Photodynamic therapeutic instrument

Abstract

The utility model discloses a photodynamic therapeutic instrument, which relates to the technical field of medical instruments and comprises a light guide assembly and a therapeutic instrument body, the light guide assembly comprises a light guide rod, one end of the light guide rod is a therapeutic end, and the other end of the light guide rod is a connecting end; a light-emitting source is arranged in the therapeutic instrument body and connected with the connecting end of the light guide bar, so that the therapeutic end of the light guide bar can conduct light therapy on the natural cavity of the human body. The light guide device is used for conducting light treatment on natural cavities such as the vagina and the oral cavity of a patient, the light guide diameter is small, the comfort degree of the patient during treatment can be improved, and therefore the compliance of light treatment of the patient is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a photodynamic therapy instrument. Background Technique

[0002] Introducing external light into the body cavity through the natural body cavity for light irradiation therapy is a novel treatment method. For example, cervical photodynamic therapy uses light-emitting devices such as light-emitting diodes and laser diodes as illumination units, and introduces the external illumination light source into the cervix, fornix, vaginal wall and other parts through the natural body cavity to achieve light irradiation therapy on the diseased area. Since the diseased area is located at the bottom of the human body cavity, it is necessary to use optical components to introduce the treatment light from the top to the bottom diseased area.

[0003] Currently, the commonly used light guide device in clinics is an optical fiber, whose diameter is usually less than 1 mm, suitable for long-distance light transmission. Its main disadvantage is that it is easy to break, and the light uniformity of the light emitted through the optical fiber is poor, and a light homogenizing device is needed to achieve light uniformity.

[0004] Secondly, when performing photodynamic therapy on parts such as the cervix, manufacturers such as Wuhan Yage use lenses and mirror barrels to achieve the transmission of light. Its disadvantage is that the outer diameter of the treatment head reaches 20 mm, and patients have a strong sense of discomfort during treatment.

[0005] Finally, the cooled inner cavity treatment photodynamic therapy head is also a solution. The treatment head includes a light-emitting array formed around the outer wall of the cooling cavity, a transparent treatment head shell is arranged outside the light-emitting array, and a coolant inlet pipe and a coolant outlet pipe are installed in the cooling cavity. And the coolant inlet pipe, the coolant outlet pipe, the cooling cavity and the treatment head shell form a treatment part inserted into the human body cavity, and it also has the problem of too large an outer diameter.

[0006] It can be seen that the existing light treatment devices for the natural body cavity of the human body have the problems that small-diameter optical fibers are easy to break or large-diameter treatment heads cause strong pain to patients. Content of the Utility Model

[0007] The purpose of the utility model is to provide a photodynamic therapy instrument to solve the problems existing in the above-mentioned prior art, which is used for light irradiation therapy on natural body cavities such as the vagina and oral cavity of patients. The light guide diameter is small, which can improve the comfort of patients during treatment, thereby ensuring the compliance of patients' light therapy.

[0008] To achieve the above purpose, the utility model provides the following scheme:

[0009] The utility model provides a photodynamic therapy instrument, which includes a light guiding component and a therapy instrument body. The light guiding component includes a light guiding rod, one end of the light guiding rod is a treatment end, and the other end is a connection end; a light emitting light source is arranged in the therapy instrument body, and the light emitting light source is connected to the connection end of the light guiding rod, so that the treatment end of the light guiding rod can perform light irradiation therapy on the natural cavity of the human body.

[0010] Preferably, the light guiding rod is a PMMA light guiding rod, and the diameter range of the light guiding rod is 1mm - 16mm.

[0011] Preferably, the light emitting light source includes a light emitting diode chip and a light source driving circuit. The end face of the light emitting diode chip is connected to the connection end of the light guiding rod, and the light source driving circuit is used to drive the light emitting diode chip to emit light.

[0012] Preferably, the therapy instrument body includes a housing. The light emitting diode chip and the light source driving circuit are both arranged in the housing. A through hole is arranged on one side of the housing close to the end face of the light emitting diode chip; the light guiding rod is fixed to the housing through a clamp, and the connection end of the light guiding rod penetrates through the through hole on the housing and is connected to the end face of the light emitting diode chip.

[0013] Preferably, the therapy instrument body further includes a heat dissipation component. The heat dissipation component is arranged in the housing and is used to dissipate heat from the light emitting diode chip; the heat dissipation component includes a fan and a plurality of heat dissipation fins. The air outlet end of the fan is arranged vertically downward with respect to the light emitting diode chip, and all the heat dissipation fins are evenly distributed between the fan and the light emitting diode chip; a plurality of air inlets are arranged on the housing on one side close to the end face of the clamp.

[0014] Preferably, the therapy instrument body further includes a touch display screen. The touch display screen is arranged on the housing and is electrically connected to the light source driving circuit.

[0015] Preferably, the light guiding component further includes a light guiding cover. The light guiding cover is used to be arranged at the end of the treatment end of the light guiding rod and is attached to the surface of the human cervix for light irradiation therapy.

[0016] Preferably, a connection hole is formed in the center of the light guiding cover, and the light guiding cover can be connected to the end of the treatment end of the light guiding rod through the connection hole.

[0017] Preferably, the light guiding component further includes a light homogenizing rod. The light homogenizing rod is used to be arranged at the end of the treatment end of the light guiding rod and extend into the human cervical canal for light irradiation therapy.

[0018] Preferably, the light scattering coefficient of the light homogenizing rod gradually increases in the direction away from the treatment end of the light guiding rod.

[0019] The present utility model has achieved the following technical effects compared with the prior art:

[0020] The photodynamic therapy instrument provided by the present utility model includes a light guiding component and a therapy instrument body. The light guiding component includes a light guiding rod. A light emitting light source is arranged inside the therapy instrument body. During use, the light emitted by the light emitting light source is conducted to the natural cavity of the human body through the light guiding rod for light irradiation therapy, realizing the light irradiation therapy for natural cavities such as the vagina and oral cavity of patients. Moreover, by adopting the solid rod-shaped light guiding structure of the light guiding rod for light guiding, compared with the existing light guiding structure, the light guiding diameter can be significantly reduced, and the comfort of the patient during treatment can be improved, thereby ensuring the compliance of the patient with light therapy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a cross-sectional view of the photodynamic therapy instrument provided in Embodiment 1 of the present utility model (without installing the light guiding cover and the light homogenizing rod);

[0023] Figure 2 It is a front view of the light guiding cover and the light homogenizing rod both installed on the light guiding rod provided in Embodiment 1 of the present utility model;

[0024] Figure 3 It is a top view of the light guiding cover and the light homogenizing rod both installed on the light guiding rod provided in Embodiment 1 of the present utility model;

[0025] Figure 4 It is Figure 2 a cross-sectional view taken along A-A in

[0026] Figure 5 It is Figure 4 an enlarged view at B in

[0027] Figure 6 It is Figure 5 a graph showing the relationship between the light power obtained by the light guiding cover (the light power for treating the cervical part) and the input light power when the α angle in

[0028] Figure 7 It is a front view of the light homogenizing rod installed on the light guiding rod provided in Embodiment 1 of the present utility model;

[0029] Figure 8 Cross-sectional view of the light homogenizing rod provided in the first embodiment of the present utility model mounted on the light guiding rod;

[0030] Figure 9 Trend chart of the change in the light radiant emittance of the lateral light illumination of the light homogenizing rod provided in the first embodiment of the present utility model along the distance from the treatment end of the light guiding rod;

[0031] Figure 10 Cross-sectional view when treating the cervix with the photodynamic therapy instrument provided in the first embodiment of the present utility model;

[0032] Figure 11 Cross-sectional view of the light homogenizing rod provided in the second embodiment of the present utility model mounted on the light guiding rod;

[0033] Figure 12 Schematic diagram of the front end portion of the light guiding rod provided in the third embodiment of the present utility model formed with a light homogenizing rod by mechanical frosting method.

[0034] In the figure: 01 - cervix part, 1 - light guiding rod, 2 - light emitting diode chip, 3 - light source driving circuit, 4 - housing, 5 - gripper, 6 - fan, 7 - heat sink, 8 - touch display screen, 9 - light guiding cover, 10 - light homogenizing rod, 1001 - first light homogenizing section, 1002 - second light homogenizing section, 1003 - third light homogenizing section, 1004 - fourth light homogenizing section, 11 - silica gel protective sleeve. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0036] The purpose of the present utility model is to provide a photodynamic therapy instrument to solve the problems existing in the prior art, which is used for light irradiation treatment of natural cavities such as the vagina and oral cavity of patients. The light guiding diameter is small, which can improve the comfort of patients during treatment, thereby ensuring the compliance of patients' light treatment.

[0037] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Embodiment 1

[0039] As Figure 1As shown in the figure, this embodiment provides a photodynamic therapy instrument, which includes a light guide component and a therapy instrument body. The light guide component includes a light guide rod 1. One end of the light guide rod 1 is the treatment end, and the other end is the connection end. A light-emitting light source is arranged in the therapy instrument body. The light-emitting light source includes a light-emitting diode chip 2 and a light source driving circuit 3. The end face of the light-emitting diode chip 2 is connected to the connection end of the light guide rod 1. The light source driving circuit 3 is used to drive the light-emitting diode chip 2 to emit light, so that the treatment end of the light guide rod 1 can perform light therapy on the natural cavity of the human body. This therapy instrument uses a solid rod-shaped light guide structure of the light guide rod 1 for light guiding. Compared with the existing light guide structures, the light guide diameter can be significantly reduced, and the comfort of the patient during treatment can be improved, thereby ensuring the compliance of the patient's light therapy.

[0040] It should be noted that for the light-emitting light source, those skilled in the art can also select a laser light source according to needs.

[0041] It should be noted that the light guide rod 1 is made of a light guide material such as transparent silica gel or organic plastic, and the diameter range is 1 mm - 16 mm. Specifically, the light guide rod 1 in this embodiment is preferably a PMMA light guide rod 1 with a diameter of 6 mm. The light-emitting surface of the light-emitting diode chip 2 is rectangular or square, and the diagonal dimension is less than 15 mm. The light-emitting diode chip 2 in this embodiment is preferably a square chip with a side length of 3 mm. When the light guide rod 1 is directly coupled to the end face of the light-emitting diode chip 2, the light power output at the treatment end of the light guide rod 1 can reach 1.2 W, and the light output illuminance can reach 4.2 W / cm 2 , with a large light power, especially suitable for photodynamic therapy through the natural cavity of the human body, such as performing light therapy on the cervix, fornix, and vaginal wall through the vagina. Moreover, the light guide diameter is small, which can greatly reduce the pain caused by the large-scale dilation of the vagina required by the existing cervical photodynamic therapy equipment, thereby improving the comfort of the patient during treatment while ensuring the light therapy effect.

[0042] In this embodiment, the therapy instrument body includes a housing 4. The light-emitting diode chip 2 and the light source driving circuit 3 are both arranged in the housing 4. A through hole is arranged on one side of the housing 4 close to the end face of the light-emitting diode chip 2. The light guide rod 1 is fixed to the housing 4 through a clamp 5, and the connection end of the light guide rod 1 passes through the through hole on the housing 4 and is connected to the end face of the light-emitting diode chip 2. The direct connection method between the two reduces the system cost.

[0043] In this embodiment, the therapy instrument body further includes a heat dissipation component. The heat dissipation component is arranged in the housing 4 and is used to dissipate heat from the light-emitting diode chip 2.

[0044] Further, the heat dissipation component includes a fan 6 and a plurality of heat sinks 7. The air outlet end of the fan 6 is arranged vertically downward with respect to the light-emitting diode chip 2, and all the heat sinks 7 are evenly distributed between the fan 6 and the light-emitting diode chip 2; on the housing 4, a plurality of air inlets are provided on one side of the end face close to the gripper 5, which can prevent the cooling air from blowing towards the patient's treatment site; during use, the heat dissipation component can transfer the heat generated by the operation of the light-emitting diode chip 2 to the outside of the therapeutic instrument body through conduction and air cooling.

[0045] In this embodiment, the therapeutic instrument body further includes a touch display screen 8. The touch display screen 8 is arranged on the housing 4 and is electrically connected to the light source drive circuit 3; during use, the light source drive circuit 3 converts the external power supply into a drive current that can drive the light-emitting diode chip 2, and the touch display screen 8 adjusts the level of the drive current through control parameters, thereby realizing the dose control of different light intensities, treatment times, and modulation modes, and having a user interaction function.

[0046] In this embodiment, the light guiding component further includes a light guiding cover 9. The light guiding cover 9 can be arranged at the end of the treatment end of the light guiding rod 1 and is attached to the surface of the human cervix for light treatment.

[0047] In this embodiment, the shape of the end of the treatment end of the light guiding rod 1 is conical, and a conical connection hole is opened in the center of the light guiding cover 9. The light guiding cover 9 can be connected to the end of the treatment end of the light guiding rod 1 through the connection hole.

[0048] Further, the shape of the light guiding cover 9 in this embodiment is preferably bowl-shaped, and the opening of the light guiding cover 9 is shaped like a horn, which is convenient for attaching to the cervix surface; the diameter range of the light guiding cover 9 is 20 mm - 40 mm; the material of the light guiding cover 9 is a flexible light guiding material such as silica gel.

[0049] In this embodiment, the light guiding component further includes a light homogenizing rod 10. The light homogenizing rod 10 can be arranged at the end of the treatment end of the light guiding rod 1 and extend into the human cervical canal for light treatment.

[0050] As Figures 2 - 5 shown, the conical tip of the light guiding rod 1 is connected to the light homogenizing rod 10 for treating the cervical canal and fornix; the conical angle of the light guiding rod 1 is connected to the light guiding cover 9 for treating the cervix and fornix regions.

[0051] It should be noted that by changing the conical angle of the light guiding rod 1 and the ratio of the diameter of the light guiding rod 1 to the diameter of the light homogenizing rod 10, the ratio (light splitting ratio) of the treatment light power in the cervical canal or the cervix to the input light power can be improved; when the diameter of the light guiding rod 1 is 4 mm, when the top conical angle α of the light guiding rod 1 changes from 10 degrees to 80 degrees, the relationship between the light power obtained by the light guiding cover 9 (the light power for treating the cervix part 01) and the input light power is as Figure 6 shown.

[0052] In this embodiment, the light scattering coefficient of the light homogenizing rod 10 gradually increases in the direction away from the treatment end of the light guiding rod 1. The light homogenizing rod 10 can improve the uniformity of light illumination, thereby ensuring the effect of photodynamic therapy.

[0053] Specifically, the material of the light homogenizing rod 10 is a mixture of a flexible material such as silica gel and a light scattering material. Among them, the light scattering material is preferably silica gel doped with 0.01% - 10% silica, organic nano microspheres, polymethyl methacrylate mixed with organic nano microspheres, and sodium hyaluronate mixed with photosensitizer and other soluble biocompatible materials.

[0054] Further, as Figures 7 - 8 shown, the light homogenizing rod 10 in this embodiment includes a first light homogenizing section 1001, a second light homogenizing section 1002, a third light homogenizing section 1003, and a fourth light homogenizing section 1004 that are adhesively bonded in sequence. The end of the fourth light homogenizing section 1004 is a dome structure to avoid mechanical damage to the patient during surgical operations; the above four light homogenizing sections form a lateral scattering structure with 4 levels of different scattering particle concentrations (mass concentrations). Among them, the scattering particle concentration of the first light homogenizing section 1001 is 0.01% - 0.1%, the scattering particle concentration of the second light homogenizing section 1002 is 0.4% - 0.6%, the scattering particle concentration of the third light homogenizing section 1003 is 0.9% - 1.1%, and the scattering particle concentration of the fourth light homogenizing section 1004 is 1.3% - 1.6%. That is, the scattering particle concentration of each section increases by about 0.5%. Its composition is the radiant exitance of the lateral light illumination, and the change trend of the distance along the direction away from the treatment end of the light guiding rod 1 is as Figure 9 shown.

[0055] As Figure 10 shown, when this therapeutic instrument is applied to the treatment of the cervical part 01, the light emitted by the light emitting diode chip 2 is conducted to the treatment end of the light guiding rod 1, and the cervix and fornix parts are covered by the light guiding cover 9, so that light illumination treatment of the cervical surface can be realized. Through the light homogenizing rod 10, light illumination treatment of the cervical canal can also be realized. Moreover, by changing the scattering particle concentration and length of each light homogenizing section, the proportion of the light power of the treatment light in the lateral illumination and axial transmission can be adjusted, thereby improving the irradiance uniformity of the lateral treatment surface and ensuring the effect of photodynamic therapy. At the same time, since the treatment light emitted by the light emitting diode chip 2 in this therapeutic instrument is conducted to the in-cavity treatment site through the light guiding rod 1, the light guiding cover 9, and the light homogenizing rod 10, that is, the light emitting source is far from the in-cavity treatment site, reducing the over-high temperature rise caused by the thermal effect of the light emitting source and avoiding thermal damage to normal tissues.

[0056] Embodiment Two

[0057] As Figure 11As shown in the figure, the difference between this embodiment and the first embodiment is that chamfer structures are provided on each light homogenization section, which facilitates the coaxial alignment of the light homogenization sections of different segments and avoids the step of light radiant emittance caused by the step of the scattering concentration of the light scatterer. At the same time, a silica gel protective sleeve 11 is sleeved outside the light homogenization rod 10, and the silica gel protective sleeve 11 plays a role in assisting in fixing the light homogenization rod 10 and the light guide rod 1.

[0058] Embodiment Three

[0059] As Figure 12 shown in the figure, the difference between this embodiment and the first and second embodiments is that the front end portion of the light guide rod 1 forms a light homogenization rod 10 by means of mechanical frosting. When the diameter of the light guide rod 1 is 6 mm, if the axial length of the light homogenization rod 10 is 20 mm, the uniformity of the lateral illumination can be better than ±10%, and the lateral irradiance is higher than 150 mW / cm².

[0060] Specific examples are used in the present utility model to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A photodynamic therapy device, characterized in that: It includes a light guide component and a therapeutic device body, the light guide component includes a light guide rod, one end of the light guide rod is a treatment end, and the other end is a connecting end; a light source is arranged in the therapeutic device body, and the light source is connected to the connecting end of the light guide rod, so that the treatment end of the light guide rod can perform light treatment on the natural cavity of the human body.

2. The photodynamic therapy device according to claim 1, characterized in that: The light guide rod is a PMMA light guide rod, and the diameter of the light guide rod ranges from 1 mm to 16 mm.

3. The photodynamic therapy device according to claim 2, characterized in that: The light source comprises a light emitting diode chip and a light source driving circuit. The end surface of the light emitting diode chip is connected to the connecting end of the light guide rod. The light source driving circuit is used to drive the light emitting diode chip to emit light.

4. The photodynamic therapy apparatus according to claim 3, characterized in that: The therapeutic device body includes a shell, the light-emitting diode chip and the light source driving circuit are both arranged in the shell, and a through hole is provided on one side of the shell close to the end face of the light-emitting diode chip; the light guide rod is fixed to the shell by a clamp, and the connecting end of the light guide rod is inserted into the through hole on the shell and connected to the end face of the light-emitting diode chip.

5. The photodynamic therapy device according to claim 4, characterized in that: The therapeutic device body also includes a heat dissipation component, which is arranged in the shell and is used to dissipate heat from the light-emitting diode chip; the heat dissipation component includes a fan and a plurality of heat sinks, the air outlet end of the fan is arranged downwardly perpendicular to the light-emitting diode chip, and all the heat sinks are evenly distributed between the fan and the light-emitting diode chip; a plurality of air inlets are arranged on one side of the end face of the shell close to the clamp.

6. The photodynamic therapy apparatus according to claim 4, characterized in that: The therapeutic device body also includes a touch display screen, which is arranged on the shell and is electrically connected to the light source driving circuit.

7. The photodynamic therapy apparatus according to claim 1, characterized in that: The light guide assembly also includes a light guide cover, which is used to be arranged at the treatment end of the light guide rod and attached to the surface of the human cervix to perform light treatment on it.

8. The photodynamic therapy device according to claim 7, characterized in that: A connecting hole is provided at the center of the light guide cover, and the light guide cover can be connected to the treatment end of the light guide rod through the connecting hole.

9. The photodynamic therapy apparatus according to claim 1, characterized in that: The light guide assembly also includes a light homogenizing rod, which is used to be arranged at the treatment end of the light guide rod and extends into the human cervical canal to perform light treatment thereon.

10. The photodynamic therapy device according to claim 9, characterized in that: The light scattering coefficient of the light homogenizing rod gradually increases in a direction away from the treatment end of the light guiding rod.

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