CN113456118B - Device for Pediatric Bone Marrow Biopsy - Google Patents

Abstract

The invention discloses a device for bone marrow biopsy for pediatrics, which comprises a tube sleeve (6) fixed on a needle, wherein a round hole (7) is formed at one end of the tube sleeve (6), first clamping blocks (8) are uniformly arranged on the inner wall of the other end of the tube sleeve (6), side rods (9) are uniformly arranged on the outer wall of the tube sleeve (6) close to the round hole (7), positioning rings (10) are arranged on the side rods (9), and a first limiting ring (11) is arranged on the inner wall of the tube sleeve (6) close to the round hole (7); the needle head (4) is provided with a positioning sleeve (12). The invention can effectively and stably extract the marrow cell sample and improve the sampling efficiency.

Description

Device for Pediatric Bone Marrow Biopsy

technical field

The invention relates to the technical field of pediatric equipment, in particular to a device for pediatric bone marrow biopsy.

Background technique

Bone marrow biopsy is referred to as bone marrow biopsy, which is mainly divided into two parts, one is bone marrow biopsy, and the other is bone marrow smear examination. Bone marrow biopsy is to use a special puncture needle to take a small piece of cylindrical bone marrow tissue for pathological examination, while bone marrow smear is to use a suction tube to aspirate the bone marrow, take it out and do a smear test. The existing bone marrow biopsy apparatus mainly includes a needle tube, and the head of the needle tube is provided with a replaceable needle head and a suction head. When performing a bone marrow biopsy, the needle is screwed on and inserted into the patient's spine to take a piece of bone marrow tissue for biopsy of the bone marrow tissue. When a bone marrow smear is required, the suction head is put on to extract the bone marrow, and a smear of the bone marrow fluid is performed. However, the existing bone marrow fluid suction head generally uses a needle to directly insert the patient's surgical site and absorb the bone marrow. After taking it out, a smear test is performed. Because the existing device is not provided with a positioning support mechanism, when the push rod in the syringe is pulled, it will make The needle shakes to a certain extent, which often aggravates the pain of the patient's surgical site, and also causes greater damage to the surgical site. Such pain is unbearable for children. Children's bodies will have a struggling reaction, which leads to sampling Difficulty at work. Existing devices often do not have a better stress point when taking samples, which makes sampling more time-consuming and reduces sampling efficiency.

Contents of the invention

The object of the present invention is to provide a device for pediatric bone marrow biopsy. The invention can effectively and stably extract bone marrow cell samples and improve sampling efficiency.

The technical solution of the present invention: a device for bone marrow biopsy in pediatrics, including a needle tube, a push rod is arranged inside the needle tube, a needle fixing part is arranged at one end of the needle tube, a needle is arranged inside the needle fixing part, and a handle is arranged on the needle fixing part , the needle is covered with a biopsy head or a suction head, the biopsy head includes a biopsy tube body, a channel is provided in the biopsy tube body, a tapered portion is provided at the end of the biopsy tube body, and an opening is provided on the tapered portion, and the opening and The channels are connected; the suction head includes a sleeve fixed on the needle, one end of the sleeve is provided with a round hole, and the inner wall of the other end of the sleeve is uniformly provided with a first block, and the sleeve is close to The outer wall of the round hole is uniformly provided with side rods, the side rods are provided with a positioning ring, the inner wall of the tube sleeve and close to the circular hole is provided with a first limiting ring; the needle is provided with a positioning sleeve, A protruding spring is provided inside the sleeve, one end of the protruding spring is in contact with the first limiting ring, and the other end of the protruding spring is in conflict with the positioning sleeve; the needle is provided with a rubber sleeve near the needle fixing part, A plurality of second clamping blocks are uniformly arranged on the rubber sleeve, and the first clamping blocks cooperate with the second clamping blocks; the needle tube is provided with a sealing mechanism.

In the above pediatric bone marrow biopsy device, the handle includes a main body on a fixed needle fixing part, and side bodies are provided on both sides of the main body.

In the aforementioned pediatric bone marrow biopsy device, the main body is provided with an anti-slip strip.

In the aforementioned pediatric bone marrow biopsy device, one end of the first block has a first slope, and one end of the second block has a second slope.

In the aforementioned pediatric bone marrow biopsy device, a circular protrusion is provided on the end surface of the positioning ring.

In the aforementioned pediatric bone marrow biopsy device, the sealing mechanism includes a support rod fixed in the needle tube, a support member is provided on the support rod, a collar is provided on the support member, a return spring is provided on the collar, and the return spring One end of the needle tube is connected with a closed ball, and the closed ball is clamped in the through hole between the needle tube and the needle head fixing part, and the closed ball is provided with a connecting ring; the needle tube is provided with an adjusting tube, and the adjusting tube is threadedly connected with an adjusting block, An adjusting button is arranged on the adjusting block, a string is connected to the lower end of the adjusting block, and one end of the string is tied on the connecting ring.

In the aforementioned pediatric bone marrow biopsy device, a sealing ring is provided on the through hole between the needle tube and the needle fixing part.

In the aforementioned pediatric bone marrow biopsy device, the string is set through a support.

Compared with the prior art, the present invention has the following advantages:

1. In the present invention, first put the positioning ring of the cannula against the patient’s desired inspection site, pinch the handle to push the needle tube forward, the positioning sleeve on the needle moves forward and squeezes out the spring, and the needle passes through the round hole Stretch out, then penetrate into the patient's skin, and go deep into the bone marrow tissue. At the same time, the first block in the sleeve and the second block on the rubber sleeve are misaligned. Turn the needle tube, the first block and the second block At this time, the needle is effectively positioned; pull the push rod outward to form a negative pressure state in the tube, and the bone marrow tissue is extracted into the needle tube; Under the action, the first block and the second block return to the misaligned state, and the needle retracts into the sleeve to complete the sampling. Through this structural form, a better stress point can be formed when the needle is inserted, which is effective and Steady extraction of bone marrow tissue improves sampling efficiency.

2. The handle includes a main body on a fixed needle fixing part, side bodies are provided on both sides of the main body, and anti-slip strips are provided on the main body, so that the medical staff can hold it stably when operating Needle.

3. A circular protrusion is provided on the end surface of the positioning ring, so that the present invention can prevent slipping when it touches the patient's skin.

4. A sealing ring is provided on the through hole between the needle tube and the needle head fixing part to improve the sealing effect of the sealing ball on the through hole, so that the bone marrow fluid flowing into the needle tube will not flow back out.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the schematic diagram that stretches out spring;

Fig. 3 is the schematic diagram of the first block and the second block;

Fig. 4 is the structural representation of sealing mechanism;

Fig. 5 is the schematic diagram of biopsy head;

6 is a schematic diagram of the end of the biopsy head;

Explanation of symbols in the drawings: 1-needle tube, 2-push rod, 3-needle head fixing part, 4-needle head, 5-handle, 6-tube sleeve, 7-round hole, 8-first block, 9-side Rod, 10-positioning ring, 11-first limit ring, 12-positioning sleeve, 13-extending spring, 14-rubber sleeve, 15-second block, 16-sealing mechanism, 17-first slope, 18 -Second slope, 19-support rod, 20-support member, 21-collar, 22-return spring, 23-closed ball, 24-connecting ring, 25-adjusting tube, 26-adjusting block, 27-adjusting knob, 28-string, 29-sealing ring, 501-main body, 502-side body, 503-anti-slip strip, 101-round protrusion, 30-biopsy head, 301-biopsy tube, 302-channel, 303- Taper, 304 - Opening.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and examples, but not as a basis for limiting the present invention.

Embodiment: The device for pediatric bone marrow biopsy, as shown in FIG. The needle fixing part 3 is provided with a handle 5, and the needle 4 is covered with a biopsy head 30 or a suction head; the suction head includes a sleeve 6 fixed on the needle, and one end of the sleeve 6 is provided with a round hole 7 The inner wall of the other end of the pipe sleeve 6 is evenly provided with a first block 8, and the outer wall of the pipe sleeve 6 close to the round hole 7 is evenly provided with a side bar 9, and a positioning ring 10 is provided on the side bar 9, The end face of the positioning ring 10 is provided with a circular protrusion 101, so that the present invention plays an anti-slip effect when touching the patient's skin, ensuring the stability of sample extraction; The inner wall of the hole 7 is provided with a first stop ring 11; the needle 4 is provided with a positioning sleeve 12, and the sleeve 6 is provided with an extension spring 13, as shown in Figure 2, one end of the extension spring 13 is connected to the The first limit ring 11 is in contact, and the other end of the spring 13 is in conflict with the positioning sleeve 12; the needle 4 is provided with a rubber sleeve 14 near the needle fixing part 3, and the rubber sleeve 14 is evenly provided with a plurality of The second block 15, as shown in Figure 3, the first block 8 is matched with the second block 15, one end of the first block 8 has a first slope 17, and one end of the second block 15 has a first slope Two bevels 18, when the two blocks are mated, the two bevels fit each other, and the inclination is not large. The bevel is set so that the needle tube can rotate in one direction when rotating, so that the rotation and positioning are more accurate. The first There are four sets of clamping blocks and second clamping blocks; the needle tube 1 is provided with a sealing mechanism 16 . The handle 5 includes a main body 501 on the fixed needle fixing part 3, side body parts 502 are provided on both sides of the main body 501, and an anti-slip strip 503 is provided on the main body 501, when the medical staff is operating Can hold the needle tube steadily.

The sealing mechanism 16 includes a support rod 19 fixed in the needle tube 1. As shown in FIG. Spring 22, one end of return spring 22 is connected with closed ball 23, and closed ball 23 is clamped in the through hole between needle tube 1 and needle head fixing part 3, and closed ball 23 is provided with connecting ring 24; Described needle tube 1 is provided with Adjusting tube 25 is arranged, and adjusting block 26 is threadedly connected in adjusting tube 25. Adjusting block 26 is provided with adjusting button 27. The lower end of adjusting block 26 is connected with string 28, and one end of string 28 is tied on the connecting ring 24. Turn the adjustment button to make the adjustment block move upwards, the string is pulled, the sealing ball moves to one side, the through hole is opened, bone marrow fluid flows into the needle tube, turn the adjustment button, the moving block moves downward, the sealing ball blocks the through hole, The needle tube is in a closed state, and the through hole between the needle tube 1 and the needle head fixing part 3 is provided with a sealing ring 29 to improve the sealing effect of the sealing ball on the through hole, so that the bone marrow fluid flowing into the needle tube will not flow back out. The thin rope 28 is set through the support member 20. Compared with passing through the return spring, this position is beneficial to the protection of the string body. When the thin rope touches, it will not easily cut the thin rope, which improves the service life. As shown in Figures 5 and 6, the biopsy head 30 includes a biopsy tube 301, a channel 302 is provided in the biopsy tube 301, a tapered portion 303 is provided at the end of the biopsy tube 301, and a tapered portion 303 is provided on the tapered portion 303. There is an opening 304, and the opening 304 communicates with the channel 302. The end of the device is replaced with a biopsy head, and the biopsy head is used to extract bone marrow tissue. The bone marrow suction structure at the front end of the present invention can be removed, and the biopsy head is connected to the patient. During inspection, a needle is connected to the front end of the device of the present invention, and the needle is penetrated into the human bone to obtain bone marrow tissue and pathological examination, then the needle is replaced, a suction head is installed, and the bone marrow is extracted as a sample for bone marrow smear inspection; Both steps are necessary operations for bone marrow biopsy, and the present invention is mainly aimed at the structural design of the device for bone marrow smear examination.

The working principle of the present invention: in the present invention, the sealing mechanism is in the open state, firstly, the positioning ring of the cannula is pressed against the patient’s desired inspection site, the handle is pinched to push the needle tube forward, and the positioning sleeve on the needle moves forward and squeezes Press out the spring, the needle protrudes from the round hole, and then penetrates into the patient's skin and penetrates deep into the bone marrow tissue. The needle tube, the end of the first block and the second block are close to each other, and the needle head is effectively positioned at this time; pull the push rod outward to form a negative pressure state in the tube, and the bone marrow fluid is sucked into the needle tube; Pull the needle tube outward, and at the same time, under the action of the extending spring, the first block and the second block return to the misaligned state, the needle retracts into the sleeve, the sealing mechanism is closed, the needle tube is in a sealed state, and the sampling is completed. The structural form enables a better force point when the needle is inserted, effectively and stably extracts bone marrow tissue, and improves sampling efficiency.

Claims (7)

1. The device for the bone marrow biopsy for the paediatrics comprises a needle tube (1), wherein a push rod (2) is arranged in the needle tube (1), a needle head fixing part (3) is arranged at one end of the needle tube (1), a needle head (4) is arranged in the needle head fixing part (3), a handle (5) is arranged on the needle head fixing part (3), and a suction head is sleeved on the needle head (4); the method is characterized in that: the suction head comprises a tube sleeve (6) fixed on the needle head, a round hole (7) is formed in one end of the tube sleeve (6), first clamping blocks (8) are uniformly arranged on the inner wall of the other end of the tube sleeve (6), side rods (9) are uniformly arranged on the outer wall of the tube sleeve (6) close to the round hole (7), positioning rings (10) are arranged on the side rods (9), and a first limiting ring (11) is arranged on the inner wall of the tube sleeve (6) close to the round hole (7); a positioning sleeve (12) is arranged on the needle head (4), an extending spring (13) is arranged in the sleeve (6), one end of the extending spring (13) is contacted with the first limiting ring (11), and the other end of the extending spring (13) is abutted against the positioning sleeve (12); the needle (4) is provided with a rubber sleeve (14) close to the needle fixing part (3), the rubber sleeve (14) is uniformly provided with a plurality of second clamping blocks (15), and the first clamping blocks (8) are matched with the second clamping blocks (15); a sealing mechanism (16) is arranged in the needle tube (1); one end of the first clamping block (8) is provided with a first inclined plane (17), and one end of the second clamping block (15) is provided with a second inclined plane (18).

2. The pediatric bone marrow biopsy device of claim 1, wherein: the handle (5) comprises a main body part (501) on the fixed needle fixing part (3), and two sides of the main body part (501) are provided with side body parts (502).

3. The pediatric bone marrow biopsy device of claim 2, wherein: the main body part (501) is provided with an anti-slip strip (503).

4. The pediatric bone marrow biopsy device of claim 1, wherein: the end face of the positioning ring (10) is provided with a circular protrusion (101).

5. The pediatric bone marrow biopsy device of claim 1, wherein: the sealing mechanism (16) comprises a supporting rod (19) fixed in the needle tube (1), a supporting piece (20) is arranged on the supporting rod (19), a lantern ring (21) is arranged on the supporting piece (20), a reset spring (22) is arranged on the lantern ring (21), one end of the reset spring (22) is connected with a sealing ball (23), the sealing ball (23) is clamped in a through hole between the needle tube (1) and the needle head fixing part (3), and a connecting ring (24) is arranged on the sealing ball (23); the needle tube (1) is provided with an adjusting tube (25), an adjusting block (26) is connected in the adjusting tube (25) through threads, an adjusting button (27) is arranged on the adjusting block (26), the lower end of the adjusting block (26) is connected with a string (28), and one end of the string (28) is tied on the connecting ring (24).

6. The pediatric bone marrow biopsy device of claim 5, wherein: a sealing ring (29) is arranged on the through hole between the needle tube (1) and the needle head fixing part (3).

7. The pediatric bone marrow biopsy device of claim 5, wherein: the string (28) is provided by a support (20).