Source application combined device for cervical cancer brachytherapy

Abstract

The utility model discloses a source application combination device for cervical cancer brachytherapy, and particularly relates to the technical field of medical instruments, the source application combination device comprises an outer sleeve, an inner cylinder frame, an insertion strip, a vaginal orifice fixing piece and an insertion needle, the vaginal orifice fixing piece is sleeved on the outer surface of the outer sleeve, the outer sleeve is sleeved on the outer surface of the inner cylinder frame, and the insertion strip is inserted into the insertion needle. Inserting strip channels corresponding to the inserting strips are formed in the inner cylinder frame, and the inserting strips are inserted into the corresponding inserting strip channels. The insertion strip comprises a treatment insertion strip and a protection lead strip, and the insertion needle is inserted into the treatment insertion strip; a limiting mechanism is arranged between the inserting strip and the inner cylinder frame, and a fixing mechanism is arranged between the implanting needle and the treatment inserting strip. According to the utility model, the outer sleeve and the inner sleeve frame are arranged, and the shape of the end part is utilized, so that the device is better attached to the vagina postoperative stump, and the local treatment advantage of close-range radiotherapy can be better exerted; a transparent material is utilized to realize accurate implantation of the implantation needle, the treatment insertion strip and the protection lead strip; and various treatment requirements of patients are met.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more specifically, the utility model relates to a source applicator combination device for intracavitary radiotherapy of cervical cancer. Background Technique

[0002] It is known that intracavitary radiotherapy is an indispensable tumor local boost radiotherapy technique for the treatment of middle and advanced cervical cancer at present, and has irreplaceable treatment advantages; for example: the vaginal stump after surgery is a common recurrence site after radical resection of cervical cancer. For patients with recurrence at the vaginal stump after surgery, there is currently no very effective treatment method. In most cases, it is impossible to perform surgical resection when discovered. Therefore, for stage I and IIa endometrial cancer and cervical cancer patients without fertility requirements, they need to receive intracavitary radiotherapy at the vaginal stump after radical resection to improve the local tumor control rate; in clinical practice, many patients with recurrence on the lateral vaginal wall cannot achieve effective local treatment through external radiotherapy techniques; thus, it can be seen that local intracavitary radiotherapy of the vagina is an ideal treatment method for local irradiation, which is more conducive to protecting critical organs and preventing serious complications.

[0003] Among them, due to the certain thickness at the suture of the vaginal stump after radical resection, and it mostly presents a "ram's horn" shape, that is, the left - right diameter is longer than the anteroposterior diameter, and both sides are concave inward; while the conventional intracavitary radiotherapy vaginal source applicator is cylindrical, with a closed top and a certain thickness, and only a single - tube source applicator channel is provided at the center position inside the cylinder. Thus, the main disadvantages of this single structure are as follows: 1. The existing source applicator head cannot fit closely with the actual stump shape, resulting in the recurrence position not being fully irradiated; 2. There is a certain thickness at the top, and the dose drops steeply around the radioactive source during brachytherapy, which is likely to cause insufficient dose deposition at the stump; 3. Dependent on the central single - tube source supply, the formed cylindrical dose curve has poor adjustability, and it is difficult to meet the irradiation requirements of local eccentric lesions on the vaginal wall under the safe dose limits of the rectum and bladder; 4. The existing vaginal source application channel is implanted as a whole, and the implantation effect cannot be observed with the naked eye after implantation; 5. The existing central source tube source applicator is prone to displacement during transportation; and if a 3D - printed vaginal source applicator is used, although it meets the individual treatment requirements of patients, it is expensive, has a long production cycle, and is basically not covered by local medical insurance, making it difficult to popularize.

[0004] Therefore, in order to meet the special needs of intracavitary radiotherapy of the vaginal stump after surgery, a source applicator combination device for intracavitary radiotherapy of cervical cancer is proposed as a further improvement to improve the treatment effect of intracavitary radiotherapy of the vaginal stump after surgery. Content of the Utility Model

[0005] In order to overcome the above - mentioned defects of the prior art, an embodiment of the utility model provides a source applicator combination device for intracavitary radiotherapy of cervical cancer to solve the problems raised in the above - mentioned background technique.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A source applicator combination device for intracavitary radiotherapy of cervical cancer, the source applicator combination device comprising: an outer sleeve, an inner barrel frame, insertion strips, a vaginal orifice fixing member, and implant needles. One end of the outer sleeve inserted into the patient's vagina fits against the vaginal stump after surgery. A plurality of evenly distributed annular clamping rings are fixedly installed on the outer surface of the other end of the outer sleeve. The vaginal orifice fixing member is sleeved on the outer surface of the outer sleeve, and the vaginal orifice fixing member is clamped with the annular clamping rings. The outer sleeve is sleeved on the outer surface of the inner barrel frame. The vaginal orifice fixing member is detachably connected to the hospital bed. Insertion strip channels corresponding to the insertion strips are provided inside the inner barrel frame, and several of the insertion strips are respectively inserted into the corresponding insertion strip channels;

[0007] The insertion strip comprises: a treatment insertion strip and a protective lead strip, and the implant needle is inserted into the inside of the treatment insertion strip;

[0008] A limiting mechanism is provided between the insertion strip and the inner barrel frame, and a fixing mechanism is provided between the implant needle and the treatment insertion strip.

[0009] Further, the end shapes of the outer sleeve and the inner barrel frame close to the vaginal stump after surgery are both set to be horn-shaped.

[0010] Further, the vaginal orifice fixing member comprises: an outer sleeve positioning member and a connecting rod. The two sides of the outer sleeve positioning member are respectively fixedly connected to the two connecting rods. The other ends of the two connecting rods are both detachably connected to the hospital bed. The outer sleeve positioning member is clamped with the annular clamping ring, and the outer sleeve positioning member is fixed to the outer sleeve by tightening a screw.

[0011] Further, the materials of the outer sleeve and the inner barrel frame are both set to be transparent materials, and the materials of the outer sleeve positioning member and the annular clamping ring are both set to be silica gel materials.

[0012] Further, the limiting mechanism comprises: a limiting strip and a limiting card slot. The limiting card slot is opened on the outer surface of the insertion strip, the limiting strip is fixedly installed in the insertion strip channel, and the limiting strip is inserted into the limiting card slot.

[0013] Further, the end face shape of the inner barrel frame close to the annular clamping ring is set to be oval, the combined end face shape of several of the insertion strips is set to be oval, and the combined end face shape of several of the insertion strip channels is set to be oval.

[0014] Further, the fixing mechanism comprises: a fixing ring and a needle implantation hole channel. The needle implantation hole channel is opened inside the treatment insertion strip. The fixing ring is fixedly installed at the tail of the implant needle. The outer diameter of the fixing ring is greater than the diameter of the needle implantation hole channel, and the material of the fixing ring is set to be silica gel material.

[0015] Technical effects and advantages of the present utility model:

[0016] Compared with the prior art, by setting the shapes of the outer sleeve and the end of the inner cylinder frame to be horn-shaped, the present utility model fits better with the shape of the vaginal stump after surgery, and can better exert the local treatment advantage of brachytherapy; by using the transparent outer sleeve and inner cylinder frame of the material, without special external equipment and consumables, the precise implantation of the implanting needle, treatment insert and shielding lead strip in the source applicator device can be observed with the naked eye, and thus provide a reference for determining the insertion depth of the needle subsequently; it is applicable to various treatment needs of patients, such as vaginal boost treatment, stump recurrence treatment, and local eccentric lesion treatment of the vaginal wall; by setting the limiting mechanism and the fixing mechanism, the fixing and limiting of the inner cylinder frame and the insertion strip are realized, avoiding the situation of shaking and falling off of the insertion strip, ensuring the stability of the implanting needle during the whole treatment process of the patient, reducing treatment deviation, and ensuring the safety of the patient; by setting the silica gel skin, the relative fixation of the source applicator device and the human body is realized; by setting the vaginal orifice fixing piece, the fixation of the source applicator device during the patient's transportation is realized. Description of the drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0018] Figure 2 is Figure 1 The enlarged schematic diagram at A in

[0019] Figure 3 It is a schematic diagram of the end structure of the outer sleeve of the present utility model.

[0020] Figure 4 It is a schematic diagram of the sectional structure of the present utility model.

[0021] Figure 5 It is a schematic diagram of the structure of the limiting mechanism of the present utility model.

[0022] Figure 6 It is a schematic diagram of the structure of the insertion strip channel of the present utility model.

[0023] The reference signs are:

[0024] 1. Outer sleeve; 11. Annular snap ring;

[0025] 2. Inner cylinder frame; 21. Insertion strip channel;

[0026] 3. Insertion strip; 31. Treatment insert; 32. Shielding lead strip;

[0027] 4. Vaginal orifice fixing piece; 41. Outer sleeve positioning piece; 42. Connecting rod;

[0028] 5. Implanting needle;

[0029] 6. Limiting mechanism; 61. Limiting strip; 62. Limiting card slot;

[0030] 7. Fixing mechanism; 71. Fixing ring; 72. Needle-implanting pore channel;

[0031] 8. Tightening screw; 9. Silicone skin. Detailed implementation manner

[0032] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0033] As shown in the attached Figures 1-6 A source applicator combination device for intracavitary radiotherapy of cervical cancer, the source applicator combination device includes: outer sleeve 1, inner barrel frame 2, insertion strip 3, vaginal orifice fixing member 4 and implanting needle 5,

[0034] Among them, the outer sleeve 1 and the inner barrel frame 2 in the source applicator combination device have various sizes to meet the treatment needs of patients with different vaginal conditions; and the sleeves 1 and the inner barrel frames 2 of different sizes are matched with the corresponding insertion strips 3 of corresponding sizes;

[0035] One end of the outer sleeve 1 inserted into the patient's vagina fits against the vaginal postoperative stump. A plurality of evenly distributed annular snap rings 11 are fixedly installed on the outer surface of the other end of the outer sleeve 1. The vaginal orifice fixing member 4 is sleeved on the outer surface of the outer sleeve 1, and the vaginal orifice fixing member 4 is snap-connected with the annular snap rings 11. The outer sleeve 1 is sleeved on the outer surface of the inner barrel frame 2. The vaginal orifice fixing member 4 is detachably connected to the hospital bed. An insertion strip channel 21 corresponding to the insertion strip 3 is opened inside the inner barrel frame 2, and several insertion strips 3 are respectively inserted into the corresponding insertion strip channels 21;

[0036] Among them, in the embodiment of the inner barrel frame 2: eight insertion strip channels 21 are opened inside the inner barrel frame 2; the corresponding insertion strips 3 can be marked and distinguished by numbers or letters;

[0037] The insertion strip 3 includes: a treatment insertion strip 31 and a shielding lead strip 32, and the implanting needle 5 is inserted into the inside of the treatment insertion strip 31;

[0038] Among them, the shielding lead strip 32 can play an effect of radiation protection and reduce the radiation of intracavitary radiotherapy to normal human tissues;

[0039] Among them, the present utility model can meet various treatment needs of patients, such as vaginal boost treatment, stump recurrence treatment, and local eccentric lesion treatment of the vaginal wall.

[0040] A limiting mechanism 6 is provided between the plugging strip 3 and the inner cylinder frame 2; so as to fix and limit the plugging strip 3, avoid shaking and falling off of the plugging strip 3, and further improve the stability of the implanting needle 5;

[0041] A fixing mechanism 7 is provided between the implanting needle 5 and the treatment plugging strip 31; so as to fix the implanting needle 5, ensure the stability of the implanting needle 5 during the whole treatment process of the patient, effectively reduce the treatment deviation, and ensure the safety of the patient.

[0042] In a preferred embodiment, as shown in the appendix Figures 1-6 As shown, the end shapes of the outer sleeve 1 and the inner cylinder frame 2 near the vaginal postoperative stump are both set to be horn-shaped; so that the outer sleeve 1 and the inner cylinder frame 2 can better fit the actual structure of the vaginal postoperative stump, and can better exert the local treatment advantage of brachytherapy; and there are penetrable needle holes on the end face of the outer sleeve 1 and the end face of the treatment plugging strip 31, so that the implanting needle 5 can pass through;

[0043] Among them, examples of the outer sleeve 1 and the inner cylinder frame 2: the outer sleeve 1 can be selected with diameters of 20mm, 23mm, 26mm, 30mm, 35mm; the length range of the outer sleeve 1 is set between 12 - 15 cm; the horn lengths at the ends of the outer sleeve 1 and the inner cylinder frame 2 are 0.5 - 2 cm.

[0044] In a preferred embodiment, as shown in the appendix Figures 1-6 As shown, the vaginal orifice fixing member 4 includes: an outer sleeve positioning member 41 and a connecting rod 42. The two sides of the outer sleeve positioning member 41 are respectively fixedly connected to the two connecting rods 42, and the other ends of the two connecting rods 42 are both detachably connected to the hospital bed. The outer sleeve positioning member 41 is clamped with the annular snap ring 11, and the outer sleeve positioning member 41 is fixed to the outer sleeve 1 by tightening the screw 8; so as to use the outer sleeve positioning member 41 to limit at the vaginal orifice of the patient, so that the end of the inner cylinder frame 2 can penetrate into the lesion of the vagina, and the connecting rod 42 can be connected to the hospital bed, and further maintain the fixation between the hospital bed and the source application combination device, which helps to fix the human body and the source application combination device.

[0045] In a preferred embodiment, as shown in the appendix Figures 1-6 As shown, the materials of the outer sleeve 1 and the inner cylinder frame 2 are both set to be transparent materials, so as to use the transparent materials to realize the precise implantation of the implanting needle 5, the treatment plugging strip 31 and the shielding lead strip 32 in the source application combination device under naked eye observation; and further provide a reference for determining and adjusting the implantation depth of the implanting needle 5 in the follow-up; the materials of the outer sleeve positioning member 41 and the annular snap ring 11 are both set to be silicone materials, so as to facilitate the clamping between the outer sleeve positioning member 41 and the annular snap ring 11 by using the anti-slip property and elasticity of the silicone materials.

[0046] In a preferred embodiment, as shown in the appendix Figures 1-6As shown in the figure, the limiting mechanism 6 includes: a limiting strip 61 and a limiting card slot 62. The limiting card slot 62 is opened on the outer surface of the insertion strip 3, and the limiting strip 61 is fixedly installed in the insertion strip channel 21. The limiting strip 61 is inserted into the limiting card slot 62;

[0047] Among them, after the limiting strip 61 is inserted into the limiting card slot 62, the insertion strip 3 can be restricted by the limiting strip 61 to prevent it from shaking and shifting; the limiting strip 61 can be made of silicone material to utilize its elastic and anti-slip characteristics.

[0048] In a preferred embodiment, as shown in the appendix Figures 1-6 As shown in the figure, the end face shape of the inner cylinder frame 2 close to the annular snap ring 11 is set to be oval, the end face shape of several combined insertion strips 3 is set to be oval, and the end face shape of several combined insertion strip channels 21 is set to be oval;

[0049] Among them, if there are 8 insertion strip channels 21, and the upper row is marked as 1, 2, 3, 4 and the lower row is marked as 5, 6, 7, 8, then the sizes of 1, 4, 5, 8 are the same, and the same insertion strip 3 is used, while the sizes of 2, 3, 6, 7 are the same, and the same insertion strip 3 is used;

[0050] In a preferred embodiment, as shown in the appendix Figures 1-6 As shown in the figure, the fixing mechanism 7 includes: a fixing ring 71 and a needle-implanting hole 72. The needle-implanting hole 72 is opened inside the treatment insertion strip 31, and several fixing rings 71 are fixedly installed at the tail of the implanting needle 5. The outer diameter of the fixing ring 71 is larger than the diameter of the needle-implanting hole 72, and the material of the fixing ring 71 is set to be silicone material.

[0051] A method for using a source applicator combination device for cervical cancer brachytherapy is as follows:

[0052] S1: After disinfecting and cleaning the relevant instruments, use a speculum to open the vagina of the lithotomy position patient. According to the patient's lesion characteristics and vaginal conditions, select a suitable-sized outer sleeve 1 and inner cylinder frame 2 in the shape of a ram's horn; then enter S2;

[0053] S2: Under the gynecological examination lamp, insert the outer sleeve 1 into the patient's vagina. Use the transparent outer sleeve 1 to observe the lesion position, and at the same time, observe and determine whether the ram's horn-shaped end of the outer sleeve 1 can closely fit the postoperative stump: if it can, enter S3; if not, replace the outer sleeve 1 of other sizes and re-perform S2;

[0054] S3: After confirming that the outer sleeve 1 reaches the position, install the outer sleeve positioning member 41 and snap it onto the corresponding annular snap ring 11 on the outer sleeve 1, and make the outer sleeve positioning member 41 contact the patient's skin. Then, fix the outer sleeve positioning member 41 on the outer sleeve 1 by tightening the screw 8, and then enter S4;

[0055] S4: Determine the plug-in strip channels 21 to be used inside the inner cylinder rack 2 according to actual needs, use a probe to determine the corresponding implantation depth, and make a record; set the plug-in strip channels 21 to be used as treatment channels, and set the other plug-in strip channels 21 as protection channels; then proceed to S5;

[0056] S5: According to the data recorded in S4, combined with the pre-treatment diagnostic images, select the treatment inserts 31 to be inserted into the treatment channels and the protection lead strips 32 to be inserted into the protection channels from several treatment inserts 31 and several protection lead strips 32 supporting the inner cylinder rack 2;

[0057] Then insert the implanting needle 5 into the needle inserting hole 72 inside the corresponding treatment insert 31, and insert the fixing ring 71 at the tail of the implanting needle 5 into the needle inserting hole 72 to ensure that the implanting needle 5 is implanted at the accurate depth recorded in S4;

[0058] Next, insert the treatment insert 31 containing the implanting needle 5 into the corresponding treatment channel and fix it by means of a card slot; and insert the selected protection lead strip 32 into the corresponding protection channel and fix it by means of a card slot;

[0059] Then implant the assembled inner cylinder rack 2 into the outer sleeve 1, and fix the inner cylinder rack 2 and the outer sleeve 1 by means of a card slot; then proceed to S6;

[0060] S6: After installing the inner cylinder rack 2, install the left and right connecting rods 42, and use the silicone skin 9 on the surface of the connecting rods 42 to fit and fix with the inner side of the patient's thigh to prevent the implanted source combination device from rotating or shaking; connect one end of the connecting rod 42 to the fixator on the transfer bed, so as to ensure that the relative position of the source combination device and the transfer bed remains unchanged; after the source combination device is fixed on the transfer bed and the patient and the source combination device are firmly fixed, proceed to S7;

[0061] S7: Transfer the patient to the CT room to complete the CT image acquisition for brachytherapy;

[0062] S8: According to the real-time CT scan images, combined with the pre-treatment diagnosis results, adjust the depth of the implanting needle 5 inserted into the needle inserting hole 72 as needed, and finally complete the operation.

[0063] In a preferred embodiment, as shown in the appendix Figures 1-6 In S5, the size of the plug-in strip 3 supporting the inner cylinder rack 2 is the same as the size of the corresponding plug-in strip channel 21 of the inner cylinder rack 2.

[0064] In a preferred embodiment, as shown in the appendix Figures 1-6 In S5, the size of the treatment insert 31 is the same as the size of the corresponding protection lead strip 32.

[0065] Among them, the planting needle 5 is provided with a scale and corresponding size markings, and the outer sleeve 1 is also provided with a scale and corresponding size markings.

[0066] Among them, after the device is used up, first disconnect the connecting rod 42 from the transfer bed, then pull out the whole from the patient's vagina, and then the outer sleeve 1 can be separated from the inner cylinder frame 2, and further the insertion strip 3 on the inner cylinder frame 2 can be detached from the inner cylinder frame 2; after the corresponding components are removed, they are cleaned and disinfected for subsequent reuse.

[0067] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0068] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined source device for cervical cancer brachytherapy, characterized in that: The source assembly device comprises: an outer sleeve (1), an inner sleeve frame (2), a plug-in strip (3), a vaginal opening fixing piece (4) and an implant needle (5); one end of the outer sleeve (1) inserted into the patient's vagina fits the postoperative stump of the vagina; the outer surface of the other end of the outer sleeve (1) is fixedly mounted with a plurality of evenly distributed annular clamps (11); the vaginal opening fixing piece (4) is sleeved on the outer surface of the outer sleeve (1), and the vaginal opening fixing piece (4) is clamped with the annular clamps (11); the outer sleeve (1) is sleeved on the outer surface of the inner sleeve frame (2); the vaginal opening fixing piece (4) is detachably connected to the bed; a plug-in strip channel (21) corresponding to the plug-in strip (3) is provided inside the inner sleeve frame (2); a plurality of the plug-in strips (3) are respectively inserted into the corresponding plug-in strip channels (21); The insertion strip (3) comprises: a treatment insertion strip (31) and a protective lead strip (32), and the insertion needle (5) is inserted into the interior of the treatment insertion strip (31); A limiting mechanism (6) is provided between the insertion strip (3) and the inner tube frame (2), and a fixing mechanism (7) is provided between the insertion needle (5) and the treatment insertion strip (31).

2. The source assembly device for cervical cancer brachytherapy according to claim 1, characterized in that: The ends of the outer sleeve (1) and the inner sleeve frame (2) close to the post-vaginal stump are both arranged in the shape of ram horns.

3. The source assembly device for cervical cancer brachytherapy according to claim 2, characterized in that: The vaginal opening fixing member (4) comprises: an outer sleeve positioning member (41) and a connecting rod (42), the two sides of the outer sleeve positioning member (41) are respectively fixedly connected to the two connecting rods (42), the other ends of the two connecting rods (42) are detachably connected to the hospital bed, the outer sleeve positioning member (41) is clamped with an annular clamping ring (11), and the outer sleeve positioning member (41) is fixed to the outer sleeve (1) by tightening the screw (8).

4. The source assembly device for cervical cancer brachytherapy according to claim 3, characterized in that: The outer sleeve (1) and the inner sleeve frame (2) are both made of transparent materials, and the outer sleeve positioning piece (41) and the annular clamping ring (11) are both made of silicone materials.

5. The combined source device for cervical cancer brachytherapy according to claim 1, characterized in that: The limiting mechanism (6) comprises: a limiting strip (61) and a limiting slot (62); the limiting slot (62) is provided on the outer surface of the plug-in strip (3); the limiting strip (61) is fixedly installed in the plug-in strip channel (21); and the limiting strip (61) is inserted into the limiting slot (62).

6. The source assembly device for cervical cancer brachytherapy according to claim 1, characterized in that: The end face shape of the inner cylinder frame (2) close to the annular clamping ring (11) is set to be an ellipse, the end face shape of a plurality of the plug-in strips (3) after being combined is set to be an ellipse, and the end face shape of a plurality of the plug-in strip channels (21) after being combined is set to be an ellipse.

7. The combined source device for cervical cancer brachytherapy according to claim 1, characterized in that: The fixing mechanism (7) comprises: a fixing ring (71) and a needle implantation channel (72); the needle implantation channel (72) is provided inside the treatment insert (31); the fixing ring (71) is fixedly mounted on the tail of the implantation needle (5); the outer diameter of the fixing ring (71) is greater than the diameter of the needle implantation channel (72); and the material of the fixing ring (71) is set to be a silicone material.

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