CN2505090Y - Balancing cavity - Google Patents

Abstract

The utility model discloses a balancing cavity comprising a cavity provided with an water outlet and a water inlet, wherein, the cavity is provided with two liquid bags, each liquid bag is provided with a hatch, which is communicated with outside the cavity through a connective tube fixed on the wall of the cavity. The balancing cavity has simple structure, easy operation, safe use, good thermostatic efficacy, and applicability to hemodialysis to accomplish the balance of the liquid between entry into and exit out of the dialyzer, thereby accomplishing the aim of hemodialysis.

Description

Counter balance pocket

(1) technical field

This utility model relates to a kind of medical apparatus and instruments, particularly a kind of counter balance pocket device that is applicable to the blood purification treatment process that the acute and chronic renal failure of treatment, uremia, severe poisonous substance and drug intoxication etc. are sick.

(2) background technology

Haemodialysis control unit is the dialyser that blood is made by a kind of semipermeable membrane that can only allow small-molecule substance (as electrolyte, micromolecule kidney toxin) pass through, make the side of blood at film, dialysis solution is at the opposite side of film, the solution of both sides is by disperse, osmosis, be that solute is by the high low side flow of a side direction concentration of concentration, allow in the blood in, the micromolecule toxin may penetrate in the dialysis solution, electrolyte also can reach balance by osmosis, thereby realizes the therapy equipment of blood purification purpose.In haemodialysis control unit, counter balance pocket is mainly used in the dialysis fluid circuit, its role is to guarantee to enter in the dialyser dialysis solution can with equate from the effusive liquid volume of dialyser, in dialysis fluid circuit, add ultrafiltrate pump in addition, the amount of liquid of extracting out from ultrafiltrate pump is the amount of liquid that ultrafiltration goes out from blood samples of patients, thereby reaches the purpose of treatment.

A kind of counter balance pocket is disclosed in the patent No. is the Deutsche Bundespatent of DE4116177, include two cavitys that are divided into by a thin film in the inner space of this counter balance pocket, and each cavity all has a water inlet and outlet, the inner space of counter balance pocket is made of first and second cavity, is thin film between two cavitys; The action principle of this counter balance pocket is: under the adjusting of elastic film, the change of a cavity volume, the volume of another cavity also changes thereupon, and the change amount is identical, and the liquid output of the amount of liquid that so just can guarantee to enter a cavity and another cavity is identical.This counter balance pocket has advantage simple in structure, safe in utilization, but also exist significant disadvantages: (1) owing to have only the sealing fully of two cavitys to separate just and can ensure safety, and particularly the requirement of the machining accuracy of two cavitys and quality of fit is very high so this counter balance pocket structure is to the precision of processing; (2) sterilization of this counter balance pocket is relatively more difficult; Counter balance pocket requires very high to cleannes, need sterilization regularly to guarantee normal use, because the thin film of this counter balance pocket is pressed abd fixed on inside by two cavitys, counter balance pocket need be taken apart as will just thoroughly cleaning, very inconvenient, and ressemble and also cannot say for sure to demonstrate,prove assembly precision, directly feed as not taking cavity apart disinfectant solution advance the cavity cleaning promptly can not thorough disinfection, because the applying of sealing surface is very tight, disinfectant solution is difficult to enter the sealing surface slit and cleans fully; (3) this counter balance pocket wherein temperature of dialysis solution that is hard to keep; Need keep certain temperature (near the temperature of human body) owing to carry out the blood and the dialysis solution of hemodialysis, so need be to the liquid heat in the counter balance pocket to keep its temperature, but this counter balance pocket can not be directly heats wherein dialysis solution, need to establish in addition outside heater, this form is complex structure not only, and also can not guarantee that the fluid in the counter balance pocket remains on certain temperature because fluid flow produces temperature drop.

(3) summary of the invention

The purpose of this utility model is to overcome the shortcoming of prior art, and a kind of simple in structure, esy to use, safe and reliable, counter balance pocket of meeting medical use standard is provided.

The purpose of this utility model is achieved through the following technical solutions: this counter balance pocket comprises a cavity with outlet and water inlet, two liquid bags are arranged in the cavity, each liquid bag all has opening, and the opening of liquid bag is connected to outside the cavity by the connection tube of sealing and fixing on cavity wall.

Described two liquid bags all have outlet and import separately, and the outlet of two liquid bags is connected to outside the cavity by the four piece connection tubes of sealing and fixing on cavity wall with inlet.

Described two liquid bags all have an opening, the opening of two liquid bags all is connected to outside the cavity by two connection tubes of sealing and fixing on cavity wall, connection tube connects one two and is in charge of in that cavity is outside, and two two openings being in charge of are respectively as the outlet and the import of liquid bag.

Described liquid bag is disposable medical transfusion bag or the capsule bag made by elasticity book film.

Described cavity is connected by cavity and chamber lid and constitutes.

Described cavity and chamber lid flexibly connect by movable axis or loose-leaf.

The described housing surface that cooperates with the chamber lid is equipped with sealing strip, and sealing strip protrudes housing surface; Can make the chamber cover rear chamber and chamber lid like this and closely cooperate, thereby reach the effect of seal chamber inner space.

The lid outside, described chamber is equipped with handgrip, and the handgrip two ends are equipped with clasp, and the outside of described cavity is processed with the projection of band wedge groove, and the clasp on the handgrip cooperates with wedge groove fastening on the projection can be made cavity and chamber cover to fit tightly formation one closed cavity.

The outlet of described cavity and water inlet are positioned on the cavity wall, and water inlet and outlet respectively are equipped with connection tube, and outlet is positioned at the spatial peak of cavity inside; The connection tube that is connected with outlet is used for Level Detection, and the connection tube that is connected with water inlet is used to carry liquid to enter in the cavity.

Described cavity internal fixation has positioning strip, and the locating hole that positioning strip can pass the liquid bag positions the liquid bag.

In described cavity or chamber lid or both walls heating member is installed, heating member can produce the liquid in the heat heating closed cavity, make liquid remain on a stationary temperature, isothermal liquid can heat the dialysis solution in the liquid bag that is immersed in wherein simultaneously, makes the dialysis solution of the liquid bag of flowing through maintain a stable temperature.

The operation principle of this counter balance pocket is: in the course of the work, after being full of water in two liquid bags being positioned in the closed cavity that forms by chamber lid and cavity one, and then give in the closed cavity and also be full of water, and in closed cavity, be full of the gateway of shielding closed cavity behind the water, two liquid bags are immersed in the water in the closed cavity; So wherein a liquid bag is full of water, another liquid bag is in airfree vacant state fully, because the expansion of liquids coefficient is constant under the steady temperature, the closed cavity spatial volume is constant, at this moment give vacant liquid bag input certain amount of fluid, then the liquid bag of another full of liquid just must squeeze the liquid of equal quantities, realize entering and discharging the balance of counter balance pocket amount of liquid with this, because the cumulative volume in the closed cavity is constant, the change in volume of two liquid bags transforms mutually, the volume reduction of one of them liquid bag must equal the volume recruitment of another liquid bag, so just can realize flowing into the liquid of a liquid bag with identical from the effusive fluid flow of another liquid bag, two ports that flow into flowing out counter balance pocket are incorporated in the dialysis fluid circuit, can realize that then the dialysis solution that enters dialyser and flow out dialyser equates, thereby guarantee the balance of dialysis solution turnover dialyser.Adopt two above-mentioned counter balance pocket to be connected to the dialysis fluid circuit of haemodialysis control unit and be used the liquid that can realize in the blood dialysis to pass in and out the balance of dialyser, the turnover of the dialysis solution in dialysis fluid circuit dialyser must principle for balance in the blood purification treatment process thereby meet.

This utility model has following advantage with respect to prior art: (1) is simple in structure.Because the member of this counter balance pocket is considerably less, and the connection between the member is very simple, so this counter balance pocket is made handling ease, overcome existing counter balance pocket complex structure, the shortcoming that requirement on machining accuracy is high, and safeguard also very convenient; (2) easy to operate.Because this counter balance pocket adopts the liquid bag to realize the balance of liquid, and the liquid bag is fairly simple with being connected of cavity, thereby the installation before use of liquid bag all is very easy to the taking-up that reaches after use, and the chamber of this counter balance pocket is covered and being sealed and matched of cavity also is easy to realize (only needing the chamber is covered), so the operation of this counter balance pocket is more convenient; (3) safe in utilization.The use of counter balance pocket requires very high to cleannes, if will influence the healthy of patient in inside cavity breed bacteria or other microorganism, this counter balance pocket can adopt disposable transfusion bag to realize the work purpose, this transfusion bag cost is low, after use, can discard, thereby can guarantee the cleannes of this counter balance pocket fully in work process, and do not have the disinfectant trouble, overcome the shortcoming that existing counter balance pocket is difficult to thorough disinfection fully; (4) temperature persistance is good.This counter balance pocket makes it remain on steady temperature by the water in the heating member heating closed cavity in the course of the work, make it keep certain temperature by the liquid in the water heating fluid bag again, because the liquid bag is fully immersed in the water, heat exchange area is very big, so conduct heat easily, and very even, make the fluid temperature (F.T.) of the liquid bag of flowing through more easily keep constant, overcome existing counter balance pocket preferably and kept the comparatively shortcoming of difficulty of temperature.

(4) description of drawings

Fig. 1 is the outside drawing of this utility model counter balance pocket.

Fig. 2 is the front view of counter balance pocket shown in Figure 1.

Fig. 3 is that the A-A of counter balance pocket shown in Figure 2 is to cutaway view.

Fig. 4 is the rearview of counter balance pocket shown in Figure 1.

Fig. 5 is the vertical view of counter balance pocket shown in Figure 1.

(5) specific embodiment

Below in conjunction with accompanying drawing this utility model is described in further detail.

Embodiment

Fig. 1～Fig. 5 shows concrete structure of the present utility model, and as seen from the figure, this counter balance pocket includes cavity 5, chamber 8,14 and four sealing and fixing of 1, two liquid bag of lid are installed in connection tube 2,4,3,11, hot plate 15 on the cavity; Cavity 5 flexibly connects by movable axis 12 with chamber lid 1, cover the sealing strip 7 that 1 cavity that cooperates, 5 inner side surface edges are equipped with protrusion with the chamber, sealing strip 7 protrudes cavity 5 surperficial 2mm, the outside of cavity 5 is processed with the projection 9 of band wedge groove, the chamber is covered 1 outside handgrip 13 is installed, handgrip 13 two ends are equipped with clasp, and the wedge groove on the clasp fastening projection 9 on the handgrip 13 can make cavity 5 fit tightly with chamber lid 1 and form a closed cavity 6; Two liquid bags 8,14 adopt the disposable medical transfusion bag, place in the closed cavity 6, each liquid bag all is connected with a gateway sebific duct of carrying liquid, sebific duct closely is socketed on the connection tube 2,4 that sealing and fixing is installed on cavity 5 walls, and be communicated to outside the closed cavity 6 by connection tube 2,4, connection tube 2,4 connects one two and is in charge of (not shown) in that cavity 5 is outside, and two two openings being in charge of are respectively as the outlet and the import of liquid bag 8,14; What the connection tube 3,11 on cavity 5 walls connected is the outlet and the water inlet of closed cavity 6, outlet is positioned at the peak of closed cavity inner space, the connection tube 3 that is connected with outlet is used for Level Detection, and the connection tube 11 that is connected with water inlet is used to carry liquid to enter in the closed cavity 6; At cavity 5 internal fixation positioning strip 10 is arranged, the locating hole that positioning strip 10 passes liquid bag 8,14 positions liquid bag 8,14; As seen from Figure 3, hot plate 15 is installed in the back of cavity 5, the liquid that hot plate 15 can produce in the heat heating closed cavity 6 make liquid remain on certain temperature (40 ℃～50 ℃), and the liquid of uniform temperature can heat dialysis solution that the liquid bag that is immersed in wherein makes the liquid bag of flowing through and maintain a stable temperature (near 37 ℃ of the body temperature of human body).

Claims (10)

1, a kind of counter balance pocket, it is characterized in that: comprise a cavity (6) with outlet and water inlet, two liquid bags (8,14) are arranged in the cavity (6), and each liquid bag all has opening, and the opening of liquid bag is connected to outside the cavity (6) by the connection tube (2,4) of sealing and fixing on cavity wall.

2, counter balance pocket according to claim 1 is characterized in that: two liquid bags (8,14) all have outlet and import separately, and the outlet of two liquid bags is connected to outside the cavity by the four piece connection tubes of sealing and fixing on cavity wall with inlet.

3, counter balance pocket according to claim 1, it is characterized in that: two liquid bags (8,14) all have an opening, the opening of two liquid bags is connected to outside the cavity by two connection tubes of sealing and fixing on cavity wall, connection tube connects one two and is in charge of in that cavity is outside, and two two openings being in charge of are respectively as the outlet and the import of liquid bag.

4, according to claim 1 or 2 or 3 described counter balance pocket, it is characterized in that: described liquid bag (8,14) is disposable medical transfusion bag or the capsule bag made by elasticity book film.

5, counter balance pocket according to claim 1 is characterized in that: described cavity (6) is flexibly connected by movable axis (12) or loose-leaf with chamber lid (1) by cavity (5) and cooperates formation.

6, counter balance pocket according to claim 5 is characterized in that: cavity (5) surface that cooperates with chamber lid (1) is equipped with sealing strip (7), and sealing strip (7) protrudes cavity (5) surface.

7, according to claim 5 or 6 described counter balance pocket, it is characterized in that: chamber lid (1) outside is equipped with handgrip (13), handgrip (13) two ends are equipped with clasp, and the outside of cavity (5) is processed with the projection (9) of band wedge groove, and the clasp on the handgrip (13) cooperates with wedge groove fastening on the projection (9).

8, counter balance pocket according to claim 1 is characterized in that: the outlet and the water inlet of described cavity (6) are positioned on the cavity wall, and water inlet and outlet respectively are equipped with connection tube (11,3), and outlet is positioned at the peak of cavity (6) inner space.

9, counter balance pocket according to claim 1 is characterized in that: cavity (5) internal fixation has positioning strip (10).

10, counter balance pocket according to claim 1 is characterized in that: in described cavity (5) or chamber lid (1) or both walls heating member (15) is installed.

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