Ultrasonic treatment head and ultrasonic treatment instrument for superficial tissue treatment

Abstract

The utility model belongs to the technical field of medical instruments, and provides an ultrasonic treatment head and an ultrasonic treatment instrument for superficial tissue treatment, the ultrasonic treatment head comprises a shell, an ultrasonic transducer, a probe assembly and a membrane bag, the membrane bag is connected to one side of the shell in a sealing mode so that a cavity structure with an opening in the upper end is formed in the shell, and the ultrasonic transducer is arranged in the cavity structure. The ultrasonic transducer is in a spherical segment shape and installed in the shell, and a through hole is formed in the ultrasonic transducer. The probe assembly comprises a guide cylinder and an image probe, the guide cylinder is connected with the ultrasonic transducer through the through hole, a first cavity is formed among the inner wall of the guide cylinder, the ultrasonic transducer and the membrane bag, the image probe is installed in the first cavity, and the diameter of the image probe is smaller than that of the guide cylinder, so that the image probe can move in the first cavity; and the first cavity is communicated with the external environment atmosphere. According to the ultrasonic treatment head, ultrasonic treatment can be carried out on superficial tissues, and meanwhile, the influence of ultrasonic liquid medium bubbles in a sealed cavity of an existing ultrasonic treatment head on ultrasonic energy and image quality is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an ultrasonic treatment head and an ultrasonic treatment apparatus for superficial tissue treatment. Background Art

[0002] Focused ultrasound utilizes an ultrasonic transducer to focus ultrasonic energy from outside the body into human tissue. Through the thermal and cavitation effects of focused ultrasound, irreversible coagulative necrosis occurs in the target tissue, achieving the goal of treating diseased tissue. Focused ultrasound therapy is currently used for tissue ablation in various locations, including the head, neck, abdomen, chest, and limbs.

[0003] Different frequencies, focal lengths, shapes, and acoustic emission directions are required for different tissue locations, depending on their anatomical structure and tissue depth. For superficial tissues such as the thyroid, breast, ribs, lymph nodes, blood vessels, and nerves, due to their shallow tissue depth and specialized location, a high-frequency, short-focal-length, small-focal-zone, and small-sized ultrasound treatment head is required. Ultrasonic energy is typically transmitted from a top-down approach. Ultrasonic treatment heads that utilize a top-down approach require a retractable membrane capsule at the front end to contain the ultrasound-conducting medium. This capsule forms a sealed cavity between the capsule and the ultrasound transducer. As the sealed cavity is compressed, the internal pressure increases, subjecting the thin-walled ultrasound transducer to external pressure and causing changes in the transducer's impedance characteristics. Furthermore, because the cavity is sealed, bubbles in the dielectric fluid can easily lodge at the top of the transducer and the tip of an imaging probe (such as a B-ultrasound probe). Ultrasound is significantly attenuated within bubbles, and energy is reflected from the bubble surface, affecting the propagation of ultrasound energy and the imaging quality of the imaging probe.

[0004] Currently, researchers in this field have developed a variety of ultrasonic devices for superficial tissue treatment. For example, patent application publication number CN102580261A discloses a focused ultrasonic transducer device suitable for superficial tumor treatment. Its design prevents interference between the pressure ceramic wafer and the B-ultrasound probe, and the piezoelectric ceramic wafer employed features a spherical, self-focusing design, minimizing ultrasonic attenuation caused by components such as lenses. However, this focused ultrasonic transducer device fails to address issues such as the significant attenuation of ultrasound within bubbles, which affects ultrasonic energy propagation and imaging quality. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an ultrasonic treatment head and an ultrasonic treatment device for superficial tissue treatment, so as to solve the problems that the existing ultrasonic equipment for superficial tissue treatment cannot solve, such as the large attenuation of ultrasound in bubbles and the formation of energy reflection on the surface of bubbles, which affects the propagation of ultrasonic energy and the imaging quality of the imaging probe.

[0006] To achieve the above-mentioned and related purposes, the present invention provides the following technical solutions:

[0007] The first aspect of the present invention provides an ultrasonic treatment head for superficial tissue treatment, comprising a housing, an ultrasonic transducer, a probe assembly, and a membrane capsule. The membrane capsule is sealed and connected to one side of the housing to form a cavity structure with an upper end open. The ultrasonic transducer is spherical and is installed in the housing near the membrane capsule. A through hole is opened on the ultrasonic transducer.

[0008] The probe assembly includes a guide tube and an imaging probe. The guide tube matches the through-hole structure and is connected to the ultrasonic transducer through the through-hole. A first cavity is formed between the inner wall of the guide tube, the ultrasonic transducer, and the membrane capsule. The imaging probe is installed in the first cavity, and the diameter of the imaging probe is smaller than that of the guide tube so that the imaging probe can move in the first cavity.

[0009] The first cavity is in communication with the external atmosphere.

[0010] Furthermore, the ultrasonic therapy head also includes a liquid medium, and the liquid medium flows in the first cavity.

[0011] Furthermore, the size parameters of the ultrasonic transducer satisfy the following relationship (I):

[0012] H<R(Ⅰ),

[0013] In formula (I), R represents the radius of the spherical segment of the ultrasonic transducer, in millimeters; H represents the height of the spherical segment of the ultrasonic transducer, in millimeters.

[0014] Furthermore, the size parameters of the ultrasonic transducer satisfy the following relationship (II):

[0015] L=1 / 2D-2 / 3D (Ⅱ),

[0016] In formula (II), L represents the distance from the bottom surface of the ultrasonic transducer spherical segment to the sphere center, in millimeters; D represents the diameter of the bottom surface of the ultrasonic transducer spherical cap, in millimeters.

[0017] Furthermore, the size parameters of the ultrasonic transducer satisfy the following relationship (III):

[0018] S1<S2, and S2 / S≥1 / 2 (III),

[0019] In formula (III), S represents the area of ​​the ultrasonic transducer cap, in square millimeters; S1 represents the area of ​​the through hole, in square millimeters; and S2 represents the sum of the areas of the through hole and the ultrasonic transducer, in square millimeters.

[0020] Furthermore, the diameter of the bottom surface of the spherical surface ranges from 30 mm to 100 mm.

[0021] Furthermore, the frequency of the ultrasonic transducer is 2 MHz to 10 MHz.

[0022] Furthermore, a second cavity is formed between the outer wall of the guide tube, the shell and the ultrasonic transducer.

[0023] Furthermore, the second cavity is filled with air.

[0024] A second aspect of the present invention provides an ultrasonic therapeutic apparatus, comprising the ultrasonic therapeutic head mentioned above.

[0025] The beneficial technical effects of the present utility model are:

[0026] A first cavity allowing liquid medium and air to pass through is provided between the guide tube and the imaging probe of the ultrasonic treatment head of the present invention, and the first cavity is connected to the atmosphere. When the ultrasonic treatment head of the present invention is used, the ultrasonic transducer is in a state of emitting sound energy from top to bottom. The bubbles in the liquid medium between the membrane sac and the spherical crown emitting surface of the ultrasonic transducer will rise into the first cavity between the imaging probe and the guide tube, and will not stay on the top emitting surface of the ultrasonic transducer and the top surface of the imaging probe, thereby avoiding the bubbles from having an adverse effect on the sound energy and image quality.

[0027] Secondly, during use, if the ultrasonic treatment head of the present application is displaced, the pressure between the membrane sac and the emitting surface of the ultrasonic transducer changes due to the change in the shape of the membrane sac. At this time, the liquid level of the liquid medium changes in the first cavity, and the increased pressure is released through the first cavity, so that no external pressure is applied to the emitting surface of the ultrasonic transducer, thereby avoiding changes in the impedance characteristics of the ultrasonic transducer due to pressure.

[0028] The utility model can realize ultrasonic treatment of superficial tissues and solve the problem that the ultrasonic energy and image quality are affected by bubbles of ultrasonic liquid medium in the sealed cavity of the existing ultrasonic treatment head.

[0029] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, serving to explain the principles of the present application. It is obvious that the drawings described below are merely some embodiments of the present application, and it is possible for a person of ordinary skill in the art to derive other drawings based on these drawings without inventive effort. In the accompanying drawings:

[0031] Figure 1 This is a cross-sectional view of the ultrasonic therapy head of this application;

[0032] Figure 2This is an exemplary dimension marking diagram of an ultrasonic transducer of the present application;

[0033] Figure 3 This is another exemplary dimension marking diagram of an ultrasonic transducer of the present application;

[0034] Figure 4 This is a schematic diagram of an exemplary ultrasonic transducer structure of the present application;

[0035] Figure 5 This is another exemplary schematic diagram of the ultrasonic transducer structure of the present application.

[0036] Reference numerals

[0037] 1: Shell; 2: Guide tube; 3: Imaging probe; 4: First cavity; 5: Ultrasonic transducer; 6: Membrane capsule;

[0038] 7: second cavity; 8: liquid medium; 9: through hole. DETAILED DESCRIPTION

[0039] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended solely to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0040] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0041] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "front", "rear", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the figure, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the figures are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meaning of the above terms can be understood according to the specific circumstances.

[0042] like Figure 1As shown, the utility model provides an ultrasonic treatment head for superficial tissue treatment, comprising a housing 1, an ultrasonic transducer 5, a probe assembly and a membrane capsule 6. The membrane capsule 6 is sealed and connected to one side of the housing 1 so that the housing 1 forms a cavity structure with an upper end open. The ultrasonic transducer 5 is in a spherical segment shape and is installed in the housing 1 close to the membrane capsule 6. A through hole 9 is opened on the ultrasonic transducer 5.

[0043] The probe assembly includes a guide tube 2 and an imaging probe 3. The guide tube 3 matches the structure of the through hole 9 and is connected to the ultrasonic transducer 5 through the through hole 9. A first cavity 4 is formed between the inner wall of the guide tube 2, the ultrasonic transducer 5 and the membrane capsule 6. The imaging probe 3 is installed in the first cavity 4. The diameter of the imaging probe 3 is smaller than that of the guide tube 2, so that the imaging probe 3 can move in the first cavity 4.

[0044] The first cavity 4 is in communication with the external atmosphere.

[0045] In some embodiments, the ultrasonic therapy head of the present application further includes a liquid medium 8 , which flows in the first cavity 4 .

[0046] In some embodiments, a first cavity 4 allowing liquid medium 8 and air to pass through is provided between the guide tube 2 and the imaging probe 3 of the ultrasonic treatment head of the present application, and the first cavity 4 is connected to the atmosphere. When the ultrasonic treatment head of the present application is used, the ultrasonic transducer 5 is in a state of emitting sound energy from top to bottom, and the bubbles in the liquid medium 8 between the membrane sac 6 and the spherical crown emitting surface of the ultrasonic transducer 5 will rise into the first cavity 4 between the imaging probe 3 and the guide tube 2, and will not stay on the top emitting surface of the ultrasonic transducer 5 and the top surface of the imaging probe 3, thereby avoiding the bubbles from having adverse effects on the sound energy and image quality.

[0047] Furthermore, during use, if the ultrasonic treatment head of the present application is displaced, especially when it moves downward, the shape of the membrane capsule 6 becomes smaller, and the pressure between the membrane capsule 6 and the emitting surface of the ultrasonic transducer 5 increases due to the change in the shape of the membrane capsule 6. At this time, the liquid level of the liquid medium 8 changes in the first cavity 4, and the increased pressure is released through the first cavity 4, so that no external pressure is applied to the emitting surface of the ultrasonic transducer 5, thereby avoiding changes in the impedance characteristics of the ultrasonic transducer 5 due to pressure.

[0048] In some embodiments, the imaging probe 3 of the present application may be a B-ultrasound probe, and the B-ultrasound probe may be a convex array probe or a linear array probe.

[0049] In some embodiments, as Figure 4 and Figure 5 As shown, the through hole 9 of the present application can be in various shapes, such as a circle or a rounded rectangle. The guide cylinder 2 can be in the shape of a cylinder or a square cylinder according to the shape of the through hole 9.

[0050] In some embodiments, as Figure 2 and Figure 3 As shown, the size parameters of the ultrasonic transducer of the present application satisfy the following equations (I) to (III):

[0051] H<R(Ⅰ);

[0052] L=1 / 2D-2 / 3D (Ⅱ);

[0053] S1<S2, and S2 / S≥1 / 2 (III),

[0054] In formula (I), R represents the radius of the spherical segment of the ultrasonic transducer, in millimeters; H represents the height of the spherical segment of the ultrasonic transducer, in millimeters;

[0055] In formula (II), L represents the distance from the bottom surface of the ultrasonic transducer spherical segment to the sphere center, in millimeters; D represents the diameter of the bottom surface of the ultrasonic transducer spherical cap, in millimeters;

[0056] In formula (III), S represents the area of ​​the ultrasonic transducer cap, in square millimeters; S1 represents the area of ​​the through hole, in square millimeters; and S2 represents the sum of the areas of the through hole and the ultrasonic transducer, in square millimeters.

[0057] The spherical cap area of ​​the ultrasonic transducer 5 of the present application is calculated according to the following formula: S=2πRH.

[0058] In some embodiments, the present application defines the shape and size of the ultrasonic transducer 5 to ensure the focal shape and acoustic energy of the ultrasonic therapy head.

[0059] In some embodiments, the diameter of the spherical base ranges from 30 mm to 100 mm. The frequency of the ultrasonic transducer 5 ranges from 2 MHz to 10 MHz. The acoustic energy of the ultrasonic treatment head of the present application can provide superficial tissue ultrasonic treatment targeting the anatomical structure, tissue depth, and location of superficial tissues such as the thyroid, breast, ribs, lymph nodes, blood vessels, and nerves.

[0060] In some embodiments, a second cavity 7 is provided between the guide cylinder 2 and the housing 1. The second cavity 7 is filled with air. The air layer between the guide cylinder 2 and the housing 1 of the present application facilitates the release of increased pressure when the liquid level of the liquid medium 8 changes in the first cavity 4.

[0061] The utility model also provides an ultrasonic therapeutic apparatus, comprising the ultrasonic therapeutic head.

[0062] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, any equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed herein shall be covered by the claims of the present invention.

Claims

1. An ultrasonic treatment head for superficial tissue treatment, comprising a housing, an ultrasonic transducer, a probe assembly and a membrane capsule, characterized in that: The membrane capsule is sealed and connected to one side of the shell to form a cavity structure with an upper end open on the shell. The ultrasonic transducer is in a spherical shape and is installed in the shell close to the membrane capsule. A through hole is opened on the ultrasonic transducer. The probe assembly includes a guide tube and an imaging probe. The guide tube matches the through-hole structure and is connected to the ultrasonic transducer through the through-hole. A first cavity is formed between the inner wall of the guide tube, the ultrasonic transducer, and the membrane capsule. The imaging probe is installed in the first cavity, and the diameter of the imaging probe is smaller than the diameter of the guide tube, so that the imaging probe can move in the first cavity. The first cavity is in communication with the external atmosphere.

2. The ultrasonic therapy head according to claim 1, characterized in that: The ultrasonic therapy head further includes a liquid medium, and the liquid medium flows in the first cavity.

3. The ultrasonic treatment head according to claim 1, characterized in that: The size parameters of the ultrasonic transducer satisfy the following relationship (I): H<R(Ⅰ), In formula (I), R represents the radius of the spherical segment of the ultrasonic transducer, in millimeters; H represents the height of the spherical segment of the ultrasonic transducer, in millimeters.

4. The ultrasonic treatment head according to claim 1, characterized in that: The size parameters of the ultrasonic transducer satisfy the following relationship (II): L= （Ⅱ）， In formula (II), L represents the distance from the bottom surface of the ultrasonic transducer spherical segment to the sphere center, in millimeters; D represents the diameter of the bottom surface of the ultrasonic transducer spherical cap, in millimeters.

5. The ultrasonic treatment head according to claim 1, characterized in that: The size parameters of the ultrasonic transducer satisfy the following relationship (III): S1<S2, and (III), In formula (III), S represents the spherical cap area of ​​the ultrasonic transducer, in square millimeters; S1 represents the area of ​​the through hole, in square millimeters; and S2 represents the sum of the areas of the through hole and the ultrasonic transducer, in square millimeters.

6. The ultrasonic treatment head according to claim 4, characterized in that: The diameter of the bottom surface of the spherical cap ranges from 30 mm to 100 mm.

7. The ultrasonic therapy head according to claim 1, characterized in that: The frequency of the ultrasonic transducer is 2 MHz to 10 MHz.

8. The ultrasonic treatment head according to claim 1, characterized in that: A second cavity is formed between the outer wall of the guide cylinder, the shell and the ultrasonic transducer.

9. The ultrasonic treatment head according to claim 8, characterized in that: The second cavity is filled with air.

10. An ultrasonic therapeutic apparatus, characterized in that: The ultrasonic therapy head comprises the ultrasonic therapy head according to any one of claims 1 to 9.

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