Mixing filtration integrated formula sampling needle for in-vitro diagnosis medical apparatus and instrumentsTechnical field
The present invention relates to a kind of sampling needle is and in particular to a kind of filtration integrated formula of mixing for in-vitro diagnosis medical apparatus and instrumentsSampling needle.
Background technology
In-vitro diagnosis medical apparatus and instruments such as blood cell analyzer, urinary formed element analyser etc. are used for analyzing blood or urineLiquid or other tissue liquid sample.
The suction needle that from container interior suction take liquid sample has been disclosed, if notification number is cn2938104y in prior artUtility model patent, discloses one kind and adopts suction needle, and this includes needle body, probe tube and breather using suction needle, this needle bodyFront end there is tip, this needle body is provided with passage from the recessed cavity of its end face axial and on this needle body perisporium and takesSample hole, this breather and sampling tube side-by-side fill in cavity, and the front end of this breather and probe tube passes through what separation was arranged respectivelyFirst, second passage is connected with passage and thief hole.This utility model only needs to fill in breather and probe tube in needle bodyA sampling suction needle with breather line and sampling conduit can be formed, with respect to the prior art construction before its applying dateSimply, easy to process, and due to not needing to weld, also reduce manufacturing cost.But, there is following asking in this utility modelTopic:
(1) described sampling suction needle is block form binary channel sampling needle, and in its bilateral line structure arranged side by side, two tubules are constitutedCross section be not circular, in cleaning, under identical cross-sectional area, liquor stream distance；And under identical flow quantity, needLonger scavenging period.Even fill in two tubules making this cross section of pin become circular after sleeve pipe, also it is only to realizeSealing to outer surface during cleaning.
(2) its passage is arranged at the lower section of thief hole and closer to tip, there are remaining minute bubbles and is inhaled into fluid pathIn passage, and then affect the risk counting.
(3) when in sample per se with or produce after precipitation some bulky grains, threadiness or other to testing result noWhen the composition of impact or impurity, the composition of these greater particle sizes or impurity enter sampling needle and travel further into instrument sample streamsAfter the valve body of journey and the pump housing, easily make pipeline blockage, cause sampling, cleaning difficult, ultimately result in instrument detection fault.And above-mentioned realityWith new described sampling suction needle, there is no filtering function.
Content of the invention
The technical problem to be solved in the present invention is that a kind of structure of offer is simple, saves cleanout fluid, can effectively reduce or even keep awayExempt from remaining minute bubbles be inhaled into risk in fluid path passage and have concurrently filter and mix function for in-vitro diagnosis medical apparatus and instrumentsMixing filtration integrated formula sampling needle.
The filtration integrated formula sampling needle of mixing for in-vitro diagnosis medical apparatus and instruments of the present invention, including needle body, wherein:
Described needle body is made up of the inner and outer tubes being coaxially disposed, and the front end of needle body is needle section, in needle section, inner tubeThe termination of termination and outer tube be in be tightly connected；The fluid path passage that space formation in said inner tube is passed through for sample, outside inner tubeSpace between wall and outer tube wall forms the gas channels that supplied gas are passed through；
The perisporium of needle body is provided with several (one or more) passages and several (one or two withOn) thief hole, described thief hole in the axial direction compared with passage closer to needle section, described passage is with gas channels evenLogical, and at least one passage is tangent with the bottom face of gas channels；Described thief hole and fluid path channel connection, and at least oneIndividual thief hole is tangent with the bottom face of fluid path passage；
Bore≤the 0.6mm of described thief hole.
Further, the bore of thief hole can be designed as 0.3～0.6mm, to obtain more preferable filter effect.
When passage and thief hole quantity be respectively two or more when, preferably passage all on the perisporium of needle body,Preferably thief hole is also all on the perisporium of needle body.
It is equal that the shape of described passage and thief hole can be designed to different shape, preferably passage and thief hole as neededRounded.
When passage and thief hole are all rounded, in order to improve the intensity of sampling needle needle section further, thief hole existsSet-up mode on needle body perisporium is preferably as follows: described thief hole is in that the arrangement of string single hole follows with the form of string diplopore arrangementRing is arranged on the perisporium of needle body, and described diplopore arranges the line in the center of circle of upper two thief holes and the diameter parallel of needle body, describedThe center of circle of thief hole on single hole row is in 45 ° of angles with the line in the center of circle of the upper one of thief hole of diplopore row with horizontal line.
Compared with prior art, present invention is characterized in that
1st, adopt the design structure of coaxial-type inner and outer pipe, and passage and thief hole be may be contained within needle body perisporiumStructure, it is possible to use sampling needle is carried out with pin type cleaning set, when can also save the consumption of cleanout fluid, reduce cleaningBetween, improve cleaning efficiency, thus improving instrument detection speed.
2nd, thief hole is arranged at the lower section of passage, and compared with passage in the axial direction closer to needle section, is realizing holdingWhile sample fully mixes in device, effectively reduce and even avoid remaining minute bubbles to be inhaled in fluid path passage, and then affectThe risk counting.
3rd, limit the bore of thief hole, take into account filtration needs and imbibition efficiency requirements, it is to avoid be big when drawing liquid sampleGranule foreign enters in sampling needle, prevents sample pipeline from blocking in life-time service, the fault rate of effective lowering apparatus.
4th, design at least one passage and the bottom face of gas channels is tangent, and at least one thief hole is led to fluid pathThe tangent structure of the bottom face in road is it is ensured that gas channels and fluid path passage all can be prevented cross-contamination by thoroughly cleaning.
Brief description
Fig. 1 is the structural representation of one embodiment of the present invention；
Fig. 2 is the partial enlarged drawing of needle body in Fig. 1 illustrated embodiment；
Fig. 3 is the cut-away view of needle body local shown in Fig. 2；
Fig. 4 is the a-a direction view of Fig. 3.
In figure is numbered:
1 sampling needle；2 needle bodies；3 thief holes；4 passages；5 fluid path passages；6 gas channels；7 inner tubes；8 outer tubes.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to more fully understand present disclosure, but the present inventionIt is not limited to following examples.
As shown in Figure 1 to Figure 4, the filtration integrated formula sampling needle 1 of the mixing for in-vitro diagnosis medical apparatus and instruments of the present invention, bagInclude needle body 2, wherein:
Described needle body 2 is made up of the inner tube 7 being coaxially disposed and outer tube 8, and the front end of needle body 2 is needle section, in needle section,The termination of inner tube 7 is in be tightly connected with the termination of outer tube 8, and whole needle body 2 profile is in cylinder body shape；Space in said inner tube 7Form the fluid path passage 5 passing through for sample, one end of this fluid path passage 5 extends at the sealing of needle section inner tube 7 end, separatelyOne end is then connected with the sampling line in in-vitro diagnosis medical apparatus and instruments；Space shape between said inner tube 7 outer wall and outer tube 8 inwallBecome the gas channels 6 that supplied gas are passed through, one end of this gas channels 6 is extended to needle section inner tube 7 outer wall and formed with outer tube 8 inwallSealing at, the other end is then connected with the external aeration pipeline of in-vitro diagnosis medical apparatus and instruments；
Several (one or more is two or more in present embodiment) are provided with the perisporium of needle body 2 lead toPore 4 and several (one or more is two or more in present embodiment) thief holes 3, described thief hole 3 and logicalPore 4 is all rounded, wherein aperture≤the 0.6mm of thief hole 3；Described thief hole 3 is arranged at the lower section of passage 4, itsCompared with passage 4 closer to needle section in axial direction, passage 4 therein is uniformly arranged on the perisporium of needle body 2, these passages 4All connect with gas channels 6, and at least one passage 4 (being four in present embodiment) bottom face phase with gas channels 6Cut；Set-up mode on needle body 2 perisporium for the described thief hole 3 is: thief hole 3 is in the arrangement of string single hole and the arrangement of string diploporeForm is circularly set on the perisporium of needle body 2, and wherein diplopore arranges the line in the center of circle of upper two thief holes 3 and the axis of needle body 2Parallel, the center of circle of thief hole 3 on single hole row with the line in the center of circle of the upper one of thief hole 3 of diplopore row with horizontal line is in45 ° of angles；These thief holes 3 are all connected with fluid path passage 5, and at least one thief hole 3 (being four in present embodiment) withThe bottom face of fluid path passage 5 is tangent.
In above-mentioned embodiment, described in-vitro diagnosis medical apparatus and instruments can be blood cell analyzer, and urine is formedDivide analyser, urinary formed element analyser can be appointed as further, now, sample is urine.
In above-mentioned embodiment, can further by the aperture design of thief hole 3 be 0.3～0.6mm, to obtain preferably mistakeFilter effect.
Using the process that sampling needle 1 of the present invention is operated it is:
By programmable sampling mechanism, 1 time pin of sampling needle in the container of dress sample, inflate to gas channels 6 by air pump,Gas is given vent to anger by the passage 4 of sampling needle 1, and gas forms bubble in the sample, by continuously inflating formation bubble, on bubbleRise, by forming bubble and bubble rising comprehensive function in sample to inflating, so that sample mixes, now stop inflating.After stopping inflating, sample by thief hole 3.After sampling terminates, it is respectively washed gas channels 6 and the fluid path passage of sampling needle 15.