CN111298278B - Bulb catheter implantation needle source applicator - Google Patents
Bulb catheter implantation needle source applicator Download PDFInfo
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- CN111298278B CN111298278B CN202010242918.2A CN202010242918A CN111298278B CN 111298278 B CN111298278 B CN 111298278B CN 202010242918 A CN202010242918 A CN 202010242918A CN 111298278 B CN111298278 B CN 111298278B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1002—Intraluminal radiation therapy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1007—Arrangements or means for the introduction of sources into the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1014—Intracavitary radiation therapy
- A61N5/1016—Gynaecological radiation therapy
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Abstract
The invention relates to a bulb-head catheter implantation needle applicator, which comprises an implantation needle inserted into the bottom tissue of vagina; the vaginal dilator is provided with an applicator cylinder and a ball head catheter, the front end of the ball head catheter is provided with a positioning ball head, the front end of the applicator cylinder is provided with a positioning hole, the positioning hole is provided with a positioning spherical surface corresponding to the positioning ball head, and the inserting needle is inserted into the bottom tissue of the vagina through the ball head catheter. The invention has the beneficial effects that: the angle of the bulb catheter can be adjusted by adopting the universal applicator cylinder and the bulb catheter, so that the inserting needle can reach a target area in a larger range and obtain better accuracy; the positioning slide block of the rear positioning ring can fix the tail part of the ball head catheter in the whole range of the applicator barrel, and the spherical hoop can lock ball head catheters with various inclination angles; the adoption of the bulb arc-shaped catheter can provide a guiding function for the flexible insertion needle, and can remarkably expand the target area range which can be reached by the insertion needle.
Description
Technical Field
The invention belongs to a radiotherapy apparatus, and particularly relates to a bulb-head catheter implantation needle applicator.
Background
The insertion needle is adopted as a source applicator, so that a radioactive source can directly enter a focal area, the radiation dose of the focal area is improved on the premise of not increasing the damage of surrounding normal tissues, the optimal radiation treatment effect can be theoretically obtained, the insertion needle has no nerve touch at the bottom of a vagina, the effect of micro-invasion, high efficiency and low pain is achieved, the insertion needle becomes a main technical means of the radiation treatment of the cervical cancer, can be used for the radiation treatment of the postoperative stump and can also be used for cancer patients who are not suitable for the operation. The main technical problem faced by the insertion needle radiotherapy is the insertion guiding manner of the insertion needle, the insertion needle needs to be accurately inserted into a target area, namely the front end of the insertion needle needs to be accurately inserted into a dwell point, and the correct insertion direction and insertion depth need to be preset, so that adjacent organs such as rectum, bladder and the like are prevented from being injured. The method adopted at present is to firstly adopt a filling mode to carry out vagina construction to obtain a three-dimensional model of the vagina, then determine the number of the stay points and the positions relative to the vagina model, then adopt a three-dimensional modeling method to obtain a three-dimensional model of the vagina with an insertion needle channel, and then adopt a 3D printing mode to manufacture a vagina insertion needle applicator mould. However, this method can obtain a high-precision mold for an individual patient, but the vaginal modeling process is complex, the efficiency is low, the method is only suitable for a single patient, the method has no universality, and the repeatability of the mold is not completely guaranteed because the correlator of the patient changes at different times, so that one patient may need to make the mold many times. At present, some fixed implantation needle applicators exist, but the applicators all adopt fixed implantation needle guide holes, cannot change the position and cannot obtain a high-precision standing point. In addition, the gynecological radiotherapy has a problem that the straight insertion needle cannot reach the focus deviated from the vaginal part laterally, and sometimes the insertion needle needs to be inserted into the body from the perineum, so that the trauma to the patient is large and the pain is high. Although flexible insertion needles are known for flexible insertion into tissue, their use is greatly limited due to the lack of an adaptable applicator.
Disclosure of Invention
The invention aims to provide a technical scheme of a bulb-head catheter inserting-implanting needle source applicator and improve the application technology of the inserting-implanting needle source applicator.
In order to achieve the purpose, the technical scheme of the invention is as follows: a bulb-head catheter implantation needle applicator comprises an implantation needle inserted into the tissue at the bottom of vagina; the vaginal dilator is provided with an applicator cylinder and a ball head catheter, the front end of the ball head catheter is provided with a positioning ball head, the front end of the applicator cylinder is provided with a positioning hole, the positioning hole is provided with a positioning spherical surface corresponding to the positioning ball head, and the inserting needle is inserted into the bottom tissue of the vagina through the ball head catheter.
Furthermore, in order to realize good positioning and orientation of the bulb catheter, the rear end of the applicator barrel is provided with a rear positioning ring, the rear positioning ring is provided with a positioning guide plate, a positioning slide block is arranged on the positioning guide plate and moves along the positioning guide plate, the positioning slide block is provided with a rear positioning hole, a spherical hoop is arranged in the rear positioning hole, and the rear end of the bulb catheter passes through the rear positioning hole through the spherical hoop.
Furthermore, in order to stably realize the positioning of the rear end of the bulb conduit and improve the adjustment range, the positioning slide block is provided with a sliding groove, the spherical hoop is arranged between the positioning slide block and the positioning guide plate, a spherical gasket is arranged between the spherical hoop and the positioning guide plate, the sliding groove of the positioning slide block slides along the positioning guide plate, the positioning slide block is provided with a set screw, the set screw is used for jacking the positioning guide plate, so that the positioning slide block fixes the bulb conduit on the rear positioning ring through the spherical hoop and the spherical gasket, the positioning guide plate is provided with a radial scale for indicating the position of the positioning slide block, and the moving path of the center of the spherical hoop passes through the axis of the applicator barrel.
Furthermore, in order to improve the positioning accuracy of the rear end of the bulb-shaped guide tube, a step hole is formed in the rear end of the applicator cylinder, a step shaft which is matched with the step hole in a rotating mode is arranged on the rear positioning ring, circumferential scales which indicate the rotating angle of the rear positioning ring are arranged on the bottom surface of the step hole, rear threads are arranged at the rear end of the applicator cylinder, the rear positioning ring is fixed at the rear end of the applicator cylinder through a rear locking ring, the rear locking ring is connected with the rear threads of the applicator cylinder, and the rear positioning ring is tightly pressed at the rear end of the applicator cylinder through the rear locking ring.
Furthermore, in order to enlarge the target area range which can be reached by the inserting and implanting needle, the ball head catheter comprises a ball head straight catheter and a ball head arc catheter, the inserting and implanting needle comprises a straight inserting and implanting needle and a flexible inserting and implanting needle, the arc angle of the ball head arc catheter is not more than 45 degrees, and the arc radius of the axis of the ball head arc catheter is not less than 30 mm.
Further, as a set of preferred bulb arc conduit combinations, the bulb arc conduits include bulb arc conduits having arc angles of 10 °, 18 °, 25 °, 35 °, and 45 °, and the arc radius of the bulb arc conduits is 40 mm.
Furthermore, the structural size of the applicator with better universality is that the diameter of the positioning spherical surface of the positioning hole is 4mm, the outer diameter of the applicator cylinder is 25mm, 19 positioning holes are arranged at the front end of the applicator cylinder, the positioning hole comprises 18 first surrounding positioning holes of a central positioning hole, the positioning spherical surface of the central positioning hole is arranged on the axis of the applicator cylinder, the first surrounding positioning holes are circumferentially distributed around the axis of the applicator cylinder, and the distance between every two adjacent positioning holes is 4.0 mm.
Furthermore, the diameter of the positioning spherical surface of the positioning hole is 4mm, the outer diameter of the applicator cylinder is 30mm, 19 positioning holes are arranged at the front end of the applicator cylinder, the positioning hole comprises a central positioning hole and 18 second surrounding positioning holes, the positioning spherical surface of the central positioning hole is arranged on the axis of the applicator cylinder, the second surrounding positioning holes are circumferentially distributed around the axis of the applicator cylinder, and the distance between every two adjacent positioning holes is 5.25 mm.
Furthermore, the diameter of the positioning spherical surface of the positioning hole is 4mm, the outer diameter of the applicator cylinder is 20mm, 9 positioning holes are arranged at the front end of the applicator cylinder, the positioning holes comprise a central positioning hole and 8 third surrounding positioning holes which are distributed around the applicator cylinder in an equal distribution mode, the positioning spherical surface of the central positioning hole is arranged on the axis of the applicator cylinder, and the distance between the positioning spherical surface of the third surrounding positioning hole and the axis of the applicator cylinder is 5.5 mm.
The invention has the beneficial effects that: the universal applicator cylinder and the bulb catheter are adopted, the bulb at the front end of the bulb catheter is matched with the positioning spherical surface of the applicator cylinder, and the angle of the bulb catheter can be adjusted, so that the inserting needle can reach a target area in a larger range, and better accuracy is obtained; the positioning slide block of the rear positioning ring can fix the tail part of the ball head catheter in the whole range of the applicator barrel, and the spherical hoop can lock ball head catheters with various inclination angles; the adoption of the bulb arc catheter can provide a guiding function for the flexible insertion needle, can remarkably expand the target area range which can be reached by the insertion needle, can steplessly adjust the position of a staying point in the target area range, can replace part of operations for inserting the insertion needle from the perineum, and realizes minimally invasive treatment.
The invention is described in detail below with reference to the figures and examples.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a cross-sectional view of the structure of the present invention;
FIG. 4 is an exploded view of the positioning block of the present invention;
FIG. 5 is a block diagram of the present invention employing a bulb-shaped catheter;
FIG. 6 is a view of the structure of the bulb-shaped arc catheter of the present invention;
FIG. 7 is a locating hole structure of the present invention employing a 25mm diameter applicator barrel;
FIG. 8 is a schematic view of the application of the insertion needle of the present invention when a straight catheter with a ball head is used;
FIG. 9 is a schematic view of the application of the insertion needle of the present invention when a bulb-shaped arc catheter is used;
FIG. 10 is a locating hole structure of the present invention employing a 30mm diameter applicator barrel;
FIG. 11 is a locating hole structure of the present invention employing a 20mm diameter applicator barrel;
fig. 12 is a schematic diagram of an application of the present invention.
Detailed Description
A bulb-head catheter implantation needle applicator comprises an implantation needle 10 inserted into the tissue at the bottom of vagina; the vaginal dilator is provided with an applicator cylinder 20 and a ball head catheter 30, the front end of the applicator cylinder extends into the vagina, the front end of the ball head catheter is provided with a positioning ball head 31, the front end of the applicator cylinder is provided with a positioning hole 21, the positioning hole is provided with a positioning spherical surface 22 corresponding to the positioning ball head, and the inserting needle is inserted into the bottom tissue of the vagina through the ball head catheter.
The rear end of the applicator barrel is provided with a rear positioning ring 40, the rear positioning ring is provided with a positioning guide plate 41, the positioning guide plate is provided with a positioning slide block 50, the positioning slide block moves along the positioning guide plate, the positioning slide block is provided with a rear positioning hole 51, a spherical hoop 52 is arranged in the rear positioning hole, and the rear end of the bulb guide pipe passes through the spherical hoop and penetrates through the rear positioning hole.
The utility model discloses a ball head pipe, including source applicator barrel, location slider, sphere clamp, ball head clamp and back positioning guide, location slider is equipped with spout 53, the sphere clamp sets up location slider with between the location baffle, the sphere clamp with be equipped with spherical gasket 54 between the location baffle, the spout of location slider is followed the location baffle slides, the location slider is equipped with holding screw 55, the holding screw roof pressure location baffle makes the location slider passes through sphere clamp and sphere gasket will the ball head pipe is fixed on the back holding ring, the location baffle is equipped with the instruction radial scale 42 of location slider position, the moving path at sphere clamp center passes through the axis of source applicator barrel
The rear end of the applicator barrel is provided with a step hole 23, the rear positioning ring is provided with a step shaft 43 which is matched with the step hole in a rotating way, the bottom surface of the step hole is provided with a circumferential scale 24 for indicating the rotating angle of the rear positioning ring, the rear end of the applicator barrel is provided with a rear thread 25, the rear positioning ring is fixed at the rear end of the applicator barrel through a rear locking ring 60, the rear locking ring is connected with the rear thread of the applicator barrel, and the rear positioning ring is tightly pressed at the rear end of the applicator barrel through the rear locking ring.
As shown in fig. 5 and 6, the bulb-shaped catheter comprises a bulb-shaped straight catheter 30 and a bulb-shaped arc catheter 32, the inserting needle comprises a straight inserting needle 10 and a flexible inserting needle 11, the arc angle alpha of the bulb-shaped arc catheter is not more than 45 degrees, and the arc radius R of the axis of the bulb-shaped arc catheter is not less than 30 mm.
As a group of preferred bulb arc-shaped conduit structures, the bulb arc-shaped conduit comprises bulb arc-shaped conduits with arc angles of 10 degrees, 18 degrees, 25 degrees, 35 degrees and 45 degrees, and the arc radius of the bulb arc-shaped conduits is 40 mm.
The structure of an applicator cylinder is as follows: the diameter d1 of the positioning spherical surface of the positioning hole is 4mm, the outer diameter d of the applicator cylinder is 25mm, 19 positioning holes are arranged at the front end of the applicator cylinder, each positioning hole comprises a central positioning hole 21a and 18 first surrounding positioning holes 21b, the positioning spherical surface of the central positioning hole is arranged on the axis of the applicator cylinder, the first surrounding positioning holes are circumferentially distributed around the axis of the applicator cylinder, and the distance S1 between every two adjacent positioning holes is 4.0 mm.
One configuration of a larger applicator cartridge is: the diameter d1 of the positioning spherical surface of the positioning hole is 4mm, the outer diameter d of the applicator cylinder is 30mm, 19 positioning holes are arranged at the front end of the applicator cylinder, the positioning holes comprise a central positioning hole 21a and 18 second surrounding positioning holes 21c, the positioning spherical surface of the central positioning hole is arranged on the axis of the applicator cylinder, the second surrounding positioning holes are circumferentially distributed around the axis of the applicator cylinder, and the distance S2 between every two adjacent positioning holes is 5.25 mm.
A smaller applicator cartridge is constructed by: the diameter of the positioning spherical surface of the positioning hole is 4mm, the outer diameter d of the applicator cylinder is 20mm, 9 positioning holes are arranged at the front end of the applicator cylinder, each positioning hole comprises a central positioning hole 21a and 8 third surrounding positioning holes 21d which are distributed around the applicator cylinder in an equal distribution mode, the positioning spherical surface of the central positioning hole is arranged on the axis of the applicator cylinder, and the distance S3 between the positioning spherical surface of the third surrounding positioning hole and the axis of the applicator cylinder is 5.5 mm.
The first embodiment is as follows:
referring to fig. 1 to 7, a ball-headed catheter implantation needle applicator comprises an implantation needle 10 inserted into the tissue of the vaginal bottom, an applicator cylinder 20 and a ball-headed catheter 30.
The front end of the applicator cylinder 20 extends into the vagina, the inserting needle 10 passes through the bulb catheter and extends out of the front end of the applicator cylinder to reach a radiotherapy residence point, and the center of the inserting needle is provided with a guide hole for providing a passage for a radioactive source so that the radioactive source reaches the front end of the inserting needle.
The applicator barrel 20 is a hollow cylinder, and the front end of the applicator barrel is provided with a positioning hole 21. The position and the number of the positioning holes are reasonably arranged, and the application effect of the applicator is greatly influenced. The outer diameters of the insertion needles commonly used at present are 1.9mm and 2.1 mm.
In this embodiment, the outer diameter d of the applicator cylinder is 25mm, and the outer diameter of the most commonly used vaginal applicator at present is 25mm, so that the vaginal applicator can be suitable for most patients and has better application effect and tolerance. The aperture D2=23mm at the rear end of the applicator barrel, and the length L =100mm of the applicator barrel. The front end of the applicator cylinder is provided with positioning holes, in order to enable the inserting and implanting needle to reach a target area in a larger range and a maximum staying point, the positioning holes need to be arranged as many as possible, the embodiment adopts a mode of densely arranging the positioning holes at the front end of the applicator cylinder, and the front end of the applicator cylinder is provided with 19 positioning holes. The 19 positioning holes comprise a central positioning hole 21a and 18 first surrounding positioning holes 21b, the positioning spherical surface of the central positioning hole is arranged on the axis of the applicator cylinder, the 18 first surrounding positioning holes are circumferentially distributed around the axis of the applicator cylinder, and the distance S1 between every two adjacent positioning holes is 4.0 mm. The positioning hole is provided with a positioning spherical surface 22 on the inner side surface of the applicator barrel, and the diameter D1 of the positioning spherical surface is 4 mm.
The front end of the bulb catheter 30 is provided with a positioning bulb 31, the diameter d =4mm of the positioning bulb corresponds to the positioning spherical surface 22 of the applicator cylinder, the front end of the bulb catheter is matched with the spherical surface of the applicator cylinder, the inclination angle of the bulb catheter can be adjusted, and therefore the optimal insertion guide is obtained for the insertion needle, and the insertion needle is inserted into the bottom tissue of the vagina through the bulb catheter to reach a radiotherapy staying point.
The bulb-shaped catheter comprises a bulb-shaped straight catheter 30 and a bulb-shaped arc catheter 32, and the inserting and planting needle also comprises a straight inserting and planting needle 10 and a flexible inserting and planting needle 11. The straight insertion needle is made of rigid metal and penetrates into the ball head straight catheter 30. The flexible insertion needle is made of elastic plastic materials and can be bent to a certain degree, and the flexible insertion needle penetrates into the ball head arc-shaped catheter 32. In order to adapt to the bending curvature of the flexible implanting needle and ensure that the flexible implanting needle smoothly passes through the ball head arc-shaped catheter, according to medical practice experience, an arc angle alpha of the ball head arc-shaped catheter is not more than 45 degrees, and an arc radius R of the axis of the ball head arc-shaped catheter is not less than 30 mm. In this embodiment, the arc radius R =40mm of the bulb arc conduit is configured with five bulb arc conduits, and the arc angles α of the five bulb arc conduits are 10 °, 18 °, 25 °, 35 °, and 45 °, respectively. The front end of the bulb arc-shaped guide pipe is provided with a straight guide section 33. Under the condition of meeting the requirement of reaching a staying point, the inserting needle can be smoothly inserted by adopting the ball head straight conduit or the ball head arc conduit with a smaller arc angle, and the ball head arc conduit with a larger arc angle can obtain a larger target area range.
As shown in fig. 8, the ball-head straight catheter 30 is adopted, and when the ball-head catheter rotates to adjust the extending angle, the front end of the inserting needle can expand the reaching range. According to the treatment cases of years, the length of the insertion needle extending out of the front end of the applicator cylinder is usually between 10mm and 30 mm. The ball head straight catheter and the straight implanting needle are adopted, in an area which is away from the front end E1 of the applicator barrel by =10mm, 19 areas which can be reached by the implanting needle through 19 positioning holes are A1, and the space B1 between two adjacent A1 areas is not more than 2.6 mm. Compared with the inserting needle with the inserting distance of 4mm along the axial direction of the applicator cylinder, the interval which can not be reached by the inserting needle is reduced by 35 percent (1.4/4.0). The maximum distance L1 between the implantation needle and the center of the applicator cylinder is 10mm, which is 25% longer than the insertion distance of the implantation needle along the axial direction of the applicator cylinder. In the area E1=10mm away from the front end of the applicator barrel, 19 areas which can be reached by the inserting needle through 19 positioning holes are A2, 19A 2 areas are overlapped and jointed with each other, a dead zone which can not be reached by the inserting needle does not exist in the boundary of the whole area, and the front end of the inserting needle can reach any position. The maximum distance L2 between the implantation needle and the center of the applicator cylinder is 13.4mm, which is 67% larger than the insertion distance of the implantation needle along the axial direction of the applicator cylinder.
As shown in fig. 9, five ball-head arc catheters 32 (arc angles α are respectively 10 °, 18 °, 25 °, 35 ° and 45 °) are adopted, in the region of E1=10mm from the front end of the applicator cylinder, the reachable sections of the flexible implanting needle along the five ball-head arc catheters in the radial direction of the applicator cylinder are respectively P1, P2, P3, P4 and P5, the five reachable sections are overlapped and jointed with each other, and the front end of the implanting needle can reach any position. The maximum distance L3 between the implantation needle and the center of the applicator cylinder is 20.4mm, which is 155% larger than the insertion distance of the implantation needle along the axial direction of the applicator cylinder.
In order to fix the position of the bulb catheter and ensure that the implanting needle accurately and stably extends out of the bulb catheter, the bulb catheter needs to be positioned and fixed at the rear end of the applicator cylinder. Because a plurality of insertion needles are required to be inserted in radiotherapy, the rear end fixing device is small as possible, and a larger space for the insertion needles to pass through is reserved.
The rear end of the applicator barrel is provided with a rear positioning ring 40, the rear positioning ring is provided with a positioning guide plate 41, and the positioning guide plate stretches across the rear positioning ring and extends out of the rear positioning ring towards the outer side. The positioning guide plate is provided with radial scales 42. The underside of the rear positioning ring is provided with a step shaft 43, the rear positioning ring is provided with a corner indicating opening 44, and a corner pointer 45 is arranged at the corner indicating opening.
The positioning guide plate is provided with a positioning slide block 50 which moves along the positioning guide plate 41. The positioning slide block is provided with a rear positioning hole 51, a positioning spherical surface 56 is arranged in the positioning hole, the positioning slide block is provided with a sliding groove 53 communicated with the rear positioning hole, and the sliding groove 53 straddles on the positioning guide plate 41. The rear positioning hole is provided with a spherical hoop 52 which is provided with a slot 57, the spherical hoop is arranged in the sliding groove 53 and positioned between the positioning slide block and the positioning guide plate 41, and the spherical surface of the spherical hoop is matched with a positioning spherical surface 56 of the positioning slide block. A spherical gasket 54 is arranged between the spherical hoop and the positioning guide plate, and the spherical gasket is provided with a spherical surface 58 matched with the spherical hoop.
The rear end of the bulb guide tube passes through the rear positioning hole 51 through the spherical clamp 52, which allows the bulb guide tube to pass through the rear positioning hole 51 at an oblique angle. The positioning slide block is provided with a set screw 55 which pushes against the positioning guide plate 41, so that the positioning slide block presses the spherical hoop and the spherical gasket on the positioning guide plate 41 to fix the bulb catheter on the rear positioning ring.
The rear end of the applicator barrel is provided with a step hole 23, a step shaft 43 of the rear positioning ring is in running fit with the step hole 23, and the bottom surface of the step hole is provided with a circumferential scale 24 for indicating the rotation angle of the rear positioning ring. The rear end of the applicator cylinder is provided with a rear thread 25, a rear positioning ring is fixed at the rear end of the applicator cylinder through a rear locking ring 60, the rear locking ring is connected with the rear thread of the applicator cylinder, and the rear positioning ring is tightly pressed at the rear end of the applicator cylinder by the rear locking ring.
During the sliding stroke of the sliding chute of the positioning sliding block along the positioning guide plate, the moving path of the center of the spherical hoop passes through the axis of the applicator cylinder, namely the center of the spherical hoop passes through the center of the applicator cylinder along the diameter, and the rear positioning ring 40 can rotate at the rear end of the applicator cylinder by an angle, so that the center of the spherical hoop can be adjusted to any position of the rear end of the applicator cylinder, and the most favorable condition is provided for the adjustment of the inclination angle of the bulb-head catheter. The radial scale 42 of the positioning guide plate can indicate the radial displacement of the rear end of the bulb-shaped guide pipe, and the circumferential scale 24 of the bottom surface of the stepped hole indicates the angular displacement of the rear end of the bulb-shaped guide pipe.
When the bulb-head catheter implantation needle applicator is used for radiotherapy, the applicator cylinder is inserted into a vagina and is in a stable position, the relative position of the applicator cylinder and radiotherapy staying points is obtained through medical images (such as CT), and the relative position of each radiotherapy staying point and the closest positioning hole is determined. And then calculating the insertion angle and the insertion depth according to the position relation between the radiotherapy resident point and the positioning hole, determining the type of the adopted ball head catheter (a ball head straight catheter or a ball head arc catheter with a specific arc angle), and selecting a straight insertion needle or a flexible insertion needle according to the type of the ball head catheter. The adopted bulb guide pipe extends into the applicator barrel, a positioning bulb at the front end of the bulb guide pipe is in running fit with the positioning spherical surface of the selected positioning hole, and the rear end of the bulb guide pipe penetrates through the positioning slide block. The bulb-shaped catheter is rotated to be adjusted to a required insertion angle, the circumferential scale at the rear end of the applicator cylinder and the radial scale of the rear positioning ring can help the bulb-shaped catheter to obtain an accurate position, and if the bulb-shaped catheter is adopted, the self-transmission position, namely the arc-shaped bending direction, needs to be adjusted. After the position of the bulb guide pipe is adjusted, the position of the bulb guide pipe is fixed through the positioning sliding block. Then the adopted inserting needle penetrates into the bulb catheter from the rear end of the bulb catheter, extends out from the front end of the bulb catheter, is inserted into human tissues and reaches a residence point.
After the insertion operation of one transplanting needle is completed, the bulb catheter is taken out from the rear end of the applicator cylinder, and then the insertion operation of the next transplanting needle is carried out. The inserted inserting needle can penetrate out of the open space of the rear positioning ring, and the positioning guide plate and the positioning slide block of the rear positioning ring are small in structure, so that the inserting needle can pass through the large space, and the rear end of the inserted inserting needle can be moved properly, so that conditions can be provided for the insertion of the subsequent inserting needle.
FIG. 12 illustrates the insertion of the introducer needle 10 into the focal zone 71 using a ball-nose catheter introducer needle applicator. In the anatomical structure illustrated in fig. 12, the vagina 72, uterus 73, bladder 74 and rectum 75 are included.
Because the front end of the applicator barrel is densely provided with a plurality of positioning holes, the ball head guide pipe is aligned with the selected positioning holes, and certain operation skill and operation experience are required. A better method is that another same applicator cylinder is adopted as a preset applicator cylinder, a bulb-shaped catheter is correctly arranged in the preset applicator cylinder in vitro, and the bulb-shaped catheter is fixed on a rear positioning ring. Then the rear positioning ring is taken down together with the bulb catheter, the mounted positioning ring is placed in the applicator cylinder inserted into the vagina at the position on the preset applicator cylinder, and then the rear positioning ring is fixed at the rear end of the applicator cylinder by the rear locking ring, so that the bulb catheter can be more conveniently and accurately arranged on the set positioning hole.
Example two:
referring to fig. 10, a ball-headed catheter implantation needle applicator. This embodiment is another applicator cartridge configuration of the first embodiment. Example an applicator barrel with an outer diameter of 25mm may be suitable for most patients, but for some patients who are more tolerant of larger diameter applicator barrels and require insertion needles to reach a larger range of target areas, the use of larger diameter applicator barrels may be more beneficial for treatment.
In this embodiment, an applicator cartridge with a larger diameter is used. The outer diameter d of the applicator cylinder is 30mm, the aperture of the rear end of the applicator cylinder is 28mm, and the length L =120mm of the applicator cylinder. 19 positioning holes are formed in the front end of the applicator barrel, the diameter d1 of a positioning spherical surface of each positioning hole is 4mm, each positioning hole comprises a central positioning hole 21a and 18 second surrounding positioning holes 21c, the positioning spherical surface of each central positioning hole is arranged on the axis of the applicator barrel, the second surrounding positioning holes are circumferentially distributed around the axis of the applicator barrel, and the distance S2 between every two adjacent positioning holes is 5.25 mm.
Similar to the first embodiment, in this embodiment, five bulb arc catheters 32 are used, and the maximum distance L3 from the center of the applicator barrel that the flexible insertion needle can reach is 25.4mm in the area 10mm from the front end of the applicator barrel.
Example three:
fig. 11 shows a ball-headed catheter implantation needle applicator. This embodiment is another applicator cartridge configuration of the first embodiment. Example an applicator barrel having an outer diameter of 25mm may be suitable for most patients, but is poorly tolerated in some patients with narrower vaginas, requiring a smaller diameter applicator barrel.
In this embodiment, an applicator cartridge having a smaller diameter is used. The outer diameter d of the applicator cylinder is 20mm, the aperture of the rear end of the applicator cylinder is 18mm, and the length L =100mm of the applicator cylinder. The front end of the applicator cylinder is provided with 9 positioning holes, the diameter d1 of the positioning spherical surface of each positioning hole is 4mm, each positioning hole comprises a central positioning hole 21a and 8 third surrounding positioning holes 21d which are equally distributed around the applicator cylinder, the positioning spherical surface of each central positioning hole is arranged on the axis of the applicator cylinder, the distance S3 between the positioning spherical surface of each third surrounding positioning hole and the axis of the applicator cylinder is 5.5mm, and the distance S4 between every two adjacent third surrounding positioning holes is 4.2 mm.
Because the outer diameter of the applicator cylinder is smaller, 18 surrounding positioning holes like the first embodiment cannot be arranged in a circumferential surrounding distribution mode, and 8 third surrounding positioning holes are arranged as much as possible in the first embodiment, so that the insertion requirements of more insertion needles are met.
Similar to the first embodiment, in the present embodiment, since the inner diameter of the applicator cylinder is smaller, the ball-head arc conduit with the arc angle of 45 ° cannot be used, and the ball-head arc conduit with the arc angle of 35 ° is adopted, and in the region 10mm away from the front end of the applicator cylinder, the maximum distance L3 which can be reached by the flexible insertion needle and is away from the center of the applicator cylinder is 13.5 mm.
Claims (7)
1. A bulb-head catheter implantation needle applicator comprises an implantation needle inserted into the tissue at the bottom of vagina; the device is characterized by comprising an applicator cylinder and a ball head catheter, wherein the front end of the applicator cylinder extends into the vagina, the front end of the ball head catheter is provided with a positioning ball head, the front end of the applicator cylinder is provided with a positioning hole, the positioning hole is provided with a positioning spherical surface corresponding to the positioning ball head, and the inserting needle is inserted into the bottom tissue of the vagina through the ball head catheter; the rear end of the applicator barrel is provided with a rear positioning ring which rotates at the rear end of the applicator barrel, the rear positioning ring is provided with a positioning guide plate, the positioning guide plate is provided with a positioning slide block, the positioning slide block moves along the positioning guide plate, the positioning slide block is provided with a rear positioning hole, a spherical hoop is arranged in the rear positioning hole, and the rear end of the bulb guide pipe penetrates through the rear positioning hole through the spherical hoop;
the utility model discloses a ball head pipe, including location slider, sphere clamp, ball head pipe, back holding ring, location slider, sphere clamp, location slider, location baffle, location slider is equipped with the spout, the setting of sphere clamp is in location slider with between the location baffle, the sphere clamp with be equipped with the sphere gasket between the location baffle, the spout of location slider is followed the location baffle slides, the location slider is equipped with holding screw, holding screw roof pressure location baffle makes the location slider passes through sphere clamp and sphere gasket will the bulb pipe is fixed on the back holding ring, the location baffle is equipped with the instruction the radial scale of location slider position, the moving path at sphere clamp center passes through the axis of applicator section of thick bamboo.
2. The ball-headed catheter inserting needle applicator according to claim 1, wherein the rear end of the applicator cylinder is provided with a stepped hole, the rear positioning ring is provided with a stepped shaft rotatably fitted to the stepped hole, the bottom surface of the stepped hole is provided with a circumferential scale indicating the rotation angle of the rear positioning ring, the rear end of the applicator cylinder is provided with a rear thread, the rear positioning ring is fixed to the rear end of the applicator cylinder by a rear locking ring, the rear locking ring is connected with the rear thread of the applicator cylinder, and the rear locking ring presses the rear positioning ring against the rear end of the applicator cylinder.
3. The ball-head catheter implantation needle applicator according to claim 1, wherein the ball-head catheter comprises a ball-head straight catheter and a ball-head arc catheter, the implantation needle comprises a straight implantation needle and a flexible implantation needle, an arc angle of the ball-head arc catheter is not more than 45 degrees, and an arc radius of an axis of the ball-head arc catheter is not less than 30 mm.
4. The ball-headed catheter implantation needle applicator of claim 3, wherein the ball-headed arc catheter comprises a ball-headed arc catheter with an arc angle of 10 °, 18 °, 25 °, 35 ° or 45 °, the arc radius of the ball-headed arc catheter being 40 mm.
5. The ball-headed catheter implantation needle applicator of claim 1, wherein the positioning holes have a positioning spherical surface diameter of 4mm, the applicator barrel has an outer diameter of 25mm, 19 positioning holes are provided at the front end of the applicator barrel, the positioning holes comprise a central positioning hole 18 first surrounding positioning holes, the positioning spherical surface of the central positioning hole is on the axis of the applicator barrel, the first surrounding positioning holes are circumferentially distributed around the axis of the applicator barrel, and the distance between adjacent positioning holes is 4.0 mm.
6. The ball-nose catheter implantation needle applicator of claim 1, wherein the positioning holes have a spherical positioning surface with a diameter of 4mm, the applicator barrel has an outer diameter of 30mm, 19 positioning holes are provided at the front end of the applicator barrel, the positioning holes comprise a central positioning hole and 18 second surrounding positioning holes, the spherical positioning surface of the central positioning hole is on the axis of the applicator barrel, the second surrounding positioning holes are circumferentially distributed around the axis of the applicator barrel, and the distance between adjacent positioning holes is 5.25 mm.
7. The ball-nose catheter implantation needle applicator of claim 1, wherein the positioning hole has a spherical positioning surface with a diameter of 4mm, the applicator barrel has an outer diameter of 20mm, the front end of the applicator barrel is provided with 9 positioning holes, the positioning holes comprise a central positioning hole and 8 third surrounding positioning holes equally distributed around the applicator barrel, the spherical positioning surface of the central positioning hole is on the axis of the applicator barrel, and the distance between the spherical positioning surface of the third surrounding positioning hole and the axis of the applicator barrel is 5.5 mm.
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| CN202010242918.2A CN111298278B (en) | 2020-03-31 | 2020-03-31 | Bulb catheter implantation needle source applicator |
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| CN202010242918.2A CN111298278B (en) | 2020-03-31 | 2020-03-31 | Bulb catheter implantation needle source applicator |
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| CN111298278B true CN111298278B (en) | 2022-03-01 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112043977B (en) * | 2020-09-30 | 2022-07-15 | 河南科技大学第一附属医院 | Source applying device for radiation therapy of anal canal cancer and perianal cancer |
| CN113018706B (en) * | 2021-03-22 | 2022-07-26 | 广州富瑞价值医疗健康产业有限公司 | Treatment needle of multichannel vagina afterloading treatment device and fixing method of treatment tube |
| CN114209993B (en) * | 2021-12-07 | 2023-07-11 | 中国人民解放军空军军医大学 | Gynaecology and obstetrics intracavity radiotherapy is exempted from to fill and is used source ware |
| CN117159900B (en) * | 2023-10-10 | 2024-02-02 | 中国医学科学院北京协和医院 | Bending catheter for inserting and implanting needle for radiotherapy |
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