CN221732161U - Radioactive particle implantation system - Google Patents

Abstract

The utility model relates to the technical field of radioactive medical instruments and discloses a radioactive particle implantation system which comprises a shell, a particle feeding assembly, a particle storage tube and a flowering bar, wherein the bottom of the lower end of the shell is provided with a connector, a particle inlet is arranged in the connector, the particle feeding assembly is arranged at the inner upper end of the shell and extends out of the side wall of the shell, the particle storage tube is arranged in the shell and is connected with the particle feeding assembly, the flowering bar is connected with the particle storage tube, the flowering bar comprises a particle channel, the particle channel is positioned in the flowering bar and penetrates through the upper end and the lower end of the flowering bar, the particle channel is communicated with the particle storage tube, a first baffle plate perpendicular to the flowering bar is arranged on the flowering bar, and a first spring is arranged on the flowering bar below the first baffle plate.

Description

A radioactive seed implantation system

Technical Field

The utility model relates to the technical field of radioactive medical equipment, in particular to a radioactive particle implantation system.

Background Art

Radiotherapy is one of the main methods for treating tumors. For a long time, external radiotherapy has occupied a major position. In recent years, close-range radiotherapy has attracted more and more attention and achieved surprising results. The full name of radioactive particle implantation is "radioactive particle interstitial implantation close-range therapy", which is a method of implanting an iodine-125 particle radioactive source into the tumor, damaging the DNA of tumor cells by releasing radiation, and finally inducing tumor cell necrosis and apoptosis. Iodine-125 particles are a radioactive nuclide that can release X-rays and low-energy radioactive isotope gamma rays, with an average energy of 27.4-35.4keV, a radioactivity of 0.4-1.0mCi, an interstitial radiation diameter of 1.7cm, and a half-life of 60.2d. Iodine-125 particles produce low-energy gamma rays, which destroy the DNA double strands of the tumor cell nucleus, affecting the DNA in the G2 and M phases of the proliferation cycle, thereby losing the ability to proliferate; at the same time, it has the advantages of radiobiology, making reoxygenation and sublethal damage repair form an opposing unity. Compared with external radiotherapy, radioactive iodine 125 particles have the following characteristics: 1. Accurate positioning, increased radiation dose in the target area, and little radiation damage to surrounding normal tissues; 2. Uninterrupted low-dose irradiation of tumor cells entering different division cycles can be performed to improve the biological effect; 3. Iodine 125 particles have the characteristics of short half-life, low activity, low energy, and easy protection.

Particle implantation therapy involves radioactive source implantation technology, the core of which is the arrangement of radioactive particles. Currently, the radioactive isotope of iodine 125 is used clinically. Each iodine 125 particle is a small radiation source, and the radiation near the center is the strongest, which can minimize damage to surrounding normal tissues.

In order to achieve the therapeutic effect, a certain number of radioactive particles need to be implanted into the tumor in a specific arrangement. Existing particle implantation devices include particle needles, particle magazines, push rods, and particle guns. First, under the guidance of images such as CT or ultrasound, the particle needle is used to puncture the tumor to the predetermined position. According to the preoperative TPS plan, the particles in the particle magazine are pushed to the appropriate position through the particle gun with a push rod. After withdrawing the particle needle to the next position and withdrawing the push rod above the magazine, the particle magazine will automatically pop out the next particle. Repeat the above operation to implant the predetermined number of particles into the lesion according to the Paris principle. With the development of technology, several particles can be arranged at intervals, and at the same time, they can be arranged into particle chains according to the requirements of the preoperative TPS plan, placed in the particle implantation channel, and implanted into the human body at one time. However, current medical devices still have many shortcomings.

Utility Model Content

The technical problem to be solved by the utility model is that the existing radioactive particle implantation device implants multiple particles by repeatedly pushing and pulling, which results in complex operation, long implantation time, and is time-consuming and labor-intensive.

In order to solve the above technical problems, the technical solution of the utility model is to provide a radioactive particle implantation system, including a shell, a particle delivery component, a particle pushing device and a flowering strip, a connecting head is provided at the bottom of the lower end of the shell, a particle inlet hole is provided in the connecting head, the particle delivery component is arranged at the upper end of the shell and extends out of the side wall of the shell, the flowering strip is connected to the particle delivery component, the flowering strip includes a particle channel, the particle channel is located inside the flowering strip and passes through the upper and lower ends of the flowering strip, and the particle channel is aligned with the particle inlet hole, a first baffle perpendicular to the flowering strip is provided on the flowering strip, a first spring is provided on the flowering strip below the first baffle, the lower end of the first spring is connected to the shell, and the particle pushing device is connected to the flowering strip.

By adopting the above technical solution, through the cooperation of the particle delivery component and the flowering strip, it is possible to achieve uniform and uniform particle implantation, and multiple particles can be implanted at a uniform speed at one time. The operation is simple, time-saving and labor-saving, and the risk of particle displacement can be reduced.

Optionally, the particle pushing device is a particle storage tube, which is arranged in the outer shell and connected to the particle sending component, the particle channel in the flowering strip is connected to the particle storage tube, a particle bin is provided in the particle storage tube, the particle bin is connected to the particle channel, a fourth spring is provided on the top of the particle bin, and the lower end of the fourth spring is connected to the push plate.

Optionally, the particle pushing device is a push rod, the diameter of the push rod is smaller than the diameter of the particle channel, the push rod is inserted into the particle channel from an end of the shell where no connector is provided, and the length of the push rod is greater than 1.5 times the length of the shell.

Optionally, the flowering strip also includes a sheath, flowering petals and a groove eye, the flowering petals are elastic and are provided with two, and are connected to the lower end of the flowering strip, a groove eye is formed between the two flowering petals, the groove eye is connected to the particle channel, the sheath is sleeved on the flowering petals, the flowering petals are trumpet-shaped, and the groove eye is aligned with the center of the particle inlet hole.

Optionally, the lower end of the shell is conical, a second baffle is provided in the shell, the second baffle is located on the conical area of the lower end of the shell, and a particle passing hole is provided on the second baffle.

Optionally, one end of the connector extends out of the housing, and the other end is connected to the second baffle and extends into the particle hole, and both the particle inlet hole and the particle hole are capsule-shaped.

By adopting the above technical solution, capsule-shaped particle inlet holes and particle outlet holes are provided, which facilitates the passage of particles when the flower petals are opened, and is suitable for a variety of particles.

Optionally, a third baffle is provided in the shell, the third baffle is located above the sheath, and a through hole is provided on the third baffle for the flower strip to pass through.

Optionally, the particle feeding assembly includes a pressing head and a moving column, the moving column is arranged in a shell, the side wall of the shell is provided with an opening, the pressing head is clamped on the moving column and extends out of the shell from the opening, the moving column is provided with an inclined groove, the angle between the inclined groove and the bottom surface of the moving column is an acute angle, the inner side of the pressing head is provided with an inclined column with the same inclination angle as the inclined groove, the inclined column is arranged in the inclined groove, and can slide in the inclined groove.

Optionally, the push head is U-shaped, a clamping column is provided on one end of the push head located inside the shell, an end cover is provided at the upper end of the shell, and a rough gripping surface is provided on the outside of the shell.

Optionally, the movable column is provided with a fixing hole which passes through the movable column up and down, the particle storage tube is arranged in the fixing hole, and a third spring is provided on the flower strip between the movable column and the first baffle.

In summary, the utility model has at least one of the following beneficial effects:

1. The utility model can realize uniform and uniform particle implantation by cooperating with the particle delivery component and the flowering strip, and can implant multiple particles at a uniform speed at one time, which is simple to operate, saves time and effort, and can reduce the risk of particle displacement.

2. The utility model is provided with an end cover on the shell, and a detachable matching particle storage tube is provided for easy replacement.

3. The utility model is provided with a push button on the shell, which can realize one-handed operation. The operator can complete the particle implantation in the operation with one hand, and the other hand can better stabilize the needle core. For some particle surgeries with higher risks, displacement can be avoided in the case of single-person operation, thereby reducing the risk of surgical bleeding. For surgeries that need to isolate the air, the water seal method can also be used to reduce the probability of pneumothorax caused by gas entering the patient's lungs. The utility model has strong operability, stable output and high safety.

4. The utility model adopts a particle storage tube to place particles in a shallow area and uses a push rod to push particles in a deeper area, which is suitable for non-deep particle implantation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a front cross-sectional structure of Embodiment 1 of the present utility model;

FIG2 is a schematic diagram of a front cross-sectional structure of Embodiment 2 of the present invention;

Fig. 3 is a cross-sectional view of the utility model at the flowering strip;

FIG4 is a schematic diagram of the structure of the push head of the utility model from a top view;

FIG5 is a schematic diagram of the top view of the connector of the utility model;

In the figure: 1. outer shell; 12. second baffle; 13. third baffle; 14. end cover; 121. particle passing hole; 2. particle delivery component; 21. press head; 211. clamping column; 22. moving column; 23. inclined slot; 24. inclined column; 3. particle storage tube; 31. fourth spring; 32. push plate; 4. flowering strip; 41. particle channel; 42. first baffle; 43. first spring; 44. slot eye; 45. flowering strip petal; 46. sheath; 5. connector; 51. particle inlet hole; 6. third spring; 7. push rod.

DETAILED DESCRIPTION

The utility model is further described in detail below in conjunction with Figures 1-5.

Example 1

The present embodiment is suitable for shallow lesions. The utility model discloses a radioactive particle implantation system, referring to FIGS. 1 and 3, comprising a shell 1, a particle delivery assembly 2, a particle storage tube 3 and a flowering strip 4. A connector 5 is provided at the bottom of the lower end of the shell 1, and a particle inlet hole 51 is provided in the connector 5. The particle delivery assembly 2 is provided at the upper end of the shell 1 and extends out of the side wall of the shell 1. The flowering strip 4 is connected to the particle delivery assembly 2. The flowering strip 4 comprises a particle channel 41, a sheath 46, a flowering strip petal 45 and a slot eye 44. The particle channel 41 is located inside the flowering strip 4 and runs through the upper and lower ends of the flowering strip 4. The particle channel 41 and the particle storage tube 3 are connected. The sub-tubes 3 are connected, the flowering strip 45 is elastic and is provided with two, and is connected to the lower end of the flowering strip 4, a groove 44 is formed between the two flowering strips 45, the groove 44 is connected to the particle channel 41, the sheath 46 is sleeved on the flowering strip 45, the flowering strip 45 is trumpet-shaped, the groove 44, the particle inlet hole 51 and the particle channel 41 are aligned in center, the flowering strip 4 is provided with a first baffle 42 perpendicular to the flowering strip 4, the flowering strip 4 below the first baffle 42 is provided with a first spring 43, the lower end of the first spring 43 is connected to the outer shell 1, and the particle storage tube 3 is arranged in the outer shell 1 and connected to the flowering strip 4.

In a further embodiment, the lower end of the shell 1 is conical, and a second baffle 12 is provided in the shell 1. The second baffle 12 is located on the conical area of the lower end of the shell 1, and a particle hole 121 is provided on the second baffle 12. One end of the connector 5 extends out of the shell 1, and the other end is connected to the second baffle 12 and extends into the particle hole 121. Referring to Figure 5, the particle inlet hole 51 and the particle hole 121 are both capsule-type, and a third baffle 13 is provided in the shell 1. The third baffle 13 is located above the sheath 46, and a through hole is provided on it for the flower strip 4 to pass through. An end cover 14 is provided at the upper end of the shell 1, and a rough gripping surface is provided on the outside of the shell 1.

In a further embodiment, referring to Figure 4, the particle feeding component 2 includes a pressing head 21 and a moving column 22, the moving column 22 is arranged in the outer shell 1, and the side wall of the outer shell 1 is provided with an opening, the pressing head 21 is clamped on the moving column 22 and extends out of the outer shell 1 from the opening, the moving column 22 is provided with an inclined groove 23, and the angle between the inclined groove 23 and the bottom surface of the moving column 22 is an acute angle, and the inner side of the pressing head 21 is provided with an inclined column 24 with the same inclination angle as the inclined groove 23, the inclined column 24 is arranged in the inclined groove 23, and can slide in the inclined groove 23, the pressing head 21 is U-shaped, and a clamping column 211 is provided on one end of the pressing head 21 located inside the outer shell 1, the moving column 22 is provided with a fixing hole running through it from top to bottom, the particle storage tube 3 is arranged in the fixing hole, and a third spring 6 is provided on the flowering strip 4 between the moving column 22 and the first baffle 42.

In a further embodiment, a particle bin is provided in the particle storage tube 3, the particle bin is connected to the particle channel 41, a fourth spring 31 is provided on the top of the particle bin, and the lower end of the fourth spring 31 is connected to a push plate 32, and the elastic force of the fourth spring 31 can be used to automatically push the particles.

In this embodiment, the materials of the shell 1, the push head 21 and the end cover 14 are all lead to reduce radioactive diffusion. When in use, the particles to be implanted are placed in the particle bin in the particle storage tube 3, and then the end cover 14 is opened, the particle storage tube 3 is placed in the fixing hole in the movable column 22 for fixing, and the opening of the particle storage tube 3 is connected to the particle channel 41 of the flowering strip 4, so that the particles can enter the particle channel 41, and then the patient's lesion is implanted. Because the lesion is shallow, the lesion is directly pierced through the connector 5 of the device for implantation, so that the connector 5 penetrates into the lesion, and then the push head 21 is pressed to make the movable column 22 drive the particle storage tube 3 to move downward, and at the same time push the flowering strip 4 downward. At this time, the first spring 43 and the third spring 6 are compressed, and when the sheath 46 reaches the second baffle 12, the sheath 46 is blocked and stops. The flowering strip 45 continues to move into the particle hole 121 and opens to both sides. The particles in the particle channel 41 move forward through the slot 44 and enter the particle inlet hole 51 of the connector 5. Then the push head 21 is released. Under the elastic force of the first spring 43 and the third spring 6, the flowering strip 4 moves upward without the particles being reset. At the same time, the connecting column 22 moves upward to push the push head 21 out of the housing 1. The sheath 46 stops after contacting the third baffle 13. At the same time, the flowering strip 45 merges and closes the slot 44. The above steps are repeated. The particles in the particle storage tube 3 move forward under the action of the fourth spring 31. The front particles move forward under the action of the rear particles and gravity until they are at the patient's lesion. Finally, they are stably implanted into the relevant solid tumor lesions. After the particles are implanted in one place, they can be replaced with another place.

After the particles in the particle storage tube 3 are implanted, the end cover can be opened for loading and replacement. The particle storage tube 3 can be replaced without taking out the particle implantation system of the utility model, which is convenient for replacement and can reduce the risk of particle displacement.

Example 2

This embodiment is suitable for deeper lesions. The difference between this embodiment and embodiment 1 is that, referring to Figure 2, the particle pushing device is a push rod 7, the diameter of the push rod 7 is smaller than the diameter of the particle channel 41, and the push rod 7 is inserted into the particle channel 41 from the end of the shell 1 where the connector 5 is not provided.

In this embodiment, the particle storage tube 3 is replaced by the push rod 7, and the particles are directly placed in the particle channel 41 from the upper end of the flowering strip 4, or the particle storage tube 3 is replaced by the push rod 7 after the particles in the particle storage tube 3 are pushed out; when in use, because the lesion is deep, it is first punctured with a puncture needle, and then the end of the connector 5 of the insertion device is aligned with the entrance of the puncture needle, and the particles in the particle storage tube 3 can be pushed out, and then replaced with the push rod 7, or the particle storage tube 3 is not used, and the particles are directly placed in the particle channel 41 of the flowering strip 4, and then the push rod 7 is placed in the particle channel 41, and the push head 21 is pressed. Under the action of gravity and thrust of the push rod 7, the particles in the flowering strip 4 or the residual particles in the puncture needle are pushed to the lesion.

The utility model changes the original structure of particle implantation, thereby realizing uniform and stable particle implantation through a relatively simple but sophisticated mechanical structure, which is more convenient to control, and compared with the original two-handed control, it is now changed to one-handed control. The operator can complete the particle implantation in the operation with one hand, and the other hand can better stabilize the needle core. For some particle surgeries with higher risks, displacement can be avoided in the case of single-person operation, thereby reducing the risk of surgical bleeding. For surgeries that need to isolate air, the water seal method can also be used to reduce the probability of pneumothorax caused by gas entering the patient's lungs. It has the advantages of strong operability, stable output, and high safety. The utility model is suitable for particle implantation in lesions of different depths and has a wide range of applications.

It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims (10)

1. A radioactive seed implantation system, characterized in that it comprises a shell (1), a seed delivery assembly (2), a seed push device and a flowering strip (4), wherein the shell (1) is provided with a connector (5) at the bottom of the lower end, and a seed inlet hole (51) is provided in the connector (5), the seed delivery assembly (2) is arranged at the upper end of the shell (1) and extends out of the side wall of the shell (1), the flowering strip (4) is connected to the seed delivery assembly (2), the flowering strip (4) comprises a seed channel (41), the seed channel (41) is located inside the flowering strip (4) and passes through the upper and lower ends of the flowering strip (4), and the seed channel (41) is aligned with the seed inlet hole (51), the flowering strip (4) is provided with a first baffle (42) perpendicular to the flowering strip (4), the flowering strip (4) below the first baffle (42) is provided with a first spring (43), the lower end of the first spring (43) is connected to the shell (1), and the seed push device is connected to the flowering strip. 2. The radioactive particle implantation system according to claim 1 is characterized in that the particle pushing device is a particle storage tube (3), the particle storage tube (3) is arranged in the outer shell (1) and is connected to the particle delivery component (2), the particle channel (41) in the flowering strip (4) is connected to the particle storage tube (3), a particle bin is arranged in the particle storage tube (3), the particle bin is connected to the particle channel (41), a fourth spring (31) is arranged on the top of the particle bin, and the lower end of the fourth spring (31) is connected to the push plate (32). 3. The radioactive particle implantation system according to claim 1 is characterized in that the particle pushing device is a push rod (7), the diameter of the push rod (7) is smaller than the diameter of the particle channel (41), the push rod (7) is inserted into the particle channel (41) from the end of the outer shell (1) where the connector (5) is not provided, and the length of the push rod (7) is greater than 1.5 times the length of the outer shell (1). 4. The radioactive particle implantation system according to claim 1 is characterized in that the flowering strip (4) also includes a sheath (46), flowering strip petals (45) and a groove eye (44), the flowering strip petals (45) are elastic and are provided with two, and are connected to the lower end of the flowering strip (4), and a groove eye (44) is formed between the two flowering strip petals (45), and the groove eye (44) is connected to the particle channel (41), the sheath (46) is sleeved on the flowering strip petals (45), the flowering strip petals (45) are trumpet-shaped, and the groove eye (44) is aligned with the center of the particle inlet hole (51). 5. The radioactive particle implantation system according to claim 4 is characterized in that the lower end of the shell (1) is conical, and a second baffle (12) is provided in the shell (1), the second baffle (12) is located on the conical area of the lower end of the shell (1), and a particle hole (121) is provided on the second baffle (12). 6. The radioactive seed implantation system according to claim 5 is characterized in that one end of the connector (5) extends out of the housing (1), and the other end is connected to the second baffle (12) and extends into the seed hole (121), and the seed inlet hole (51) and the seed hole (121) are both capsule-shaped. 7. The radioactive seed implantation system according to claim 4 is characterized in that a third baffle (13) is provided in the shell (1), the third baffle (13) is located above the sheath (46), and a through hole is provided thereon for the flower strip (4) to pass through. 8. The radioactive particle implantation system according to claim 2 is characterized in that the particle delivery component (2) includes a push head (21) and a movable column (22), the movable column (22) is arranged in the outer shell (1), the side wall of the outer shell (1) is provided with an opening, the push head (21) is clamped on the movable column (22) and extends out of the outer shell (1) from the opening, the movable column (22) is provided with an inclined groove (23), the angle between the inclined groove (23) and the bottom surface of the movable column (22) is an acute angle, the inner side of the push head (21) is provided with an inclined column (24) with the same inclination angle as the inclined groove (23), the inclined column (24) is arranged in the inclined groove (23) and can slide in the inclined groove (23). 9. The radioactive seed implantation system according to claim 8 is characterized in that the push head (21) is U-shaped, a clamping column (211) is provided on one end of the push head (21) located inside the shell (1), an end cover (14) is provided on the upper end of the shell (1), and a rough gripping surface is provided on the outside of the shell (1). 10. The radioactive particle implantation system according to claim 8 is characterized in that the movable column (22) is provided with a fixing hole which passes through the movable column (22) from top to bottom, the particle storage tube (3) is arranged in the fixing hole, and a third spring (6) is provided on the flower strip (4) between the movable column (22) and the first baffle (42).