CN108969095B - Laser ablation system for treating CTO lesions - Google Patents
Laser ablation system for treating CTO lesions Download PDFInfo
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- 239000000523 sample Substances 0.000 claims abstract description 34
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
- A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
- A61B18/24—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor with a catheter
- A61B18/245—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor with a catheter for removing obstructions in blood vessels or calculi
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/36—Image-producing devices or illumination devices not otherwise provided for
- A61B90/37—Surgical systems with images on a monitor during operation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00345—Vascular system
- A61B2018/00351—Heart
- A61B2018/00386—Coronary vessels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/36—Image-producing devices or illumination devices not otherwise provided for
- A61B90/37—Surgical systems with images on a monitor during operation
- A61B2090/373—Surgical systems with images on a monitor during operation using light, e.g. by using optical scanners
- A61B2090/3735—Optical coherence tomography [OCT]
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Abstract
The invention discloses a laser ablation system for treating CTO lesions, which comprises a guide catheter for guiding an imaging catheter and a laser ablation guide wire, an imaging catheter for imaging and scanning a lesion area, a laser generator and a laser ablation guide wire for carrying out laser ablation on the lesion area, and a balloon catheter for fixing the laser ablation guide wire, wherein the laser ablation guide wire comprises an optical fiber probe and a pressure sensor. The CTO imaging is carried out through the imaging catheter, the pressure sensor guides the balloon catheter to be positioned accurately, the optical fiber probe is controlled to emit laser, and a channel can be punched in a harder region of the CTO lesion area for multiple times, so that a guide wire can easily penetrate into and pass through the lesion area, the operation difficulty and operation time are greatly reduced, and the success rate of the operation is improved.
Description
Technical Field
The invention relates to the field of medical treatment, in particular to a laser ablation system for treating CTO lesions.
Background
The CTO (chronic total occlusion lesion refers to a lesion with forward blood flow TIMI 0 level of an occlusion vessel section and the occlusion time of the lesion is more than or equal to three months) of the CTO is about 1/5 of the total coronary angiography detection lesion, and compared with non-occlusion lesions, the CTO lesion interventional therapy has low surgical success rate and high incidence rate of complications, restenosis and reocclusion. Despite the continual emergence of new instruments and new techniques, CTO surgery success rates have increased significantly, but CTO lesions remain considered to be the biggest challenge in the current PCI treatment field. In recent years, the number of patients receiving PCI in China is increased, and the number of doctors engaged in coronary intervention is also in a rapid rising trend, but intervention levels are uneven among areas, particularly CTO treatment levels are greatly different, and the need for standardization is urgent. How to improve the success rate of the interventional treatment of the chronic total occlusion lesions and reduce the occurrence rate of the surgical complications is an unavoidable problem at present.
With the improvement of the technology of operators and the continuous accumulation of experience, and the application of some novel guide wires and instruments, the surgical success rate of the interventional therapy of the occlusion lesions is greatly improved, but the success rate is still lower than 80 percent. The most important reason for the failure of the interventional therapy operation of the occlusion lesion is that the guide wire cannot pass through the lesion, and although an operator can perform the interventional therapy by adopting the parallel guide wire technology, the see-saw technology or under the guidance of the IVUS, a part of the lesions cannot finish the operation by the traditional interventional therapy method, and the forward interventional therapy of the occlusion lesion seems to enter a bottleneck stage.
In recent years, some cardiac intervention specialists at home and abroad can not pass through the forward guide wire, if the target blood vessel of the patient has better side branch blood vessel supply, the reverse guide wire technology is adopted to reversely pass through the occlusion lesion, and the reverse guide wire can be used for: (1) a micro-channel is formed reversely, so that the forward guiding wire can enter the occlusion distal blood vessel; (2) as a marker of forward advancement of the guidewire or directly reversing the interventional procedure through the retrograde guidewire. The technology further improves the success rate of interventional therapy of the occlusion lesions.
In order to further increase the surgical success rate of occlusive lesions, many doctors and manufacturers constantly strive to try various new instruments. However, some of these devices have remained in the experimental stage either because their efficacy has not been significantly improved or associated with a higher incidence of complications such as Magnum/Magnarail systems, kensey catheters, ROTACS low speed directional atherectomy catheters, excimer laser guided wires, and the like. The instrument system commonly used in the occlusion lesion operation is as follows:
1. OCR Safe-Cross RF system
The Safe-Cross RF system uses optical coherence reflectometry to control the direction of advancement of the guide wire in occlusive lesions. The guide steel wire is 0.014' medium hardness guide steel wire, the head end of the guide steel wire can emit radio frequency energy, and a channel is formed in the occlusion lesion, so that the passage of other interventional therapeutic instruments is facilitated. Meanwhile, the head end of the guide wire can emit near infrared rays, when the head end of the guide wire is too close to the blood vessel wall (< 1 mm), a monitor of the system displays a red strip and gives out a warning, at the moment, the radio frequency energy at the head end of the guide wire can not be released, an operator readjust the trend of the guide wire, and if the direction is correct, the display displays a green strip. The success rate of the system in the difficult chronic occlusion lesions is 50% -60%, and the occurrence rate of coronary perforation is less than 1%.
2. Front tuner system
The frontfilter catheter has a blunt dissection occlusion lesion to create a forward channel for the interventional instrument to pass through the lesion. Currently used X-39front filter has a success rate of 50% -61.7% through occlusion lesions and a perforation incidence of 0.9% -1.9%.
The success rate of the front trunk in the tortuosity right crown is lower, but the front trunk has better clinical effect on the intractable occlusive restenosis in the stent.
3. Cross system
The Crosser system is a high-frequency mechanical recanalization device, which consists of a motor, a sensor, a transducer and a Crosser catheter, wherein the motor generates high-frequency current, and the transducer generates high-frequency vibration energy (20 kHz) to continuously vibrate and occlude the lesion. Registration studies in early europe and the united states indicate that the surgical success rate of the cross system is 63% with no complications of perforation. Recently, 80 patients were enrolled in a prospective Cross As First Therapy (CRAFT) study in both milan and cartap, which showed a 75% success rate of cross treatment for CTO lesions, a 6.3% incidence of serious adverse events in the heart between hospitalizations, 5% of which were non-ST elevation myocardial infarction, and 1.3% (1/80) of which were coronary perforations. However, this example of patient coronary perforation may not be related to Crosser, since the intraoperative procedure Crosser presents vessel perforation, and researchers speculate that this example of vessel perforation may be related to the guide wire.
4. Cross Point system
The cross point system is configured to retrieve or adjust the direction of penetration from a distally located IVUS probe and nitinol needle through a steering portion of a handle located at the tail of the catheter. When the guide steel wire enters the false cavity and can not pass through continuously, the system can be used, the direction of the puncture needle can be regulated through the IVUS on the system, the puncture needle can point to the true cavity and puncture the true cavity, the guide steel wire is placed into the true cavity of the blood vessel at the far end of the occlusion section through the nickel-titanium alloy needle, and then the interventional therapy is carried out. Recently, scholars have tried to use the cross point system and select coronary veins as the bypass channel to treat the occlusion lesions where the traditional interventional technique failed, i.e. percutaneous in situ coronary bypass.
5. Cross Boss & Stingray system
The CrossBoss catheter has a rounded distal tip (1 mm diameter) mounted to a flexible torsionally proximal shaft. The Crossboss catheter package is accompanied by a dedicated torque device secured at its proximal end. The distal end of the catheter is coated with a hydrophilic coating. The cross boss CTO dedicated penetrating microcatheter is adapted for use with a guidewire to access discrete sites of coronary and peripheral vasculature. The CrossBoss catheter, when used as part of a system comprising a CrossBoss CTO-specific penetrating microcatheter, a Stingray CTO-specific reentrant true lumen balloon dilation catheter, and a Stingray CTO-specific penetrating guidewire, is adapted for endoluminally positioning a conventional guidewire distal to a stenotic coronary lesion (including chronic total occlusion CTO) prior to PTCA or stent intervention. The CrossBoss catheter enables the guide wire to safely and quickly pass through the lesion under the vacuum cavity or the inner membrane, the Fast-Spin torque enables the CrossBoss catheter to quickly rotate to pass through the lesion, the shaft rod coiled by the multi-strand guide wire provides 1:1 torque conduction, and the noninvasive round head end reduces perforation risks; the Stinger system (balloon catheter and guide wire) can accurately position under the inner membrane, the guide wire returns to the true cavity from the lower part of the inner membrane, two wings of the flat balloon automatically encircle blood vessels under the inner membrane, the balloon is provided with two guide wire outlets with opposite directions, one outlet faces the true cavity, the guide wire can be selectively reentered into the true cavity, the preformed Stinger special guide wire is provided with a probe at the head end so as to reenter the true cavity, and two opaque marker bands are arranged on the guide wire for accurate positioning.
The five systems mentioned above are commonly used in modern times for performing operations for occluding lesions, and they have in common that a guidewire is used to penetrate the lesion area to effect vascular re-conduction, which has the following drawbacks: firstly, the operation difficulty is high and the operation time is long; second, the surgical path is not uniformly standardized; thirdly, the success rate of the operation of different operators is different; fourth, the surgical costs are high; fifth, the guide wire easily enters the false cavity, and causes great damage to the patient.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a brand-new laser ablation system.
The technical scheme adopted by the invention is as follows:
a laser ablation system comprising:
a hollow guide catheter for guiding the imaging catheter and the laser ablation guide wire;
an imaging catheter for imaging and scanning a lesion;
the laser ablation guide wire is used for carrying out laser ablation on a lesion area, and comprises an optical fiber probe and a pressure sensor;
the balloon catheter is sleeved outside the laser ablation guide wire, an expandable anchoring balloon is arranged at the front end part of the balloon catheter, and the laser ablation guide wire is positioned after the anchoring balloon is expanded.
As a further improvement of the technical scheme, the optical fiber probe consists of a single-mode optical fiber and a self-focusing optical fiber positioned at the light emitting end of the single-mode optical fiber, and the light emitting end face of the self-focusing optical fiber is ground into a sphere, so that the direction of an outgoing beam of the optical fiber probe is coaxial with a blood vessel, focusing of laser energy is facilitated, and the optical fiber probe can be used for opening a near-end harder region of CTO lesions.
As a further improvement of the above technical solution, the pressure sensor is an optical fiber sensor, and the optical fiber sensor and the optical fiber probe are arranged side by side.
Further, the optical fiber sensor is preferably a fiber bragg grating.
As a further improvement of the technical scheme, the pressure sensor is a piezoelectric film sensor, and a plurality of piezoelectric film sensors are symmetrically arranged outside the optical fiber probe. Preferably, the piezoelectric film sensor is provided with four sensors which are respectively arranged in the upper, lower, left and right directions of the optical fiber probe.
The invention also provides a use method of the laser ablation system, which comprises the following steps:
s1, continuously imaging and scanning blood vessels in a period before the blood vessels enter a lesion area along a placed guide catheter by using an imaging catheter, and accurately knowing the thickness degree of the blood vessels and the accurate position of the lesion area by OCT imaging;
s2, extracting the imaging catheter, inserting a laser ablation guide wire along the guiding catheter, before reaching the CTO lesion area, and then conveying the balloon catheter to the proximal end of the CTO lesion area along the laser ablation guide wire;
s3, injecting contrast agent between the blood vessel and the anchoring saccule through the guide catheter, and evacuating blood between the lesion area and the anchoring saccule;
s4, judging the relative positions of the optical fiber probe and the lesion area according to pressure information fed back by the pressure sensor in real time, adjusting the position of the anchoring balloon at the same time, and inflating/liquefying the anchoring balloon after determining the position to ensure that the anchoring balloon is inflated and fixed, so that the optical fiber probe of the laser ablation guide wire is coaxial with a blood vessel;
s5, controlling laser of a laser generator to be output along an optical fiber probe through feedback of a pressure sensor, and carrying out laser ablation on a lesion area;
s6, stopping the laser generator, pushing the laser ablation guide wire forwards, judging whether laser drilling needs to be continued or not according to feedback of the pressure sensor, and repeating the steps S5 and S6 until the target treatment effect is achieved if laser drilling needs to be continued.
In the above usage method, step S2 may determine the model of the anchoring balloon to be used and the position where the anchoring balloon should be placed according to OCT imaging of the imaging catheter.
In the above-described method of use, it is preferable that the anchor balloon is inflated with physiological saline after the position is determined in step S4.
The beneficial effects of the invention are as follows:
according to the laser ablation system provided by the invention, OCT imaging is carried out through the imaging catheter, the pressure sensor guides the accurate positioning of the balloon catheter, and the optical fiber probe is controlled to emit laser, so that a channel can be punched in a harder CTO lesion area for multiple times, and a guide wire can easily penetrate into and pass through the lesion area. The system has the following advantages:
1. the guide wire penetrates into the lesion area relatively simply, so that the probability of the guide wire entering into the false cavity and the branch vessel is reduced;
2. compared with the prior art that a hard guide wire is used for directly poking a lesion area to find a gap, the system can greatly reduce the operation difficulty and operation time and reduce the injury to human bodies;
3. the success rate of opening CTO lesions is improved;
4. the laser energy is controllable, and under different conditions, the depth and the times of laser drilling can be flexibly adjusted according to the pressure sensor, thereby being beneficial to improving the success rate of the operation.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a schematic cross-sectional view of one of the laser ablation guidewires.
Fig. 2 is a side cross-sectional view of the laser ablation guidewire of fig. 1.
Fig. 3 is a schematic view of the structure of a laser ablation guidewire secured by an anchoring balloon.
Detailed Description
The laser ablation system of the present invention is described in further detail below with reference to the drawings and the preferred embodiments.
The laser ablation system provided by the invention comprises a guide catheter, an imaging catheter, a laser generator and a laser ablation guide wire 1, and a balloon catheter 7. The guiding catheter is placed in a blood vessel of a human body and is used for guiding the imaging catheter and the laser ablation guide wire 1. The imaging catheter enters a human body through the guiding catheter, preferably, the imaging catheter is an OCT imaging catheter, an intracavity imaging system is used for imaging blood vessels, the positions of lesion areas and the thicknesses of the blood vessels are determined, balloon catheters with different specifications can be selected according to the thicknesses of the blood vessels, and the entering position of the laser ablation guide wire 1 is determined according to the positions of the lesion areas. The laser generator is controlled by a computer to emit laser, and the laser ablation guide wire 1 guides the laser to a lesion area and ablates the lesion area by the laser. The balloon catheter 7 is sleeved outside the laser ablation guide wire 1, the front end part of the balloon catheter 7 is provided with an expandable anchoring balloon 8, the laser ablation guide wire 1 is positioned after the anchoring balloon 8 is expanded, as shown in fig. 3, the balloon catheter 7 has obvious effect, namely, the balloon catheter is used for fixing the position, so that the laser ablation guide wire 1 and the blood vessel 9 are coaxial, namely, the laser is ensured not to deflect to cause damage to the blood vessel 9 when the lesion area 10 is ablated by using laser; at the same time, the anchoring balloon 8 has a structural characteristic that after the anchoring balloon is inflated and fixed, the laser ablation guide wire 1 of the middle cavity can be driven by a rear mechanical device to push the laser ablation guide wire 1 forward.
Referring to fig. 1 and 2, the laser ablation guide wire 1 comprises an optical fiber probe 2 and a pressure sensor 3, and a protective layer 4 covering the optical fiber probe 2 and the pressure sensor 3. The optical fiber probe 2 consists of a single-mode optical fiber 5 and a self-focusing optical fiber 6 positioned at the light-emitting end of the single-mode optical fiber 5, wherein the light-emitting end face of the self-focusing optical fiber 6 is ground into a sphere, so that the direction of an outgoing light beam of the optical fiber probe 2 is coaxial with a blood vessel, and focusing of laser energy is facilitated. The pressure sensor 3 is preferably a fiber bragg grating arranged side by side with the fiber optic probe 2: the fiber bragg grating sensor is the most widely used fiber optic sensor with the highest frequency, and can change the wavelength of the reflected light wave according to the change of environment or strain. When a spectrum of light is transmitted to the fiber bragg grating, each small section of fiber after the refractive index of the light is changed reflects only a specific wavelength of light, which becomes the bragg wavelength, and the equation is as follows:
λ b ＝2nΛ。
the laser ablation guide wire 1 is formed by connecting the fiber bragg grating and the fiber probe 2 in parallel and is coaxial with a blood vessel, the fiber bragg grating mainly directly abuts against the lesion position when the laser ablation guide wire 1 reaches the lesion region, and the fiber bragg grating is used for judging and detecting the relative position relationship between the far end of the laser ablation guide wire 1 and the lesion region by returning the pressure value in real time through the fiber sensor. The specific process is that when the laser ablation guide wire 1 is propped against the near end of a lesion area, the fiber Bragg grating is subjected to axial stress, corresponding changes can be generated, then the stressed force is visually reflected through a demodulation device, a doctor judges the relative position relationship between the laser ablation guide wire 1 and the lesion area according to the change condition of the force, and when the target position is reached, the laser generator is controlled to emit laser through a computer program, so that the lesion area is ablated.
Furthermore, the pressure sensor can also adopt a piezoelectric film sensor, preferably, the piezoelectric film sensor can be provided with four sensors which are respectively arranged in the upper, lower, left and right directions of the optical fiber probe, the functions of the piezoelectric film sensor are the same as those of the optical fiber Bragg grating, the piezoelectric film sensor is used for testing the pressure, and then the fixed position of the anchoring saccule and the release of laser energy are determined according to the feedback of the pressure.
The invention also provides a use method of the laser ablation system, which comprises the following steps:
s1, firstly, continuously imaging and scanning blood vessels in a period before the blood vessels enter a lesion area along a placed guide catheter, and accurately knowing the thickness degree of the blood vessels and the accurate position of the lesion area through OCT imaging;
s2, judging the model of an anchoring balloon to be used and the position where the anchoring balloon should be placed according to OCT imaging; extracting the imaging catheter, inserting a laser ablation guide wire along the guiding catheter, before reaching the CTO lesion area, and then conveying the selected balloon catheter to the proximal end of the CTO lesion area along the laser ablation guide wire;
s3, injecting contrast medium between the blood vessel and the anchoring balloon through the guide catheter, and evacuating blood between the lesion area and the anchoring balloon (the main reason for excluding blood is that laser cannot penetrate blood);
s4, judging the relative positions of the optical fiber probe and the lesion area according to pressure information fed back by the pressure sensor in real time, adjusting the position of the anchoring balloon at the same time, and filling physiological saline or other liquid into the anchoring balloon after determining the position, so that the anchoring balloon is inflated and tightly attached and fixed with the blood vessel wall, the optical fiber probe of the laser ablation guide wire and the blood vessel are coaxial, the ablation laser is released, the blood vessel is prevented from being damaged, and the occurrence of vascular perforation caused by the polarization is avoided;
s5, laser of a laser generator is controlled by a computer program to be output along an optical fiber probe through feedback of a pressure sensor, laser ablation is carried out on a lesion area, and a small hole is formed in the front of a region with a harder proximal end of the CTO lesion;
s6, stopping the laser generator, pushing the laser ablation guide wire forwards, judging whether laser drilling needs to be continued or not according to feedback of the pressure sensor, and repeating the steps S5 and S6 until the target treatment effect is achieved if laser drilling needs to be continued.
According to the laser ablation system provided by the invention, OCT imaging is carried out through the imaging catheter, the pressure sensor guides the accurate positioning of the balloon catheter, and the optical fiber probe is controlled to emit laser, so that a channel can be punched in a harder CTO lesion area for multiple times, and a guide wire can easily penetrate into and pass through the lesion area. The system has the following advantages:
1. the guide wire penetrates into the lesion area relatively simply, so that the probability of the guide wire entering into the false cavity and the branch vessel is reduced;
2. compared with the prior art that a hard guide wire is used for directly poking a lesion area to find a gap, the system can greatly reduce the operation difficulty and operation time and reduce the injury to human bodies;
3. the success rate of opening CTO lesions is improved;
4. the laser energy is controllable, and under different conditions, the depth and the times of laser drilling can be flexibly adjusted according to the pressure sensor, thereby being beneficial to improving the success rate of the operation.
The above is only a preferred embodiment of the present invention, and the technical solutions for achieving the object of the present invention by substantially the same means are all within the scope of protection of the present invention.
Claims (4)
1. A laser ablation system for treating CTO lesions, comprising:
a hollow guide catheter for guiding the imaging catheter and the laser ablation guide wire;
an imaging catheter for imaging and scanning a lesion;
the laser ablation guide wire comprises an optical fiber probe, a pressure sensor and a protective layer for coating the optical fiber probe and the pressure sensor, wherein the optical fiber probe consists of a single-mode optical fiber and a self-focusing optical fiber positioned at the light emitting end of the single-mode optical fiber, the light emitting end face of the self-focusing optical fiber is ground into a sphere, the pressure sensor is an optical fiber sensor, the optical fiber sensor and the optical fiber probe are arranged side by side, and the optical fiber sensor is an optical fiber Bragg grating;
the balloon catheter is sleeved outside the laser ablation guide wire, an expandable anchoring balloon is arranged at the front end part of the balloon catheter, and the laser ablation guide wire is positioned after the anchoring balloon is expanded;
the use method of the laser ablation system for treating CTO lesions is as follows:
s1, continuously imaging and scanning blood vessels in a period before the blood vessels enter a lesion area along a placed guide catheter by using an imaging catheter, and accurately knowing the thickness degree of the blood vessels and the accurate position of the lesion area by OCT imaging;
s2, extracting the imaging catheter, inserting a laser ablation guide wire along the guiding catheter, before reaching the CTO lesion area, and then conveying the balloon catheter to the proximal end of the CTO lesion area along the laser ablation guide wire;
s3, injecting contrast agent between the blood vessel and the anchoring saccule through the guide catheter, and evacuating blood between the lesion area and the anchoring saccule;
s4, judging the relative positions of the optical fiber probe and the lesion area according to pressure information fed back by the pressure sensor in real time, adjusting the position of the anchoring balloon at the same time, and inflating/liquefying the anchoring balloon after determining the position to ensure that the anchoring balloon is inflated and fixed, so that the optical fiber probe of the laser ablation guide wire is coaxial with a blood vessel;
s5, controlling laser of a laser generator to be output along an optical fiber probe through feedback of a pressure sensor, and carrying out laser ablation on a lesion area;
s6, stopping the laser generator, pushing the laser ablation guide wire forwards, judging whether laser drilling needs to be continued or not according to feedback of the pressure sensor, and repeating the steps S5 and S6 until the target treatment effect is achieved if laser drilling needs to be continued.
2. The laser ablation system for treating CTO lesions according to claim 1, wherein the pressure sensor is a piezoelectric thin film sensor, and the fiber optic probe is externally symmetrically provided with a plurality of piezoelectric thin film sensors.
3. The laser ablation system for treating CTO lesion according to claim 1, wherein in the step S2, the model of the anchoring balloon to be used and the position where the anchoring balloon should be placed are determined based on the imaging.
4. The laser ablation system for treating CTO lesions according to claim 1, wherein in step S4, the anchoring balloon is filled with physiological saline after the positioning.
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