Multi-channel source applicator

Abstract

The utility model belongs to the technical field of radiotherapy, and particularly relates to a multi-channel source applicator, which comprises an outer tube and a plurality of source application channels arranged in a cavity of the outer tube, and is characterized in that an opening end of the outer tube is provided with a blocking piece in a sliding manner, and the sliding direction of the blocking piece is perpendicular to the length direction of the source application tube; and the plurality of source application pipes are inserted into the outer pipe cavity through the source application channels and are fixed through the blocking pieces. The source application pipe is inserted into the source application channel, the source application pipe can be clamped and fixed through simple up-and-down movement of the blocking piece, and operation is extremely simple. Due to the design of the through holes, the blocking piece is easy to machine and low in cost, the source application pipe and the blocking piece are easy and convenient to assemble and disassemble, and cleaning and sterilization of all parts are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of radiotherapy, and in particular relates to a multi-channel applicator. Background Art

[0002] When a cancer patient is given afterloading radiotherapy, the patient lies on the afterloading bed, the applicator is placed in the patient's body, the afterloading bed is pushed into the afterloading treatment room, and the afterloading treatment machine and the applicator are connected by an applicator tube to form a radiation source travel channel. The applicator tube is used to transport radioisotopes or other radioactive substances, and the stability of the applicator tube fixation directly affects the accuracy and safety of radiotherapy. However, the prior art still has the problem of unstable fixation of the applicator tube.

[0003] The traditional method of fixing the source tube is to use bonding. The glue of this fixing method will age, which is not conducive to assembly and disassembly, repeated disinfection and sterilization. After a long time of use, the glue will lose its fixing effect and become loose, affecting the use effect, and it is not suitable for long-term repeated disinfection and sterilization.

[0004] Chinese patent "201180033075.4" discloses a brachytherapy applicator device for inserting into a body cavity, with a source channel in the center and multiple source channels evenly distributed around the center. The source tube with a blocking sleeve is filled inside, and a blocking cover rotating around the central channel is provided at the end of the shell to block the source tube, thereby achieving fixation of the source tube. The patent has a complex structure and adopts injection molding, which is difficult to process and has a high cost.

[0005] Chinese patent "201822026698.0" discloses a cavity applicator for radiotherapy, which has a cavity in the center and multiple cavity applicators evenly distributed around the center. A hose is placed in the evenly distributed cavity applicators, and the hose is fixed by plugging it with a sleeve. Although the fixed sleeve in this patent can achieve fixation, it is not a stable fixation. It cannot be identified if it is loose during use. It is also difficult to process and has strict matching size requirements. The deep blind hole in this patent is easy to retain fluid during sterilization, which is not conducive to disinfection. Utility Model Content

[0006] The utility model aims to overcome the deficiencies of the prior art and provide a multi-channel source applicator, which can fix the source tube by simply moving the blocking member radially, and is not only simple to manufacture but also convenient to install and operate.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multi-channel source applicator, including an outer tube, and a plurality of source channels arranged in the outer tube cavity, characterized in that a blocking member is slidably provided at the open end of the outer tube, and the sliding direction of the blocking member is perpendicular to the length direction of the source tube, and a plurality of source tubes are inserted into the outer tube cavity through the source channels and fixed by the blocking member.

[0008] Preferably, the application source channel includes a middle application source channel and a peripheral application source channel, the middle application source channel is arranged at the axis center of the outer tube, and the peripheral application source channels are uniformly arranged in the outer tube cavity around the middle application source channel.

[0009] Preferably, the source tube includes a middle source tube and a peripheral source tube, and the diameter of the middle source tube is greater than the diameter of the peripheral source tube.

[0010] Preferably, a blocking member installation groove is radially provided on the outer tube, and the blocking member is slidably arranged on the inner side of the opening end of the outer tube through the blocking member installation groove.

[0011] Preferably, the blocking member is a blocking piece.

[0012] Preferably, the thickness of the baffle is 1.5-4 mm.

[0013] Preferably, a baffle fixing hole and a plurality of source tube fixing holes cooperating with the source tube are opened on the baffle, and a locking pin is installed in the baffle fixing hole to fix the baffle, and the source tube fixing hole includes a large fixing hole and a small fixing hole, and the large fixing hole and the small fixing hole are connected.

[0014] Preferably, the source tube includes a middle source tube and a peripheral source tube, a boss corresponding to the position of the baffle is provided on the peripheral source tube, the large mounting hole diameter of the source tube fixed mounting hole is larger than the boss diameter, and the small fixing hole is interference fit with the peripheral source tube.

[0015] Compared with the prior art, the above technical solution has the following beneficial effects: the utility model is a multi-channel source applicator, which has multiple source channels and can perform multiple source tube operations at the same time, thereby improving work efficiency. The source tube is inserted into the outer tube through the source channel, and the source tube can be clamped and fixed by simply moving the blocking member up and down. The utility model is not only simple in structure, but also adopts a through-hole design, so that the blocking member is easy to process and low in cost, and the installation and disassembly of the source tube and the blocking member are simple and convenient, which is conducive to the cleaning and sterilization of each component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the multi-channel source applicator of the utility model.

[0017] Figure 2 It is a top view of the utility model.

[0018] Figure 3 It is a side view of the utility model.

[0019] Figure 4 A cross-sectional view of the outer tube.

[0020] Figure 5 A top view of the outer tube.

[0021] Figure 6 It is a schematic diagram of the structure of the baffle.

[0022] Figure 7 This is a schematic diagram of the peripheral source pipe structure.

[0023] Figure 8 Schematic diagram of the locking ball structure.

[0024] Fig. 9 It is a schematic diagram of the locking pin structure.

[0025] Fig.10 This is a schematic diagram of the source tube in an unobstructed state.

[0026] Fig.11 This is a schematic diagram of the blocked state of the source tube.

[0027] Among them: 1. Outer tube; 2. Baffle; 3. Peripheral source tube; 4. Middle source tube; 5. Locking nail; 6. Middle source channel; 7. Peripheral source channel; 8. Baffle mounting groove; 9. Source tube fixed mounting hole; 901, small fixing hole; 902, large mounting hole; 10. Baffle fixing hole; 11, boss; 12, locking ball; 13, locking pin. DETAILED DESCRIPTION

[0028] Figures 1 to 11 It is the best embodiment of the utility model, and the following Figures 1 to 11 The utility model is further described.

[0029] like Figures 1 to 3 As shown, a multi-channel source applicator of the utility model comprises a cylindrical outer tube 1 with a closed end being an arc surface, and a plurality of source channels arranged in the cavity of the outer tube 1. In this embodiment, in order to facilitate the arrangement of the source channels, the outer tube 1 adopts a honeycomb tube. The source channels include an intermediate source channel 6 and a peripheral source channel 7. The intermediate source channel 6 is arranged at the axis of the outer tube 1. The peripheral source channels 7 are evenly arranged in the cavity of the outer tube 1 around the intermediate source channel 6. The number of the peripheral source channels 7 and the distance from the center of the circle can be adjusted as needed. The corresponding positions of each source channel are provided with digital identifications for identifying and distinguishing each channel. The numbers can be engraved or laser printed and will not be lost due to sterilization. Multiple source tubes are inserted into the cavity of the outer tube 1 through the source channels. The source tubes include an intermediate source tube 4 and a peripheral source tube 3. The intermediate source tube 4 is inserted into the cavity of the outer tube 1 through the intermediate source channel 6, and the peripheral source tube 3 is inserted into the cavity of the outer tube 1 through the peripheral source tube 3.

[0030] Combination Figure 4 , 5A baffle 2 is slidably provided at the open end of the outer tube 1 where the source tube is inserted. A baffle installation groove 8 is radially provided on the outer tube 1. The baffle 2 is slid up and down in the outer tube 1 through the baffle installation groove 8. The sliding direction of the baffle 2 is perpendicular to the length direction of the source tube. The baffle 2 fixes the source tube in the outer tube 1.

[0031] For details, see Figure 1 , 6 The thickness of the baffle 2 is 1.5-4 mm. In this embodiment, the thickness of the baffle 2 is 2 mm. A baffle fixing hole 10 and a plurality of source tube fixing holes 9 that cooperate with the source tube are provided on the baffle 2. In this embodiment, the source tube fixing holes 9 whose centers are located in the same vertical direction are connected to facilitate the processing of the baffle 2. The locking nail 5 is installed in the baffle fixing hole 10 to fix the baffle 2. The tightening degree of the locking nail 5 can be determined according to the strength of the baffle 2 moving up and down; the locking nail 5 can also prevent the baffle 2 from accidentally moving up and down during the use of the source applicator, causing the surrounding source tube 3 to loosen.

[0032] For further information, see Figure 6 , 7 , a boss 11 corresponding to the position of the baffle 2 is provided on the peripheral source tube 3, and the source tube fixed installation hole 9 includes a large installation hole 902 and a small fixing hole 901, and the large installation hole 902 and the small fixing hole 901 are connected. The diameter of the large installation hole 902 of the source tube fixed installation hole 9 is larger than the diameter of the boss 11, and the small fixing hole 901 is interference fit with the peripheral source tube 3. In this embodiment, the middle source tube 4 does not have an annular boss 11, and the diameter of the middle source tube 4 is larger than the diameter of the peripheral source tube 3. It can be directly installed and fixed in the middle source channel 6, and its front and rear positions can be freely moved so that the right side can extend from the outer tube 1 to meet specific needs. In this embodiment, the diameters of the large installation hole 902 and the small fixing hole 901 of the source tube fixed installation hole 9 where the middle source tube 4 is installed are the same.

[0033] As shown in FIGS. 8 and 9 , in addition to using the locking nail 5 to fix the baffle 2 , a locking ball 12 and a locking pin 13 may also be used. The locking ball 12 or the locking pin 13 tightens the baffle 2 to increase the friction of the baffle 2 moving up and down.

[0034] The working process of the utility model: combined Fig.10 , 11 First, install the baffle 2 from the baffle installation groove 8 into the outer tube 1, and select the appropriate peripheral source channel 7 according to the needs to insert it into the required peripheral source tube 3. Then, by sliding the baffle 2 up and down, fix the peripheral source tube 3 in the outer tube 1 to ensure the stability of the position of the peripheral source tube 3. Then adjust the fixing force of the baffle 2 by tightening the locking nail 5 to ensure that the peripheral source tube 3 will not move accidentally.

[0035] The multi-channel source applicator of the utility model has multiple source application channels, and multiple source application tube operations can be performed simultaneously, thereby improving work efficiency. Through the use of honeycomb tubes, the source application channels in the cavity of the outer tube 1 can be conveniently set and flexibly adjusted according to needs. Each source application channel has a digital identification, which is convenient for distinguishing and identifying each channel. The digital identification is applied to the outer tube 1 by engraving or laser printing, and will not be lost due to sterilization; the design of the baffle 2 and the locking pin 5 makes the position of the source tube fixed in the outer tube 1 stable and reliable, and not easy to loosen; the front and rear positions of the middle source tube 4 can be freely moved to meet specific needs.

[0036] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A multi-channel applicator, comprising an outer tube (1), and a plurality of applicator channels arranged in a cavity of the outer tube (1), characterized in that: A blocking member is slidably provided at the open end of the outer tube (1), wherein the sliding direction of the blocking member is perpendicular to the length direction of the source tube. A plurality of source tubes are inserted into the cavity of the outer tube (1) through the source passage and fixed by the blocking member.

2. A multi-channel applicator according to claim 1, characterized in that: The application source channel comprises a middle application source channel (6) and a peripheral application source channel (7); the middle application source channel (6) is arranged at the axis of the outer tube (1); and the peripheral application source channel (7) surrounds the middle application source channel (6) and is evenly arranged in the cavity of the outer tube (1).

3. A multi-channel applicator according to claim 1, characterized in that: The source tubes comprise a middle source tube (4) and a peripheral source tube (3); the diameter of the middle source tube (4) is greater than the diameter of the peripheral source tube (3).

4. A multi-channel applicator according to claim 1, characterized in that: A stopper installation groove (8) is radially provided on the outer tube (1), and the stopper is slidably arranged on the inner side of the opening end of the outer tube (1) through the stopper installation groove (8).

5. A multi-channel applicator according to claim 4, characterized in that: The blocking member is a blocking piece (2).

6. A multi-channel applicator according to claim 5, characterized in that: The thickness of the baffle (2) is 1.5-4 mm.

7. A multi-channel applicator according to claim 5, characterized in that: The baffle (2) is provided with a baffle fixing hole (10) and a plurality of source tube fixing holes (9) that cooperate with the source tube. A locking pin (5) is installed in the baffle fixing hole (10) for fixing the baffle (2). The source tube fixing hole (9) comprises a large mounting hole (902) and a small fixing hole (901). The large mounting hole (902) and the small fixing hole (901) are arranged in communication.

8. A multi-channel applicator according to claim 7, characterized in that: The source tube comprises a middle source tube (4) and a peripheral source tube (3), a boss (11) corresponding to the position of the baffle (2) is provided on the peripheral source tube (3), the diameter of the large mounting hole (902) of the source tube fixing mounting hole (9) is larger than the diameter of the boss (11), and the small fixing hole (901) is interference fit with the peripheral source tube (3).

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