CN112704800A - Needle head of guide needle - Google Patents

Abstract

The invention relates to the technical field of medical equipment, and provides a guide needle head which comprises an inner side cutting edge plane, wherein an outer side cutting edge plane is arranged on one side of the inner side cutting edge plane, the inner side cutting edge plane is asymmetric to the outer side cutting edge plane, and the size of the outer side cutting edge plane is smaller than that of the inner side cutting edge plane; according to the invention, the needle point is designed into a gun point shape from the currently common triangular prism, and the cutting edge grinding lines are along the advancing direction of the needle, so that compared with the traditional triangular prism structure, the puncture resistance can be effectively reduced, the transverse cutting injury of the traditional needle head to tissues is eliminated, and the suture and healing of puncture holes are facilitated; the invention adds a group of grinding planes outside the needle point and an outside cutting edge, the grinding surface of the newly added outside cutting edge plane has a width narrower than that of the inside cutting edge plane and a length shorter than that of the inside cutting edge plane, so that the front end of the needle point is in a gun tip shape but is asymmetric, the whole length of the needle point is shortened, the needle point is not attached to the wall of a sheath, and the damage to the needle point in the storage and transportation process is basically eliminated.

Description

Needle head of guide needle

Technical Field

The invention relates to the technical field of medical equipment, in particular to a guide needle head.

Background

The drainage tube plays an important role in surgical operations, and in the drainage treatment process of the postoperative catheter, one end of the catheter is generally implanted into a human body, and the other end of the catheter is exposed out of the human body for drainage; the drainage tube needs to be threaded through a drainage guide needle, so the drainage guide needle is also an essential part in the surgical operation; the drainage guide needle consists of a needle handle and a needle head, wherein the needle head is the most important part of the guide needle and determines whether a catheter can be smoothly installed and whether a wound of a patient is easier to heal; the guiding needle head in the prior art mainly has the following defects:

the sharpness of the needle point is not easy to maintain: the needle point is generally protected by a hard soft plastic sleeve, the gun tip is tightly attached to the tube wall, the strength of the gun tip is limited due to material limitation, and the gun tip is damaged and dulled due to extrusion factors in storage and transportation, so that the puncture resistance is increased in use and more tissues of a patient are injured;

secondly, a needle point cutting edge adopting a transverse grinding process is poor in sharpness and large in puncture resistance;

different puncture operation modes all have different degrees and must operate the degree of difficulty and increase to patient's wound: doctors generally have two puncture operation tendencies of forward insertion and upward picking, when the doctors adopt the forward insertion, wounds formed on tissues are generally triangular (or T-shaped), the resistance of the wounds to the forward movement of a needle is very large, the injuries to the tissues (especially muscles) in the transverse direction are obvious, and the triangular (or T-shaped) wounds on the surface of the skin after the wounds penetrate out are very unfavorable for the suture and healing of the wounds after the drainage tube is withdrawn; when the doctor adopts and chooses to wear to the top, the wound that forms to the tissue is sharp basically, and the horizontal cutting injury to the tissue is less, and skin surface wound is the line type, does benefit to the suture and the healing in later stage, but because the sword of needle all is generally longer, when choosing to wear, often causes the tissue vertical cutting width too wide, can lead to skin department wound overlength to lead to the hourglass to cause puncture failure even.

In view of the above drawbacks, a new technical solution is needed to solve the above technical problems.

Disclosure of Invention

The invention provides a guide needle head, aiming at inventing a guide needle head which can effectively reduce puncture resistance and eliminate transverse cutting injury to tissues.

The utility model provides a guide needle syringe needle, includes inboard blade plane, one side on inboard blade plane is equipped with outside blade plane, inboard blade plane and outside blade plane asymmetry, the size on outside blade plane is less than the size on inboard blade plane.

The inner side cutting edge plane comprises a first inner side cutting edge plane and a second inner side cutting edge plane, a first outer side cutting edge plane is arranged on one side of the first inner side cutting edge plane, a second outer side cutting edge plane is arranged on one side of the first outer side cutting edge plane, a second inner side cutting edge plane is arranged on one side of the second outer side cutting edge plane, and a first inner side cutting edge plane is arranged on one side of the second inner side cutting edge plane.

The intersection line between the first inner side cutting edge plane and the second inner side cutting edge plane is an inner cutting edge, and the intersection line between the second outer side cutting edge plane is arranged on one side of the first outer side cutting edge plane and is an outer cutting edge.

The angle of the inner cutting edge and the angle of the outer cutting edge are within the working range of 20-80 degrees; the angle of the inner cutting edge is an included angle formed by a plane vertical to the inner cutting edge and an intersection line between the first inner side cutting edge plane and the second inner side cutting edge plane; the angle of the outer cutting edge is an included angle formed by a plane vertical to the outer cutting edge and an intersection line between the plane of the first outer cutting edge and the plane of the second outer cutting edge.

The intersection line between the inner side cutting edge plane and the outer side cutting edge plane is parallel to the axis of the needle head.

An included angle is formed between the intersection line of the inner side cutting edge plane and the outer side cutting edge plane and the axis of the needle head.

The degree of the included angle is +/-20 degrees.

And the inner side cutting edge plane and the outer side cutting edge plane are processed by grinding or milling.

The inner side cutting edge plane and the outer side cutting edge plane are cambered surfaces.

And a small plane is arranged between the inner side cutting edge plane and the outer side cutting edge plane.

The definition of the inner edge plane and the outer edge plane is that for the transition arc of the drainage guide needle, the inner edge plane is inside the transition arc, and the outer edge plane is outside the transition arc.

In conclusion, the invention provides a drainage guide needle, wherein the needle point is designed into a gun tip shape from the currently common triangular prism, and the cutting edge grinding lines are along the advancing direction of the needle; compared with the traditional triangular needle point and transverse grinding cutting edge, the invention adds a group of grinding planes on the outer side of the needle point and adds an outer cutting edge, the width of the newly added grinding surface of the outer cutting edge is narrower than the plane of the inner cutting edge, and the length of the newly added grinding surface of the outer cutting edge is shorter than the plane of the inner cutting edge, so that the front end of the needle point is in a gun tip shape but is asymmetric, the whole length of the needle point is shortened, the needle point is not attached to the wall of a sheath, and the damage to the needle point in the.

Drawings

FIG. 1 is a schematic view of the structure of angle one of the present invention;

FIG. 2 is a schematic structural view of the second angle of the present invention;

FIG. 3 is a schematic view of the structure of angle III of the present invention;

FIG. 4 is a schematic view of the structure of angle four of the present invention;

FIG. 5 is a schematic diagram of the construction of a transition arc of different dimensions according to the present invention;

1. needle head 2, needle handle 3, transition arc 4 and inner side cutting edge plane

5. Outer edge plane 6, needle point 7, operation part 8 and intersecting line

9. First inner edge plane 10, second inner edge plane 11, first outer edge plane

12. A second outside lip plane 13, an upper groove 14, a lower groove 15, a left groove

16. A facet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the installation methods and technical terms mentioned in the present invention are technical terms that are already clearly known in the technical field, and thus, the explanation thereof is not repeated. Moreover, the same reference numerals are used for the same components, which do not affect and should not constitute an exact understanding of the technical solutions for a person skilled in the art.

The first embodiment is as follows:

the invention provides a guide needle head, which comprises an inner side cutting edge plane 4, wherein one side of the inner side cutting edge plane 4 is provided with an outer side cutting edge plane 5, the inner side cutting edge plane 4 and the outer side cutting edge plane 5 are intersected at a needle point 6, the inner side cutting edge plane 4 and the outer side cutting edge plane 5 are asymmetric, namely, the inner side cutting edge plane and the outer side cutting edge plane are asymmetric about the central axis of the needle head 1, the size of the outer side cutting edge plane 5 is smaller than that of the inner side cutting edge plane 4, and the sizes are the width and the length; if the inner cutting edge plane 4 and the outer cutting edge plane 5 are completely symmetrical, the cutting edge plane for cutting is perpendicular to the plane of the puncture line, severe transverse cutting to tissues (particularly muscles) can be caused during puncture, and the plane of the cutting edge for cutting and the plane of the puncture line can be coplanar through asymmetrical arrangement, so that the problem of transverse cutting to the tissues does not exist; as a preferred scheme, by adjusting the plane grinding angle of the outer cutting edge plane 5, the intersection line 8 between the outer cutting edge plane 5 and the inner and outer cutting edge planes 4 can be parallel to the axis direction of the needle head, and can also form a certain included angle with the axis of the needle head, and the included angle is preferably plus or minus 20 degrees; preferably, when a certain included angle is formed, one end of the needle point of the intersecting line 8 inclines towards the inner side cutting edge plane 4; according to the invention, the outer edge plane 5 is additionally arranged, and the needle head 1 is designed to be in a gun tip shape, so that the puncture resistance can be effectively reduced; the cutting edge plane is coincided with the puncture curve plane, so that the transverse cutting injury of the traditional needle head 1 to tissues (particularly muscles) is eliminated, and the suture and healing of puncture holes are facilitated; the needle head structure of the invention shortens the length of the whole needle point, so that the position of the needle point 6 is not attached to the wall of the sheath tube any more, and the damage to the needle point 6 in the storage and transportation process is basically eliminated; the technology can adapt to two operation habits of inserting and penetrating electrodes and picking by doctors, obviously reduces the puncture resistance and reduces the cutting damage to tissues, does not generate triangular (or T-shaped) wounds and does not generate transverse cutting wound to human tissues (particularly muscles) during inserting and penetrating operation, has moderate cutting edge width and small puncture resistance, and does not generate the risk of tearing the tissues due to insufficient cutting edge width; during the pricking operation, the length of the inner side cutting edge plane 4 can be obviously shortened by increasing the outer side cutting edge plane 5 (namely, the length of the plane type cutting edge can be further increased and appropriately shortened at the rear end of the inner side cutting edge plane 4), so that the required width of the wound for pricking is met, the longitudinal tissue cutting length is obviously shortened, and the tissue injury is reduced; the cutting edge is changed into longitudinal grinding from transverse grinding, so that the sharpness of the cutting edge is obviously improved, the puncture resistance is reduced, the puncture difficulty is reduced, and the puncture success rate is improved.

Example two:

the present embodiment specifically defines the inner-side edge plane 4 and the outer-side edge plane 5, specifically, the inner-side edge plane 4 includes a first inner-side edge plane 9 and a second inner-side edge plane 10, a second inner-side edge plane 10 is disposed on one side of the first inner-side edge plane 9, a first outer-side edge plane 11 is disposed on the other side of the first inner-side edge plane 9, a second outer-side edge plane 12 is disposed on one side of the first outer-side edge plane 11, a second inner-side edge plane 10 is disposed on one side of the second outer-side edge plane 12, and a first inner-side edge plane 9 is disposed on one side of the second inner-side edge plane 10; the intersection line between the first inner side cutting edge plane 9 and the second inner side cutting edge plane 10, the intersection line between the first inner side cutting edge plane 9 and the first outer side cutting edge plane 11, the intersection line between the first outer side cutting edge plane 11 and the second outer side cutting edge plane 12, and the intersection line between the second outer side cutting edge plane 12 and the second inner side cutting edge plane 10 are intersected to form the needle point 6; during processing, the inner side cutting edge plane 4 and the outer side cutting edge plane 5 are ground and formed, the transverse grinding in the prior art is changed into longitudinal grinding, the sharpness of the cutting edges is obviously improved, the puncture resistance is reduced, the puncture difficulty is reduced, the puncture success rate is improved, the cutting edge grinding mode is changed from the transverse direction perpendicular to the axial direction of the needle into the longitudinal direction along the axial direction of the needle, and the grinding plane is preferably arc-shaped; the plane can also be manufactured by adopting different processing technologies, and technicians can select the plane according to specific conditions, so that the plane is not specifically limited; the inner edge plane 4 and the outer edge plane 5 in the present invention may also be milled.

The intersecting lines 8 between the first inner side cutting edge plane 9, the second inner side cutting edge plane 10, the first outer side cutting edge plane 11 and the second outer side cutting edge plane 12 are intersected to form the needle point 6, the needle point 6 is recycled inwards, the longitudinal scratching width of the needle point to tissues during operation of a doctor can be obviously reduced, and the damage to the tissues and the air leakage risk caused by too wide puncture hole are reduced.

The intersection line between the first inner side cutting edge plane 9 and the second inner side cutting edge plane 10 is an inner cutting edge, and the intersection line between the second outer side cutting edge planes 12 is arranged on one side of the first outer side cutting edge plane 11 and is an outer cutting edge; the angle of the inner cutting edge and the angle of the outer cutting edge are 20-80 degrees; the angle of the inner cutting edge is an included angle formed by a plane vertical to the inner cutting edge and an intersection line between the first inner side cutting edge plane 9 and the second inner side cutting edge plane 10; the angle of the outer cutting edge is an included angle formed by a plane vertical to the outer cutting edge and an intersection line between the first outer cutting edge plane 11 and the second outer cutting edge plane 12;

the angle of the outer cutting edge and the angle of the inner cutting edge are more convenient to thread, so that the puncture resistance is effectively reduced, the transverse cutting injury of the traditional needle head to tissues (particularly muscles) is eliminated, and the suture and healing of puncture holes are facilitated.

Example three:

in the embodiment, a small plane 16 is arranged at the intersection line 8 between the inner cutting edge 4 and the outer cutting edge 5; more specifically, a facet 16 is arranged at each of the intersections 8 between the first inner cutting edge 9 and the first outer cutting edge 11 and between the second inner cutting edge 10 and the second outer cutting edge 12; further reducing the length of the cutting edge and further reducing the width of the tissue to be longitudinally cut during operation.

Example four:

in the embodiment, the needle head 1 is connected with the needle handle 2 through the transition arc 3, the radius of the transition arc 3 is not specifically limited, a technician specifically selects according to specific conditions, and the needle head 1 is provided with an operation part 7; namely, the operating part 7 is arranged at the back of the needle point 5, the operation of a doctor is facilitated by the arrangement of the operating part 7, the doctor can overcome the stick slip caused by tissue fluid adhered to a glove after the needle penetrates out of the skin, the needle is pulled out of the tissue, and the operation is facilitated.

The inner cutting edge 4 and the outer cutting edge 5 are defined, and the area formed by bending the needle head 1 relative to the needle handle 2 and less than 180 degrees is the inner side.

Example five:

in the embodiment, in order to further facilitate the operation of the doctor, the needle handle 2 is provided with an operation part 7; the needle is prevented from being overturned by holding the direction when the puncture is facilitated, and is pushed forwards, the success rate of one-time puncture is improved, and the tissue injury to a patient is reduced.

Specifically, the operating portion 7 is a recess; the grooves are in the shape of flat mouths, preferably the grooves comprise an upper groove 13 and/or a lower groove 14, and the grooves also comprise a left groove 15 and/or a right groove; that is, the groove can be any one or combination of more of the upper groove 13, the lower groove 14, the left groove 15 and the right groove, the invention is not specifically limited herein, and the arrangement of the grooves is convenient for the doctor to operate; the arrangement of the groove at the part 1 of the needle head is beneficial for a doctor to overcome the stick slip caused by the adhesion of the glove to the tissue fluid after the needle penetrates out of the skin, and the needle is pulled out of the tissue; the groove on the needle handle 2 is beneficial to holding the direction to prevent the needle from turning over and pushing forwards during puncture, thereby improving the success rate of puncture once and reducing the tissue damage to a patient; the grooves in the invention are extruded preferentially, and cold extrusion technology is adopted to replace the turning and milling technology which is commonly adopted at present, so that the processing efficiency is greatly improved, and the processing cost is obviously reduced; the invention adopts the extrusion process to achieve the mechanism with the same function; the extrusion process is to use a manufactured die, place a product to be processed into a positioning groove, and then close the die and pressurize to enable the material to generate expected plastic deformation to finish the processing; the extrusion process in the invention can be assisted without a die, and when the extrusion process is not assisted, the processing of the groove can cause the two sides to extend outwards to generate certain deformation, which is also within the protection scope of the invention; the machining process is quick, the consistency is good, the material is not reduced, the precision is slightly poorer than that of a turning and milling process, but the purpose of the technology is enough, and the requirement of the function of the groove is completely met; compared with turning and milling, the extrusion process has the characteristics of high efficiency and low cost, is applied to the processing of the guide needle groove, is obviously beneficial to reducing the process cost, and is further beneficial to patients in the future.

The simple modification that the needle 1 is provided with the operation part 7 and the needle handle 2 is provided with the operation part 7 to communicate with each other is also within the protection scope of the present invention.

In conclusion, the invention provides the guide needle head, the needle point is designed into the shape of a gun point from the currently common triangular prism, and the cutting edge grinding lines are along the advancing direction of the needle, so that the structure of the gun point-shaped needle point can effectively reduce the puncture resistance compared with the traditional triangular prism, eliminate the transverse cutting injury of the traditional needle head to tissues (particularly muscles), and is beneficial to the suture and healing of puncture holes; the arrangement of the invention shortens the whole length of the needle point, the needle point position is not attached to the wall of the sheath tube, the damage to the needle point in the storage and transportation process is basically eliminated, and the length of the cutting edge of the needle point is shortened, thus being beneficial to reducing the length of the longitudinal incision of the tissue; compared with the traditional triangular-prism-shaped needle point and transverse grinding cutting edge, the invention adds a group of grinding planes outside the needle point and adds an outer cutting edge, the width of the newly added outer cutting edge plane is narrower than that of the inner cutting edge plane, and the length of the newly added outer cutting edge plane is shorter than that of the inner cutting edge plane, so that the front end of the needle point is in a gun tip shape but is asymmetric; the plane formed by the inner and outer cutting edges is coplanar with the plane of the puncture curve (i.e. the plane formed by the central axis of the needle), thus reducing the harm to the patient.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any minor modifications, equivalent replacements and improvements made to the above embodiment according to the technical spirit of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims (7)

1. The utility model provides a guide needle syringe needle, includes inboard blade plane (4), its characterized in that, one side of inboard blade plane (4) is equipped with outside blade plane (5), inboard blade plane (4) and outside blade plane (5) asymmetry, the size of outside blade plane (5) is less than the size of inboard blade plane (4).

2. The introducer needle tip of claim 1, wherein the inner edge plane (4) comprises a first inner edge plane (9) and a second inner edge plane (10), wherein a first outer edge plane (11) is disposed on one side of the first inner edge plane (9), a second outer edge plane (12) is disposed on one side of the first outer edge plane (11), a second inner edge plane (10) is disposed on one side of the second outer edge plane (12), and a first inner edge plane (9) is disposed on one side of the second inner edge plane (10).

3. The introducer needle head as set forth in claim 2, wherein the intersection between the first inner edge plane (9) and the second inner edge plane (10) is an inner edge, and the intersection between the second outer edge plane (12) is an outer edge provided at one side of the first outer edge plane (11).

4. An introducer needle tip as claimed in claim 3, wherein the angle of the inner edge and the angle of the outer edge are in the range of 20 ° to 80 °.

5. The introducer needle tip as set forth in claim 1, characterized in that the inner and outer edge planes (4, 5) are ground or milled.

6. The introducer needle tip as set forth in claim 1, wherein the inner cutting edge plane (4) and the outer cutting edge (5) plane are curved surfaces.

7. The introducer needle tip as claimed in any one of claims 1 to 6, wherein a facet (16) is provided between the inner and outer cutting planes (4, 5).

Images