CN201543057U

CN201543057U - Blood-return prevention infusion set

Info

Publication number: CN201543057U
Application number: CN2009201498752U
Authority: CN
Inventors: 戎静华
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-23
Filing date: 2009-04-21
Publication date: 2010-08-11
Anticipated expiration: 2019-04-21

Abstract

The utility model discloses a blood-return prevention infusion set which comprises a bottle stopper puncture set, an infusion tube, a Murphy's tube with the lower part made of hard plastic, a floating plug provided with an inverted cone ring body and an annular cylinder in the Murphy's tube, made of a flexible sealant in a sealed position, and provided with the sealed outer surface, a flow regulator, an outer conical joint, a small infusion tube and an intravenous injection needle. The blood-return prevention infusion set has the auto-stop function when the infusion is finished, the blood return is avoided; both the sinking and the floating functions of the floating plug can be automatically performed; the floating plug floats quickly, and on a quick intravenous drip, the infusion is not stopped; the lower parts of the floating plug and the Murphy's tube are made of materials with different arm expansion coefficients, which overcomes potential safety hazards of poor sealing of the floating plug caused by the different changes of the size between the floating plug and the Murphy's tube due to temperature change; and through the design of the floating plug in shape and size, the potential safety hazards of poor sealing of the floating plug caused by stranding in falling process due to various reasons are overcome.

Description

A kind of blood return preventing infusion device

[affiliated technical field]

This utility model relates to disposable infusion set, is particularly useful for disposable use blood return preventing infusion device.

[background technology]

Present transfusion set, it is by bottle plug puncture unit, tube for transfusion, the Mo Feishi pipe, flow regulator, the outer cone joint, the primary infusion pipe, intravenous needle is formed.Because it does not have blood return preventer, thus when medicine liquid droplet to the greatest extent after, if nurse improperly, will make the tube for transfusion below the air admission Mo Feishi pipe, and produce the blood back phenomenon.If blood and air meet, will produce thrombosis, thereby cause the generation of some adverse consequencess, also cause conflict between doctors and patients easily.

[summary of the invention]

In order to overcome the above-mentioned deficiency of present general infusion set, the utility model proposes a kind of new blood return preventing infusion device.It is provided with the floating plug device in the Mo Feishi pipe, after medicine liquid droplet was most, floating plug can descend with the decline of medicinal liquid liquid level, from movable sealing Mo Feishi pipe, prevents that the medicinal liquid water level from descending, and avoided the generation of blood back phenomenon.Heavy, the floating function of floating plug all is to realize automatically, need not manual intervention.Floating plug hollow, density is little, and volume is big, is enough to anti-straight line drop, and guarantees ascent rate.By the special size design of floating plug, in the normal infusion process and under the various contingent situation, the state, the transfusion device that are in knockdown as the Mo Feishi pipe transport way moderately gusty air etc., can both guarantee that floating plug is in decline, can be not stranded, rollover or tipping, cause the sealing function forfeiture.The blow-by phenomenon that the Mo Feishi pipe causes because of the material coefficient of expansion is different in the time of can overcoming variations in temperature with the sealing position configuration design of floating plug.

A kind of blood return preventing infusion device of this utility model, it comprises: bottle plug puncture unit, tube for transfusion, Mo Feishi pipe, the floating plug in the Mo Feishi pipe, flow regulator, the outer cone joint, primary infusion pipe, intravenous needle, it is characterized in that: a rounding platform ring body is arranged at the bottom of Mo Feishi pipe, and the bottom of floating plug is a rounding platform ring body that bottom surface is sealed; Mo Feishi manages the rounding platform ring body bottom and the floating plug bottom, and their bus equates with the angle value of its axis; The maximum inner diameter of the bottom of each overall diameter＜Mo Feishi pipe of the bottom of the minimum interior diameter＜floating plug of the bottom of Mo Feishi pipe; The top of Mo Feishi pipe is a circle ring column that is closed up in the upper end, the top of floating plug is upwardly extending from the maximum gauge of its bottom, and be the folded mutually successively body that forms of a lot of anchor rings of axis with the extension of the axis of its bottom, wherein the largest outer diameter on floating plug top equals the interior diameter of the largest outer diameter of its bottom less than Mo Feishi pipe circle ring column position, top, and the upper bottom surface of floating plug seals; The top of floating plug is after the lower seal of bottom with the Mo Feishi pipe of floating plug, and the point that the point of any one in the top of floating plug is all got along well on the Mo Feishi inside pipe wall overlaps; The outer surface of whole floating plug all seals; The outer volume on floating plug top multiply by the quality that the density of water is subjected to greater than whole floating plug; The height of the floating plug the when height of floating plug should equal the interior diameter at circle ring column position on Mo Feishi pipe top greater than: the external diameter of a circle of the central longitudinal sectional view of floating plug; The height of floating plug should greater than: when knockdown takes place in Mo Feishi pipe, floating plug in decline, the floating plug maximum height in the time of phenomenon on the Mo Feishi inside pipe wall can occurring being stuck; The upper and lower of Mo Feishi pipe connects by mutual belled mode.

As preferably: in floating plug, bottom surface is sealed up by the thin rounding stage body of a height, and upper bottom surface is sealed up by the thin cylinder of a height, and floating plug top is except upper bottom surface, and other position all is a circle ring column.

Further preferred: the top of Mo Feishi pipe be one in the upper end by the circle ring column of the thin circle ring column closing in of height that joins at place, centre and tube for transfusion connector.

Further preferred: the top of Mo Feishi pipe is a circle ring column that is closed up by a round platform ring body that is connected with the tube for transfusion connector at the place, centre in the upper end.

Further preferred: the top of Mo Feishi pipe is a circle ring column that is closed up by a semi-round ball ring body that is connected with the tube for transfusion connector at the place, centre in the upper end.

Further preferred: when: the bottom of floating plug is the rounding platform ring body that a bottom surface is sealed up by the thin rounding important actor of a height, top is the circle ring column that a upper bottom surface is sealed up by the thin cylinder of a height, and a rounding platform ring body is arranged at the bottom of Mo Feishi pipe, top be one in the circle ring column that is closed up in the upper end, the height at the circle ring column position of floating plug should be simultaneously greater than following two numerical value: the outer radius at the circle ring column position of the quality/floating plug of 1 whole floating plug square * density of pi * water; Overall diameter * the sin at the circle ring column position of the interior diameter-floating plug at the circle ring column position of 2[Mo Feishi pipe (bus at the rounding platform ring body position of 90 °-floating plug and the angle value of its axis)]/cos (bus at the rounding platform ring body position of 90 °-floating plug and the angle value of its axis).

Further preferred: upper and lower two parts of floating plug do not connect part, are one-time formed.

Further preferred: floating plug forms by upper and lower two-section attaching, and is the interface of the upper and lower two-section of floating plug with the anchor ring at the upper and lower two-part interface place of floating plug.

Further preferred: floating plug forms by upper and lower two-section attaching, it is divided into two sections to the top of floating plug, epimere links to each other with the top, and the bottom of hypomere and floating plug links to each other, and is the interface of the upper and lower two-section of floating plug with the interface of another section in wherein a section and the floating plug top in the floating plug top.

Further preferred: in floating plug, to be divided into the innner and outer two-layer removing that part of behind the floating plug bottom surface in the floating plug bottom, and its ectomesoderm is close to and is nested with outside nexine, and nexine extends to form the bottom surface of floating plug downwards, extends upward to form floating plug top.

Further preferred: in floating plug, that section below following section from floating plug top removed that part of behind the bottom surface in the bottom of floating plug, and to be divided into the innner and outer two-layer, its ectomesoderm is close to and is nested with outside nexine, and nexine extends to form the bottom surface of floating plug downwards, extends upward be left in the top that forms floating plug that part of.

Further preferred: the outside of Mo Feishi pipe is not provided with the overcoat box.

Further preferred: the outside of Mo Feishi pipe is provided with an overcoat box that it is covered.

Further preferred: the Mo Feishi pipe be by the upper end at rounding platform ring body position extend upward an interior diameter consistent with the interior diameter at circle ring column position and the longitudinal section be one below high, the bottom is at the torus of the right-angled trapezium of inboard, middle and lower part in this toric outside, stretch out again extension with the bus of rounding platform ring body is a hypotenuse, with the ring wall thickness of the circle ring column of Mo Feishi pipe is that the longitudinal section of the length of top right-angle side is the ring body of inverted right angled triangle, lower end at the circle ring column position is downward along the size and dimension of the outer surface of the extension of Mo Feishi pipe bottom, stretch out, extend to till the top right-angle side place of this triangle ring body always, realize on the Mo Feishi pipe, two-part connection down.

Further preferred: on the Mo Feishi pipe, following two ones extend upward an annulus post by the upper end at the rounding platform ring body position of Mo Feishi pipe, the annulus post groove of a hollow of the recessed formation of the top end surface of this annulus post, in this annulus post groove, in the circle ring column position on the size of overall diameter and Mo Feishi pipe top, the consistent size of overall diameter, just allow the Mo Feishi pipe the circle ring column position the lower end sleeve wherein, simultaneously in the extending part at rounding platform position, extended upward one by sleeve again circle ring column position the inside that part of and make the inwall of Mo Feishi pipe keep smooth fluent circular arc ring, realize on the Mo Feishi pipe, two-part connection down.

The beneficial effects of the utility model are: 1): have the blood return prevention function.Because floating plug descends in the back to the greatest extent decline with the medicinal liquid liquid level of medicine liquid droplet, the outer surface of floating plug all seals, the rounding platform ring body that the bottom of floating plug and Mo Feishi pipe all has the angle value of bus and its axis to equate; The maximum inner diameter of each overall diameter of the minimum interior diameter＜floating plug bottom of Mo Feishi pipe bottom＜Mo Feishi pipe bottom; The outer surface of floating plug all seals; In the bottom of floating plug, contact surface at the position that coincide with Mo Feishi pipe bottom uses the sealing flexible glue of the special use of the disposable use that meets standards of pharmacopoeia " annotate, defeated class " medical apparatus and instruments to make, and the rounding platform ring body position of Mo Feishi pipe uses the duroplasts of the special use of the disposable use that meets standards of pharmacopoeia " annotate, defeated class " medical apparatus and instruments to make.So dropped to the rounding platform ring body position of Mo Feishi pipe bottom when floating plug after, just the Mo Feishi seal of tube is got up, air can't be entered, thereby make medicinal liquid maintain constant height, so blood can not enter tube for transfusion through intravenous needle, avoided the blood back phenomenon.2): floating plug is realized come-up and sealing automatically.The outer volume at the circle ring column position of floating plug multiply by the density of water greater than whole floating plug quality, and on earth because quality equals gravity, and after the bottom of floating plug is the lower seal of Mo Feishi pipe, the top of the top of floating plug and Mo Feishi pipe without any eclipsed point, and in reality, medicinal liquid density is all big than water, so when medicinal liquid enters in the Mo Feishi pipe, after the circle ring column position submergence with floating plug, floating plug just must break away from seal automatically, realize come-up, and do not need to adopt other operation and power.3): the floating plug come-up is quick.Because the circle ring column position of floating plug has arranged a large amount of water, so the Mo Feishi pipe only need be introduced the medicinal liquid of trace in it, medicinal liquid just can all flood the circle ring column position of floating plug, just can realize come-up.Because after the come-up of rounding platform ring body position with floating plug of floating plug, it has just only contacted with medicinal liquid again, so it also arranges medicinal liquid, and has obtained buoyancy, the floating plug come-up is accelerated, and finishes the process of come-up at once.4): anti-straight line drop.Floating plug, is lived the lower seal of Mo Feishi pipe, and the phenomenon that transfusion stops to be occurred so even infuse under straight line drop situation, floating plug is swept away because the buoyancy that is subjected to is big, can satisfy so not occur accident when rescuing the dehydration patient.5): the size design on the floating plug height has guaranteed the security of operation of floating plug, has stopped potential safety hazard.When the circle ring column position of Mo Feishi pipe and the angle value between the horizontal plane greater than, equaling " 90 degree deduct the bus at rounding platform ring body position of floating plug and the angle value of its axis " time infuses, if the insufficient height at the circle ring column position of floating plug, will make the height on the circle ring column position inwall of bus of a side at rounding platform ring body position of floating plug and Mo Feishi pipe folded mutually, will cause floating plug by on the inwall at stranded circle ring column position at the Mo Feishi pipe, perhaps by between the inwall at the inwall at stranded circle ring column position at the Mo Feishi pipe and rounding platform ring body position, and make floating plug can't realize sealing the function of Mo Feishi pipe.Through experiment with calculate: when the height at the circle ring column position of floating plug greater than following numerical value, promptly during [overall diameter * sin at the interior diameter at the circle ring column position of Mo Feishi pipe-floating plug circle ring column position (bus at the rounding platform ring body position of 90 °-floating plug and the angle value of its axis)]/cos (bus at the rounding platform ring body position of 90 °-floating plug and the angle value of its axis), floating plug just can not produce above-mentioned stranded phenomenon in the process that falls, also satisfied simultaneously described in the independent claims of this patent: the height of the floating plug the when height of floating plug should equal the interior diameter at circle ring column position on Mo Feishi pipe top greater than: the external diameter of a circle of the central longitudinal sectional view of floating plug; Avoided floating plug in transfusion device is transported or is used, the rollover or the tipping in the Mo Feishi pipe of generation.6): the sealing property of floating plug is superior.This utility model spy is designed to rounding platform ring body rather than semi-round ball ring body with the shape that Mo Feishi manages the main position of bottom and floating plug bottom.Make the identical sealing at the rounding platform ring body position of the rounding platform ring body position of floating plug and Mo Feishi pipe, be not subjected to the different material coefficients of expansion can discrepant the influence.Because their buses of two with the angle value of axis be identical, again because the maximum inner diameter of each overall diameter of the minimum interior diameter＜floating plug bottom of Mo Feishi pipe bottom＜Mo Feishi pipe bottom, so in different materials expands variation, though make the variation coefficient of the overall diameter of floating plug bottom and the interior diameter that Mo Feishi manages the bottom unequal, but floating plug can move by upper and lower, makes their sealing effectiveness unaffected.If the bottom of Mo Feishi pipe and floating plug is designed to the semi-round ball ring body, when variations in temperature, because make the expansion rate or the shrinkage factor difference of material separately, make the interior diameter of semi-round ball ring body of the bottom of Mo Feishi pipe be not equal to the overall diameter of the semi-round ball ring body of floating plug bottom, the effect of this position sealing is affected.7): the shape of floating plug bottom not only had been not easy to take place stranded but also had avoided the waste of material.This utility model spy is designed to rounding platform ring body rather than circular cone ring body to the shape at the main position of Mo Feishi pipe bottom and floating plug bottom.Because this utility model utilizes the gravity principle transfusion, so the most reasonable in being connected with tube for transfusion bottom of Mo Feishi pipe.So can only be designed to the round platform ring cylinder to this position of Mo Feishi pipe, if and the shaped design of floating plug bottom is become the circular cone ring body, so when sealing, one section connector that will insert Mo Feishi pipe and tube for transfusion on the band pinnacle on the floating plug circular cone ring body position, so one section of that band pinnacle cuts little ice, so so just wasted the making material.And moreover, if after certain inclination takes place the Mo Feishi pipe, floating plug circular cone ring body position is in the process that falls, and its pinnacle is difficult to guarantee accurately to insert in the connector of the following tube for transfusion of Mo Feishi pipe, floating plug is lived by stranded, make it can't seal the Mo Feishi pipe.8): the floating plug shaped upper part designs not only economical with materials but also makes it have movement locus preferably when come-up, helps come-up.The upper design of floating plug becomes circle ring column, it is the scheme of making material of saving most under the situation that obtains equal buoyancy, and make floating plug in the process of come-up, center of gravity is more steady, prevent that it from hitting that to make its continual generation serve as the swing of making a circulation of swing initial point with its center of gravity because of when come-up because constantly be subjected to down dripping of drops physic liquor, avoided the influence to the ascent rate of floating plug of clashing into constantly because of floating plug that the inwall of Mo Feishi pipe causes.9): the manufacture method on Mo Feishi pipe top has guaranteed that card pipe phenomenon can not appear in floating plug in floating-upward process.Because the overall diameter at floating plug circle ring column position equals the interior diameter of the largest outer diameter of floating plug bottom less than Mo Feishi pipe top cylinder ring body region, in the time of can avoiding under normal circumstances using, card pipe phenomenon can not appear in the come-up of floating plug in the Mo Feishi pipe.In addition, again because or use the disposable use that meets standards of pharmacopoeia " annotate, defeated class " medical apparatus and instruments on the top of Mo Feishi pipe, and when its for a long time by hard thing compressing distortion, after extrudate is cancelled, its flexible plastic that resiles is made; Perhaps use the disposable use that meets standards of pharmacopoeia " to annotate; defeated class " special use of medical apparatus and instruments on the top of Mo Feishi pipe, when it is out of shape by hard thing compressing for a long time, after extrudate is cancelled, when its flexible plastic that resiles is made, being nested with one in its outside can open, the overcoat box that the duroplasts that takes off is made, the top that just can avoid the Mo Feishi pipe is because of in the process that betransported at transfusion device or store, for a long time by the hard continual extruding of thing, when extrudate is undone suddenly, the phenomenon that Mo Feishi pipe top can not resile at once and card pipe phenomenon that floating plug is occurred in the process of come-up.

[description of drawings]

Fig. 1 is diagram one of the present utility model

Fig. 2 is diagram two of the present utility model

Fig. 3 is diagram three of the present utility model

Fig. 4 is diagram four of the present utility model

Fig. 5 is diagram five of the present utility model

[specific embodiment]

A kind of blood return preventing infusion device as described in Figure 1: bottle plug puncture unit 1 connects tube for transfusion 2, tube for transfusion 2 connects Mo Feishi pipe 3, the top of Mo Feishi pipe 3 is one and is joined the circle ring column 3a of the circle ring column 3c closing in that height is thin at place, centre and tube for transfusion connector 3d by one in the upper end.A rounding platform ring body 3b is arranged at the bottom, wherein the bottom of Mo Feishi pipe 3 uses disposable use " notes, defeated class " the special-purpose duroplasts of medical apparatus and instruments that meets standards of pharmacopoeia to make, the disposable use that meets standards of pharmacopoeia " annotate, defeated class " medical apparatus and instruments special use is used on Mo Feishi pipe top, and, it is forced to distortion when being subjected to hard thing extruding for a long time, after its hard thing of extruding is cancelled, its high-elastic flexible plastic that at once resiles is made.

Mo Feishi pipe 3 be by the upper end at rounding platform ring body position 3b extend upward an interior diameter consistent with the interior diameter of circle ring column position 3a and the longitudinal section be one below high, the bottom is at the torus of the right-angled trapezium of inboard, middle and lower part in this toric outside, stretch out again extension with the bus of rounding platform ring body position 3b is a hypotenuse, with the ring wall thickness of the circle ring column position 3a of Mo Feishi pipe 3 is that the longitudinal section of the length of top right-angle side is the ring body of inverted right angled triangle, lower end at circle ring column position 3a is downward along the extension that Mo Feishi manages 3 bottoms, stretch out, extend to till the top right-angle side place of this triangle ring body always, realize on the Mo Feishi pipe 3, two-part connection down.

In Mo Feishi pipe 3 floating plug 4 is set, a circle ring column position 4a that floating plug 4 is sealed up by the thin cylinder of a height by the upper bottom surface on top and a rounding platform ring body position 4b who is sealed up by the thin rounding stage body of a height of bottom form.The outer surface of floating plug 4 all seals.

Whole floating plug 4 has all used the sealing flexible glue of disposable use " notes, defeated class " the medical apparatus and instruments special use that meets standards of pharmacopoeia to make.

In floating plug 4 and the Mo Feishi pipe 3, the inside and outside diameter of their upper and lower part satisfies following relation: the largest outer diameter＜Mo Feishi of the bottom of the overall diameter=floating plug 4 on floating plug 4 tops manages the interior diameter of the circle ring column position 3a on 3 tops; Each overall diameter＜Mo Feishi that Mo Feishi manages minimum interior diameter＜floating plug 4 bottoms of 3 bottoms manages the maximum inner diameter of 3 bottoms.

The height of the circle ring column position 4a of floating plug 4 should satisfy simultaneously: 1: greater than: [overall diameter * sin (bus of the rounding platform ring body position 4b of 90 °-floating plug (4) and the angle value of its axis) of the circle ring column position 4a of interior diameter-floating plug (4) of the circle ring column position 3a of Mo Feishi pipe 3]/cos (bus of the rounding platform ring body position 4b of 90 °-floating plug (4) and the angle value of its axis); 2: greater than: the outer radius of the circle ring column position 4a of the quality/floating plug of whole floating plug 4 (4) square * density of pi * water.

The following direct connection tube for transfusion 2 of the rounding platform ring body position 3b of Mo Feishi pipe 3, the outside of this tube for transfusion 2 is nested with flow regulator 5, the tail end of this tube for transfusion 2 connects outer cone joint 6, or connect below the outer cone joint 6 and can disconnect the primary infusion pipe (2a) that sleeve is lived, connect intravenous needle 7 below the primary infusion pipe 2a.

During operation, bottle plug puncture unit 1 is punctured in the top infusion bottle, transfusion device has been erected thereupon, and this moment, floating plug 4 dropped to the 3b place, rounding platform ring body position of the bottom of Mo Feishi pipe 3 automatically, and the lower seal of Mo Feishi pipe 3 is lived.The circle ring column position 3a of extruding Mo Feishi pipe 3, the air in the Mo Feishi pipe 3 will upwards be arranged, and top medicinal liquid is introduced within the Mo Feishi pipe 3.When medicinal liquid was introduced in the Mo Feishi pipe 3, it very fast to falling, had accounted for most horizontal position because floating plug 4 is managed in 3 at Mo Feishi again, so in moment, medicinal liquid just floods the circle ring column position 4a of floating plug 4 fall with linear speed.Because the outer volume of the circle ring column position 4a of floating plug 4 multiply by the gravity that the density of water is subjected to greater than whole floating plug 4, so surpassed the top of circle ring column position 4a of floating plug 4 when the liquid level one of medicinal liquid after, just see that floating plug 4 rises automatically, because the top of floating plug 4 is circle ring column position 4a, so center of gravity can be very steady during its come-up, can not occur influencing the ascent rate of floating plug 4 so that its constantly clashes into the inwall of Mo Feishi pipe 3 in floating-upward process because the continual center of gravity with it of hitting and taking place of dripping that is subjected to down drops physic liquor serves as to swing the circuitous continuous dancing of initial point.After floating plug 4 rises, go to rising at faster speed again because floating plug 4 is not when rising, the rounding platform ring body position 4b of floating plug 4 only and Mo Feishi manage 3 and contact.After rising, just only contacted, so it also has been subjected to buoyancy because of having arranged medicinal liquid with medicinal liquid.So the rising of floating plug 4 and wafing to liquid level has only been finished work in moment.After floating plug 4 is opened, draw under the medicinal liquid quilt, a large amount of air in the transfusion device is passed downwards by the medicinal liquid of arranging down, observe in the last only remaining Mo Feishi pipe 3 and drip that part of of fast usefulness, remaining all is discharged from transfusion device, after intravenous needle 7 punctures well, mix up flow regulator 5, transfusion enters normal operating conditions.

Because the buoyancy that floating plug 4 obtains is big, so it can resist the straight line drop of when transfusion medicinal liquid, can not make floating plug 4 because be subjected to the impulsive force of medicinal liquid, and make floating plug 4 sinking of falling, the rounding platform ring body position 3b of Mo Feishi pipe 3 is sealed up, and make the transfusion process that phenomenon take place to stop.

After medicine liquid droplet is most, floating plug 4 descends with the decline of medicinal liquid water level, last floating plug 4 arrives the 3b place, rounding platform ring body position of Mo Feishi pipe 3, rounding platform ring body position 4b with floating plug 4 seals up it, make the tube for transfusion 2 of air below can't entering by rounding platform ring body position 3b through Mo Feishi pipe 3, and make Mo Feishi manage 3 following tube for transfusions 2, and all occupied in other the parts below it by medicinal liquid, make and kept the enough pressure that overcomes venopressor medicinal liquid fluid column in the transfusion device, thereby avoided the generation of blood back phenomenon.

Again since the height of floating plug 4 greater than [overall diameter * sin (bus of the rounding platform ring body position 4b of 90 °-floating plug (4) and the angle value of its axis) of the circle ring column position 4a of interior diameter-floating plug (4) of the circle ring column position 3a of Mo Feishi pipe 3]/cos (bus of the rounding platform ring body position 4b of 90 °-floating plug (4) and the angle value of its axis); So when the angle value of the circle ring column position 3a of Mo Feishi pipe 3 and the angle of horizontal plane is spent the angle value of the bus of the rounding platform ring body position 4b that deducts floating plug 4 and its axis more than or equal to 90, still can not take place when floating plug (4) descends with the medicinal liquid liquid level, floating plug 4 is by on the inwall of stranded circle ring column position 3a at Mo Feishi pipe 3, or floating plug 4 one sides are laid on the inwall of circle ring column position 3a of Mo Feishi pipe 3, opposite side lies on the table on the inwall of rounding platform ring body position 3b of Mo Feishi pipe 3, cause floating plug 4 to fall, the phenomenon of the blood return prevention afunction that appearance causes because the rounding platform ring body position 4b of floating plug 4 can't seal the rounding platform ring body position 3b of Mo Feishi pipe 3.Simultaneously also because the numerical value that the height of the circle ring column position 4a of floating plug 4 discloses greater than this formula, to satisfy the independent claims part described so its is inevitable: the height of the floating plug the when height of floating plug 4 should equal Mo Feishi and manages the interior diameter of circle ring column position 3a on 3 tops greater than: the external diameter of a circle of the central longitudinal sectional view of floating plug 4.So floating plug 4 is no matter be transporting in the way with transfusion device, still in use with transfusion device, can not manage in 3 or tipping rollover phenomenon takes place at Mo Feishi, avoided transfusion to finish after, floating plug 4 can be in the whereabouts by stranded and the forfeiture phenomenon of blood return prevention function occurs.

Because a rounding platform ring body is arranged at the bottom of Mo Feishi pipe 3, the bottom of floating plug 4 is rounding platform ring body 3b that sealed up by the thin rounding stage body of a height at the bottom surface of floating plug, so waste of material when having avoided floating plug 4 to make, because if floating plug 4 is designed to the circular cone ring body, the part on so additional this section band pinnacle must be inserted in tube for transfusion 2 connectors that Mo Feishi manages 3 bottoms accurately, and being with one section of the pinnacle on the floating plug 4 like this is can not produce sealing effectiveness.If the inclination of certain angle takes place in Mo Feishi pipe 3 when transfusion finishes, because floating plug 4 is flat crouching on the water surface, so in floating plug 4 falls, if floating plug 4 is being with this section pinnacle part, just might make this pinnacle part of floating plug 4 can not accurately aim at below the Mo Feishi pipe 3 and connector tube for transfusion 2, and cause floating plug 4 sealing of can't falling.

Hard thing extruding is forced to distortion because long-term quilt has been used on the top of Mo Feishi pipe 3, after extrudate is cancelled, its high-elastic flexible plastic that resiles is made, so when Mo Feishi pipe 3 transfusion device be transported or storage process in, the hard thing extruding of secular quilt is forced to distortion, after extrudate is cancelled, it is returned to the original form, institute so that transfusion device in use, the floating plug 4 that can cause because Mo Feishi manages 3 upper deformation does not occur card and manages phenomenon in floating-upward process.

A kind of blood return preventing infusion device bottle plug puncture unit 1 as described in Figure 2 connects tube for transfusion 2, tube for transfusion 2 connects Mo Feishi pipe 3, and the top of Mo Feishi pipe 3 is circle ring column 3a that closed up by a semi-round ball ring body 3c who is connected with tube for transfusion connector 3d at the place, centre in the upper end.A rounding platform ring body 3b is arranged at the bottom, wherein the bottom of Mo Feishi pipe 3 uses the duroplasts of disposable use " notes, defeated class " the medical apparatus and instruments special use that meets standards of pharmacopoeia to make, the disposable use meet standards of pharmacopoeia " annotate, defeated class " medical apparatus and instruments special use is used on top, and when it is out of shape by hard thing compressing for a long time, after extrudate is cancelled, the soft high-elastic plastic production that it is resiled.

On the Mo Feishi pipe 3, following two ones extend upward an annulus post by the upper end at the rounding platform ring body position 3b of Mo Feishi pipe 3, the annulus post groove of a hollow of the recessed formation of the top end surface of this annulus post, in this annulus post groove, in the circle ring column position 3a of the size of overall diameter and Mo Feishi pipe 3, the consistent size of overall diameter, just allow Mo Feishi pipe 3 circle ring column position 3a the lower end sleeve wherein, simultaneously in the extending part of rounding platform position 3b, extended upward one by sleeve again circle ring column position 3a the inside that part of and make the inwall of Mo Feishi pipe 3 keep smooth fluent circular arc ring, realize on the Mo Feishi pipe 3, two-part connection down.

In Mo Feishi pipe 3, a floating plug 4 is set.In floating plug 4, the bottom is the rounding platform ring body 4b that a bottom surface is sealed up by the thin rounding stage body of a height, and top is the circle ring column 4a that a upper bottom surface is sealed up by the thin cylinder of a height.The outer surface of floating plug 4 all seals.

The bottom of floating plug 4 all uses the sealing flexible glue of disposable use " notes, defeated class " the medical apparatus and instruments special use that meets standards of pharmacopoeia to make, and the plastic production of disposable use " notes, defeated class " the medical apparatus and instruments special use that meets standards of pharmacopoeia is all used on the top of floating plug 4.

1: greater than: [overall diameter * sin (bus of the rounding platform ring body position 4b of 90 °-floating plug (4) and the angle value of its axis) of the circle ring column position 4a of interior diameter-floating plug (4) of the circle ring column position 3a of Mo Feishi pipe 3]/cos (bus of the rounding platform ring body position 4b of 90 °-floating plug (4) and the angle value of its axis); 2: greater than: the outer radius of the circle ring column position 4a of the quality/floating plug of whole floating plug 4 (4) square * density of pi * water.

Connect tube for transfusion 2 below the Mo Feishi pipe 3, the outside of the tube for transfusion 2 below the Mo Feishi pipe 3 is nested with flow regulator 5, the tail end of the tube for transfusion 2 below the flow regulator 5 connects outer cone joint 6, or connect below the outer cone joint 6 and can disconnect the primary infusion pipe (2a) that sleeve is lived, connect intravenous needle 7 below the primary infusion pipe 2a.

A kind of blood return preventing infusion device bottle plug puncture unit 1 as described in Figure 3 connects tube for transfusion 2, tube for transfusion 2 connects Mo Feishi pipe 3, and the top of Mo Feishi pipe 3 is circle ring column 3a that closed up by a round platform ring body 3c who is connected with tube for transfusion connector 3d at the place, centre in the upper end.A rounding platform ring body 3b is arranged at the bottom, wherein the bottom of Mo Feishi pipe 3 uses the duroplasts of disposable use " notes, defeated class " the medical apparatus and instruments special use that meets standards of pharmacopoeia to make, the disposable use meet standards of pharmacopoeia " annotate, defeated class " medical apparatus and instruments special use is used on top, and when it is out of shape by hard thing compressing for a long time, after extrudate is cancelled, the soft high-elastic plastic production that it is resiled.

In floating plug 4, part remaining behind the bottom surface of removing floating plug 4 in floating plug 4 bottoms is carried out the innner and outer layering, skin is close to and is nested with outside nexine, nexine extends upward the top that forms floating plug 4, extend to form the bottom surface of floating plug 4 downwards, and this skin in the floating plug 4 all uses the sealing flexible glue of disposable use " notes, defeated class " the medical apparatus and instruments special use that meets standards of pharmacopoeia to make, and the plastic production of disposable use " notes, defeated class " the medical apparatus and instruments special use that meets standards of pharmacopoeia is all used at the position of other in the floating plug 4.

A kind of blood return preventing infusion device as described in Figure 4, a kind of blood return preventing infusion device bottle plug puncture unit 1 as described in Figure 2 connects tube for transfusion 2, tube for transfusion 2 connects Mo Feishi pipe 3, and the top of Mo Feishi pipe 3 is circle ring column 3a that closed up by a round platform ring body 3c who is connected with tube for transfusion connector 3d at the place, centre in the upper end.A rounding platform ring body 3b is arranged at the bottom, wherein the bottom of Mo Feishi pipe 3 uses the duroplasts of disposable use " notes, defeated class " the medical apparatus and instruments special use that meets standards of pharmacopoeia to make, the disposable use meet standards of pharmacopoeia " annotate, defeated class " medical apparatus and instruments special use is used on top, and when it is out of shape by hard thing compressing for a long time, after extrudate is cancelled, the soft high-elastic plastic production that it is resiled.

In floating plug 4, circle ring column 4a from floating plug 4 tops is divided into two-section up and down, from following that section circle ring column 4a to the bottom of floating plug 4, in part remaining behind the bottom surface of removing floating plug 4 carried out, outer layering, skin is close to and is nested with outside nexine, nexine extends to form the bottom surface of floating plug 4 downwards, extend upward and form remaining that part of in floating plug 4 tops, and the sealing flexible glue that this skin in the floating plug 4 all uses the disposable use that meets standards of pharmacopoeia " to annotate; defeated class " the medical apparatus and instruments special use is made, and other position in the floating plug 4 all uses the disposable use that meets standards of pharmacopoeia " to annotate; defeated class " plastic production of medical apparatus and instruments special use.

A kind of blood return preventing infusion device as described in Figure 5, bottle plug puncture unit 1 connects tube for transfusion 2, tube for transfusion 2 connects Mo Feishi pipe 3, and the top of Mo Feishi pipe 3 is circle ring column 3a that closed up by a round platform ring body 3c who is connected with tube for transfusion connector 3d at the place, centre in the upper end.A rounding platform ring body 3b is arranged at the bottom, wherein the bottom of Mo Feishi pipe 3 uses the duroplasts of disposable use " notes, defeated class " the medical apparatus and instruments special use that meets standards of pharmacopoeia to make, the disposable use meet standards of pharmacopoeia " annotate, defeated class " medical apparatus and instruments special use is used on top, and, it is forced to distortion when being subjected to hard thing extruding for a long time, after extrudate is cancelled, its flexible plastic that resiles is at once made.

The overcoat box 3e of the Mo Feishi pipe of making of duroplasts 3 that can open and take off in one of the outer setting of Mo Feishi pipe 3.

One little section circle ring column 4a in the bottom of floating plug (4) and the top of floating plug 4 and the junction bottom uses the sealing flexible glue of the disposable use that meets standards of pharmacopoeia " annotate, defeated class " medical apparatus and instruments special use to make, and the plastic production of the disposable use that meets standards of pharmacopoeia " annotate, defeated class " medical apparatus and instruments special use is used at other position in floating plug (4) top.

Fig. 2, the operating process of Fig. 3, Fig. 4 and the operation of Fig. 1 are in full accord, so here just no longer repeated.In the operation of Fig. 5, with the difference of Fig. 1 be: when before extruding Mo Feishi pipe, opening the duroplasts cover box that is nested with in the Mo Feishi tube outside earlier, and in order to make the nursing staff can observe the working condition of dripping speed and blood return prevention floating plug from different perspectives, so also need this cover box is removed from the outside of Mo Feishi pipe.

Annotate: above-mentioned Fig. 1; Fig. 2, is diagrams more of the present utility model at Fig. 3, Fig. 4, Fig. 5, is not to restriction of the present utility model; as long as meet the protection domain of this utility model claims, its any accommodation all is no more than this utility model protection domain.

Claims

1. blood return preventing infusion device, it comprises: bottle plug puncture unit (1), tube for transfusion (2), Mo Feishi manages (3), the floating plug (4) in the Mo Feishi pipe (3), flow regulator (5), outer cone joint (6), primary infusion pipe (2a), intravenous needle (7), it is characterized in that: a rounding platform ring body (3b) is arranged at the bottom of Mo Feishi pipe (3), and the bottom of floating plug (4) is a rounding platform ring body (4b) that bottom surface is sealed; Mo Feishi manages rounding platform ring body (3) bottom and floating plug (4) bottom, and their bus equates with the angle value of its axis; The maximum inner diameter of the bottom of each overall diameter of the bottom of the minimum interior diameter＜floating plug (4) of the bottom of Mo Feishi pipe (3)＜Mo Feishi pipe (3); The top of Mo Feishi pipe (3) is a circle ring column that is closed up in the upper end (3a), the top of floating plug (4) is upwardly extending from the maximum gauge of its bottom, and be the folded mutually successively body that forms of a lot of anchor rings of axis with the extension of the axis of its bottom, wherein the largest outer diameter on floating plug (4) top equals the interior diameter of the largest outer diameter of its bottom less than Mo Feishi pipe (3) top circle ring column (3a) position, and the upper bottom surface of floating plug (4) seals; The top of floating plug (4) is after the lower seal with Mo Feishi pipe (3) of the bottom of floating plug (4), and the point that the point of any one in the top of floating plug (4) is all got along well on Mo Feishi pipe (3) inwall overlaps; The outer surface of whole floating plug (4) all seals; The outer volume on floating plug (4) top multiply by the quality that the density of water is subjected to greater than whole floating plug (4); The height of the floating plug (4) the when height of floating plug (4) should equal the interior diameter at circle ring column (3a) position on Mo Feishi pipe (3) top greater than: the external diameter of a circle of the central longitudinal sectional view of floating plug (4); The height of floating plug (4) should greater than: when knockdown takes place in Mo Feishi pipe (3), floating plug (4) in decline, floating plug (4) maximum height in the time of phenomenon on Mo Feishi pipe (3) inwall can occurring being stuck; The upper and lower of Mo Feishi pipe (3) connects by mutual belled mode.

2. a kind of blood return preventing infusion device as claimed in claim 1, it is characterized in that: in floating plug (4), bottom surface is sealed up by the thin rounding stage body of a height, upper bottom surface is sealed up by the thin cylinder of a height, floating plug (4) top is except upper bottom surface, and other position all is a circle ring column (4a).

3. a kind of blood return preventing infusion device as claimed in claim 1 is characterized in that: the top of Mo Feishi pipe (3) be one in the upper end by the circle ring column (3a) of thin circle ring column (3c) closing in of height that joins at place, centre and tube for transfusion connector (3d).

4. a kind of blood return preventing infusion device as claimed in claim 1 is characterized in that: the top of Mo Feishi pipe (3) is a circle ring column (3a) that is closed up by a round platform ring body (3c) that is connected with tube for transfusion connector (3d) at the place, centre in the upper end.

5. a kind of blood return preventing infusion device as claimed in claim 1 is characterized in that: the top of Mo Feishi pipe (3) is a circle ring column (3a) that is closed up by a semi-round ball ring body (3c) that is connected with tube for transfusion connector (3d) at the place, centre in the upper end.

6. a kind of blood return preventing infusion device as claimed in claim 1, it is characterized in that: when: the bottom of floating plug (4) is the rounding platform ring body (4b) that a bottom surface is sealed up by the thin rounding important actor of a height, top is the circle ring column (4a) that a upper bottom surface is sealed up by the thin cylinder of a height, and a rounding platform ring body (3b) is arranged at the bottom of Mo Feishi pipe (3), when top was a circle ring column that is closed up in the upper end (3a), the height at circle ring column (4a) position of floating plug (4) should be simultaneously greater than following two numerical value: the outer radius at circle ring column (4a) position of the quality/floating plug (4) of 1 whole floating plug (4) square * density of pi * water; Overall diameter * the sin (bus at rounding platform ring body (4b) position of 90 °-floating plug (4) and the angle value of its axis) at circle ring column (4a) position of the interior diameter-floating plug (4) at circle ring column (3a) position of 2[Mo Feishi pipe (3)]/cos (bus at rounding platform ring body (4b) position of 90 °-floating plug (4) and the angle value of its axis).

7. a kind of blood return preventing infusion device as claimed in claim 2 is characterized in that: upper and lower two parts of floating plug (4) do not connect part, are one-time formed.

8. a kind of blood return preventing infusion device as claimed in claim 2 is characterized in that: floating plug (4) forms by upper and lower two-section attaching, and is the interface of the upper and lower two-section of floating plug (4) with the anchor ring at the upper and lower two-part interface place of floating plug (4).

9. a kind of blood return preventing infusion device as claimed in claim 2, it is characterized in that: floating plug (4) forms by upper and lower two-section attaching, it is divided into two sections to the top of floating plug (4), epimere links to each other with the top, hypomere links to each other with the bottom of floating plug (4), and is the interface of the upper and lower two-section of floating plug (4) with the interface of another section in wherein a section and floating plug (4) top in floating plug (4) top.

10. a kind of blood return preventing infusion device as claimed in claim 2, it is characterized in that: in floating plug (4), to be divided into the innner and outer two-layer removing that part of behind floating plug (4) bottom surface in floating plug (4) bottom, its ectomesoderm is close to and is nested with outside nexine, and nexine extends to form the bottom surface of floating plug (4) downwards, extends upward to form floating plug (4) top.

11. a kind of blood return preventing infusion device as claimed in claim 2, it is characterized in that: in floating plug (4), that below following section from floating plug (4) top section is removed that part of behind the bottom surface in the bottom of floating plug (4), and to be divided into the innner and outer two-layer, its ectomesoderm is close to and is nested with outside nexine, and nexine extends to form the bottom surface of floating plug (4) downwards, extends upward be left in the top that forms floating plug (4) that part of.

12. a kind of blood return preventing infusion device as claimed in claim 1 is characterized in that: the outside of Mo Feishi pipe (3) is not provided with the overcoat box.

13. a kind of blood return preventing infusion device as claimed in claim 1 is characterized in that: the outside of Mo Feishi pipe (3) is provided with an overcoat box (3e) that it is covered.

14. a kind of blood return preventing infusion device as claimed in claim 1, it is characterized in that: Mo Feishi pipe (3) be by the upper end at rounding platform ring body (3b) position extend upward an interior diameter consistent with the interior diameter at circle ring column (3a) position and the longitudinal section be one below high, the bottom is at the torus of the right-angled trapezium of inboard, middle and lower part in this toric outside, stretch out again extension with the bus of rounding platform ring body (3b) is a hypotenuse, with the ring wall thickness of the circle ring column (3a) of Mo Feishi pipe (3) is that the longitudinal section of the length of top right-angle side is the ring body of inverted right angled triangle, lower end at circle ring column (3a) position is downward along the size and dimension of the outer surface of the extension of Mo Feishi pipe (3) bottom, stretch out, extend to till the top right-angle side place of this triangle ring body always, realize on the Mo Feishi pipe (3), two-part connection down.

15. a kind of blood return preventing infusion device as claimed in claim 1, it is characterized in that: on the Mo Feishi pipe (3), following two ones extend upward an annulus post by the upper end at rounding platform ring body (3b) position of Mo Feishi pipe (3), the annulus post groove of a hollow of the recessed formation of the top end surface of this annulus post, in this annulus post groove, in circle ring column (3a) position on the size of overall diameter and Mo Feishi pipe (3) top, the consistent size of overall diameter, just allow Mo Feishi pipe (3) circle ring column (3a) position the lower end sleeve wherein, simultaneously in the extending part at rounding platform position, extended upward one by sleeve again circle ring column (3a) position the inside that part of and make the inwall of Mo Feishi pipe (3) keep smooth fluent circular arc ring, realize on the Mo Feishi pipe (3), two-part connection down.