In vivo indicating optical fiber and preparation method thereof

Abstract

The present invention provides an in vivo indication optical fiber and a preparation method thereof, wherein a light-transmitting window section is provided on the side wall of the optical fiber, a reflective end for reflecting light is provided at one end of the optical fiber, and the other end of the optical fiber is used to connect an indication light source. The preparation method comprises the following steps: generating a light-transmitting window section on the outer wall of the optical fiber; making a reflective end at the end of the optical fiber; and obtaining an in vivo indication optical fiber with light leakage on the side wall through the above steps. The present invention can form a strip light source that emits light uniformly along the outer wall of the optical fiber axis, and the provided reflective end can further enhance the effect of the side wall light emission, without the risk of damaging body tissues while ensuring sufficient light intensity. The preparation method of the present invention is improved on the basis of the medical optical fiber in the prior art, forming a window section, reducing the reflectivity of the outer cladding of the optical fiber, and increasing the scattering rate, thereby achieving uniform light emission, indicating the position of the pipeline in the human body, and avoiding medical accidents.

Description

Technical Field

[0001] The invention relates to the field of auxiliary medical equipment, in particular to an in vivo indicating optical fiber and a preparation method thereof. Background Art

[0002] During minimally invasive surgeries in obstetrics and gynecology, anorectal surgery, and urology, there have been medical accidents where the ureters or other human tubes were accidentally injured due to failure to accurately locate the position of the ureters or other human tubes.

[0003] The prior art discloses a type of luminous light guide tube, which is inserted into the patient's ureter or other ducts during surgery, and the light emitted by the light guide tube is used to indicate the ureter or other ducts. However, in minimally invasive surgery, the light intensity of this type of luminous light guide tube is weak and the indication effect is poor.

[0004] Chinese patent document CN206151422U describes a system for detecting and displaying the ureter during abdominal surgery, and provides an endoscopic image that uses a light guide tube that flashes alternately between light and dark to generate an alternating light and dark image, thereby accurately displaying the position of the ureter. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an in vivo indicating optical fiber and a preparation method thereof, which can generate a higher luminous intensity and reliably indicate the position of the ureter.

[0006] Another technical problem to be solved by the present invention is to provide a method for preparing the above-mentioned in vivo indicator optical fiber, which can increase the brightness of the light guide tube, reduce the difficulty of the production process, and reduce the production cost.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: an in-vivo indicator optical fiber, a light-transmitting window section is provided on the side wall of the optical fiber, a reflective end for reflecting light is provided at one end of the optical fiber, and the other end of the optical fiber is used to connect to an indicator light source.

[0008] In a preferred embodiment, the optical fiber comprises a core, a transparent outer cladding is provided outside the core, and the window section is located in the outer cladding;

[0009] The window section is concavely located in the outer cladding;

[0010] The wire core is made of PMMA, PS or PC.

[0011] The outer layer is made of PTFE, PVC or PU.

[0012] In a preferred embodiment, the window section has a frosted outer surface;

[0013] Or the window section is a chemically corroded outer surface;

[0014] Or the window section is a combination of multiple bubbles located on or near the surface by laser ablation;

[0015] Alternatively, the window section is one or more annular notches.

[0016] In a preferred embodiment, the diameter of the wire core is 0.2-2.5 mm, and the thickness of the outer covering is 0.1-1.225 mm.

[0017] In a preferred embodiment, the reflective end is semicircular;

[0018] The reflective end has an enlarged structure;

[0019] The reflective end is made of PTFE, PVC or PU.

[0020] In a preferred solution, a reflective layer is provided inside the reflective end.

[0021] The optical fiber is sleeved in a transparent urinary catheter.

[0022] In a preferred solution, a plurality of scales are provided on the outer wall of the optical fiber;

[0023] A seat body for connecting an indicating light source is arranged at the other end of the optical fiber.

[0024] A method for preparing the above-mentioned in vivo indicating optical fiber comprises the following steps:

[0025] s1. Generate a light-transmitting window section on the outer wall of the optical fiber;

[0026] s2. Make a reflective end at the end of the optical fiber;

[0027] Through the above steps, an in vivo indicator optical fiber with side wall light leakage is obtained.

[0028] In a preferred solution, during the pulling of the optical fiber, the outer wall of the optical fiber is intermittently clamped with a diamond chuck, and the outer wall of the optical fiber is ground by the diamond chuck to form a window section;

[0029] Alternatively, the outer wall of the optical fiber is intermittently ground with a diamond grinding wheel to form a window section;

[0030] Alternatively, the outer wall of the optical fiber is cut in an annular shape with a disk-shaped blade to form a window section;

[0031] Alternatively, the outer wall of the optical fiber is annularly ablated by a laser head to form a window section.

[0032] In a preferred solution, the end of the optical fiber is cast with polytetrafluoroethylene powder, the polytetrafluoroethylene composite powder is placed in an end mold, the optical fiber is inserted into the end mold, and the reflective end is made by heating;

[0033] Alternatively, a reflective layer is sputtered, chemically plated or electroplated on the end of the optical fiber, and then a polytetrafluoroethylene sleeve is put on, and the polytetrafluoroethylene sleeve is bonded or welded to the optical fiber;

[0034] Alternatively, a reflective layer is sputtered, chemically plated or electroplated on the inner wall of the polytetrafluoroethylene sleeve, and then the polytetrafluoroethylene sleeve is fitted onto the end of the optical fiber, and the polytetrafluoroethylene sleeve and the optical fiber are bonded or welded to each other;

[0035] Alternatively, a reflective layer is sputtered, chemically plated or electroplated on the end of the optical fiber, polytetrafluoroethylene composite powder is placed in a terminal mold, the optical fiber is inserted into the terminal mold, and heating is performed to form a reflective terminal.

[0036] The present invention provides an in vivo indicating optical fiber and a preparation method thereof, which can form a strip light source that emits light uniformly along the outer wall of the optical fiber axis, and the provided reflective end can further enhance the effect of the side wall light emission, and can clearly indicate the position of the pipeline in the human body, without the risk of damaging the body tissue while ensuring sufficient light intensity. The preparation method of the present invention is improved on the basis of the medical optical fiber in the prior art, forming a window section, reducing the reflectivity of the outer cladding of the optical fiber, and increasing the scattering rate, thereby achieving uniform light emission, indicating the position of the pipeline in the human body, and avoiding medical accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0038] Figure 1 It is a schematic diagram of the structure when the present invention is used.

[0039] Figure 2 It is a schematic diagram of the local structure of the optical fiber in the present invention.

[0040] Figure 3 FIG. 4 is another partial structural schematic diagram of the optical fiber in the present invention.

[0041] Figure 4 It is a schematic diagram of the main structure of the optical fiber preparation solution in the present invention.

[0042] Figure 5 It is a schematic diagram of the cross-sectional structure of another preparation scheme of the optical fiber in the present invention.

[0043] Figure 6 It is a schematic diagram of the cross-sectional structure of another preparation scheme of the optical fiber in the present invention.

[0044] Figure 7 It is a schematic diagram of the structure when preparing the reflective end in the present invention.

[0045] Figure 8 It is a partially enlarged schematic diagram of the reflective end in the present invention.

[0046] In the figure: optical fiber 1, core 101, outer cladding 102, window section 103, reflective end 11, ureter 2, indicator light source 3, endoscope 4, extrusion die 5, diamond chuck 6, end mold 7, manipulator 8, diamond wheel 9. DETAILED DESCRIPTION

[0047] Embodiment 1:

[0048] like Figures 1 to 3 , Figure 8 In the embodiment, a body indicating optical fiber is provided with a light-transmitting window section 103 on the side wall of the optical fiber 1, a reflective end 11 for reflecting light is provided at one end of the optical fiber 1, and the other end of the optical fiber 1 is used to connect to the indicating light source 3. In this example, a medical optical fiber is used, with a length of 0.7 to 1.2 meters and a diameter of 0.5 to 2.7 mm. Commonly used diameters include 0.5, 1, 1.2, 1.4, 1.7, 2, 2.4, and 2.7. By adopting the above structure, in the emission path of the indicator light source 3, part of the light escapes from the window section 103, thereby enhancing the brightness of the outer wall of the optical fiber 1. After the light is reflected by the reflective end 11, part of the light escapes from the window section 103, so that the outer wall of the optical fiber 1 emits light with higher light intensity. After detection, after setting the reflective end 11, the luminous intensity of the window section 103 can be increased by 30-70%. These escaped lights can penetrate the wall of the human body pipeline, and can better indicate the position of the ureter or other human body pipelines during laparoscopic surgery to avoid misoperation. In particular, by adopting this structure, it is possible to use an indicator light source 3 with higher light intensity without burning human tissue.

[0049] The preferred solution is Figure 2 , 3 In the embodiment, the optical fiber 1 comprises a core 101, a transparent outer cladding 102 is arranged outside the core 101, and the window section 103 is located in the outer cladding 102;

[0050] Preferably, the window section 103 is recessed in the outer cladding 102;

[0051] Preferably, the material of the wire core 101 is PMMA polymethyl methacrylate, PS polystyrene plastic or PC polycarbonate. In this example, PMMA is preferably used.

[0052] Preferably, the outer layer 102 is made of PTFE polytetrafluoroethylene, PVC polyvinyl chloride or PU polyurethane. In this example, PTFE is preferred.

[0053] In a preferred embodiment, the window section 103 has a frosted outer surface;

[0054] Or the window section 103 is a chemically corroded outer surface;

[0055] Alternatively, the window section 103 is a combination of multiple bubbles ablated by laser and located on or near the surface;

[0056] Alternatively, the window section 103 is one or more annular notches.

[0057] In the preferred solution, the core diameter is 0.2-2.5 mm, and the thickness of the outer cladding 102 is 0.1-1.225 mm. In this example, the core diameter is preferably 0.6-1.2 mm, and more preferably 0.8-1.0 mm; the thickness of the outer cladding 102 is determined according to the use requirements, and this structure ensures that the toughness of the optical fiber 1 meets the use requirements.

[0058] The preferred solution is Figure 2 , 3 In 8, the reflective end 11 is semicircular; this structure avoids damage to human tissue.

[0059] The preferred solution is Figure 8 In the embodiment, the reflective end 11 has an enlarged structure, which facilitates the reflective end 11 to pass through the human body pipes.

[0060] Preferably, the reflective end 11 is made of PTFE, PVC or PU.

[0061] In a preferred solution, a reflective layer is provided in the reflective end 11. With this structure, the light from the end of the optical fiber 1 can be reflected back again, thereby enhancing the light intensity of the window section 103.

[0062] In a preferred embodiment, a plurality of scales are provided on the outer wall of the optical fiber 1; these scales are mainly arranged at the entrance into the body and the part outside the body, so that the insertion depth can be easily controlled by this structure.

[0063] A seat body for connecting the indicator light source 3 is provided at the end of the other end of the optical fiber 1. The seat body in this example is a column sleeved on the optical fiber 1, and preferably, a buckle or groove is provided on the column to facilitate fixing the indicator light source 3. Further preferably, a semi-transparent and semi-reflective coating is plated on one end of the optical fiber 1 where the indicator light source 3 is installed, which can reflect light again, and this structure can further improve the light intensity of the window section 103.

[0064] Embodiment 2:

[0065] Based on Example 1, a method for preparing the above-mentioned in vivo indicator optical fiber comprises the following steps:

[0066] s1, generating a light-transmitting window section 103 on the outer wall of the optical fiber 1;

[0067] s2, making a reflective end 11 at the end of the optical fiber;

[0068] Through the above steps, an in vivo indicator optical fiber with side wall light leakage is obtained.

[0069] Embodiment 3:

[0070] On the basis of Example 2, in a preferred solution, during the process of pulling the optical fiber 1, the outer wall of the optical fiber 1 is intermittently clamped by a diamond chuck 6, and the outer wall of the optical fiber 1 is ground by the diamond chuck 6 to form a window section 103;

[0071] Embodiment 4:

[0072] On the basis of Example 2, in a preferred scheme, the outer wall of the optical fiber 1 is intermittently ground with a diamond grinding wheel 9 to form a window section 103; further preferably, a robot 8 with at least two axes drives the high-speed rotating diamond grinding wheel 9 to grind the outer wall of the optical fiber 1. For one window section 103, at least three robots 8 evenly distributed along the circumference are set. Each robot 8 is located at a different workstation on the assembly line. That is, to process one window section 103, at least three robots 8 need to be set along the assembly line, and each robot 8 is distributed along the circumference at a spacing of 120°. After processing at three workstations, a complete annular window section 103 is completed. Figure 5 as shown in .

[0073] Embodiment 5:

[0074] Based on Example 2, in a preferred solution, a manipulator 8 with at least two axes drives a disc-shaped blade 9 to cut the outer wall of the optical fiber 1 in an annular shape to form a window section 103; see Figure 5 In this example, the diamond grinding wheel 9 in Example 4 is replaced by a disc-shaped blade 9.

[0075] Embodiment 6:

[0076] On the basis of Example 2, in a preferred solution, the outer wall of the optical fiber 1 is annularly ablated by the laser head 12 to form a window section 103. In this example, by rotating the optical fiber 1, the laser head 12 forms a plurality of pits on the outer wall of the optical fiber 1, and the plurality of pits constitute the annular window section 103. Further preferably, the laser head 12 forms bubbles between the outer cladding 102 and the core 101 of the optical fiber 1, so that the light passing through is transmitted, and this structure greatly improves the brightness of the window section 103. In an optional solution, there are multiple laser heads 12, which are arranged along the circumference, and this structure improves the processing efficiency.

[0077] Embodiment 7:

[0078] Based on the above embodiments, the preferred solution is as follows Figure 7In the embodiment, the end of the optical fiber 1 is cast with polytetrafluoroethylene powder, the polytetrafluoroethylene composite powder is placed in the end mold 7, the optical fiber 1 is inserted into the end mold 7, and the reflective end 11 is made by heating; the components of the polytetrafluoroethylene composite powder are 50-65 parts of polytetrafluoroethylene, 6-7 parts of phenolic resin or 6-7 parts of polyurethane, 10-20 parts of filler, 1-2 parts of phenyl o-hydroxybenzoate, 1-2 parts of p-phenylenediamine, and 15-18 parts of ethanol. As an optional solution, a higher ratio of polytetrafluoroethylene powder can also be used in this example.

[0079] Embodiment 8:

[0080] Based on Examples 1 to 6, the preferred solution is as follows Figure 8 In the process, a reflective layer 10 is prepared at the end of the optical fiber 1 by sputtering, such as titanium dioxide surface coating, chemical plating such as NI-P chemical plating or electroplating, such as silver electroplating. The reflective layer 10 includes a metal reflective layer and a non-metallic reflective layer represented by carbon, silicon dioxide or zirconium oxide. A polytetrafluoroethylene sleeve is then put on, and the polytetrafluoroethylene sleeve is bonded or welded to the optical fiber 1; non-toxic glue is used as an adhesive for bonding, and ultrasonic welding is used for welding.

[0081] Embodiment 9:

[0082] Based on Examples 1 to 6, the preferred solution is as follows Figure 8 In the process, a reflective layer 10 is formed on the inner wall of the polytetrafluoroethylene sleeve by sputtering, chemical plating or electroplating, and then the polytetrafluoroethylene sleeve is fitted onto the end of the optical fiber 1, and the polytetrafluoroethylene sleeve and the optical fiber 1 are bonded or welded to each other.

[0083] Embodiment 10:

[0084] Based on Examples 1 to 6, the preferred solution is as follows Figure 7 In the process, the end of the optical fiber 1 is provided with a reflective layer 10 by sputtering, chemical plating or electroplating, a polytetrafluoroethylene composite powder is placed in an end mold 7, the optical fiber 1 is inserted into the end mold 7, and a reflective end 11 is formed by heating.

[0085] Embodiment 11:

[0086] On the basis of the above embodiment, the optical fiber 1 is sleeved in a transparent catheter. With this structure, an optical fiber with a thinner diameter can be used, and due to the protection of the catheter, a more powerful infrared light source can be used. In particular, the end of the optical fiber 1 is located in the catheter, and no additional round head is required, which simplifies the processing difficulty, especially the processing difficulty of the reflective end. Under the premise of ensuring the indication of the position of the internal pipe, the deflection that is easy to pass through the human body pipe can also be obtained.

[0087] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for preparing an in vivo indicating optical fiber, wherein a light-transmitting window section (103) is provided on the side wall of the optical fiber (1), a reflective end (11) for reflecting light is provided at one end of the optical fiber (1), and the other end of the optical fiber (1) is used to connect to an indicating light source (3); The optical fiber (1) comprises a core (101), a transparent outer cladding (102) is provided outside the core (101), and the window section (103) is located in the outer cladding (102); The wire core diameter is 0.2-2.5 mm, and the outer cladding (102) thickness is 0.1-1.225 mm; The window section (103) is recessed in the outer cladding (102); The material of the wire core (101) is PMMA, PS or PC; The outer layer (102) is made of PTFE, PVC or PU; The optical fiber (1) is sleeved in a transparent urinary catheter; A plurality of scales are provided on the outer wall of the optical fiber (1); A seat body for connecting to an indicating light source (3) is provided at the other end of the optical fiber (1); the feature is that The following steps are involved: s1, generating a light-transmitting window section (103) on the outer wall of the optical fiber (1); The window section (103) has a frosted outer surface; Alternatively, the window section (103) is a chemically corroded outer surface; Alternatively, the window section (103) is a combination of multiple bubbles located on or near the surface by laser ablation; Alternatively, the window section (103) is one or more annular notches; In the process of pulling the optical fiber (1), the outer wall of the optical fiber (1) is intermittently clamped with a diamond chuck (6), and the outer wall of the optical fiber (1) is ground by the diamond chuck (6) to form a window section (103); Alternatively, the outer wall of the optical fiber (1) is intermittently ground with a diamond grinding wheel (9) to form a window section (103); Alternatively, the outer wall of the optical fiber (1) is cut in an annular shape using a disk-shaped blade (9) to form a window section (103); Alternatively, the outer wall of the optical fiber (1) is annularly ablated by a laser head (12) to form a window section (103); s2. Making a reflective end (11) at the end of the optical fiber; The end of the optical fiber (1) is cast with polytetrafluoroethylene powder, the polytetrafluoroethylene composite powder is placed in an end mold (7), the optical fiber (1) is inserted into the end mold (7), and heating is performed to form a reflective end (11); Alternatively, a reflective layer (10) is sputtered, chemically plated or electroplated on the end of the optical fiber (1), and then a polytetrafluoroethylene sleeve is put on the end of the optical fiber (1), and the polytetrafluoroethylene sleeve is bonded or welded to the optical fiber (1); Alternatively, a reflective layer (10) is sputtered, chemically plated or electroplated on the inner wall of the polytetrafluoroethylene sleeve, and then the polytetrafluoroethylene sleeve is fitted onto the end of the optical fiber (1), and the polytetrafluoroethylene sleeve and the optical fiber (1) are bonded or welded together; Alternatively, a reflective layer (10) is formed on the end of the optical fiber (1) by sputtering, chemical plating or electroplating, a polytetrafluoroethylene composite powder is placed in an end mold (7), the optical fiber (1) is inserted into the end mold (7), and heating is performed to form a reflective end (11); The reflective end (11) is semicircular; the reflective end (11) has an enlarged structure, which is convenient for passing through human body pipes; A reflective layer is provided inside the reflective end (11); The material of the reflective end (11) is PTFE, PVC or PU; Through the above steps, an in vivo indicator optical fiber with side wall light leakage is obtained.

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