CN111812788A - A medical optical fiber assembly applied to high-power high-photon energy laser - Google Patents

Abstract

The invention relates to a medical optical fiber component, in particular to a medical optical fiber component applied to high-power high-photon energy laser, which solves the technical problem that when the conventional medical optical fiber component transmits laser with the wavelength less than 500nm and the power more than 100W, an operation optical fiber is easy to burn due to organic substances of human bodies in operation adhered to a light outlet end of the operation optical fiber, so that the operation cannot be normally carried out. The medical optical fiber component comprises an optical fiber, an end face protection tube and a heat shrinkable tube; it is characterized in that: the far end of the optical fiber extends into the end face protection tube from the small end of the end face protection tube and does not extend out of the large end of the end face protection tube; the small end of the end face protection tube is fixedly connected with the outer side face of the far end of the optical fiber; the far end of the heat shrinkable tube is sleeved outside the optical fiber and the end face protection tube, and is fixedly connected with the large end of the end face protection tube; an annular gap fluid channel is formed between the heat shrink tube and the optical fiber; and fluid through holes are formed in the transition sections of the small end and the large end of the end face protection pipe.

Description

A medical optical fiber assembly applied to high-power high-photon energy laser

technical field

The invention relates to a medical optical fiber assembly, in particular to a medical optical fiber assembly applied to a high-power high-photon energy laser.

Background technique

When using the existing medical optical fiber components for surgery, once the light-emitting end face of the optical fiber contacts the soft tissue or is adsorbed by suspended tissue fragments, the laser will be absorbed by these organic substances adhered to the light-emitting end of the optical fiber. If the wavelength of the laser transmitted by the optical fiber is less than 500 nm, the adhered organic substances in the human body will have strong absorption and scattering effects on the high-photon energy laser, which will cause the laser energy to accumulate at the light-emitting end of the optical fiber and generate local high temperature. When the laser power exceeds 100W, this strong absorption will rapidly heat the light-emitting end face of the optical fiber, causing the avalanche of the surgical optical fiber from the light-emitting end face to the fiber body to be burned, making it impossible for doctors to carry out surgery normally.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a medical optical fiber assembly applied to a high-power high-photon energy laser, so as to solve the problem that the surgical optical fiber is easily adhered to the existing medical optical fiber assembly when the laser with a wavelength less than 500 nm and a power greater than 100 W is transmitted. The technical problem that the optical fiber is burnt due to the organic matter of the human body during the operation at the light output end, so that the operation cannot be carried out normally.

The technical scheme adopted by the present invention is a medical optical fiber assembly applied to a high-power high-photon energy laser, including an optical fiber, an end face protection tube and a heat-shrinkable tube; its special features are:

The distal end of the optical fiber extends into the small end of the end face protection tube, and does not extend out of the large end of the end face protection tube; the small end of the end face protection tube is fixedly connected with the outer side of the distal end of the optical fiber;

The distal end of the heat shrinkable tube is sheathed outside the optical fiber and the end face protection tube, and the distal end of the heat shrinkable tube and the big end of the end face protection tube are fixedly connected; an annular gap fluid channel is formed between the heat shrinkable tube and the optical fiber; the A fluid passage hole is arranged at the transition section between the small end and the large end of the end face protection tube.

Further, in order to generate an effective positive pressure area, the light-emitting end face of the optical fiber will not contact the vaporized target soft tissue or absorb the suspended tissue debris during the operation, causing the light-emitting end of the fiber to burn, but also make the light-emitting end of the optical fiber. It is close enough to the target soft tissue to achieve the required laser power density on the surface of the target soft tissue, and the distance between the light-emitting end face of the optical fiber and the large end face of the end face protection tube is 0.5 mm to 2 mm.

Alternatively, the ratio of the distance between the light exit end face of the optical fiber and the large end face of the end face protection tube and the inner hole diameter of the large end of the end face protection tube is 0.5-1 times the tangent of the light receiving cone angle of the optical fiber. In this way, the large end face of the end face protection tube just does not block light, which meets the treatment needs, and the light emitting end face of the optical fiber will not contact the tissue or absorb suspended tissue debris, which can better protect the light emitting end face of the optical fiber.

Further, in order to keep the relative distance between the light-emitting end face of the optical fiber and the large end face of the end face protection tube unchanged, the small end of the end face protection tube is fixedly connected to the quartz cladding of the distal end of the optical fiber.

Further, the small end of the end face protection tube and the quartz cladding of the distal end of the optical fiber are fixedly connected by welding or UV curing glue. When using UV-curable adhesives, choose adhesives that can effectively reflect light with a wavelength of less than 500 nm after UV curing, so as to avoid laser leakage or aggregation from the bond and improve the reliability of the bond in use.

Further, the distal end of the heat-shrinkable tube is heat-shrinkable and fixed to the outside of the big end of the end face protection tube, and the heat-shrinkable fixing part does not exceed the end face of the big end.

Further, in order to facilitate processing and the structure is simple, the transition section is a tapered structure or a stepped structure.

Further, the wavelength of the high-power high-photon energy laser is 400nm-500nm, and the average power is greater than 100W.

Further, in order to facilitate the manipulation of the optical fiber, and the effect of forming a positive pressure fluid at the light output end of the optical fiber is better, the optical fiber assembly may further include a handle;

The handle is provided with a water outlet pipe, an optical fiber through hole and a water connection joint;

The proximal end of the water outlet pipe is fixedly connected or integrated with the distal end of the handle, and the distal end of the water outlet pipe extends out of the handle;

The optical fiber via hole is communicated with the inner cavity of the water outlet pipe;

The large end of the water-passing joint protrudes from the proximal end of the handle for externally connecting a fluid source; the small end of the water-passing joint is communicated with the inner cavity of the water outlet pipe; the pipe hole on the end face of the large end of the water-passing joint is cross-sectional The area is greater than the cross-sectional area of the fluid channel;

The proximal end of the optical fiber extends out of the heat shrinkable tube, passes through the water outlet pipe and the optical fiber through hole in sequence, and then extends out of the handle, and the outer side of the optical fiber is sealed and connected with the inner surface of the optical fiber through hole;

The proximal end of the heat-shrinkable tube is sheathed outside the distal end of the water outlet tube, and the two are fixedly connected by heat-shrinkage sealing.

Further, in order to simplify the processing, the optical fiber via hole and the water outlet pipe are arranged coaxially.

The beneficial effects of the present invention are:

(1) The medical optical fiber assembly of the present invention is an optical fiber assembly applied to a medical laser with a laser wavelength less than 500 nm and a power greater than 100 W. First, use the end face protection tube and positive pressure fluid flush mode. The positive pressure fluid flows through the light-emitting end face of the optical fiber through the fluid channel, and the light-emitting end face of the optical fiber is retracted into the end-face protection tube, so that the light-emitting end of the optical fiber is completely wrapped by the positive pressure fluid, so as to avoid intraoperative organic matter such as surgical residues being adsorbed on the light-emitting end face of the optical fiber; Secondly, the positive pressure fluid flows through the light-emitting end face of the optical fiber through the fluid channel. At the end of the fluid channel, the flow channel suddenly expands, creating jet streamlines, forming a positive pressure area in front of the light-emitting end face of the optical fiber, which can suspend the optical fiber near the light-emitting end face. The tissue debris is rinsed more efficiently, and an isolation area is formed to prevent the suspended debris in the water environment from being adsorbed on the light-emitting end face of the optical fiber, which can further effectively prevent the vaporized tissue during the operation from adhering to the light-emitting end face of the optical fiber, causing the optical fiber to emit light. The end is damaged and the optical fiber is burned; in addition, the end-face protection tube is double-fixed with the outer part and the heat-shrinkable tube, and the inner part and the optical fiber, so as to prevent the end-face protection tube from falling off and improve the reliability; The light-emitting end face absorbs the suspended tissue debris, causing the laser energy to gather and heat up at the light-emitting end of the fiber, causing the light-emitting end of the fiber to burn, and making the light-emitting end of the fiber close enough to the target soft tissue to achieve the required laser power density on the surface of the vaporized target soft tissue. Therefore, the present invention solves the problem that when the existing medical optical fiber assembly transmits laser light with a wavelength less than 500 nm and a power greater than 100 W, the surgical optical fiber is easily burned due to the intraoperative organic matter of the human body adhered to the light-emitting end, so that the operation cannot be performed normally. Ongoing technical issues.

(2) It is preferred in the present invention that the small end of the end-face protection tube is fixedly connected with the quartz cladding at the far end of the optical fiber, and the optical fiber is located in the part outside the end-face protection tube, and the optical fiber coating layer is retained, so that the optical fiber can be protected without affecting the optical fiber assembly. the therapeutic effect.

(3) In the present invention, it is preferred that the small end of the end face protection tube and the quartz cladding of the distal end of the optical fiber are fixedly connected by welding or UV curing glue. When using UV-curable adhesives, choose adhesives that can effectively reflect light with a wavelength of less than 500 nm after UV curing, so as to avoid laser leakage or aggregation from the bond and improve the reliability of the bond in use.

Description of drawings

1 is a schematic structural diagram of an embodiment of the present invention;

Fig. 2 is a partial enlarged view at I in Fig. 1;

Fig. 3 is the front view of the end face protection pipe in the embodiment of the present invention;

Fig. 4 is the top view of Fig. 3;

Fig. 5 is the left side view of Fig. 3;

6 is a schematic diagram of a fluid streamline when using a medical fiber optic assembly applied to a high-power high-photon energy laser according to an embodiment of the present invention;

FIG. 7 is a partial enlarged view of II in FIG. 6 .

The description of each label in the figure is as follows:

1-handle, 10-fiber via, 2-fiber, 21-light end face, 22-coating, 23-quartz cladding, 3-heat shrink tube, 4-end face protection tube, 41-fluid via, 5 -Fluid channel, 51-Water connection, 52-Water outlet, 53-Diffusion streamline, 54-Pressure water head.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1 , a medical optical fiber assembly applied to a high-power high-photon energy laser of the present invention includes an optical fiber 2 , an end face protection tube 4 and a heat shrinkable tube 3 . The high-power high-photon energy laser mentioned here refers to the laser with the wavelength less than 500nm and the power greater than 100W. Generally, for better therapeutic effect, the wavelength of the high-power high-photon energy laser is generally preferred to be 400 nm to 500 nm, and the average power is greater than 100 W.

Referring to FIG. 1 , the distal end of the optical fiber 2 extends into the small end of the end face protection tube 4 and does not protrude from the large end of the end face protection tube 4 ; In order to generate an effective positive pressure area, the light-emitting end face 21 of the optical fiber 2 will not absorb the suspended debris, causing the laser energy to gather and heat up at the light-emitting end of the optical fiber 2, causing the light-emitting end of the optical fiber 2 to be burned, and making the light-emitting end of the optical fiber 2 burn out. The light-emitting end is close enough to the target soft tissue to not affect the treatment effect. The distance between the light-emitting end face 21 of the optical fiber 2 and the large end face of the end face protection tube 4 can preferably be 0.5 mm to 2 mm. The ratio of the distance between the light-emitting end face 21 of the optical fiber 2 and the large end face of the end face protection tube 4 to the inner hole diameter of the large end of the end face protection tube 4 is 0.5 to 1 times the tangent of the light receiving cone angle of the optical fiber 2 . In order to protect the optical fiber 2 without affecting the therapeutic effect of the optical fiber assembly, in this embodiment, it is preferred that the part of the optical fiber 2 located outside the end face protection tube 4 retains the coating layer 22, and the part inside the end face protection tube 4 is stripped of the coating layer. The cladding 22, the small end of the end face protection tube 4 is fixedly connected with the quartz cladding 23 at the far end of the optical fiber 2 to prevent the optical fiber 2 from being burnt due to overheating of the coating layer 22 of the optical fiber 2. In order to ensure that the transmitted laser light will not leak and gather from the connection between the optical fiber 2 and the end face protection tube 4, in this embodiment, the small end of the end face protection tube 4 and the quartz cladding 23 at the far end of the optical fiber 2 are bonded by UV curing glue In this way, the stress of the UV glue after the curing of the optical fiber 2 is very small, which avoids the light leakage of the optical fiber 2 at the bonding place, and the cured UV glue can effectively reflect the high-photon energy laser, which is anti-aging and flame retardant. effect. In addition to the UV-curable adhesive bonding and fixing in this embodiment, it can also be fixed by welding. The outer diameter of the coating layer 22 of the optical fiber 2 selected in this embodiment is 1.1 mm. After the coating layer 22 is peeled off, the outer diameter of the inner quartz cladding layer 23 is 0.845 mm. The wall thickness of the end face protection tube 4 is about 0.2 mm, the length is about 15 mm, the inner diameter of the small end is about 0.85 mm, and the inner diameter of the large end is about 1.8 mm.

Referring to FIG. 1 , in order to facilitate the manipulation of the optical fiber 2 , the medical optical fiber assembly applied to the high-power high-photon energy laser in this embodiment preferably further includes a handle 1 . The handle 1 is provided with a water outlet pipe 52, an optical fiber through hole 10 and a water connector 51; the proximal end of the water outlet pipe 52 is fixed or integrated with the distal end of the handle 1, and the distal end of the water outlet pipe 52 extends out of the handle 1; The inner cavity of the water outlet pipe 52 is communicated; the large end of the water passage joint 51 protrudes from the proximal end of the handle 1 for external fluid source; the small end of the water passage joint 51 is communicated with the inner cavity of the water outlet pipe 52; The cross-sectional area of the tube hole on the end face is larger than the cross-sectional area of the fluid channel 5; the proximal end of the optical fiber 2 extends out of the heat shrinkable tube 3, passes through the water outlet pipe 52 and the optical fiber through hole 10 in sequence, and then extends out of the handle 1, and the optical fiber 2 The outer side of the heat-shrinkable tube 3 is tightly connected with the inner surface of the optical fiber via hole 10; In this embodiment, the handle 1 is a fibrous imitation cone-shaped handle, the water outlet pipe 52 and the handle 1 are integrally designed, the optical fiber through hole 10 and the water outlet pipe 52 are coaxially arranged, and the handle 1 and the optical fiber 2 are snap-fastened (the snap Not shown in the figure), the water-passing joint 51 is in the shape of a funnel that is large at one end and small at the other. In this way, the water-passing joint 51 generates a pressure head and a velocity head for the fluid channel 5. Since the cross-sectional area of the pipe hole on the large end face of the water-passing joint 51 is larger than the cross-sectional area of the fluid channel 5, the pressure loss of the entire fluid channel can be compensated. , and the contact angle of the material of the heat shrinkable tube 3 with the fluid is preferably close to 90 degrees, which reduces the capillary action and reduces the surface tension of the fluid. When transferring fluids, the viscosity should be reduced and the flow rate should be reduced.

Referring to FIG. 2 , it can be clearly seen from FIG. 2 that the partial structure of the end face protection tube region in this embodiment. The distal end of the heat shrinkable tube 3 is sheathed outside the optical fiber 2 and the end surface protection tube 4 , and the distal end of the heat shrinkable tube 3 is fixedly connected with the large end of the end surface protection tube 4 . In this embodiment, the distal end of the heat-shrinkable tube 3 is heat-shrinked and fixed to the outside of the big end of the end face protection tube 4, and the heat-shrinkable fixing part does not exceed the end face of the big end. In this embodiment, preferably, the distal end face of the heat shrinkable tube 3 is flush with the middle section of the large end of the end face protection tube 4 , and may also be flush with the large end face of the end face protection tube 4 . An annular gap fluid channel 5 is formed between the heat shrinkable tube 3 and the optical fiber 2 . In this embodiment, the heat shrinkable tube 3 has a length of about 300 mm, an outer diameter of 2.3 mm, an inner diameter of 2 mm, low elasticity, and is made of FEP semi-rigid plastic.

Referring to FIG. 3, FIG. 3 is a front view of the end face protection tube in the embodiment of the present invention. One or more fluid passage holes 41 are provided at the transition section between the small end and the big end of the end face protection tube 4 , and preferably the number of fluid passage holes 41 is two and uniformly distributed. In this embodiment, the transition section between the small end and the large end of the end face protection tube 4 is preferably a tapered structure, and may also be a stepped structure.

Referring to FIG. 4 , FIG. 4 is a top view of the end face protection tube in the corresponding embodiment of the present invention when FIG. 3 is a front view.

Referring to FIG. 5 , FIG. 5 is a left side view of the end face protection tube in the corresponding embodiment of the present invention when FIG. 3 is a front view. The fluid passage holes 41 are uniformly distributed, and their contour sections preferably have the same curvature.

Referring to FIG. 6 , FIG. 6 is a schematic diagram of the fluid flow line of a medical optical fiber assembly applied to a high-power high-photon energy laser according to an embodiment of the present invention. In this embodiment, the fluid channel 5 belongs to the gap flow with a relatively small cross-sectional area. Since the light-emitting end of the optical fiber 2 is retracted into the end face protection tube 4, the fluid wraps the light-emitting end face of the optical fiber when the end of the fluid channel 5 flows out, and forms a strong diffusion flow. Line 53. The diffusion streamlines 53 are formed by the radial diffusion of the positive pressure fluid turbulent mode toward the optical axis of the optical fiber 2 .

Referring to FIG. 7 , it can be clearly seen from FIG. 7 that when the medical optical fiber assembly applied to the high-power high-photon energy laser according to the embodiment of the present invention is used, the schematic diagram of the streamline of the fluid in the end face protection tube area. The fluid at the end of the fluid channel 5 forms a diffusion streamline 53 due to the sudden expansion of the inner boundary of the flow (the outer boundary remains unchanged). The diffusion streamline 53 will form a positive pressure area on the light-emitting end face 21 of the optical fiber 2 , the pressure of which is derived from the residual pressure of the pressure head 54 connected to the water connector 51 passing through the fluid channel 5 . The distance between the light-emitting end face 21 of the optical fiber 2 and the large end face of the end face protection tube 4 affects the divergence angle of the diffusion streamline 53, thereby affecting the pressure distribution in the positive pressure region.

The medical optical fiber assembly applied to the high-power high-photon energy laser of the present invention can be used reliably and safely under the laser conditions of the ultraviolet to blue spectrum with the wavelength less than 500 nm and the power greater than 100 W.

Claims (10)

1. A medical optical fiber component applied to high-power high-photon energy laser comprises an optical fiber (2), an end face protection tube (4) and a heat-shrinkable tube (3); the method is characterized in that:

the far end of the optical fiber (2) extends into the end face protection tube (4) from the small end of the end face protection tube, and does not extend out of the large end of the end face protection tube (4); the small end of the end face protection tube (4) is fixedly connected with the outer side face of the far end of the optical fiber (2);

the far end of the heat shrinkable tube (3) is sleeved outside the optical fiber (2) and the end face protection tube (4), and the far end of the heat shrinkable tube (3) is fixedly connected with the large end of the end face protection tube (4); an annular gap fluid channel (5) is formed between the heat shrinkable tube (3) and the optical fiber (2); and fluid through holes (41) are formed at the transition sections of the small end and the large end of the end face protection pipe (4).

2. The medical optical fiber assembly applied to high-power high-photon energy laser according to claim 1, wherein: the distance between the light-emitting end face (21) of the optical fiber (2) and the large-end face of the end face protection tube (4) is 0.5-2 mm.

3. The medical optical fiber assembly applied to high-power high-photon energy laser according to claim 1, wherein: the ratio of the distance between the light-emitting end face (21) of the optical fiber (2) and the large-end face of the end face protection tube (4) to the diameter of the large-end inner hole of the end face protection tube (4) is 0.5-1 time of the tangent value of the light receiving cone angle of the optical fiber (2).

4. The medical optical fiber assembly applied to high-power high-photon energy laser according to any one of claims 1 to 3, wherein: and the small end of the end face protection tube (4) is fixedly connected with the quartz cladding (23) at the far end of the optical fiber (2).

5. The medical optical fiber component applied to high-power high-photon energy laser according to claim 4, wherein: and the small end of the end face protection tube (4) is fixedly connected with the quartz cladding (23) at the far end of the optical fiber (2) through welding or UV curing adhesive bonding.

6. The medical optical fiber assembly applied to high-power high-photon energy laser according to claim 5, wherein: the far end of the heat shrinkable tube (3) is fixed with the outer part of the large end of the end face protection tube (4) in a heat shrinkable mode, and the position of the heat shrinkable fixed part does not exceed the end face of the large end.

7. The medical optical fiber assembly applied to high-power high-photon energy laser according to claim 5, wherein: the transition section is of a conical structure or a step structure.

8. The medical optical fiber assembly applied to high-power high-photon energy laser according to claim 1, wherein: the wavelength of the high-power high-photon energy laser is 400 nm-500 nm, and the average power is more than 100W.

9. The medical optical fiber assembly applied to high-power high-photon energy laser according to claim 7, wherein:

also comprises a handle (1);

the handle (1) is provided with a water outlet pipe (52), an optical fiber through hole (10) and a water connector (51);

the near end of the water outlet pipe (52) is fixedly connected with or integrated with the far end of the handle (1), and the far end of the water outlet pipe (52) extends out of the handle (1);

the optical fiber via hole (10) is communicated with the inner cavity of the water outlet pipe (52);

the big end of the water connector (51) extends out of the near end of the handle (1) and is used for being externally connected with a fluid source; the small end of the water connector (51) is communicated with the inner cavity of the water outlet pipe (52); the cross-sectional area of the pipe hole of the large-end face of the water-passing joint (51) is larger than that of the fluid channel (5);

the near end of the optical fiber (2) extends out of the heat-shrinkable tube (3), sequentially penetrates through the water outlet pipe (52) and the optical fiber through hole (10), and then extends out of the handle (1), and the outer side surface of the optical fiber (2) is hermetically connected with the inner surface of the optical fiber through hole (10);

the near end of the heat shrinkable tube (3) is sleeved outside the far end of the water outlet pipe (52), and the heat shrinkable tube and the water outlet pipe are fixedly connected through heat shrinkage sealing.

10. The medical optical fiber assembly applied to high-power high-photon energy laser according to claim 9, wherein: the optical fiber via hole (10) and the water outlet pipe (52) are coaxially arranged.

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