CN115919432A - Be used for preventing fat particle input device in marrow reinfusion liquid - Google Patents

Abstract

The invention discloses an input device for preventing fat particles in bone marrow reinfusion, which relates to the technical field of medical instruments and comprises a needle core tube, wherein the bottom of the needle core tube is provided with a needle head, the outer side of the needle core tube is provided with an input tube, the upper end of the input tube is provided with a filter cavity, the input device also comprises a limiting sliding chute, a pulling spring and a sliding block, the inside of the filter cavity is provided with the limiting sliding chute for limiting the sliding of the sliding block, one end of the pulling spring is fixedly connected with the inside of the filter cavity, and the other end of the pulling spring is fixedly connected with the outer wall of the sliding block.

Description

A device for preventing fat particle input in bone marrow reinfusion fluid

technical field

The invention relates to the technical field of medical devices, in particular to a device for preventing fat particles in bone marrow reinfusion fluid.

Background technique

Intraosseous infusion refers to the use of a bone marrow puncture needle to enter the bone marrow cavity through the bone cortex for infusion or blood transfusion. There are abundant cavernous venous sinuses in the bone marrow cavity, which communicate with the systemic circulation through the central canal, nutrient vein, and emissary vein. Intraosseous infusion is to use The rich vascular network of the bone transports drugs or blood into the blood stream, and the drugs or blood in the bone marrow infusion may be mixed with fat particles, and some of the fat particles will enter the bone marrow cavity during the infusion. It will accumulate in the bone marrow cavity, which will lead to too much fat in the bone marrow cavity. When the bone marrow cavity is filled with a large amount of fat, the hematopoietic function of the bone marrow will be significantly reduced, which will cause aplastic anemia, and it is also easy to cause bone marrow puncture again later. Impact, resulting in failure of bone marrow puncture, which may affect the treatment of patients.

Therefore, a device for preventing fat particles in the bone marrow reinfusion fluid is proposed.

Contents of the invention

The purpose of the present invention is to provide a device for preventing the fat particle input in the bone marrow reinfusion fluid, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the present invention provides the following technical proposal: a device for preventing the input of fat particles in bone marrow reinfusion fluid, comprising a needle core tube, the bottom of the needle core tube is provided with a needle, and the outside of the needle core tube is provided with There is an input pipe, and the upper end of the input pipe is provided with a filter chamber;

The switching mechanism includes a limiting chute, a pulling spring and a slider. The inside of the filter chamber is provided with a limiting chute for limiting the sliding of the slider. One end of the pulling spring is fixedly connected to the inside of the filter cavity. The other end of the pulling spring is fixedly connected to the outer wall of the slider, and the slider is slidably connected to the inside of the filter cavity.

Preferably, it also includes a detection spring, a filter bucket and a filter membrane, the bottom end of the detection spring is fixedly connected to the inside of the slider, the filter bucket is fixedly connected to the top of the detection spring, and the filter bucket is slidably connected to the sliding block. Inside the block, the filter membrane is fixedly connected to the inside of the filter bucket.

Preferably, it also includes a card slot, a spring conflict block, a spring cavity, a connecting spring and a card block, the card slot runs through the outer wall of the slider, the spring conflict block is arranged inside the card slot, and its spring conflicts The block can be connected to the inside of the slot through the spring body on it, the spring chamber is opened on the inner wall of the filter chamber, one end of the connection spring is fixedly connected to the inside of the spring chamber, and the block is fixedly connected to the connection spring The other end of the locking block is slidably connected to the inside of the spring cavity, and the locking block and the inside of the locking groove are engaged with each other.

Preferably, it also includes a recovery tank, a pressing spring, a sealing ring, a groove, a sealing spring and a sealing barrel, the recovery tank is set at the bottom of the slider, and the pressing spring is fixedly connected to the inside of the recovery tank , the blocking ring is fixedly connected to the bottom of the pressing spring, the top of the blocking ring is slidably connected to the inside of the recovery groove, the groove is opened in the middle of the filter chamber, and the top of the blocking spring is fixedly connected to the Inside the filter chamber, the bottom of the blocking spring is fixedly connected to the outside of the blocking barrel, and the bottom of the blocking barrel abuts against the top of the slider.

Preferably, it also includes a fixed base, a clamping rod, a fixed spring, an abutment plate and a push-pull rod, the fixed base is fixedly connected to the outer wall of the needle core tube, and the middle part of the clamping rod is hinged on the outside of the fixed base end, the fixed plate is fixedly connected to the bottom of the clamping rod, the fixed spring is fixedly connected to the bottom of the needle core tube, the fixed spring is sleeved on the outer wall of the needle head, and the abutment plate is fixedly connected to the bottom of the fixed spring At the bottom end, the bottom of the push-pull rod is hinged at the four corners of the abutment plate, and the top of the push-pull rod is rotatably connected with the top of the clamping rod.

Preferably, it also includes a supporting plate, a clamping rod and a fixing groove, the supporting plate is fixedly connected to the upper surface of the abutting plate, the clamping rod is fixedly connected to the top of the supporting plate, and the fixing groove is opened in the fixing base The outer surface.

Preferably, the insides of the needle core tube, the needle, the input tube and the filter cavity are connected to each other to facilitate the input of the liquid medicine, and the middle part of the slider is provided with a hole that is suitable for the input tube, and the hole is Not less than three, play the effect of being able to replace filters not less than twice.

Preferably, both the sealing ring and the bottom of the sealing barrel are made of rubber structure, so as to achieve an effective sealing effect.

Preferably, the support plate has elasticity, a height difference is set between the vertical side groove and the inclined side groove of the fixing groove, and the distance between the bottom surface of the vertical side groove and the surface of the fixing seat is smaller than the bottom surface of the inclined side groove The distance from the surface of the fixed seat, the upper end of the inclined side groove and the upper end of the vertical side groove are connected through the transition groove, and the clamping rod can move inside the fixing groove and be clamped in the transition groove.

Compared with prior art, the beneficial effect of the present invention is:

1. During the flow of the liquid medicine or blood, the liquid medicine or blood will pass through the filter membrane in the inner hole of the slider, and the fat particles contained in the liquid medicine or blood can be filtered through the filter membrane, effectively preventing the fat particles from entering Into the bone marrow to prevent fat particles from accumulating inside the bone marrow and affecting the hematopoietic efficiency of the bone marrow;

2. Under the action of the pulling spring, the slider slides inside the limit chute. At this time, the hole of the first slider is far away from the middle of the filter cavity, and the second hole of the slider moves to the middle of the filter cavity. Under the stretching action of the connecting spring, the locking block moves to the inside of the slot of the second hole for clamping, thereby making the slider stop moving, realizing the effect of automatic replacement of the filter barrel, effectively preventing the filter barrel from being blocked in a timely manner. Replacement improves the input efficiency of liquid medicine or blood;

3. By pressing down the spring, the sealing ring contacts the groove downwards, and at the same time, the sealing spring makes the bottom of the sealing barrel contact the edge of the hole of the slider, so that the second hole of the slider can be in contact with the inside of the needle. Being able to be in a closed space, preventing the liquid medicine or blood from entering the inside of the filter cavity during the input of the liquid medicine or blood, preventing too much liquid medicine or blood from entering the inside of the filter cavity and affecting the operation of the device;

4. Since the middle part of the clamping rod is hinged with the fixing seat, when the top of the clamping rod moves outward, the bottom of the clamping rod moves inward, so that the fixing plate hugs the patient's leg, thereby improving the stability of the needle , can further reduce the problem of shaking after the needle is inserted into the human body, and improve the success rate of puncture;

5. Through the elastic rebound effect of the support plate, the clamping rod is clamped in the fixing groove, and then the clamping of the fixing plate is fixed, which effectively realizes the automatic fixing of the device, and further improves the needle insertion after puncture. connection stability.

Description of drawings

Fig. 1 is a three-dimensional schematic view of the overall structure of the present invention;

Fig. 2 is the three-dimensional schematic diagram of the overall structure of the present invention;

Fig. 3 is the enlarged schematic view of the structure at A place in Fig. 2 of the present invention;

Fig. 4 is a partial three-dimensional schematic diagram of the internal structure of the filter chamber of the present invention;

Fig. 5 is a partial three-dimensional schematic diagram of the positional relationship between the slider and the filter chamber of the present invention;

Fig. 6 is a partial three-dimensional schematic diagram of the inner hole of the slider structure of the present invention;

Fig. 7 is a schematic diagram of the internal structure of the slider slidingly connected in the filter chamber of the present invention;

Figure 8 is an enlarged schematic view of the structure at B in Figure 7 of the present invention;

Fig. 9 is a partial three-dimensional schematic diagram of the surrounding structure of the fixing seat and the fixing plate of the present invention;

Fig. 10 is an enlarged schematic diagram of the structure at C in Fig. 9 of the present invention;

Fig. 11 is a three-dimensional schematic diagram of the positional relationship between the limiting chute and the groove in the present invention;

Figure 12 is a schematic front view of the positional relationship between the clamping rod and the push-pull rod of the present invention;

Fig. 13 is a schematic front view of the clamping rod clamped in the fixing groove;

Fig. 14 is an enlarged schematic diagram of the structure at D in Fig. 10 of the present invention.

In the picture:

1. Needle tube; 2. Needle; 3. Input tube; 4. Filter cavity;

51, limit chute; 52, pull spring; 53, slide block; 541, detection spring; 542, filter bucket; 543, filter membrane; Connecting spring; 555, clamping block; 561, recovery groove; 562, pressing down spring; 563, sealing ring; 564, groove; 565, blocking spring; 566, blocking barrel;

611, fixed seat; 612, clamping rod; 613, fixed spring; 614, abutment plate; 615, push-pull rod; 62, fixed plate; 631, support plate; Vertical side groove; 635, transition groove.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

Embodiment one

Please refer to Figures 1 to 2, a device for preventing fat particles in bone marrow reinfusion fluid, including a needle core tube 1, the bottom of the needle core tube 1 is provided with a needle 2, the needle core tube 1, needle 2, input The insides of the tube 3 and the filter chamber 4 are interconnected to facilitate the input of the liquid medicine. An input tube 3 is provided on the outside of the needle core tube 1, and a filter cavity 4 is provided at the upper end of the input tube 3;

Referring to Fig. 3, Fig. 5 and Fig. 11, it also includes a limiting chute 51, a pulling spring 52 and a slider 53, and the inside of the filter chamber 4 is provided with a limiting chute 51 for limiting the sliding of the sliding block 53, and the pulling spring One end of 52 is fixedly connected in the inside of filter chamber 4, and the other end of pulling spring 52 is fixedly connected with the outer wall of slide block 53, and slide block 53 is slidably connected in the inside of filter chamber 4, and the middle part of slide block 53 is provided with input pipe 3 Compatible holes, no less than three holes, have the effect of being able to replace the filter no less than twice;

Referring to Figures 3 to 6, it also includes a detection spring 541, a filter barrel 542 and a filter membrane 543, the bottom end of the detection spring 541 is fixedly connected to the inside of the slider 53, and the filter barrel 542 is fixedly connected to the top of the detection spring 541 , the filter barrel 542 is slidably connected to the inside of the slider 53, and the filter membrane 543 is fixedly connected to the inside of the filter barrel 542;

Referring to Fig. 7 and Fig. 8, it also includes a card slot 551, a spring contact block 552, a spring chamber 553, a connecting spring 554 and a card block 555, the card slot 551 runs through the outer wall of the slider 53, and the spring contact block 552 It is arranged inside the slot 551, and the spring resistance block 552 can be connected to the inside of the slot 551 through the spring body on it. When the spring resistance block 552 is pushed by an external force, the spring body on it will be stretched, and the spring will The cavity 553 is set on the inner wall of the filter cavity 4, one end of the connecting spring 554 is fixedly connected to the inside of the spring cavity 553, the clamping block 555 is fixedly connected to the other end of the connecting spring 554, and the outer end of the clamping block 555 is slidingly connected to the spring cavity 553 Inside, the locking block 555 and the inside of the locking slot 551 are engaged with each other;

Referring to Fig. 2, Fig. 3 and Fig. 11, it also includes a recovery groove 561, a downward pressure spring 562, a sealing ring 563, a groove 564, a sealing spring 565 and a blocking barrel 566, and the recovery groove 561 is opened on the slider 53 bottom, the pressing down spring 562 is fixedly connected in the inside of recovery groove 561, and the sealing ring 563 is fixedly connected in the bottom of pressing down spring 562, and the bottom of sealing ring 563 and blocking barrel 566 are all set as rubber structure, can effectively sealing effect, the top of the sealing ring 563 is slidably connected to the inside of the recovery groove 561, the groove 564 is provided in the middle of the filter chamber 4, the top of the sealing spring 565 is fixedly connected to the inside of the filtering chamber 4, and the top of the sealing spring 565 The bottom is fixedly connected to the outside of the blocking barrel 566, and the bottom of the blocking barrel 566 abuts against the top of the slider 53;

Referring to Figure 9, Figure 10, Figure 12 and Figure 13, it also includes a fixed seat 611, a clamping rod 612, a fixed spring 613, an abutment plate 614 and a push-pull rod 615, and the fixed seat 611 is fixedly connected to the needle core tube 1 On the outer wall of the clamping rod 612, the middle part of the clamping rod 612 is hinged on the outer end of the fixing seat 611, the fixing plate 62 is fixedly connected to the bottom of the clamping rod 612, the fixing spring 613 is fixedly connected to the bottom of the needle core tube 1, and the fixing spring 613 is set on the On the outer wall of the needle head 2, the abutment plate 614 is fixedly connected to the bottom end of the fixed spring 613, the bottom of the push-pull rod 615 is hinged to the four corners of the abutment plate 614, and the top of the push-pull rod 615 is rotatably connected to the top of the clamping rod 612;

Referring to Figure 2, Figure 10, Figure 13 and Figure 14, it also includes a support plate 631, a clamping rod 632 and a fixing groove, the support plate 631 is fixedly connected to the upper surface of the abutment plate 614, the support plate 631 can be made of plastic, It has a certain degree of elasticity, and it can be bent and deformed by resistance. The clamping rod 632 is fixedly connected to the top of the support plate 631, and the fixing groove is provided on the outer surface of the fixing seat 611, between the vertical side groove 634 and the inclined side groove 633 of the fixing groove. There is a difference in height, that is, the distance between the bottom surface of the vertical side groove 634 and the surface of the fixed seat 611 is smaller than the distance between the bottom surface of the inclined side groove 633 and the surface of the fixed seat 611, and the upper end of the inclined side groove 633 and the vertical side groove The upper end of 634 is connected by a transition groove 635 , and the locking rod 632 can move inside the fixed groove and be clamped in the transition groove 635 .

Overall working principle of the present invention is as follows:

Referring to Fig. 3, in the initial state, the detection spring 541 makes the filter barrel 542 in the highest position;

Referring to Fig. 6 and Fig. 8, the connecting spring 554 makes the locking block 555 and the locking groove 551 engage with each other, and at this time, the slider 53 makes the pulling spring 52 in a stretched state;

9 and 12, the fixed spring 613 is in an uncompressed state, the abutment plate 614 is at the lowest position, the abutment plate 614 makes the top of the push-pull rod 615 pull the clamping rod 612 at the innermost side, and the top of the clamping rod 612 is at the innermost position. The bottom end is at the outermost side, and the clamping rod 612 makes the fixing plate 62 at the outermost side;

Referring to FIG. 10 , the support plate 631 makes the clamping rod 632 at the lowest position.

Referring to Figure 12, when working, after sterilizing the position to be punctured, position the position to be punctured, then align the needle 2 to the positioned puncture position, insert the needle 2 into the bone marrow of the leg of the human body, and when the needle 2 During the process of entering into the bone marrow, the lower surface of the abutment plate 614 is in contact with the skin of the patient’s leg. After being squeezed, the abutment plate 614 moves upward on the outer wall of the needle 2 and compresses the fixed spring 613. The abutment plate 614 Push the top of the clamping rod 612 upwards to move outwards through the push-pull rod 615. Since the middle part of the clamping rod 612 is hinged with the fixed seat 611, when the top of the clamping rod 612 moves outward, the bottom of the clamping rod 612 moves inward. , to realize that the fixing plate 62 embraces the patient's leg, thereby improving the stability of the needle 2 during puncture, further reducing the problem of shaking after the needle 2 is inserted into the human body, and improving the success rate of puncture;

Please refer to Fig. 10, Fig. 13 to Fig. 14, the abutting plate 614 drives the clamping rod 632 to move upward to the position a of the inclined side groove 633 through the supporting plate 631, and along with the clamping rod 632 obliquely upward along the inclined The movement will pass through position b. When the clamping rod 632 slides to the highest position c of the transition groove 635, under the elastic rebound of the support plate 631, the clamping rod 632 will move to the left at the position c of the transition groove 635. When the overall device is loosened again, the abutment plate 614 moves downward on the outer wall of the needle 2 under the action of the elastic reset of the fixed spring 613, and the abutment plate 614 drives the clamping rod 632 at the c of the transition groove 635 through the support plate 631. The position at the position moves downward, and at the same time, the elastic rebound of the support plate 631 drives the clamping rod 632 to slide to the left at the position d of the transition groove 635, so that the clamping rod 632 is engaged in the interior of the transition groove 635; Fixing by clamping, effectively realizes the automatic fixing of the device, and improves the stability of the insertion of the needle 2 after puncture;

When it is necessary to release the clamping state of the clamping rod 632, the whole device is pressed down again at this time, and the fixed spring 613 is compressed, and the abutment plate 614 is in contact with the skin surface of the patient's leg and cannot move. The support plate 631 will move upwards, and at this time, the lever 632 on the top of the support plate 631 will slide to the position e inside the transition groove 635, and the originally bent support plate 631 will drive the lever 632 in the transition groove in the elastic rebound. The position at e of 635 moves to the left. At this time, the overall device is released, and the needle core tube 1 moves upward under the elastic return action of the fixed spring 613, and the clamping rod 632 will slide downward at the vertical side groove 634. The position at f of the vertical side groove 634 will return to the position at a of the inclined side groove 633, and finally the clamping rod 632 is no longer in contact with the fixing groove, and at this time a fixed clamping of the device is completed;

Referring to Figure 2 and Figure 5, insert the infusion tube into the top of the infusion tube 3, at this time, the medicinal solution or blood is input into the interior of the infusion tube 3, and the medicinal solution or blood enters the human body through the needle 2. At the bone marrow, the therapeutic effect is achieved. During the process of the medicinal liquid or blood passing through the inside of the input tube 3, the medicinal liquid or blood will pass through the filter membrane 543 in the inner hole of the slider 53, and the filter membrane 543 can treat the medicinal liquid or blood. The fat particles contained in the blood are filtered to effectively prevent the fat particles from entering the bone marrow and prevent the accumulation of fat particles in the bone marrow to affect the hematopoietic efficiency of the bone marrow. During the continuous filtering of fat particles, fat particles may accumulate and block the filter the upper surface of the membrane 543;

Referring to Figure 3 and Figure 8, when the upper surface of the filter membrane 543 accumulates and blocks too many fat particles, the water resistance during the infusion process of the filter membrane 543 will increase, and the filter membrane 543 will make the filter barrel 542 moves downward in the hole of the slider 53 and compresses the detection spring 541. When the filter barrel 542 moves down to contact with the spring resistance block 552, the filter barrel 542 presses the spring resistance block 552 and moves outward in the slot 551. , the spring resistance block 552 pushes the block 555 away from the inside of the slot 551 and compresses the connection spring 554, so that the block 555 cannot be engaged with the inside of the slot 551;

Referring to Fig. 5, Fig. 6 and Fig. 8, under the action of the pulling spring 52, the slider 53 slides inside the limiting chute 51, at this time the hole of the first slider 53 is far away from the middle of the filter chamber 4, After the second hole on the slider 53 moves toward the middle of the filter cavity 4, the clamping block 555 moves to the inside of the slot 551 of the second hole under the stretching action of the connecting spring 554 to engage, thereby making the slider 53 stop The movement realizes the effect of automatically replacing the filter barrel 542, effectively prevents the filter barrel 542 from being blocked and cannot be replaced in time, and improves the input efficiency of the liquid medicine or blood;

Referring to Fig. 3, when the second hole on the slider 53 moves to the middle of the filter cavity 4 and aligns with the filter cavity 4, the spring 562 is pressed down at this time so that the blocking ring 563 abuts against the groove 564 downward, and at the same time The blocking spring 565 makes the bottom of the blocking barrel 566 abut against the edge of the hole of the slide block 53, so that the second hole of the slide block 53 and the inside of the needle 2 can be in a closed space, preventing the liquid medicine or blood from entering. During the process, the liquid medicine or blood enters the inside of the filter cavity 4 to prevent too much liquid medicine or blood from entering the inside of the filter cavity 4 and affecting the operation of the device.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. any such actual relationship or order exists between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (9)

1. An infusion device for preventing fat particles in bone marrow reinfusion, which comprises a needle core tube (1), and is characterized in that: a needle head (2) is arranged at the bottom of the needle core pipe (1), an input pipe (3) is arranged on the outer side of the needle core pipe (1), and a filter cavity (4) is arranged at the upper end of the input pipe (3);

still including spacing spout (51), pulling spring (52) and slider (53), be used for injecing gliding spacing spout (51) of slider (53) is offered to the inside of filter chamber (4), the one end fixed connection of pulling spring (52) is in the inside of filter chamber (4), the other end of pulling spring (52) and the outer wall fixed connection of slider (53), slider (53) sliding connection is in the inside of filter chamber (4).

2. The device of claim 1, wherein the device is used for preventing fat particles in bone marrow reinfusion, and comprises: still including detecting spring (541), filter vat (542) and filter membrane (543), the bottom fixed connection of detecting spring (541) is in the inside of slider (53), filter vat (542) fixed connection is at the top of detecting spring (541), filter vat (542) sliding connection is in the inside of slider (53), filter membrane (543) fixed connection is in the inside of filter vat (542).

3. The apparatus for preventing the introduction of fat particles into bone marrow reinfusion as set forth in claim 1, wherein: the filter element is characterized by further comprising a clamping groove (551), a spring abutting block (552), a spring cavity (553), a connecting spring (554) and a clamping block (555), wherein the clamping groove (551) penetrates through the outer wall of the sliding block (53), the spring abutting block (552) is arranged inside the clamping groove (551), the spring cavity (553) is arranged on the inner wall of the filter cavity (4), one end of the connecting spring (554) is fixedly connected inside the spring cavity (553), the clamping block (555) is fixedly connected at the other end of the connecting spring (554), the outer side end of the clamping block (555) is slidably connected inside the spring cavity (553), and the clamping block (555) and the clamping groove (551) are clamped with each other.

4. The apparatus for preventing the introduction of fat particles into bone marrow reinfusion as set forth in claim 1, wherein: still including accumulator (561), push down spring (562), shutoff ring (563), recess (564), shutoff spring (565) and shutoff bucket (566), accumulator (561) are seted up in slider (53) bottom, push down spring (562) fixed connection is in accumulator (561) inside, shutoff ring (563) fixed connection is in the bottom of push down spring (562), the top sliding connection of shutoff ring (563) is in accumulator (561) inside, recess (564) are seted up in the middle part of filter chamber (4), the top fixed connection of shutoff spring (565) is in filter chamber (4) inside, the bottom of shutoff spring (565) and the outside fixed connection of shutoff bucket (566), the bottom of shutoff bucket (566) and the top butt of slider (53).

5. The apparatus for preventing the introduction of fat particles into bone marrow reinfusion as set forth in claim 1, wherein: the needle clamping device is characterized by further comprising a fixing seat (611), a clamping rod (612), a fixing spring (613), a butt plate (614) and a push-pull rod (615), wherein the fixing seat (611) is fixedly connected to the outer wall of the needle core tube (1), the middle of the clamping rod (612) is hinged to the outer side end of the fixing seat (611), the fixing plate (62) is fixedly connected to the bottom of the clamping rod (612), the fixing spring (613) is fixedly connected to the bottom of the needle core tube (1), the fixing spring (613) is sleeved on the outer wall of the needle (2), the butt plate (614) is fixedly connected to the bottom end of the fixing spring (613), the bottom of the push-pull rod (615) is hinged to four corners of the butt plate (614), and the top of the push-pull rod (615) is rotatably connected with the top end of the clamping rod (612).

6. The device of claim 5, wherein the device is used for preventing fat particles in bone marrow reinfusion, and comprises: still including backup pad (631), kelly (632) and fixed slot, backup pad (631) fixed connection is at the upper surface of butt board (614), kelly (632) fixed connection is at the top of backup pad (631), the fixed slot is seted up at the surface of fixing base (611).

7. The device of claim 1, wherein the device is used for preventing fat particles in bone marrow reinfusion, and comprises: the needle core pipe (1), the needle head (2), the input pipe (3) and the filter chamber (4) are communicated with each other, the middle of the sliding block (53) is provided with holes matched with the input pipe (3), and the number of the holes is not less than three.

8. The apparatus of claim 4, wherein the apparatus is adapted to prevent fat particles from entering bone marrow back infusion: the bottom of the blocking ring (563) and the bottom of the blocking barrel (566) are both of a rubber structure.

9. The apparatus of claim 6, wherein the apparatus is adapted to prevent fat particles from entering bone marrow back infusion: the supporting plate (631) has elasticity, a height difference is arranged between the vertical side groove (634) and the inclined side groove (633) of the fixing groove, the distance between the bottom surface of the vertical side groove (634) and the surface of the fixing seat (611) is smaller than the distance between the bottom surface of the inclined side groove (633) and the surface of the fixing seat (611), and the upper end of the inclined side groove (633) is connected with the upper end of the vertical side groove (634) through a transition groove (635); the clamping rod (632) can move in the fixing groove and is clamped in the transition groove (635).

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