Medical needleTechnical Field
The invention relates to the field of instruments, in particular to a medical needle.
Background
In the prior art, chinese patent No. cn201310398855.X discloses a medical surgical needle, the handle of surgical needle is connected with the needle body of being made by stainless steel material, and the tip of needle body is equipped with the syringe needle, is equipped with the pinhole on the syringe needle, and the inside of handle is hollow structure, and the both ends of handle are the trompil, and the inside of needle body is hollow structure and communicates with the handle, and the hollow structure and the pinhole intercommunication of needle body inside, so surgical suture passes through the inside of needle body and handle, wears out the pinhole, realizes surgical suture. Because the middle position of the needle body is provided with the bending part, the visual effect of the needle body is good through the bending part, and the use is more convenient during operation.
However, in some cases, such as when a blood vessel in tissue is occluded by a surgical wire, the surgical needle passes through the tissue to the vicinity of the blood vessel; because the existing surgical needle is linear, the needle head can only move forward continuously after reaching the vicinity of the blood vessel, and the front vascular distribution is unknown, so that the risk and difficulty of the surgery are increased. The medical surgical needle is provided with the bending part at the middle position of the needle body, and the direction of the needle hole is parallel to the needle body, so that the medical surgical needle cannot be used for blocking blood vessels in the tissues.
For this reason, a new instrument is urgent to solve the above problems.
Disclosure of Invention
The invention aims at: aiming at the problems that when blocking blood vessels in tissues, the existing needle head can only continue to advance after reaching the vicinity of the blood vessels, and the distribution condition of the blood vessels in front is unknown, the risk and difficulty of operation are increased, the medical needle is provided to solve the problem. The application carries out brand-new improvement to current medical needle structure, proposes flexible crooked needle body structure for the first time, through adopting flexible crooked bight structural design, has realized flexible needle body movement track's adjustment, and then can realize effectively blocking or ligature corresponding organ or tissue under the prerequisite that breaks the tissue as far as possible to effectively reduce the uncertainty and the degree of difficulty of operation in the needle body puncture process. The application has better application effect on effectively blocking or ligating corresponding organs or tissues, is beneficial to the performance of related operations, and has extremely high application value and extremely good application prospect.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the medical needle comprises a linear needle tube and a flexible needle body, wherein the tail end of the linear needle tube is provided with a bendable bending part, a cavity is arranged in the bending part, and the cavity in the bending part is communicated with the inner cavity of the linear needle tube and forms a puncture cavity for the movement of the flexible needle body;
the flexible needle body is arranged in the puncture cavity and can deform according to the bending degree of the bending part when the bending part is bent.
The linear needle tube is circular or C-shaped along the section perpendicular to the central line of the linear needle tube;
or the linear needle tube is U-shaped along the section perpendicular to the central line of the linear needle tube, and the tail ends of the U-shape are respectively provided with a flange.
The linear needle tube is a rigid needle tube.
When the extending end of the bending part extends completely, an included angle formed by a straight line where the extending end port of the bending part is located and a straight line where the center line of the bending part is located is 0-90 degrees.
The bending part adopts a flexible needle tube, and the extending end of the bending part is arc-shaped; when the whole bending part is positioned in the linear needle tube, the shape of the bending part is restrained by the linear needle tube; when the bending part stretches out relative to the linear needle tube, the stretching end of the bending part is arc-shaped, and the flexible needle body can move in the bending part in an arc shape.
The bending part comprises a bending assembly and a driving piece for driving the bending assembly to move, and the bending assembly comprises a head end hollow pipe body movably connected with the linear needle tube and a tail end hollow pipe body connected with the head end;
the connecting protrusions are arranged on the hollow pipe body at the front end part in parallel, the connecting protrusions are arranged in parallel along the central line of the hollow pipe body at the front end part, the hollow pipe body at the tail end part is provided with a group of connecting grooves matched with the connecting protrusions, and the tail end of the connecting grooves at one side is higher than the tail end of the connecting grooves at the other side along the extending end direction of the hollow pipe body at the tail end part, so that the straight line of the central line of the hollow pipe body at the tail end part is bent relative to the straight line of the central line of the hollow pipe body at the front end part;
or a group of connecting bulges are arranged on the hollow pipe body at the tail end in parallel, the connecting bulges are arranged in parallel along the central line of the hollow pipe body at the tail end, a group of connecting grooves matched with the connecting bulges are arranged on the hollow pipe body at the head end, and the tail end of the connecting groove at one side is higher than the tail end of the connecting groove at the other side along the extending end direction of the hollow pipe body at the head end, so that the straight line of the central line of the hollow pipe body at the tail end is bent relative to the straight line of the central line of the hollow pipe body at the head end.
The bending assembly further comprises a middle section hollow pipe body, and the middle section hollow pipe body is arranged between the head end hollow pipe body and the tail end hollow pipe body;
the connecting protrusion is arranged at one end of the middle section hollow pipe body, which is close to the tail end hollow pipe body, and is arranged in parallel along the central line of the middle section hollow pipe body, a group of connecting grooves matched with the connecting protrusion are arranged at one end of the middle section hollow pipe body, which is close to the head end hollow pipe body, and the tail end of the connecting groove at one side is higher than the tail end of the connecting groove at the other side along the extending end direction of the head end hollow pipe body;
or the one end that is close to the hollow body of head end portion of the hollow body of middle section portion is provided with the connection arch and connects protruding along the hollow body of middle section portion place central line parallel arrangement, the hollow body of middle section portion is close to the hollow body of terminal portion one end be provided with a set of with connect protruding matched with connection recess, along the direction of the end of stretching out of the hollow body of head end portion, the end of one side connection recess is higher than the end of opposite side connection recess.
The driving member is a linear support member coupled to the end of the bending assembly.
The linear support is a wire.
The driving piece is a pneumatic driving component.
To the aforesaid problem, this application adopts the kink design of flexible for the first time, provides a medical needle. In the prior art, a medical needle generally adopts a linear type and bending type rigid structure; if a linear needle tube structure is adopted, the needle tube can only normally move in a linear way; if a curved rigid needle tube structure is adopted, the motion curve of the needle tube is arc-shaped, and if the needle tube is used for the structure of a blood vessel in a tissue, great uncertainty exists.
To this end, the applicant provides a completely new medical needle structure. In the application, the needle comprises a linear needle tube and a flexible needle body; in the application, the tail end of the linear needle tube is provided with a bendable bending part, a cavity is arranged in the bending part, and the cavity in the bending part is communicated with the inner cavity of the linear needle tube and forms a puncture cavity for the movement of the flexible needle body; simultaneously, the flexible needle body is arranged in the puncture cavity, and the flexible needle body can deform according to the bending degree of the bending part when the bending part bends. Based on the structure, when the device is used, the linear needle tube firstly penetrates into the vicinity of a blood vessel of a tissue, and then the bending part arranged at the tail end of the linear needle tube penetrates out of the tube body of the linear needle tube; the bending part bends in the advancing process, so that the linear needle tube and the cavity in the bending part form a linear section and a puncture cavity of the bending section connected with the linear section; at this time, the flexible needle body moves along the puncture cavity, when the flexible needle body passes through the bending part, the movement track of the needle head is changed according to the bending of the bending part, so that a linear-arc-linear movement track is formed, and the flexible needle body passes out from the vicinity of the puncture end of the medical needle or the position appointed by a doctor; meanwhile, on the premise of minimum puncture path, effective blocking or ligation of corresponding organs or tissues is realized. By adopting the mode, the movement track of the flexible needle body is controllable, the uncertainty in the needle body puncturing process and the operation difficulty can be effectively reduced, and the method has extremely high application value and extremely good application prospect.
The blood vessel blocking device is ingenious in conception, reasonable in design and convenient to use, can effectively block blood vessels on the premise of damaging tissues as little as possible, reduces blood overflow, and has important progress significance for improving survival probability of patients.
Drawings
The invention will now be described by way of example and with reference to the accompanying drawings in which:
fig. 1 is a schematic view of a prior art medical surgical needle.
Fig. 2 is a schematic structural view of the medical needle in example 1.
FIG. 3 is a cross-sectional view of the linear needle cannula of example 1 taken along the A-A direction.
FIG. 4 is a cross-sectional view taken along the direction A-A of the linear needle cannula of example 1.
FIG. 5 is a cross-sectional view taken along the direction A-A of the linear needle cannula of example 1.
Fig. 6 is a schematic structural view of a hollow tube at the front end of the bent portion in embodiment 2.
Fig. 7 is a schematic structural diagram of a hollow tube body of a middle section of the bending portion in embodiment 2.
Fig. 8 is a schematic structural view of a hollow tube at the end of the bent portion in embodiment 2.
The marks in the figure: 1. the anti-skid needle comprises a handle, 2, a needle body, 3, a needle head, 4, a needle hole, 5, anti-skid particles, 6, a bending part, 7, a linear needle tube, 8, a flexible needle body, 9, a bending part, 10, a flange, 11, a connecting protrusion, 12 and a connecting groove.
Detailed Description
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
Example 1
As shown, the medical needle of this embodiment includes a linear needle tube and a flexible needle body. The linear needle tube adopts a rigid needle tube. In this embodiment, the end of the linear needle tube is provided with a bendable bending portion, and a cavity is provided in the bending portion. The bending part adopts a flexible needle tube, and the extending end of the bending part is arc-shaped. In this embodiment, the protruding end of the bending portion is 1/360 to 7/8 of an arc, preferably 1/2 of an arc.
The cavity in the bending part is communicated with the inner cavity of the linear needle tube, and forms a puncture cavity for the movement of the flexible needle body, and the flexible needle body is arranged in the puncture cavity. In the normal case, the bending part is all arranged inside the linear needle tube; when the needle tube is used, the bending part extends out relative to the linear needle tube and is bent; when the bending part reaches a required position, the flexible needle body passes through the puncture cavity, changes according to the shape of the puncture cavity and moves towards one end close to the puncture or the direction appointed by a doctor; meanwhile, the flexible needle body drives the medical wire to pass out from the vicinity of the puncturing end, so that the effective blocking or ligature of the corresponding organ or tissue is realized on the premise of minimum puncturing path.
As shown in fig. 3, a linear needle cannula is shown in a circular shape in a cross section perpendicular to its centerline. Based on functional considerations for the structure, and the design of simplified processing techniques, applicant has shown cross-sectional views of two different structures of linear syringes: as shown in fig. 4, it is C-shaped; as shown in FIG. 5, the straight needle tube is U-shaped in cross section perpendicular to the center line of the straight needle tube, and the U-shaped ends are respectively provided with a flange. When the whole bending part is positioned in the linear needle tube, the shape of the bending part is restrained by the linear needle tube. When the bending part stretches out relative to the linear needle tube, the stretching end of the bending part is arc-shaped, and the flexible needle body can move in the bending part in an arc shape.
Example 2
The medical needle of this embodiment includes a linear needle tube and a flexible needle body. The linear needle tube adopts a rigid needle tube. In this embodiment, the end of the linear needle tube is provided with a bendable bending portion, and a cavity is provided in the bending portion. The cavity in the bending part is communicated with the inner cavity of the linear needle tube and forms a puncture cavity for the movement of the flexible needle body.
As a simplest structure, the bending part of the embodiment comprises a bending component and a driving piece for driving the bending component to move, wherein the bending component comprises a head end hollow pipe body movably connected with the linear needle tube and a tail end hollow pipe body connected with the head end. As a variant, the bending assembly comprises a head end hollow tube movably connected with the linear needle tube, a tail end hollow tube connected with the head end and a middle section hollow tube, wherein the middle section hollow tube is arranged between the head end hollow tube and the tail end hollow tube. In this embodiment, the hollow body of middle section portion is a plurality of groups, and the hollow body of middle section portion links to each other in proper order and constitutes central subassembly, and central subassembly sets up between the hollow body of head end portion and the hollow body of terminal portion.
The connecting protrusions are arranged on the hollow pipe body at the head end in parallel, the connecting protrusions are arranged in parallel along the central line of the hollow pipe body at the head end, a group of connecting grooves matched with the connecting protrusions are formed in one end, close to the hollow pipe body at the head end, of the hollow pipe body at the middle section, and the tail end of the connecting groove at one side is higher than the tail end of the connecting groove at the other side along the extending end direction of the hollow pipe body at the head end. The connecting protrusion is arranged at one end of the middle section hollow pipe body, which is close to the tail end hollow pipe body, and is arranged in parallel along the center line of the middle section hollow pipe body; the hollow pipe body at the tail end part is provided with a group of connecting grooves matched with the connecting protrusions, and along the extending end direction of the hollow pipe body at the tail end part, the tail end of the connecting groove at one side is higher than the tail end of the connecting groove at the other side, so that the straight line of the central line of the hollow pipe body at the tail end part is bent relative to the straight line of the central line of the hollow pipe body at the head end part.
In this embodiment, the driving member may be a metal wire connected to the end of the bending component, and the bending portion is driven to bend by the metal wire; the driving piece can also be a pneumatic driving component, and the bending part is driven to bend by starting the driving component.
In this embodiment, the linear needle cannula is circular in cross section perpendicular to its centerline. Meanwhile, two cross-sectional views of linear needle tubes with different structures can be adopted: a C shape; the other linear needle tube is U-shaped in cross section perpendicular to the central line of the needle tube, and the tail ends of the U-shape are respectively provided with a flange.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.