CN110680499A - Positioning device and ablation equipment - Google Patents
Positioning device and ablation equipment Download PDFInfo
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- CN110680499A CN110680499A CN201910970170.5A CN201910970170A CN110680499A CN 110680499 A CN110680499 A CN 110680499A CN 201910970170 A CN201910970170 A CN 201910970170A CN 110680499 A CN110680499 A CN 110680499A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1477—Needle-like probes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00273—Anchoring means for temporary attachment of a device to tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/1869—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves with an instrument interstitially inserted into the body, e.g. needles
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Abstract
The embodiment of the invention provides a positioning device and ablation equipment, and relates to the field of medical instruments. Aims to solve the problem that the existing ablation needle is easy to cause accidental injury to a patient after being inserted into a focus. The positioning device comprises a base, an adjusting piece and a plurality of elastic claws; the elastic claw is fixed on the base, the elastic claw is provided with a clamping part, a plurality of clamping parts form a channel for passing through the ablation needle, and the adjusting piece is matched with the elastic claws so that the clamping parts of the elastic claws are close to or far away from each other. The ablation device includes a positioning device. The plurality of clamping parts are far away from each other, the ablation needle passes through the channel, the plurality of clamping parts are close to each other, and the ablation needle is clamped and cannot move along the axial direction of the ablation needle; after the ablation needle is inserted into a focus, the base is fixed on a preset object, the ablation needle cannot swing along the radial direction of the ablation needle, the positioned ablation needle is not easy to move along the axial direction along with the respiration of a patient after being inserted into the focus, and is not easy to swing along the radial direction along with the twisting of the patient, and accidental injury is reduced.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a positioning device and ablation equipment.
Background
The thermal ablation operation is increasingly applied to minimally invasive operation treatment of liver tumor, kidney tumor, gynecological tumor, pulmonary nodule, thyroid nodule and the like due to the advantages of minimally invasive operation, high efficiency, safety, easy recovery after operation and the like. The thermal ablation operation comprises microwave ablation, radio frequency ablation, laser ablation and the like, wherein the microwave ablation and the radio frequency ablation are clinically main thermal ablation means, and the common characteristics of the microwave ablation and the radio frequency ablation are that an antenna or an electrode similar to a needle is inserted into a focus, and a tumor is inactivated and denatured under the action of microwave energy or the electrode, so that the purpose of treatment is achieved.
At present, when an ablation needle is clinically used, the ablation needle is mostly inserted into a focus through skin under the guidance of medical images such as B-ultrasound and CT, but the inventor finds that the ablation needle is easy to cause accidental injury to a patient after being inserted into the focus.
Disclosure of Invention
The present invention aims to provide a positioning device which can improve the problem that the existing ablation needle is easy to cause accidental injury to a patient after being inserted into a focus.
It is also an object of the present invention to provide an ablation device that ameliorates the problem of the risk of accidental injury to the patient following insertion of an existing ablation needle into a lesion, for example.
Embodiments of the invention may be implemented as follows:
the embodiment of the invention provides a positioning device, which comprises: the adjusting part is arranged on the base; the base is used for being fixed on a preset object; one end of each elastic claw is fixed with the base, the other end of each elastic claw forms a clamping part, a channel for passing through the ablation needle is formed between the clamping parts of the elastic claws, and the adjusting piece is matched with the elastic claws so that the clamping parts of the elastic claws are close to or far away from each other.
In addition, the positioning device provided by the embodiment of the invention can also have the following additional technical characteristics:
optionally: the clamping parts of the elastic claws are uniformly distributed around a preset axis.
Optionally: the positioning device further comprises a positioning sleeve, one end of each elastic claw is connected with the positioning sleeve, and the positioning sleeve is connected with the base and rotates around the preset axis relatively.
Optionally: the base is provided with a first through hole, the positioning sleeve is provided with a clamping part, and the clamping part is movably clamped in the first through hole so as to enable the positioning sleeve and the base to rotate relatively; the joint portion is provided with the second and perforates, and passageway, second are perforated and first perforation communicate in proper order.
Optionally: the clamping portion comprises a plurality of clamping jaws which are uniformly distributed along a preset axis, the base is provided with a clamping groove communicated with the first through hole, and the clamping jaws are movably buckled in the clamping groove so that the positioning sleeve can relatively rotate relative to the base.
Optionally: the outer wall of the elastic claw is provided with a first inclined plane, and the adjusting piece is provided with a second inclined plane matched with the first inclined plane; the adjusting piece is in threaded fit with the positioning sleeve, and when the adjusting piece rotates relative to the positioning sleeve, the clamping parts of the elastic claws are close to or far away from each other under the matching of the first inclined plane and the second inclined plane.
Optionally: the outer wall of the positioning sleeve is convexly provided with a first pressing part, the adjusting piece is cylindrical, and the outer wall of the adjusting piece is convexly provided with a second pressing part;
when the first pressing part is close to or far away from the second pressing part, the adjusting piece rotates relative to the positioning sleeve, so that the clamping parts of the elastic claws are mutually far away from or close to each other.
Optionally: the positioning device also comprises an elastic piece which is simultaneously connected with the adjusting piece and the positioning sleeve, so that the clamping parts of the elastic claws have the tendency of moving close to each other.
Optionally: the elastic piece is a torsion spring;
the torsional spring cover is located between regulating part and the position sleeve, and the one end of torsional spring is fixed in the position sleeve, and the other end of torsional spring is fixed in the regulating part.
Optionally: the elastic part is a spring which is connected between the first pressing part and the second pressing part.
The positioning device and the ablation equipment of the embodiment of the invention have the beneficial effects that:
the adjusting piece is matched with the elastic claws to realize that the elastic claws approach to each other or separate from each other, when the elastic claws are far away from each other, the ablation needle can pass through the channel, and when the elastic claws approach to each other, the ablation needle is clamped and cannot move along the axial direction of the ablation needle; after the ablation needle is inserted into a focus, the base is fixed on a preset object, and the ablation needle cannot swing along the radial direction of the ablation needle, so that the ablation needle is not easy to move along the axial direction of the ablation needle along with the respiration of a patient after being inserted into the focus and also not easy to swing along the radial direction of the ablation needle along with the twisting of the patient, the part of the ablation needle left outside the body is positioned, secondary injury to the patient is avoided, and the problem that the conventional ablation needle is easy to cause accidental injury to the patient after being inserted into the focus is solved.
The ablation equipment comprises the positioning device, and the problem that the existing ablation needle is easy to cause accidental injury to a patient after being inserted into a focus can be solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a positioning device according to an embodiment of the present invention;
fig. 2 is a schematic partial structural diagram of a positioning device according to an embodiment of the present invention;
FIG. 3 is a schematic view of the positioning device and ablation needle assembly provided by an embodiment of the present invention;
FIG. 4 is a partial structural schematic view of the positioning device and ablation needle assembly provided in accordance with an embodiment of the present invention;
fig. 5 is a partial structural schematic view of a positioning sleeve in the positioning device according to an embodiment of the present invention;
FIG. 6 is a partial schematic structural view of an adjusting member in the positioning device according to an embodiment of the present invention;
FIG. 7 is a schematic partial structural view of a positioning device according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a first structure of a positioning device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a second structure of a positioning device according to an embodiment of the present invention.
Icon: 10-a positioning device; 11-an ablation needle; 100-a positioning sleeve; 110 — a first perimeter wall; 111-internal screw thread; 120-a second perimeter wall; 130-a connecting plate; 140-a first pressing part; 141-a first plate; 142-a second plate; 200-a clamping member; 201-elastic claws; 210-a limiting part; 211-a lead-in cone; 220-a clamping portion; 221-a first bevel; 222 — a first step surface; 202-jaws; 230-a movable part; 240-claw part; 241-a clamping surface; 242-clamping the step surface; 300-an adjustment member; 310-a third peripheral wall; 311-external thread; 320-assembly surface; 321-a second bevel; 322-a second step face; 330-a second pressing part; 331-a third plate; 332-a fourth plate; 400-a base; 410-a first perforation; 411-the lead-in section; 412-a spacing section; 420-an adhesive layer; 500-torsion spring; 600-spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
At present, when an ablation needle is clinically used, most ablation needles are percutaneously inserted into a focus under the guidance of medical images such as B-ultrasound and CT, and then are clamped and positioned by non-special instruments such as handrails or hemostats, but the ablation needle positioned in the mode still easily moves up and down along with the breathing of a patient or swings left and right along with the twisting of the patient, if the focus is close to a blood vessel, a nerve or other important organs, the shaking of the ablation needle can injure the blood vessel to cause massive hemorrhage in a human body or injure other organs to cause other complications (such as diaphragm on the upper part of a liver, pneumothorax and the like), besides, if the ablation needle moves to other parts in the body, tumor cell transplantation can be caused, the operation effect is reduced, the recurrence probability is increased, and accidental injury to the patient is caused. The positioning device and the ablation equipment provided by the embodiment can alleviate the technical problem.
In this embodiment, the ablation apparatus comprises an ablation needle 11 and a positioning device 10. The portion of the ablation needle 11 remaining outside the body is positioned by the positioning device 10.
The positioning device 10 provided in the present embodiment is described in detail below with reference to fig. 1 to 9.
Referring to fig. 1 and fig. 2, a positioning apparatus 10 provided in this embodiment includes: a base 400, an adjusting member 300 and a plurality of elastic claws 201; the base 400 is used for being fixed on a preset object; one end of the elastic claw 201 is fixed to the base 400, the other end of the elastic claw 201 forms a clamping portion 220, and referring to fig. 3, a channel for passing through the ablation needle 11 is formed between the clamping portions 220 of the elastic claws 201, and the adjusting member 300 is matched with the elastic claws 201 to enable the clamping portions 220 of the elastic claws 201 to approach or separate from each other. The preset object comprises a human body or other animals, and specifically refers to the skin surface of the human body.
Referring to fig. 2, with reference to fig. 3, the adjusting member 300 is adjusted, so that when the clamping portions 220 of the plurality of elastic claws 201 are away from each other, the opening of the passage is enlarged, and the ablation needle 11 passes through the adjusting member 300 and then passes through the passage; referring to fig. 4, the adjusting member 300 is adjusted again to make the holding portions 220 of the plurality of elastic claws 201 approach each other to clamp the shaft of the ablation needle 11; then under the guidance of medical images such as ultrasound, CT and the like, the ablation needle 11 is inserted into the focus to a proper position; adjusting the adjusting member 300 again to make the clamping portions 220 of the plurality of elastic claws 201 away from each other, so that the positioning device 10 can move relative to the ablation needle 11 until the base 400 can contact the preset object, and the base 400 is fixed on the surface of the preset object, thereby positioning the positioning device 10 and the ablation needle 11 on the skin surface of the preset object, and the ablation needle 11 cannot swing left and right along the radial direction of the ablation needle 11; the adjusting member 300 is adjusted again, so that the clamping portions 220 of the plurality of elastic claws 201 are close to each other to clamp the ablation needle 11, the ablation needle 11 cannot move along the channel, and the axial positioning of the ablation needle 11 is realized. The axial direction and the radial direction of the ablation needle 11 realize positioning, and after the ablation needle 11 is inserted into a focus, the part left outside the body is not easy to move up and down along with the respiration of a patient and swing left and right along with the twisting of the patient.
Referring to fig. 4, in the present embodiment, the clamping portions 220 of the plurality of elastic claws 201 are uniformly distributed around a predetermined axis. Specifically, the ablation needle 11 is in a round rod shape, which is described in a relative position in fig. 4, when the ablation needle 11 is vertically disposed, the preset axis is the axis of the ablation needle 11. The axis of the ablation needle 11 sandwiched between the plurality of clamping portions 220 coincides with the preset axis. The uniform distribution of the clamping portions 220 facilitates uniform clamping of the ablation needle 11. The number of the elastic claws 201 may be 3 to 8, and 6 in this embodiment.
With reference to fig. 4, in this embodiment, the positioning device 10 further includes a positioning sleeve 100, one end of each of the plurality of elastic claws 201 is connected to the positioning sleeve 100, and the positioning sleeve 100 is connected to the base 400 and rotates around a predetermined axis.
Specifically, the base 400 is fixed on the surface of a preset object to realize radial positioning of the ablation needle 11; the plurality of elastic claws 201 on the positioning sleeve 100 cooperate with the adjusting member 300 to clamp the ablation needle 11, so as to realize the axial positioning of the ablation needle 11. The positioning sleeve 100 is rotatably connected with the base 400 around a predetermined axis, and the positioning sleeve 100 can rotate relative to the base 400. After the ablation needle 11 is inserted into the lesion and the base 400 is fixed to the predetermined object, the ablation needle 11 cannot swing left and right, but the ablation needle 11 can also rotate with respect to the base 400 together with the positioning sleeve 100. During clinical practical use, if a doctor needs to move the position or change the position of the ablation needle 11 for other reasons in an operation, the ablation line at the tail of the ablation needle 11 is often driven to move, the ablation line drives the ablation needle 11 to rotate, at the moment, the ablation needle 11 and the positioning sleeve 100 can rotate independently of the base 400, the base 400 cannot be interfered by the rotation of the positioning sleeve 100, the moment can be transmitted to the base 400 when the ablation needle 11 is rotated in a prevention mode, and therefore the patient is influenced by indirect action on the patient, and the operation effect is influenced. In addition, the plurality of elastic claws 201 are fixed to the base 400 through the positioning sleeve 100, which facilitates the manufacturing process of the elastic claws 201 and the positioning sleeve 100. The position sleeve 100 may also be integrally formed with the base 400.
With reference to fig. 4, in the present embodiment, the base 400 is provided with a first through hole 410, the positioning sleeve 100 is provided with a clamping portion, and the clamping portion is movably clamped in the first through hole 410 to enable the positioning sleeve 100 and the base 400 to rotate relatively; the clamping portion is provided with a second through hole, and the channel, the second through hole and the first through hole 410 are communicated in sequence. The rotary connection between the positioning sleeve 100 and the base 400 is realized by the clamping connection between the clamping part and the first through hole 410, so that the positioning sleeve 100 and the base 400 are convenient and fast to assemble. Specifically, a gap is formed between an outer wall of the clamping portion clamped in the first through hole 410 and an inner wall of the first through hole 410, and the clamping portion is rotatable in the first through hole 410 to realize the rotation of the positioning sleeve 100 relative to the base 400.
With reference to fig. 4, in the present embodiment, the fastening portion includes a plurality of claws 202 uniformly distributed along a predetermined axis, the base 400 is provided with a fastening slot communicated with the first through hole 410, and the plurality of claws 202 are movably fastened in the fastening slot, so that the positioning sleeve 100 relatively rotates with respect to the base 400. The plurality of jaws 202 may be forced toward or away from each other. The plurality of claws 202 can be forced to approach each other and can be clamped into the first through hole 410, and the plurality of claws 202 can be forced to separate from each other and can be clamped into the clamping groove. This makes it easier for the snap-in portion to snap into the first through hole 410. Specifically, the jaws 202 are made of an elastic material, and a gap is formed between two adjacent jaws 202. A plurality of jaws 202 are provided around a preset axis for the ablation needle 11 to pass through.
With continued reference to fig. 4, in this embodiment, the outer wall of the elastic claw 201 is provided with a first inclined surface 221, and the adjusting member 300 is provided with a second inclined surface 321 engaged with the first inclined surface 221; the adjusting member 300 is in threaded engagement with the positioning sleeve 100, and when the adjusting member 300 rotates relative to the positioning sleeve 100, the plurality of elastic claws 201 are engaged with the first inclined surfaces 221 and the second inclined surfaces 321, and the clamping portions 220 of the plurality of elastic claws 201 move closer to or away from each other.
Referring to fig. 5, the relative positions in fig. 5 are shown. The outer wall of the positioning sleeve 100 is provided with a first circumferential wall 110. The inner wall of the positioning sleeve 100 comprises an internal thread 111 and a second peripheral wall 120 arranged in sequence from top to bottom. Wherein the major diameter of the internal thread 111 is larger than the diameter of the second peripheral wall 120. With reference to fig. 5, the outer wall of the positioning sleeve 100 is convexly provided with a first pressing portion 140, specifically, the first circumferential wall 110 of the positioning sleeve 100 is provided with the first pressing portion 140; the first pressing portion 140 includes a first plate 141 and a second plate 142 connected in sequence, the first plate 141 and the second plate 142 both extend along the axial direction of the positioning sleeve 100, and an included angle is formed between the first plate 141 and the second plate 142. The first plate 141 may have friction lines on opposite sides thereof, and the second plate 142 may have friction lines on opposite sides thereof.
With continued reference to FIG. 5, specifically, a clamping member 200 is disposed inside the locator sleeve 100. The middle part of the clamping piece 200 is connected with the second peripheral wall 120 of the positioning sleeve 100 through a connecting plate 130; the connection plate 130 has a ring shape. The part of the clamping member 200 above the connecting plate 130 is the upper half part of the clamping member 200, the upper half part is arranged at a distance from the internal thread 111 of the locating sleeve 100, the part of the clamping member 200 below the connection is the lower half part of the clamping member 200, and the lower half part is arranged at a distance from the second peripheral wall 120. The upper half of clamping piece 200 includes a plurality of elastic claw 201 that set gradually along circumference interval, has the clearance between two adjacent elastic claw 201, and elastic claw 201 is made by elastic material, therefore can be close to jointly when the clamping part 220 of a plurality of elastic claw 201 receives radial effort, and when not receiving radial effort, a plurality of elastic claw 201 return is in order to keep away from each other. The lower half of clamping piece 200 includes a plurality of jack catchs 202 along the interval setting in proper order of circumference, has the clearance between two adjacent jack catchs 202, and jack catch 202 is made by elastic material, therefore a plurality of jack catchs 202 receive radial effort can be close to each other, when not receiving radial effort, a plurality of jack catchs 202 return in order to keep away from each other under the effect of elastic force.
Continuing with fig. 5, the relative positions in fig. 5 are described. Specifically, the elastic claw 201 includes a limiting portion 210 and a clamping portion 220 connected in sequence from top to bottom, and the limiting portion 210 is disposed in a protruding manner relative to the clamping portion 220 along a radial direction; the side of the limiting part 210 is provided with a guiding conical surface 211, and the diameter of the guiding conical surface 211 is gradually increased from top to bottom; the outer wall of the clamping portion 220 is provided with a first inclined surface 221, the first inclined surface 221 is a conical surface, and the diameter of the first inclined surface 221 gradually increases from top to bottom; a first step surface 222 is provided between the introduction tapered surface 211 and the first inclined surface 221, and the first step surface 222 is provided in the horizontal direction. Specifically, the claw 202 includes a movable portion 230 and a claw portion 240 arranged in sequence from top to bottom, the claw portion 240 is arranged in a protruding manner relative to the movable portion 230 in a radial direction so as to form a clamping step surface 242 on the top side of the claw portion 240, and the clamping step surface 242 is arranged in a horizontal direction; the side of the claw 240 is provided with a clamping surface 241, and an included angle is formed between the clamping surface 241 and the clamping stepped surface 242.
With continued reference to fig. 5, the clamping member 200 is provided with a channel, which is open at both ends and sequentially penetrates the position-limiting portion 210, the clamping portion 220, the movable portion 230 and the claw portion 240.
Referring to fig. 6, the relative positions in fig. 6 are shown. The outer wall of the adjusting member 300 includes a third circumferential wall 310 and an external thread 311, which are arranged in sequence from top to bottom. The major diameter of the external thread 311 is smaller than the diameter of the third peripheral wall 310. The inner wall of the adjusting member 300 includes a mounting surface 320 and a second inclined surface 321 arranged in sequence from top to bottom, and a second step surface 322 is arranged between the mounting surface 320 and the second inclined surface 321. The mounting surface 320 is a cylindrical surface. The second inclined surface 321 is a conical surface, and the corresponding diameter of the second inclined surface 321 gradually increases from top to bottom.
In this embodiment, the adjusting member 300 is cylindrical, and the outer wall of the adjusting member 300 is provided with a second pressing portion 330 in a protruding manner; when the first pressing portion 140 approaches or leaves the second pressing portion 330, the adjusting member 300 rotates relative to the positioning sleeve 100, so that the clamping portions 220 of the plurality of elastic claws 201 move away or approach each other. Specifically, referring to fig. 6, the third circumferential wall 310 of the adjuster 300 is provided with a second pressing part 330; the second pressing portion 330 includes a third plate 331 and a fourth plate 332 connected in sequence, the third plate 331 and the fourth plate 332 both extend along the axial direction of the adjusting member 300, and an included angle is formed between the third plate 331 and the fourth plate 332. Wherein, the opposite sides of the third plate 331 may be provided with friction lines, and the opposite sides of the fourth plate 332 may also be provided with friction lines.
Referring to fig. 7, an adhesive layer 420 is adhered to the bottom of the base 400. The base 400 and the adhesive layer 420 may be fixed by gluing, snap-fastening, etc. The adhesive layer 420 may be a disposable product to avoid infection. The adhesive layer 420 is mainly made of medical adhesive material, such as medical gel, medical silica gel, etc., which can make the whole positioning device 10 tightly attached to the skin of the patient.
With continued reference to fig. 7, and with the relative positions shown in fig. 7, the first through hole 410 includes a guiding section 411 and a limiting section 412 connected in sequence from top to bottom. The introduction section 411 is provided with an introduction surface, the introduction surface is a conical surface, and the corresponding diameter of the introduction surface is gradually reduced from top to bottom. The limiting section 412 comprises a first wall and a second wall which are connected in sequence, the first wall is horizontally arranged, the second wall is vertically arranged, the second wall is connected with the first wall, the second wall and the bonding layer 420 form a clamping groove with an opening facing to the axial lead of the first through hole 410, and the clamping groove is a U-shaped groove. The first wall is connected to the introduction face of the introduction section 411. Specifically, the base 400 has a disk shape.
Referring to fig. 7, in the present embodiment, the assembling process of the adjusting member 300 and the positioning sleeve 100:
one end of the adjusting piece 300 provided with the external thread 311 is aligned between the clamping piece 200 and the positioning sleeve 100, so that the second inclined surface 321 of the adjusting piece 300 is abutted against the guiding conical surface 211 of the clamping piece 200, opposite forces of the adjusting piece 300 and the positioning sleeve 100 are generated by rotating relatively, radial acting force is generated on the plurality of elastic claws 201, and the limiting parts 210 of the plurality of elastic claws 201 are gradually close to each other. Until the second inclined surfaces 321 of the adjusting member 300 completely slide over the guiding conical surface 211 and then are matched with the first inclined surfaces 221 of the elastic claws 201, at this time, the first step surfaces 222 are attached to the second step surfaces 322, and the first step surfaces 222 prevent the adjusting member 300 from being unscrewed from the clamping member 200 and being separated from the clamping member 200. After the adjusting piece 300 is sleeved between the clamping piece 200 and the positioning sleeve 100, the external thread 311 of the adjusting piece 300 is in threaded connection with the internal thread 111 of the positioning sleeve 100, and in the process that the adjusting piece 300 rotates forwards and backwards relative to the positioning sleeve 100, the adjusting piece 300 moves upwards and downwards along the axial direction of the positioning sleeve 100. The second inclined surface 321 of the adjusting member 300 is engaged with the first inclined surface 221 of the clamping member 200, and during the process that the adjusting member 300 moves along the positioning sleeve 100 from top to bottom, the second inclined surface 321 of the adjusting member 300 abuts against the first inclined surface 221 of the clamping member 200, so that the clamping portions 220 of the plurality of elastic claws 201 are close to each other. During the movement of the adjusting member 300 along the positioning sleeve 100 from bottom to top, the plurality of elastic claws 201 move away from each other.
With continued reference to fig. 7, the claw portion 240 of the claw 202 is engaged with the first through hole 410. Specifically, the clamping surfaces 241 on the claws 202 act on the introduction surface of the introduction section 411 of the first through hole 410, the claws 202 are close to each other under the action of a radial acting force under the action of the introduction surface until the claws 240 of the claws 202 correspond to the limiting section 412 of the first through hole 410, the claws 240 are clamped into clamping grooves formed in the first wall, the second wall and the third wall under the action of an elastic restoring force, the clamping step surface 242 of the claw 240 is abutted against the first wall, the end part of the claw 240 is abutted against the third wall, and the limitation of the claw 240 on the limiting section 412 of the first through hole 410 is realized.
Referring to fig. 8 and fig. 7, the positioning device 10 further includes an elastic member, which is connected to the adjusting member 300 and the positioning sleeve 100, so that the clamping portions 220 of the plurality of elastic claws 201 have a tendency to move closer to each other.
In this embodiment, the elastic member is a torsion spring 500; the torsion spring 500 is sleeved between the adjusting member 300 and the positioning sleeve 100, one end of the torsion spring 500 is fixed to the positioning sleeve 100, and the other end of the torsion spring 500 is fixed to the adjusting member 300.
Referring to fig. 8 and fig. 7, specifically, a first groove is formed on the adjusting member 300, a second groove is formed on the positioning sleeve 100, the torsion spring 500 is sleeved between the adjusting member 300 and the positioning sleeve 100, a first end of the torsion spring 500 is fixed in the first groove, and a second end of the torsion spring 500 is fixed in the second groove. In the state shown in fig. 8, the adjuster 300 and the positioning sleeve 100 are screwed by the elastic force of the torsion spring 500, and the plurality of elastic claws 201 are in a state of being close to each other. In actual operation, the first pressing portion 140 and the second pressing portion 330 are simultaneously gripped, so that the distance between the first pressing portion 140 and the second pressing portion 330 is reduced, the two ends of the torsion spring 500 are close to each other, the torsion spring 500 is compressed, at this time, the adjusting member 300 moves upward relative to the positioning sleeve 100, and the elastic claws 201 are gradually separated from each other; after the first pressing portion 140 and the second pressing portion 330 are released, the adjusting member 300 and the positioning sleeve 100 are tightened by the elastic force of the torsion spring 500, and the plurality of elastic claws 201 approach each other again.
With continued reference to fig. 8 in conjunction with fig. 7, in the present embodiment, the installation process of the torsion spring 500 is as follows: firstly, fixing the positioning sleeve 100, then placing the torsion spring 500 at the top end of the positioning sleeve 100 to enable the torsion spring 500 to be approximately coaxially corresponding to the positioning sleeve 100, and fixing the second end of the torsion spring 500 in the second groove; then, an external tool (such as a pair of pliers, a wrench, etc.) is used for acting on the first end of the torsion spring 500, so that the distance between the first end and the second end is reduced, that is, the torsion spring 500 is compressed until the first end corresponds to the screwing position of the internal thread 111 of the positioning sleeve 100, then the adjusting piece 300 is clamped, so that the external thread 311 of the adjusting piece 300 is screwed into the positioning sleeve 100 from the screwing position, the threaded connection between the adjusting piece 300 and the positioning sleeve 100 is realized, and meanwhile, the first end of the torsion spring 500 is clamped into the first groove; after the release, the elastic force of the torsion spring 500 is restored, and the adjusting member 300 rotates relative to the positioning sleeve 100, so that the adjusting member 300 is screwed in, and the plurality of elastic claws 201 are close to each other. Similarly, the torsion spring 500 may be placed at the end of the adjusting member 300, the first end of the torsion spring 500 is clamped into the first groove, and then the adjusting member 300 is screwed with the positioning sleeve 100, and the second end of the torsion spring 500 is clamped into the second groove to complete the installation.
Referring to fig. 9 and fig. 7, in the present embodiment, the elastic member is a spring 600, and the spring 600 is connected between the first pressing portion 140 and the second pressing portion 330. Specifically, the spring 600 is connected between the second plate 142 and the fourth plate 332. In this embodiment, the installation process of the spring 600 is as follows: the external thread 311 of the adjusting member 300 is screwed into the internal thread 111 of the positioning sleeve 100, or the adjusting member 300 is partially screwed into the positioning sleeve 100, then an external tool (such as tweezers or pliers) is used to clamp two ends of the spring 600, compress the spring 600, and then clamp the spring 600 between the first pressing portion 140 and the second pressing portion 330, the first pressing portion 140 and the second pressing portion 330 are far away from each other under the action of the spring 600, the adjusting member 300 is screwed into the positioning sleeve 100, and the plurality of elastic claws 201 are close to each other.
Referring again to fig. 3 and 4, the operation of the positioning device 10 using the torsion spring 500 will be described in detail: simultaneously, the first pressing part 140 and the second pressing part 330 are held, so that the first pressing part 140 and the second pressing part 330 approach each other (approach toward a direction in which an included angle formed between the first pressing part 140 and the second pressing part 330 is smaller in fig. 3), at this time, the adjusting piece 300 rotates relative to the positioning sleeve 100 and moves upward along the axial direction of the positioning sleeve 100, the clamping parts 220 of the plurality of elastic claws 201 are far away from each other, and the ablation needle 11 penetrates through the adjusting piece 300, the clamping piece 200 and the base 400; releasing the first pressing part 140 and the second pressing part 330, clamping the ablation needle 11 by the clamping parts 220 of the elastic claws 201, and then inserting the ablation needle 11 into the lesion to a proper position under the guidance of medical images such as ultrasound, CT and the like; the first pressing part 140 and the second pressing part 330 are gripped again, the first pressing part 140 and the second pressing part 330 are clamped, the clamping parts 220 of the elastic claws 201 are separated from each other, the positioning device 10 moves relative to the ablation needle 11 (or the positioning device 10 is directly pushed to move relative to the ablation needle 11), until the base 400 moves to contact with the skin of the human body and is contacted with the skin of the human body, the adhesive layer 420 at the bottom of the base 400 is adhered to the human body, and the positioning of the base 400 is completed; the first pressing part 140 and the second pressing part 330 are released, the ablation needle 11 is clamped by the clamping parts 220 of the elastic claws 201 again, and the axial positioning of the ablation needle 11 is realized, so that the axial and radial positioning of the ablation needle 11 left outside the body is completed, the ablation needle 11 is prevented from moving up and down and swinging left and right, and the accidental injury to a patient caused by the shaking of the ablation needle 11 is avoided. The clamping parts 220 of the elastic claws 201 can be close to each other and far away from each other only by holding or loosening the first pressing part 140 and the second pressing part 330 in the whole process, so that the operation is convenient and quick.
It should be noted that: from the viewpoint of convenient processing and manufacturing, the adjusting member 300, the positioning sleeve 100, the base 400 and the clamping member 200 are preferably made of medical plastics, such as ABS (acrylonitrile butadiene styrene), PP (polypropylene), etc.; the torsion spring 500 may be made of stainless steel or other medical materials.
The positioning device 10 provided by the present embodiment has at least the following advantages:
close to each other through a plurality of elastic claws 201 and press from both sides tight ablation needle 11, avoid ablating the part that needle 11 stayed outside and reciprocate, bond in human outward appearance through base 400, avoid ablating needle 11 and stay the partial horizontal hunting outside, realize ablating the location of 11 each directions of needle, location effect is good, helps improving current ablation needle 11 and inserts the focus after, easily causes the problem of unexpected injury to the patient.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A positioning device, comprising:
the adjusting part is arranged on the base;
the base is used for being fixed on a preset object;
one end of each elastic claw is fixed with the base, the other end of each elastic claw forms a clamping part, a channel for passing through the ablation needle is formed among the clamping parts of the elastic claws, and the adjusting piece is matched with the elastic claws so that the clamping parts of the elastic claws are close to or far away from each other.
2. The positioning device of claim 1, wherein:
the clamping parts of the elastic claws are uniformly distributed around a preset axis.
3. The positioning device of claim 2, wherein:
the positioning device further comprises a positioning sleeve, one end of each elastic claw is connected with the positioning sleeve, and the positioning sleeve is connected with the base and winds the preset axis to rotate relatively.
4. The positioning device of claim 3, wherein:
the base is provided with a first through hole, the positioning sleeve is provided with a clamping part, and the clamping part is movably clamped in the first through hole so as to enable the positioning sleeve and the base to rotate relatively; the joint portion is provided with the second and perforates, the passageway, the second perforates and first perforates communicate in proper order.
5. The positioning device of claim 4, wherein:
the clamping portion comprises a plurality of clamping jaws which are uniformly distributed along the preset axis, the base is provided with a clamping groove communicated with the first through hole, and the clamping jaws are movably buckled in the clamping groove so that the positioning sleeve can rotate relative to the base.
6. The positioning device of claim 5, wherein:
the outer wall of the elastic claw is provided with a first inclined surface, and the adjusting piece is provided with a second inclined surface matched with the first inclined surface; the adjusting piece is in threaded fit with the positioning sleeve, and when the adjusting piece rotates relative to the positioning sleeve, the clamping parts of the elastic claws approach or move away from each other under the matching of the first inclined surface and the second inclined surface.
7. The positioning device of claim 3, wherein:
the outer wall of the positioning sleeve is convexly provided with a first pressing part, the adjusting piece is cylindrical, and the outer wall of the adjusting piece is convexly provided with a second pressing part;
when the first pressing part is close to or far away from the second pressing part, the adjusting piece rotates relative to the positioning sleeve, so that the clamping parts of the elastic claws are mutually far away or close to each other.
8. The positioning device of claim 7, wherein:
the positioning device further comprises an elastic piece which is simultaneously connected with the adjusting piece and the positioning sleeve, so that the clamping parts of the elastic claws have the tendency of moving close to each other.
9. The positioning device of claim 8, wherein:
the elastic piece is a torsion spring;
the torsional spring cover is located the regulating part and between the positioning sleeve, the one end of torsional spring is fixed in the positioning sleeve, the other end of torsional spring is fixed in the regulating part.
10. An ablation device, characterized by:
comprising an ablation needle and a positioning device according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910970170.5A CN110680499B (en) | 2019-10-12 | 2019-10-12 | Positioning device and ablation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910970170.5A CN110680499B (en) | 2019-10-12 | 2019-10-12 | Positioning device and ablation equipment |
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| CN110680499A true CN110680499A (en) | 2020-01-14 |
| CN110680499B CN110680499B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910970170.5A Active CN110680499B (en) | 2019-10-12 | 2019-10-12 | Positioning device and ablation equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113598956A (en) * | 2021-09-30 | 2021-11-05 | 杭州键嘉机器人有限公司 | Orthopedic surgery robot tail end execution device |
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| CN110680499B (en) | 2024-02-09 |
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