CN200960351Y - Indwelling needle capable of preventing counter-flow effectively - Google Patents
Indwelling needle capable of preventing counter-flow effectively Download PDFInfo
- Publication number
- CN200960351Y CN200960351Y CN 200620115384 CN200620115384U CN200960351Y CN 200960351 Y CN200960351 Y CN 200960351Y CN 200620115384 CN200620115384 CN 200620115384 CN 200620115384 U CN200620115384 U CN 200620115384U CN 200960351 Y CN200960351 Y CN 200960351Y
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- Prior art keywords
- needle stand
- valve port
- cylindrical portion
- outer needle
- valve
- Prior art date
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- Expired - Lifetime
Links
- 239000008280 blood Substances 0.000 claims abstract description 11
- 210000004369 blood Anatomy 0.000 claims abstract description 11
- 241001415939 Corvus Species 0.000 claims description 27
- XSKZXGDFSCCXQX-UHFFFAOYSA-N thiencarbazone-methyl Chemical compound COC(=O)C1=CSC(C)=C1S(=O)(=O)NC(=O)N1C(=O)N(C)C(OC)=N1 XSKZXGDFSCCXQX-UHFFFAOYSA-N 0.000 claims description 27
- 238000009434 installation Methods 0.000 claims description 26
- 230000002411 adverse Effects 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 10
- 239000000523 sample Substances 0.000 claims description 3
- 238000001802 infusion Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 2
- 230000002146 bilateral effect Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 210000004761 scalp Anatomy 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001467 acupuncture Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229960002897 heparin Drugs 0.000 description 1
- 229920000669 heparin Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Images
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to an indwelling pin for effectively preventing the back flow, which relates to a medical transfusion instrument, and solves the defects of that the prior indwelling pin with a non-return valve can not prevent the back-flow of the blood for the reason that an opening of the non-return valve port can not be closed due to various reasons. The utility model comprises an outer pin, an outer pin base, an inner pin, an inner pin base and a non-return valve arranged in the outer pin base, wherein the non-return valve comprises a drum part, a crow mouth part comprising a bilateral symmetry wedge-shaped region on the front part of the drum part, an assembled part on the back of the drum part, the front end of the crow mouth part is provided with a valve port with a linear slot, wherein the involutory point forming the linear slot of the valve port comprises two involutory edge strips, characterized in that an enclosed construction which has acting force on the valve port is further provided, the acting force of the enclosed construction presses the involutory edge strips on the valve port for making the two edge strips joint more closely, thereby the closed power of the valve port is enhanced, and a non-closed opening of the valve port can not be produced, the back-flow of the blood is effectively prevented, the safety of the indwelling pin is greatly improved, and the utility model can be safely used in the epicranium fluid infusion.
Description
Technical field:
This utility model relates to a kind of medical infusion apparatus, relates to the remaining needle that effectively prevents adverse current particularly.
Background technology:
Pin and outer pin in remaining needle comprises, interior pin all adopts metal material to make in order to be with outer pin intravasation, and connects the inboard of outer pin, and outer pin is stayed in the blood vessel behind the intravasation, and interior pin is extracted.Usually the about central part of pin is equipped with valve for preventing reverse-flow outside, as No. 200420078043.3 disclosed anti-reverse mobile venous detaining needles of Chinese patent.The material of valve for preventing reverse-flow is the soft material of silica gel or rubber mass normally, if problem can take place in long-term keeping, naturalness can appear in its front end valve port can not cause adverse current by closed opening; Remaining needle is that hard metal is made in addition, interior in use pin must pass valve for preventing reverse-flow, interior pin extract the back its pass through part can form can not be closed opening, cause like this when venous pressure is higher than and form adverse current when tube for transfusion flows into the pressure of a side, and this pressure makes the liquid of tube for transfusion positive flow not go into the vein blood vessel just with formed opening closure when flowing into a little higher than venous pressure of a lateral pressure; In addition when the long or long situation of drop time of remaining needle indwelling time in blood vessel, valve port since closing force weak may cause can not be closed fully under pressure-less state through using repeatedly, if stilligout comes off or drop finishes blood back flow will take place in the drop, cause the danger of bleeding profusely, therefore existing reflux valve is because anti-adverse current ability, its application just is very limited, and more can not be applied in the scalp acupuncture (the scalp transfusion can not be used heparin).
Have again, general remaining needle is to be made of one with overcoat, the remaining needle that has valve for preventing reverse-flow is operated valve for preventing reverse-flow from the outside, what valve for preventing reverse-flow and overcoat used is soft and two kinds of resin materials of hard, therefore bonding has location dislocation or seepy question, and the bonding need time solidification, cause working performance low.
The utility model content:
This utility model solves the remaining needle of existing band valve for preventing reverse-flow because a variety of causes causes the valve for preventing reverse-flow valve port thereby the defective of blood back flow to occur can not closed opening can not effectively preventing, design a kind of built-in valve for preventing reverse-flow and can prevent valve port occur can not be closed opening, valve port closing force strong, can effectively prevent adverse current, safe remaining needle.The remaining needle that while this utility model provides can accurately be located with valve for preventing reverse-flow, location dislocation or seepy question can not occur, thereby can be as the scalp remaining needle, and Secure Application is infused in head.
Technology contents of the present utility model is such: the remaining needle that effectively prevents adverse current, comprise outer pin, outer needle stand, interior pin, interior needle stand, and the valve for preventing reverse-flow that is provided with in the outer needle stand, described valve for preventing reverse-flow is by cylindrical portion, the Corvus macrorhuchus mouth that constitutes by two symmetric tapered region in described cylindrical portion front portion and the installation portion at rear portion, the valve port that the front end of described Corvus macrorhuchus mouth cracks for band wire, described valve port forms linearity and opens the apposition position that meets and comprise two long limits that are involutory, it is characterized in that also comprising that its active force acts on increasing of described valve port and closes structure, the described active force that closes structure that increases pushes the long limit that described valve port is involutory, make two long limits closelyr involutory, thereby strengthen the closed strength of valve port.
Described increasing closes structure and is arranged on the described outer needle stand, and contacts with described valve for preventing reverse-flow valve body.
Described increasing closes structure and also can be increasing that valve for preventing reverse-flow Corvus macrorhuchus mouth forms and close structure, be that each tapered region of the described Corvus macrorhuchus mouth outside is two slopes, and in two slopes near the angle on cylindrical portion slope greater than angle near Corvus macrorhuchus mouth front end slope, bigger slightly than the angle of inner chamber, bigger than the thickness of close Corvus macrorhuchus mouth front end slope section near the thickness of cylindrical portion slope section near the angle in the Corvus macrorhuchus mouth leading section outside.
Describedly increase that to close structure be inboard symmetrically arranged two boss of outer needle stand, described two boss lay respectively at the pairing outer needle stand of the cylindrical portion outer wall corresponding site inboard of described valve for preventing reverse-flow, described cylindrical portion outer wall corresponding site is on the tangent line that parallels with the symmetry division face of linear valve port place valve for preventing reverse-flow on this cylindrical portion, distance between described two boss inboards is less than the external diameter of described cylindrical portion, make two boss apply equal pressure, increase the closed strength of the linear valve port that cracks described cylindrical portion outer wall corresponding site.
Describedly increase that to close structure be two symmetric column support arms that outer needle stand is connected with the installation portion of described valve for preventing reverse-flow and is provided with on the position, described column support arm can probe into the inboard corresponding site of cylindrical portion, the inboard corresponding site of described cylindrical portion be on this cylindrical portion with the intersection of the symmetry division face of linear valve port place valve for preventing reverse-flow on, distance between the described column support arm is greater than the cylindrical portion internal diameter, inboard this symmetric corresponding site of cylindrical portion of valve for preventing reverse-flow can be stretched, thereby increase the closed strength of the linear valve port that cracks.
Described two column support arms are probeing into slightly expanding outwardly foremost of cylindrical portion inboard for be arrangeding in parallel, form enlarged portion, and the distance between the enlarged portion of described two column support arms is greater than the internal diameter of cylindrical portion.And the enlarged portion of column support arm is deep into the Corvus macrorhuchus mouth in the cylindrical portion inboard.
Described valve for preventing reverse-flow installation portion also is respectively arranged with aligning structure with the connecting portion of outer needle stand, the breach that matches with this orientation direction angle that described aligning structure is respectively the orientation direction angle that is provided with on outside described needle stand and the position that described installation portion is connected and described installation portion setting, described breach is a V word breach; Described orientation direction angle and corresponding breach all are symmetrically arranged with two.
The diameter of described installation portion inner chamber is identical with described cylindrical portion intracavity diameter, and described installation portion wall thickness is greater than described cylindrical portion, and described aligning structure is arranged on the tail end of described installation portion; Described outer needle stand is provided with small column that described installation portion can closely be inserted in and joins diameter greater than the big column of small column with small column, and described column support arm is arranged on the front end of described small column; The terrace with edge that described big column and described small column form is provided with described aligning structure.
Described outer needle stand is made of the outer needle stand of preceding outer needle stand and back, and the outer needle stand of described preceding outer needle stand and described back is respectively arranged with the embedded structure that both are connected as a single entity.Described two boss are arranged on the inboard of described preceding outer needle stand, the arranged outside of revolving the position that turn 90 degrees at two boss needle stand outside preceding has two buttons, before outer needle stand is divided into before described, in, three parts in back, its front end is the vertebra shape, middle part and rear portion are cylindric cavity body structure, and the middle part also is cone-shaped structure with the anterior inner chamber part that is connected, but support and connection have the rustless steel funnel of outer pin, described two boss and button are arranged on the middle part, the rear portion of outer needle stand is and the back continual-connecting-part of outer needle stand before described, it is provided with four square holes, and the guiding groove of square hole is led in the needle stand rear end outside the place, inboard is provided with in the past; The outer needle stand in described back comprises the sealing of the described small column of front end, intermediary described big column and tail end, the outer wall of described big column is provided with four pawls that match with described four square holes, described sealing is cylindric cavity body structure, described sealing inner chamber front end is provided with anti-V word protuberance, the rear end is provided with two holes, be preferably square hole, its inner chamber front portion can be filled in for rubber blanket, stopper in install at the rear portion, there are two pawls the outside of stopper in described, and its center has one than the big hole of interior pin diameter.
Described valve for preventing reverse-flow is respectively rectangle in the transverse section at valve port position, and two rectangular one long limits are to being combined into straight line, and another long limit is the arc of indent slightly.
The back outer needle stand of needle stand is provided with branch pipe outside, and described branch pipe links to each other with tee T one mouth of pipe by flexible pipe, and two mouths of pipe in addition of described tee T are respectively transfusion connection tube and blood drawing connection tube.
Technique effect:
This utility model effectively prevents the remaining needle of adverse current, except that the parts and structure of routine, also comprise increasing and close structure, increase the two long limits that are involutory of closing that structure can form that linearity cracks to the valve port that the valve for preventing reverse-flow linearity is cracked and produce squeezing action, make two long limits closelyr closed, thereby strengthen the closed strength of valve port, firmly closed when valve port is closed, even the effect that has the interior pin of metallic character to pass linear valve port and long-time drop, valve port can not produce opening yet when closure.This increasing closes structure and comprises that directly special the increasing to the design of valve for preventing reverse-flow Corvus macrorhuchus mouth closes structure, various the increasing that makes the valve for preventing reverse-flow valve port produce the effect of tightening up that also is included in the inboard setting of outer needle stand closes structure, this utility model is owing to adopted the valve port limit that fits is played increasing of squeezing action and closed structure, strengthened the valve port closing force, can make valve port can not produce can not be closed opening, thereby effectively prevent adverse current, the safety of remaining needle is improved greatly, thereby can be used safely in the scalp transfusion.
This utility model closes the structure except setting increases, outer needle stand also is provided with the aligning structure that is connected with valve for preventing reverse-flow, and the installation portion of valve for preventing reverse-flow can tightly overlap on the small column of needle stand outside, make outer needle stand and valve for preventing reverse-flow no longer need binding agent just can accurately closely link together, do not have location dislocation or seepy question, the working performance of installation is improved greatly.
Outer needle stand be designed to can be chimeric each other former and later two outer needle stands, can assemble each parts that comprise valve for preventing reverse-flow easily.
Outer needle stand is provided with branch pipe, and described branch pipe links to each other with a tee T, and two mouths of pipe in addition of described tee T are respectively transfusion connection tube and blood drawing connection tube, and such structure can make under the situation that tube for transfusion is not pulled up and draw blood.
Description of drawings:
Fig. 1 is the structural representation of this utility model main body,
Fig. 1 ' is the structural representation of this utility model transfusion connection tube part;
Fig. 2 is a view of this utility model valve for preventing reverse-flow;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the vertical view of Fig. 2.
The specific embodiment:
Fig. 1 is the structural representation of this utility model most preferred embodiment.The remaining needle that effectively prevents adverse current shown in Figure 1 can be used as the transfusion that scalp acupuncture is used for head.The remaining needle of Fig. 1 comprises outer pin 1, outer needle stand 2, interior pin 3, interior needle stand 4, and the valve for preventing reverse-flow 5 that is provided with in the outer needle stand 2.Interior pin 3 is made of metal, and its rear portion and interior needle stand 4 usefulness binding agents are bonded as one; The syringe needle place of outer pin 1 forms a kind of sloping shape of releiving, so that it can level and smooth entering when skin is advanced in puncture, the rear portion of pin 1 is fixedly connected by stainless funnel institute outside, and it is coniform and cylindric that the rustless steel funnel has; Valve for preventing reverse-flow 5 comprises cylindrical portion 52 among Fig. 2, the Corvus macrorhuchus mouth 51 that constitutes by two symmetric tapered region in cylindrical portion 52 front portions and the installation portion 53 at rear portion, Corvus macrorhuchus mouth 51 profiles and Corvus macrorhuchus are approximate, also can be described as wedge structure portion, the front end of Corvus macrorhuchus mouth 51 is crack 511 valve port 512 of band wire among Fig. 4, valve port 512 forms linear opening and meets 511 apposition position to comprise the two long limits 513 that are involutory, 514 (see figure 3)s, this utility model comprises that especially also its active force acts on increasing of valve port 512 and closes structure, the described active force that closes structure that increases pushes the long limit 513 that valve port 512 shields mutually, 514, make two long limits 513,514 shield closelyr, to strengthen the closed strength of valve port; Valve port 512 forms linear opening and meets 511 apposition position to should be two long and narrow planes of screen mutually, and limit situation is at least the long limit of biphase screen.The front end face of visible valve port 512 is two slightly rectangular sections from a kind of structure of valve for preventing reverse-flow shown in Figure 3, when valve port 512 is closed two of section long limits 513,514 each other linearity shield mutually and close the circular arc that slightly concaves in the middle of pairing rectangular another long limit separately, this two long limit is.
See Fig. 1, outer needle stand 2 is difficult to aged material by good springiness and constitutes, and outer needle stand 2 is connected as a single entity by embedded structure by the outer needle stand in preceding outer needle guard 21 and back 22.Three parts before, during and after preceding outer needle stand 21 is divided into, its front end is the vertebra shape, middle part and rear portion are cylindric cavity body structure, and the middle part also is cone-shaped structure with the anterior inner chamber part that is connected, the outer pin that is connected with the rustless steel funnel embeds the front end of preceding outer needle stand 21, the cone-shaped structure of rustless steel funnel and inner chamber part coincide, and outer pin is fixed on the outer needle stand 21; Before the rear portion of outer needle stand 21 be and the continual-connecting-part 213 of the outer needle stand 22 in back that it is provided with the embedded structure that is made of four equally distributed square holes 214, locates to be provided with the guiding groove that square hole 214 is led in needle stand 21 rear ends outside the past in continual-connecting-part 21 3 inboards; The outer needle stand 22 in back comprises that the small column 221 of front end, intermediary diameter are than the big big column 222 of small column diameter and the sealing 223 of tail end, the outer wall of big column 222 is provided with four pawls 224 that match with four square holes 214, and sealing 223 is cylindric cavity body structure.
Valve for preventing reverse-flow 5 is made by the resin material softer than outer needle stand, the internal diameter of its installation portion 53 and cylindrical portion 52 can be identical, also can be bigger, but external diameter is greater than cylindrical portion 52, the diameter of installation portion 53 makes on its small column 221 that can very closely be enclosed within the outer needle stand 22 in back, the length of installation portion 53 equals or is slightly larger than the length of small column 221, is convenient to pack into small column 221 and up to joining with big column 222.Therefore valve for preventing reverse-flow 5 is installed on the front end small column 221 of the outer needle stand 22 in back, the outer needle stand 22 in back and preceding outside needle stand 21 be positioned at after chimeric preceding outside the rear portion and the middle part of needle stand 21.Installation portion 53 also is respectively arranged with aligning structure with the connecting portion of the outer needle stand 22 in back, described aligning structure can be respectively the breach 531 that matches with this orientation direction angle that is provided with on the orientation direction angle 225 that is provided with on the needle stand 22 and position that installation portion 53 is connected and installation portion 53 tail ends outside the back, the described breach of present embodiment is a V word breach, on big column 222 front ends that orientation direction angle 225 is arranged on the outer needle stand 22 in back and the step that small column 221 joins, orientation direction angle 225 all is symmetrically arranged with two with the breach 531 of correspondence.Owing to be provided with aligning structure, therefore the different outer needle stand 2 of soft durometer just can carry out accurate para-position with valve for preventing reverse-flow 5 and is connected, dislocation can not appear, and both have one section close-connected linkage section, can play good sealing function, no longer need to carry out bonding, save built-up time greatly, also avoided the inaccurate variety of issue that brings of para-position.
Described increasing closes two symmetric column support arms 226 that structure is connected with the installation portion 53 of valve for preventing reverse-flow 5 and is provided with on the position for the outer needle stand 22 in back, two column support arms 226 can probe into cylindrical portion 52 inboard corresponding sites, described cylindrical portion 52 inboard corresponding sites be on cylindrical portion 52 with the intersection 521 of the valve for preventing reverse-flow 5 symmetry division faces at linear valve port 512 places, on 522, distance between the two column support arms 226 is greater than the internal diameter of cylindrical portion 52, cylindrical portion 52 inboard these corresponding sites can be stretched, the two opposite side intersections 521 that can be stretched, 522 just is 512 liang long limits 513 of valve port, the valve for preventing reverse-flow at 514 places of two ends when closed divide equally plane and the crossing straight line of valve for preventing reverse-flow, see Fig. 2, thereby drive two long limits 513 of valve port 512,514 expand outwardly, make two long limits 513,514 is very tightly closed, increased the closed strength of the linear valve port that cracks.Being provided with of two column support arms 226 can be for be arrangeding in parallel, probeing into slightly expanding outwardly foremost of cylindrical portion 52 inboards, form enlarged portion, and the distance between the enlarged portion of two column support arms 226 can be triangle greater than the internal diameter of cylindrical portion 52 in its cross section of enlarged portion; Perhaps not in expansion foremost, and directly be that the diameter of two parallel column support arms 226 is bigger than the internal diameter of cylindrical portion 52; Two column support arms 226 can not be arranged in parallel yet but expand outwardly gradually, at the diameter of front end two column support arms 226 internal diameter greater than cylindrical portion 52.Preferably, the enlarged portion of two column support arms 226 is deep into Corvus macrorhuchus mouth 51 in cylindrical portion 52 inboards, can make valve port 512 closing forces stronger.
Described increasing closes structure and also can be and be arranged on the outer needle stand 2, and with the contacted structure of valve for preventing reverse-flow 5 valve bodies, at this moment, described increase close structure can be before symmetrically arranged two boss 215 in outer needle stand 21 middle parts inboards, two pairing preceding outer needle stand 21 inboards of cylindrical portion 52 outer wall corresponding sites that boss 215 lays respectively at valve for preventing reverse-flow 5, the tangent line 523 of described cylindrical portion 52 outer wall corresponding sites on cylindrical portion 52, paralleling with the valve for preventing reverse-flow 5 symmetry division faces at linear valve port 512 places, on 524, make 215 pairs of described cylindrical portion 52 outer wall corresponding sites of two boss apply to equal pressure, tangent line 523,524 because the extruding of boss 215 forms inner concavity, see Fig. 4, to increase the crack closed strength of valve port 512 of linearity.The arranged outside of revolving the position that turn 90 degrees at two boss 215 needle stand 21 outside preceding has two reverse-current switch 216, when needs are drawn blood, press two reverse-current switch 216, blood is extracted out, the wall at outer needle stand 2 positions that are connected with reverse-current switch 216 designs very thinly, and its thinness still can guarantee to press the back can reinstatement by its material self elastic force.
Described increasing closes structure and also can be increasing that valve for preventing reverse-flow 5 Corvus macrorhuchus mouths 51 form and close structure, see Fig. 4, be that each tapered region of described Corvus macrorhuchus mouth 51 outsides is two slopes 515,516, and in two slopes 515,516 near the angle on the slope 516 of cylindrical portion 52 greater than angle near Corvus macrorhuchus mouth front end slope 515, bigger slightly than the angle of inner chamber near the angle in the Corvus macrorhuchus mouth 51 leading sections outside, bigger than the thickness on 515 sections on close Corvus macrorhuchus mouth 51 front end slopes near the thickness on 516 sections on the slope of cylindrical portion 52, this double slanted structure can be strengthened valve port 512 closed strength.
Outer needle stand 22 sealings 223 in back are cylindric cavity body structure among Fig. 1, its inner chamber front end is provided with anti-V word protuberance 227, the rear end is provided with two holes, be preferably square hole, its inner chamber front portion can be filled in for rubber blanket, and columnar interior stopper 6 is installed at the rear portion, there are two pawls the outside of interior stopper 6, to match with the hole of sealing 223 rear ends, the center of interior stopper 6 has one than the big hole of interior pin 3 diameters, inserts with pin in guiding.
The outer needle stand 22 in back is provided with branch pipe 7, branch pipe 7 links to each other with tee T 8 one mouths of pipe by flexible pipe 71 among Fig. 1 ', two mouths of pipe in addition of tee T 8 are respectively transfusion connection tube 81 and blood drawing connection tube 82, transfusion connection tube 81 is a cylinder-like structure with the coupling part of tube for transfusion, be provided with the protuberance of falling V 83 in it, arranged outside has two pawls 84, and revolving the position that turn 90 degrees from the position of pawl 84 has two guide lines.Put into rubber blanket 85 in the cylinder of transfusion connection tube 81, cylinder sleeve has circular lid 86, circular lid 86 has two square holes that match with two pawls 84, revolve the position that turn 90 degrees from its inboard square hole position the wire groove is arranged, there is a hole bigger than transfusion needle diameter at the center of circular lid 86, as the bullport of transfusion needle.
Claims (10)
1, effectively prevent the remaining needle of adverse current, comprise outer pin, outer needle stand, interior pin, interior needle stand, and the valve for preventing reverse-flow that is provided with in the outer needle stand, described valve for preventing reverse-flow comprises cylindrical portion, the Corvus macrorhuchus mouth that constitutes by two symmetric tapered region in described cylindrical portion front portion and the installation portion at rear portion, the valve port that the front end of described Corvus macrorhuchus mouth cracks for band wire, described valve port forms the apposition position that linearity cracks and comprises two long limits that are involutory, it is characterized in that also comprising that its active force acts on increasing of described valve port and closes structure, the described active force that closes structure that increases pushes the long limit that described valve port is involutory, make two long limits closelyr involutory, thereby strengthen the closed strength of valve port.
2, the remaining needle that effectively prevents adverse current according to claim 1, it is characterized in that describedly increasing that to close structure be inboard symmetrically arranged two boss of outer needle stand, described two boss lay respectively at the pairing outer needle stand of the cylindrical portion outer wall corresponding site inboard of described valve for preventing reverse-flow, described cylindrical portion outer wall corresponding site is on the tangent line that parallels with the valve for preventing reverse-flow symmetry division face at linear valve port place on this cylindrical portion, make two boss apply equal pressure, increase the closed strength of the linear valve port that cracks described cylindrical portion outer wall corresponding site.
3, the remaining needle that effectively prevents adverse current according to claim 1, it is characterized in that describedly increasing that to close structure be two symmetric column support arms that outer needle stand is connected with the installation portion of described valve for preventing reverse-flow and is provided with on the position, described column support arm can probe into the inboard corresponding site of cylindrical portion, the inboard corresponding site of described cylindrical portion be on this cylindrical portion with the intersection of the valve for preventing reverse-flow symmetry division face at linear valve port place on, distance between the described column support arm is greater than the cylindrical portion internal diameter, the inboard corresponding site of described cylindrical portion can be stretched, thereby increase the closed strength of the linear valve port that cracks; Described two column support arms are probeing into slightly expanding outwardly foremost of cylindrical portion inboard for be arrangeding in parallel, form enlarged portion, and the distance between the enlarged portion of described two column support arms is greater than the internal diameter of cylindrical portion.
4, the remaining needle that effectively prevents adverse current according to claim 3 is characterized in that the enlarged portion of column support arm is deep into the Corvus macrorhuchus mouth in the cylindrical portion inboard.
5, the remaining needle that effectively prevents adverse current according to claim 1, it is characterized in that described increasing closes structure and also can be increasing that valve for preventing reverse-flow Corvus macrorhuchus mouth forms and close structure, be that each tapered region of the described Corvus macrorhuchus mouth outside is two slopes, and in two slopes near the angle on cylindrical portion slope greater than angle near Corvus macrorhuchus mouth front end slope, bigger slightly than the angle of inner chamber, bigger than the thickness of close Corvus macrorhuchus mouth front end slope section near the thickness of cylindrical portion slope section near the angle in the Corvus macrorhuchus mouth leading section outside.
6, the remaining needle that effectively prevents adverse current according to claim 1, it is characterized in that the described valve for preventing reverse-flow installation portion and the connecting portion of outer needle stand also are respectively arranged with aligning structure, the breach that matches with this orientation direction angle that described aligning structure is respectively the orientation direction angle that is provided with on outside described needle stand and the position that described installation portion is connected and described installation portion setting, described breach is a V word breach; Described orientation direction angle and corresponding breach all are symmetrically arranged with two.
7, the remaining needle that effectively prevents adverse current according to claim 6 is characterized in that described aligning structure is arranged on the tail end of described installation portion; Described outer needle stand is provided with small column that described installation portion can closely be inserted in and joins diameter greater than the big column of small column with small column, and described column support arm is arranged on the front end of described small column; The terrace with edge that described big column and described small column form is provided with described aligning structure.
8, according to the described remaining needle that effectively prevents adverse current of one of claim 1-7, it is characterized in that described outer needle stand is made of the outer needle stand of preceding outer needle stand and back, the outer needle stand of described preceding outer needle stand and described back is respectively arranged with the embedded structure that both are connected as a single entity.
9, the remaining needle that effectively prevents adverse current according to claim 8, it is characterized in that described before outer needle stand be divided into before, during and after three parts, its front end is the vertebra shape, middle part and rear portion are cylindric cavity body structure, and the middle part also is cone-shaped structure with the anterior inner chamber part that is connected, the rear portion of outer needle stand is and the continual-connecting-part of the outer needle stand in back before described, and it is provided with the embedded structure that is made of four square holes, and the guiding groove of square hole is led in the needle stand rear end outside the place, inboard is provided with in the past; The outer needle stand in described back comprises the sealing of the described small column of front end, intermediary described big column and tail end, the outer wall of described big column is provided with four pawls that match with described four square holes, described sealing is cylindric cavity body structure, its inner chamber front end is provided with anti-V word protuberance, and the rear end is provided with two holes, is preferably square hole, its inner chamber front portion can be filled in for rubber blanket, stopper in install at the rear portion, there are two pawls the outside of described interior stopper, and its center has one than the big hole of interior pin diameter.
10, the remaining needle that effectively prevents adverse current according to claim 1 and 2, it is characterized in that described outer needle stand is provided with branch pipe, described branch pipe links to each other with tee T one mouth of pipe by flexible pipe, and two mouths of pipe in addition of described tee T are respectively transfusion connection tube and blood drawing connection tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620115384 CN200960351Y (en) | 2006-05-25 | 2006-05-25 | Indwelling needle capable of preventing counter-flow effectively |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620115384 CN200960351Y (en) | 2006-05-25 | 2006-05-25 | Indwelling needle capable of preventing counter-flow effectively |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200960351Y true CN200960351Y (en) | 2007-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620115384 Expired - Lifetime CN200960351Y (en) | 2006-05-25 | 2006-05-25 | Indwelling needle capable of preventing counter-flow effectively |
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| Country | Link |
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| CN (1) | CN200960351Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103285450A (en) * | 2013-03-25 | 2013-09-11 | 南通恒泰医疗器材有限公司 | Multifunctional indwelling needle |
| CN104162202A (en) * | 2014-06-10 | 2014-11-26 | 丁培琪 | Reverse-flowing-prevention venous indwelling needle |
| CN108355225A (en) * | 2018-01-24 | 2018-08-03 | 山东百多安医疗器械有限公司 | A kind of ductus venosus and preparation method thereof with the dual anti-valve that backflows |
| CN108403128A (en) * | 2018-03-24 | 2018-08-17 | 曹春荣 | A kind of venous samples acquisition valve for preventing reverse-flow device and blood lancet device |
-
2006
- 2006-05-25 CN CN 200620115384 patent/CN200960351Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103285450A (en) * | 2013-03-25 | 2013-09-11 | 南通恒泰医疗器材有限公司 | Multifunctional indwelling needle |
| CN104162202A (en) * | 2014-06-10 | 2014-11-26 | 丁培琪 | Reverse-flowing-prevention venous indwelling needle |
| CN108355225A (en) * | 2018-01-24 | 2018-08-03 | 山东百多安医疗器械有限公司 | A kind of ductus venosus and preparation method thereof with the dual anti-valve that backflows |
| CN108403128A (en) * | 2018-03-24 | 2018-08-17 | 曹春荣 | A kind of venous samples acquisition valve for preventing reverse-flow device and blood lancet device |
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