CN111436978A - Disposable tissue aspiration biopsy needle - Google Patents

Abstract

The invention discloses a disposable tissue aspiration biopsy needle, which belongs to the field of medical diagnosis related instruments and comprises a cylindrical outer needle, wherein an outer needle point is arranged on the outer needle in the length direction of the outer needle; preferably, an arc-shaped blade is arranged at the notch part, and the blade is connected with the outer needle cylinder by adopting a connecting rod; according to the invention, the calcium oxalate bionic coating is coated on the outer needle point part, so that the accurate position of the puncture needle entering the body can be clearly displayed, the puncture success rate is improved, the damage is reduced, and the calcium oxalate bionic material has good biocompatibility and can not cause additional damage; the arc-shaped blade is arranged, so that two tissues can be obtained by puncturing once, the puncturing efficiency is improved, and the bleeding risk is further reduced; the invention can be used for puncturing various tissues and has wide applicability.

Description

Disposable tissue aspiration biopsy needle

Technical Field

The invention relates to the field of medical diagnosis related instruments, in particular to a disposable tissue aspiration biopsy needle.

Background

Pathological examination by tissue biopsy is the most common means for diagnosing a variety of organ diseases.

Taking kidney biopsy as an example, renal biopsy is the gold standard for diagnosis of various kidney diseases. In recent years, with the recognition of diseases, the proportion of patients for needle biopsy has increased year by year. Most nephrology departments adopt a color ultrasound guide lower fixer to fix a disposable puncture needle for carrying out tissue aspiration biopsy.

The prior common tissue aspiration biopsy needle has the following problems in the use process:

1. because the naked eye is difficult to accurately position whether the needle point of the puncture needle reaches the renal capsule under the ultrasonic guiding condition, the position of the needle point is judged only by observing whether the kidney is pressed by the naked eye at present, so that the puncture position is too deep frequently, the punctured renal tissue mainly comprises renal medulla, glomeruli cannot reach the required number, or the puncture position is too shallow, the obtained renal tissue is insufficient, repeated puncture is needed, and the injury of a patient and the bleeding risk after puncture are increased;

namely, the puncture needle used at present can not be accurately positioned to enter the position in the body under the color Doppler ultrasound and needs to be punctured for many times;

2. the lesion focal segments of part of kidney diseases are distributed, more glomeruli are needed to improve the diagnosis accuracy, renal puncture is often needed to be repeated for 2-3 times to obtain more glomeruli, and the repeated puncture increases the bleeding risk and the psychological burden of patients;

that is, the current puncture needle can not meet the diagnosis requirement by one sampling amount, and needs to puncture for many times.

Disclosure of Invention

The invention aims to provide a disposable tissue aspiration biopsy needle to solve the problems that the needle cannot be accurately positioned to enter the position in a body under color ultrasonography and needs to be punctured for multiple times.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a disposable tissue aspiration biopsy needle, includes the outer needle of tube-shape, outer needle is provided with outer needle point at its length direction, outer needle endotheca is equipped with the interior needle of column, be provided with slot and notch portion on the interior needle to needle point in the end is provided with outer needle point coating has the bionic coating of calcium oxalate.

Calcium oxalate is a compound which presents a strong echogenic cluster under color ultrasonography, and renal calculus formed by calcium oxalate usually has obvious difference with renal tissues and can be obviously presented under color ultrasonography, so that the invention uses the existing calcium oxalate bionic material (commercially available) to be coated on the needle point part of the puncture needle, namely, the arrival position of the puncture needle can be clearly displayed under color ultrasonography, and the puncture accuracy is improved.

As a preferred technical scheme: the utility model provides a battery pole piece, including notch portion, connecting rod, the notch portion department is provided with the arc blade, the blade inboard sets up inside cavity, the length of blade is shorter than the notch portion, keeping away from of blade the one end of interior needle point links to each other with a slice connecting rod, the other end of connecting rod is fixed in interior needle, the connecting rod is the metal sheet that can kick-back, for example can be the metal that can kick-back that common battery pole piece adopted, and this type of metal takes place the position change under the exogenic action, kick-backs to original position rapidly after.

Through above-mentioned structure, further solve the not enough problem that can not satisfy the diagnosis requirement of traditional sample volume, need puncture many times.

When blade initial installation to pjncture needle in, because the connecting rod adopts the sheetmetal that has good resilience ability, carry out 180 degrees rotations in its one end during initial installation, interior needle point pierces out the back, and outer needle inner wall disappears to the pressure of connecting rod, and the connecting rod relies on inertia to rotate back 180 degrees under its self good resilience, drives the blade simultaneously and rotates 180 degrees, cuts the tissue (for example kidney tissue) above the notch portion.

And a new blade is adopted, so that one tissue can be obtained again.

The puncture needle can accurately position the arrival position of the needle point, and can puncture to obtain two tissues at one time, so that the puncture efficiency is improved, and the bleeding risk is reduced.

As a preferred technical scheme: the two sides of the blade are sharp. Such a shape is more conducive to cutting tissue.

As a preferred technical scheme: the blade is in a semicircular arc shape. The semi-arc blade is adopted, so that the requirement of tissue sampling quantity is met, insufficient sampling can be caused if the arc is too small, smooth proceeding of the cutting process is met, and the cutting is possibly blocked due to the fact that the arc is too large.

As a preferred technical scheme: the connecting rod is a spring steel sheet. The spring steel sheet can better meet the requirement of rapid rebound.

Compared with the prior art, the invention has the advantages that:

1. the puncture needle used at present can not be accurately positioned and enter the position in the body under color Doppler ultrasound, and the accurate position of the puncture needle entering the body can be clearly displayed by coating the bionic calcium oxalate coating on the outer needle point part, so that the puncture success rate is improved, and the damage is reduced;

2. the calcium oxalate bionic material has good biocompatibility and can not cause additional damage;

3. the puncture needle point emits and simultaneously emits the arc-shaped blade, the kidney tissue beside the puncture needle is cut by rotating 180 degrees beside the puncture needle, then the kidney tissue is covered above the puncture needle groove and returns to the cylindrical outer needle together with the puncture needle, the puncture needle point punctures one kidney tissue, and the puncture needle can puncture one kidney tissue and simultaneously obtain two tissues, so that repeated puncture is avoided, the kidney puncture efficiency is improved, and the bleeding risk is reduced;

4. the puncture needle can be used for various tissue puncture biopsy needles, including kidney puncture, liver puncture and the like, and has wide applicability.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the initial installation of the blade;

fig. 3 is a schematic structural view of the blade after the connecting rod rebounds.

In the figure: 1. an outer needle; 2. an outer needle tip; 3. an inner needle; 4. a groove; 5. a notch part; 6. an inner needle tip; 7. calcium oxalate bionic coating; 8. a blade; 9. a connecting rod.

Detailed Description

The invention will be further explained with reference to the drawings; it should be understood that the following examples are only preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Example 1:

referring to fig. 1, a disposable tissue biopsy needle comprises a cylindrical outer needle 1, wherein an outer needle point 2 is arranged on the outer needle 1 in the length direction, a cylindrical inner needle 3 is sleeved in the outer needle 1, a groove 4 and a notch part 5 are arranged on the inner needle 3, an inner needle point 6 is arranged at the tail end of the inner needle 3, and a calcium oxalate bionic coating 7 is coated on the outer needle point 2; the basic structure is disclosed in the specification of Chinese patent application No. 201680020476.9 and the attached figure 1;

the improvement point of the embodiment is that the needle point 2 is coated with a calcium oxalate bionic coating 7. The calcium oxalate biomimetic coating 7 is commercially available, and can also be prepared by the existing method, such as biomimetic synthesis of calcium oxalate under the action of a polymer substrate.

Example 2:

referring to fig. 1 and 2, a disposable tissue aspiration biopsy needle comprises a cylindrical outer needle 1, wherein an outer needle point 2 is arranged on the outer needle 1 in the length direction, a cylindrical inner needle 3 is sleeved in the outer needle 1, a groove 4 and a notch part 5 are arranged on the inner needle 3, an inner needle point 6 is arranged at the tail end of the inner needle 3, and a calcium oxalate bionic coating 7 is coated on the outer needle point 2; the basic structure is disclosed in the specification of Chinese patent application No. 201680020476.9 and the attached figure 1;

the improvement point of the embodiment is that the needle point 2 is coated with a calcium oxalate bionic coating 7; the calcium oxalate bionic coating 7 is commercially available, and can also be prepared by the existing method, such as 'bionic synthesis of calcium oxalate under the action of a high molecular substrate';

moreover, a semi-cylindrical blade 8 is arranged at the notch part 5, an inner cavity is arranged at the inner side of the blade 8 (namely, the blade 8 can be regarded as a hollow cylinder which is divided into a half shape along the central axis, namely, the shape is the shape in the embodiment, as shown in fig. 1; of course, the hollow cylinder can be cut unevenly along the axial direction, namely, a small half, the length of the blade 8 is slightly shorter than that of the notch part 5, one end of the blade 8, which is far away from the inner needle point 6, is connected with a sheet-shaped connecting rod 9, the other end of the connecting rod 9 is fixed on the inner needle 3, and the connecting rod 9 is in a rectangular iron sheet shape; both sides of the blade 8 are sharp, which is convenient for cutting various tissues such as kidney tissues;

the installation and use principle is as follows: when the blade 8 is arranged in the cylindrical outer needle 1, the connecting rod 9 rotates 180 degrees (at this time, the concave surface of the semi-cylindrical (or arc) puncture blade 8 faces outwards, namely, the notch part 4 of the back inner needle 3, fig. 1 is the state of initial installation, the initial state is that the connecting rod 9 rotates 180 degrees and is pressed by the external force of the cylindrical outer needle 1, the rotating state is kept, the concave surface of the blade 8 faces outwards in the rotating state, the fixing is carried out by the pressure of the inner wall of the cylindrical outer needle 1, so that the groove of the semi-circular blade faces outwards, namely, the back puncture needle faces towards the tissue to be punctured, such as kidney tissue, when the puncture needle controlled by a transmitting gun is transmitted, the inner needle point 6 is transmitted forwards, the connecting rod 9 fixed on the puncture needle and the semi-cylindrical blade 8 are transmitted forwards together, the connecting rod 9 loses the pressure of the cylindrical outer needle tube, under the inertia condition, the connecting rod 9 rotates 180 degrees, and, after cutting the kidney tissue beside the puncture needle, the kidney tissue covers the upper part of the back groove opening part 5 and returns to the cylindrical outer needle 1 together with the inner needle point 6 of the puncture needle to finish the puncture.

Taking renal puncture as an example, the process of puncturing by using the puncture needle of the invention is as follows:

(1) the patient is in a prone position, the approximate puncture depth and the needle inserting position are determined under color ultrasonography, after the towel is spread through conventional disinfection, the puncture needle is positioned again, the puncture needle is fixed by a fixing frame, and the skin is broken and the needle is inserted to the measurement depth plus 1-2cm above the height of the fixing frame;

(2) advising the patient to hold the breath, continuing to insert the needle about 1cm after the puncture needle reaches the kidney capsule under the color Doppler ultrasound, pressing the puncture gun to launch the puncture needle, then rapidly removing the puncture needle to see the kidney tissue, wherein the length is 10-15mm, and glomeruli (red dots under the light) densely distributed on the puncture needle are qualified samples;

(3) keeping the sample and sending to a light examination mirror and an electron microscope;

(4) observing whether the patient has perirenal hematoma, disinfecting, covering dressing, transferring the patient, and monitoring the vital signs of the patient.

Claims (5)

1. The utility model provides a disposable tissue aspiration biopsy needle, includes outer needle (1) of tube-shape, outer needle (1) is provided with outer needle point (2) at its length direction, outer needle (1) endotheca is equipped with column inner needle (3), be provided with slot (4) and notch portion (5) on inner needle (3) to needle point (6), its characterized in that in the end is provided with: the outer needle point (2) is coated with a calcium oxalate bionic coating (7).

2. The disposable tissue biopsy needle according to claim 1, wherein: be provided with arc blade (8) notch part (5) department, blade (8) inboard sets up inside cavity, the length weak point in notch part (4) of blade (8), keeping away from of blade (8) the one end of interior needle point (6) links to each other with a slice shape connecting rod (9), the other end of connecting rod (9) is fixed in interior needle (3), connecting rod (9) are the sheetmetal that can kick-back.

3. The disposable tissue biopsy needle according to claim 2, wherein: the two sides of the blade (8) are sharp.

4. The disposable tissue biopsy needle according to claim 2, wherein: the blade (8) is in a semicircular arc shape.

5. The disposable tissue biopsy needle according to claim 2, wherein: the connecting rod (9) is a spring steel sheet.

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