JPH1057473A - Medical suction apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent bacteria from entering the inside of a cylinder chamber and to accurately measure a suction amount. SOLUTION: In this medical suction apparatus, a plunger 20 is attached to a body 10 in which a syringe chamber 15 provided with a suction port 11 is formed inside so that an outer peripheral surface 22 is slid into the syringe chamber 15. The body 10 is connected to the projection part of the plunger 20 projecting from the opening part 14 of the body 10 by a closing member 30 to form a closed chamber 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical aspirator, and more particularly to a medical aspirator employed for draining or injecting a certain amount of dialysate.

[0002]

2. Description of the Related Art Conventionally, as a medical suction device of this type, a body in which a syringe chamber having a suction port is formed and a plunger inserted so that the outer peripheral surface of the syringe chamber slides. Such suction devices are widely and generally used.

Further, as a suction device used for collecting a certain amount of liquid such as a solvent, a suction device described in Japanese Utility Model Laid-Open No. 4-99057 is known.

[0004]

However, in the above-mentioned conventional medical suction device, there is a possibility that bacteria or the like may enter the cylinder chamber from the sliding plunger.

[0005] The problem of the invasion of such bacteria is described in Japanese Utility Model Application Laid-Open No. 4-9.
Although the use of the inside of the bellows as a cylinder chamber is solved as in the suction device described in Japanese Patent Application Laid-Open No. 9057, the problem that accurate measurement cannot be performed with repeated use of the suction device described in the above Patent Document. Occurs. That is, since the suction device described in the publication employs a bellows as a means for measuring the amount of the liquid to be sucked,
There has been a problem that the bellows itself is bent by repeatedly shrinking the bellows, and this bending causes variation in the measured amount.

Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a suction device which does not allow bacteria to enter the inside of a cylinder chamber and which can accurately measure a suction amount. As an issue.

[0007]

In order to solve the above problems, a medical suction device according to the present invention includes the above-mentioned syringe chamber 15 provided in a body 10 in which a syringe chamber 15 having a suction port 11 is formed. A medical suction device in which a plunger 20 is inserted so that an outer peripheral surface 22 slides, wherein the body 10 and a protruding portion of the plunger 20 protruding from an opening 14 of the body 10 are connected by a closing member 30. This is characterized in that the closed chamber 25 is formed by squeezing.

Here, the projecting portion of the plunger 20 refers to a portion projecting from the opening portion 14 of the body 10 when the volume inside the syringe chamber 15 is minimum (when the plunger 20 enters the most).

In the medical suction device having the above-mentioned structure, a predetermined amount of liquid or the like can be sucked and discharged from the suction port by sliding the plunger 20 inside the syringe chamber 15.

In the medical suction device according to the present invention, since the body 10 and the protruding portion of the plunger 20 are connected by the closing member 30 to form the closing chamber 25, the plunger 20 inside the closing chamber 25 is No external bacteria attach.

Further, in the medical aspirator according to the present invention, the closing member 30 is constituted by a bellows 31 which can be extended and contracted, and the closing chamber 25 is covered with a bactericidal gas permeable membrane 26. It is also possible to adopt a configuration in which the outside air can be sucked and discharged through the ventilation hole 27.

In the medical suction device according to the second aspect of the present invention, the bellows 31 contracts due to the sliding of the plunger 20 to cause a change in the volume inside the closed chamber 25, but the outside air is closed via the ventilation hole 27. Because it is sucked or discharged into the chamber 25, the closed chamber
25 Internal pressure change can be adjusted. In particular, in the medical suction device according to the second aspect, since the vent hole 27 is covered with the bactericidal gas permeable membrane 26, the suction or discharge of the outside air into the closed chamber 25 is not performed. Since it is performed via 26, it is possible to prevent bacteria from entering the inside of the closed chamber 25.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of a medical suction device according to the present invention, a dialysis device mounted on a peritoneal dialysis cartridge 1 having a plurality of valves 4 and conduits 2 while referring to FIGS. The medical suction device for sucking and discharging the liquid will be described below.

The medical suction device of this embodiment has a body 10 having a syringe chamber provided with a suction port 11 formed therein as shown in FIG. 1 and an outer peripheral surface 22 sliding on the syringe chamber 15. It comprises a plunger 20 inserted into the body 10 and a bellows 31 connected to the body 10 and the plunger 20 to form a closed chamber 25. In this embodiment, the closing member of the present invention is used.
Reference numeral 30 denotes a bellows 31.

As shown in FIGS. 1 and 3 (a), the body 10 has a suction port 11 protruding from the upper end and a syringe chamber formed on the inner surface.
15 has a substantially cylindrical shape, and an opening 14 at the lower end has a flange 12 bulging outward.

As shown in FIG. 3B, the flange 12 has four perforations 13,... In this embodiment, the body 10 is made of transparent polypropylene.

The plunger 20 has an outer peripheral surface 22 that slides inside the syringe chamber 15 at the upper end of the shaft 21 and a flange 23 that is wider than the shaft 21 at the other end. Become. Here, as shown in FIG. 2, ventilation holes 27,... Further, a bactericidal gas permeable membrane 26 is adhered to the outer surface of the flange 23 over substantially the entire surface, whereby each vent hole 27 is covered with the bactericidal permeable gas membrane 26. In this embodiment, the body 10 is made of transparent polypropylene.

Further, one end of the bellows 31 is fixed to the back of the flange 12 of the body 10, and the other end of the bellows 31 is fixed to the front of the flange 23 of the plunger 20,
The bellows 31 is attached to the body 10 and the plunger 20 so as to be contracted by the movement of the plunger 20. A closed chamber 25 is formed between the bellows 31, the body 10 and the plunger 20. Here, the bellows 31 is attached with a high-frequency induction /
Welded by dielectric heating. Specifically, as the film having heat generation properties, a film made of aluminum or the like can be used in the case of high-frequency induction heating, and a film made of polyvinyl chloride can be used in the case of high-frequency dielectric heating.

The bellows 31 and the flange 23 of the plunger 20
Is fixed outside (outer peripheral side) of the vent hole 27 of the flange portion 23 of the plunger 20. That is, the vent hole 27 is formed in the flange 23 of the plunger inside the fixing portion of the bellows 31. In this embodiment, the bellows 31 is formed of low-density polyethylene.

The medical aspirator of the present embodiment has the above-described configuration, and the method of use will be described below. First, a cartridge for peritoneal dialysis to which the medical aspirator of the present embodiment is attached is shown in FIG. This will be described below.

The cartridge 1 for peritoneal dialysis to which the medical aspirator of the present embodiment is mounted is the one described in Japanese Patent Application No. 8-41641, which was previously invented by the present applicant, and as shown in FIG. Are connected to each other by opening and closing desired valves 4,... Provided in the respective pipes 2,. I have.

Here, the cartridge 1 is formed by attaching a soft synthetic resin film to both surfaces of a plate material in which desired grooves and perforations are formed. Here, the valve 4 is formed by the perforated portion and the film of the portion, and by pressing the film of the desired perforated portion, the pipe 2 is formed from the groove.
Is formed. In FIG. 4, reference numeral 7 denotes a negative pressure monitor in which a plate material is perforated and films are similarly adhered to both sides of the plate material. The negative pressure monitor 7 is connected to the groove to form a part of the pipe 2. And the pressure of the dialysate flowing through the conduit 2 can be measured by measuring the swelling or bending of the film of the negative pressure monitor 7.

In FIG. 4, reference numeral 6 denotes a suction device mounting portion provided on the cartridge 1;
Are provided with perforations 13, formed in a flange 12 of the body 10,
Are provided at positions corresponding to.

The cartridge 1 for peritoneal dialysis, to which the medical suction device of the present embodiment is mounted, has the above-described configuration. In the medical suction device of the present embodiment, the suction port 11 is connected to the predetermined conduit 2 of the cartridge 1. Are connected to the end portions of the cartridge 1 so that the perforations 13,... And the convex portions 5,... Are fitted to each other, and the convex portions 5,. It is fixed to the cartridge 1. The suction port
Numeral 11 is attached to the cartridge 1 via a gasket (not shown), so that the dialysate is prevented from leaking from the suction port 11.

The medical aspirator of the present embodiment fixed to the cartridge 1 as described above is incorporated in a peritoneal dialysis device (not shown) together with the cartridge 1, and the plunger 20 is held up and down by a holding member inside the device. It is held by the holding member so as to slide by moving.

When the holding member moves up and down with the desired valves 4,... Opened to remove the dialysate from the patient's body or to transfer the dialysate to the heating vessel, the present embodiment Aspirator repeatedly sucks and drains dialysate.

At this time, the total amount of dialysate from which the dialysate has been removed from the patient is measured by the number of times the holding member moves up and down (the number of times the plunger 20 slides) and the volume of the syringe chamber 15.

As described above, the medical suction device of the present embodiment
As described above, it is possible to measure the volume of the dialysate (aspirated or discharged) that has been drained from the patient's body or transferred to the heating vessel for the dialysate. Can be performed very efficiently. The medical suction device of the present embodiment has an advantage that the amount of the dialysate can be accurately measured without causing a variation in the measured amount due to bending as in the suction device described in the above-mentioned known publication. . Further, when the plunger 20 is slid a plurality of times as in the peritoneal dialysis apparatus of the present embodiment, and the total amount needs to be measured based on the number of times of sliding, the conventional well-known medical suction device is provided. The problem is particularly pronounced,
The medical suction device of the present embodiment is particularly useful in such a case.

Further, since the closed chamber 25 is formed by connecting the body 10 and the plunger 20 with the bellows 31, bacteria do not adhere to the plunger 20 inside the closed chamber 25, so that the inside of the syringe chamber 15 can be prevented. It has the advantage that the invasion of bacteria can be prevented and the dialysate can be accurately prevented from being attacked by the bacteria.

Although the medical aspirator of the above embodiment has the above-described configuration, it has the above advantages, but the medical aspirator according to the present invention is not limited to the above embodiment. By connecting the body 10 and the protruding portion of the plunger 20 protruding from the opening 14 of the body 10 with the closing member 30, any medical suction device that forms the closing chamber 25 belongs to the scope of the present invention. is there.

That is, in the above-described embodiment, the closing member 30 is constituted by the bellows 31. However, the present invention is not limited to this. Even if a film is adopted and the film is connected to the body 10 and the plunger 20, it is also within the scope of the present invention. However, the bellows capable of extending and contracting the closing member 30 as described in the above embodiment and claim 2.
By configuring the medical aspirator 31, the medical aspirator itself can be made compact, and this has the advantage that the medical machine can be easily incorporated into the device.

In the second aspect of the present invention, it is not an essential requirement that the vent hole 27 covered with the germicidal gas permeable membrane 26 be provided in the flange 23 of the plunger 20 as in the above embodiment. For example, the syringe chamber 15 of the body 10 may be provided at a portion where the outer peripheral surface 22 of the plunger 20 does not slide, or may be provided at the bellows 31. However, it is preferable to adopt a configuration in which one end of the bellows 31 is fixed to the flange 23 of the plunger 20 and the vent hole 27 is formed inside the fixed portion as described in the above embodiment and claim 3. This has the advantage that the maximum volume of the syringe chamber 15 can be set larger than the case where the vent hole 27 is provided in the body, and the germicidal air-permeable membrane 26 is more likely to be damaged than the case where the vent hole 27 is provided in the bellows 31. It has the advantage of being small and easy to manufacture.

Further, in the above embodiment, the case where the cartridge is mounted on a cartridge for peritoneal dialysis has been described, but the medical suction device of the present invention is not necessarily limited to the method of use in the above embodiment.

Further, even when the cartridge is mounted in the cartridge as in the above embodiment, the mounting method is not limited to the mounting method as in the above embodiment. For example, as a mounting method, the body 10 and the cartridge 1 may be welded in advance, and then the body 10, the bellows 31, and the bellows 31 and the plunger 20 may be welded.

Further, the materials and the like of each member are not limited to those in the above embodiment, and the design can be changed as appropriate.

[0036]

As described above, the medical suction device according to the present invention has a structure in which the body and the protruding portion of the plunger are connected by the closing member to form a closing chamber. This has the effect of preventing bacteria from adhering to the inside of the cylinder chamber without causing bacteria to adhere to the cylinder, and accurately measuring the suction amount (discharge amount) from the number of times or the sliding distance of the plunger. In particular, even if the plunger is repeatedly slid, the measured amount does not vary as in a known suction device, and the suction amount (discharge amount) can be accurately measured. .

Further, in the medical suction device according to the second aspect of the present invention, the internal pressure can be adjusted with respect to a change in volume of the closed chamber by the air hole. Because it is covered, it has the effect of preventing bacteria from entering the inside of the cylinder chamber, and the bellows is used as the closing member, so that the suction device itself can be made compact, and medical equipment and the like can be used. This has the effect that it can be easily incorporated inside.

[Brief description of the drawings]

FIG. 1 is a front view of a medical suction device according to an embodiment of the present invention.

FIG. 2 is a bottom view of the embodiment.

FIG. 3 shows a body of the medical suction device of the embodiment,
(A) is a left side sectional view, and (B) is a plan view.

FIG. 4 is a rear view showing the cartridge to which the medical suction device of the embodiment is mounted.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cartridge, 2 ... Pipe line, 3 ... Connection port, 4 ... Valve, 5
... projecting part, 6 ... mounting part, 10 ... body, 11 ... suction port, 12 ...
Flange, 13 ... perforated, 14 ... opening, 15 ... syringe chamber, 20
... Plunger, 21 ... Shaft, 22 ... Outer circumference, 23 ... Flange, 24 ...
Fixing site, 25… Occlusion chamber, 26… Bactericidal air-permeable membrane, 27… Ventilation hole, 30… Occlusion member, 31… Bellows

Claims (3)

[Claims] A body (10) having a syringe chamber (15) having a suction port (11) formed therein has a plunger (20) so that an outer peripheral surface (22) slides on the syringe chamber (15). ) Is a medical suction device having the body (10) and the body (10) inserted therein.
A medical suction device characterized in that a closing chamber (25) is formed by connecting a protruding portion of a plunger (20) protruding from an opening (14) of the above with a closing member (30). 2. The closing member (30) is formed of a bellows (31) that can be extended and contracted, and the closing chamber (25) has a ventilation hole (27) covered with a bactericidal gas-permeable membrane (26). 2. The medical suction device according to claim 1, wherein the medical air suction device is formed so as to be capable of sucking and discharging the outside air via (). 3. A shaft portion (2) is provided on a protruding portion of the plunger (20).
1) a wider flange portion (23) is formed, and
The medical suction device according to claim 2, wherein one end of the bellows (31) is fixed to the (23), and the ventilation hole (27) is formed inside the fixing portion (24).