CN209048191U - A kind of myeloid biopsy needle - Google Patents

Abstract

The utility model discloses a kind of myeloid biopsy needle, there is a pair to be distributed in the contour cylindrical projection (8) in needle tubing (1) lumenal cross-section diameter both ends and position on needle tubing (1) internal chamber wall；Needle core (3) upper end is threadedly coupled with rotating ring (4), and needle core (3) outer surface has a loop raised, and annular projection lower end has a triggering block (10)；Between needle tubing (1) internal chamber wall and needle core (3), and there is a pair of of sampling set (6) below annular projection, sampling set (6) is semicircle ring, there is an arc convex in the upper end, there is a Z-shaped broken line slot (7) in sampling set (6) outer surface, the horizontal slot length of the Z-shaped broken line slot (7) of two sampling sets (6) differs, and cylindrical projection (8) is located in Z-shaped broken line slot (7).Without rotating needle body repeatedly when the utility model samples, and the distribution character of myeloid tissue is completely kept as far as possible, reduce artificial destruction caused by sampling.

Description

A kind of myeloid biopsy needle

Technical field

The myeloid biopsy needle that the utility model relates to use when blood test field, especially marrow detect.

Background technique

Bone marrow biopsy is a kind of diagnostic techniques complementary with bone marrow aspiration, and bone marrow biopsy is compared with puncture, the material of taking-up Material maintain complete myeloid tissue structure, can overcome the disadvantages that the deficiency of bone marrow aspiration, especially suitable for understand hematopoietic cell density and Percentage shared by it, the distribution of hematopoietic tissue, bone marrow interstital lesion and bone structure variation.

The basic instrument of bone marrow biopsy is myeloid biopsy needle at present, and operating process is substantially identical as puncture process, only It needs needle core extraction rear enclosure connecing upper joint pin in sampling, is then inserted into needle core, 2~6 circles are rotated after inserting needle certain distance, most The withdraw of the needle afterwards is removed and is caught, and ejects bone marrow biopsy tissue with needle core.

In the above process, the inner cavity of column is connect as sampling cavity, and connecing column to be is usually cylindrical tube, when rotating sampling It is an overall structure due to connecing column, is inserted into and the process that rotates repeatedly will lead to and sample myeloid tissue distribution character and be destroyed, Its original distribution character can not completely be kept, on the other hand, it is longer compared with sample length to connect column depth of inner cavity, filling effect compared with Difference needs repeatedly rotatable engagement to move up and down to make marrow enter cavity.

Summary of the invention

Technical problem to be solved by the utility model is: provide a kind of myeloid biopsy needle, without rotary needle repeatedly when sampling Body, and the distribution character of myeloid tissue is completely kept as far as possible, reduce artificial destruction caused by sampling.

The technical solution of the utility model is as follows:

A kind of myeloid biopsy needle, it is needle core, institute in syringe intracavity that including the needle tubing with inner cavity, the upper end of needle tubing, which is handle, It states to have on syringe intracavity wall and a pair of is distributed in the contour cylindrical projection in syringe intracavity cross-sectional diameter both ends and position；

The needle core upper end is threadedly coupled with rotating ring, and needle core outer surface has a loop raised, and annular projection lower end has One triggering block；

Between the syringe intracavity wall and needle core, and there is a pair of of sampling set below annular projection, sampling set is semicircular ring There are an arc convex in part, the upper end, and there are a Z-shaped broken line slot, the level of the Z-shaped broken line slot of two sampling sets in sampling set outer surface Slot lengths etc., cylindrical projection are located in Z-shaped broken line slot；

The annular projection outer diameter is equal with sampling set outer diameter, and is equal to syringe intracavity internal diameter.

Have on the needle core upper surface one perpendicular to upper surface convex block.

There is a circle chamfering in the needle tubing upper end.

The handle side is fluted.

The vertical slot length of the Z-shaped broken line slot is 1.5~2.0 centimetres.

The sampling theorem of the utility model is by traditional complete sampling inner cavity, i.e., one complete cylindrical cavity is split as The sampling set of two panels semi-annular shape, when sampling, one of sampling set first glides insertion ossis, the other half sampling set glides again It is inserted into ossis, to complete to sample.

Sampling set slides up and down the triggering by needle core upper annular protrusion lower end between syringe intracavity wall and needle core Block driving, triggering block is rotated along the axis of needle core when rotating needle core, and the arc convex of side and sampling set upper side acts on, from And push sampling set to rotate in a circumferential direction close to syringe intracavity wall, due to it is initial when, the cylindrical projection on syringe intracavity wall is located at Z-shaped folding In the level trough of wire casing (being that bar groove of the lower section in two level troughs here), then cylindrical projection is gradually leaned on to vertical slots Hold together, when cylindrical projection enters in vertical slots, sampling set slide downward (length that sliding distance depends on vertical slots), another party Face, since the horizontal slot length of Z-shaped broken line slot of two panels sampling set differs, in rotary course, necessarily have a piece of sampling set elder generation to Lower slider, another is then glided during needle core continues rotation, to realize the successively downslide composition sampling of sampling set Chamber sampling.

Z-shaped broken line slot includes the vertical slots of two level troughs of two parallel level troughs and connection, wherein the length of vertical slots Degree determines that the length of sampling, the difference in length of the level trough of two panels sampling set determine the time difference successively glided.

Rotating ring is used to position the annular projection on needle core at a distance from the arc convex of sampling set upper side, it is ensured that selection needle The triggering block of annular projection lower end can sample the arc convex contact of set upper side when core.Using being that fixed rotating ring is motionless, revolve Rotating the needle core is to realize that annular projection is adjusted at a distance from the arc convex for sampling set upper side.Between rotating ring and handle upper end face Nothing is fixedly connected.

Arc convex is the part intercepted on the cylindrical surface of sampling set with a curve, utilizes circumferential direction using arc Active force effect.

Similarly, triggering block is also the part intercepted on the cylindrical surface of annular protrusion with a curve, the curl of side Also for the effect for being convenient for peripheral force.

Arc convex and the axial height of triggering block are equal, and are equal to the vertical slot length of Z-shaped broken line slot.

Annular projection outer diameter and sampling set outer diameter are equal and equal with syringe intracavity internal diameter, so that sampling set produces when gliding Raw certain resistance sense.

Compared with prior art, the mode of two panels sampling set is taken to have the advantage that

Firstly, the sampling filling effect of myeloid tissue is good, since complete cavity length is usually longer than sampling tissue, wherein Can residual air, myeloid tissue is not easily accessible in cavity, it is therefore desirable to pass through what rotation needle tubing or needle core and cooperating moved up and down Myeloid tissue is pressed into cavity by mode, and in such a way that two panels sampling set successively enters, myeloid tissue can preferably inhale It is attached on the inner wall of a piece of sampling set, without considering the influence of residual air, another sampling set plays the role of closing up；

Secondly, the myeloid tissue distribution character destruction to sampling is smaller, due to being stirred without rotating left and right needle tubing or needle core, It is only to be downwardly into, maintains the original form of sampling myeloid tissue substantially.

It is easy to operate, reduce the process that needle core connects upper joint pin of extracting, need to only rotate needle core can be driven sampling set progress Sampling.

Detailed description of the invention

Fig. 1 is the overall structure figure of myeloid biopsy needle；

Fig. 2 is the composition schematic diagram of marrow puncture needle；

Fig. 3 is the schematic diagram of internal structure of needle tubing；

Fig. 4 is the process schematic of needle core driving sampling set；

Fig. 5 and Fig. 6 is the structural schematic diagram of sampling set；

Fig. 7 is needle core and annular projection structural schematic diagram；

Fig. 8 is sampling set and the cylindrical projection combination schematic diagram on syringe intracavity wall.

Specific embodiment

As shown in FIG. 1 to FIG. 2, a kind of myeloid biopsy needle, including the needle tubing 1 with inner cavity, the upper end of needle tubing 1 is handle 2, needle It is needle core 3 in 1 inner cavity of pipe, has on 1 internal chamber wall of needle tubing and a pair of be distributed in 1 lumenal cross-section diameter both ends of needle tubing and position is contour Cylindrical projection 8；3 upper end of needle core is threadedly coupled with rotating ring 4, and 3 outer surface of needle core has a loop raised, and annular projection lower end has One triggering block 10；Between 1 internal chamber wall of needle tubing and needle core 3, and there is a pair of of sampling set 6 below annular projection, sampling set 6 is semicircle There are an arc convex in ring, the upper end, and there are a Z-shaped broken line slot 7, the Z-shaped broken line slot 7 of two sampling sets 6 in 6 outer surfaces of sampling set Horizontal slot length differ, cylindrical projection 8 is located in Z-shaped broken line slot 7, sampling set 6 lower end be located in needle tubing 1；Annular projection Outer diameter and sampling 6 outer diameters of set are equal and equal with 1 internal chamber wall internal diameter of needle tubing.

Preferably, have on 3 upper surface of needle core one perpendicular to upper surface convex block 11, convenient for rotation needle core 3.

Preferably, there is a circle chamfering 9 in 1 upper end of needle tubing, is inserted into needle tubing 1 convenient for needle core 3.

Preferably, 2 side of handle fluted 5 increases frictional force when operator holds.

Preferably, the vertical slot length of Z-shaped broken line slot 7 is 1.5~2.0 centimetres, which is convenient for the myeloid tissue taken out Length meets 0.5~1 centimetre of sampling requirement.

In use, first into needle tubing 1, mobile sampling covers 6, it is ensured that cylindrical projection 8 is placed in the Z-shaped broken line slot of two panels sampling set 6 7 lower end level trough one end keeps the fitting of rotating ring 42 upper surface of handle motionless, needle core 3 is rotated, so that triggering fast 10 thereon It (has been calculated when design needle tubing 1 and needle core 3, it is ensured that triggering block 10 can be just between arc convex on insertion two panels sampling set 6 Between arc convex, and the upper end of sampling set 6, but width direction are touched in the lower end of triggering block 10, i.e., circumferential to keep triggering There are certain intervals in 10 side of block and arc convex side), preparation is completed at this time, and process, which is punctured, according to Normal autopsy executes, After needle tubing 1 is inserted into ossis, needle core 3 is rotated, 6 sampling of two panels sampling set is successively driven, then extracts needle tubing 1, rotation rotation Ring 4 exits 3 a distance of needle core, then is ejected the myeloid tissue in sampling set 6 from 1 upper end of needle tubing with needle core 3.

Claims (5)

1. a kind of myeloid biopsy needle, including the needle tubing (1) with inner cavity, the upper end of needle tubing (1) is handle (2),

It is in needle tubing (1) inner cavity needle core (3), it is characterised in that:

There is a pair to be distributed in the contour cylinder in needle tubing (1) lumenal cross-section diameter both ends and position on needle tubing (1) internal chamber wall Raised (8)；

Needle core (3) upper end is threadedly coupled with rotating ring (4), and needle core (3) outer surface has a loop raised, under annular projection End has a triggering block (10)；

Between needle tubing (1) internal chamber wall and needle core (3), and there are a pair of of sampling set (6), sampling set (6) below annular projection For semicircle ring, there is an arc convex in the upper end, and there is a Z-shaped broken line slot (7) in sampling set (6) outer surface, and two samplings cover (6) The horizontal slot length of Z-shaped broken line slot (7) differ, cylindrical projection (8) is located in Z-shaped broken line slot (7)；

The annular projection outer diameter is equal with sampling set (6) outer diameter, and is equal to needle tubing (1) inner cavity internal diameter.

2. a kind of myeloid biopsy needle according to claim 1, it is characterised in that: there is one to hang down on needle core (3) upper surface Directly in the convex block (11) of upper surface.

3. a kind of myeloid biopsy needle according to claim 1, it is characterised in that: there is a circle chamfering in needle tubing (1) upper end (9)。

4. a kind of myeloid biopsy needle according to claim 1, it is characterised in that: handle (2) side is fluted (5).

5. a kind of myeloid biopsy needle according to claim 1, it is characterised in that: the vertical flute length of the Z-shaped broken line slot (7) Degree is 1.5~2.0 centimetres.