CN117643493A - Puncture needle fixing device - Google Patents

Abstract

The invention relates to a puncture needle fixing device, which comprises a supporting unit, a rotating unit, an angle locking unit and a clamping unit; the support unit is provided with an attachment piece for attaching to a body surface, the rotation unit comprises a first rotation piece and a second rotation piece which are arranged in a crossing way, and the first rotation piece and the second rotation piece are respectively provided with a first sliding groove and a second sliding groove which extend along respective axes; the angle locking unit comprises a fixed rod and an angle locking piece, wherein the fixed rod passes through the crossing area of the first sliding groove and the second sliding groove and can slide in the first sliding groove and the second sliding groove; the angle locking piece is used for locking the fixed rod; the clamping unit comprises a clamping piece and a clamping locking piece, wherein the clamping piece is fixedly connected with the fixing rod and comprises a clamping part capable of clamping the puncture needle. The puncture needle fixing device can fix the depth and the angle of the puncture needle after the puncture is completed.

Description

Puncture needle fixing device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a puncture needle fixing device.

Background

With the continuous progress of medical imaging technology and biophysical disciplines, modern tumor minimally invasive ablation treatment technology is rapidly developed and is applied to more extensive clinic. Minimally invasive ablation treatment is mainly conducted through medical images such as ultrasound, CT and MRI, a puncture needle is percutaneously punctured into a target focus, and in-situ tumor complete inactivation is achieved through energy release at the needle head of the puncture needle. Compared with surgical operation treatment, the minimally invasive ablation treatment has the advantages of small wound, low cost, short patient hospitalization time and the like.

After the puncture is completed, in the treatment process, due to the gravity of the puncture needle and the peristaltic influence of internal organs of a patient, the puncture needle can slide in the puncture depth direction and incline in the puncture angle direction, and if the puncture needle slides inwards or inclines into important tissues, secondary damage is caused to the patient. How to reliably limit the depth of the puncture needle and avoid the puncture needle from slipping or tilting is a technical problem to be solved urgently by the person skilled in the art.

At present, after the puncture is finished, a medical adhesive tape is used for sticking and fixing a puncture needle and a handle part of the puncture needle in clinic to prevent the puncture needle from tilting or sliding in the treatment process; however, the medical adhesive tape sticking mode cannot firmly, reliably and stably solve the problem of oblique sliding of the puncture needle.

In addition, in the prior art, a support for positioning and guiding during puncture is also provided, and the positioning and guiding support can effectively reduce the puncture difficulty of doctors, remarkably reduce the image scanning times and reduce the radiation exposure of patients. Meanwhile, the positioning guide bracket also plays a role in supporting the puncture needle, so that the puncture needle is not easy to topple over. However, since some experienced doctors do not need positioning guidance during the puncturing process, and only need to fix the puncture needle after the puncturing is completed, and since the puncture needle of the positioning guidance bracket can only be locked in the guide tube, the positioning guidance bracket is not applicable to the situation, and therefore, a device for conveniently fixing the puncture needle after the puncturing is completed is necessary to be developed to solve the corresponding problem.

Disclosure of Invention

The invention aims to provide a puncture needle fixing device which can fix the depth and the angle of a puncture needle after the puncture is completed and can effectively avoid the puncture needle from slipping or tilting.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

a puncture needle fixing device comprising:

a support unit having an attachment for attachment to a body surface;

the rotating unit comprises a first rotating piece and a second rotating piece which are arranged in a crossing way, the first rotating piece and the second rotating piece are respectively and movably connected to the supporting unit, and the first rotating piece and the second rotating piece are respectively provided with a first chute and a second chute which extend along respective axes;

the angle locking unit comprises a fixed rod and an angle locking piece, wherein the fixed rod passes through the crossing area of the first sliding groove and the second sliding groove and can slide in the first sliding groove and the second sliding groove; the angle locking piece is used for locking the fixed rod so that the fixed rod cannot slide in the first sliding groove and the second sliding groove; and

the clamping unit comprises a clamping piece and a clamping locking piece, wherein the clamping piece is fixedly connected with the fixing rod and comprises a clamping part capable of clamping the puncture needle, and the clamping locking piece is in a locking state for locking the puncture needle on the clamping piece and an unlocking state for unlocking the puncture needle from the clamping piece.

In one embodiment, the clamping piece comprises two clamping pieces which are oppositely arranged, one of the two clamping pieces is a fixed clamping piece fixedly connected with the fixed rod, and the other clamping piece is a movable clamping piece which can move close to and away from the fixed clamping piece; the clamping locking piece is a screw rod, and the screw rod is connected with the fixed clamping piece and the movable clamping piece.

In one embodiment, the fixed clamping piece comprises a sleeve part and a first sheet body, wherein the upper end of the sleeve part is fixedly connected with the first sheet body, and the lower end of the sleeve part is fixedly connected with the fixing rod.

In one embodiment, the movable clamping piece comprises a second piece body opposite to the first piece body, and one of guide posts and guide holes matched with the guide posts are respectively arranged on the first piece body and the second piece body.

In one embodiment, the clamping portions are located at opposite ends of the clamping sheet.

In one embodiment, the fixed clamping piece and/or the movable clamping piece are/is provided with a blocking convex column at the outer peripheral side of the clamping part, and the blocking convex column extends towards the other clamping piece.

In one embodiment, the clamping portion is provided with a clamping washer.

In one embodiment, the fixing rod comprises a first limiting part and a second limiting part, the first rotating part is provided with a clamping groove matched with the first limiting part, and the first limiting part is positioned in the clamping groove and matched with the clamping groove to prevent the fixing rod from rotating; the second limiting part is positioned in the second sliding groove, and the first limiting part and the second limiting part are matched together to enable the fixing rod to be incapable of moving along the axial direction.

In one embodiment, the angle locking member comprises a locking member body, wherein the middle part of the locking member body is provided with a through hole which axially penetrates through the locking member body and can be sleeved on the fixing rod, the locking member body is in threaded connection with the fixing rod, and the locking member body is axially moved on the fixing rod to realize switching between a locking state and an unlocking state.

In one embodiment, the bottom of the locking member body is a curved surface that is matched with the top surface of the second rotating member.

The puncture needle fixing device has the advantages that the angle and the position of the clamping unit can be adjusted through the rotating unit, so that the puncture needle after the puncture is completed can be clamped and fixed by the clamping unit at a proper position, the depth and the angle of the puncture needle can be fixed, and further secondary damage to a patient caused by sliding or tilting of the puncture needle is avoided.

Drawings

Fig. 1 shows a schematic perspective view of a lancet holder.

Fig. 2 shows a schematic view of the base unit.

Fig. 3 shows a schematic view of a rotary unit.

Fig. 4 shows a schematic view of the fixing rod.

Fig. 5 shows a schematic view of the angle lock.

Fig. 6 shows a cross-sectional view of the needle holder in a view direction.

Fig. 7 shows a cross-sectional view of the needle holder in another view.

Fig. 8 shows a schematic view of a clamping unit.

Fig. 9 shows a schematic view of a fixed grip tab.

Fig. 10 shows a schematic view of the movable grip tab.

Fig. 11 shows a schematic view of a step of clinically fixing the puncture needle by the puncture needle fixing device.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the objects, features and advantages of the present invention will be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the invention, but rather are merely illustrative of the true spirit of the invention.

In the following description, for the purposes of explanation of various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment may be practiced without one or more of the specific details. In other instances, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and variations such as "comprises" and "comprising" will be understood to be open-ended, meaning of inclusion, i.e. to be interpreted to mean "including, but not limited to.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clarity of presentation of the structure and manner of operation of the present invention, the description will be made with the aid of directional terms, but such terms as "forward," "rearward," "left," "right," "outward," "inner," "outward," "inward," "upper," "lower," etc. are to be construed as convenience, and are not to be limiting.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

As shown in fig. 1, the invention provides a puncture needle fixing device, which is used for fixing a puncture needle after puncture is completed, so that the puncture needle is prevented from sliding in the puncture depth direction and tilting in the puncture angle direction due to gravity of the puncture needle and peristaltic influence of internal organs of a patient, and further secondary damage to the patient caused by inward sliding or tilting of the puncture needle into important tissues is avoided. The puncture needle fixing device 1 includes a supporting unit 11, a rotating unit 12, an angle locking unit 13, and a clamping unit 14. The needle may be an ablation needle.

Wherein, referring to fig. 1 and 2, the support unit 11 includes a base 111 and a plurality of side wings 112 extending from a circumference of the base 111, the side wings 112 having attachment pieces 113 toward a bottom of the body surface for attachment to the body surface. The surface of the attachment member 113 facing the body surface has an adhesive property that can be adhered to the body surface of the patient so that the entire puncture needle fixing device is fixed to the body surface of the patient. The number of wings 112 is not limited, typically three or four. Similarly, the shape of the base 111 is not limited, and may be circular, rectangular, polygonal, or the like, and is generally circular. The top surface of the side wings 112 facing away from the body surface may also be provided with graduations 114 to facilitate intraoperative distance confirmation. In this embodiment, the outer shape of the base 111 is circular, the number of the wings 112 is four, the four wings are uniformly distributed around the base 111, and an attachment 113 is connected to the bottom of each wing. The outer surface of each attachment 113 may also be affixed with release paper, which may be adhered to the patient's body surface for fixation during surgery directly after the release paper has been torn away.

Referring to fig. 1 and 3, the rotation unit 12 includes a first rotation member 121 and a second rotation member 122 disposed to cross each other, and the first rotation member 121 and the second rotation member 122 are movably connected to the base 111 of the support unit 11, respectively. The first and second rotating members 121 and 122 are provided with first and second slide grooves 1211 and 1221, respectively, extending along respective axes. The first rotating member 121 and the second rotating member 122 are both in semicircular or approximately semicircular arc structures, two ends of the first rotating member 121 are respectively provided with a first rotating shaft 1212 coaxially arranged and pivoted with the base 111, two ends of the second rotating member 122 are respectively provided with a second rotating shaft 1222 coaxially arranged and pivoted with the base 111, the base 111 is provided with shaft holes matched with the first rotating shaft 1212 and the second rotating shaft 1222, and the first rotating shaft 1212 and the second rotating shaft 1222 extend into the corresponding shaft holes so that the first rotating member 121 can rotate by taking the first rotating shaft 1212 as a shaft, and the second rotating member 122 can rotate by taking the second rotating shaft 1222 as a shaft. The first rotating shaft 1212 and the second rotating shaft 1222 are disposed vertically, so that the first rotating member 121 and the second rotating member 122 are disposed vertically and cross each other, wherein the active area of the second rotating member 122 is located above the first rotating member 121, such that the active areas of the two rotating members will not interfere with each other.

Referring to fig. 1, 4 to 7, the angle locking unit 13 includes a fixing rod 131 and an angle locking member 132, and the fixing rod 131 passes through an intersection area of a first slide groove 1211 of the first rotary member 121 and a second slide groove 1221 of the second rotary member 122 at the same time and is slidable in the first slide groove 1211 and the second slide groove 1221. The fixing rod 131 includes a first limiting portion 1311 and a second limiting portion 1312, a clamping groove 1213 is disposed on the first rotating member 121 and matched with the first limiting portion 1311, and the first limiting portion 1311 is located in the clamping groove 1213 and cooperates with the clamping groove 1213 to prevent the fixing rod 131 from rotating. The second limiting portion 1312 is located in the second sliding groove 1221, and the first limiting portion 1311 and the second limiting portion 1312 cooperate together to prevent the fixing rod 131 from moving axially.

The angle locking member 132 is used to lock the fixing rod 131 to the first rotating member 121 and the second rotating member 122, so that the fixing rod 131 cannot slide in the first chute 1211 and the second chute 1221. The angle locking member 132 in this embodiment is a locking member locked by rotation, and includes a generally circular locking member body 1321, the middle portion of the locking member body 1321 has a through hole 1322 penetrating the locking member body along the axial direction and being sleeved on the fixing rod 131, a first internal thread 1323 matching with the external thread 1313 on the fixing rod 131 is disposed in the through hole 1322, and the first internal thread 1323 cooperates with the external thread 1313 to allow the locking member body 1321 to move in the axial direction of the fixing rod 131. When the locking member body 1321 moves toward the first rotating member 121, the first limiting portion 1311 of the fixing rod 131 cooperates with the bottom of the locking member body 1321 to lock the fixing rod 131 on the first rotating member 121 and the second rotating member 122, and due to the locking of the fixing rod 131, the positions of the first rotating member 121 and the second rotating member 122 are also locked and cannot move around the respective rotation axes, so that the position of the fixing rod 131 is determined. When the locking member body 1321 moves away from the first rotating member 121, the fixing rod 131 is unlocked and can slide in the first slide slot 1211 and the second slide slot 1221, so that the position and angle of the fixing rod 131 can be adjusted.

Preferably, in this embodiment, the bottom of the locking member body 1321 is a pressing surface 1324 matching with the cambered surface of the second rotating member 122, so that the locking member body 1321 has a larger contact surface with the second rotating member 122, and the second rotating member 122 is prevented from being deformed by extrusion, so that the locking member body 1321 can better lock the fixing rod 131.

Further preferably, the retaining member body 1321 is further provided with first ribs 1325 circumferentially spaced apart, and the first ribs 1325 can increase the holding friction between the hand of the operator and the retaining member body 1321, so as to facilitate the operation during the operation.

Referring to fig. 1, 6-10, the clamping unit 14 includes a clamping member for receiving the lancet, and a clamping lock member for locking and unlocking the lancet to and from the clamping member. The clamping member in this embodiment includes two opposite clamping pieces, one of the two clamping pieces is a fixed clamping piece 141 fixedly connected to the fixing rod 131, and the other clamping piece is a movable clamping piece 142 capable of moving closer to and farther from the fixed clamping piece 141. Specifically, the fixed clamping piece 141 includes a sleeve portion 1411 and a first body 1412, the upper end of the sleeve portion 1411 is fixedly connected with the first body 1412, and the lower end of the sleeve portion 1411 is fixedly connected with the fixing rod 131, so that the position and angle of the fixed clamping piece 141 can be adjusted along with the fixing rod 131. In this embodiment, the sleeve portion 1411 is screwed and fixed to the fixing rod 131.

The movable clamp piece 142 includes a second piece 1421 disposed opposite to the first piece 1412 of the fixed clamp piece 141, the second piece 1421 is connected to the first piece 1412 by a screw 143 as a clamp locking member, and the movable clamp piece 142 is movable toward the fixed clamp piece 141 along with rotation of the screw 143, so that the puncture needle between the fixed clamp piece 141 and the movable clamp piece 142 is clamped and fixed. Similarly, when the screw 143 rotates in the opposite direction, the movable clamp plate 142 can move away from the fixed clamp plate 141, so that the fixed clamp plate 141 and the movable clamp plate 142 can not clamp the puncture needle any more, and the puncture needle can be adjusted at this time.

Preferably, at least one guide post 1413 is disposed on the first body 1412 of the fixed clamping piece 141, the guide post 1413 extends toward the second body 1421, a guide hole 1422 is disposed on the second body 1421 and matched with the guide post 1413, and the guide post 1413 extends into the corresponding guide hole 1422 to guide the movement of the movable clamping piece 142. In addition, preferably, when the number of the guide posts 1413 is one, the guide posts 1413 are non-circular in shape, so that the screw 143 is prevented from rotating together with the movable clamp plate 142; when the number of the guide posts 1413 is two or more, the shape of the guide posts 1413 is not limited, and the rotation of the screw 143 with the driving clip 142 can be prevented.

Preferably, the opposite sides of the first sheet 1412 are a first clamping portion 1414 for clamping the puncture needle, and the opposite sides of the second sheet 1421 are a second clamping portion 1423 for clamping the puncture needle, so that the clamping areas of the clamping unit 14 are located at the two sides of the clamping member, which is convenient for clamping the puncture needle during operation and is not affected by other components. More preferably, the first clamping portion 1414 is provided with a first gasket 1415, the second clamping portion 1423 is provided with a second gasket 1424, and the first gasket 1415 and the second gasket 1424 are made of a material which is softer and has a certain elastic deformability, such as rubber, silica gel, etc., so that the clamping stability of the clamping portion on the puncture needle can be improved, and the puncture needle is not easily damaged.

Referring to fig. 8 and 10 again, a blocking boss 1425 is disposed on the outer periphery of the second clamping portion 1423, the blocking boss 1425 extends toward the first clamping portion 1414, and when the second clamping portion 1423 and the first clamping portion 1414 clamp the puncture needle, the blocking boss 1425 can block the puncture needle located between the second clamping portion 1423 and the first clamping portion 1414, so that the puncture needle can be prevented from being separated from the gap of the clamping portion due to vibration or incomplete locking of the clamping portion. Of course, the blocking boss 1425 may be provided on the outer periphery of the first clamping portion 1414, or the blocking boss 1425 may be provided on both the first clamping portion 1414 and the second clamping portion 1423.

Referring to fig. 11, the method for using the puncture needle fixing device in the operation provided in this embodiment is as follows:

1) Firstly, a needle insertion path of a puncture needle is planned through scanning of medical imaging equipment, needle insertion points on skin are determined, the point A in fig. 11a represents the needle insertion points, the solid line B represents the skin of a patient, and the shadow area C represents a focus.

2) Sticking the puncture needle fixing device on the skin of a patient, so that the needle inlet point is positioned in the area between the two side wings of the puncture needle fixing device base, as shown in fig. 11 b;

3) Puncturing the puncture needle through the needle insertion point and the planned needle insertion path; when the puncture is performed to a certain depth, the position and the angle of a fixing rod of the puncture needle fixing device are adjusted to enable the puncture needle to be positioned at a proper position between the two clamping pieces, and then the angle locking piece is rotated to lock the position and the angle of the fixing rod; then the screw is rotated to enable the clamping piece to clamp the puncture needle, whether the needle insertion path accords with the plan is checked under the medical imaging equipment, and the adjustment is performed in time until the puncture is completed, as shown in fig. 11 c.

While the preferred embodiments of the present invention have been described in detail, it will be appreciated that those skilled in the art, upon reading the above teachings, may make various changes and modifications to the invention. Such equivalents are also intended to fall within the scope of the claims appended hereto.

Claims (10)

1. A lancet holder, comprising:

a support unit having an attachment for attachment to a body surface;

the rotating unit comprises a first rotating piece and a second rotating piece which are arranged in a crossing way, the first rotating piece and the second rotating piece are respectively and movably connected to the supporting unit, and the first rotating piece and the second rotating piece are respectively provided with a first chute and a second chute which extend along respective axes;

the angle locking unit comprises a fixed rod and an angle locking piece, wherein the fixed rod passes through the crossing area of the first sliding groove and the second sliding groove and can slide in the first sliding groove and the second sliding groove; the angle locking piece is used for locking the fixed rod so that the fixed rod cannot slide in the first sliding groove and the second sliding groove; and

the clamping unit comprises a clamping piece and a clamping locking piece, wherein the clamping piece is fixedly connected with the fixing rod and comprises a clamping part capable of clamping the puncture needle, and the clamping locking piece is in a locking state for locking the puncture needle on the clamping piece and an unlocking state for unlocking the puncture needle from the clamping piece.

2. The lancet holder of claim 1, wherein the holding member comprises two holding pieces arranged in opposition, one of the two holding pieces being a fixed holding piece fixedly connected to the fixing rod, the other being a movable holding piece movable in a direction approaching and moving away from the fixed holding piece; the clamping locking piece is a screw rod, and the screw rod is connected with the fixed clamping piece and the movable clamping piece.

3. The lancet holder of claim 2, wherein the retaining tab comprises a sleeve portion and a first tab, the upper end of the sleeve portion being fixedly connected to the first tab, the lower end of the sleeve portion being fixedly connected to the securing lever.

4. The lancet holder of claim 3, wherein the movable holding piece comprises a second piece body disposed opposite to the first piece body, and one of guide posts and guide holes matched with the guide posts are respectively disposed on the first piece body and the second piece body.

5. The lancet holder of claim 2, wherein the gripping portions are located at opposite ends of the gripping sheet.

6. The puncture needle fixing device according to claim 2, wherein the fixed clamping piece and/or the movable clamping piece is provided with a blocking convex column at the outer peripheral side of the clamping part, and the blocking convex column extends to the direction of the other clamping piece.

7. The lancet holder of claim 2, wherein the clamping portion is provided with a clamping washer.

8. The puncture needle fixing device according to claim 1, wherein the fixing rod comprises a first limit part and a second limit part, a clamping groove matched with the first limit part is formed in the first rotary part, and the first limit part is positioned in the clamping groove and matched with the clamping groove to prevent the fixing rod from rotating; the second limiting part is positioned in the second sliding groove, and the first limiting part and the second limiting part are matched together to enable the fixing rod to be incapable of moving along the axial direction.

9. The needle holder of claim 8, wherein the angular locking member comprises a locking member body, wherein a central portion of the locking member body has a through hole extending axially through the locking member body and being capable of being sleeved on the fixing rod, the locking member body is in threaded connection with the fixing rod, and the axial movement of the locking member body on the fixing rod enables switching between a locked state and an unlocked state.

10. The lancet holder of claim 9, wherein the bottom of the locking member body is a curved surface that mates with the top surface of the second rotating member.