CN101642604A

CN101642604A - Embedded positive pressure valve

Info

Publication number: CN101642604A
Application number: CN200910066021A
Authority: CN
Inventors: 张亚根
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-02
Filing date: 2009-09-02
Publication date: 2010-02-10

Abstract

The invention relates to an embedded positive-pressure valve comprising a valve shell and a membrane shell. The valve shell is an assembly which is downwards concave in the middle and is provided witha liquid inlet pipe and a liquid outlet pipe at both ends; the front end surface of the liquid outlet pipe is matched with a valve tongue on the membrane shell to form a positive-pressure valve core;the membrane shell is a reversible concave elastomer and is provided with the valve tongue; the concave direction of a front membrane shell for transfusion is consistent with the concave direction ofthe middle of the valve shell; and the valve tongue closes the front end surface of the liquid outlet pipe. During transfusion, physiological saline is injected by an injector and acts on the membrane shell by the liquid inlet pipe so that the liquid inlet pipe reversely rotates in the concave direction, and the valve tongue moves accordingly and communicates the liquid inlet pipe and the liquidoutlet pipe so that the transfusion can be carried out; and after the transfusion is finished, the membrane shell is lightly pressed so as to reversely rotate in the concave direction. At the time, physiological saline between the membrane shell and the valve shell flows to a treatment pipeline by the liquid outlet pipe to form positive pressure and close the pipe; and a puncture needle is pulledout to finish a transfusion treatment process.

Description

A kind of embedded positive pressure valve

Technical field

The present invention relates to a kind of fitting of medical apparatus that is used for infusion liquid, a kind of specifically and matching used embedded positive pressure valve that is used for the arteriovenous infusion of therapeutic of chemotherapy pump.

Background technology

In treatment of cancer, especially for the chemotherapy of malignant tumor, widespread usage embedding type chemotherapy pump technology.Its distinguishing feature is exactly by subcutaneous implantation administration (puncture) window and connecting line, and chemotherapeutics is directly acted on the generation area of tumor, thereby improves the medicine blood concentration at pathological tissues place.Be the powerful measure for the treatment of cancer and malignant tumor now, but have advantages such as treatment targeting height, the little long term administration of side effect, patient comfort are good.But, because present chemotherapy pump deficiency in design makes it exist following defective and deficiency in clinical use:

One, medical personnel's labor intensity is big and operate loaded down with trivial details.Present chemotherapy pump in use all will carry out the heparin solution tube sealing, and, also to go the operation of pulling out pin while injecting, so just inevitably heparin solution to be injected in the subcutaneous tissue, this is to cause one of the inflammation of chemotherapy pump perienchyma, red and swollen reason.

Two, the security risk that has puncture window seepage.Because chemotherapy pump structural limitations now, in the process of drug treatment, puncture needle must vertically thrust the puncture window.Like this, puncture needle should not be fixed before this, had the chance the rock damage of window (will cause puncture); Be the bottom surface that needle tip is very easily touched chemotherapy pump then, make needle point barb or burr occur, thereby when pulling out pin, damage puncture window (easily causing seepage); Be exactly that the window that punctures all is the circle of about 1 centimetre of diameter in addition, and require acupuncture, concentrate like this and the acupuncture of high frequency time also is a reason that causes seepage easily in the centre (and the puncture window will bear the acupuncture of hundreds of nearly time in actual use).

Three, very easily pipeline blockage taking place and causes the treatment failure.Because chemotherapy pump reasons in structure now, storage medicine space below the puncture window communicates with the pipeline space, when patient the interim body movement of non-treatment (as take exercise, setting-up exercises to radio music) time, cause the unexpected mobile mutually of tube sealing medicinal liquid easily, cause blood to enter from the pipeline end, generation is stopped up and is caused treatment to be failed then.

In China,, also be a fresh thing after all though chemotherapy pump has had the clinical history of more than ten years.Scientific and technical personnel also are in a more preliminary stage to its structural research in the application, though all technical schemes (as: Chinese patent: ZL 96235805.3, ZL 91230089.2) of multitube road, anti-adverse current occurred.But, owing to fail fundamentally to solve the in use many practical problems of chemotherapy pump, and the technique with the apparatus of chemotherapy pump is also rested on the more primary level.That is to say: at present, domestic also not seeing can solve above-mentioned insufficient chemotherapy pump technology fully and be disclosed.

For this reason, a kind of embedded positive pressure valve technology of the present invention combines with chemotherapy pump as the crucial accessory of chemotherapy pump, can solve above-mentioned various deficiency.Simultaneously, a kind of embedded positive pressure valve of the present invention also have structure distinct, easy to manufacture, implement simple, be beneficial to universal characteristics.

Summary of the invention

The present invention is made of jointly valve casing and putamina two parts.It is characterized in that: valve casing is that a middle part is depression downwards, and two ends are respectively the composite entity of feed tube and drain pipe, and wherein the front end face of drain pipe cooperates the common positive valve core construct of forming with clack valve on the putamina.Putamina is a reversible concave elastomer, and a clack valve is arranged on it.Clack valve is an outwardly directed thin-slab structure from the putamina, and it stretches out the tangential direction of stretching out on direction and the putamina a little at an angle.Valve casing and putamina are combined hermetically by being connected structure, form embedded positive pressure valve jointly, and wherein the size of clack valve, position are consistent with size, the position of the front end face of drain pipe.

When the depression direction at the depression direction of putamina and valve casing middle part is consistent, size, the shape of two spill contact surfaces consistent (its shape can be circular, ellipse or other shapes).Simultaneously, the front end face of the drain pipe on the valve casing closely contacts with clack valve on the putamina, and the clack valve on the putamina is hard pressed elastic deformation.At this moment, feed tube on the valve casing and drain pipe can not communicate owing to the effect of the clack valve on putamina and the putamina.

In clinical, the feed tube of a kind of embedded positive pressure valve of the present invention is connected with chemotherapy pump, and drain pipe is connected with the treatment pipeline, forms embedding type drug-supplying system jointly.During treatment, at first inject normal saline,, act on the putamina, its depression direction is reversed through chemotherapy pump, feed tube.When the depression direction at the depression direction of putamina and valve casing middle part was opposite, both formed an airtight cavity jointly.At this moment, the clack valve on putamina is opened to top offset and with the front end face of drain pipe with the counter-rotating of putamina.Since the clack valve on the putamina stretch out angle design between the tangential direction of stretching out on direction and the putamina a little, make clack valve on the putamina only be deformed in the time of to reverse fully and could remove its hard pressed elastic deformation, and the front end face of the drain pipe of sealing is opened at putamina.Promptly compare the counter-rotating of putamina depression direction, the action that the clack valve on the putamina is opened the front end face of the drain pipe of sealing has certain hysteresis quality.At this moment, feed tube on the valve casing and drain pipe are owing to the displacement of clack valve on counter-rotating of the depression direction of putamina and the putamina communicates.So infusion treatment can carry out, after finishing, need only press the putamina that is positioned at subcutaneous embedded positive pressure valve with light finger, its depression direction is reversed, and the normal saline that then is stored between putamina and the valve casing will flow to the treatment pipeline by drain pipe, thereby realize malleation.Afterwards, the clack valve on the putamina is with the front end face sealing of drain pipe, and then the realization tube sealing.Pull out puncture needle, this infusion treatment finishes.

This shows that a kind of embedded positive pressure valve of the present invention has in clinical practice that structure is simple, effect is clear and definite, simple to operate, characteristics that need not heparin in sealing.Combine with createing a kind of novel embedding drug-supplying system, to benefit vast cancer patient with chemotherapy pump.

Description of drawings

Fig. 1 is the structural representation of a kind of embedded positive pressure valve of the present invention when non-transfusion.

Fig. 2 is the structural representation of a kind of embedded positive pressure valve of the present invention when transfusion.

Specific embodiment

As shown in Figure 1, the present invention is made up of valve casing 1 and putamina 2 two parts.When itself and chemotherapy pump are common when forming embedding malleation chemotherapy drug-supplying system, on the feed tube 1A of valve casing 1, connect chemotherapy pump, on the drain pipe 1C of valve casing 1, connect the treatment pipeline.When not infusing, the depression direction of putamina is consistent with the depression direction at valve casing middle part, size, the shape of two depression faying faces consistent (its shape can be circular, oval or other shapes).Valve casing 1 combines by the structure (1D and 2B) that is connected on it respectively hermetically with putamina 2.Simultaneously, the front end face 1B of the drain pipe 1C on the valve casing 1 closely contacts with clack valve 2A on the putamina 2.Clack valve 2A on the putamina 2 is hard pressed elastic deformation.At this moment, feed tube 1A and drain pipe 1C can not communicate owing to the effect of the clack valve 2A on putamina 2 and the putamina 2 on the valve casing 1.That is to say: liquid in the treatment pipeline and the storage liquid in the chemotherapy pump are in state of isolation.

Fig. 2 is the structural representation of a kind of embedded positive pressure valve of the present invention when transfusion.Form embedding malleation chemotherapy drug-supplying system and when preparing transfusion, at first inject in chemotherapy pump by syringe when the present invention and chemotherapy pump are common, make that pressure raises in the chemotherapy pump with normal saline.Because chemotherapy pump is airtight linking to each other with feed tube 1A on the valve casing 1, the pressure in the chemotherapy pump will be by the biography of the feed tube 1A on the valve casing 1 on the surface of putamina 2.When pressure reached the force value that makes putamina 2 generation counter-rotatings, the depression direction of putamina 2 was reversed.Clack valve 2A on the putamina 2 opens to top offset and the front end face 1B of the drain pipe 1C on the valve casing 1 of sealing with the counter-rotating of putamina 2 at this moment.In addition, because the clack valve 2A on the putamina 2 stretches out angle design between the tangential direction of stretching out on direction and the putamina 2 a little, make the clack valve 2A on the putamina 2 also only be deformed to reverse fully the time at putamina 2, just can remove its hard pressed elastic deformation, and the front end face 1B of the drain pipe 1C on the valve casing 1 of sealing is opened.At this moment, feed tube 1A on the valve casing 1 and drain pipe 1C are owing to the displacement that counter-rotating and the clack valve 2A on it take place for the depression direction of putamina 2 communicates.That is to say: liquid in the treatment pipeline and the storage liquid in the chemotherapy pump are in conducting state at this moment, can carry out infusion treatment.

After infusion treatment finishes, will treat liquid and change normal saline into the chemotherapy drug-supplying system is washed.Then, to being embedded in subcutaneous embedded positive pressure valve body, and light press mold shell 2 downwards makes putamina 2 its depression under the pressure of finger be directed downwards counter-rotating with finger touch.At this moment, normal saline between valve casing 1 and putamina 2 will flow to the treatment pipeline by the drain pipe 1C on the valve casing 1 under the effect of putamina 2, subsequently, the clack valve 2A on the putamina 2 is also to the front end face 1B sealing of bottom offset with the drain pipe 1C on the valve casing 1, thus formation malleation and tube sealing.Afterwards, pull out puncture needle, finish the infusion treatment process.

Claims

1, a kind of embedded positive pressure valve is dimerous by valve casing 1 and putamina 2.It is characterized in that: valve casing 1 is that a middle part is depression downwards, and two ends are respectively the composite entity of feed tube 1A and drain pipe 1C.Wherein the front end face 1B of drain pipe 1C cooperates the common positive valve core construct of forming with clack valve 2A on the putamina 2.Putamina 2 is a reversible concave elastomer, and a clack valve 2A is arranged on it.Valve casing 1 combines by the structure (1D and 2B) that is connected on it respectively hermetically with putamina 2.

2, according to the said a kind of embedded positive pressure valve of claim 1, the clack valve 2A on the putamina 2 is an outwardly directed thin-slab structure from the putamina 2.It stretches out the tangential direction of stretching out on direction and the putamina 2 a little at an angle.

3, according to the said a kind of embedded positive pressure valve of claim 1, in the assembly of valve casing 1 and putamina 2, the size of the clack valve 2A on the putamina 2, position are consistent with size, the position of the front end face 1B of drain pipe 1C.

4, according to the said a kind of embedded positive pressure valve of claim 1, when the depression direction at the depression direction of putamina 2 and valve casing 1 middle part was consistent, size, the shape of two depression faying faces were consistent.Its shape can be circular, oval or other shapes.Simultaneously, the front end face 1B of the drain pipe 1C on the valve casing 1 closely contacts with clack valve 2A on the putamina 2.Clack valve 2A on the putamina 2 is hard pressed elastic deformation.At this moment, feed tube 1A and drain pipe 1C can not communicate owing to the effect of the clack valve 2A on putamina 2 and the putamina 2 on the valve casing 1.

5, according to claim 4, when liquid acts on the putamina 2 by the feed tube 1A on the valve casing 1, and make pressure reach one can make the value that counter-rotating takes place putamina 2 time, the depression direction of putamina 2 is reversed, also have only when putamina 2 begins to reverse, the clack valve 2A on the putamina 2 just can leave the drain pipe 1C on the valve casing 1 front end face 1B and to top offset.

6, according to the said a kind of embedded positive pressure valve of claim 1, the counter-rotating of the depression direction by putamina 2 changes, and drives the clack valve 2A upper and lower displacement on the putamina 2, can realize feed tube 1A and the conducting between the drain pipe 1C on the valve casing 1 and closes.

7, according to the said a kind of embedded positive pressure valve of claim 1, the counter-rotating of the depression direction by putamina 2 changes, and the cavity volume between valve casing 1 and the putamina 2 is changed, and realizes that thus the malleation that flows to the drain pipe 1C direction on the valve casing 1 designs.