Device for locating body cavity tissue

Abstract

The present invention relates to the field of medical device technology, and provides a device for locating body cavity tissue, comprising a catheter assembly, a balloon body, and a light-emitting assembly. The catheter assembly has a lumen, the distal end of the catheter assembly has a first through hole, and the balloon body is disposed at the distal end of the catheter assembly. The light-emitting assembly comprises a controller and an optical fiber, the input end of the optical fiber is connected to the controller, the output end of the optical fiber is disposed in the lumen, the input end of the optical fiber is provided with a light-emitting section on the side of the balloon body away from the distal end of the catheter assembly, and the light-emitting section extends along the length of the catheter assembly. The light emitted by the controller is transmitted to the light-emitting section through the input end of the optical fiber and is emitted through the catheter assembly. After the balloon body is expanded, the catheter assembly and the balloon body move as a whole to achieve positioning in the surgical area, and the light-emitting section is aligned with the surgical area to facilitate identification of the surgical area. The optical fiber has a small outer diameter and the catheter assembly has a small cross-sectional area, which facilitates the smooth passage of the catheter assembly in the human body.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a device for locating body cavity tissue. Background Art

[0002] Combine Figure 1 The prostate encloses a portion of the urethra. The prostate continues to enlarge throughout life. In some men, prostate enlargement causes the inner region of the prostate to compress the urethra, increasing resistance to urine flow from the bladder through the area of ​​the urethra surrounded by the prostate. Consequently, the bladder must exert greater pressure to force urine through the increased urethral resistance, causing the muscular wall of the bladder to remodel and become stiffer. This increased urethral resistance, increased urine flow firmness, and bladder wall hypertrophy can lead to various lower urinary tract symptoms (LUTS), which can significantly reduce a patient's quality of life. These symptoms include a weak or intermittent urine stream during urination, straining during urination, hesitation before starting urination, a feeling that the bladder is not completely empty even after urination, dribbling or leaking urine at the end of urination, increased urinary frequency, especially at night, and urgency.

[0003] Existing prostate surgery involves removing the diseased, hyperplastic portion of the prostate to reduce urethral resistance. However, due to the close anatomical relationship between the prostate and urethra, the urethra, enveloped by the prostate, is difficult to identify. This can easily cut into the urethra during prostate removal, resulting in the inability to urinate spontaneously during the 3-5 day recovery period after surgery, forcing patients to use a urinary catheter to assist urination. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for locating body cavity tissue, aiming to solve the technical problem that it is difficult to identify the surgical area during existing surgery.

[0005] The present application provides a device for locating body cavity tissue, the device comprising:

[0006] A catheter assembly, wherein the catheter assembly has a lumen, and a distal end of the catheter assembly has a first through hole, wherein the first through hole is in communication with the lumen;

[0007] a balloon body, the balloon body being disposed at the distal end of the catheter assembly and communicating with the first through hole;

[0008] A light-emitting component includes a controller and an optical fiber, the input end of the optical fiber is connected to the controller, the output end of the optical fiber is arranged in the tube cavity, the output end of the optical fiber is located on the side of the balloon body away from the distal end of the catheter assembly, and a light-emitting section is provided, and the light-emitting section extends along the length direction of the catheter assembly; the light emitted by the controller is transmitted to the light-emitting section through the input end of the optical fiber and is emitted through the catheter assembly.

[0009] In one embodiment, the outer diameter of the light-emitting section gradually decreases in a direction away from the input end of the optical fiber.

[0010] In one embodiment, the lumen includes a balloon channel, an optical path channel and a drainage channel that are independent of each other, the distal end of the balloon channel is connected to the first through hole, the optical fiber is arranged in the optical path channel, and the drainage channel is used to allow liquid to flow from the distal end of the catheter assembly to the proximal end of the catheter assembly.

[0011] In one embodiment, in the cross section of the catheter assembly, the optical path is located in the middle of the lumen, and the light-emitting section is linearly extended along the length direction of the optical path.

[0012] In one embodiment, in the cross section of the catheter assembly, the optical path channel is annularly arranged along the circumference of the tube cavity, and the light output section is spirally wound in the optical path channel.

[0013] In one embodiment, the catheter assembly includes a first light transparent tube, a third light transparent tube, and a second light transparent tube nested in sequence from the outside to the inside, the balloon channel is formed between the first light transparent tube and the third light transparent tube, the drainage channel is formed between the third light transparent tube and the second light transparent tube, and the interior of the second light transparent tube forms the light path channel.

[0014] In one embodiment, the catheter assembly is integrally injection molded with the optical fiber.

[0015] In one embodiment, the controller controls the light emitting section to emit laser.

[0016] In one embodiment, the input end of the optical fiber extends out of the catheter assembly and is provided with a first connector, and the controller is provided with a second connector detachably connected to the first connector.

[0017] In one embodiment, the controller includes a shell, a light source generator and a control board. The shell is located outside the first light-transmitting tube, the control board and the light source generator are installed inside the shell, the light source generator is connected to the input end of the optical fiber, and the control board is used to control the light source generator to generate light.

[0018] In one embodiment, the controller further includes a power adjustment component, which is electrically connected to the control board and is used to adjust the optical power of the light source generator.

[0019] In one embodiment, the light source generator includes lamp beads of multiple colors, and the controller also includes a color adjustment component, which is electrically connected to the control board. The color adjustment component is used to switch the multiple lamp beads so that the light source generator generates light of different colors.

[0020] In one embodiment, the device for locating in-body cavity tissue further includes a metal sensor, which includes a metal sensing coil and a signal converter. The signal converter is integrated into the controller, and the metal sensing coil is located on the side of the light emitting section away from the balloon. The metal sensing coil is electrically connected to the signal converter via a wire.

[0021] In one embodiment, the device for locating in-vivo cavity tissue further includes a spectral measurement unit. The light emitted by the light emitting segment is reflected by an obstruction to form an echo. The light emitting segment receives the echo and transmits the echo to the spectral measurement unit. The spectral measurement unit is used to analyze the phase delay and intensity attenuation of the echo.

[0022] In one embodiment, the length of the light-emitting section is 30 mm to 50 mm.

[0023] The beneficial effects of the device for locating body cavity tissue provided by the present invention are as follows: the distal end of the catheter assembly enters the human body through the body cavity or channel of the human body, and the fluid enters the balloon body through the lumen and the first through hole in turn, causing the balloon body to expand, pulling the catheter assembly and the balloon body to move as a whole, and the expanded balloon body is positioned and clamped in the body cavity or channel of the human body to achieve positioning in the surgical area, and the light output section is aligned with the surgical area. The light emitted by the controller is transmitted to the light output section through the input end of the optical fiber and emitted through the catheter assembly to mark the position of the body cavity or channel of the surgical area, solving the technical problem of difficulty in identifying the surgical area during existing surgery, thereby locating the surgical cutting boundary in real time and reducing the risk of miscutting due to complex anatomical structure during surgery. The controller is located outside the catheter assembly, and the optical fiber is used to transmit light without generating light. Its outer diameter is small and occupies little space, so that the cross-sectional area of ​​the catheter assembly is small, which is conducive to the smooth passage of the catheter assembly in the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the human prostate and urethra;

[0026] Figure 2 A schematic diagram of the structure of a device for locating body cavity tissue provided by an embodiment;

[0027] Figure 3 A schematic diagram of the structure of the device for locating body cavity tissue after removing the catheter assembly and part of the housing;

[0028] Figure 4 is a schematic diagram of the installation of an optical fiber in an embodiment;

[0029] Figure 5 for Figure 2 Sectional view along line AA;

[0030] Figure 6 A partial cross-sectional view of an optical fiber in a device for locating tissue in a body cavity;

[0031] Figure 7 A schematic diagram of a first installation method of a catheter assembly and an optical fiber;

[0032] Figure 8 Schematic diagram of the second installation method of the catheter assembly and optical fiber.

[0033] Among them, the reference numerals in the figures are:

[0034] 1. Bladder; 2. Prostate; 3. Urethra;

[0035] 100, catheter assembly; 110, lumen; 111, balloon channel; 112, optical channel; 113, drainage channel; 114, partition wall; 115, first light-transmitting tube; 116, second light-transmitting tube; 117, third light-transmitting tube; 118, liquid-guiding port; 119, liquid-guiding channel; 1110, drug delivery channel; 120, first through hole; 130, light-uniform surface;

[0036] 200, balloon body;

[0037] 300, light emitting component; 310, controller; 311, housing; 312, light source generator; 313, control board; 314, power adjustment element; 315, color adjustment element; 320, optical fiber; 322, light output section;

[0038] 410, metal sensing coil; 420, first connector; 430, second connector;

[0039] 500. Spectral measurement unit. DETAILED DESCRIPTION

[0040] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0041] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout this specification, not all references are to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0042] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0044] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] Combine Figures 2 to 4The device for locating tissue in a body cavity provided herein includes a catheter assembly 100, a balloon body 200, and a light-emitting assembly 300. The catheter assembly 100 has a lumen 110, and a first through-hole 120 is formed at the distal end of the catheter assembly 100. The first through-hole 120 communicates with the lumen 110. The balloon body 200 is disposed at the distal end of the catheter assembly 100 and communicates with the first through-hole 120.

[0046] The light-emitting component 300 includes a controller 310 and an optical fiber 320. The controller 310 is located outside the catheter component 100. The input end of the optical fiber 320 is connected to the controller 310. The output end of the optical fiber 320 is located on the side of the balloon body 200 far away from the catheter component 100 and is provided with a light-emitting section 322. The light-emitting section 322 extends along the length direction of the catheter component 100. The light emitted by the controller 310 is transmitted to the light-emitting section 322 through the input end of the optical fiber 320 and is emitted through the catheter component 100.

[0047] In this embodiment, the distal end of the catheter assembly 100 enters the human body through a body cavity or passage. The fluid enters the balloon body 200 through the lumen 110 and the first through hole 120 in sequence, causing the balloon body 200 to expand, pulling the catheter assembly 100 and the balloon body 200 to move as a whole. The expanded balloon body 200 is positioned and retained in the body cavity or passage of the human body, achieving positioning in the surgical area. The light emitting segment 322 is aligned with the surgical area. The light emitted by the controller 310 is transmitted to the light emitting segment 322 through the input end of the optical fiber 320 and emitted through the catheter assembly 100 to mark the location of the body cavity or passage of the surgical area. This solves the technical problem of difficulty in identifying the surgical area during existing surgeries, thereby locating the surgical cutting boundary in real time and reducing the risk of miscutting due to complex anatomical structures during surgery. In addition, the controller 310 is located outside the catheter assembly 100. The optical fiber 320 is used to transmit light and does not need to generate light. Its outer diameter is small and occupies little space, so that the cross-sectional area of ​​the catheter assembly 100 is small, which is conducive to the smooth passage of the catheter assembly 100 in the human body.

[0048] The body cavity or passageway may include the ureter, intestine, esophagus, lung passage, nasal cavity, blood vessels, oral cavity, etc. The surgical area may include the prostate, testicles, bladder, uterus, ovary, intestine, kidney, liver, pancreas, stomach, ear, nose, mouth, adipose tissue, muscle, brain, heart, lung, eye, skin, mucosal tissue, spinal cord, nerve tissue, cartilage, hard biological tissue, etc. The fluid used to expand the balloon body 200 may be gas or saline, etc., without limitation.

[0049] It should be noted that the proximal end and distal end in this application are defined relative to the operator. The end closer to the operator is the proximal end, and the end farther from the operator is the distal end.

[0050] In this embodiment, the optical fiber 320 is fixedly disposed within the lumen 110, which means that the optical fiber 320 is at least partially fixedly disposed within the lumen 110. The optical fiber 320 can be integrally formed with the catheter assembly 100 to achieve fixed placement of the optical fiber 320, or it can be manufactured separately from the catheter assembly 100 and then fixedly installed within the catheter assembly 100 by gluing, welding, clamping, interference fit, or the like.

[0051] In this embodiment, the balloon body 200 can be integrally formed with the catheter assembly 100, achieving a seamless connection between the catheter assembly 100 and the balloon body 200, eliminating interfacial stress concentration points, eliminating the need for assembly space and accommodating connection structures, and facilitating a small cross-sectional area design for the balloon body 200. It will be appreciated that in other embodiments, the balloon body 200 can be manufactured together with the catheter assembly 100 and then attached to the catheter assembly 100 by gluing, welding, snap-fitting, interference fitting, or the like.

[0052] In this embodiment, see Figures 6 to 8 The cross-sections of the catheter assembly 100 and the light-emitting section 322 can independently be circular, elliptical, polygonal, or irregular, without specific limitation herein. A cross-section refers to a cross-section perpendicular to its length. The outer diameter of the catheter assembly 100 is the diameter of the circumscribed circle of its cross-section. The outer diameter of the light-emitting section 322 is the diameter of the circumscribed circle of its cross-section.

[0053] In this embodiment, the optical fiber 320 includes a core and a cladding. The refractive index of the core is higher than that of the cladding, and light is transmitted in the core by total internal reflection. The light-emitting section 322 includes only the core, or the light-emitting section 322 includes the core and the cladding, and the thickness of the cladding is thinner than the thickness of the cladding at other locations. Alternatively, the cladding of the light-emitting section 322 has a partial gap, and light leaks from the core of the light-emitting section 322, allowing the light to scatter and achieve luminescence of the light-emitting section 322. The outer diameter of the light-emitting section 322 is small, without increasing the outer diameter and cross-sectional area of ​​the catheter assembly 100.

[0054] In some embodiments, combined Figure 3 and Figure 6 The outer diameter of the light-emitting section 322 gradually decreases as it moves away from the input end of the optical fiber 320. Due to light leakage in the light-emitting section 322, the luminous flux of the light-emitting section 322 gradually decreases, potentially leading to a gradual decrease in brightness. The gradually decreasing outer diameter of the light-emitting section 322 increases the contact surface between the light and the cladding / external medium, gradually increasing the proportion of leaked light in the light-emitting section 322. This dynamically compensates for brightness and achieves uniform brightness along the length of the light-emitting section 322, preventing misjudgment of the surgical area boundary during surgery.

[0055] Specifically, combined Figure 6The light-emitting section 322 is machined and engraved to achieve a gradually decreasing outer diameter. For example, the surface of the light-emitting section 322 is engraved in a tapered shape, resulting in a conical outer surface. The outer diameter of the light-emitting section 322 decreases gradually and smoothly toward the input end of the optical fiber 320. This results in a continuously and smoothly increasing proportion of light leakage from the light-emitting section 322. Combined with the continuous and gradual reduction in luminous flux, this achieves uniform brightness along the length of the light-emitting section 322.

[0056] In some embodiments, combined Figure 2 The periphery of the light emitting section 322 is provided with a uniform light surface 130 for uniformly dispersing the light, and / or the periphery of the catheter assembly 100 is provided with a uniform light surface 130 for uniformly dispersing the light, thereby achieving 360° circumferential uniform illumination, clearly locating the boundaries of the surgical area at various angles during the operation, improving the accuracy and safety of the operation, and reducing the risk of miscutting due to complex anatomical structures or insufficient light, without the need to rotate the optical fiber 320 to adjust the illumination angle.

[0057] Optionally, the light-homogenizing surface 130 is provided with 50-150 convex microstructures per millimeter.

[0058] Specifically, the light-homogenizing surface 130 is a frosted surface or a scattering particle coating to form more interfaces and have a better scattering effect on light.

[0059] Specifically, laser etching is used to form the light uniforming surface 130 on the periphery of the light emitting section 322 and / or the catheter assembly 100. For example, a micron-scale concave-convex array is engraved on the periphery of the light emitting section 322 to destroy the total reflection condition and induce multi-angle scattering.

[0060] Specifically, a coating of titanium dioxide nanoparticles doped with resin is applied to the periphery of light-emitting section 322 and / or catheter assembly 100. Titanium dioxide has a high refractive index and effectively scatters light. The surface of the titanium dioxide nanoparticles is highly reactive, interacting with molecules in the resin matrix to form strong chemical bonds, preventing the coating from falling off or peeling during use.

[0061] Specifically, the light emitting section 322 and / or the periphery of the catheter assembly 100 are coated with quantum dot materials (such as CdSe / ZnS) to convert ordinary red light into a wavelength of 610nm~630nm, thereby enhancing the tissue penetration depth.

[0062] In some embodiments, the length of the light-emitting segment 322 ranges from 30mm to 50mm, meeting the needs of different patients, including adults and children. For example, a 30mm-long light-emitting segment 322 for children achieves short-range, high-density scattering, suitable for narrow pediatric cavities. A 50mm-long light-emitting segment 322 for adults achieves long-range, low-density scattering, suitable for larger lesions, such as those with prostate hyperplasia (BPH) volumes greater than 80mL.

[0063] In some embodiments, combined Figure 4 、 Figure 7 and Figure 8 Lumen 110 includes a balloon channel 111, an optical channel 112, and a drainage channel 113, all of which are independent of each other. The distal end of balloon channel 111 communicates with first through-hole 120, and optical fiber 320 is disposed within optical channel 112. Drainage channel 113 allows fluid to flow from the distal end of catheter assembly 100 to the proximal end, and is used solely for draining fluids from the human body. For example, during prostate surgery, drainage channel 113 is used to drain urine from the bladder.

[0064] By physically isolating the drainage channel 113 (liquid discharge), the balloon channel 111 (balloon body 200 control) and the optical path channel 112 (optical fiber 320 transmission), functional decoupling and collaborative optimization are achieved. On the one hand, the expansion and contraction of the balloon body 200 can be independently and accurately controlled, and the balloon channel 111 with a suitable inner diameter is selected to improve the expansion efficiency of the balloon body 200. On the other hand, the optical path channel 112 with a smaller inner diameter than the balloon channel 111 is selected to stabilize the position of the light output section 322 of the optical fiber 320 and reduce light intensity fluctuations.

[0065] In one embodiment, the combination Figure 4 In the cross-section of the catheter assembly 100, the light path 112 is annular and arranged around the circumference of the lumen 110, and the light output section 322 is spirally wound within the light path 112. Based on this, the spiral ring-shaped light output section 322 can firstly improve the circumferential uniformity of the light output and reduce the standard deviation of the circumferential light intensity distribution. Secondly, it increases the illumination coverage area, reduces dark spots or bright spots, and increases the effective light output length by 3-5 times compared to a linear design. It also approaches the outer circumference of the catheter assembly 100, shortening the optical path and further improving the brightness. Finally, it improves the compressive strength of the catheter assembly 100 and the light output section 322, preventing optical path deviation caused by instrument friction during laparoscopic surgery.

[0066] In one embodiment, the combination Figure 7 In the cross-section of the catheter assembly 100, the optical path 112 is located in the middle of the lumen 110, and the light-emitting segment 322 is linear, extending along the length of the optical path 112. With the light-emitting segment 322 located in the middle of the catheter assembly 100, light radiates from the center of the catheter assembly 100 to all sides, eliminating the "one-sided overexposure" problem caused by an off-center light field. Furthermore, the linear light-emitting segment 322 has a small outer diameter, facilitating a smaller design for the catheter assembly 100.

[0067] In this embodiment, the distal end of the optical channel 112 is closed to isolate the micro-vibrations caused by the liquid flow.

[0068] Specifically, combined Figure 8 A partition wall 114 is integrally formed within lumen 110 to separate the interior of lumen 110 into a balloon channel 111, an optical channel 112, and a drainage channel 113. This integrally formed partition wall 114 provides seamless connections, eliminates interfacial stress concentration points, and eliminates the need for assembly space or accommodating connection structures, facilitating the ultra-thin design of catheter assembly 100. Furthermore, the shapes and positions of balloon channel 111, optical channel 112, and drainage channel 113 are fixed, eliminating the risk of leakage.

[0069] In one embodiment, the combination Figure 7 Catheter assembly 100 includes a first light-transmitting tube 115, a third light-transmitting tube 117, and a second light-transmitting tube 116 nested in sequence from the outside in. A balloon channel 111 is formed between the first and third light-transmitting tubes 115, 117. A drainage channel 113 is formed between the third and second light-transmitting tubes 117, 116. The interior of second light-transmitting tube 116 forms an optical path 112. Therefore, optical path 112 is centrally located and compact, facilitating the central placement of optical fiber 320 and facilitating uniform circumferential light output, ensuring undistorted optical signals. Balloon channel 111 and drainage channel 113 are annular channels with large areas, promoting uniform and rapid fluid flow.

[0070] Optionally, the first light-transmitting tube 115, the third light-transmitting tube 117, and the second light-transmitting tube 116 can be transparent silicone tubes. Silicone tubes have a visible light transmittance of 85%-99%, good biocompatibility, and a bending lifespan of up to 100,000 cycles, making them easy to pass through blood vessels or the urethra.

[0071] Optionally, at least one of the first light-transmitting tube 115 , the third light-transmitting tube 117 and the second light-transmitting tube 116 is provided with a light-uniform surface 130 in the form of a frosted structure corresponding to the light-emitting section 322 to improve light evenness.

[0072] Optionally, combined Figure 5 The side of the first light-transmitting tube 115 includes a liquid guide port 118, and the lumen 110 further includes a liquid guide channel 119 that seals and connects the liquid guide port 118 to the drainage channel 113. Liquid guide channel 119 forms a low-resistance liquid passage, facilitating rapid drainage of bodily fluids. Furthermore, the location of the liquid guide port 118 at the distal side of the first light-transmitting tube 115, rather than at the end, maintains good rigidity at the end of the catheter assembly 100, improving the passage of the catheter assembly 100 through blood vessels or the urethra.

[0073] In some embodiments, combined Figure 8 The lumen 110 also includes a drug administration channel 1110, which prevents the drug from being contaminated by physically isolating the drug administration channel 1110, the drainage channel 113 (liquid discharge), the balloon channel 111 (controlled by the balloon body 200) and the optical path channel 112 (transmission by the optical fiber 320).

[0074] In some embodiments, the catheter assembly 100 is integrally injection molded with the optical fiber 320, eliminating the need for a connecting structure. This helps reduce the outer diameter of the catheter assembly 100, eliminates the problem of thermal expansion coefficient differences in traditional glue bonding, reduces the temperature drift rate, and ensures that the optical fiber 320 is firmly and accurately positioned within the catheter assembly 100.

[0075] In some embodiments, combined Figure 2 and 3 The input end of the optical fiber 320 extends out of the catheter assembly 100 and is provided with a first connector 420. The controller 310 is provided with a second connector 430 that is detachably connected to the first connector 420. Based on this, the optical fiber 320 and the controller 310 are easily assembled and disassembled, and different models of controllers 310 and optical fibers 320 can be assembled and used, which has good versatility.

[0076] In some embodiments, the controller 310 controls the light emitting section 322 to emit laser light, which is conducive to accurately controlling the thickness of surgical resection and avoiding damage to normal tissue. For example, due to changes in the internal structure of prostate hyperplasia tissue, such as different sizes of alveoli, glandular epithelium stacked in a stratified epithelial-like pattern, obvious proliferation of interstitial cells and irregular arrangement, etc. The cell proliferation and disordered arrangement in prostate hyperplasia tissue cause the light to be partially absorbed or attenuated when passing through, resulting in slight changes in the optical path difference. The laser has high coherence. After passing through prostate hyperplasia tissue, the brightness is low due to refraction and attenuation. After the prostate hyperplasia tissue is removed, the laser light passes through the normal prostate tissue and the brightness is brighter, which can accurately indicate that the surgical resection is complete and avoid urethral damage caused by continued resection.

[0077] In some embodiments, combined Figure 2 and Figure 3 Controller 310 includes a housing 311, a light source generator 312, and a control board 313. Housing 311 is located outside first light-transmitting tube 115, while control board 313 and light source generator 312 are mounted inside housing 311. Light source generator 312 is connected to optical fiber 320, and control board 313 is used to control light source generator 312 to generate light. Therefore, controller 310, including large components such as light source generator 312, is placed outside catheter assembly 100. This significantly reduces the outer diameter of catheter assembly 100, facilitates replacement and operation of components such as the light source, and prevents thermal damage to human tissue caused by light source generator 312 being located inside catheter assembly 100.

[0078] In one embodiment, the combination Figure 2 and Figure 3The controller 310 also includes a power adjustment component 314, which is electrically connected to the control board 313. The power adjustment component 314 is used to adjust the light power of the light source generator 312, and then adjust the brightness of the light generated by the light source generator 312. It can flexibly adjust the brightness of the light output section 322 according to different body shapes and different tissue thicknesses to accurately mark the surgical area.

[0079] In one embodiment, the combination Figure 2 and Figure 3 The light source generator 312 includes multiple colored lamps, and the controller 310 also includes a color adjustment component 315. This component is electrically connected to the control board 313 and is used to switch the multiple lamps on and off, allowing the light source generator 312 to produce light of different colors. Different colors of light have different penetrating powers, and the wavelength is automatically switched based on the tissue type (e.g., blood vessel / tumor) and tissue thickness during surgery to optimize the marking brightness. For example, in vascular development, the color adjustment component 315 is used to control the light source generator 312 to produce green light, and in marking deep tissue, the color adjustment component 315 is used to control the light source generator 312 to produce red light; for children with thinner tissue, the color adjustment component 315 is used to control the light source generator 312 to produce blue-green light in the band of 450nm-550nm, with a penetration depth of 1mm-2mm to avoid damaging deep sensitive tissues; for adults with thicker tissue, the color adjustment component 315 is used to control the light source generator 312 to produce infrared light in the band of 800nm-1500nm, with a penetration depth of 5mm-10mm to enhance the development of deep lesions.

[0080] Specifically, the light source generator 312 integrates a six-color high-density LED / laser chip array, supports a spectral range of 470 nm -1550 nm, and achieves millisecond-level light color switching through the color adjustment component 315.

[0081] In some embodiments, in combination Figure 3 and Figure 4 The device for locating the tissue in the body cavity also includes a metal sensor, which includes a metal sensing coil 410 and a signal converter. The signal converter is integrated into the controller 310. The metal sensing coil 410 is located on the side of the light-emitting section 322 away from the balloon body 200. The metal sensing coil 410 is electrically connected to the signal converter via a wire. Based on this, on the one hand, the outer diameter of the metal sensing coil 410 is small, which is conducive to the miniaturization design of the catheter assembly 100, while the larger signal converter is integrated into the controller 310. On the other hand, the metal sensing coil 410 can timely sense the distance of the metal surgical tool, which is conducive to accurately controlling the surgical resection thickness and avoiding damage to normal tissue.

[0082] Optionally, the metal sensing coil 410 has a diameter of 1.5 mm and an adjustable frequency of 1-10 MHz, capable of detecting iron, nickel, and cobalt alloys within a 5 mm range (sensitivity 0.1 mm³). The signal converter, integrated into the controller 310 and with a response time of <0.1 ms, converts electromagnetic signals into digital positioning coordinates (accuracy ±50 μm). The conductors, made of ultrafine silver nanowires (20 μm diameter, impedance <0.1 Ω), are stretch-resistant and resistant to electromagnetic interference, ensuring signal stability during surgery.

[0083] In one embodiment, the combination Figure 2 and Figure 3 The device for locating tissue in a lumen also includes a spectral measurement unit 500. Light emitted by the optical fiber 322 reflects off obstructions, forming a light echo. This light echo is received by the optical fiber 322 and transmitted to the spectral measurement unit 500, which analyzes the phase delay and intensity attenuation of the light echo. By leveraging the optical fiber 320's ability to transmit light, the light can be recovered and analyzed to determine whether it has passed through diseased tissue, facilitating precise control of surgical resection thickness and avoiding damage to normal tissue.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for locating tissue in a body cavity, characterized in that: include: A catheter assembly, wherein the catheter assembly has a lumen, and a distal end of the catheter assembly has a first through hole, wherein the first through hole is in communication with the lumen; a balloon body, the balloon body being disposed at the distal end of the catheter assembly and communicating with the first through hole; A light-emitting assembly, comprising a controller and an optical fiber, wherein an input end of the optical fiber is connected to the controller, an output end of the optical fiber is disposed within the lumen, and a light-emitting section is provided at the output end of the optical fiber on a side of the balloon body distal to the distal end of the catheter assembly, the light-emitting section extending along the length of the catheter assembly; light emitted by the controller is transmitted through the input end of the optical fiber to the light-emitting section and is emitted through the catheter assembly; A coating of titanium dioxide nanoparticles doped with resin is provided on the periphery of the light-emitting section and / or the conduit assembly; The lumen includes a balloon channel, an optical path channel, and a drainage channel that are independent of each other. The distal end of the balloon channel is communicated with the first through hole. The optical fiber is disposed in the optical path channel. The drainage channel is used to allow liquid to flow from the distal end of the catheter assembly to the proximal end of the catheter assembly. In a cross section of the catheter assembly, the optical path channel is annular and arranged around the circumference of the lumen. The light emitting section is spirally wound in the optical path channel. The device for locating in-vivo lumen tissue further comprises a metal sensor, which comprises a metal sensing coil and a signal converter. The signal converter is integrated into the controller. The metal sensing coil is located on a side of the light-emitting section away from the balloon body. The metal sensing coil is electrically connected to the signal converter via a wire. The device for locating in vivo cavity tissue also includes a spectral measurement unit. The light emitted by the light-emitting segment is reflected by an obstruction to form a return light. The light-emitting segment receives the return light and transmits the return light to the spectral measurement unit. The spectral measurement unit is used to analyze the phase delay and intensity attenuation of the return light.

2. The device for locating body cavity tissue according to claim 1, characterized in that: The length of the light-emitting section is 30 mm to 50 mm.

3. The device for locating body cavity tissue according to claim 1, characterized in that: The catheter assembly is integrally injection-molded with the optical fiber, and / or the input end of the optical fiber extends out of the catheter assembly and is provided with a first connector, and the controller is provided with a second connector detachably connected to the first connector.

4. The device for locating body cavity tissue according to claim 1, characterized in that: The controller includes a housing, a light source generator and a control board. The control board and the light source generator are installed inside the housing. The light source generator is connected to the input end of the optical fiber. The control board is used to control the light source generator to generate light.

5. The device for locating body cavity tissue according to claim 4, characterized in that: The controller further includes a power adjustment component, the power adjustment component is electrically connected to the control board, and the power adjustment component is used to adjust the optical power of the light source generator; And / or, the light source generator includes lamp beads of multiple colors, and the controller also includes a color adjustment component, which is electrically connected to the control board, and the color adjustment component is used to switch the multiple lamp beads so that the light source generator produces light of different colors.

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