CN217447857U - Sawtooth type sleeve biopsy needle - Google Patents

Abstract

The utility model relates to the technical field of medical instruments, in particular to a serrated cannula biopsy needle. The specific technical scheme is as follows: a serrated trocar biopsy needle, comprising a puncture needle, an inner trocar core and a cutter head stop cap arranged in the puncture needle needle tube, one end of the puncture needle is a needle tip, and the needle tip is in a conical structure, There are thin blades on both sides of the needle tip, the front end of the puncture needle is provided with a groove opening, the shape of the groove mouth is parallelogram, and the rear end of the puncture needle is provided with an outer snap ring; An outer snap ring is provided, and the inner trocar core is sleeved in the puncture needle needle tube for coaxial matching connection; the cutter head stop cap is provided with an inner snap groove, which is connected with the outer snap ring of the inner trocar core by interference, and the cutter head is provided with an inner snap ring. The stop cap is set in the needle tube of the puncture needle by means of a friction sleeve. The utility model has the advantages of strong cutting continuity, can control the puncture depth of the biopsy needle, etc., can avoid unnecessary repeated rotary cutting, and shorten the operation time.

Description

A serrated cannula biopsy needle

technical field

The utility model relates to a serrated cannula biopsy needle, in particular to a serrated cannula biopsy needle for breast biopsy.

Background technique

Biopsy is currently the gold standard for diagnosing breast cancer, that is, in the diagnosis of breast cancer, specific medical instruments are used to obtain tissue samples from breast lesions, and pathological analysis of the obtained samples is performed.

At present, most of the biopsy needles on the market have problems such as large cutting wound, discontinuous cutting, low cutting efficiency, tearing and damaging tissue during the operation, and the inability to control the puncture depth of the biopsy needle. There are adverse effects on later rehabilitation.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the utility model provides a serrated trocar biopsy needle, which solves the problems of the prior art that the cutting wound is large, the cutting is discontinuous and the puncture depth of the biopsy needle cannot be controlled.

In order to realize the above-mentioned purpose, the utility model is realized through the following technical solutions:

The utility model discloses a serrated trocar biopsy needle, which comprises a puncture needle, an inner trocar core and a cutter head stop cap. The utility model is characterized in that: the puncture needle has a tapered structure, and two sides of the needle tip are provided with thin blade blades The front end of the puncture needle is provided with a groove mouth, which is a parallelogram groove mouth, the rear end of the puncture needle is provided with an outer snap ring, and the biopsy needle is connected with the biopsy device through the outer snap ring; The trocar core and cutter head stop the cap.

Preferably, the front end surface of the inner trocar core is a serrated surface, the serrations of the serrated surface are circumferentially distributed at the front end of the inner trocar core, an outer snap ring is arranged beside the serrations, and the inner trocar core is sleeved on the puncture The needle and needle tube are coaxially mated and connected.

When the front end of the inner trocar core covers the parallelogram groove opening at the front end of the puncture needle, a vacuum inner lumen is formed between the inner trocar core and the puncture needle, and the puncture needle needle tube in front of the vacuum inner lumen is the outer tube The vacuum inner lumen can allow some diseased tissue to enter the outer lumen.

Preferably, the outer lumen is in communication with the vacuum inner lumen.

Driven by the transmission system of the biopsy device, the inner trocar core performs axial rotation and linear motion in the puncture needle tube, and the zigzag surface of the front end surface of the inner trocar core spirally advances to form a zigzag biopsy needle.

Preferably, the cutter head stopping cap is provided with an inner snap groove, which is connected with the outer snap ring beside the serrations at the front end of the inner trocar core by interference; the cutter head stopping cap drives the inner trocar core to move in the transmission system of the biopsy device With the assistance of US and MRI equipment, the inner trocar core can be stopped at the lesion point in time, and the tissue in the inner trocar core after sampling can be sealed, so as to better preserve the collected data. tissue samples.

The advantages of the present invention are: the present invention creatively uses a serrated cannula biopsy needle, which makes the entire biopsy action smoother, the cutting wound is smaller, the continuity is better, the rotational cutting efficiency is higher, and the puncture depth of the biopsy needle can be controlled, Reduced operation time.

Description of drawings

Fig. 1 is a schematic perspective view of the structure of a serrated trocar biopsy needle.

Figure 2 is a three-dimensional schematic diagram of a puncture needle structure of a serrated cannula biopsy needle.

3 is a three-dimensional schematic diagram of the structure of the inner trocar core of a serrated trocar biopsy needle and a partial view of the serrated surface of the front end of the inner trocar core.

Fig. 4 is a three-dimensional schematic diagram of the structure of the stop cap of the cutter head of a serrated trocar biopsy needle.

In the figure: 1. Puncture needle, 2. Puncture needle tip, 3. Thin blade, 4. Parallelogram groove opening, 5. Puncture needle outer snap ring, 6. Inner trocar core, 7. Inner trocar The front end of the core is serrated, 8. The vacuum inner lumen, 9. The outer lumen, 10. The cutter head stops the cap, 11. The outer snap ring next to the serrations of the inner trocar core, 12. The cutter head stops the inner groove of the cap.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is further described:

As shown in FIG. 1 , the present invention provides a serrated trocar biopsy needle, which includes a puncture needle 1 , an inner trocar core 6 and a cutter head stop cap 10 . The inner trocar core 6 is sheathed in the puncture needle tube for coaxial connection, and the cutter head stop cap 10 is sheathed in the puncture needle tube by friction.

As shown in Figure 2, the puncture needle tip 2 is in a conical structure, the two sides of the needle tip 2 are provided with a thin blade 3, and the front end of the puncture needle 1 is provided with a groove opening, which is a parallelogram groove opening 4, and the puncture needle 1 is provided with a groove opening. An outer snap ring 5 is provided at the rear end of the needle, and the biopsy needle is connected to the biopsy device through the outer snap ring 5 .

As shown in FIG. 3 , the front end surface of the inner trocar core 6 is a serrated surface, the serrations 7 on the serrated surface are circumferentially distributed on the front end surface of the inner trocar core 6 , and an outer snap ring 11 is provided beside the serrations.

When the front end of the inner trocar core 6 covers the parallelogram groove opening 4 at the front end of the puncture needle, a vacuum inner lumen 8 is formed between the inner trocar core 6 and the puncture needle 1 . The puncture needle tube is an outer lumen 9 , the vacuum inner lumen 8 can make some diseased tissue enter the outer lumen 9 , and the outer lumen 9 and the vacuum inner lumen 8 are in communication.

As shown in FIG. 4 , the cutter head stopping cap 10 is provided with an inner clamping slot 12 , and the cutter head stopping cap 10 is set in the puncture needle tube by means of friction.

Driven by the transmission system of the biopsy device, the inner trocar core 6 performs axial rotation and linear motion in the puncture needle tube, and the serrations 7 on the front end surface of the inner trocar core spiral forward to form a serrated biopsy needle.

When the drive system of the biopsy device drives the inner trocar core 6 to perform axial rotation and linear motion, the cutter head stopping cap 10 can make the inner trocar core 6 stop at the lesion point in time with the assistance of US and MRI equipment. Control the puncture depth of the biopsy needle. After the sampling is completed, the cutter head stops the inner clamping groove 12 of the cap and the outer clamping ring 11 beside the serrations 7 at the front end of the inner trocar core with interference fit, so as to seal the sample after sampling, so as to improve the efficiency of the sampling process. Good preservation of collected tissue samples.

As shown in FIG. 1, the puncture needle 1 and the inner trocar core 6 are coaxially installed, and the end face of the inner trocar core 6 can completely cover the parallelogram groove opening 4 of the puncture needle, forming a vacuum inner lumen 8, and the vacuum The puncture needle tube in front of the inner lumen 8 is the outer lumen 9. The vacuum inner lumen 8 can make some diseased tissue enter the outer lumen 9. After coaxial installation, the vacuum inner lumen 8 and the outer lumen 9 are combined, and the biopsy is performed. Driven by the device transmission system, the inner trocar core 6 performs axial rotation and linear motion in the puncture needle tube, and the front serrations 7 of the inner trocar core and the puncture needle 1 together form a serrated biopsy needle.

A serrated trocar biopsy needle of the present utility model is composed of a serration 7 at the front end of an inner trocar core and a puncture needle 1 to form a serrated biopsy needle. The whole process of serrated biopsy.

In the description of the present invention, it should be understood that the terms "inside", "outside", "front", "rear" and the like indicate the orientation or positional relationship based on the orientation and positional relationship shown in the accompanying drawings, and are only for description The present invention does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present invention.

Claims (5)

1. A serrated trocar biopsy needle, comprising a puncture needle (1), an inner trocar core (6) and a cutter head stop cap (10), characterized in that: the puncture of the puncture needle (1) The needle tip (2) has a conical structure, the two sides of the needle tip are provided with a thin blade (3), the front end of the puncture needle is provided with a groove opening, the groove opening is a parallelogram groove opening (4), and the rear end of the puncture needle is provided with a groove opening (4). A puncture needle outer clasp (5) is provided, and the biopsy needle is connected to the biopsy device through the puncture needle outer clasp (5); an inner trocar core (6) and a cutter head stop cap (10) are arranged in the puncture needle needle tube . 2. A serrated trocar biopsy needle according to claim 1, characterized in that: the front end surface of the inner trocar core is a serrated surface, and the serrations (7) on the front end surface of the inner trocar core are circumferential Distributed at the front end of the inner trocar core (6), an outer snap ring (11) beside the serrations of the inner trocar core is arranged beside the serrations, and the inner trocar core sleeve (6) is arranged in the puncture needle tube for coaxial matching and connection. 3. A serrated trocar biopsy needle according to claim 2, characterized in that: when the serrated surface of the front end of the inner trocar core (6) covers the parallelogram groove opening (4) at the front end of the puncture needle , a vacuum inner lumen (8) is formed between the inner trocar core (6) and the puncture needle (1), and the puncture needle needle tube before the vacuum inner lumen (8) is an outer lumen (9), and the vacuum inner lumen (8). The lumen (8) enables part of the diseased tissue to enter the outer lumen (9), and the outer lumen (9) communicates with the vacuum inner lumen (8). 4. A kind of serrated trocar biopsy needle according to claim 3, characterized in that: driven by the biopsy device transmission system, the inner trocar core (6) is axially rotated and rotated in the puncture needle tube. Straight line movement, the serrations (7) on the front end surface of the inner trocar core spirally advance to form a serrated biopsy needle. 5. A serrated trocar biopsy needle according to claim 1, characterized in that: the cutter head stopping cap (10) is provided with an inner clamping groove (12), which is serrated with the front end of the inner trocar core (7) The outer snap ring (11) beside the serration of the inner trocar core is connected by interference; the cutter head stops the cap (10) when the transmission system of the biopsy device drives the inner trocar core (6) to rotate axially and linearly , with the assistance of US and MRI equipment, the inner trocar core (6) can be stopped at the lesion point in time, and the tissue samples in the sampled inner trocar core (6) can be sealed.

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