CN1179332A - Detachable blood seal - Google Patents

Abstract

The invention provides a blood seal which can prevent blood from leaking during arrangement and use of a vascular catheter or a similar device. The blood seal contains a housing with a near site end part and a far site end part. The housing contains an inner channel provided in the housing and is constituted so as to pass the needle through the channel. An elastic seal is fixed on the channel to prevent substantially a fluid from flowing out through the channel. Thereby, it can prevent blood from leaking.

Description

Detachable blood

Sealing device

The present invention relates to a kind of detachable blood seal that is used to connect various medical apparatus and instruments, more particularly, the present invention be a kind of suitable especially be used for sealing follow the detachable blood seal of conduit closely at venous patient or the localized vascular conduit of intra-arterial.

It is the apparatus of common use of medical apparatus and instruments that patient's vascular conduit is given in transfusion.The insertion of vascular conduit allows to enter repeatedly or continuously patient's blood circulation.The vascular conduit generally inserts patient's extremity, and liquid and medicine are imported in the patient body by such conduit.

Such conduit generally is vein or the tremulous pulse that inserts patient by the guiding syringe needle.In a kind of ordinary construction, conduit begins to place the syringe needle top, has the syringe needle that is positioned at syringe needle top conduit and inserts the patient body, is inserted into desired vein or tremulous pulse position always.In case syringe needle and conduit are in appropriate location in vein or the tremulous pulse, from conduit and vein or tremulous pulse, to extract syringe needle out and syringe needle is scrapped, conduit is stayed in vein or the tremulous pulse, so that provide the blood circulation that enters patient under the condition that the syringe needle that does not have repeatedly penetrates.

When conduit inserts and various positioning step when finishing, an end of pipe (or " feeding mechanism ") generally is to be connected with the close end of conduit, and the opposite end of pipe is joined with liquid and medicine source.The interior typically dress of this fluid supply is disposed the bottle or the bag of patient's required liquid, in case the telescopic joint fluid supply that arrives then allows liquid to flow into pipe and enters conduit, and finally arrives patient.Under maximum situations, flow of liquid is crossed pipe and entered patient body to be by gravity or to adopt a kind of standard injection pump.

Should be appreciated that it is minimum importantly will to make blood leakage arrive external environment condition in each above-mentioned step process.Blood leakage can make healthcare givers and other staff that the rotten sensation of blood is arranged, as Aids (AIDS) and hepatitis patients'blood.Blood leakage energy contaminated equipment also is sent to disposal area.The seepage of blood also may produce the unnecessary sense of being in an emergency to part patient and other observer.Therefore, for maintenance safe, keep the clean of aesthetic feeling and equipment and the good operation order is provided, it is very important preventing or reducing blood leakage.

The phenomenon that all has blood leakage for the conduit of locating necessary several steps and employing the above-mentioned type.In case one of these steps is that conduit is in place and will removes the guiding syringe needle, flowing out conduit at blood as this step 1 has the of short duration time to surrounding, and other is possible potential, and to cause step of blood leakage be pipe and being connected of conduit.It is complicated finishing these operations, carries out multiple-task and relates to many equipment because the healthcare givers faces in fact possibly simultaneously.Briefly, the healthcare givers can not have the hands of enough usefulness finishing the seepage of suitably controlling blood when other must be operated.

In the catheter positioning process, dispose the blood leakage problem and done a lot of effort, yet the apparatus that these solutions of proposition generally include all is complicated and expensive.For example, a kind of such instrumentation a kind of quite complicated valve system that is connected with catheter proximal end portion, it will be opened when syringe needle inserts, and closes when syringe needle is removed then, and valve is opened again.This apparatus requires that the mechanism that makes the valve repeated open and close is arranged, and the accessory structure of other this apparatus of easy operating.These quite complicated structures make the complicated and cost increase of this apparatus.In addition, the design of valve gear will remain on pipe connection back in place, and this has just increased patient and has stimulated and uncomfortable factor.

Therefore, improvements over the prior art are, provide a kind of in localized each step process and when using conduit, can control the apparatus of blood flow; Improvements over the prior art also are, inexpensive and simple to operate a kind of apparatus is provided.Improvements over the prior art are that also the apparatus that provides is the sleeve pipe that does not need traditional instruments, and syringe needle, pipe etc. carry out bigger remodeling just can be used.At last, the improvement that Special Significance is arranged to prior art is that a kind of like this apparatus is provided, and it has the more control means for the healthcare givers when finishing around location tasks and using conduit.

The present invention is a kind of detachable blood seal that is used for preventing vascular conduit and like instrument location and use blood leakage.In a kind of most preferred embodiment of the present invention, this blood seal has a shape to be essentially columniform body.Conduit is connected with body in the process of catheter positioning step with the guiding syringe needle.When using apparatus of the present invention, when location and use vascular conduit, the healthcare givers has been increased motility, and can make blood leakage minimum.

The shape of body distal end appearance can make catheter mount and distal portion be removable to be connected, can to use the method for attachment of various routines, and for example, catheter mount can be by frictional engagement, and Lu Eshi locking mechanism or any other device are connected with body.The shape of body proximal end portion can make and guide the pinhead handle that syringe needle is connected and be removable connection, can use the various conventional method of attachment that comprises as frictional engagement and Lu Eshi locking mechanism.In a most preferred embodiment of the present invention, the groove that pinhead handle and body connecting device comprise directly and body disposes, it is with respect to a stop part on the pinhead handle.This stop part is locked in the groove in the catheter positioning process, and by the syringe needle fix in position.In case the location is finished with syringe needle and shifted out, this stop part can be disengaged with groove, and pinhead handle and guiding syringe needle are shifted out.

The internal channel of this blood seal is configured in the body, and its shape can make the guiding syringe needle by this internal channel.The sealing device of high-elastic gonosome is fixed in the passage, and barrier liquid flows through passage basically.Sealing device the most handy high resiliency body material such as rubber with comprise that the synthetic high resiliency system of latex, polyisoprene, silicones and polyurethane becomes.The planform of sealing device makes when the guiding syringe needle penetrates the sealing device and then removes, and seals the liquid flow of internal channel basically.

This blood seal can have other selectable characteristic, for example, say in some sense, it is helpful advancing joint in the configuration of body outside, this allows user in the catheter positioning process, easier and accurately handle whole conduit mechanism, this also is very important in catheter positioning step process difficulty and accurate.Therefore, can comprise selectively in some example of this apparatus as the propelling joint.

The present invention is used in the location and uses the vascular catheter procedure to control the seepage of blood.The present invention comprises that the motility of the blood flow barrier that provides has increased in periodic each step.Therefore, relating to blood leakage is actually the relevant issues of surrounding and has reduced.

Advantage and the purpose narrated in order to understand above the present invention are more comprehensively done more specifically explanation with reference to specific embodiment by the present invention who shown in the accompanying drawing top letter is chatted.But note that at the embodiment shown in each accompanying drawing and be only used for illustrating the present invention.

Fig. 1 is the perspective view that explanation guiding syringe needle is inserted into the one embodiment of the invention of blood seal;

Fig. 2 is conduit of representing in Fig. 1 that is connected with blood seal and the embodiment of the invention partial cut-away perspective view of guiding needle assembly;

Fig. 3 is the assembly cross-sectional view that the syringe needle represented along the 3-3 line in Fig. 2 penetrates sealing device;

Fig. 4 is the perspective view of another embodiment of apparatus of the present invention, wherein guides syringe needle and thrusts blood seal, also comprises the propelling joint and the stop part of blood seal housing in Fig. 4 embodiment;

Fig. 5 is the perspective view of the partly cut-away of embodiment shown in Fig. 4, the guiding needle assembly that wherein is illustrated locks in place in this blood seal housing, and conduit is connected with blood seal;

Fig. 6 is along the cross-sectional view of the apparatus of the present invention of 6-6 line among Fig. 5;

Fig. 7 is that expression guiding syringe needle, the sealing device retracted are in place and at another cross-sectional view of the apparatus of the present invention of retracting stop part on the position;

Fig. 8 comprises that rigidity pushes the cross-sectional view of another embodiment of the present invention of joint open.

Fig. 9 is the cross-sectional view that comprises a single high resiliency body member and have another embodiment of apparatus of the present invention that pulls out joint.

The present invention can be best understood with reference to accompanying drawing, and wherein similar elements is represented with identical label.In Fig. 1, generally that represent is an embodiment of detachable blood seal of the present invention with 10.As mentioned above, blood seal 10 can keep blood sealing in catheter proximal end portion, and conduit is located in the patient body, and then removes the guiding syringe needle.This allows the healthcare givers to have an interval to prepare pipe is connected on the conduit, and does not need to pay close attention to the blood leakage that blood produces by sleeve pipe 24.

As shown in Figure 1, blood seal 10 has one to be generally columniform body 12.Body 12 has a distal portion 14 and close end 16.The concrete shape of distal portion 14 is that catheter mount can detachably be connected with distal portion 14.When adopting the embodiment of apparatus shown in Figure 1, conduit is connected with truncated cone coupling part 18 in the frictional engagement mode.Yet other juncture also can adopt, and engages comprising threads engage and road E Shi locking mechanism.

The body 12 of blood seal 10 also has a close end 16.The shape of close end 16 is guiding syringe needle 22 connected pinhead handles 20 to be detachably with body 12 be connected.Owing to have a coupling part 18, be that mode by frictional engagement connects at Fig. 1 pinhead handle 20 to the embodiment shown in Figure 3.Yet, adopt other further go through such routine below or unconventional method of attachment also be possible.

Should be appreciated that when pinhead handle is fixed on the body 12 relevant guiding syringe needle or sleeve pipe 22 are by being configured in the passage 24 in blood seal 10 bodies 12.As following further go through, syringe needle 22 is by the high-elastic gonosome sealing member 26 of fixed configurations in passage 24.Therefore, syringe needle 22 is prepared to use when conduit is introduced patient's vascular.

Fig. 2 shows the blood seal 10 that is connected with pinhead handle 20 with catheter mount 28, and as top concise and to the point the discussion, catheter mount 28 is to be connected with the distal portion 14 of body 12 by frictional engagement.Specifically, catheter mount 28 is to slide to enter 18 tops, truncated cone coupling part, till suitably fixing with the body 12 of blood seal 10.

At the close end 16 of body 12, pinhead handle 20 is connected in the close end 16 by the frictional engagement mode.When pinhead handle 20 was connected on the body 12, syringe needle 22 passed sealing member 26 and stretches out, as shown in the figure, the preferably high-elastic gonosome sealing member of sealing member 26, fixed configurations is in the internal channel 24 of body 12.When syringe needle was in position shown in Figure 2, sealing member 26 was close to and is fitted in around the syringe needle 22.When syringe needle 22 when sealing member 26 is extracted out, sealing member 26 is around near the syringe needle hole, thereby prevents by sealing member 26 seepages.Therefore, pinhead handle 26 can be taken apart under the situation that does not have blood leakage danger.

Can more fully understand the using method of blood seal 10 with reference to Fig. 3.Fig. 3 is the cross-sectional view along the blood seal 10 of the 3-3 line of Fig. 2.Fig. 1 and Fig. 2 show the body 12 of blood seal, also show distal portion 14 and close end 16 simultaneously.The catheter mount 28 that illustrates is the truncated cone coupling parts 18 by distal portion 14, is connected with body 12 by the frictional engagement mode.But as reference Fig. 3 complete understanding, catheter mount 28 slides into the position of 18 tops, coupling part easily.Equally, when blood seal 10 need be when catheter mount 28 be removed, catheter mount 28 can be from the coupling part 28 slips out, and this is very simple thing.

As shown in Figure 3, shown pinhead handle 20 is connected with close end 16.This pinhead handle 20 and close end 16 are connected by frictional engagement.When this position, syringe needle passes high-elastic gonosome sealing member 26.When catheter mount 28 and pinhead handle 20 as shown in Figure 3 with blood seal 10 fixedly the time, syringe needle 22 and conduit can be prepared to insert among the patient body at any time.

During operation, syringe needle 22 is usually located at the ideal position that conduit inserts.More often than not, can be in the patient's blood vessel.In case when syringe needle 22 was arranged in blood vessel, conduit 28 slipped into endovascular position above syringe needle 22, syringe needle 22 retracts simultaneously.Retracting of syringe needle 22 is to throw off with the close end 16 of body 12 by pinhead handle 20 to realize.Pinhead handle 20 is from moving away from body 12 then.Syringe needle 22 is retracted pass sealing member 26.Syringe needle 22 finally leaves blood seal 10 fully.Because the performance of the high-elastic gonosome of sealing member 26, the formation fluid tight seal is sealed in the syringe needle hole at once.Therefore, eliminated the blood leakage that produces in this course.

In the process of another preparation process that the healthcare givers need take, blood seal prevents that blood flow from crossing conduit.In case pinhead handle 20 and syringe needle 22 are suitably settled, and the healthcare givers may take the necessary steps, and pipe is connected to catheter mount 28.This can be by being applied to the pressure on blood seal 10 downstream conduit, and the method that flows out conduit with limit blood is finished.Then, blood seal 10 is removed from catheter mount 28, and pipe is put back into blood seal 10 at once.In such a way, eliminated the seepage of blood effectively.

Forward Fig. 4 now to, there is shown the embodiment of another kind of apparatus of the present invention, and represent with 50 usually.As aforesaid embodiment, blood seal 50 is formed by being generally cylindrical body 52.Body 52 has a distal portion 54 and a close end 56, distal portion 54 and close end 56 all with at Fig. 1 to shown in Figure 3 different.Importantly, the close end 56 of body 52 is provided with a groove 58.

The configuration of groove 58 makes its receiving portion stop part 60 in locking engages, and this stop part 60 forms a part of pinhead handle 62.Between groove 58 and the stop part 60 juncture with reference to Fig. 6 can be best explanation.Should be appreciated that because the extension 64 of stop part 60 is by syringe needle 66 fix in position, stop part is the position that is pushed in the groove 58.As shown in Figure 7, when syringe needle 66 was removed, stop part 60 and extension 64 were rotated down, and this makes pinhead handle break away from from blood seal 50 easily.

To Fig. 6, the connected mode of catheter mount and blood seal 50 also is accessible with reference to Fig. 4.In the present embodiment, the flange 70 with catheter mount 68 is screwed in the screw thread 72 of body 52 distal portion 54.This screw engagement can be by using Lu Eshi locking mechanism or other conventional helicitic textures to realize.Therefore, when requiring a body 52 when catheter mount 68 is removed, reverse body 52 until to make its disengagement be the very simple thing of part.

Also show syringe needle 66 at Fig. 4 to Fig. 6, as at aforesaid embodiment, this syringe needle 66 penetrates and extends through high-elastic gonosome sealing member 76.As described above, the sealing part can be with any the making in many ideal materials.Spendable material for example comprises rubber and the synthetic high-elastic gonosome as latex, polyisoprene, silicones and polyurethane.When syringe needle 66 was removed, the high-elastic elastomer material that forms fluid tight seal can be applicable in the scope of the present invention.

In Fig. 4 to Fig. 7, also show joint 78.Joint 78 is positioned on the blood seal 50, and joint 78 is used for settling syringe needle 66 and conduit like this.Joint 78 allows user in the accurate step process in vein or tremulous pulse, more easily control apparatus of the present invention at syringe needle and catheter positioning.

Fig. 5 is depicted as and uses and the blood seal 50 of assembling, and it has catheter mount 68 and the pinhead handle 62 that is connected.As discussed above, this catheter mount 68 is to be connected with the distal portion 54 of body 52 by threads engage, and pinhead handle 62 is that the groove 58 by top narration is connected with stop part mechanism 60.Therefore, blood seal shown in Figure 5 is prepared at any time and can be used when conduit imports patient.

To make catheter installation in vein or tremulous pulse in the syringe needle 66 insertion patient bodies.In case finish this operation, syringe needle 66 can be removed, and as shown in Figure 7, stop part and extension mechanism remove from groove 58, and this is because their biased downward shift out pinhead handle 62 from body 52.In case this a series of step is finished, conduit is then in place and by blood seal 50 sealing.Healthcare givers thereby can constantly remove sealing device easily, and connect pipe or analog.

Fig. 8 shows another embodiment of the present invention, generally represents with label 80.The shape of this blood seal 80 is generally truncated cone shape.Blood seal 80 can with those skilled in the art the suitable material in the well-known wide range make.Blood seal 80 comprises body 82 and sealing member 84.The sealing member of narrating above the structure and material of sealing member 84 is similar to 26 and 76.As shown in Figure 8, blood seal 80 comprises that a rigidity pushes away joint 86, and this joint 86 allows user easily handle whole apparatus.

In Fig. 8, also show conventional pinhead handle 88, syringe needle 90 and conduit 92.The shape of this blood seal 80 can be connected it in the mode of describing with conduit by frictional engagement.Pinhead handle 88 also is fitted in the blood seal 86 of truncated cone shape.When this apparatus was assembled by attached syringe needle 90, handle 88 and conduit 92, syringe needle penetrated and extends through sealing member 84.When catheter positioning was finished, pinhead handle and blood seal 80 disengagings were closed, and syringe needle slips over sealing member 84.Thereby sealing member 84 prevents that liquid from further flowing through conduit 92, until till this blood seal removes.

Fig. 9 shows generally with 100 another embodiment of the present invention that represent.In this embodiment, the apparatus of invention is a high-elastic gonosome sealing member.In this structure, because whole apparatus is to be made by high-elastic elastomer material, so do not need sealing member separately is provided, the example of this apparatus also comprises a pulling joint 102 that is used to handle this apparatus.The operation of this embodiment of the present invention is similar with embodiment shown in Figure 8 in essence.

In general, the invention provides in a kind of each step process that when inserting conduit, relates to the apparatus of control blood flow.Apparatus low price provided by the invention and simple to operate.Blood seal of the present invention can also be used under the situation of conventional conduit, syringe needle, pipe etc. not being made great remodeling.

The present invention can other distinctive forms be specialized under the situation that does not break away from its design or basic feature.The embodiment that is narrated in all respects only as an illustration, and be not be the restriction the present invention.Therefore scope of the present invention is included by additional claims, rather than is limited by above-mentioned explanation.Dropping on the change that equivalents in the claim and scope do includes within the scope of the present invention.

Claims (10)

1. detachable blood seal, it comprises:

A body;

An internal channel that is configured in the body, the shape of this internal channel can make syringe needle pass described internal channel; With

Fixed configurations is in described passage and the sealing member of the described passage of primary stricture, and the shape of described sealing member is, sealing member and removing then as described in penetrating as syringe needle, and then described sealing member is the mobile internal channel of sealing liquid basically.

2. according to the detachable blood seal of claim 1, wherein, described body shape is to make it can be during catheter positioning is in the patient body, and fixed in position is between conduit and pinhead handle.

3. according to the detachable blood seal of claim 2, wherein, described conduit is to be detachably with described blood seal by frictional engagement to be connected.

4. according to the detachable blood seal of claim 2, wherein, described conduit is to be removable by the Lu Eshi locking mechanism with described blood seal to be connected.

5. according to the detachable blood seal of claim 1, also comprise the device that is used for body is locked onto pinhead handle.

6. according to the detachable blood seal of claim 5, wherein, the described device that is used for body is locked onto pinhead handle comprises friction engagement device.

7. according to the detachable blood seal of claim 5, wherein, the described locking mechanism that is used for the device that body locks onto pinhead handle is comprised a Lu Eshi.

8. according to the detachable blood seal of claim 5, wherein, the described device that is used for body is locked onto pinhead handle comprises that is configured in an intrinsic groove, and this groove is corresponding to the stop part on the described pinhead handle.

9. according to the detachable blood seal of claim 1, also comprise a propelling joint that is configured in described body exterior.

10. according to the detachable blood seal of claim 1, wherein, described sealing member is made by silicone rubber.

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