CN202446098U - Vein vacuum blood taking needle with multifunctional visible blood return display - Google Patents
Vein vacuum blood taking needle with multifunctional visible blood return display Download PDFInfo
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- CN202446098U CN202446098U CN2012200569358U CN201220056935U CN202446098U CN 202446098 U CN202446098 U CN 202446098U CN 2012200569358 U CN2012200569358 U CN 2012200569358U CN 201220056935 U CN201220056935 U CN 201220056935U CN 202446098 U CN202446098 U CN 202446098U
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Abstract
The utility model relates to a vein vacuum blood taking needle with a multifunctional visible blood return display. The vein vacuum blood taking needle mainly comprises a blood taking needle, a transparent air decompression chamber, a transparent blood taking needle base, a blood taking tube needle and a telescopic blood taking tube needle sheath and is characterized in that a transparent and visible blood return tube is arranged in the air decompression chamber, the air decompression chamber is arranged on the outer circumference of the transparent and visible blood return tube, the transparent and visible blood return tube comprises a natural blood return visible section and a dynamic blood return experiment visible section and extends to the front end of the blood taking needle base, and an air outlet gap communicated with the air decompression chamber is reserved between the transparent and visible blood return tube and the inner surface of the blood taking needle base. The vein vacuum blood taking needle has functions of enabling blood return to be visible, fast and accurately judging whether a needle head is in vessels and whether the needle head already pierces the vessels and being capable of fast and accurately judging whether negative pressure exists in a blood taking tube, simultaneously facilitates blood taking operation of medical staff, saves blood taking time, improves blood taking efficiency, and has the advantages of being simple in structure, reasonable in design, easy to manufacture, low in cost and the like.
Description
Technical field
This utility model belongs to clinical medicine vacuum venous blood collection technical field, particularly relates to a kind of vein vacuum blood taking needle that has multifunctional visible blood back display.
Background technology
Pen type vein vacuum blood taking needle is widely used in clinical medicine at present, and present most pen type vein blood taking needles do not have visual blood back function, adopt above-mentioned blood taking needle medical personnel when reality is taken a blood sample; Can not see blood back; Therefore can not judge accurately whether venous needle really thrusts in the vein blood vessel, such blood taking needle mainly leans on medical personnel's experience correctly to execute pin in use; In case adopt less than blood, will execute pin again; A kind of visual blood back pen type vein blood taking needle that has the gas pressure-reducing chamber is also disclosed on the market in addition; Though this kind blood taking needle has had very big progress according to traditional blood taking needle; Can realize single visual blood back function, but also have some weak points, need further solve and perfect.
Summary of the invention
This utility model provides a kind of vein vacuum blood taking needle that has multifunctional visible blood back display for solving the technical problem that exists in the known technology; This blood taking needle is simple in structure, easy to use, can save medical personnel's blood sampling time; Guarantee the quality of blood sample; Reduce medical personnel's labor intensity, improve medical personnel's self-confidence psychologically, unnecessary extra misery of avoiding bringing to patient and unnecessary expense expenditure because of medical personnel's erroneous judgement.
The technical scheme that this utility model is taked for the technical problem that exists in the solution known technology is:
A kind of vein vacuum blood taking needle that has multifunctional visible blood back display; Mainly comprise blood taking needle, transparent gas pressure-reducing chamber, transparent blood sampling bobbin needle stand, blood sampling bobbin and telescopic blood taking tube needle shield; Said blood taking needle sealing and fixing is installed in the front end in gas pressure-reducing chamber; Said blood sampling bobbin needle stand sealing and fixing is installed in the rear end in gas pressure-reducing chamber; Said blood sampling bobbin sealing and fixing is installed in blood sampling bobbin needle stand rear end, and said blood sampling bobbin needle stand is provided with the external screw thread that cooperates with transparent blood sampling tubular bracket, and said telescopic blood taking tube needle shield is sleeved on the blood sampling bobbin needle stand; It is characterized in that: the transparent visual blood back pipe that is provided with in the said gas pressure-reducing chamber; The excircle of said transparent visual blood back pipe is the gas pressure-reducing chamber, and said transparent visual blood back pipe comprises nature blood back visible segments and dynamic blood back experiment visible segments, and said transparent visual blood back pipe extends to blood sampling bobbin needle stand front end; And leave the gap of giving vent to anger with blood sampling bobbin needle stand inner surface, be connected with the gas pressure-reducing chamber through this gap.
This utility model can also adopt following technical measures:
Said vein vacuum blood taking needle also comprises rule, and said rule is arranged on the outer surface of transparent visual blood back pipe.
Said rule becomes the one-sided transparent visual blood back tube outer surface that is distributed in.
Said transparent visual blood back pipe and gas pressure-reducing chamber are structure as a whole; Said blood sampling bobbin needle stand and transparent visual blood back pipe adopt the interpolation type structure; The inboard that is said blood sampling bobbin needle stand is provided with cylindrical boss; Said boss is inserted in the transparent visual blood back pipe, and leaves the gap of giving vent to anger with transparent visual blood back inside pipe wall.
Said transparent visual blood back pipe and gas pressure-reducing chamber are structure as a whole; Said blood sampling bobbin needle stand and transparent visual blood back pipe adopt the jacket-type structure; The inboard that is said blood sampling bobbin needle stand is provided with overcoat; The end of said transparent visual blood back pipe is inserted in the overcoat, and and outer casing inner wall between leave the gap of giving vent to anger.
Said transparent visual blood back pipe and gas pressure-reducing chamber are structure as a whole, and said blood sampling bobbin needle stand and transparent visual blood back pipe adopt tight fit, and mating surface between the two is provided with venthole.
Be provided with filter element in the described gap of giving vent to anger.
Blood sampling bobbin needle stand is provided with positioning bar between said blood sampling bobbin needle stand and the transparent visual blood back pipe.
Said gas pressure-reducing chamber becomes tapered or oblate type.
Said transparent visual blood back pipe is structure as a whole with blood sampling bobbin needle stand; Be that transparent visual blood back pipe is molded through the dowel one with blood sampling bobbin needle stand; And leave the gap of giving vent to anger between transparent visual blood back pipe and the blood sampling bobbin needle stand; The other end of transparent visual blood back pipe inserts in the front end endoporus of gas pressure-reducing chamber, and its transparent visual blood back tube cavity communicates with the blood taking needle inner chamber.
Advantage and the good effect that the utlity model has are: because this utility model adopts technique scheme, the utlity model has following advantage:
1, has visual blood back function.This function also is the unique visual blood back function of existing " visual blood back written examination vein blood taking needle ", need not carefully to state.
2, through observation to " natural blood back visible segments "; Can see the length of the moving distance of vein blood back blood linear flow clearly, the speed of flow velocity, and then can judge each patient's the blood sampling complexity and the roughly length of required blood sampling time immediately; This bifunctional advantage; Can make medical personnel get into venous moment, can accomplish to know what's what the foundation of the self-confidence in the time of can improving its blood sampling again at syringe needle.
3, the contrast and the read functions that have rule; When indivedual especial patients are taken a blood sample; When the less situation of blood back blood line amplitude of variation occurring (mainly being the patient that blood viscosity is too high or the volumetric blood scun forces down); Accurate contrast that can be through rule with read, realize the purpose of correct judgement.
4, has accurate judgement blood collection needles 100% in endovascular function.The test method of this kind function has two kinds: (1) for the patient that can cooperate, and the homonymy palm of please patient will taking a blood sample is done a palm and stretched the test of clenching fist (speed is not too fast).(2) for the patient that can not cooperate (mainly being child patient), only need medical personnel's 5-6cm venous locations above venipuncture point, the action that repeats once to oppress and lift with finger can finish.Though above-mentioned two kinds of methods are different; But principle is identical; All can cause by the partial pulse pressure of blood sampling vein and change (raise earlier and afterwards restore); The short time instantaneous variation of this kind pulse pressure can cause that equally blood back blood line changes in time endovascular moment synchronously, can see clearly that the blood line returns endovascular accurate variation in this section as long as medical personnel observe " the dynamically bleedback test visible segments " of the transparent visual blood back pipe in the gas pressure-reducing chamber; Through reading chi, also know concrete length and position that the blood line changes.Its rule is: when oppressing vein or clenching fist; Multifunctional visible returns endovascular blood line meeting elongated or obviously elongated (this section is " dynamically bleedback test visible segments "); When stopping to oppress vein or stretching fist, the blood line can be withdrawn into the initial position or the distance of " natural blood back visible segments " again.All this type of regularity that occurs change (if blood back blood line just shows distance than the elder in " natural blood back visible segments "; Only need gently to press vein or clench fist gently, feel that the blood line is obviously elongated get final product with shortening, and then anti-hemostasis line extreme is elongated and make blood enter into the inside and outside airspace place of blood back pipe rear end; Influence is the susceptiveness of dynamic bleedback test next time); Can judge accurately that definitely in blood vessel, its accuracy rate is 100% to syringe needle.The particular design of this rule; Especially to some discrete especial patient; Because of the flexible amplitude of blood back blood line less, must the weight vein during experiment or firmly clench fist, could improve the amplitude of variation of blood line; And the accurate contrast through rule and read the telescopic variation value of its blood line, to realizing that accurately the purpose of judgement is particularly important.Special in addition the prompting please notes this dynamic bleedback test, when normal blood sampling, as long as medical personnel's perception knows what is what, as long as see when having blood back to occur in " natural blood back visible segments ".Can plug blood taking tube at once and accomplish blood sampling.Only be difficult to judge that medical personnel syringe needle whether endovascular the time, just needs adopting said method to reach the purpose of rapid judgement.
5, on the basis of natural blood back, (promptly can be observed the nature blood back), have the accurate judgement syringe needle specific function of piercing blood vessel through " natural blood back visible segments ".Determination methods is: as long as repeat the concrete grammar of above-mentioned advantage 4; If blood back blood line is no any telescopic variation in " dynamically bleedback test visible segments "; Can rotate an angle rapidly this moment with syringe needle; If the blood line does not also have any telescopic variation, can judge clearly that the venous blood collection syringe needle is not in blood vessel.Next at the skin that examines the syringe needle place, if hematoma convexity person proves syringe needle and broken away from blood vessel; If there is not any hematoma convexity person, the blood vessel that can prove needle pierces.This situation of all chances has two kinds of solutions: the one, through method of the present invention, at first divide three sections with syringe needle; Carry out a little withdraw of the needle, whenever move back a bit of after, (speed is actual to be very fast to repeat the test of above-mentioned advantage 4 immediately; And method is extremely simple again), when finding that blood back blood line satisfied the variation occur in " dynamically bleedback test visible segments ", the susceptible of proof syringe needle returns in the blood vessel again no matter which section to change all at; Connect fast at once and go up vacuum test tube; Utilize the principle of negative pressure of vacuum blood collection, not only can stop blood from blood vessel to subcutaneous excessive, also can accomplish blood sampling work.The 2nd, in the process of the withdraw of the needle, very fast bigger convexity appears in ecchymosis, or because of withdraw of the needle operation unskilled; Syringe needle has been broken away from blood vessel; This situation of all chances, the method for solution can only be rapidly pin to be extracted and at vein place, hematoma position, carry out Pressur hemostatic a moment (about about 5 minutes) after; Again choose other vein again, accomplish blood sampling and get final product.
6, on the basis of natural blood back, (promptly can be observed the nature blood back), can accurately judge the specific function whether negative pressure in the vacuum test tube disappears through " natural blood back visible segments ".When the blood sampling bobbin has thrust the rubber cap on the blood taking tube, realized connection work, but lose venous blood and flow in the blood taking tube this moment.Meet this situation, can earlier blood taking needle be turned an angle, get rid of because of negative pressure appears in needle slope and vein blood vessel inwall and paste adsorption phenomena, flow in the blood taking tube, get final product the determination methods of repetition 4 as also loseing venous blood.As seen the telescopic variation of blood back blood line in " dynamically bleedback test visible segments ", prove that promptly blood collection needles does not break away from the endovascular while, the negative pressure in the blood taking tube of also having given counterevidence disappears, no negative pressure occurs.At this moment, only need change a new vacuum test tube completion blood sampling job again and get final product, this method only is applicable to first blood sampling tube of single tube blood sampling or multitube blood sampling, so indicate hereby.Thoroughly avoided because of needle pierces the reason of blood vessel, but erroneous judgement has promptly been saved blood sampling time for the generation of no negative pressure appearance in the blood taking tube, has made things convenient for medical personnel's blood sampling again, and has improved the self-confidence of medical personnel in face of patient.
In addition, though this utility model has multiple utilitarian function simultaneously, very simple and unique on design structure.On processing and manufacturing assembled material cost, the listing product " visual blood back pen type vein blood taking needle " of the U.S. BD that uses with present market much at one, is made no distinction of rank.
Description of drawings
Fig. 1 is this utility model external structure sketch map;
Fig. 2 is an A-A cutaway view among Fig. 1;
Fig. 3 is gas pressure-reducing chamber and a transparent visual blood back pipe interpolation type structural representation among the embodiment 1;
Fig. 4 is an I portion enlarged drawing among Fig. 3;
Fig. 5 is gas pressure-reducing chamber and a transparent visual blood back pipe jacket-type structural representation among the embodiment 1;
Fig. 6 is an I portion enlarged drawing among Fig. 5;
Fig. 7 is structural representation when gas pressure-reducing chamber and transparent visual blood back pipe tight fit among the embodiment 1;
Fig. 8 is a B-B cutaway view among Fig. 7;
Fig. 9 to Figure 12 is embodiment 2 structural representations;
Figure 13 to Figure 16 is embodiment 3 structural representations;
Figure 17 is embodiment 4 structural representations;
Figure 18 is this utility model user mode structural representation.
Among the figure: 1, blood taking needle; 2, gas pressure-reducing chamber; 3, blood sampling bobbin needle stand; 3-1, positioning bar; 4, blood sampling bobbin; 5, blood taking tube needle shield; 6, blood sampling tubular bracket; 7, transparent visual blood back pipe; 7a, natural blood back visible segments; 7b, dynamic blood back experiment visible segments; 8, the gap of giving vent to anger; 9, blood taking needle protection pen; 10, filter element; 11, venthole; 12, rule; 13, dowel.
The specific embodiment
For further understanding summary of the invention, characteristics and the effect of this utility model, the following examples of giving an example now, and conjunction with figs. specifies as follows:
A kind of vein vacuum blood taking needle that has multifunctional visible blood back display; Mainly comprise blood taking needle 1, transparent gas pressure-reducing chamber 2, transparent blood sampling bobbin needle stand 3, blood sampling bobbin 4 and telescopic blood taking tube needle shield 5; Said blood taking needle 1 sealing and fixing is installed in the front end in gas pressure-reducing chamber 2; Said blood sampling bobbin needle stand 3 sealing and fixing are installed in the rear end in gas pressure-reducing chamber 2; Said blood sampling bobbin 4 sealing and fixing are installed on the blood sampling bobbin needle stand rear end 3, and said blood sampling bobbin needle stand 3 is provided with the external screw thread that cooperates with transparent blood sampling tubular bracket 6, and said telescopic blood taking tube needle shield 5 is sleeved on the rear end 1 of blood sampling bobbin needle stand; The transparent visual blood back pipe 7 that is provided with in the said gas pressure-reducing chamber 2; The excircle of said transparent visual blood back pipe 7 is gas pressure-reducing chamber 2, and said transparent visual blood back pipe 7 comprises nature blood back visible segments 7a and dynamic blood back experiment visible segments 7b, and said transparent visual blood back pipe 7 extends to blood sampling bobbin needle stand 3; And leave the gap 8 of giving vent to anger with blood sampling bobbin needle stand 3 inner surfacies, be connected with gas pressure-reducing chamber 2 through this gap.
The applicant is the retired traditional Chinese medical science of name, because of possessing clinical blood sampling experience for many years and aerodynamic and the hydrodynamics knowledge learned, carries out well-designedly according to following design principle, and its principle is:
(1), under the constant prerequisite of blood taking needle pin intracavity footpath and gas pressure-reducing chamber total measurement (volume), the distance of flow and the speed of blood back blood line depend on size and the size of blood back resistance and the height of blood viscosity of venous pressure.
(2), the characteristics that have better elastic and compressibility because of air; The volume and the gas total measurement (volume) amount of multifunctional visible blood back device gas pressure-reducing chamber and blood back tube chamber in as long as we the change hemostix; Will change the distance of flow and the flow velocity of blood back blood line, and the gas content of airtight blood taking needle is few more, its mobile distance of blood back blood line (length) is just short more; Speed is also slow more, otherwise the person is opposite.
(3), under the prerequisite that its gas content is constant in airtight blood taking needle; As long as a little changes the partial vein pressure of blood sampling vein (for example after blood collection procedure is seen blood back; Through stretching of the patient vein of 5-6cm above test or the compressing venous blood collection point of clenching fist; Can cause that all this section venous pulse pressure changes), will cause in the transparent visual blood back pipe variation of the moving distance of blood back blood linear flow and the change of flow velocity moment.Prerequisite is to guarantee that visual blood back pipe has enough length and space, just can make medical personnel observe omnidistance sensitive the variation and concrete changing value of its blood back blood line.
The applicant is according to above three rules; Through research for many years; At first in the theory design,, become multifunctional visible blood back function with existing single visual blood back function; Make visual blood back on function, produce qualitative leap and raising, really solve multiple difficulty and inconvenience that medical personnel run into when blood sampling.
On theoretical structural design; Thoroughly discarded existing design with blood taking needle backshank or puncture needle backshank insertion blood back pipe or observation ward; Cause the short or too short phenomenon of actual blood back visual range, can only realize single visual blood back function, because of lacking effective visual length of dynamic bleedback test and space; And can't specifically observe blood back when experiment, its blood back blood line is visual time endovascular concrete variation; The 2nd, thoroughly discarded present single visual blood back function is inserted in the transparent visual blood back pipe by needle body, and leans on the two design gaps that leaves, and realizes that blood back flows into the observing effect of realizing or improve visual blood back in the gap.This kind method is realizing definitely having the advantage that is remarkable on the single visual blood back function; But they all are not suitable for the design and the instructions for use of multifunctional visible blood back; Because the design and the structure in the gap of this kind reservation, its junction can cause the remarkable reinforcement of blood siphon power and the capillary variation of blood, through the actual bleedback test of repeated multiple times; All susceptible of proof can reduce blood back blood line, the sensitivity when various variation the and the accuracy of observation.
This utility model adopts technique scheme, and the major function and the designing requirement of its critical piece are specific as follows:
(1), the gas pressure-reducing chamber 2: gas pressure-reducing chamber 2 requires to select for use the good transparent material of hydrophobicity to be made.Profile is cone shape or oblate shape, and intracavity is provided with the multifunctional visible blood back pipe that is communicated with it in the hollow form of optimal design, and the front end in gas pressure-reducing chamber is provided with three sections not isometrical intravenous needle needle body holes, and communicates with multifunctional visible blood back pipe.Not isometrical hole is played the blood taking needle needle body respectively function spacing, that fix and make things convenient for sealing is installed.Gas pressure-reducing chamber 2 rearward end are designed with the seam that is connected of and sealing and fixing continuous with blood taking needle needle stand front end.The gas pressure-reducing chamber also can be designed to the appearance and modeling of various graces according to the market demand, consumer taste under the prerequisite that guarantees optimal gas volume and handled easily.In sum, mainly acting as of gas pressure-reducing chamber: (1) sealing and fixing vein blood taking needle; (2) connect fixedly multifunctional visible blood back pipe and blood taking needle needle stand; (3) through the locular wall in " gas pressure-reducing chamber ", the various blood backs that can observe clearly in " multifunctional visible blood back pipe " change; (4) because of the gas pressure-reducing chamber contains best amount of air volume, and communicate, reduce the blood back resistance and take into account blood back blood line mobile dual-use function in ideal distance again so can play with multifunctional visible blood back pipe.
(2), transparent visual blood back pipe: transparent visual blood back pipe is lengthened to effective design length; And the rear end of visual blood back pipe is connected with the blood taking needle needle stand; (annotate: the also corresponding lengthening of the length in gas pressure-reducing chamber; In order to realize the best fit of the two) full name is " multifunctional visible blood back pipe ", and be divided into two-stage nitration theoretically.Leading portion is called " natural blood back visible segments ", and effect is to accomplish syringe needle to thrust visual blood back function behind the vein and mobile apart from length through observing blood back blood line, and the speed speed comes the preliminary whether smooth length that reaches blood sampling time of judging blood sampling; Back segment is called " dynamically bleedback test visible segments "; Its effect is; When experiment, judge with correct in the various variations of multifunctional visible blood back pipe back segment " dynamically bleedback test visible segments " through observing blood back blood line, realize the final purpose of design of multifunctional visible blood back.The coverage standard of " natural blood back visible segments " is: when low venous pressure is taken a blood sample, can see that true blood back gets final product; When high venous pressure is taken a blood sample; The mobile most distant point of its blood back blood line is exactly the optimal design length of " natural blood back visible segments " to the length overall between the starting point of visual blood back.The coverage standard of " dynamically bleedback test visible segments " is: count from " natural blood back visible segments " solstics; (this point also is the theoretical intermediate line of front and back two-stage nitration, but when hanging down venous pressure, this intermediate line is reach automatically) testing or the vein compression test through stretching to clench fist; Cause the local pulse pressure rising of venous (should select high venous pressure patient) as subjects and standard; Cause that blood back blood line in " dynamically bleedback test visible segments " mobile ultimate range, is exactly the preliminary length of " dynamically bleedback test visible segments ", add one section safe distance; This safe distance is generally 2mm, is exactly the optimal design length of " dynamically bleedback test visible segments ".Two visible segments optimal design length are closed mutually in addition, be exactly the optimal design total length of " multifunctional visible blood back pipe ".Annotate: the safe distance of 2mm is meant that multifunctional visible blood back pipe pipe end is connected bearing with needle stand; Design the gap of the logical less blood of certain many ventilations, guarantee blood taking needle pin chamber air and blood back pipe tube chamber air can with the air intercommunication in the gas pressure-reducing chamber and the proper flow of blood back blood line.In case the vein blood back gets in experimental stage, this gap is said the same with preamble, and same meeting is because of the remarkable enhancing of the siphon power of blood and the surface tension variations of blood, and then the susceptiveness of reduction blood back blood line variation and the accuracy of observation.So in order to prevent blood back blood line at the trial, get into its joint gap place, reserve the safe distance of 2mm hereby.
When reality was taken a blood sample, because of each patient's individual difference, the sick kind of its state of an illness separately was also inequality, and venous pressure separately is different especially.So front and rear-viewed section length separately is not mathematical absolute value and immobilizing, but relative value in the detection of dynamic.The key factor that changes depends on the size of patient's venous pressure; If patient is vein low pressure when blood sampling; The theoretical intermediate line of two sections visible segments will be to " natural blood back visible segments " displacement so; Cause " natural blood back visible segments " distance to shorten, the distance of " dynamically bleedback test visible segments " is corresponding elongated.But the rule of changing ten thousand times without leaving the original aim or stand is: change in any case, all be the theoretical intermediate line of two sections visible segments motionless basically or only forward section move, and not backward section move.Because the design of theoretical intermediate line is in when blood sampling by the highest venous pressure; Blood back blood line is mobile longest distance point in the blood back pipe, locatees two sections theoretical intermediate line, only in this way; Leave sufficient length and space could for " dynamically bleedback test visible segments "; The sensitivity of accomplishing the various variations at the trial of blood back blood line is expressed correct observation and the judgement with medical personnel, and above-mentioned variation is normal phenomenon still not, also is the maximum characteristics of living body blood drawing; It does not only influence normal detection, still guarantees the normal detection and the basis of accurately judging of " multiple functional displays ".
Visual blood back pipe should be selected the good material transparent of hydrophobicity for use; Inner chamber is designed to through hole; The choice criteria in aperture is, on the basis that guarantees normal blood back and bleedback test function, medical personnel can be made things convenient for observe blood back clearly and the blood back variation is the optimum aperture.The material of being selected for use also must have both the good performance of hydrophobicity except will having good transparency, reduce or avoid blood to stick the blood back inside pipe wall, and quality and effect are observed in influence.The inwall of blood back pipe must have good fineness, reduces the circulating resistance of blood and adhering to of blood.The front end of " multifunctional visible blood back pipe " is connected with the front end in " gas pressure-reducing chamber ", and the rear end is connected with the front end of blood taking needle needle stand.Generally speaking, " multifunctional visible blood back pipe " is disposable injection molded with " gas pressure-reducing chamber ".
(3), blood sampling bobbin needle stand 3: for transparency and room brilliancy and the quality of blood drawn that increases the gas pressure-reducing chamber; Advise practicing midwifery producer, when processing and manufacturing, will select the good transparent material of hydrophobicity equally for use; Because of this needle stand in when blood sampling; Be that wide-angle inserting needle and wide-angle are observed, can more or less influence observing effect, thereby require to adopt transparent material.The front end cylindrical of this needle stand is designed with seam, and the sealing that links to each other with the rear end in gas pressure-reducing chamber.On the concentric end face of " blood sampling bobbin needle stand " front end, be designed with various structure, all can interconnect and cooperate, mainly comprise three kinds of connected modes with the position, rear end of the visual blood back pipe 7 of multifunctional transparent:
(1), see also Fig. 3 and Fig. 4: said transparent visual blood back pipe and gas pressure-reducing chamber are structure as a whole; Said blood sampling bobbin needle stand and transparent visual blood back pipe adopt the interpolation type structure; The inboard that is said blood sampling bobbin needle stand is provided with cylindrical boss; Said boss is inserted in the transparent visual blood back pipe, and leaves the gap of giving vent to anger with transparent visual blood back inside pipe wall.
(2), see also Fig. 5 and Fig. 6: said transparent visual blood back pipe and gas pressure-reducing chamber are structure as a whole; Said blood sampling bobbin needle stand and transparent visual blood back pipe adopt the jacket-type structure; The inboard that is said blood sampling bobbin needle stand is provided with overcoat; The end of said transparent visual blood back pipe is inserted in the overcoat, and and outer casing inner wall between leave the gap of giving vent to anger.
(3), see also Fig. 7 and Fig. 8: said transparent visual blood back pipe and gas pressure-reducing chamber are structure as a whole, and said blood sampling bobbin needle stand and transparent visual blood back pipe adopt tight fit, and mating surface between the two is provided with venthole 11.
Above-mentioned three kinds of modes, in order to guarantee blood sampling bobbin endoporus concentricity in transparent visual blood back pipe and the blood sampling bobbin needle stand, blood sampling bobbin needle stand is provided with positioning bar 3-1 between said blood sampling bobbin needle stand and the transparent visual blood back pipe.
But no matter which kind of method of attachment; All to guarantee following 2 requirements: the one, guarantee to connect the concentricity of cooperation; The 2nd, guarantee connecting portion; Best airspace will be arranged each other, and and " gas pressure-reducing chamber " between form gas intercommunication exchange function, realize many ventilations ideal effects of logical blood less.Be provided with three sections not isometrical through holes in " blood sampling bobbin needle stand ", and communicate with multifunctional visible blood back pipe, it is spacing to the installation of blood taking needle needle body, fixing and make things convenient for the function of sealing that play respectively in not isometrical hole.The tail end of " blood sampling bobbin needle stand " is designed with linking neck and the ring-type tapered protrusion platform that links to each other with telescopic blood taking tube needle shield; Play the effect of connection, fixing, the telescopic blood sampling bobbin rubber protective sleeve of sealing jointly, on the outer edge surface of blood sampling bobbin needle stand, be designed with the coarse-pitch thread that is connected with the clear tubular support; When blood sampling; Can with the clear tubular support " interior system coarse-pitch thread interconnect fixingly, that accomplishes blood taking tube inserts extract operation smoothly, realizes the purpose of convenient blood sampling.
(4), the installation of the two-way pin of blood taking needle 1 and blood sampling bobbin 4 formations requires with fixing: two-way pin (referring to the vein blood taking needle and the bobbin of taking a blood sample) is wanted firmly except installing and fixing; Outside sealing is wanted thoroughly; The needle body of rear portion separately of two-way pin definitely can not be inserted in the tube chamber of multifunctional visible blood back pipe and gas pressure-reducing chamber inner chamber, has obviously reduced the sensitivity that blood back blood line changes and cause coverage because of blood back blood line to shorten; And then brought difficulty for the correct judgement of dynamic bleedback test; Even, increased the extra blood sampling misery of patient, so this point also is core content of the present invention and requirement because of the appearance erroneous judgement has influenced normal blood sampling.
(5), all belong to prior art, for blood taking needle protection pen 9 and clear tubular support 6 at this so do not giving unnecessary details.
The pressure-reducing chamber of gas described in the said structure both can have been done tapered, also can make oblateness, and manufacturer can carry out the mould design according to actual needs.
This utility model determination methods in use is following:
(1), judges that blood collection needles is whether 100% in blood vessel.The test method of this kind function has two kinds: (1) for the patient that can cooperate, and the homonymy palm of please patient will taking a blood sample is done a palm and stretched the test of clenching fist (speed is not too fast).(2) for the patient that can not cooperate (mainly being child patient), only require medical personnel's 5-6cm venous locations above venipuncture point, the action that repeats once to oppress and lift with finger can finish.Though above-mentioned two kinds of methods are different; But principle is identical; All can cause by the partial pulse pressure of blood sampling vein and change (raise earlier and afterwards restore); The short time instantaneous variation of this kind pulse pressure can cause that equally blood back blood line changes in time endovascular moment synchronously, can see clearly that the blood line returns endovascular accurate variation in this section as long as medical personnel observe " the dynamically bleedback test visible segments " of the transparent visual blood back pipe in the gas pressure-reducing chamber; Through reading chi, also know concrete length and position that the blood line changes.Its rule is: when oppressing vein or clenching fist; Multifunctional visible returns endovascular blood line meeting elongated or obviously elongated (this section is " dynamically bleedback test visible segments "); When stopping to oppress vein or stretching fist, the blood line can be withdrawn into the initial position or the distance of " natural blood back visible segments " again.All this type of regularity that occurs change (if blood back blood line just shows distance than the elder in " natural blood back visible segments "; Only need gently to press vein or clench fist gently, feel that the blood line is obviously elongated get final product with shortening, and then anti-hemostasis line extreme is elongated and make blood enter into the inside and outside airspace place of blood back pipe rear end; Influence is the susceptiveness of dynamic bleedback test next time); Can judge accurately that definitely in blood vessel, its accuracy rate is 100% to syringe needle.Special in addition the prompting please notes this dynamic bleedback test, when normal blood sampling, as long as medical personnel's perception knows what is what, as long as see when having blood back to occur in " natural blood back visible segments ".Can plug blood taking tube at once and accomplish blood sampling.Only be difficult to judge that medical personnel syringe needle whether endovascular the time, just needs adopting said method to reach the purpose of rapid judgement.
(2), on the basis of natural blood back; Judge whether piercing blood vessel of syringe needle; Determination methods is: as long as repeat the concrete grammar of above-mentioned advantage (1), if blood back blood line no any telescopic variation in " dynamically bleedback test visible segments ", can rotate an angle rapidly this moment with syringe needle; If the blood line does not also have any telescopic variation, can clearly declare the venous blood collection syringe needle not in blood vessel.Next at the skin that examines the syringe needle place, if hematoma convexity person proves syringe needle and broken away from blood vessel; If there is not any hematoma convexity person, the blood vessel that can prove needle pierces.This situation of all chances has two kinds of solutions: the one, through method of the present invention, at first divide three sections with syringe needle; Carry out a little withdraw of the needle, whenever move back a bit of after, (speed is actual to be very fast to repeat the test of said method (1) immediately; And method is extremely simple again), when finding that blood back blood line satisfied the variation occur in " dynamically bleedback test visible segments ", the susceptible of proof syringe needle returns in the blood vessel again no matter which section to change all at; Connect fast at once and go up vacuum test tube; Utilize the principle of negative pressure of vacuum blood collection, not only can stop blood from blood vessel to subcutaneous excessive, also can accomplish blood sampling work.The 2nd, in the process of the withdraw of the needle, very fast bigger convexity appears in ecchymosis, or because of withdraw of the needle operation unskilled; Syringe needle has been broken away from blood vessel; This situation of all chances, the method for solution can only be that syringe needle is extracted rapidly and at vein place, hematoma position, carry out Pressur hemostatic a moment (about about 5 minutes) after; Again choosing other vein, accomplishing blood sampling and get final product.
(3), on the basis of natural blood back, judge that whether the negative pressure in the vacuum test tube disappears.When the blood sampling bobbin has thrust the rubber cap on the blood taking tube, realized connection work, but lose venous blood and flow in the blood taking tube this moment.Meet this situation, can earlier blood taking needle be turned an angle, get rid of because of negative pressure appears in needle slope and vein blood vessel inwall and paste adsorption phenomena, flow in the blood taking tube, get final product the determination methods of repetition said method (1) as also loseing venous blood.As seen the telescopic variation of blood back blood line at dynamic bleedback test visible segments 7b, do not break away from the endovascular while in the proof blood collection needles, the negative pressure in the blood taking tube of also having given counterevidence disappears, no negative pressure occurs.Only need change a new vacuum test tube completion blood sampling job again gets final product.This kind method only is applicable to first pipe of single tube blood sampling or multitube blood sampling; Indicate hereby; Thoroughly avoided because of needle pierces the reason of blood vessel, but erroneous judgement has promptly been saved blood sampling time for the generation of no negative pressure appearance in the blood taking tube; Make things convenient for medical personnel's blood sampling again, and improved the self-confidence of medical personnel in face of patient.
When this utility model was taken a blood sample at clinical practice, its method for using and existing method basically identical need not increase any additional act; So the blood sampling that does not change nurse's operation sequence and formed custom, thereby bring great convenience for nurse's use, let medical personnel grasp method for using more easily; Simple to operation; And more intuitively, understand at a glance, the characteristics of just bringing for use therefore can wide popularization and application.
This utility model is convenient to medical personnel's blood sampling operation, saving blood sampling time and is improved blood sampling efficient in sum.In addition this utility model also have simple in structure, reasonable in design, be easy to make, advantage such as with low cost.
The above is merely the preferable example of executing of this utility model, is not the practical range that is used for limiting this utility model.Be that all equivalences of doing according to the content of this utility model claim change and modification, all fall into the technical scope of this utility model.
Claims (10)
1. vein vacuum blood taking needle that has multifunctional visible blood back display; Mainly comprise blood taking needle, transparent gas pressure-reducing chamber, transparent blood sampling bobbin needle stand, blood sampling bobbin and telescopic blood taking tube needle shield; Said blood taking needle sealing and fixing is installed in the front end in gas pressure-reducing chamber; Said blood sampling bobbin needle stand sealing and fixing is installed in the rear end in gas pressure-reducing chamber; Said blood sampling bobbin sealing and fixing is installed in blood sampling bobbin needle stand rear end, and said blood sampling bobbin needle stand is provided with the external screw thread that cooperates with transparent blood sampling tubular bracket, and said telescopic blood taking tube needle shield is sleeved on the blood sampling bobbin needle stand; It is characterized in that: be provided with transparent visual blood back pipe in the said gas pressure-reducing chamber; The excircle of said transparent visual blood back pipe is the gas pressure-reducing chamber, and said transparent visual blood back pipe comprises nature blood back visible segments and dynamic blood back experiment visible segments, and said transparent visual blood back pipe extends to blood sampling bobbin needle stand front end; And leave the gap of giving vent to anger with blood sampling bobbin needle stand inner surface, be connected with the gas pressure-reducing chamber through this gap.
2. the vein vacuum blood taking needle that has multifunctional visible blood back display according to claim 1 is characterized in that: also comprise rule, said rule is arranged on the outer surface of transparent visual blood back pipe.
3. the vein vacuum blood taking needle that has multifunctional visible blood back display according to claim 2 is characterized in that: said rule becomes the one-sided transparent visual blood back tube outer surface that is distributed in.
4. the vein vacuum blood taking needle that has multifunctional visible blood back display according to claim 1 and 2; It is characterized in that: said transparent visual blood back pipe and gas pressure-reducing chamber are structure as a whole; Said blood sampling bobbin needle stand and transparent visual blood back pipe adopt the interpolation type structure; The inboard that is said blood sampling bobbin needle stand is provided with cylindrical boss, and said boss is inserted in the transparent visual blood back pipe, and leaves the gap of giving vent to anger with transparent visual blood back inside pipe wall.
5. the vein vacuum blood taking needle that has multifunctional visible blood back display according to claim 1 and 2; It is characterized in that: said transparent visual blood back pipe and gas pressure-reducing chamber are structure as a whole; Said blood sampling bobbin needle stand and transparent visual blood back pipe adopt the jacket-type structure; The inboard that is said blood sampling bobbin needle stand is provided with overcoat, and the end of said transparent visual blood back pipe is inserted in the overcoat, and and outer casing inner wall between leave the gap of giving vent to anger.
6. the vein vacuum blood taking needle that has multifunctional visible blood back display according to claim 1 and 2; It is characterized in that: said transparent visual blood back pipe and gas pressure-reducing chamber are structure as a whole; Said blood sampling bobbin needle stand and transparent visual blood back pipe adopt tight fit, and mating surface between the two is provided with venthole.
7. the vein vacuum blood taking needle that has multifunctional visible blood back display according to claim 1 is characterized in that: be provided with filter element in the described gap of giving vent to anger.
8. the vein vacuum blood taking needle that has multifunctional visible blood back display according to claim 1 is characterized in that: blood sampling bobbin needle stand is provided with positioning bar between said blood sampling bobbin needle stand and the transparent visual blood back pipe.
9. the vein vacuum blood taking needle that has multifunctional visible blood back display according to claim 1 and 2 is characterized in that: said gas pressure-reducing chamber is tapered or oblate.
10. the vein vacuum blood taking needle that has multifunctional visible blood back display according to claim 1; It is characterized in that: said transparent visual blood back pipe is structure as a whole with blood sampling bobbin needle stand; Be that transparent visual blood back pipe is molded through the dowel one with blood sampling bobbin needle stand; And leave the gap of giving vent to anger between transparent visual blood back pipe and the blood sampling bobbin needle stand; The other end of transparent visual blood back pipe inserts in the front end endoporus of gas pressure-reducing chamber, and its transparent visual blood back tube cavity communicates with the blood taking needle inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200569358U CN202446098U (en) | 2012-02-21 | 2012-02-21 | Vein vacuum blood taking needle with multifunctional visible blood return display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200569358U CN202446098U (en) | 2012-02-21 | 2012-02-21 | Vein vacuum blood taking needle with multifunctional visible blood return display |
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| Publication Number | Publication Date |
|---|---|
| CN202446098U true CN202446098U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200569358U Expired - Fee Related CN202446098U (en) | 2012-02-21 | 2012-02-21 | Vein vacuum blood taking needle with multifunctional visible blood return display |
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| Country | Link |
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| CN (1) | CN202446098U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103976747A (en) * | 2014-04-11 | 2014-08-13 | 上海金塔医用器材有限公司 | Safety blood taking needle |
| CN104274190A (en) * | 2014-04-11 | 2015-01-14 | 上海金塔医用器材有限公司 | Safety blood taking needle |
| JP2017515514A (en) * | 2014-04-11 | 2017-06-15 | シャンハイ ジンタ メディカル カンパニー リミティド | Safety blood collection needle |
| CN107137095A (en) * | 2017-04-10 | 2017-09-08 | 姜全国 | Blood back pin catamaran type visible structure and catamaran type visible blood-back pin |
-
2012
- 2012-02-21 CN CN2012200569358U patent/CN202446098U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103976747A (en) * | 2014-04-11 | 2014-08-13 | 上海金塔医用器材有限公司 | Safety blood taking needle |
| CN104274190A (en) * | 2014-04-11 | 2015-01-14 | 上海金塔医用器材有限公司 | Safety blood taking needle |
| CN104274190B (en) * | 2014-04-11 | 2015-05-27 | 上海金塔医用器材有限公司 | Safety blood taking needle |
| CN103976747B (en) * | 2014-04-11 | 2015-12-09 | 上海金塔医用器材有限公司 | Safe blood-taking needle |
| JP2017515514A (en) * | 2014-04-11 | 2017-06-15 | シャンハイ ジンタ メディカル カンパニー リミティド | Safety blood collection needle |
| US9943258B2 (en) | 2014-04-11 | 2018-04-17 | Shanghai Jinta Medical Co., Ltd. | Safety blood-collection needle |
| CN107137095A (en) * | 2017-04-10 | 2017-09-08 | 姜全国 | Blood back pin catamaran type visible structure and catamaran type visible blood-back pin |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20140221 |