CN208389100U - Remaining needle with indwelling air cavity - Google Patents
Remaining needle with indwelling air cavity Download PDFInfo
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- CN208389100U CN208389100U CN201720933059.5U CN201720933059U CN208389100U CN 208389100 U CN208389100 U CN 208389100U CN 201720933059 U CN201720933059 U CN 201720933059U CN 208389100 U CN208389100 U CN 208389100U
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- needle tubing
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Abstract
The utility model relates to a kind of remaining needles, especially a kind of remaining needle with indwelling air cavity, including conduit tube component, the barriers that are mounted on its inner cavity, puncture needle tubing and the operation handle affixed with needle tubing, its composition is characterized by: having air-chamber in front of barriers, barriers are set to the collateral aperture rear, collateral aperture rear end along with there is distance between barriers front end face, this distance is along end distance, this is 2.0-7mm along end distance, this is air-chamber along catheter block inner cavity of the end in, and barriers length is less than pointed orifice distance.Have the advantages that remove needle resistance small, it is easy to operate, blood can effectively be prevented again simultaneously, pollution is overflowed by blood back side opening, solved and perplex can not being closed in time due to being formed by duct by needle tubing oppression on barriers, cause the blood back of the no obstruction technical problem excessive from the duct rapidly of this field for a long time.
Description
Technical field
The utility model relates to a kind of remaining needle, especially a kind of remaining needle with indwelling air cavity.
Background technique
In existing remaining needle technology as shown in Figure 1, its by conduit tube component 1, be mounted on barriers 2, the puncture needle of its inner cavity
Pipe 3 and the operation handle 4 affixed with needle tubing composition.This structure remaining needle, barriers 2 are made of sealing material, and material is cut
Duct is not preset on face, is punctured needle tubing 3 and is run through from section center is longitudinal, the barriers section after removing needle again restore without residual by elasticity
It boxes out, thus liquid barrier.Catheter block is made of transparent or semitransparent material in conduit tube component, from transparent when convenient for puncturing
Blood back is observed in catheter block inner cavity, and blood can flow into transparent conduit seat inner cavity when in order to puncture, and needle tubing front end is equipped with a tip
Opening 3.1, and the side opening 3.2 of observation blood back is punctured, such blood flows into syringe intracavity by tip inlets 3.1, then passes through back
Blood side opening 3.2 flows out, and into the annular space between needle tubing and conduit, then flows into transparent conduit seat inner cavity, that is, whether can determine whether needle point
It is pierced into intravascular.The distance between front end and the rear end of blood back side opening 3.2 of tip inlets 3.1 are pointed orifice distance.And this structure
Remaining needle is made, needle tubing is withdrawn from after the completion of puncture, is especially withdrawn in barriers in needle tubing needle portion, it is necessary to assure barriers have
Sufficient length can encase tip inlets and blood back side opening on needle tubing simultaneously completely, just be not the blood of transparent conduit seat inner cavity
Liquid penetrates outside needle tubing front end inner cavity and blood back side opening overflow duct seat, and blood is caused to pollute.This construction, in order to guarantee not overflow
Blood, the length of barriers must be made to be longer than pointed orifice distance, so just produce barriers and pass through outside the needle tubing in it
Contact surface area increases, removes the shortcoming that frictional resistance during needle greatly increases naturally.This construction is also easy to simultaneously
Generate another shortcoming: since remaining needle is in long-term storage and transport process, barriers and needle tubing are chronically at extruding compressing shape
State, barriers compression generate a kind of deformation for being not easy to restore, after needle tubing is withdrawn from, are formed on barriers by needle tubing oppression
Duct be easy to produce the phenomenon that can not being closed in time, cause the blood back of no obstruction excessive from the duct rapidly.
Summary of the invention
The purpose of the utility model is to overcome shortcomings in the prior art, and provide one kind to remove needle resistance smaller,
The excessive remaining needle with indwelling air cavity of blood back can effectively be obstructed again simultaneously.
The purpose of this utility model is realized by following approach.
Remaining needle with indwelling air cavity including conduit tube component, the barriers that are mounted on its inner cavity, punctures needle tubing and and needle
Affixed operation handle is managed, needle tubing front end is equipped with a tip inlets and punctures the side opening of observation blood back, after side opening is located at opening
Side, the distance between open front point and side opening aft terminal are pointed orifice distance, have lateral indwelling channel, the channel on catheter block
Collateral aperture has mutually been passed through between catheter block inner cavity, composition is characterized by: there is air-chamber, barriers setting in front of barriers
In the collateral aperture rear, collateral aperture rear end along with there is distance between barriers front end face, this distance for along end distance, this
Along end, distance is 2.0-7mm, this is air-chamber along catheter block inner cavity of the end in, and barriers length is less than pointed orifice distance.
In this way, since barriers length is less than pointed orifice distance, so that barriers and needle tubing contact area reduce many, thus
It is lighter to may make that needle operation is removed in puncture for the small many of the frictional force that slides axially between the two, especially big specification remaining needle.?
Before puncture vessel, infusion apparatus is connected, needle tip inclination is downward or fair, it opens infusion apparatus flow control valve and is excluded
Air in pipeline, can be between end face (front end face) and collateral aperture back edge (rear end edge) of the barriers towards collateral aperture
(i.e. along the distance length space of end) forms an air-chamber, and bubble is equal with fluid pressure in air-chamber, has obstructed liquid flow direction
Barriers end face.Exhaust is completed to close wall flow control valve.After retained needle puncture sets pipe success, needle tubing of dropping back, needle tubing needle section
It point withdraws near barriers, is not stopped recession with normally removing needle speed still, blood back side opening exits outside barriers first on needle tubing, and
Needle tubing tip inlets are still also in catheter block or in barriers, due to pressure in bubbles in air-chamber and catheter block inner cavity blood pressure
Power is consistent, has obstructed blood and has flowed to barriers end face, has also just obstructed blood by needle tubing tip inlets and has entered syringe intracavity, then
Pass through blood back side opening overflow duct seat outer tunnel.Simultaneously because bubble has obstructed blood and flows to barriers end face in air-chamber, when
The deformation duct that barriers are formed because being oppressed by needle tubing, when the slow self-closing generated after removing needle tubing restores, first
Bubble first overflows in air-chamber, and blood can be only achieved barriers end face, has given barriers to restore the self-closing time, has prevented blood
Overflow pollution, it is thus possible to remove needle operation calmly.
The purpose of this utility model can also be realized by following approach.
Along end, distance is preferably 3.0-4.0mm.
It is not easy to form effective air-chamber apart from too small along end, it is too big to make the excessive of entire catheter block longitudinal length again,
Along end, distance is that 2.0-7.0mm can take into account this two o'clock, but optimal selection is 3.0-4.0mm.
It is provided with a kind of sliding sleeve in the inner cavity of the conduit tube component at barriers rear, a kind of sealing groove sealing element plug is located at sliding
It covers in inner cavity, sealing element front end face is close to barriers rear end face, and sealing element rear end face and sliding sleeve inner sidewall patch are touched, sliding sleeve
Periphery wall and conduit tube component internal chamber wall slide and have damping connection, and sealing element is a kind of elastomer, needle tubing through the sealing element with
And sliding sleeve inner sidewall, it is provided with a kind of annular convex clip of radial protrusion on the needle tubing at side opening rear, is arranged on sliding sleeve rear wall
The intermediate bore dia for wearing needle tubing between this annular convex clip outer diameter and needle tubing outer diameter, barriers length be less than pointed orifice away from
From.
In this way, after puncture and intubation success, drop back needle tubing, when needle tubing needle portion is withdrawn in barriers, blood back on needle tubing
Side opening exits outside barriers, and into sealing groove sealing element, and needle tubing tip inlets are still also in catheter block or in barriers, but
Sealing due to blood back side opening by sealing groove sealing element has also just obstructed blood by needle tubing tip inlets and has entered syringe intracavity,
Pass through blood back side opening overflow duct seat outer tunnel again.Continue needle tubing of dropping back, until needle tubing blood back side opening is sealed completely into sealing groove
In part, annular convex clip offsets with the outer sliding sleeve inner sidewall of sealing element on needle tubing, is further continued for recession needle tubing, band dynamic seal and sliding
Set slides together, and last needle tubing takes sealing element and sliding sleeve out of catheter block inner cavity, and sealing groove sealing element has prevented blood and passed through back
Blood side opening overflows pollution, it is thus possible to remove needle operation calmly.
Barriers length is smaller, then removes that needle resistance is smaller more to facilitate operation, but should at least be greater than the length of needle point opening.
On the basis of air-chamber setting, then this sealing groove sealing element is added, to obstruct back before and after barriers
The excessive setting of blood, it is short enough so as to doing of can trusting barriers length, it might even be possible to be short to and only be opened than needle point
The slightly longer of length of mouth both may be used.Needle resistance is removed in this way, being able to maximally reduce.
Sealing element center can be not provided with through-hole or gap through the position of needle tubing, can also preset a gap convenient for needle
Pipe runs through, and can also longitudinally run through has one and the more slightly smaller through-hole of needle tubing outer diameter.
Annular convex clip one is flat or an olive shape.
There is the transition of smooth slope shape between annular convex clip rear end and needle tubing.
Sliding of the needle tubing in conduit and sealing element through-hole is convenient in this smooth slope shape transition.
In conclusion the utility model has the advantages that remove needle resistance small, it is easy to operate, while can effectively prevent again
Blood overflows pollution by blood back side opening, solve perplex for a long time this field due to being pressed for a long time on barriers by needle tubing
The blood back of the no obstruction technical problem excessive from the duct rapidly can not be closed in time, cause by compeling to be formed by duct.
Detailed description of the invention
Fig. 1 is a kind of containing needle structure schematic diagram in the prior art.
A kind of structural schematic diagram of the remaining needle with indwelling air cavity described in Fig. 2 the utility model embodiment one；
Fig. 3 is that a kind of remaining needle with indwelling air cavity described in the utility model embodiment one removes needle status diagram；
Fig. 4 is the state of a kind of remaining needle with indwelling air cavity described in the utility model embodiment one removed after needle
Schematic diagram；
A kind of structural schematic diagram of the remaining needle with indwelling air cavity described in Fig. 5 the best embodiment of the utility model；
Fig. 6 is the schematic diagram of one of the best embodiment of the utility model one needle tubing and conduit；
Fig. 7 is that a kind of remaining needle with indwelling air cavity described in the best embodiment of the utility model removes needle-shaped state signal
Figure；
Fig. 8 is that a kind of remaining needle with indwelling air cavity described in the best embodiment of the utility model removes needle-shaped state signal
Figure；
Fig. 9 is that a kind of remaining needle with indwelling air cavity described in the best embodiment of the utility model removes needle-shaped state signal
Figure；
Figure 10 is the status diagram of a kind of remaining needle with indwelling air cavity described in most preferred embodiment removed after needle；
More description in detail is carried out to the utility model with reference to the accompanying drawing.
Specific embodiment
Embodiment one:
Referring to Fig. 2, a kind of remaining needle with indwelling air cavity, including conduit tube component 1, the barriers 2 that are mounted on its inner cavity,
Puncture needle tubing 3 and the operation handle 4 affixed with needle tubing.Barriers 2 are made of the sealing material of liquid barrier, on the section of material
Duct is not preset, but generally penetrates in order to needle tubing while being removed in needle tubing in the leading prefabricated perforative gap in the needle tubing place of penetrating
It can be closed again after out.Needle tubing 3 is punctured to run through from section center is longitudinal.Catheter block is by transparent or semitransparent material in conduit tube component
Be made, when convenient for puncturing from transparent conduit seat inner cavity blood back, and blood can flow into transparent conduit seat when in order to puncture
Chamber, needle tubing front end is equipped with a tip inlets 3.1, and punctures the side opening 3.2 of observation blood back, and such blood passes through tip inlets 3.1
Syringe intracavity is flowed into, then is flowed out by blood back side opening 3.2, into the annular space between needle tubing and conduit, then flows into transparent conduit seat
It is intravascular to can determine whether needle point is pierced into for inner cavity.Between the front end of tip inlets 3.1 and the rear end of blood back side opening 3.2 away from
From for pointed orifice distance L2.There is air-chamber 1.1, barriers 2 are set to the collateral aperture rear, behind collateral aperture in front of barriers
It holds edge and there is distance between barriers front end face, this distance is, along end distance L3, this is 2.0-7.0mm along end distance L3, most
Good selection is 3.0-4.0mm, this is air-chamber 1.1 along catheter block inner cavity of the end in.Barriers L1 length be less than pointed orifice away from
From L2.
Referring to Fig. 3 and Fig. 4, barriers and needle tubing contact area reduce many in this structure remaining needle, thus the two it
Between slide axially the small many of frictional force, it is lighter to may make that needle operation is removed in puncture for especially big specification remaining needle.Puncturing blood
Before pipe, infusion apparatus is connected, needle tip inclination is downward or fair, it opens infusion apparatus flow control valve and carries out in exclusion pipeline
Air can form an air-chamber towards the end face (front end face) in collateral aperture and collateral orifice edge (rear end edge) in barriers
1.1(is i.e. along the distance length space of end), bubble is equal with fluid pressure in air-chamber 1.1, has obstructed liquid and has flowed to barriers
Tube wall flow control valve is completed in end face, exhaust.After retained needle puncture sets pipe success, needle tubing of dropping back, needle tubing needle portion is withdrawn to
Near barriers, do not stopped recession with normally removing needle speed still, blood back side opening exits outside barriers first on needle tubing, and syringe tip
End opening is still also in catheter block or in barriers, due to pressure in bubbles in air-chamber and catheter block inner cavity blood pressure one
It causes, has obstructed blood and flowed to barriers end face, also just obstructed blood by needle tubing tip inlets and entered syringe intracavity, then passed through
Blood back side opening overflow duct seat outer tunnel.Simultaneously because bubble has obstructed blood and flows to barriers end face in air-chamber, work as barrier
Part by needle tubing because being oppressed due to the deformation duct that is formed, in the slow self-closing recovery generated after removing needle tubing, bubble first
Intracavitary bubble first overflows, and blood can be only achieved barriers end face, has given barriers to restore the self-closing time, has prevented blood from overflowing
Pollution, it is thus possible to remove needle operation calmly.
The not described part of the present embodiment is same as the prior art.
Most preferred embodiment:
The present embodiment is on the basis of example 1, to increase aftermentioned design, this aftermentioned design content is as follows:
Referring to Fig. 5, a kind of remaining needle with indwelling air cavity, including conduit tube component 1, the barriers 2 that are mounted on its inner cavity,
It punctures needle tubing 3 and the operation handle 4 affixed with needle tubing forms.Barriers 2 are by liquid barrier but do not obstruct the spongy material of air
Material forms, and channel is not preset on the section of material, punctures needle tubing 3 and runs through from section center is longitudinal, the barriers section after removing needle
Elasticity is restored without residual channel, thus effective liquid barrier again.Catheter block is by transparent or semitransparent material in conduit tube component
Be made, when convenient for puncturing from transparent conduit seat inner cavity blood back, and blood can flow into transparent conduit seat when in order to puncture
Chamber, needle tubing front end are equipped with a tip inlets 3.1 and puncture the side opening 3.2 of observation blood back, and such blood is flowed by tip inlets 3.1
Enter syringe intracavity, then flowed out by blood back side opening 3.2, into the annular space between needle tubing and conduit, then is flowed into transparent conduit seat
It is intravascular to can determine whether needle point is pierced into for chamber.
Referring to Fig. 6, side opening 3.2 is located at the rear of opening 3.1, be open between 3.1 forward terminals and 3.2 aft terminal of side opening away from
With a distance from for pointed orifice.Be provided with a kind of annular convex clip 3.3 of radial protrusion on the needle tubing at 3.2 rear of side opening, annular convex clip 3.3 or
Person is a flat or olive shape.There is the transition of smooth slope shape between annular 3.3 rear end of convex clip and needle tubing 3.
Referring to Fig. 5, a kind of sliding sleeve 6, a kind of sealing groove sealing are provided in the inner cavity of the conduit tube component 1 at 2 rear of barriers
The plug of part 5 is located in 6 inner cavity of sliding sleeve, and 5 front end face of sealing element is close to 2 rear end face of barriers, 5 rear end face of sealing element and sliding sleeve
The patch touching of 6 inner sidewalls, 6 periphery wall of sliding sleeve and 1 internal chamber wall of conduit tube component slide and have damping connection, and 5 center of sealing element is longitudinal to be passed through
It is installed with one to be convenient for wearing the gap of needle tubing, the intermediate bore dia for wearing needle tubing being arranged on 6 rear wall of sliding sleeve is between this convex annular
Between card outer diameter and needle tubing outer diameter, barriers length is less than pointed orifice distance.
Barriers and needle tubing contact area reduce many in this structure remaining needle, thus the friction that slides axially between the two
It is lighter to may make that needle operation is removed in puncture for the small many of power, especially big specification remaining needle.
Before puncture vessel, infusion apparatus is connected, needle tip inclination is downward or fair, it opens infusion apparatus flow and adjusts
Valve carries out excluding the hollow gas of pipeline, understands end face (front end face) and collateral orifice edge (rear end in barriers towards collateral aperture
Edge) an air-chamber 1.1(is formed i.e. along the distance length space of end), bubble is equal with fluid pressure in air-chamber 1.1, barrier
Liquid flows to barriers end face, and tube wall flow control valve is completed in exhaust.After retained needle puncture sets pipe success, needle tubing of dropping back, needle
Pipe needle portion is withdrawn near barriers, is not stopped recession with normally removing needle speed still, blood back side opening exits resistance first on needle tubing
Outside spacing body, into sealing groove sealing element, as shown in fig. 7, and needle tubing tip inlets still also in catheter block or in barriers, but
Sealing due to blood back side opening by sealing groove sealing element has also just obstructed blood by needle tubing tip inlets and has entered syringe intracavity,
Pass through blood back side opening overflow duct seat outer tunnel again；Again due to pressure in bubbles in air-chamber and catheter block inner cavity blood pressure one
It causes, has obstructed blood and flowed to barriers end face, also just obstructed blood by needle tubing tip inlets and entered syringe intracavity, then passed through
Blood back side opening overflow duct seat outer tunnel.Simultaneously because bubble has obstructed blood and flows to barriers end face in air-chamber, work as barrier
Part by needle tubing because being oppressed due to the deformation duct that is formed, in the slow self-closing recovery generated after removing needle tubing, bubble first
Intracavitary bubble first overflows, and blood can be only achieved barriers end face, has given barriers to restore the self-closing time, has prevented blood from overflowing
Pollution, it is thus possible to remove needle operation calmly.
Continue needle tubing of dropping back, until needle tubing blood back side opening is completely into sealing groove sealing element, convex clip and sealing element on needle tubing
Outer sliding sleeve medial surface offsets, as shown in Figure 8；It is further continued for recession needle tubing, convex clip and sliding sleeve interstitial hole card touch on needle tubing, drive
Sealing element and sliding sleeve slide together, and last needle tubing takes sealing element and sliding sleeve out of catheter block inner cavity, as shown in Figures 9 and 10, envelope
Slot seal has prevented blood and has overflowed pollution by blood back side opening, it is thus possible to remove needle operation calmly.
The not described part of the present embodiment is the same as example 1.
Claims (7)
1. the remaining needle with indwelling air cavity including conduit tube component, the barriers that are mounted on its inner cavity, punctures needle tubing and and needle tubing
Affixed operation handle, needle tubing front end are equipped with a tip inlets and puncture the side opening of observation blood back, and side opening is located at the rear of opening,
The distance between open front point and side opening aft terminal are pointed orifice distance, have lateral indwelling channel on catheter block, the channel with
Collateral aperture is mutually passed through between catheter block inner cavity, which is characterized in that there is air-chamber, barriers are set to the side in front of barriers
Branch aperture rear, collateral aperture rear end along with there is distance between barriers front end face, this distance for along end distance, this along end away from
From for 2.0-7.0mm, which is air-chamber, and barriers length is less than pointed orifice distance.
2. the remaining needle according to claim 1 with indwelling air cavity, which is characterized in that along end, distance is 3.0-4.0mm.
3. the remaining needle according to claim 1 with indwelling air cavity, which is characterized in that the conduit tube component at barriers rear
Inner cavity in be provided with a kind of sliding sleeve, a kind of sealing groove sealing element plug is located in sliding sleeve inner cavity, sealing element front end face and barrier
Part rear end face is close to, and sealing element rear end face and sliding sleeve inner sidewall patch are touched, and sliding sleeve periphery wall and conduit tube component internal chamber wall slide
And tool damping connection, sealing element are a kind of elastomers, needle tubing runs through the sealing element and sliding sleeve inner sidewall, the needle at side opening rear
A kind of annular convex clip of radial protrusion is provided on pipe, the intermediate bore dia for wearing needle tubing being arranged on sliding sleeve rear wall is between this
Between annular convex clip outer diameter and needle tubing outer diameter, barriers length is less than pointed orifice distance.
4. the remaining needle according to claim 3 with indwelling air cavity, which is characterized in that sealing element center is through needle tubing
Position is perhaps preset a gap and is run through convenient for needle tubing or longitudinal through there is a through-hole smaller than needle tubing outer diameter.
5. the remaining needle according to claim 3 with indwelling air cavity, which is characterized in that barriers length is opened greater than needle point
The length of mouth.
6. the remaining needle according to claim 3 with indwelling air cavity, which is characterized in that annular convex clip either one is flat
Shape or an olive shape.
7. with the remaining needle of indwelling air cavity according to claim 3 or 6, which is characterized in that annular convex clip rear end and needle
There is the transition of smooth slope shape between pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720933059.5U CN208389100U (en) | 2017-07-28 | 2017-07-28 | Remaining needle with indwelling air cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720933059.5U CN208389100U (en) | 2017-07-28 | 2017-07-28 | Remaining needle with indwelling air cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208389100U true CN208389100U (en) | 2019-01-18 |
Family
ID=65065424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720933059.5U Active CN208389100U (en) | 2017-07-28 | 2017-07-28 | Remaining needle with indwelling air cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208389100U (en) |
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2017
- 2017-07-28 CN CN201720933059.5U patent/CN208389100U/en active Active
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Effective date of registration: 20230904 Granted publication date: 20190118 |
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