CN219645671U - Endoscope head end assembly and photoacoustic endoscope - Google Patents

Abstract

The utility model discloses an endoscope head end assembly and a photoacoustic endoscope, wherein the endoscope head end assembly comprises a head end seat, an ultrasonic probe and an optical fiber; the inside of the head end seat is provided with an optical fiber trunk channel; the ultrasonic probe is arranged at the far end of the head end seat, two optical fiber branch channels are branched and arranged in the ultrasonic probe towards two inner side directions, and the branch positions are communicated with the optical fiber trunk channels; the optical fibers enter the ultrasonic probe along the optical fiber trunk channel and branch into the two optical fiber branch channels, and two first branch optical fibers positioned at two sides of the interior of the ultrasonic probe are formed. The optical fiber main channel and the optical fiber branch channel are arranged in the head end seat and the ultrasonic probe and used for towing the optical fiber to a preset position for installation, so that the optical fiber is convenient to assemble and fix and the stability after assembly is ensured.

Description

Endoscope head end assembly and photoacoustic endoscope

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an endoscope head end assembly and a photoacoustic endoscope.

Background

The ultrasonic endoscope is an electronic endoscope with ultrasonic diagnosis and treatment functions; an ultrasonic probe is arranged at the far end of an endoscope and is used for carrying out ultrasonic diagnosis on tissues below a body membrane; under the guidance of the ultrasonic image, the puncture needle can extend out of the instrument channel to puncture and biopsy the tissue in the body, so as to obtain the deep lesion information of the digestive tract or the respiratory tract.

The photoacoustic imaging technique irradiates a biological tissue with near infrared pulse laser (photoacoustic excitation light), and generates thermal expansion when the biological tissue absorbs light energy and contraction when the pulse gap releases energy; along with the thermal expansion and contraction process of biological tissues, high-frequency ultrasonic waves are generated when ultrasonic signals emitted by an ultrasonic probe are received, the intensity of the generated ultrasonic waves is determined by the amount of the absorbed light energy of the biological tissues, and ultrasonic waves with different intensities are generated due to different absorption of near infrared light by different tissues; therefore, compared with pure ultrasonic imaging, photoacoustic imaging has advantages in contrast and functionality, and can realize high-resolution, high-contrast and high-sensitivity structural imaging and functional imaging of a tissue body with larger depth.

In the current photoacoustic imaging technology, the stability of the optical fiber is the basis for ensuring stable emission of photoacoustic excitation light, however, when the current optical fiber is installed at the distal end of an endoscope, the problems of lack of traction, unstable assembly and the like generally exist.

Disclosure of Invention

The utility model aims to provide an endoscope head end assembly and a photoacoustic endoscope, and aims to solve the problems that in an existing photoacoustic endoscope, an optical fiber is generally lack of traction and unstable in assembly when an endoscope distal end is installed.

In order to solve the technical problems, the aim of the utility model is realized by the following technical scheme: there is provided an endoscope head assembly comprising:

a head end seat, wherein an optical fiber trunk channel is formed in the head end seat;

the ultrasonic probe is arranged at the far end of the head end seat, two optical fiber branch channels are branched and arranged in the ultrasonic probe towards two inner side directions, and the branch positions are communicated with the optical fiber trunk channels;

the optical fibers enter the ultrasonic probe along the optical fiber main channel and branch into the two optical fiber branch channels, and two first branch optical fibers positioned at two inner sides of the ultrasonic probe are formed.

Further, the two sides of the interior of the ultrasonic probe are respectively provided with an optical window structural member, and the distal ends of the two first branch optical fibers are respectively arranged in the corresponding optical window structural members and guide the photoacoustic excitation light to exit towards the imaging plane of the ultrasonic probe.

Further, the inside of head end seat has seted up the accommodation chamber, the optic fibre trunk passageway runs through from the proximal end to distal end the accommodation chamber, the optic fibre trunk passageway set up in the accommodation chamber is kept away from the inner wall of ultrasonic probe imaging plane one side.

Further, an opening communicated with the accommodating cavity is formed in the outer portion of the head end seat, and a cover plate is arranged on the opening.

Further, the accommodating cavity is arranged on one side of the head end seat, which is biased towards two sides of the ultrasonic probe.

Further, the two optical fiber branch channels are arranged on the inner wall of one side of the ultrasonic probe far away from the imaging plane of the ultrasonic probe.

Further, the lengths of the two fiber optic branch channels are different.

Embodiments of the present utility model also provide a photoacoustic endoscope including an endoscope head end assembly as described above disposed at a distal end of an insertion portion.

The embodiment of the utility model provides an endoscope head end assembly and a photoacoustic endoscope, wherein the endoscope head end assembly comprises a head end seat, an ultrasonic probe and an optical fiber; the inside of the head end seat is provided with an optical fiber trunk channel; the ultrasonic probe is arranged at the far end of the head end seat, two optical fiber branch channels are branched and arranged in the ultrasonic probe towards two inner side directions, and the branch positions are communicated with the optical fiber trunk channels; the optical fibers enter the ultrasonic probe along the optical fiber trunk channel and branch into the two optical fiber branch channels, and two first branch optical fibers positioned at two sides of the interior of the ultrasonic probe are formed. According to the embodiment of the utility model, the optical fiber main channel and the optical fiber branch channel are arranged in the head end seat and the ultrasonic probe and are used for towing the optical fiber to a preset position for installation, so that the optical fiber is convenient to assemble and fix and the stability after assembly is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an endoscope head end assembly provided in an embodiment of the present utility model;

FIG. 2 is a schematic view of a side structure of an endoscope head end assembly provided in an embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of FIG. 2 with the cover plate removed;

fig. 4 is a schematic diagram of distribution of an optical fiber in an ultrasonic probe according to an embodiment of the present utility model;

fig. 5 is a schematic view of an emission angle of photoacoustic excitation light according to an embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of an optical fiber according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a divergence setting of a second optical branch fiber according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of a second optical fiber mounting structure according to an embodiment of the present utility model;

FIG. 9 is an exploded view of FIG. 8;

FIG. 10 is a schematic top view of an endoscope head end assembly provided in an embodiment of the present utility model;

FIG. 11 is a schematic cross-sectional view of the G-G view of FIG. 10;

FIG. 12 is a schematic cross-sectional view of the H-H view of FIG. 11;

fig. 13 is an enlarged schematic view of the portion a in fig. 12.

The figure identifies the description:

1. a head end seat; 11. a receiving chamber; 111. an optical fiber backbone channel; 112. a cover plate;

2. an ultrasonic probe; 21. a light window structure; 211. an arc-shaped block; 2111. an inner bore; 212. an arc-shaped transparent light window; 22. a probe housing; 23. an ultrasonic transducer; 24. an acoustic lens;

3. an optical fiber; 31. a first branch optical fiber; 32. and a second branch optical fiber.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Referring to fig. 1-4, an embodiment of the present utility model provides an endoscope head end assembly, including a head end seat 1, an ultrasonic probe 2, and an optical fiber 3;

the inside of the head end seat 1 is provided with an optical fiber trunk channel 111;

the ultrasonic probe 2 is arranged at the far end of the head end seat 1, two optical fiber branch channels are branched and arranged in the ultrasonic probe 2 towards two inner sides, and the branch positions are communicated with the optical fiber trunk channel 111;

the optical fiber 3 enters the ultrasonic probe 2 along the optical fiber trunk channel 111 and branches into two optical fiber branch channels, and two first branch optical fibers 31 positioned at two sides of the interior of the ultrasonic probe 2 are formed;

wherein, the two sides of the interior of the ultrasonic probe 2 are respectively provided with an optical window structural member 21, and two first branch optical fibers 31 are respectively installed in the corresponding optical window structural members 21 to guide the photoacoustic excitation light to exit towards the imaging plane of the ultrasonic probe 2.

In this embodiment, an optical fiber trunk channel is disposed in a head end seat, two optical fiber branch channels are disposed in an ultrasonic probe, an optical fiber 3 is branched into two first branch optical fibers 31 after entering the ultrasonic probe 2 via the optical fiber trunk channel 111, the two first branch optical fibers 31 are respectively pulled to two sides of the interior of the ultrasonic probe 2 through the two optical fiber branch channels and are installed in two optical window structural members 21, and the optical fiber 3 is limited and guided through the disposed channels, so that the optical fiber is pulled to a predetermined position for installation, and the optical fiber 3 is more convenient to assemble and has better stability after assembly.

In some embodiments, the head end seat 1 has a receiving cavity 11 formed therein, and the optical fiber trunk channel 111 extends through the receiving cavity 11 from the proximal end to the distal end, and the optical fiber trunk channel 111 is disposed on an inner wall (which may be referred to as a bottom wall) of the receiving cavity 11 on a side far away from an imaging plane of the ultrasound probe.

In some embodiments, the branches of the two optical fiber branch channels are arranged on the inner wall of the ultrasonic probe 2 far away from the imaging plane of the ultrasonic probe, and the branches continue to extend along the inner wall or extend along the left and right side walls of the interior of the ultrasonic probe 2.

In some embodiments, the optical fiber main channel is biased to one side, and the structures such as the optical window structural members at two sides of the ultrasonic probe are symmetrically arranged, so that the lengths of the two optical fiber branch channels are different.

In some embodiments, the optical fiber 3 may be fixed in the optical fiber trunk channel 111 and the optical fiber branch channel by means of glue, and the distal end of the optical fiber 3 may be limitedly installed in the optical window structural member 21 by means of insertion to ensure stability of the optical fiber 3, so as to ensure assembly stability of the optical fiber 3 at a given position.

Based on the optical fiber 3 after being assembled and fixed, photoacoustic excitation light can be stably emitted, and the photoacoustic excitation light emitted by the two first branch optical fibers 31 is respectively refracted by the two optical window structural members 21 towards the imaging plane (namely, the central axis and the dotted line in reference to fig. 5) of the ultrasonic probe 2 to form a laser light field (shown in reference to fig. 5) which is bidirectionally covered on the imaging plane, so that the energy density on the imaging plane is effectively improved, and the photoacoustic imaging effect is improved.

In some embodiments, the outside of the head end seat 1 is provided with an opening communicating with the accommodating cavity 11, and the opening may be provided at a position adjacent to one side of the inner bottom wall of the head end seat 1, that is, adjacent to the optical fiber trunk channel 111; a cover plate 112 is arranged on the opening; the cover plate 112 can be mounted outside the head end seat 1 by adopting screws to seal the opening, and the laser fiber can be mounted and maintained at the opening by detaching the cover plate 112 to expose the fiber trunk channel 111 in the accommodating cavity 11.

In some other embodiments, the cover plate 112 may act as a cover plate for the entire interior space of the head end seat 1, with various components within the cover plate 112 visible open for maintenance.

In some embodiments, the head end base 1 is made of plastic material, has good insulation effect and is used as a carrier for multifunctional integration of the photoacoustic endoscope.

Referring to fig. 6 and 7, in one embodiment, the distal end of the first branch optical fiber 31 is provided with a plurality of second branch optical fibers 32 in a fan-shaped and divergent manner toward the outside of the optical window structure 21; the distal ends of the plurality of second branch optical fibers 32 are inserted into the inner holes 2111 (see fig. 9) formed in the corresponding optical window structural member 21 in a one-to-one correspondence.

In this embodiment, the lengths of the plurality of second branch optical fibers 32 are approximately the same, the angles of the plurality of second branch optical fibers 32 are uniformly distributed, and the plurality of second branch optical fibers 32 are in a fan-shaped divergent arrangement, so that the emergent angle of the emitted photoacoustic excitation light is larger, and the emitted photoacoustic excitation light can be outwards diffused to form a laser light field and cover the receiving range of the ultrasonic probe 2; the plurality of second branch optical fibers 32 are inserted in the inner holes 2111 in a one-to-one correspondence manner, so that the stability of assembly can be maintained.

Referring to fig. 8-12, in some embodiments of the light window structure 21, the light window structure 21 includes an arc block 211 and an arc transparent light window 212, the outer wall of the arc block 211 facing the inner side of the ultrasonic probe 2 is attached to the inner side of the ultrasonic probe 2, and the arc transparent light window 212 is attached to the outer arc surface of the arc block 211; the inner hole 2111 is formed on the arc block 211 and penetrates through an inner arc surface (laser incident surface) and an outer arc surface (laser emitting surface) of the arc block 211, and the second branch optical fiber 32 is inserted into the corresponding inner hole 2111 and abuts against the arc transparent optical window 212.

In this embodiment, the outer wall of the side of the arc block 211 facing the inside of the ultrasonic probe 2 may be fixedly attached to the side of the inside of the ultrasonic probe 2 by using adhesive, the arc block 211 is used for limiting the plurality of second branch optical fibers 32 which are in fan-shaped divergent arrangement, the arc block 211 is provided with a plurality of inner holes 2111 penetrating through the inner arc surface and the outer arc surface of the arc block 211, the plurality of inner holes 2111 are in fan-shaped distribution and are in one-to-one adaptation with the plurality of second branch optical fibers 32, and the plurality of second branch optical fibers 32 are in one-to-one correspondence and are inserted in the plurality of inner holes 2111, so as to ensure the assembly stability of the plurality of second branch optical fibers 32.

In this embodiment, the arc-shaped transparent optical window 212 is made of a completely transparent nonmetallic material, the inner arc surface of the arc-shaped transparent optical window 212 can be fixedly attached to the outer arc surface of the arc-shaped block 211 by using adhesive, the inner arc surface of the arc-shaped transparent optical window 212 is inclined towards the outer wall of the corresponding arc-shaped block 211 (refer to fig. 13), and the most distal ends of the multiple bundles of second branch optical fibers 32 are abutted against the inner arc surface of the arc-shaped transparent optical window 212; in this way, the photoacoustic excitation light emitted from the most distal end of the plurality of second branch optical fibers 32 is refracted through the intrados of the arc-shaped transparent optical window 212 and then directed toward the imaging plane of the ultrasound probe 2.

Specifically, the cross section of the arc-shaped transparent light window 212 is trapezoidal, and the photoacoustic excitation light can approach the imaging plane of the ultrasonic probe 2 when passing through the plane of the outer arc after passing through the inner cambered surface of the arc-shaped transparent light window 212, so that the radiation range of the photoacoustic excitation light is increased, the near-field blind area of photoacoustic imaging is reduced, the energy density of the photoacoustic excitation light in the imaging range is increased, and the photoacoustic signal intensity in photoacoustic imaging can be increased.

In some embodiments, the distal-most end of the second branch optical fiber 32 is a cured stiff optical fiber segment; the second branch optical fiber 32 can be better inserted into the inner hole 2111, and the stability of the second branch optical fiber 32 inserted into the inner hole 2111 is improved.

In an embodiment, the included angle α of the two outermost second branch fibers 32 located in the fan-shaped distribution of the plurality of second branch fibers 32 is larger than the scanning angle of the ultrasonic probe 2; the laser light field formed by the photoacoustic excitation light can be ensured to better cover the imaging plane of the ultrasonic probe 2, and the ultrasonic probe 2 can be ensured to receive the acoustic signal returned after the photoacoustic excitation light modulation.

Referring to fig. 10-12, in one embodiment, the ultrasound probe 2 includes a probe housing 22, an ultrasound transducer 23, and an acoustic lens 24; the probe shell 22 is arranged at the far end of the head end seat 1; the two optical window structural members 21 are respectively arranged on the inner walls of the left side and the right side of the probe shell 22; the ultrasonic transducer 23 is arranged inside the probe shell 22 and is positioned between the two optical window structural members 21; the acoustic lens 24 is disposed on the surface of the probe housing 22 and between the two optical window structures 21, and covers the emitting surface of the ultrasonic transducer 23.

In this embodiment, the probe housing 22 and the distal end of the head end seat 1 are integrally disposed, the probe housing 22 is in a U-shaped groove structure, the left and right sides of the probe housing 22 are arc-shaped, two arc-shaped blocks 211 are symmetrically disposed, the two arc-shaped blocks 211 are fixedly attached to the left and right sides of the interior of the probe housing 22 in an adhesive manner, and the arc-shaped top edges of the arc-shaped blocks 211 correspond to the arc-shaped top edges of the inner side of the probe housing 22. An ultrasonic transducer 23 is mounted in the slot of the probe housing 22 between the two arcuate blocks 211, the ultrasonic transducer 23 being adapted to transmit and receive ultrasonic signals. The acoustic lens 24 is made of non-metal materials and can be in direct contact with a human body, the acoustic lens 24 is arc-shaped, the arc edges on the left side and the right side of the acoustic lens 24 are respectively fixedly attached to the inner sides of the two arc blocks 211 in an adhesive mode, and the installed acoustic lens 24 and the probe shell 22 form an internal cavity so that the ultrasonic transducer 23 is sealed in the cavity.

The embodiment of the utility model provides a photoacoustic endoscope, which comprises a light guide part, a universal cable, an operation part and an insertion part which are sequentially communicated, and further comprises an endoscope head end assembly arranged at the distal end of the insertion part.

In this embodiment, the photoacoustic excitation light is emitted by the external photoacoustic excitation light device, and is transmitted by one optical fiber 3 through the light guide part, the universal cable, the operation part and the insertion part, reaches the probe housing 22 from the head end part side of the distal end of the insertion part, and can be divided into two bundles of first branch optical fibers 31 in the probe housing 22, and each bundle is subdivided into second branch optical fibers 32; the distal ends of the second branch optical fibers 32 are provided with arc-shaped transparent optical windows 212, so that the emitting path of each second branch optical fiber 32 can be changed and a better laser light field can be formed, and the laser light fields on two sides of the probe shell 22 can cover the imaging positions (two-dimensional image planes) detected by the ultrasonic transducers 23.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (8)

1. An endoscope head assembly, comprising:

a head end seat, wherein an optical fiber trunk channel is formed in the head end seat;

the ultrasonic probe is arranged at the far end of the head end seat, two optical fiber branch channels are branched and arranged in the ultrasonic probe towards two inner side directions, and the branch positions are communicated with the optical fiber trunk channels;

the optical fibers enter the ultrasonic probe along the optical fiber main channel and branch into the two optical fiber branch channels, and two first branch optical fibers positioned at two inner sides of the ultrasonic probe are formed.

2. An endoscope head assembly as defined in claim 1 wherein:

the ultrasonic probe comprises an ultrasonic probe body, wherein two optical window structural members are arranged on two sides of the interior of the ultrasonic probe body, and the distal ends of two first branch optical fibers are respectively arranged in the optical window structural members and guide photoacoustic excitation light to exit towards an imaging plane of the ultrasonic probe body.

3. The endoscope head assembly of any of claims 1-2 wherein:

the inside of head end seat has seted up the accommodation chamber, optic fibre trunk passageway from the proximal end to the distal end runs through the accommodation chamber, the optic fibre trunk passageway set up in the inner wall of the one side of accommodation chamber keeping away from the ultrasonic probe imaging plane.

4. An endoscope head assembly as defined in claim 3 wherein:

the outside of head end seat has offered the intercommunication the opening of holding chamber, be equipped with the apron on the opening.

5. An endoscope head assembly as defined in claim 3 wherein:

the accommodating cavity is arranged on one side of the head end seat, which is biased towards the two sides of the ultrasonic probe.

6. An endoscope head assembly as defined in claim 2 wherein:

the two optical fiber branch channels are arranged on the inner wall of one side of the ultrasonic probe far away from the imaging plane of the ultrasonic probe.

7. An endoscope head assembly as defined in claim 6 wherein:

the two fiber branch channels are different in length.

8. A photoacoustic endoscope, characterized by: an endoscope head assembly as defined in any one of claims 1 to 7 disposed at a distal end of the insertion portion.