Body fluid collection device

Abstract

The present invention proposes a body fluid collection device that improves the success rate of laser fluid collection, including a light guide tube that is a double-sided open cylinder, a laser resonant cavity and a beam-shaping mirror. The laser emitted from the laser resonant cavity is focused by the beam-shaping mirror and irradiated onto the irradiated object along the light path in the light guide tube. The device is characterized in that the light guide tube has a contact surface structure at one end away from the beam-shaping mirror, and the diameter of the light guide hole on the contact surface structure is less than 1 cm. We impose such a technical solution at the contact point on the body surface to constrain it. The mass of the axial high-density jet ejected after ablation is reduced, thereby reducing the amount of contamination on the surface of the optical lens group, so that the light output power stability and reliability of the body fluid collection device are improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a body fluid collection device. Background Art

[0002] Body fluids generally refer to the liquid substances in the body. Body fluids include intracellular fluid and extracellular fluid. Intracellular fluid accounts for 2 / 3 of all body fluids, and extracellular fluid accounts for 1 / 3 of all body fluids. Common body fluids include human plasma, blood, tissue fluid, pleural fluid, peritoneal fluid, cerebrospinal fluid, semen, and vaginal fluid. In addition, perilymph also belongs to body fluids, so body fluids are a very large range.

[0003] Existing laser body fluid collection devices will produce three phenomena when the laser beam hits the skin surface, namely reflection (Refliction), absorption (Absorption) and penetration (Transmission). The heat energy carried by the infrared light is absorbed by the skin and decomposition products such as melting, vaporization and plasma appear. By removing these decomposition products, ablation holes can be formed on the skin surface, so that body fluids can be collected in the ablation holes.

[0004] This type of equipment that uses lasers to ablate the surface of biological bodies often has a smaller laser hole and a larger barrel diameter. For example, when collecting body fluids on the surface of the human body, the human skin will have a certain curvature, resulting in inaccurate focusing of the optical path, poor light energy focusing performance, and failure to complete the required ablation function; or the ablation area is too large, and too much ablation material is too much, which leads to excessive mass of the axial high-density jet ejected after ablation, which will also affect the increase in contamination on the surface of the optical lens group, thereby interfering with the subsequent laser ablation process, and ultimately resulting in unstable light output power and reduced reliability of the body fluid collection equipment. Summary of the invention

[0005] In order to solve at least one of the above technical problems, an object of an embodiment of the present invention is to provide a body fluid collection device.

[0006] In order to achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0007] A body fluid collection device for improving the success rate of laser fluid collection includes a light guide tube with double-sided openings, a laser resonant cavity and a beam-shaping mirror. The laser emitted from the laser resonant cavity is focused by the beam-shaping mirror and irradiated onto the irradiated object along the light path in the light guide tube.

[0008] It is characterized in that

[0009] The light guide tube has a contact surface structure at one end away from the beam-shaping mirror, and the diameter of the light guide hole on the contact surface structure is less than 1 cm.

[0010] We use such a technical solution to constrain the contact point with the body surface, thereby reducing the mass of the axial high-density jet ejected after ablation, thereby reducing the amount of contamination on the surface of the optical lens group, and improving the stability of the light output power and reliability of the body fluid collection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the main structure of a body fluid collection device provided by an embodiment of the present invention, which includes 1 a light guide cylinder, 2 a laser resonant cavity, 3 a beam-shaping mirror, 4 a contact surface structure, and 5 a contact surface structure light guide hole;

[0012] Figure 2 An axonometric diagram of a light guide tube pollution interception structure of a body fluid collection device provided in an embodiment of the present invention, which includes 6 pollution interception structures, 7 light guide holes, and 8 pollution guide holes;

[0013] Figure 3 A full cross-sectional view of the pollution interception structure of the light guide tube of the body fluid collection device provided in an embodiment of the present invention, which includes 6 pollution interception structures, 7 light guide holes, and 8 pollution guide holes;

[0014] Figure 4 An axial cross-sectional view of the light guide holes of the body fluid collection device provided by an embodiment of the present invention, including 7 light guide holes;

[0015] Figure 5 An axial cross-sectional view of the sewage guide hole of the body fluid collection device provided by an embodiment of the present invention, which includes 8 sewage guide holes;

[0016] Figure 6 An axial cross-sectional view of the light path and the pollution guide hole of the light guide tube of the body fluid collection device provided by the embodiment of the present invention, which includes 1 light guide tube, 3 beam-shaping mirrors, 7 light guide holes, and 8 pollution guide holes;

[0017] Figure 7 A schematic diagram of the optical path axis of the light guide tube and the central axis of the pollution guide hole of the body fluid collection device provided in an embodiment of the present invention, which includes 1 light guide tube, 3 beam-shaping mirrors, 7 light guide holes, and 8 pollution guide holes;

[0018] Figure 8 A partial cross-sectional schematic diagram of a light guide tube partition of a body fluid collection device provided in an embodiment of the present invention, which includes 6 pollution interception structures and 9 partitions;

[0019] Fig. 9 A schematic diagram of an air pressure difference device of a body fluid collection device provided in an embodiment of the present invention, comprising 7 light guide holes and 10 air pressure difference devices.

[0020] Fig.10 A schematic diagram of a shutter partition device of a body fluid collection device provided in an embodiment of the present invention, comprising 1 light guide tube, 3 beam-forming mirrors, and 11 shutter partition devices.

[0021] The realization of the purpose, functional characteristics and excellent effects of the present invention will be further described below in conjunction with specific embodiments and drawings. DETAILED DESCRIPTION

[0022] Body fluids generally refer to the liquid substances in the body. Body fluids include intracellular fluid and extracellular fluid. Intracellular fluid accounts for 2 / 3 of all body fluids, and extracellular fluid accounts for 1 / 3 of all body fluids. Common body fluids include human plasma, blood, tissue fluid, pleural fluid, peritoneal fluid, cerebrospinal fluid, semen, and vaginal fluid. In addition, perilymph also belongs to body fluids, so body fluids are a very large range.

[0023] Existing laser body fluid collection devices will produce three phenomena when the laser beam hits the skin surface, namely reflection (Refliction), absorption (Absorption) and penetration (Transmission). The heat energy carried by the infrared light is absorbed by the skin and decomposition products such as melting, vaporization and plasma appear. By removing these decomposition products, ablation holes can be formed on the skin surface, so that body fluids can be collected in the ablation holes.

[0024] This type of equipment that uses lasers to ablate the surface of biological bodies often has a smaller laser hole and a larger barrel diameter. For example, when collecting body fluids on the surface of the human body, the human skin will have a certain curvature, resulting in inaccurate focusing of the optical path, poor light energy focusing performance, and failure to complete the required ablation function; or the ablation area is too large, and too much ablation material is too much, which leads to excessive mass of the axial high-density jet ejected after ablation, which will also affect the increase in contamination on the surface of the optical lens group, thereby interfering with the subsequent laser ablation process, and ultimately resulting in unstable light output power and reduced reliability of the body fluid collection equipment.

[0025] In order to solve the above problems, we propose a body fluid collection device.

[0026] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0027] like Figure 1 As shown, a body fluid collection device for improving the success rate of laser fluid collection includes a light guide tube with double-sided openings, a laser resonant cavity and a beam-shaping mirror. The laser emitted from the laser resonant cavity is focused by the beam-shaping mirror and irradiated onto the irradiated object along the light path in the light guide tube.

[0028] It is characterized in that

[0029] The light guide tube has a contact surface structure at one end away from the beam-shaping mirror, and the diameter of the light guide hole on the contact surface structure is less than 1 cm.

[0030] Here, the beam mirror is a kind of optical lens, and the ablated tissue residues ejected out are easily adsorbed on the surface of the beam mirror, causing contamination.

[0031] Such a technical solution is applied to the contact point with the body surface to constrain the mass of the axial high-density jet ejected after ablation, thereby reducing the amount of contamination on the surface of the optical lens group, thereby improving the light output power stability and reliability of the body fluid collection device.

[0032] Furthermore, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0033] It is characterized in that

[0034] The beam shaping mirror is a diffractive optical element with a long focal depth.

[0035] Although the body surface contact structure reduces the curvature of the body surface, the body surface is still not completely straight in many scenarios. When the ablation device is working, it is necessary to ablate biological tissue at a certain depth. At this time, the optical system often cannot directly move the focus of its light path, which affects its ablation effect.

[0036] Long focal depth diffractive optical elements are a new solution, called Beam Focus ElongatedFocus in English, which can achieve longer focal depth and higher lateral resolution (smaller spot size). Long focal depth requires small numerical aperture, and small spot size requires large numerical aperture. These two are originally conflicting, but long focal depth diffractive optical elements can make lasers have these two characteristics at the same time, so they are very suitable for some industrial applications. For example, laser drilling, cutting of transparent materials (glass, sapphire, etc.), thick steel plate laser cutting, etc.

[0037] Conventional optical elements (such as spherical lenses, mirrors, etc.) cannot meet these two characteristics at the same time. However, long focal depth diffractive optical elements can produce a long focal depth focus similar to a "long cylinder", with sharp edges and longer focal depth, while keeping the laser spot size very small.

[0038] The function of the long focal depth diffractive optical element is to make the incident laser produce a focus with nearly uniform energy distribution and focal depth of tens of microns to several millimeters near the focal length. Compared with the ordinary laser focus (the energy is very concentrated, the length and width are limited), the long focal depth diffractive optical element can stretch the laser focus to dozens to hundreds of times the original, while the width remains basically unchanged. The long focal depth spot with uniform energy is particularly suitable for deep cutting of materials.

[0039] Furthermore, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0040] It is characterized in that

[0041] The beam shaping mirror ensures that the focal depth range of the optical path of the device is greater than 3 mm, and the cross-sectional shape of the light guide hole on the contact surface structure matches the shape of the light waist.

[0042] The beam-shaping mirror is a diffractive optical element with a long focal depth. In the scenario of this type of medical device, it is necessary to ensure that the focal depth range of the optical path of the body fluid collection device is greater than 3mm.

[0043] Furthermore, the cross-sectional shape of the holes on the body surface contact structure matches the shape of the light waist, which will not affect the incidence of the laser beam and avoid laser energy loss.

[0044] Furthermore, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0045] It is characterized in that

[0046] The beam-shaping mirror has a positive optical focal length and a light aperture smaller than 10 mm, so that the spot radius at the light waist of the body fluid collection device is smaller than 0.7 mm.

[0047] The above optical parameters are more suitable for scenarios of medical devices such as body fluid collection equipment, with better ablation effects and less skin decomposition products.

[0048] like Figure 2 , Figure 3 As shown, further, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0049] It is characterized in that

[0050] The light guide tube has one or more pollution intercepting structures in the middle part, and each pollution intercepting structure has one or more pollution guiding holes in addition to one light guiding hole.

[0051] After the turbulent interference, the axial high-density jet of the tissue residue deviates from the light path, and most of it is blocked by the pollution interception structure and adsorbed on the polymer material of the pollution interception structure. Only a small part of the residue passes through the light guide hole into the inner cavity of the tube between the beam-shaping mirror and the pollution interception structure, reducing the contamination of the beam-shaping mirror by the tissue residue.

[0052] By designing a turbulent flow space in the light-shielding tube for the ejected residue, the skin residue ejected in the reverse direction enters the turbulent flow space through the dirt leakage hole in the form of one or more stain jets, interfering with the static gas in the cavity, causing the axial jet sprayed toward the optical lens to turn and deviate from the axial center position of the optical lens, thereby achieving the purpose of preventing pollution of the light path.

[0053] Due to the focusing of the laser, the size of the light guide hole matches the optical path, reducing the loss of laser energy. Therefore, the cross-sectional area of ​​the light leakage hole is small, and the cross-sectional area of ​​the pollution leakage hole can be designed to be relatively large. For example, the cross-sectional diameter of the pollution leakage hole is more than 1.5 times that of the light leakage hole, which can better play the purpose of disturbing the flow and preventing pollution of the optical path.

[0054] like Figure 4 As shown, further, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0055] It is characterized in that

[0056] The axial section of the light guide hole is trapezoidal.

[0057] This means that the diameter of the light guide hole on the side facing the laser input is different from the diameter of the light guide hole on the side facing the laser output.

[0058] When the axial section of the light guide hole is a trapezoid, and the ratio of the hole diameter on the side facing the laser incident to the hole diameter on the side facing the laser emission is greater than or equal to (L1+H) / L1, the cross-sectional area of ​​the light guide hole matches the theoretical cross-sectional area of ​​the focusing light path, which not only ensures the avoidance of laser energy loss, but also reduces the possibility of stains leaking from the light guide hole to the beam-shaping mirror due to the small aperture. Here, L1 is the distance from the plane of the hole on the side facing the laser emission to the focal plane of the light path, and H is the thickness of the light guide hole of the pollution-isolating structure.

[0059] When the axial section of the light guide hole is trapezoidal, and the hole diameter on the laser incident side is smaller than the hole diameter on the laser emission side, and the cross-sectional area of ​​the light guide hole matches the theoretical cross-sectional area of ​​the focusing light path, and the angle between the central axis of the light guide hole and the straight line formed by the center of the beam-shaping mirror and the focal point is greater than 30 degrees, it not only ensures the unobstructed passage of the laser and avoids the loss of laser energy, but also because the space formed by the light guide hole causes the stains passing through the light guide hole to be forced to deflect in direction, it can better achieve the purpose of disturbing the flow and preventing pollution of the light path.

[0060] like Figure 5 As shown, further, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0061] It is characterized in that

[0062] The axial section of the sewage guide hole is trapezoidal.

[0063] Similar to the principle of the light guide hole, when the diameter of the hole facing the laser incident side of the pollution guide hole is smaller than the diameter of the hole facing the laser emission side, the space formed by the pollution guide hole is more convenient for the ejected stains to pass through, thereby better achieving the purpose of disturbing the flow and preventing pollution of the light path.

[0064] like Figure 6 As shown, further, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0065] It is characterized in that

[0066] The straight line formed by the center of the beam-shaping mirror and the focal point is on the same plane as the central axis of the light-guiding cylinder, the center of the other pollution-guiding hole is also on the plane, and the ray from the focal point to the center of the pollution-guiding hole and the ray from the focal point to the center of the light-guiding hole are respectively located on both sides of the parallel line of the central axis of the light-guiding cylinder passing through the focal point.

[0067] Such a technical solution can make the distribution of the light guide holes and the pollution guide holes on the pollution interception structure more uniform, thereby making the processing more convenient.

[0068] like Figure 7 As shown, further, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0069] It is characterized in that

[0070] The angle between the straight line formed by the center and the focal point of the beam-shaping mirror and the central axis of the pollution-guiding hole is greater than or equal to 0 degrees and less than 90 degrees.

[0071] Similar to the principle of the light guide hole, the above solution, i.e. the central axis of the pollution guide hole, may not pass through the focus. The space formed by the pollution guide hole causes the stains passing through the pollution guide hole to be forced to deflect in a certain direction, which can better achieve the purpose of disturbing the flow and preventing pollution of the light path.

[0072] like Figure 8 As shown, further, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0073] It is characterized in that

[0074] A partition is provided in the cavity between the laser incident end of the cylinder and the pollution interception structure.

[0075] The partition isolates the air flow between the light guide hole and the dirt guide hole, so that the stains passing through the dirt guide hole can no longer be deposited on the surface of the beam shaping mirror.

[0076] Furthermore, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0077] It is characterized in that

[0078] A dust collecting device is arranged on the partition plate.

[0079] The dust collecting device on the partition can collect the dirt and dust floating in the air, so that the dirt can no longer be deposited on the surface of the beam mirror.

[0080] The dust collecting device here can be an electrostatic dust removal device, which has good dust removal effect and low cost.

[0081] like Fig. 9 As shown, further, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0082] It is characterized in that

[0083] An air pressure difference controller is arranged at the incident end of the light guide hole.

[0084] Here, the air pressure difference controller can control the air pressure difference in the air, thereby guiding the airflow and preventing stains in the airflow from being deposited on the surface of the beam shaping mirror.

[0085] The air pressure difference controller here includes a radial air pressure difference controller and an axial air pressure difference controller.

[0086] like Fig.10 As shown, further, as a specific embodiment of a body fluid collection device provided by the present invention, the body fluid collection device,

[0087] It is characterized in that

[0088] A light blocking device is arranged between the light guide tube and the beam-shaping mirror.

[0089] The light blocking device here may be a shutter blocking device, and the shutter model here may be: J242 brand YYZD, exposure time 1 / 8000s.

[0090] Here, the shutter isolation device can control the shutter exposure time, open before the laser is emitted, and close within 1 / 8000s after the laser is emitted, thereby isolating the airflow and preventing stains in the airflow from splashing onto the surface of the beam-shaping mirror.

[0091] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A body fluid collection device for improving the success rate of laser fluid collection, comprising a light guide tube with double-sided openings, a laser resonant cavity and a beam-shaping mirror, wherein the laser emitted from the laser resonant cavity is focused by the beam-shaping mirror and irradiated onto the irradiated object along the light path in the light guide tube, characterized in that: The light guide tube has a contact surface structure at one end away from the beam-shaping mirror, and the diameter of the light guide hole on the contact surface structure is less than 1 cm; The light guide tube has one or more pollution intercepting structures in the middle, and each pollution intercepting structure has one or more pollution guiding holes in addition to a light guiding hole; The straight line formed by the center of the beam-shaping mirror and the focal point is on the same plane as the central axis of the light-guiding cylinder, the center of the other pollution-guiding hole is also on the plane, and the ray from the focal point to the center of the pollution-guiding hole and the ray from the focal point to the center of the light-guiding hole are respectively located on both sides of the parallel line of the central axis of the light-guiding cylinder passing through the focal point.

2. A body fluid collection device as claimed in claim 1, characterized in that: The beam shaping mirror is a diffractive optical element with a long focal depth.

3. A body fluid collection device as claimed in claim 1, characterized in that: The axial section of the light guide hole is trapezoidal.

4. A body fluid collection device as claimed in claim 1, characterized in that: The axial section of the sewage guide hole is trapezoidal.

5. A body fluid collection device as claimed in claim 1, characterized in that: The angle between the straight line formed by the center and the focal point of the beam-shaping mirror and the central axis of the pollution-guiding hole is greater than or equal to 0 degrees and less than 90 degrees.

6. A body fluid collection device as claimed in claim 1, characterized in that: A partition is provided in the cavity between the laser incident end of the cylinder and the pollution interception structure.

7. A body fluid collection device as claimed in claim 1, characterized in that: An air pressure difference controller is arranged at the incident end of the light guide hole.

8. A body fluid collection device as claimed in claim 1, characterized in that: A light blocking device is arranged between the light guide tube and the beam-shaping mirror.

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