CN104338207A

CN104338207A - Intravenous infusion automatic negative pressure transmission cutoff bottle penetrating needle

Info

Publication number: CN104338207A
Application number: CN201310315932.0A
Authority: CN
Inventors: 朱盛楠
Original assignee: HENAN CHENNUO SCIENCE & TECHNOLOGY Co Ltd
Current assignee: HENAN CHENNUO SCIENCE & TECHNOLOGY Co Ltd
Priority date: 2013-07-25
Filing date: 2013-07-25
Publication date: 2015-02-11

Abstract

The invention provides an intravenous infusion automatic negative pressure transmission cutoff bottle penetrating needle. The gravity and buoyancy principles are used. A floating needle in the bottle penetrating needle floats upwards through the liquid medicine buoyancy in a liquid medicine bottle and a sealed diversion nozzle is opened for keeping smooth infusion during the infusion. When the infusion is completed and the liquid medicine surface declines or the bottle is replaced by another bottle for changing the liquid medicine in midway, the floating needle floats downwards by pulling out the bottle penetrating needle and the liquid medicine diversion nozzle is sealed for preventing the liquid medicine surface from declining and the air from entering a lower infusion tube and avoiding the occurrence of backflow of the blood, and meanwhile, the negative pressure is generated and transmitted to drive a system to work to further achieve infusion care management. The intravenous infusion automatic negative pressure transmission cutoff bottle penetrating needle is simple in structure and good in sealing cutoff effect, can be widely popularized and applied, can effectively reduce the labor intensity of medical care workers and improve the quality of service, and has great economic and social benefits.

Description

A bottle pin is worn in the conduction of a kind of venous transfusion automatic cut-off negative pressure

Technical field

The invention provides the conduction of a kind of venous transfusion automatic cut-off negative pressure and wear a bottle pin, particularly one utilizes gravity and law of buoyancy, when medicinal liquid bottle inner liquid medicine is totally lost, automatic cut-off prevents transfusion device inner liquid medicine face excessive descent and reflux blood back phenomenon from occurring, and a bottle pin is worn in the venous transfusion automatic cut-off negative pressure conduction that can realize again negative pressure conduction.

Background technology

The common disposable intravenous infusion set of current use, does not possess automatic cut-off function, and in venous transfusion process, the careless slightly generation that will cause reflux blood back phenomenon, brings unnecessary trouble to transfusion; Many improvement projects and design invention have been there is in this field, in order to solve existing reflux blood back problem in venous transfusion for this reason; The method adopted mainly contains two large classes; One is gravity cut-off method, and main employing installs ball float additional, float needle, conical plug, diaphragm, flap valve etc. in infusion unit titrimeter; The gravity principle that these class methods make use of in venous transfusion realizes cut-off, but in popularization, there is cut-off less effective, and the reasons such as technology is not mature enough, and manufacturability is poor, function singleness are not popularized widely and applied; Another kind of is utilize external force to assist the automatic cut-off realizing infusing, it has mainly adopted detection of electrons method, gravimetric method, magnetic method, volumetric method etc., although this class methods technology is comparatively advanced, cut-off effect comparatively accurately and reliably, while cut-off, also achieve cut-off alarm function; But be not up to the present still widely used and apply, tracing it to its cause, it is simple not that these class methods have operation, and it is not too convenient to use, and utilizes external force to assist and deal with problems, do not meet energy-saving principle, too increase the technical problem that external force utilizes simultaneously.

My separate case application many moneys automatic cut-off negative pressure conducts transfusion device, its automatic cut-off negative pressure conducting structure all designs the lower tube for transfusion position be connected with Murphy tube in Murphy tube, because height reason is difficult to gather the negative pressure maximum in catheter of transfusion system, thus have influence on systemic-function, therefore at the highest point of transfusion device, conduct with the venous transfusion automatic cut-off negative pressure of wearing bottle pin Integral design and wear a bottle pin, neither change the structural principle of common disposable transfusion device, energy-conserving and environment-protective, again can automatic cut-off, utilize peak suction value in tube for transfusion, can also prevent transfusion Chinese medicine liquid level excessive descent and reflux blood back phenomenon from occurring simultaneously.

Summary of the invention

The invention provides the conduction of a kind of venous transfusion automatic cut-off negative pressure and wear a bottle pin, particularly one utilizes gravity and law of buoyancy, the automatic cut-off when medicinal liquid bottle inner liquid medicine is totally lost, prevent medicinal liquid face excessive descent and reflux blood back phenomenon from occurring, a bottle pin is worn in the venous transfusion automatic cut-off negative pressure conduction that can realize again negative pressure conduction; In order to achieve the above object, technical scheme of the present invention is achieved in that bottle pin 1 is worn in the conduction of described venous transfusion automatic cut-off negative pressure, its by wearing a bottle syringe needle 1-1, cut-off float needle 1-2, water conservancy diversion module 1-3, negative pressure conducting structure 1-4 form; Wearing a bottle syringe needle 1-1 is positioned at topmost, and its lower end sealing installation opening 1-1-10, forms assembly with the sealing assembly bench 1-3-3 assembly connection of water conservancy diversion module 1-3; Cut-off float needle 1-2 is positioned at float needle chamber 1-1-5, and it is corresponding that diaphragm seal 1-2-2 and medicinal liquid water conservancy diversion chew 1-3-1; The three-way flow guide pipe 1-4-1 of water conservancy diversion module 1-3 and negative pressure conducting structure 1-4 is structure as a whole, and three-way flow guide pipe 1-4-1 chews 1-3-1 with medicinal liquid water conservancy diversion and is communicated with; Its module gas port of water conservancy diversion module 1-3 1-3-2 is communicated with gas port 1-1-7; Tube for transfusion union joint 1-4-1-2 and the tube for transfusion of the lower end of its three-way flow guide pipe of negative pressure conducting structure 1-4 1-4-1 connect; Three-way flow guide pipe 1-4-1 has threeway horizontal mozzle mouth of pipe 1-4-1-3, it communicates with interior gas-liquid inverting chamber shell 1-4-4; Negative pressure conducting structure 1-4 pressure catheter pipe 1-4-2-7 one end and the outer liquid gas hemisphere chamber 1-4-2-5 that replaces is communicated with, one end and external system connectivity.

Bottle pin 1 is worn in described venous transfusion automatic cut-off negative pressure conduction, and it is worn bottle syringe needle 1-1 and is made up of needle tip 1-1-1, the excessive section 1-1-2 of taper, puncture shank 1-1-3, pod apertures 1-1-4, float needle chamber 1-1-5, air guide port 1-1-6, gas port 1-1-7, gas port connector 1-1-8, pore communication seals platform 1-1-9, sealing installation opening 1-1-10; Needle tip 1-1-1 is positioned at end, and the taper surface of the excessive section 1-1-2 of its inferior pyramidal has air guide port 1-1-6; The cross section of puncture shank 1-1-3 is in oblate or circular, and its inner side is float needle chamber 1-1-5, and side is gas port 1-1-7; Cut-off float needle 1-2 is housed in the 1-1-5 of float needle chamber in assembly, the outer wall puncture shank 1-1-3 of float needle chamber 1-1-5 has pod apertures 1-1-4 and ft connection; The sealing assembly bench 1-3-3 of sealing installation opening 1-1-10 and water conservancy diversion module 1-3 assembles one, in the float needle chamber 1-1-5 that assembling is formed, it is corresponding with the diaphragm seal 1-2-2 of cut-off float needle 1-2 that the medicinal liquid water conservancy diversion of water conservancy diversion module 1-3 chews 1-3-1, seals without medicinal liquid water conservancy diversion being chewed 1-3-1 under buoyant state; Pore communication seals platform 1-1-9 is had in the sealing installation opening 1-1-10 of gas port 1-1-7 side, it there is gas port connector 1-1-8, in assembly, the sealing assembly bench 1-3-3 of pore communication seals platform 1-1-9 and water conservancy diversion module 1-3 is sealed and matched, and gas port 1-1-7 seals with the module gas port 1-3-2 of water conservancy diversion module 1-3 and is communicated with.

Bottle pin 1 is worn in described venous transfusion automatic cut-off negative pressure conduction, its cut-off float needle 1-2 by sealing float needle 1-2-1, diaphragm seal 1-2-2 two parts are formed; Sealing float needle 1-2-1 one end is bullet-shaped, and the other end is the hollow tubular structure of neat opening, and opening is sealed by diaphragm seal 1-2-2; Its overall gravity is less than quality of liquid medicine, can float in medicinal liquid.

Bottle pin 1 is worn in described venous transfusion automatic cut-off negative pressure conduction, and its water conservancy diversion module 1-3 chews 1-3-1, module gas port 1-3-2 by medicinal liquid water conservancy diversion, sealing assembly bench 1-3-3, assembling limiting stand 1-3-4, module air conduit 1-3-5 are formed; The three-way flow guide pipe 1-4-1 of water conservancy diversion module 1-3 and negative pressure conducting structure 1-4 is structure as a whole, and medicinal liquid water conservancy diversion chews the upper prolongation mouth of pipe that 1-3-1 is the three-way flow guide pipe 1-4-1 of negative pressure conducting structure 1-4; Module gas port 1-3-2 on water conservancy diversion module 1-3 in length and breadth 90 degree turn to, in assembly, longitudinal section with wear gas port 1-1-7 on bottle syringe needle 1-1 and lead directly to, traversing section and airway connection tube straight-through.

Bottle pin 1 is worn in described venous transfusion automatic cut-off negative pressure conduction, and its negative pressure conducting structure 1-4 is made up of three-way flow guide pipe 1-4-1, liquid gas transposition bulb tube 1-4-2; Three-way flow guide pipe 1-4-1 is made up of the longitudinal mozzle 1-4-1-1 of threeway, tube for transfusion union joint 1-4-1-2, threeway horizontal mozzle pipe 1-4-1-3; Liquid gas transposition bulb tube 1-4-2 is made up of interior hemisphere liquid gas transposition chamber 1-4-2-1, interior liquid gas transposition hemisphere chamber enclosure 1-4-2-2, hemisphere face isolation diaphragm 1-4-2-3, outer liquid gas transposition hemisphere chamber 1-4-2-4, outer liquid gas transposition hemisphere chamber enclosure 1-4-2-5, bulb tube seam 1-4-2-6, pressure catheter 1-4-2-7; Hemisphere face isolation diaphragm 1-4-2-3 is made up of diaphragm annular edge 1-4-2-3-1, diaphragm hemisphere face 1-4-2-3-2; Three-way flow guide pipe 1-4-1 and the liquid gas interior liquid gas of the bulb tube 1-4-2 hemisphere chamber enclosure 1-4-2-2 that replaces that replaces is structure as a whole, and is directly communicated with at the bottom of the chamber of interior hemisphere liquid gas transposition hemisphere chamber 1-4-2-1 with threeway transverse direction mozzle mouth of pipe 1-4-1-3; Interior liquid gas transposition hemisphere chamber 1-4-2-1 is sealed by hemisphere face isolation diaphragm 1-4-2-3; Interior liquid gas transposition hemisphere chamber enclosure 1-4-2-2, assemble one with the outer liquid gas hemisphere chamber enclosure 1-4-2-5 that replace by bulb tube seam 1-4-2-6, formation seals spherical inner chamber; The diaphragm annular edge 1-4-2-3-1 of hemisphere face isolation diaphragm 1-4-2-3 is pressed in interior liquid gas transposition hemisphere chamber enclosure 1-4-2-2 and outer liquid gas replaces between hemisphere chamber enclosure 1-4-2-5, diaphragm hemisphere face 1-4-2-3-2 is with the medicinal liquid pressure change in three-way flow guide pipe 1-4-1, and the replace hemisphere face-piece inwall of hemisphere chamber 1-4-2-4 of the hemisphere face-piece inwall of the hemisphere chamber 1-4-2-1 that can replace with interior liquid gas respectively or outer liquid gas is fitted; Pressure catheter 1-4-2-7 is connected with external corollary system; Tube for transfusion union joint 1-4-1-2 and the tube for transfusion of three-way flow guide pipe 1-4-1 connect.

Bottle pin 1 is worn in described venous transfusion automatic cut-off negative pressure conduction, and its hemisphere face isolation diaphragm 1-4-2-3 is made up of diaphragm annular edge 1-4-2-3-1, diaphragm hemisphere face 1-4-2-3-2 two parts; Diaphragm annular edge 1-4-2-3-1 is in assembly, be pressed in interior liquid gas transposition hemisphere chamber enclosure 1-4-2-2 and outer liquid gas replace between hemisphere chamber enclosure 1-4-2-5, in hermetically-sealed construction, its diaphragm hemisphere face 1-4-2-3-2 cambered surface and interior liquid gas replace hemisphere chamber 1-4-2-1, and outer liquid gas transposition hemisphere chamber 1-4-2-4 coincide.

Beneficial effect

The invention provides the conduction of a kind of venous transfusion automatic cut-off negative pressure and wear a bottle pin, it utilizes own gravity and buoyancy in transfusion, automatic cut-off when medicinal liquid in medicinal liquid bottle is totally lost, prevent medicinal liquid face excessive descent and the reflux blood back phenomenon that causes occurs, conduct the work of negative pressure drive system simultaneously and realize monitoring infusion management; Compared to other stopper, there is structure simple, good sealing effect, the features such as manufacturability is strong; Medical personnel's labor intensity can be effectively reduced in clinical practice, save a large amount of human resources taken for observing transfusion progress, making infusion management more specification, nursing more intimate.

Accompanying drawing explanation

A bottle pin sectional view is worn in the conduction of Fig. 1 venous transfusion automatic cut-off negative pressure

Fig. 2 wears a bottle needle head structure sectional view

Fig. 3 float needle sectional view

Fig. 4 flow-guilding mold block structure sectional view

Fig. 5 threeway negative pressure conducting structure sectional view

Fig. 6 diaphragm seal sectional view

Fig. 7 outer liquid gas transposition hemisphere chamber enclosure perspective view

1, a bottle pin is worn in the conduction of venous transfusion automatic cut-off negative pressure

1-1, wear a bottle syringe needle,

1-1-1 needle tip

The excessive section of 1-1-2 taper

1-1-3 punctures shank

1-1-4 pod apertures,

1-1-5 float needle chamber

1-1-6 air guide port

1-1-7 gas port

1-1-8 gas port connector,

1-1-9 pore communication seals platform

1-1-10 seals installation opening

1-2, cut-off float needle

1-2-1 seals float needle

1-2-2 diaphragm seal

1-3, water conservancy diversion module

1-3-1 medicinal liquid water conservancy diversion is chewed

1-3-2 module gas port

1-3-3 sealing assembly bench,

1-3-4 assembling limiting stand,

1-3-5 module air conduit

1-4, negative pressure conducting structure

1-4-1 three-way flow guide pipe

The longitudinal mozzle of 1-4-1-1 threeway

1-4-1-2 tube for transfusion union joint

The horizontal mozzle mouth of pipe of 1-4-1-3 threeway

1-4-2 liquid gas transposition bulb tube

Liquid gas transposition hemisphere chamber in 1-4-2-1

Liquid gas transposition hemisphere chamber enclosure in 1-4-2-2

1-4-2-3 hemisphere face isolation diaphragm

1-4-2-3-1 diaphragm annular edge

1-4-2-3-2 diaphragm hemisphere face

1-4-2-4 outer liquid gas transposition hemisphere chamber

1-4-2-5 outer liquid gas transposition hemisphere chamber enclosure

1-4-2-6 bulb tube seam

1-4-2-7 pressure catheter.

Detailed description of the invention

In venous transfusion, the tube for transfusion inner liquid medicine flow of disposable intravenous infusion set, because being subject to the Flow-rate adjustment restriction of tiny piercing needle and flow control valve, in the transfusion of the overwhelming majority, by the maximum stream flow flowing of design, can not make have pressure to exist in the inherent whole infusion process of tube for transfusion; Liquid soup in infusion unit titrimeter, while having pressure, also has buoyancy; Material lower than medicinal liquid density will produce buoyancy in its medicinal liquid, floats towards medicinal liquid face, also can decline along with medicinal liquid face and decline simultaneously; If floating agents design is become specific shape, can seal identical with dropping funnel liquid outlet, when declining in medicinal liquid face, it will decline along with medicinal liquid face, sealing infusion unit titrimeter liquid outlet, stops medicinal liquid face to continue to decline, realizes cutoff function, make the positive/negative pressure keeping in stop surface tube for transfusion once varying in size from top to bottom, thus avoid the generation of reflux blood back phenomenon.

Bottle pin 1 is worn in venous transfusion automatic cut-off negative pressure conduction in this case, be linked and packed with lower tube for transfusion, form disposable automatic cut-off negative pressure conduction intravenous transfusion device, in infusion process, identical with common disposable intravenous infusion set operation sequence, the hand-held disposable automatic cut-off negative pressure conduction intravenous transfusion device of medical personnel, first dropping funnel is inverted, insert in medicinal liquid bottle bottle pin is worn in the conduction of venous transfusion automatic cut-off negative pressure, wear a bottle pin to wear out bottle cap and directly enter into the liquid, the cut-off float needle worn in bottle pin will float at floating intracavity, leave medicinal liquid water conservancy diversion to chew, medicinal liquid will be chewed inflow tube for transfusion from medicinal liquid water conservancy diversion and flow in dropping funnel, when rising to the middle medicinal liquid face graduation mark of dropping funnel in medicinal liquid face, slowly dropping funnel is turned again, medicinal liquid will flow in lower tube for transfusion from dropping funnel liquid outlet, after the air in tube for transfusion is discharged completely, medicinal liquid just flows out from venous needle, flow into after venipuncture in the vein blood vessel of patient, enter transfusion state.

In transfusion process, cut-off float needle is under the effect of float needle intracavity medicinal liquid floating power, be suspended in the top in float needle chamber always, when the medicinal liquid in medicinal liquid bottle is totally lost, the medicinal liquid face of float needle intracavity declines, float needle also declines thereupon, the medicinal liquid water conservancy diversion that its diaphragm seal will drop on below is chewed, sealing medicinal liquid water conservancy diversion is chewed, produce cut-off, medicinal liquid after cut-off in tube for transfusion no longer flows, liquid level no longer declines, there is transfusion halted state, now stay the medicinal liquid of tube for transfusion, in tube for transfusion under cut-off state, medicinal liquid pressure is much larger than human vein pressure, the pressure that after cut-off, in tube for transfusion, hypomere is too much, stop surface place transforms my negative pressure up, pressure balance is produced in tube for transfusion, avoiding air enters in tube for transfusion and the generation of reflux blood back phenomenon.

As need continue transfusion, continuous bottle change dressings after operator only gently need pinch dropping funnel, water conservancy diversion sealing chew and will open, float needle float, the pressure balance of tube for transfusion inner liquid medicine is broken and flows downward, and enters continuation transfusion state.

In process of production, the structural member in this case adopts conventional manufacturing techniques to produce, and manufacturability is strong, and production cost is low; Adopt the manufacture of multimode injection moulding, production efficiency; The material that sealing float needle can adopt density less makes, and to increase buoyancy, can reduce volume simultaneously, increase overall appearance effect; Diaphragm seal adopts soft latex material, guarantees sealing effectiveness.

Venous transfusion automatic cut-off negative pressure conduction provided by the present invention wears a bottle pin, good sealing effect, stable and reliable for performance; The design of its float needle, wearing in bottle pin, does not change the structure of common disposable intravenous infusion set, face shaping, does not affect drop observing effect in dropping funnel; Do not affect flow; Be equipped with disposable intravenous infusion set of the present invention, do not change the work habit of medical personnel, its operation sequence is identical with disposable intravenous infusion set, is easy to learn and use; Compared to other stopper, there is structure simple, good sealing effect, the features such as manufacturability is strong; Medical personnel's labor intensity can be effectively reduced in clinical practice, save a large amount of human resources taken for observing transfusion progress, making infusion management more specification, nursing more intimate.

Claims

1. a bottle pin (1) is worn in the conduction of venous transfusion automatic cut-off negative pressure, and by wearing a bottle syringe needle (1-1), cut-off float needle (1-2), water conservancy diversion module (1-3), negative pressure conducting structure (1-4) form; It is characterized in that wearing a bottle syringe needle (1-1) is positioned at topmost, its lower end sealing installation opening (1-1-10), forms assembly with sealing assembly bench (1-3-3) assembly connection of water conservancy diversion module (1-3); Cut-off float needle (1-2) is positioned at float needle chamber (1-1-5), and (1-2-2 chews (1-3-1) to diaphragm seal with medicinal liquid water conservancy diversion corresponding; Water conservancy diversion module (1-3) is structure as a whole with the three-way flow guide pipe (1-4-1) of negative pressure conducting structure (1-4), and three-way flow guide pipe (1-4-1) is chewed (1-3-1) and is communicated with medicinal liquid water conservancy diversion; Its module gas port (1-3-2) of water conservancy diversion module (1-3) is communicated with gas port (1-1-7); Tube for transfusion union joint (1-4-1-2) and the tube for transfusion of the lower end of its three-way flow guide pipe (1-4-1) of negative pressure conducting structure (1-4) connect; Three-way flow guide pipe (1-4-1) has the horizontal mozzle mouth of pipe (1-4-1-3) of threeway, it communicates with interior gas-liquid inverting chamber shell (1-4-4); Negative pressure conducting structure (1-4) pressure catheter pipe (1-4-2-7) one end and outer liquid gas hemisphere chamber (1-4-2-5) of replacing is communicated with, one end and external system connectivity.

2. a bottle pin (1) is worn in venous transfusion automatic cut-off negative pressure conduction according to claim 1, and (((1-1-9, sealing installation opening (1-1-10) are formed for 1-1-8, pore communication seals platform for 1-1-7, gas port connector by needle tip (1-1-1), the excessive section of taper (1-1-2), puncture shank (1-1-3), pod apertures (1-1-4), float needle chamber (1-1-5), air guide port (1-1-6), gas port to it is characterized in that wearing a bottle syringe needle (1-1); Needle tip (1-1-1) is positioned at end, the taper surface of the excessive section of its inferior pyramidal (1-1-2) has air guide port (1-1-6); The cross section of puncture shank (1-1-3) is in oblate or circular, and its inner side is float needle chamber (1-1-5), and side is gas port (1-1-7); Cut-off float needle (1-2) is housed in float needle chamber (1-1-5) in assembly, outer wall puncture shank (1-1-3) of float needle chamber (1-1-5) has pod apertures (1-1-4) and ft connection; Sealing installation opening (1-1-10) assembles one with the sealing assembly bench (1-3-3) of water conservancy diversion module (1-3), in the float needle chamber (1-1-5) that assembling is formed, it is corresponding with the diaphragm seal (1-2-2) of cut-off float needle (1-2) that the medicinal liquid water conservancy diversion of water conservancy diversion module (1-3) chews (1-3-1), seals without medicinal liquid water conservancy diversion being chewed (1-3-1) under buoyant state; Pore communication seals platform (1-1-9) is had in the sealing installation opening (1-1-10) of gas port (1-1-7) side, it there is gas port connector (1-1-8), in assembly, pore communication seals platform (1-1-9) is sealed and matched with the sealing assembly bench (1-3-3) of water conservancy diversion module (1-3), and gas port (1-1-7) seals with the module gas port (1-3-2) of water conservancy diversion module (1-3) and is communicated with.

3. a bottle pin (1) is worn in venous transfusion automatic cut-off negative pressure conduction according to claim 1, it is characterized in that its cut-off float needle (1-2) is made up of sealing float needle (1-2-1), diaphragm seal (1-2-2) two parts; Sealing float needle (1-2-1) one end is bullet-shaped, and the other end is the hollow tubular structure of neat opening, and opening is sealed by diaphragm seal (1-2-2); Its overall gravity is less than quality of liquid medicine, can float in medicinal liquid.

4. a bottle pin (1) is worn in venous transfusion automatic cut-off negative pressure according to claim 1 conduction, it is characterized in that its water conservancy diversion module (1-3) chews (1-3-1), module gas port (1-3-2) by medicinal liquid water conservancy diversion, sealing assembly bench (1-3-3), assembling limiting stand (1-3-4), module air conduit (1-3-5) are formed; Water conservancy diversion module (1-3) is structure as a whole with the three-way flow guide pipe (1-4-1) of negative pressure conducting structure (1-4), and medicinal liquid water conservancy diversion chews the upper prolongation mouth of pipe of the three-way flow guide pipe (1-4-1) that (1-3-1) is negative pressure conducting structure (1-4); Module gas port (1-3-2) on water conservancy diversion module (1-3) in length and breadth 90 degree turn to, in assembly, longitudinal section with wear gas port (1-1-7) on a bottle syringe needle (1-1) and lead directly to, traversing section and airway connection tube straight-through.

5. a bottle pin (1) is worn in venous transfusion automatic cut-off negative pressure conduction according to claim 1, it is characterized in that its negative pressure conducting structure (1-4) is made up of three-way flow guide pipe (1-4-1), liquid gas transposition bulb tube (1-4-2); Three-way flow guide pipe (1-4-1) is made up of the longitudinal mozzle (1-4-1-1) of threeway, tube for transfusion union joint (1-4-1-2), horizontal mozzle pipe (1-4-1-3) of threeway; Liquid gas transposition bulb tube (1-4-2) is made up of interior hemisphere liquid gas transposition chamber (1-4-2-1), interior liquid gas transposition hemisphere chamber enclosure (1-4-2-2), hemisphere face isolation diaphragm (1-4-2-3), outer liquid gas transposition hemisphere chamber (1-4-2-4), outer liquid gas transposition hemisphere chamber enclosure (1-4-2-5), bulb tube seam (1-4-2-6), pressure catheter (1-4-2-7); Hemisphere face isolation diaphragm (1-4-2-3) is made up of diaphragm annular edge (1-4-2-3-1), diaphragm hemisphere face (1-4-2-3-2); Three-way flow guide pipe (1-4-1) and the liquid gas interior liquid gas of bulb tube (1-4-2) the hemisphere chamber enclosure (1-4-2-2) that replace that replace is structure as a whole, interior hemisphere liquid gas replace hemisphere chamber (1-4-2-1) chamber at the bottom of be directly communicated with the threeway transverse direction mozzle mouth of pipe (1-4-1-3); Interior liquid gas transposition hemisphere chamber (1-4-2-1) is sealed by hemisphere face isolation diaphragm (1-4-2-3); Interior liquid gas transposition hemisphere chamber enclosure (1-4-2-2), assemble one with the outer liquid gas hemisphere chamber enclosure (1-4-2-5) that replace by bulb tube seam (1-4-2-6), formation seals spherical inner chamber; The diaphragm annular edge (1-4-2-3-1) of hemisphere face isolation diaphragm (1-4-2-3) is pressed in interior liquid gas transposition hemisphere chamber enclosure (1-4-2-2) and outer liquid gas replaces between hemisphere chamber enclosure (1-4-2-5), diaphragm hemisphere face (1-4-2-3-2) is with the medicinal liquid pressure change in three-way flow guide pipe (1-4-1), and the replace hemisphere face-piece inwall in hemisphere chamber (1-4-2-4) of the hemisphere face-piece inwall in hemisphere chamber (1-4-2-1) of can replacing with interior liquid gas respectively or outer liquid gas is fitted; Pressure catheter (1-4-2-7) is connected with external corollary system; Tube for transfusion union joint (1-4-1-2) and the tube for transfusion of three-way flow guide pipe (1-4-1) connect.

6. a bottle pin (1) is worn in venous transfusion automatic cut-off negative pressure conduction according to claim 1, it is characterized in that its hemisphere face isolation diaphragm (1-4-2-3) is made up of diaphragm annular edge (1-4-2-3-1), diaphragm hemisphere face (1-4-2-3-2) two parts; Diaphragm annular edge (1-4-2-3-1) is in assembly, be pressed in interior liquid gas transposition hemisphere chamber enclosure (1-4-2-2) and outer liquid gas replace between hemisphere chamber enclosure (1-4-2-5), in hermetically-sealed construction, its diaphragm hemisphere face (1-4-2-3-2) cambered surface and interior liquid gas replace hemisphere chamber (1-4-2-1), and outer liquid gas transposition hemisphere chamber (1-4-2-4) is coincide.