe of the three-way stopcock with filter and the side-injection conduit 110 of the three-way stopcock without filter of the present invention are closed. That is, the vertical handles 121 are both in the opposite direction to the conduit 110.

Next, when side-injecting a drug solution that needs to pass through a filter, such as an antibiotic, a cardiotonic agent, an anti-cancer agent, etc., remove the cap 4 of the inflow pipe 210 of the filter of the three-way stopcock with a filter, After inserting the male luer slip of the infusion set of the drug solution into the inflow pipe 210, turn the handle 121 of the three-way stopcock until the side injection conduit 110 is in the same direction to open the side injection port, or Alternatively, in the same manner, the side injection port is opened, and then the drug solution filled in the syringe is injected to allow the drug solution to join the infusion main stream.

Side injection in the case of general infusion using the series of stopcocks of the present invention shown in FIG. 4 is performed in the same manner as above. When side-injecting a drug solution that does not want to pass through a filter, such as a fat emulsion, albumin, etc., or blood, use a three-way stopcock without a filter. That is, the cap 4 of the side-injection conduit 110 of the three-way stopcock may be removed, and then the infusion set or syringe of the drug solution may be connected and side-injected in the same manner as in the case of the drug solution to be passed through the filter.

[0021]

[Effect of the device]

 When the series of stopcocks of the present invention are used, the membrane filter is incorporated into the three-way stopcock, so the handle of the three-way stopcock ( It has the effect that foreign substances such as glass fragments and bacteria can be prevented by a simple method of operating (the device is designed to prevent erroneous operation). It should be noted that although problems such as liquid leakage and bacterial adhesion tended to occur when the conventional mixed injection filter was attached or detached, it can be said that there is no major concern about this point.

The double stopcock of the present invention is particularly effective when side-injecting a drug flow that does not pass a drug solution that needs to pass through a filter, such as a high-calorie infusion solution. In other words, a chemical solution that does not need to be filtered can be conveniently laterally injected from the three-way stopcock without a filter by operating the handle of the three-way stopcock, and simultaneously or sequentially at approximately the same position (previously, it was possible to use mixed injection ports here and there). A chemical solution that needs to be passed through a filter can be easily and safely side-injected from the three-way stopcock with a filter (previously, the complicated operation of attaching and detaching the mixed injection filter was required as described above). It can be said that the advantages are extremely large.

[Brief description of drawings]

FIG. 1 is an elevational view of a dual stopcock.

FIG. 2 is a plan view of a disc filter used therein.

FIG. 3 is a sectional view of the disc filter.

FIG. 4 is an elevational view of a series of stopcocks of the present invention.

[Explanation of symbols]

 1 3-way stopcock 110 3-way stopcock conduit 111 Female luer lock provided at the tip of the conduit 120 Plug 121 121 Plug handle 122 Arrow attached to the handle 130 Stopcock body 2 Disk filter 201 Membrane filter 210 Membrane filter 210 Filter inlet tube 211 Filter Outflow pipe 220 Filter housing 221 Filter outer frame 222 Filter radial ribs 223 Filter circumferential ribs 3 Joints 4 Caps

Claims (6)

[Scope of utility model registration request] 1. A T provided in a main body 130 in which a conduit 110 is provided in three directions in a T shape so as to communicate with the conduit.
Cylindrical plug 1 having a V-shaped passage and a T-shaped handle 121
A three-way stopcock 1 in which 20 is rotatably fitted, and a disc filter 2 in which an inflow pipe 210 and an outflow pipe 211 are erected and a membrane filter 201 is installed.
And the outlet pipe 211 of the disc filter 2 is located at the side pipe of the three-way stopcock 1.
A three-way stopcock for infusion with a filter, which is fitted and integrated with 0. 2. The three-way stopcock with filter according to claim 1, which is the same as the three-way stopcock 1 used in the three-way stopcock.
A three-way stopcock for infusion with a filter in which two or more (without a filter) are connected in series by connecting the main conduits 110 to each other. 3. The membrane filter 201 has a pore size of 0.
The three-way stopcock for infusion with a filter according to claim 1 or 2, which is a membrane filter made of 2-vinylidene fluoride resin of 2 to 0.8 µm. 4. The three-way stopcock for infusion with a filter according to claim 1, wherein the T-shaped handle 121 is provided with an arrow 122 indicating the flow direction and is colored in a color different from that of the conduit 110. 5. The three-way stopcock for infusion with a filter according to claim 1, wherein a luer lock joint 3 is provided on at least one of the main conduits 110. 6. The three-way stopcock for infusion with a filter according to claim 1, wherein a detachable cap is attached to the conduit 110 serving as a side pipe and / or the inflow pipe 210 of the disc filter 2.