CN213283313U - Auxiliary positioning device for ablation needle - Google Patents

Abstract

The utility model relates to a medical treatment auxiliary assembly technical field, concretely relates to melt needle auxiliary positioning device. The specific technical scheme is as follows: an auxiliary positioning device for an ablation needle comprises a supporting plate and telescopic frames fixed on two sides of the supporting plate, wherein supporting columns are symmetrically arranged on the supporting plate, connecting columns are fixed among the supporting columns through bearings, and one ends of the connecting columns extend out of the supporting columns and are fixed with first motors; an ablation needle clamping mechanism is fixed at the middle part of the connecting column, and a through hole for the ablation needle to pass through is formed in the supporting plate; and the clamping mechanism is arranged above the connecting column, the second motor is detachably fixed on the connecting column through a support, a pressing ring is fixed on an output shaft of the second motor through a plurality of connecting strips, and the center of the pressing ring corresponds to the axis of the clamping mechanism. The utility model provides a low and repeated problem of puncture precision among the prior art.

Description

Auxiliary positioning device for ablation needle

Technical Field

The utility model relates to a medical treatment auxiliary assembly technical field, concretely relates to melt needle auxiliary positioning device.

Background

Puncture needles, biopsy needles, ablation needles and the like belong to interventional radiology equipment, and the equipment can enter a human body through penetrating through the skin, so that the purposes of sampling and treatment are achieved. However, in order to improve the accuracy of the interventional radiology equipment puncturing into the human body, under the guidance of imaging medicine (X-ray, ultrasound, CT, MRI), a special instrument is inserted into a diseased region through a percutaneous puncturing path or through an original duct of the human body to perform diagnostic imaging and treatment, or tissue collection, and cytological bacteriological and biochemical examinations are performed. However, the current puncturing work generally adopts a manual positioning method, and the manual positioning needs to depend on factors such as experience of medical staff, so that efficient and accurate puncturing cannot be realized, and puncturing can be performed again due to errors, so that not only is the burden of a patient increased, but also tissue complications of the patient can be caused.

Disclosure of Invention

The utility model provides a to the not enough of prior art, the utility model provides an melt needle auxiliary positioning device has solved the problem of low and repeated puncture of puncture precision among the prior art.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

the utility model discloses an ablation needle auxiliary positioning device, which comprises a support plate and telescopic frames fixed on two sides of the support plate, wherein support columns are symmetrically arranged on the support plate, connecting columns are fixed between the support columns through bearings, and one ends of the connecting columns extend out of the support columns and are fixed with a first motor; an ablation needle clamping mechanism is fixed at the middle part of the connecting column, and a through hole for the ablation needle to pass through is formed in the supporting plate; and the clamping mechanism is arranged above the connecting column, the second motor is detachably fixed on the connecting column through a support, a pressing ring is fixed on an output shaft of the second motor through a plurality of connecting strips, and the center of the pressing ring corresponds to the axis of the clamping mechanism.

Preferably, fixture includes outer sleeve and the inner skleeve that slides and set up in the outer sleeve, set up a plurality of bottom closure, open-top's spout on the inner wall of outer sleeve, on the outer wall of inner skleeve, be close to its top and be provided with the several slider, the slider is arranged in the spout, with spout looks adaptation, the needle setting of melting is in the inner skleeve.

Preferably, an upper top plate and a lower bottom plate which are symmetrical up and down are respectively arranged on the inner wall of the inner sleeve, the upper top plate and the lower bottom plate are fixed through rubber sleeves, the ablation needle is arranged in a cylindrical space surrounded by the rubber sleeves, an inflating nozzle is arranged on the lower bottom plate, and the ablation needle is fixed through the rubber sleeves by inflating a cavity surrounded by the inner sleeve, the upper top plate, the lower bottom plate and the rubber sleeves.

Preferably, a plurality of rubber bulges are arranged on the contact surface of the rubber sleeve and the ablation needle.

Preferably, an annular sheet is fixed on the inner wall of the inner sleeve and above the upper top plate, and when the second motor is started, the pressing ring is in contact with the annular sheet.

Preferably, the annular piece is symmetrically provided with a limiting part, the pressing ring is located between the transverse part of the limiting part and the annular piece, the inner diameter of the pressing ring is greater than or equal to that of the annular piece, and the inner diameter of the annular piece is greater than that of the upper top plate.

Preferably, the bottom of the sliding groove is provided with a cylindrical groove, and a telescopic rod is fixed between the bottom of the cylindrical groove and the sliding block.

Preferably, the bottom of the bracket is fixed with a connecting piece, the connecting piece is fixed with the connecting column through a pin shaft, one side of the connecting column is provided with a limiting pin, and the end part of the limiting pin extending into the connecting column is abutted against the pin shaft.

Preferably, the slider is wedge-shaped and is matched with the sliding groove.

Preferably, the bottom of the telescopic frame is provided with a rubber cover.

The utility model discloses possess following beneficial effect:

the utility model precisely adjusts the angle between the ablation needle on the clamping mechanism and the focus of the patient through the first motor; and then the second motor pushes the inner sleeve arranged in the outer sleeve, so that the ablation needle continuously and stably punctures the ablation needle into the human body at a fixed angle, and finally the ablation needle reaches the focus position of the patient and carries out corresponding operation. Adopt the utility model discloses can be furthest avoid repeated puncture operation, also can realize high-efficient accurate puncture simultaneously, application scope is wide, uses in a flexible way.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a clamping mechanism;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a top view of the outer sleeve (without a stop, as referenced in FIG. 3);

FIG. 5 is a top view of the inner sleeve and its internal structure;

FIG. 6 is a schematic view of a connection structure of the pressure ring and the connecting bar;

in the figure: the device comprises a supporting plate 1, a telescopic frame 2, a supporting column 3, a connecting column 4, a first motor 5, a through hole 6, a support 7, a second motor 8, a connecting strip 9, a pressing ring 10, an outer sleeve 11, an inner sleeve 12, a sliding groove 13, a sliding block 14, an upper top plate 15, a lower bottom plate 16, a rubber sleeve 17, an annular sheet 18, a limiting part 19, a column-shaped groove 20, a telescopic rod 21 and a rubber cover 22.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Unless otherwise indicated, the technical means used in the examples are conventional means well known to those skilled in the art.

Referring to fig. 1-6, the utility model discloses an ablation needle auxiliary positioning device, including backup pad 1 and the expansion bracket 2 of fixing in backup pad 1 both sides, expansion bracket 2 symmetry sets up, can be for locking-type expansion bracket, can adjust backup pad terrain clearance and pin. And in order to increase the stability of the telescopic frame 2 with the ground, the bottom of the telescopic frame 2 is provided with the rubber cover 22, when the auxiliary positioning device is used, the rubber cover 22 sucks the ground by pressing the telescopic frame 2 downwards, and therefore the stability of the telescopic frame 2 is increased. Certainly, in order to facilitate the movement of the auxiliary positioning device, the bottom of the expansion bracket 2 can be provided with a self-locking universal wheel, and the self-locking universal wheel can be arranged according to actual requirements.

The symmetry is provided with support column 3 in backup pad 1, is fixed with spliced pole 4 through the bearing between the support column 3, and the one end of spliced pole 4 stretches out support column 3 and is fixed with first motor 5, and first motor 5 is preferred DC servo motor, can the rotatory angle of accurate control, pins simultaneously, avoids the motor to continue to rotate. An ablation needle clamping mechanism is fixed at the middle part of the connecting column 4, a through hole 6 for the ablation needle to pass through is formed in the supporting plate 1, and the clamping mechanism is located above the through hole 6. The top that is located fixture is provided with and can dismantle the second motor 8 of fixing on spliced pole 4 through support 7, specifically is: the bottom of the bracket 9 is transversely fixed with a connecting piece which is in contact with the connecting column 4, the connecting piece is fixed with the connecting column 4 through a pin shaft, namely, the connecting piece penetrates through the pin shaft to be inserted into the connecting column 4, in order to fix the pin shaft, one side of the connecting column 4 is provided with a limiting pin, and the end part of the limiting pin, which extends into the connecting column 4, is abutted against the pin shaft. The utility model discloses set up round pin axle and spacer pin mainly for the convenience dismantle second motor 8. The pin shaft can be directly changed into a bolt, so that the bracket 9 and the connecting column 4 are fixed without using a limit pin. The specific fixing mode can be selected and set according to actual conditions.

The utility model discloses a preferred linear stepping motor that is of second motor 8 is fixed with clamping ring 10 through several connecting strip 9 on second motor 8's the output shaft, and the center of clamping mechanism is corresponding with clamping ring 10's axle center. The number of the connecting strips 9 is set according to practical conditions, preferably 2-3, and a hose or a cable connected with the end part of the ablation needle penetrates out through a gap between every two adjacent connecting strips 9. Therefore, the number of the connection bars 9 is not excessively large. Moreover, the connecting strip 9 can be vertically arranged with the output shaft of the second motor 8, and can also be obliquely arranged towards the main body of the second motor 8.

The clamping mechanism comprises an outer sleeve 11 and an inner sleeve 12 arranged in the outer sleeve 11 in a sliding manner, and specifically comprises: the inner wall of the outer sleeve 11 is provided with a plurality of sliding grooves 13 with closed bottoms and open tops, namely, the surfaces of the sliding grooves 13 facing the axis of the outer sleeve 11 are open, a plurality of sliding blocks 14 are arranged on the outer wall of the inner sleeve 12 and close to the top of the inner sleeve, the sliding blocks 14 are arranged in the sliding grooves 13 and are matched with the sliding grooves 13, the ablation needle is arranged in the inner sleeve 12, the inner diameter of the inner sleeve 12 is larger than or equal to the outer diameter of the ablation needle, the ablation needle is just clamped in the inner sleeve 12, when the inner diameter of the inner sleeve 12 is larger than the ablation needle, the outer of the ablation needle is selectively wrapped with a layer of rubber. Namely, the number of the sliding blocks 14 is the same as that of the sliding chutes 13, the sliding blocks 14 are in clearance fit with the sliding chutes 13, and the minimum clearance is zero, so that the situation that the ablation needle is deviated or inclined in the process that the inner sleeve 12 moves up and down in the outer sleeve 11 due to the clearance existing between the sliding chutes 13 and the sliding chutes 14 is avoided, the ablation needle is deviated from the original position, the needle tip cannot reach the focus position, and the positioning accuracy is poor. Meanwhile, the shape of the sliding block 14 is set to be wedge-shaped and matched with the sliding groove 13, so that the matching stability of the sliding groove 13 and the sliding block 14 is further increased.

Further, in order to prevent the inner sleeve 12 from sliding in the outer sleeve 11 when the second motor 8 is not activated, a cylindrical groove 20 is formed at the bottom of the sliding groove 13, and a telescopic rod 21 is fixed between the bottom of the cylindrical groove 20 and the sliding block 14 to support the sliding block 14. When the inner sleeve 12 moves towards the bottom of the sliding slot 13, the telescopic rod 12 can be completely compressed into the cylindrical groove 20, thereby avoiding the telescopic rod 12 from occupying a position between the slider 14 and the bottom of the sliding slot 13, resulting in a reduced distance of downward movement of the inner sleeve 12, here in the direction towards the support plate 1.

Furthermore, an upper top plate 15 and a lower bottom plate 16 which are symmetrical up and down are respectively arranged on the inner wall of the inner sleeve 12, the upper top plate 15 and the lower bottom plate 16 are annular with the same shape and size, inner rings of the upper top plate 15 and the lower bottom plate 16 are fixed through a rubber sleeve 17, the rubber sleeve 17 has certain ductility, the ablation needle is arranged in a cylindrical space formed by the rubber sleeve 17 in a surrounding mode, an inflating nozzle is arranged on the lower bottom plate 16, and the ablation needle is fixed through inflating a cavity formed by the inner sleeve 12, the upper top plate 15, the lower bottom plate 16 and the rubber sleeve 17 in the surrounding mode. It should be understood that: because the rubber sleeve 17 has certain ductility, when the cavity enclosed by the rubber sleeve 17 is inflated through the inflation nozzle, the rubber sleeve 17 extends towards the axis of the inner sleeve 12, so that the ablation needle is fixed through extrusion, and ablation needles with different diameters can be fixed. In order to increase the friction force between the rubber sleeve 17 and the ablation needle and make the fixing effect of the rubber sleeve better, a plurality of rubber bulges are arranged on the contact surface of the rubber sleeve 17 and the ablation needle. It should be noted that: in order to avoid the rubber sleeve 17 from having high extensibility after being stressed, the rubber sleeve is protruded out of the inner ring of the upper top plate 15 by a larger distance, so that the fixed ablation needle shakes. Therefore, after the rubber sleeve 17 is stressed, the ring width extending into the inner ring of the upper top plate 15 or the lower bottom plate 16 is within 0.5 cm.

Furthermore, in order to avoid that the pressing ring 10 contacts with the upper top plate 15 when the second motor 8 is started, which may cause the upper top plate 15 to bear too much pressure or cause the upper top plate 15 to be damaged or cause shaking/tilting of the ablation needle after a long time, an annular sheet 18 is fixed on the inner wall of the inner sleeve 12 above the upper top plate 15, and when the second motor 8 is started, the pressing ring 10 contacts with the annular sheet 18, thereby avoiding causing a certain pressure on the upper top plate 15. It should be noted that: the shape of clamping ring 10 and annular piece 18 can carry out conventional setting, can set up like the utility model discloses and circularize, also can directly set up the arc piece, and the shape of this structure is not fixed.

Furthermore, in order to extract the inner sleeve 12 and the ablation needle on the inner sleeve 12 from the human body, the ring-shaped pieces 18 are symmetrically provided with limiting pieces 19, the limiting pieces 19 are 7-shaped, and the two limiting pieces 17 are symmetrically arranged. The pressing ring 10 is located between the transverse portion of the limiting piece 19 and the annular piece 18, the inner diameter of the pressing ring 10 is larger than or equal to that of the annular piece 18, and the inner diameter of the annular piece 18 is larger than that of the upper top plate 15. It should be noted that: when the second motor 8 is installed, the pressing ring 10 only needs to be moved to a position between the ring segment 18 and the limiting member 19 from one side of the two limiting members 19. After the ablation is finished, the second motor 8 moves towards the direction away from the clamping mechanism, so that the pressing ring 10 is in contact with the transverse part of the limiting part 19, and the inner sleeve 12 is reset through the limiting part 19, thereby completing the needle pulling operation. It is also noted that: when the ablation needle is fixed, the tip part of the ablation needle extends out of the inner sleeve 12 (towards the position of the through hole 6) as far as possible, namely, the ablation needle extends out of the top part of the inner sleeve 12 as little as possible, so as not to influence other components connected with the ablation needle.

It should be noted that: because the utility model belongs to medical auxiliary device, consequently, require just higher to the precision, so, require just higher to first motor 5 and second motor 8, for example must not exceed 0.1mm to the distance that second motor 8 (linear stepping motor) will require to go forward at every turn. Moreover, the utility model is not limited to the auxiliary fixation of the ablation needle, but also can be used for puncture needles, biopsy needles, etc., and the second motor 8 is only detached when in use. The puncture needle or biopsy needle fixed on the holding mechanism can also be inserted into the human body manually. In concrete implementation the utility model discloses the time, the usage is more nimble, and medical staff uses according to actual conditions the utility model can. The first motor 5 and the second motor 8 are controlled by a controller in terms of rotation angle and stroke.

When the utility model is used, the auxiliary positioning device is moved to the position above the position where the patient needs to be punctured or operated, and then the expansion bracket 2 is fixed, and the distance between the support plate 1 and the human body is adjusted through the lifting expansion bracket 2. Under the guidance of image medicine, the angle between the ablation needle (or other needles) and the focus position is determined, the connecting column 4 is controlled to rotate through the first motor 5, the ablation needle is adjusted to a proper angle position, and then the first motor 5 is locked to prevent the connecting column 4 from continuously rotating. Then the second motor 8 is started, the press ring 10 is abutted against the annular sheet 18, the inner sleeve 12 is pushed to move towards the focus position of the patient, the stroke of the second motor 8 can be increased in the initial stage, the stroke is reduced when the second motor is close to the focus, the stroke of the second motor 8 is micro-controlled by operating the controller through medical staff, and therefore the ablation needle can accurately reach the focus position and correspondingly eliminate the focus. Adopt the utility model discloses can be furthest avoid repeated puncture operation, also can realize high-efficient accurate puncture simultaneously, application scope is wide, uses in a flexible way.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims (10)

1. The utility model provides an ablation needle auxiliary positioning device, includes backup pad (1) and fixes expansion bracket (2) in backup pad (1) both sides, its characterized in that: the supporting plate (1) is symmetrically provided with supporting columns (3), connecting columns (4) are fixed among the supporting columns (3) through bearings, and one ends of the connecting columns (4) extend out of the supporting columns (3) and are fixed with first motors (5); an ablation needle clamping mechanism is fixed at the connecting column (4) close to the middle part of the connecting column, and a through hole (6) for an ablation needle to pass through is formed in the supporting plate (1); be located fixture's top is provided with and can dismantle through support (7) to be fixed second motor (8) on spliced pole (4), be fixed with clamping ring (10) through several connecting strip (9) on the output shaft of second motor (8), the center of clamping ring (10) with fixture's axle center is corresponding.

2. The ablation needle auxiliary positioning device as claimed in claim 1, wherein: fixture includes outer sleeve (11) and inner skleeve (12) that the slip set up in outer sleeve (11), set up a plurality of bottom closure, open-top's spout (13) on the inner wall of outer sleeve (11), on the outer wall of inner skleeve (12), be provided with several slider (14) near its top, slider (14) are arranged in spout (13), with spout (13) looks adaptation, the needle setting of melting is in inner skleeve (12).

3. The ablation needle auxiliary positioning device as claimed in claim 2, wherein: an upper top plate (15) and a lower bottom plate (16) which are symmetrical up and down are respectively arranged on the inner wall of the inner sleeve (12), the upper top plate (15) and the lower bottom plate (16) are fixed through a rubber sleeve (17), the ablation needle is arranged in a cylindrical space surrounded by the rubber sleeve (17), an inflating nozzle is arranged on the lower bottom plate (16), and the rubber sleeve (17) is used for fixing the ablation needle by inflating the cavity surrounded by the inner sleeve (12), the upper top plate (15), the lower bottom plate (16) and the rubber sleeve (17).

4. The ablation needle auxiliary positioning device as claimed in claim 3, wherein: a plurality of rubber bulges are arranged on the contact surface of the rubber sleeve (17) and the ablation needle.

5. The ablation needle auxiliary positioning device as claimed in claim 3, wherein: and an annular sheet (18) is fixed on the inner wall of the inner sleeve (12) above the upper top plate (15), and when the second motor (8) is started, the pressing ring (10) is in contact with the annular sheet (18).

6. The ablation needle auxiliary positioning device as claimed in claim 5, wherein: the annular piece (18) is provided with a limiting part (19) symmetrically, the pressing ring (10) is located between the transverse part of the limiting part (19) and the annular piece (18), the inner diameter of the pressing ring (10) is larger than or equal to that of the annular piece (18), and the inner diameter of the annular piece (18) is larger than that of the upper top plate (15).

7. The ablation needle auxiliary positioning device as claimed in claim 2, wherein: the bottom of the sliding groove (13) is provided with a cylindrical groove (20), and a telescopic rod (21) is fixed between the bottom of the cylindrical groove (20) and the sliding block (14).

8. The ablation needle auxiliary positioning device as claimed in claim 1, wherein: the connecting piece is fixed to the bottom of the support (7) and fixed to the connecting column (4) through a pin shaft, a limiting pin is arranged on one side of the connecting column (4), and the end portion, extending into the connecting column (4), of the limiting pin abuts against the pin shaft.

9. The ablation needle auxiliary positioning device as claimed in claim 2, wherein: the slide block (14) is wedge-shaped and is matched with the slide groove (13).

10. The ablation needle auxiliary positioning device as claimed in claim 1, wherein: the bottom of the telescopic frame (2) is provided with a rubber cover (22).

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