CN211270873U

CN211270873U - Negative pressure suction positive soft tissue rotary cutting sampling needle

Info

Publication number: CN211270873U
Application number: CN201922224852.XU
Authority: CN
Inventors: 李献亮; 孙军
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-08-18
Anticipated expiration: 2029-12-12

Abstract

The utility model discloses a negative pressure attracts positive soft tissue rotary-cut sampling needle, belong to medical instrument technical field, the sampling needle includes outer needle tubing and rotary-cut part, still include the nook closing member, the rotary-cut part includes interior needle tubing and cutting piece, contained angle between cutting piece and the interior needle tubing axis equals the contained angle alpha between the oblique spigot surface of nook closing member and its axis, the nook closing member, interior needle tubing, outer needle tubing sets gradually from inside to outside and the medial surface of cutting piece forms into piercing depth with the oblique spigot surface in close contact with of nook closing member front end, interior needle tubing pegs graft with outer needle tubing and interior needle tubing has the rotatory degree of freedom to form into rotary-cut sampling depth. The length of the cut soft tissue can be flexibly adjusted, the safety of the normal soft tissue can be better guaranteed, the safety requirement of general parenchymal organ puncture can be met, the purposes of taking out necrotic tissues after ablation, cutting off benign tumors and carrying out tissue biopsy can be realized, and the clinical treatment effect is obviously improved.

Description

Negative pressure suction positive soft tissue rotary cutting sampling needle

Technical Field

The utility model belongs to the technical field of medical instrument, a sampling needle is related to, especially a negative pressure attracts positive soft tissue rotary-cut sampling needle.

Background

The central area after tumor ablation is not easy to be accepted by patients because of incomplete carbonization and absorption, and large tumors have a large amount of ablated necrotic tissues, and the sampling needle is needed for taking out the ablated necrotic tissues, excising benign tumors, carrying out tissue biopsy and the like. The existing sampling needles are lateral rotary cutting needles represented by the Maimengtong, the cutting length is inflexible, the operation wound is large, excessive normal tissues are often cut, and the existing sampling needles cannot be regarded as real minimal invasion. In addition, the needle diameter is thick, which leads to an increased risk of bleeding.

Disclosure of Invention

The utility model discloses an overcome prior art's defect, designed a negative pressure and attracted positive soft tissue rotary-cut sampling needle, can adjust in a flexible way by the length of cutting the soft tissue, the safety of the normal soft tissue of at utmost guarantee accomplishes real wicresoft. The diameter of the sampling needle is relatively thin, so that the safety requirement of general parenchymal organ puncture can be met, simultaneously the purposes of taking out necrotic tissues after ablation, excising benign tumors and carrying out tissue biopsy can be realized, and the clinical treatment effect is obviously improved.

The utility model adopts the following specific technical proposal: the utility model provides a negative pressure attracts positive soft tissue rotary-cut sampling needle, includes outer needle tubing and cartridge at the inside rotary-cut part of outer needle tubing, and the key lies in: the sampling needle further comprises a needle core, the front end face of the needle core is an oblique insertion face, the rotary cutting component comprises an inner needle tube and a cutting piece arranged on the front end face of the inner needle tube, the front end of the cutting piece inclines towards the inner side of the inner needle tube, an included angle between the cutting piece and the axis of the inner needle tube is equal to an included angle alpha between the oblique insertion face of the needle core and the axis of the needle core, the inner needle tube and the outer needle tube are sequentially arranged from inside to outside, the inner side face of the cutting piece is in close contact with the oblique insertion face at the front end of the needle core to form a puncture mechanism, the inner needle tube is spliced with the outer needle tube, and the inner needle tube has.

The included angle alpha is 40-60 degrees.

The included angle alpha is 45 degrees.

The length L1 of the cutting blade along the axial direction of the inner needle tube is less than or equal to the length of the inclined insertion surface at the front end of the stylet along the axial direction.

The front end surface of the outer needle tube is a plane which is vertical to the axis of the outer needle tube.

The cutting edge of the cutting blade is a beveled cutting edge.

The rear end of the inner needle tube is provided with a quick assembly disassembly connecting piece which is used for being connected with the negative pressure suction device, and the quick assembly disassembly connecting piece and the inner needle tube form rotating fit.

The utility model has the advantages that: the needle core, the inner needle tube and the outer needle tube are sequentially inserted from inside to outside, so that the cutting blade protrudes in front of the outer needle tube, the inner side surface of the cutting blade is in close contact with the inclined insertion surface of the needle core, then puncture is carried out, and the needle core is arranged to prevent foreign matters from entering the inner needle tube in the puncture process. After the cutting blade reaches the front edge of the target soft tissue, the needle core is pulled out, the rear end of the inner needle tube is connected with the negative pressure suction device, then the negative pressure is started, the soft tissue enters the inner needle tube, the inner needle tube is pushed and rotated, the target soft tissue in the inner needle tube is separated from the soft tissue outside the inner needle tube by the cutting blade at the front end of the inner needle tube, and the cut and separated target soft tissue is discharged from the inner needle tube under the negative pressure suction effect of the negative pressure suction device and reaches the specimen collection box positioned behind the inner needle tube. The utility model discloses a sampling needle can be adjusted in a flexible way by the length of cutting the soft tissue, and the safety of the normal soft tissue of furthest's guarantee accomplishes real wicresoft.

The utility model discloses a sampling needle has following advantage: firstly, because the full-groove cutting is adopted, the sampling needle can cut more soft tissues in a single time under the condition of the same diameter; the cutting edge of the cutting blade is an oblique cutting edge, so that the resistance in cutting can be reduced, and the safety of the sampling needle is guaranteed; the tip of the outer needle tube is ground to form a ground layer, so that the ultrasonic reflection intensity can be improved, the display of an ultrasonic image is facilitated, and the safety of the operation is ensured; the rear end of the inner needle tube is connected with a negative pressure suction device, so that soft tissues can conveniently enter the inner needle tube, and cut target soft tissues can conveniently and smoothly reach a specimen collection box behind the inner needle tube; fifth, the true conformal cutting can be achieved by longitudinal cutting, and the true minimally invasive is achieved; the diameter of the sampling needle (namely the outer diameter of the outer needle tube) is relatively thin, so that the safety requirement of general parenchymal organ puncture can be met, the purposes of taking out necrotic tissues after ablation, excising benign tumors and carrying out tissue biopsy can be realized, and the clinical treatment effect is obviously improved.

Drawings

Fig. 1 is a schematic structural view of the present invention during puncturing.

Fig. 2 is a schematic structural view of the rotary cutting sampling device of the present invention.

Fig. 3 is a front view of the needle core of the present invention.

Fig. 4 is a top view of the needle core of the present invention.

In the attached drawings, 1 represents an outer needle tube, 2 represents an inner needle tube, 3 represents a cutting blade, 4 represents a needle core, and 5 represents a quick-release connector.

Detailed Description

The present invention will be described in detail with reference to the following drawings and specific embodiments:

in a specific embodiment, as shown in fig. 1 to 4, a negative pressure suction positive soft tissue rotary-cut sampling needle comprises an outer needle tube 1 and a rotary-cut component inserted in the outer needle tube 1, the sampling needle further comprises a needle core 4, the front end surface of the needle core 4 is an oblique insertion surface, as shown in fig. 3 and 4, the rotary-cut component comprises an inner needle tube 2 and a cutting blade 3 arranged on the front end surface of the inner needle tube 2, the front end of the cutting blade 3 is inclined towards the inner side of the inner needle tube 2, the included angle between the cutting blade 3 and the axis of the inner needle tube 1 is equal to the included angle α between the oblique insertion surface of the needle core 4 and the axis thereof, the needle core 4, the inner needle tube 2 and the outer needle tube 1 are sequentially arranged from inside to outside, the inner side surface of the cutting blade 3 is in close contact with the oblique insertion surface at the front end of the needle core 4 to form a puncturing mechanism, the inner needle tube 2 is inserted in the outer needle tube 1.

As a further improvement of the present invention, the angle α is 40-60 ° and preferably 45 ° in order to enable the cutting blade 3 to cut more soft tissue at a single time.

As a further improvement, the length L1 of the cutting blade 3 along the axial direction of the inner needle tube 2 is less than or equal to the length of the inclined insertion surface at the front end of the needle core 4 along the axial direction. During puncturing, the needle core 4 can effectively play a role in supporting the cutting blade 3, so that puncturing can be smoothly completed.

As a further improvement of the utility model, the front end surface of the outer needle tube 1 is a plane which is vertical to the axis thereof, and the length of the invalid needle point can be shortened.

As right the utility model discloses a further improvement, the cutting edge of cutting piece 3 is the oblique cutting edge, resistance when can reducing the cutting, and is more laborsaving during the cutting, and is fast, guarantee sample needle's security, and the cutting effect is better.

As right the utility model discloses a further improvement is provided with the quick assembly disassembly connecting piece 5 that is used for being connected with negative pressure suction device at interior needle tubing 2 rear end, and quick assembly disassembly connecting piece 5 forms normal running fit with interior needle tubing 2. The connecting piece 5 can be quickly and conveniently disassembled to ensure that the negative pressure suction device and the inner needle tube 2 are simpler to connect or separate. The quick assembly disassembly connecting piece 5 can be a sleeve, one end of the sleeve is in running fit with the inner needle tube 2, an inner thread is arranged on the inner wall of the other end of the sleeve, an outer thread is arranged at one end of the negative pressure suction device connected with the inner needle tube 2, and the sleeve is in threaded connection with the negative pressure suction device. The quick-assembly and disassembly connecting piece 5 can also be an elastic snap ring, one end of the elastic snap ring forms a running fit with the inner needle tube 2, and the other end of the elastic snap ring is sleeved on the negative pressure suction device and is clamped and fixed with the negative pressure suction device.

The utility model discloses when specifically using, at first peg graft in proper order nook closing member 4, interior needle tubing 2, outer needle tubing 1 from inside to outside, make cutting piece 3 protrusion in outer needle tubing 1 the place ahead and make cutting piece 3's medial surface and nook closing member 4's oblique plug surface in close contact with, as shown in figure 1, then puncture, setting up of nook closing member 4 can prevent that the puncture in-process from having the foreign matter to enter into in the needle tubing 2. After the cutting blade 3 reaches the front edge of the target soft tissue, the needle core 4 is pulled out, as shown in figure 2, the rear end of the inner needle tube 2 is connected with a negative pressure suction device, then the negative pressure is started to enable the soft tissue to enter the inner needle tube 2, the inner needle tube 2 is pushed and rotated, the target soft tissue in the inner needle tube is separated from the soft tissue outside the inner needle tube 2 by the cutting blade 3 at the front end of the inner needle tube 2, and the cut and separated target soft tissue is discharged from the inner needle tube 2 under the negative pressure suction effect of the negative pressure suction device and reaches a specimen collection box positioned behind the inner needle tube 2.

The utility model discloses a sampling needle can be adjusted in a flexible way by the length of cutting the soft tissue, and the safety of the normal soft tissue of furthest's guarantee accomplishes real wicresoft. The utility model discloses 1 internal diameter of outer needle tubing of sample needle is 2.2-4mm, the wall thickness less than or equal to 1mm of outer needle tubing, and the needling instrument diameter (outer needle tubing external diameter promptly) is thin compared with current needling instrument, both can satisfy the security requirement of general parenchyma internal organs puncture, can realize melting back necrotic tissue's the purpose of taking out, excision of benign tumour, tissue biopsy simultaneously, obviously improve clinical treatment, satisfy the cutting requirement of higher risk position soft tissue under the prerequisite of guaranteeing safety.

Claims

1. The utility model provides a positive soft tissue rotary-cut sampling needle of negative pressure suction, includes outer needle tubing (1) and cartridge at the inside rotary-cut part of outer needle tubing (1), its characterized in that: the sampling needle further comprises a needle core (4), the front end face of the needle core (4) is an oblique insertion face, the rotary-cut component comprises an inner needle tube (2) and a cutting sheet (3) arranged on the front end face of the inner needle tube (2), the front end of the cutting sheet (3) inclines towards the inner side of the inner needle tube (2) and the included angle between the cutting sheet (3) and the axis of the inner needle tube is equal to the included angle alpha between the oblique insertion face of the needle core (4) and the axis of the inner needle tube, the needle core (4), the inner needle tube (2) and the outer needle tube (1) are sequentially arranged from inside to outside, the inner side face of the cutting sheet (3) and the oblique insertion face of the front end of the needle core (4) are in close contact to form a puncture mechanism, the inner needle tube (2) is spliced with the outer needle tube (1), and the inner needle tube (2.

2. The negative pressure suction positive soft tissue rotary-cut sampling needle according to claim 1, characterized in that: the included angle alpha is 40-60 degrees.

3. The negative pressure suction positive soft tissue rotary-cut sampling needle according to claim 2, characterized in that: the included angle alpha is 45 degrees.

4. The negative pressure suction positive soft tissue rotary-cut sampling needle according to claim 1, characterized in that: the length L1 of the cutting blade (3) along the axial direction of the inner needle tube (2) is less than or equal to the length of the inclined insertion surface at the front end of the needle core (4) along the axial direction.

5. The negative pressure suction positive soft tissue rotary-cut sampling needle according to claim 1, characterized in that: the front end surface of the outer needle tube (1) is a plane which is vertical to the axis of the outer needle tube.

6. The negative pressure suction positive soft tissue rotary-cut sampling needle according to claim 1, characterized in that: the cutting edge of the cutting blade (3) is a bevel cutting edge.

7. The negative pressure suction positive soft tissue rotary-cut sampling needle according to claim 1, characterized in that: the rear end of the inner needle tube (2) is provided with a quick assembly disassembly connecting piece (5) which is used for being connected with the negative pressure suction device, and the quick assembly disassembly connecting piece (5) and the inner needle tube (2) form rotating fit.