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CN-224206888-U - Optical fiber catheter and laser ablation system

CN224206888UCN 224206888 UCN224206888 UCN 224206888UCN-224206888-U

Abstract

The disclosure discloses an optical fiber catheter and a laser ablation system, wherein the optical fiber catheter comprises an optical fiber, an outer tube, and an optical fiber, wherein the outer tube is sleeved outside the optical fiber, one end of the outer tube is a closed end, a first distance is reserved between the closed end and the far end of the optical fiber, the far end of the optical fiber is one end, close to the closed end, of the optical fiber, and the outer diameter of the outer tube is 1.0-2.5mm. By the scheme of the present disclosure, the accuracy of treatment can be improved, trauma and complications are reduced, and the comfort level of a patient is improved.

Inventors

  • FANG XIAOWU
  • Xia Liangdao
  • CAO PENG

Assignees

  • 杭州佳量医疗科技有限公司

Dates

Publication Date
20260508
Application Date
20241231

Claims (14)

  1. 1. A fiber optic catheter, comprising: An optical fiber (10); The optical fiber device comprises an outer tube (20), wherein the outer side of the optical fiber (10) is sleeved with the outer tube, one end of the outer tube (20) is a closed end, a first distance is reserved between the closed end and the far end of the optical fiber (10), the far end of the optical fiber (10) is one end, close to the closed end, of the optical fiber (10), and the outer diameter of the outer tube (20) is 1.0-2.5mm.
  2. 2. The fiber optic catheter of claim 1, further comprising: an inner tube (30), the inner tube (30) being sleeved outside the optical fiber (10) and located between the optical fiber (10) and the outer tube (20), and A first channel (40) is formed between the inner tube (30) and the optical fiber (10), and a second channel (50) is formed between the inner tube (30) and the outer tube (20).
  3. 3. The fiber optic catheter of claim 2, wherein the cross-sectional shape of the optical fiber (10) is a first shape, the cross-sectional shape of the outer tube (20) is a second shape, the cross-sectional shape of the inner tube (30) is a third shape, wherein The first shape is different from the third shape, and the second shape is different from the third shape.
  4. 4. The fiber optic catheter of claim 3, wherein the fiber optic catheter is, A second distance (L2) between the outer side of the optical fiber (10) and the inner side of the inner tube (30) is 0-0.065 mm, wherein the second distance is the distance between the outer side of the optical fiber (10) and the inner side of the inner tube (30) at the closest distance; A third distance (L3) between the outer side of the inner tube (30) and the inner side of the outer tube (20) is 0-0.04 mm, wherein the third distance is the distance between the outer side of the inner tube (30) and the inner side of the outer tube (20) at the closest distance.
  5. 5. The fiber optic catheter of claim 3 or 4, wherein, The first shape and the second shape are both circular, the third shape is polygonal, and The outer side of the optical fiber (10) abuts against the inner side portion of the inner tube (30), and the outer side of the inner tube (30) abuts against the inner side portion of the outer tube (20).
  6. 6. The fiber optic catheter of claim 2, further comprising: A first seal (31), the first seal (31) being disposed at a proximal end of the inner tube (30) for sealing the first channel (40), the proximal end of the inner tube being an end of the inner tube remote from the closed end; And a second sealing element (21), wherein the second sealing element (21) is arranged at the proximal end of the outer tube (20) and is used for sealing the second channel (50), and the proximal end of the outer tube is the other end of the outer tube opposite to the closed end.
  7. 7. The fiber optic catheter of claim 6, further comprising: a first connecting pipe (32) with one end connected with the inner pipe (30) so as to be communicated with the first channel, wherein a first cooling pipe (33) is sleeved outside the other end of the first connecting pipe (32); A second connecting pipe (22) one end of which is connected with the outer pipe (20) so as to be communicated with the second channel, a second cooling pipe (23) is sleeved outside the other end of the second connecting pipe (22), A third sealing element (24) is arranged between the second connecting pipe (22) and the second cooling pipe (23), and/or a fourth sealing element (34) is arranged between the first connecting pipe (32) and the first cooling pipe (33), The outer surface of the third sealing element (24) and/or the fourth sealing element (34) is stepped in one or more stages.
  8. 8. The fiber optic catheter of claims 6 or 7, further comprising a marker tube (60), the marker tube (60) comprising a marker segment (61) and an extension segment (62); The marking section (61) is arranged as a straight pipe, and scales are arranged on the marking section (61); the extension section (62) comprises a narrow end and a wide end, the inner diameter of the extension section increases along the direction from the narrow end to the wide end, the narrow end is connected with one end of the marking section (61), and the other end of the marking section (61) is connected with the first sealing element (31), so that the optical fiber extends into the inner tube (30) through the marking tube (60) and the first sealing element (31).
  9. 9. The fiber optic catheter of claim 1, wherein the fiber optic catheter is configured to receive a fiber optic probe, -A third channel (70) is provided between the optical fiber (10) and the outer tube (20); a fourth channel (80) extending in the axial direction of the outer tube (20) is provided in the tube wall of the outer tube (20), and the fourth channel (80) communicates with the third channel (70).
  10. 10. The fiber optic catheter of claim 1, wherein the fiber optic catheter is configured to receive a fiber optic probe, The first distance (L1) is 0-2 mm, and/or The outer diameter of the outer tube (20) is 1.5-1.6 mm.
  11. 11. The fiber optic catheter of claim 1 or 10, wherein, The outer diameter of the outer tube (20) is 1.55mm.
  12. 12. The fiber optic catheter according to claim 1, wherein the optical fiber (10) is movably and/or rotatably connected with the outer tube (20).
  13. 13. The fiber optic catheter of claim 2, further comprising a first fastener and a second fastener, wherein, The first fastener is sleeved on the outer side of the optical fiber (10), and the outer side of the first fastener is connected with the inner side of the inner tube (30); The second fastener is sleeved on the outer side of the optical fiber (10), is positioned between the proximal end of the optical fiber and the first fastener in the axial direction of the optical fiber, and is used for clamping the optical fiber (10) in the circumferential direction of the optical fiber so as to fix the optical fiber (10), and the proximal end of the optical fiber is one end of the optical fiber far away from the closed end.
  14. 14. A laser ablation system comprising the fiber optic catheter of any one of claims 1-11.

Description

Optical fiber catheter and laser ablation system Technical Field The present disclosure relates generally to the field of medical devices. More particularly, the present disclosure relates to a fiber optic catheter and laser ablation system. Background Laser ablation is a high-precision medical technology, and utilizes the energy of laser to locally ablate pathological tissues so as to achieve the aim of treatment. Laser ablation is based on thermal sensitivity of biological tissue, with selective ablation of lesions or structures by heat released by the laser. The technology can be guided by medical imaging technologies such as magnetic resonance imaging (Magnetic Resonance Imaging, MRI) and the like, so that accurate positioning and treatment are realized. The technology has wide application in the fields of tumor treatment, vascular disease treatment and the like. During laser ablation, the fiber plays a vital role. The optical fiber can be used as a transmission medium of laser to transmit laser energy to a focus area in a human body, and focus tissue is coagulated and necrotized or even gasified by the thermal effect of the laser, so that the treatment purpose is achieved. The transmission characteristics of the optical fiber ensure the efficient and nondestructive transmission of laser energy, so that the laser ablation technology can realize high-precision and high-efficiency treatment. However, the existing optical fiber is generally thick, and may cause great puncture damage in the process of puncturing, thereby causing complications such as pneumothorax, hemorrhage and the like. In addition, when the optical fiber is thick, it is not easy to pass through a narrow space, and thus it may not be possible to accurately reach a lesion site. In view of the foregoing, there is a need for a fiber optic catheter and laser ablation system that provides improved treatment accuracy and reduced trauma and complications. Disclosure of utility model To address at least one or more of the technical problems mentioned above, the present disclosure proposes, in various aspects, a fiber optic catheter and a laser ablation system. In a first aspect, the present disclosure provides an optical fiber catheter comprising an optical fiber, an outer tube sleeved outside the optical fiber, wherein one end of the outer tube is a closed end, a first distance is provided between the closed end and a distal end of the optical fiber, wherein the distal end of the optical fiber is one end of the optical fiber close to the closed end, and an outer diameter of the outer tube is 1.0-2.5mm. In some embodiments, the fiber optic catheter further comprises an inner tube that is sleeved outside the optical fiber and between the optical fiber and the outer tube, and forms a first channel between the inner tube and the optical fiber and a second channel between the inner tube and the outer tube. In some embodiments, the optical fiber has a first shape in cross-section, the outer tube has a second shape in cross-section, and the inner tube has a third shape in cross-section, wherein the first shape is different from the third shape, and the second shape is different from the third shape. In some embodiments, a second distance between the outside of the optical fiber and the inside of the inner tube is 0-0.065 mm, wherein the second distance is a distance between the outside of the optical fiber and the inside of the inner tube that is closest to both, and a third distance between the outside of the inner tube and the inside of the outer tube is 0-0.04 mm, wherein the third distance is a distance between the outside of the inner tube and the inside of the outer tube that is closest to both. In some embodiments, the first shape and the second shape are both circular, the third shape is polygonal, and the outer side of the optical fiber abuts the inner side portion of the inner tube and the outer side of the inner tube abuts the inner side portion of the outer tube. In some embodiments, the fiber optic catheter further comprises a first seal disposed at a proximal end of the inner tube for sealing the first passageway, the proximal end of the inner tube being an end of the inner tube remote from the closed end, and a second seal disposed at a proximal end of the outer tube for sealing the second passageway, the proximal end of the outer tube being an end of the outer tube opposite the closed end. In some embodiments, the optical fiber catheter further comprises a first connecting pipe, one end of the first connecting pipe is connected with the inner pipe so as to be communicated with the first channel, a first cooling pipe is sleeved outside the other end of the first connecting pipe, one end of the second connecting pipe is connected with the outer pipe so as to be communicated with the second channel, a second cooling pipe is sleeved outside the other end of the second connecting pipe, a third sealing piece is arranged between the second con