Medical contact type optical fiber and medical laser device

Abstract

The utility model provides a medical contact type optical fiber and a medical laser device. The medical contact type optical fiber comprises an optical fiber body which is provided with a fiber core, a wrapping layer and a coating layer; and the optical fiber tail end is provided with a connecting part combined with the optical fiber body and a conical light-emitting part of which the conical surface and the tip end are light-emitting surfaces. The tail end of the optical fiber provided by the utility model is provided with the conical light-emitting part of which the conical surface and the tip end are light-emitting surfaces, so that multi-angle lateral light emitting can be realized.

Description

Technical Field

[0001] The utility model mainly relates to the field of laser devices, and particularly relates to a medical contact optical fiber and a medical laser device. Background Art

[0002] Due to its high energy, good directivity and precision, laser is increasingly used in soft tissue cutting, making laser surgery based on optical fiber transmission show great advantages in minimally invasive surgery or natural orifice surgery. In the prior art, laser wavelengths with low absorption will lead to low efficiency and deep thermal damage, and even problems such as inability to stop bleeding. Therefore, laser wavelengths with high absorption, high efficiency and relatively shallow cutting depth are often selected. However, the single-cut vaporization depth of high-absorption laser is relatively shallow, and it is often unable to achieve an ideal cutting effect when dealing with some scenarios that require deep cutting. The most important reason is that the laser emits forward along the optical fiber and will be blocked by the original tissue when cutting deeply. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a medical contact optical fiber and a medical laser device with small thermal damage, large cutting depth and high cutting accuracy.

[0004] To solve the above technical problem, the utility model provides a medical contact optical fiber, including: an optical fiber body having a core, a cladding and a coating layer; an optical fiber end having a connecting portion combined with the optical fiber body and a light-emitting portion in a conical shape with both the conical surface and the tip being light-emitting surfaces.

[0005] In an embodiment of the utility model, the optical fiber body has a terminal section adjacent to the optical fiber end, and the terminal section has a core, a cladding and a protective sleeve.

[0006] In an embodiment of the utility model, the optical fiber body has an end face, and the optical fiber end is joined to the end face of the optical fiber body.

[0007] In an embodiment of the utility model, the optical fiber end is fusion-welded to the end face of the optical fiber body.

[0008] In an embodiment of the utility model, the optical fiber end is formed by extending the core and cladding of the optical fiber body.

[0009] In an embodiment of the utility model, the terminal section further has an adhesive layer with a refractive index less than or equal to 1.4 between the cladding and the protective sleeve.

[0010] In an embodiment of the utility model, the radial dimension of the connecting portion is greater than the radial dimension of the cladding of the terminal section.

[0011] In an embodiment of the utility model, the taper of the optical fiber end is 6-16°.

[0012] In an embodiment of the present utility model, the surface of the fiber optic end is not covered with a photothermal material layer.

[0013] In an embodiment of the present utility model, the material of the fiber optic end is sapphire or quartz.

[0014] In an embodiment of the present utility model, the fiber optic end includes a core and a cladding, and the material of the core is quartz.

[0015] In an embodiment of the present utility model, the fiber optic body further has a protective layer located outside the coating layer.

[0016] The present utility model also provides a medical laser device, including: a laser light source; a medical contact fiber optic as in any of the previous embodiments, connected to the laser light source.

[0017] In an embodiment of the present utility model, the laser wavelength of the laser light source is 1900 - 1980 nm.

[0018] Compared with the prior art, the present utility model has the following advantages: The fiber optic end has a light-emitting portion that is conical and both the conical surface and the tip are light-emitting surfaces, which can achieve multi-angle lateral light emission. This fiber optic can especially have a good cutting effect on the side of the light emission under the wavelength conditions of high absorption at 1900 - 1980 nm, and the materials of sapphire or quartz have a higher melting point and higher strength. Description of the Drawings

[0019] The inclusion of the drawings is to provide a further understanding of the present application. They are incorporated and constitute a part of the present application. The drawings illustrate the embodiments of the present application and, together with this specification, serve to explain the principles of the present utility model. In the drawings:

[0020] Figure 1 It is a partial schematic view of the distal end of a medical contact fiber optic according to an embodiment of the present utility model.

[0021] Figure 2 It is a partial schematic view of the distal end of a medical contact fiber optic according to another embodiment of the present utility model.

[0022] Figure 3 It is a schematic view of the optical path of a medical contact fiber optic according to an embodiment of the present utility model.

[0023] Figure 4 It is a schematic view of the A - A cross-section of the middle section of a medical contact fiber optic according to an embodiment of the present utility model.

[0024] Figure 5 It is a schematic view of the B - B cross-section of the middle section of a medical contact fiber optic according to another embodiment of the present utility model.

[0025] Figure 6It is a schematic diagram of a medical laser device according to an embodiment of the present utility model. Detailed implementation manners

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the figures represent the same structure or operation.

[0027] As shown in the present application and the claims, unless the context clearly indicates an exceptional situation, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0028] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are usually based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0030] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the figure is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0031] In addition, it should be noted that the use of terms such as "first", "second", etc. to define components is merely for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the scope of protection of this application. Moreover, although the terms used in this application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of this application may be chosen by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of this description. In addition, it is required to understand this application not only through the actual terms used, but also through the meanings implied by each term.

[0032] Figure 1 is a partial schematic view of the distal end of a medical contact fiber optic according to an embodiment of the present utility model. Refer to Figure 1 As shown, the present utility model provides a medical contact fiber optic 10, including an optical fiber body 100 and an optical fiber end 200. The optical fiber body 100 has a core 110, a cladding 120, and a coating layer 130, and the optical fiber end 200 has a connecting portion 210 and a light-emitting portion 220.

[0033] In Figure 1In the illustrated embodiment, the dimensions of the optical fiber body 100 are uniform. The cladding 120 wraps around the surface of the core 110, and the coating layer 130 is located on the surface of the cladding 120. However, the dimensions of the optical fiber end 200 are non-uniform. Specifically, the connecting portion 210 is adapted to be combined with the optical fiber body 100, and the diameter of the connecting portion 210 is larger than that of the optical fiber body 100, and the light-emitting portion 220 is conical. It can be understood that in the conical light-emitting portion 220, as the laser propagates, the incident angle will become larger and larger, so that total reflection cannot occur in the light-emitting portion 220, and thus it escapes, making both its conical surface 221 and tip 222 become light-emitting surfaces, which can be used for the emission of the laser. The laterally emitted laser enables the medical contact optical fiber 10 to have the ability of transverse cutting, and the forward light emission from the tip 222 enables the medical contact optical fiber 10 to have the ability of depth cutting.

[0034] In the embodiment as Figure 1 shown, the optical fiber body 100 further has a terminal section 140 adjacent to the optical fiber end 200. The terminal section 140 also has a core 110 and a cladding 120. However, different from the rest of the optical fiber body 100, the outer layer of the cladding 120 of the terminal section 140 does not have a coating layer 130, but has a protective sleeve 141. Preferably, the protective sleeve 141 is made of stainless steel and can protect the terminal section 140.

[0035] Furthermore, in this embodiment, the protective sleeve 141 does not closely fit the outer surface of the cladding 120, but there is a gap between the protective sleeve 141 and the cladding 120, and an adhesive layer 142 is provided in this gap. The refractive index of the adhesive layer 142 satisfies ≤1.4. It is provided between the cladding 120 and the protective sleeve 141 and will not affect the laser light path in the optical fiber body 100 while playing a packaging role. Referring to Figure 1 shown, the thickness of the protective sleeve 141 is not uniform either. There is a concave portion on the inner side of the protective sleeve 141 at one end close to the optical fiber end 200, which is adapted to cooperate with the connecting portion 210 of the optical fiber end 200, and there is also an adhesive layer 142 between the connecting portion 210 and the protective sleeve 141.

[0036] Even further, in the embodiment as Figure 1 shown, the optical fiber body 100 has an end face 101, that is, Figure 1 the face of the terminal section 140 close to the optical fiber end 200, and the optical fiber end 200 is joined to the end face 101 of the optical fiber body 100 through the connecting portion 210. Preferably, in this embodiment, the radial dimension of the connecting portion 210 is larger than the radial dimension of the cladding 120 of the terminal section 140, and the optical fiber end 200 and the end face 101 of the optical fiber body 100 are connected by a fusion splicing method, and the light path of the laser in the fusion splicing part will not be distorted.

[0037] In this embodiment, the overall material of the optical fiber end 200 is sapphire or quartz, and the surface is not covered with a photothermal material layer, so that the optical fiber end 200 does not generate a large amount of heat during use. It can be understood that the medical contact optical fiber 10 provided by the present utility model cuts and treats the affected area through a laser, rather than heating the optical fiber body to a high temperature for ablation. Therefore, there is no need to provide a photothermal material layer.

[0038] Figure 2 It is a partial schematic diagram of the distal end of the medical contact optical fiber according to another embodiment of the present utility model. The medical contact optical fiber 10' in this embodiment also includes an optical fiber body 100' and an optical fiber end 200'. The optical fiber body 100' has a core 110', a cladding 120' and a coating layer 130'. The optical fiber end 200' has a connecting portion 210' and a light-emitting portion 220'. Different from the previous embodiment, the optical fiber end 200' and the optical fiber body 100' in this embodiment are integrated. The optical fiber end 200' includes a core 110' and a cladding 120' formed by the extension of the core 110' and the cladding 120' of the optical fiber body 100'. In this preferred embodiment, since the optical fiber end 200' and the optical fiber body 100' are integrated, the material of the core 110' of the optical fiber body 100' is the same as that of the optical fiber end 200', both of which are quartz or germanium-doped quartz. The material of the cladding 120' is fluorine-doped quartz or quartz. The production process of this design is simpler.

[0039] Figure 3 It is an optical path schematic diagram of the medical contact optical fiber according to an embodiment of the present utility model. With reference to Figures 1-3 As shown, the taper of the optical fiber end 200 or 200' in the medical contact optical fiber 10 or 10' provided by the present utility model is 6-16°, and the laser emission effect is better at this taper.

[0040] Figure 4 It is a mid-section schematic diagram of the medical contact optical fiber according to an embodiment of the present utility model. With reference to Figure 1 、 4 As shown, in this preferred embodiment, the optical fiber body 100 also has a protective layer 150 outside the coating layer 130. The protective layer 150 is arranged between the coating layer 130 of the optical fiber body 100 (except for the last section 140) and the protective sleeve 141, further improving the protection effect on the core 110. In this case, the mid-section (i.e., the part except for the last section 140) of the medical contact optical fiber 10 is as shown in Figure 4 As shown, from the inside to the outside, there are four layers: the core 110, the cladding 120, the coating layer 130 and the protective layer 150, and each layer is in close contact.

[0041] Figure 5It is a schematic cross-sectional view of the middle section of a medical contact fiber optic of another embodiment of the present utility model. In this preferred embodiment, the medical contact fiber optic 10 has an additional outer shell 160 added to the structure as shown in Figure 4 to provide better protection, and there is a gap S between the outer shell 160 and the protective sleeve 141. Further, the outer shell 160 is preferably made of polyetheretherketone (Plastics—Polyetheretherketone, PEEK).

[0042] Figure 6 It is a schematic diagram of a medical laser device of an embodiment of the present utility model.

[0043] The present utility model also provides a medical laser device 20, comprising: a laser light source 30 and a medical contact fiber optic 10 as shown in Figure 1 , and the medical contact fiber optic 10 is connected to the laser light source 30. In this preferred embodiment, the laser wavelength of the laser light source 30 is 1900 - 1980 nm with high absorption, and the medical contact fiber optic 10 / 10' can effectively reduce the laser output power required for this wavelength, and at the same time has good precision cutting and deep cutting capabilities. It can be understood that in some other embodiments of the present utility model, the medical laser device 20 may also include a laser light source 30 and a medical contact fiber optic 10' as shown in Figure 2 , and the present application does not make specific limitations here.

[0044] The basic concepts have been described above. Obviously, for those skilled in the art, the above disclosure of the utility model is only an example and does not constitute a limitation to the present application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to the present application. Such modifications, improvements, and corrections are proposed in the present application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of the present application.

[0045] At the same time, the present application uses specific terms to describe the embodiments of the present application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification is not necessarily the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the present application can be appropriately combined.

[0046] Similarly, it should be noted that, in order to simplify the description disclosed in the present application and thus help the understanding of one or more utility model embodiments, in the foregoing description of the embodiments of the present application, multiple features are sometimes merged into one embodiment, drawing or description thereof. However, this disclosure method does not mean that the features required by the subject matter of the present application are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the single embodiment disclosed above.

[0047] In some embodiments, numbers are used to describe components and the quantity of attributes. It should be understood that such numbers used for the description of embodiments are modified by the modifiers "about", "approximate" or "substantially" in some examples. Unless otherwise specified, "about", "approximate" or "substantially" indicate that the said numbers allow a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining the general number of digits. Although the numerical ranges and parameters used in some embodiments of the present application to confirm the breadth of their scope are approximate values, in specific embodiments, such numerical settings are as precise as possible within the feasible range.

[0048] Although the present application has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions can be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A medical contact optical fiber, characterized in that: include: The optical fiber body has a core, a cladding and a coating; The optical fiber end has a connecting portion combined with the optical fiber body and a light emitting portion which is tapered and has a tapered surface and a tip which are both light emitting surfaces.

2. The medical contact optical fiber according to claim 1, characterized in that: The optical fiber body has an end section adjacent to the end of the optical fiber, and the end section has a fiber core, a cladding and a protective sleeve.

3. The medical contact optical fiber according to claim 1 or 2, characterized in that: The optical fiber body has an end surface, and the optical fiber end is connected to the end surface of the optical fiber body.

4. The medical contact optical fiber according to claim 3, characterized in that: The optical fiber end is fused to the end face of the optical fiber body.

5. The medical contact optical fiber according to claim 1 or 2, characterized in that: The optical fiber end is formed by extending the core and cladding of the optical fiber body.

6. The medical contact optical fiber according to claim 2, characterized in that: The end section also has a glue layer between the cladding and the protective sleeve with a refractive index less than or equal to 1.

4.

7. The medical contact optical fiber according to claim 2, characterized in that: The radial dimension of the connecting portion is greater than the radial dimension of the cladding of the terminal section.

8. The medical contact optical fiber according to claim 1, characterized in that: The taper of the optical fiber end is 6-16°.

9. The medical contact optical fiber according to claim 1, characterized in that: The surface of the optical fiber end is not covered with a photothermal material layer.

10. The medical contact optical fiber according to claim 3, characterized in that: The material of the optical fiber end is sapphire or quartz.

11. The medical contact optical fiber according to claim 5, characterized in that: The optical fiber end includes a core and a cladding, and the core is made of quartz.

12. The medical contact optical fiber according to claim 1, characterized in that: The optical fiber body also has a protective layer located outside the coating layer.

13. A medical laser device, characterized in that: include: Laser light source; The medical contact optical fiber as described in any one of claims 1-12 is connected to the laser light source.

14. The medical laser device according to claim 13, characterized in that: The laser wavelength of the laser light source is 1900-1980nm.

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