CN211403675U - Simulation training device for atrial fibrillation radio frequency ablation operation - Google Patents

Abstract

The utility model discloses an atrial fibrillation radio frequency ablation operation simulation training device, which comprises a controller, a driver, an actuating motor, a motion conversion mechanism, a motion platform, an atrium model and a model from femoral vein to inferior vena cava; the arrangement positions of the atrium model and the model from the femoral vein to the inferior vena cava conform to the anatomical structure of a human body, and the atrium model is fixed on the motion platform; the controller is connected with the driver, a pulse output port of the driver is connected with the execution motor, and the driver reads a control program of the controller and drives the execution motor to move; the actuating motor drives the motion platform to do reciprocating motion along the human body front median line direction in the human body anatomical structure through a motion conversion mechanism. The atrial fibrillation radio frequency operation simulation training device can accurately and truly simulate the displacement influence of the respiration of a patient on an atrium in an actual operation, and the displacement of an ablation large head and the pressure change caused by the displacement.

Description

Simulation training device for atrial fibrillation radio frequency ablation operation

Technical Field

The utility model relates to a simulation training device for operation, in particular to a simulation training device for simulating atrial fibrillation radio frequency ablation operation.

Background

Atrial fibrillation refers to the phenomenon that the atria lose normal and effective contraction due to the disordered electrical activity of the atria and the rapid and uncoordinated weak peristalsis of the cardiac muscles. According to statistics, the prevalence rate of adults in China is 0.77%, and about ten million patients with atrial fibrillation exist. As the incidence rate of atrial fibrillation increases with the increase of age, the total number of patients with atrial fibrillation further increases with the aging process of the population in China. Compared with normal people, atrial fibrillation has high fatality rate and disability rate, and seriously threatens the health and life quality of human beings.

The means for treating atrial fibrillation mainly comprise two types of medical treatment and surgical treatment. The problems of long-term administration of the medicine for patients, great side effect, poor compliance and the like exist in the medicine treatment. The methods of surgical treatment are electrical cardioversion and ablation: electrical cardioversion can only temporarily stop atrial fibrillation and cannot reduce recurrence of atrial fibrillation; ablation is to apply a certain form of energy to cardiac muscle, to make the cardiac muscle lose electrophysiological functions, to block the action of electrical signals to melt a reentry circuit or to eliminate abnormal lesions, thereby reducing or even radically curing the recurrence of atrial fibrillation. The most used at present is invasive ablation with interventional catheters. The energy used includes: radio frequency, cryo, microwave, laser, and high intensity focused ultrasound, among others, radio frequency is most used. Due to the electrical sensitivity of cardiac muscle, the radio frequency ablation selects electromagnetic waves with the frequency range of 450kHz to 3MHz, and the output power does not exceed 100W; the heat effect of alternating current on organisms is utilized to heat the myocardial tissues on ectopic excitement foci or reentry rings in the electrode range to 60-100 ℃, so that cell protein is denatured and coagulation necrosis occurs to lose functions, but the activity of normal myocardial cells outside the electrode range cannot be influenced by radio frequency ablation.

Although the curative effect of the atrial fibrillation radio frequency ablation operation is definite, the operation process is complex, the risk is high, once complications such as left atrial perforation, atrial esophageal fistula and the like occur, the death rate is close to 100 percent, and only a few three hospitals can independently complete the operation at present; the difficulty of the whole operation process mainly lies in the operation of a catheter, the occurrence of serious complications is closely related to the inexperience of the operation of the catheter, an operator does not know the structure of the left atrium, the position and the direction of the catheter in a three-dimensional navigation mode are not clear, the relative movement of a sheath tube and the catheter cannot be correctly understood and the like are the main reasons of the complications in the operation, in view of the complexity of atrial fibrillation ablation operation, the learning period is about 5 years, even if the anatomical structure of the left atrium and the using method of a three-dimensional navigation (CARTO3) system are mastered, hundreds of cases of operation practices are still needed for cultivating a skilled operator, so the technical learning period is long, the learning cost is high, and particularly, the high risk in the operation process causes a plurality of students to be difficult to authorize to independently perform the operation. These factors ultimately lead to difficulties in the spread of this technology.

At present, a radio frequency ablation simulation operation model is only to fix an atrial model on a bracket, and a hose is used for simulating the communication between a femoral vein and the atrial model so as to simulate the operation environment of atrial fibrillation. The existing operation simulation mode has obvious defects. (1) The difference from the actual operation environment and situation is great: in the actual operation process, the breathing of a patient can seriously interfere the operation process, so that an operator can judge the ablation site of the catheter wrongly, the head end of the catheter is displaced or the pressure is increased suddenly, and the main reason for puncturing the atrium in the operation center is shown. Because the existing simulation model is only a static model and is greatly different from the actual operation process, an operator cannot perceive the actual operation situation through the model, and the purpose of simulation cannot be achieved. (2) At present, the atrium model is generally made of common silica gel materials, the materials are soft, the puncture aperture of the atrial septal part of the left atrium cannot be enlarged, once the aperture is enlarged, the atrium collapses, therefore, an operator can only use a catheter to penetrate through the atrial septal puncture hole to perform simulation operation in the simulation, and cannot be compatible with a long sheath, but in the actual operation, pulmonary vein isolation and linear ablation of the left atrial roof and the isthmus can be realized only by the mutual matching and relative movement of the long sheath and the catheter, the existing model cannot help the operator to understand the relative movement of the sheath and the catheter, so that the simulation of the actual operation condition (3) that the existing atrium model is only an atrium model with a normal structure cannot be realized, the shapes of the left atria of different patients in the actual operation process are different, the atria of some patients obviously enlarge, the pulmonary artery expands, and the ridge of the left lung is narrower, some lower right lungs are extremely low, some upper right lungs are anterior, the uncertainty of the operation is increased due to the changeful structure of the left atrium, and the operation cannot be simulated by a single normal left atrium model. (4) Skin and subcutaneous tissues at a femoral vein puncture position and a tortuous position of a femoral vein are often wrapped by a long sheath in an actual operation, so that the torsion for rotating the long sheath is difficult to be completely transmitted to a head end, an operator needs abundant experience to give the most appropriate torsion to overcome the obstacle, the rotation degree of the long sheath is not too much or too little, and the rotation degree is one of the difficulties of the operation. The problems in the prior art are all the difficult problems affecting the simulation and training of the radio frequency ablation operation.

In the chinese utility model with patent No. ZL 201520006539.8, an in vitro radiofrequency ablation simulation device is disclosed, comprising a radiofrequency ablation catheter, a heart simulation device, a physiological saline perfusion device, a pressure control device, a radiofrequency instrument and a blood peristaltic pump, wherein the radiofrequency ablation catheter is respectively connected to the physiological saline perfusion device, the pressure control device and the radiofrequency instrument; the heart simulating device is connected with the blood peristaltic pump. The device disclosed in the patent is not used for simulating surgical operation, is mainly used for observing the damage degree of the ablation large head to the cardiac muscle under the conditions of different wattages and different blood flow, and is used for scientific parameter research. Therefore, the device cannot be used for restoring and simulating the real operation environment.

Therefore, how to solve the above problems in the prior art is a hot spot of research by those skilled in the art.

Disclosure of Invention

The utility model aims to solve the technical problem that a can really simulate the radio frequency ablation operation of quivering in the room different shape left atrium motion state and the different degree tissue feedback of parcel in femoral vein puncture position under various breathing modes lets the operator can really feel feeling and the technical difficulty of operation to can be to the radio frequency operation simulation trainer of quivering of technical difficulty training repeatedly.

In order to achieve the above object, the utility model adopts the following technical scheme:

an atrial fibrillation radio frequency ablation operation simulation training device comprises a controller, a driver, an execution motor, a motion conversion mechanism, a motion platform, an atrial model and a model from femoral vein to inferior vena cava; the arrangement positions of the atrium model and the model from the femoral vein to the inferior vena cava conform to the human anatomy structure, and the atrium model is fixed on the motion platform; the controller is connected with the driver, a pulse output port of the driver is connected with the execution motor, and the driver reads a control program of the controller and drives the execution motor to move; the actuating motor drives the motion platform to do reciprocating motion along the human body front median line direction in the human body anatomical structure through the motion conversion mechanism.

Preferably, the controller is a PLC controller.

Preferably, the driver is an actuator motor driver.

Preferably, the motion conversion mechanism comprises a coupling, a screw rod, a nut seat, a screw rod sleeve and a fixed frame, and the execution motor and the screw rod sleeve are fixed on the fixed frame; the output shaft of the execution motor is connected with the top end of the screw rod through a coupler, the bottom end of the screw rod is sleeved with the screw rod sleeve, the nut seat is sleeved on the screw rod, and the motion platform is fixed on the upper surface of the nut seat.

Preferably, the actuating motor is a servo motor or a stepping motor.

Preferably, the femoral vein model further comprises an adjusting support with adjustable height, wherein a fixing platform is arranged on the top surface of the adjusting support, a clamping ring fixedly connected with the fixing platform is arranged on the fixing platform, and the femoral vein model to inferior vena cava model is clamped in the clamping ring and fixedly connected with the fixing platform.

Wherein preferably, be equipped with the parcel ware on femoral vein to the inferior vena cava model, the parcel ware comprises annular silica gel circle, double-end connecting pipe and backstop cap, the double-end connecting pipe comprises first connecting pipe and second connecting pipe, first connecting pipe diameter is less than second connecting pipe diameter, first connecting pipe with femoral vein is connected to the femoral vein open end of inferior vena cava model, annular silica gel circle set up in the second connecting pipe, the backstop cap cover is located outside the second connecting pipe and in second connecting pipe fixed connection, be equipped with the through-hole on the backstop cap, the through-hole diameter is less than annular silica gel circle external diameter and this through-hole can supply the sheath pipe for the operation to pass through.

Wherein preferably the atrial model and/or the femoral vein to inferior vena cava model are reconstructed from patient CT data.

Preferably, the reconstruction method comprises the following steps: (1) reconstructing an atrium model by software based on CT data of a patient, then exporting the data, carrying out data restoration processing, restoring a real structure of the data, and finally importing the data into UG NX software to design an atrium model mold; (2) printing the mold through a 3D printer; (3) injecting silica gel into the mold, curing and demolding.

Preferably, the atrium model and/or the femoral vein to inferior vena cava model are/is made of a silica gel material with the hardness of 30A, the breaking elongation of 300%, the tensile strength MPa of 4.5 +/-0.5 and the tearing strength KN/m of 12 +/-2.

Preferably, a fixing support is arranged at the bottom of the atrium model and consists of a fixing column and a base; one end of the fixing column is fixedly connected with the bottom of the atrium model, and the other end of the fixing column is fixedly connected with the base; the top surface of the moving platform is provided with a groove matched with the base in shape, and the edge of the groove is provided with a plurality of rotating blocking pieces.

Preferably, the model from the femoral vein to the inferior vena cava consists of an inferior vena cava model, a left femoral vein model and a right femoral vein model, and the open end of the inferior vena cava model is connected with a hard tube.

The utility model has the advantages as follows:

(1) the atrial fibrillation radio frequency operation simulation training device can accurately and truly simulate the displacement influence of the respiration of a patient on an atrium in an actual operation, and the displacement of an ablation large head and the pressure change caused by the displacement. Through the experiment contrast, breathe the pressure change curve that melts the major part that arouses in the real operation with the utility model discloses the change curve that causes is unanimous basically, makes the simulation operator can receive the influence that the breathing melts the atrial fibrillation by reality, through adaptation gradually and understanding this influence to skilled reply is breathed the interference to the operation.

(2) The atrial model and the model from the femoral vein to the inferior vena cava of the atrial fibrillation radio frequency operation simulation training device are reconstructed by CT data of the atrium and the femoral vein to the inferior vena cava of a patient, and can be atrial models in various different forms instead of a normal atrial structure in the prior art, so that a simulation operator can be familiar with and master the three-dimensional anatomical characteristics of the atria in different forms and find out sites and reasons of ablation difficulty in the atria, a corresponding solution is made, and the actual operation is used for verification.

(3) This atrial fibrillation radio frequency operation simulation trainer's atrial model and femoral vein to inferior vena cava model are made by specific silica gel material, and the texture of this silica gel is close with real atrium to make the pipe operation in the student's the true operation of maximum acquisition feel. The model prepared by the material can be compatible with the simulation operation of the catheter and the long sheath in the operation, the problem of collapse of the atrium model caused by the entering of the sheath tube can be avoided, a simulation operator can use the catheter and the long sheath to be matched with each other for practice, the simulation operator is helped to understand the relative movement of the sheath tube and the catheter in the atrial fibrillation ablation operation, and the operator is skilled in mastering complex operation manipulations such as recurvation, U inversion and the like.

(4) The utility model provides a wrapper, annular silica gel circle thickness in the wrapper is adjusted to the accessible, and the tactile feedback of femoral vein puncture department tissue parcel sheath pipe in the real simulation art makes the art person can be familiar with and deal with the operation difficulty that blood vessel tortuosity and puncture department tissue parcel caused.

Drawings

FIG. 1 is a schematic view of the structure of the simulation training device for atrial fibrillation radio frequency surgery;

FIG. 2 is a schematic diagram of the top view of the simulation training device for atrial fibrillation radio frequency surgery;

FIG. 3 is a top view of a motion platform in the simulation training device for atrial fibrillation radio frequency surgery;

FIG. 4 is a control schematic diagram of the simulation training device for atrial fibrillation radio frequency surgery;

fig. 5 is a first schematic structural diagram of embodiment 2 of the present invention;

fig. 6 is a second schematic structural diagram of embodiment 2 of the present invention;

FIG. 7 is a graph of pressure change of an ablation head caused by respiration during a real operation;

fig. 8 is a pressure change curve of the ablation large head caused by respiration according to the present invention.

The reference numbers in the figures illustrate:

the device comprises a controller 1, a driver 2, a stepping motor 3, a motion conversion mechanism 4, a coupler 41, a lead screw 42, a nut seat 43, a lead screw sleeve 44, a fixed frame 45, a motion platform 5, a groove 51, a rotary baffle plate 52, an atrium model 6, a fixed support 61, a fixed column 62, a base 63, a femoral vein to inferior vena cava model 7, an inferior vena cava model 71, a left femoral vein model 72, a right femoral vein model 73, a rigid tube 74, an adjusting support 8, a fixed platform 81, a clamping ring 82, a wrapper 9, an annular silicone ring 91, a double-head connecting tube 92, a first connecting tube 921, a second connecting tube 922 and a stop cap 93.

Detailed Description

To make the above objects, features and advantages of the present invention more obvious to those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the described embodiments are only some embodiments, not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

The embodiment of the utility model provides an in the controller that uses be the QRXQ PLC touch-sensitive screen all-in-one programmable controller of production of end core company. The atrium model motion mode program is mainly used for writing an atrium model motion mode program, wherein the atrium model motion mode program comprises the moving distance, the moving time and the like, program signals are output to the driver to be used for driving the actuator to move, and other commercially available controllers capable of playing the function can be applied to the utility model.

The embodiment of the utility model provides an in the embodiment used driver be the bright core DK-1 digital step motor driver RXS-42 straight line module of the bright core of QRXQ company production. The main function of this driver is used for reading controller control procedure then output pulse signal and give step motor drive step motor motion, the utility model provides an in the controller can be placed in to the driver, other drivers that can play this function of market all can be applied to the utility model discloses a.

The embodiment of the utility model provides a step motor and motion conversion mechanism that use are the QRXQ ball screw straight line module RXS60 of producing of end core company, and step motor passes through rotation angle regulation slip table displacement after the driver pulse signal is mainly accepted to this module, and other modules that can play this function of market all can be applied to the utility model discloses a motor and motion conversion mechanism are good.

In the embodiment of the present invention, the direction of motion is "up" and "down" determined by the head and foot directions of the human anatomy, the "up" is proximal, and the "down" is proximal relative to the "up".

Example 1

As shown in fig. 1 to 4, the simulation training device for atrial fibrillation rf ablation operation provided by the embodiment of the present invention includes a controller 1, a driver 2, an execution motor 3, a motion conversion mechanism 4, a motion platform 5, an atrium model 6, and a femoral vein-to-inferior vena cava model 7.

The atrial fibrillation radio frequency ablation operation simulation training device utilizes the cooperation of the controller 1, the driver 2, the execution motor 3, the motion conversion mechanism 4 and the motion platform 5 to drive the atrial model 6 to linearly translate and move so as to truly simulate the condition of the vertical movement (head-foot direction) of the atrium caused by the respiration of a patient in a radio frequency ablation operation. The device of present breathing simulation is many, but present breathing simulation is all simulation human lung respiratory motion, the utility model discloses an one of invention point is the dynamic influence of different breathing modes of true simulation patient to the left atrium, therefore lung among the prior art breathes analogue means and is not applicable to the utility model discloses. The inventor utilizes X-ray to acquire the distance and the speed of the upper and lower displacements of the atrium under different respiration degrees in real patient operation, and specific data are shown in Table 1. In a real radio frequency ablation operation, the influence of the respiration of a patient on the atrium has the characteristics of the patient, the atrium is highest (closest to the head side) when the patient exhales, and the height of the atrium at the end of expiration is fixed; the atrium position is lowest (proximal to the foot) and not fixed during inspiration, depending on the size of the respiration rate.

TABLE 1

According to the theory, the inventor fixes the atrium model 6 on the moving platform 5, and the femoral vein to inferior vena cava model 7 is arranged below the atrium model 6 according to the human anatomical structure. The atrium model 6 and the femoral vein to inferior vena cava model 7 are not connected, and the atrium model 6 and the femoral vein to inferior vena cava model 7 are kept at a certain distance, so that the femoral vein to inferior vena cava model 7 is prevented from being influenced in the moving process of the atrium model 6, and the femoral vein to inferior vena cava model 7 is in a static state in an actual operation, so that the movement is not needed in the simulation process. The model 7 from the femoral vein to the inferior vena cava is composed of an inferior vena cava model 71, a left femoral vein model 72 and a right femoral vein model 73 which are communicated with each other and arranged in a Y shape, and the open end of the inferior vena cava model 71 faces to the atrium model. The left femoral vein model 72 and the right femoral vein model 73 are primarily intended to facilitate the practice of atrial fibrillation ablation procedures performed through the right or left femoral vein by a trainer.

In the simulation training device for the atrial fibrillation radio frequency ablation operation, the femoral vein to inferior vena cava model 7 is fixed on a fixing platform 81 arranged on the top surface of a height-adjustable adjusting support 8, the height of the adjusting support is adjustable, and the femoral vein to inferior vena cava model 7 can be adjusted to be at the same horizontal height with the atrial model 6. The fixed platform 81 is provided with a plurality of snap rings 81 which are fixedly connected, and the model 7 from the femoral vein to the inferior vena cava is clamped in the snap rings 82 and is fixedly connected with the fixed platform 81. The snap ring 82 is of an unclosed circular ring structure, the diameter of the snap ring is slightly smaller than the diameters of the inferior vena cava model 71, the left femoral vein model 72 and the right femoral vein model 73, the inferior vena cava model 71, the left femoral vein model 72 and the right femoral vein model 73 can be placed in the snap ring through the openings of the snap ring 82 and clamped, and the snap ring can be taken out through the openings when being disassembled. The open end of the inferior vena cava model from the femoral vein to the inferior vena cava model 7 is connected with a rigid tube 74, the rigid tube 74 can be made of plastic materials, and the rigid tube 74 is used for supporting the sheath and preventing the sheath from floating when entering the atrium model through the inferior vena cava model in the training process.

The controller 1 is a human-computer interaction device, and a control program is written by the controller 1, namely the movement distance and the movement time of the movement platform are controlled according to the data in the table 1.

The driver 2 is a pivot of the controller 1 and the actuator motor 3, and drives the actuator motor to move by reading a control program of the controller 1.

The actuating motor 3 is a power mechanism of the whole device, and the original power for moving the device moving platform 5 is provided by the movement of the actuating motor 3. In the embodiment of the present invention, the actuator motor adopted by the inventor is a stepping motor, and a servo motor and the like can also be adopted. The embodiment of the utility model provides an in, step motor's theory of operation does: the stepping motor is controlled by a pulse signal from the driver 2, each time the stepping motor rotates a certain angle, each time the movement angle is determined by the subdivision set by the driver 2, for example, the device subdivides the set value to 1600, namely 1600 times the stepping motor rotates one circle.

This radio frequency ablation operation simulation trainer of atrial fibrillation still includes motion conversion mechanism 4, and motion conversion mechanism 4's function is the horizontal motion who converts step motor rotary motion into motion platform 5, therefore all can realize the motion conversion mechanism of above-mentioned function and all can be applied to the utility model discloses. In the simulation training device for the atrial fibrillation radio frequency ablation operation, the motion conversion mechanism 4 comprises a coupler 41, a screw rod 42, a nut seat 43, a screw rod sleeve 44 and a fixing frame 45, and the execution motor 3 and the screw rod sleeve 44 are fixed on the fixing frame 45; the output shaft of the actuating motor 3 is connected with the top end of the screw rod 42 through the coupler 41, the bottom end of the screw rod 42 is sleeved in the screw rod sleeve 44, the nut seat 43 is sleeved on the screw rod 42, and the nut seat 43 is fixedly connected with the moving platform 5. The screw 42 is a ball screw, and a nut matched with the ball screw is arranged in the nut seat 43.

The moving platform 5 is an actuating mechanism of the atrial fibrillation radio frequency ablation operation simulation training device and is used for driving the atrium model 6 to move so as to realize the function of simulating the movement of the left atrium along with respiration in a real operation.

When the atrial fibrillation radio frequency operation simulation training device is applied, firstly, a control program is written through the controller 1 according to data in the table 1, after the driver 2 reads the control program in the controller 1, a corresponding pulse signal is output, the stepping motor receives the pulse signal to perform rotary motion of a corresponding angle, the screw rod 42 in the motion conversion mechanism 4 is driven to synchronously rotate, the screw rod 42 rotates to drive the nut seat 43 and the motion platform 5 fixed with the nut seat to perform translational motion, the atrial model 6 is fixed with the motion platform, and therefore the atrial model 6 performs translational motion corresponding to program distance and time. The direction of the translational motion is the human body anterior midline direction in the human body anatomical structure, and can also be understood as the direction along the head-foot direction of the human body, then according to the moving distance and time in the table 1, the atrium model 6 makes programmed motion, in the motion program of the atrium model, the highest point (near head side) of the motion of the atrium model 6 is fixed, the highest position is fixed when the human body exhales in the simulated respiration process, the lowest point of the atrium model 6 is not fixed, and the atrium position is low and not fixed when the human body inhales according to the data in the table 1 by moving the corresponding distance. The design of the simulation training device for the atrial fibrillation radio frequency ablation operation can truly simulate the influence of a patient on an atrium under a breathing state in the radio frequency ablation operation.

In the simulation training device for the atrial fibrillation radio frequency ablation operation, an atrium model 6 and a femoral vein-inferior vena cava model 7 are reconstructed according to CT data of a patient. The specific reconstruction method comprises the following steps:

(1) atrial model and femoral to inferior vena cava model data processing

And (3) reconstructing an atrium model and a femoral vein-inferior vena cava model by 3D slicer software based on CT data of the atrium and the femoral vein-inferior vena cava of the patient, and then deriving stl data. And then restoring the real structure of the data by using Geomagic Studio software. And finally, introducing UG NX software to design an atrium model and a femoral vein to an inferior vena cava model.

(2)3D printing die

The mold is printed by an EOS P110 machine, the surface of the mold is subjected to sand blasting treatment to remove printed textures, and then electroplating polishing is carried out to ensure the smoothness of the surface.

(3) Forming of models

After a special tool is used for fixing the mould, injecting addition type silica gel by JN-B1256 liquid silica gel equipment. And (3) putting the mould into a heating device at 100 ℃, and demolding and molding after the silica gel is cured.

(4) Material of model

The atrium model and the model from the femoral vein to the inferior vena cava are made of silica gel materials with the hardness of 30A, the breaking elongation of 300%, the tensile strength MPa of 4.5 +/-0.5 and the tearing strength KN/m of 12 +/-2.

Above-mentioned material is the best silica gel material data that the inventor finally obtained through a lot of experiments, and the texture of this silica gel is close with real atrium, and the atrium model that from this silica gel was printed beats 3 apertures about 1cm in interatrial department, and the sheath pipe accessible just can not lead to the atrium model to sink in the operation training operation, consequently is convenient for the better exercise sheath pipe of training person and melts mutually supporting of major part, can also simulate the influence of different interatrial interval puncture positions to the operation in the art simultaneously. The utility model provides an atrium model and inferior vena cava to femoral vein model are very close with the real atrium of human body and inferior vena cava to femoral vein, enable the pipe operation of the true operation of acquisition that the student can the at utmost and feel.

In order to facilitate trainers to better practice the three-dimensional anatomical characteristics of different types of atria, the inventor manufactures various atrium models, and in order to facilitate the fixation and replacement of the atrium models, the inventor adopts the following structure: the bottom of the atrium model 6 is provided with a fixing support 61, the fixing support 61 is composed of a fixing column 62 and a base 63, one end of the fixing column 62 is fixedly connected with the bottom of the atrium model 6, but the fixing column 62 is not inserted into the atrium model 6 to prevent the training operation from being influenced. The other end of the fixed column 62 is fixedly connected with a base 63, a groove 51 matched with the base in shape is formed in the top surface of the moving platform 5, and a plurality of rotary blocking pieces 52 are arranged at the edge of the groove 51. After the base 63 is inserted into the groove 51, the rotary stopper 52 is rotated to cover a part of the upper surface of the base 63, so as to stop the base 63 from coming off, and in order to achieve a better fixing effect, the thickness of the base 63 may be the same as the depth of the groove 51 or slightly smaller than the depth of the groove 51.

Example 2

As shown in fig. 5 and 6, on the basis of embodiment 1, a wrapper 9 is further provided on the model 7 from the femoral vein to the inferior vena cava in embodiment 2. The wrapper 9 is mainly used for truly simulating the wrapping feeling of the skin and subcutaneous tissues at the femoral vein puncture part of the human body and the tortuous part of the femoral vein to the long sheath. The wrapper 9 may be placed on the open end of the left femoral vein model 72 or the open end of the right femoral vein model 73.

The wrapper 9 is composed of a silica gel ring 91, a double-end connecting pipe 92 and a stop cap 93, the double-end connecting pipe 92 is provided with a first connecting pipe 921 and a second connecting pipe 922, the two are communicated, and the diameter of the first connecting pipe 921 is smaller than that of the second connecting pipe 922. In embodiment 2, the first connection tube 921 is connected to the right femoral vein model 73 open port. The silica gel ring 91 is disposed in the second connecting pipe 922, the stop cap 93 is sleeved on the outside of the second connecting pipe 922 and is fixedly connected with the second connecting pipe 922, in embodiment 2, the stop cap 93 is provided with an internal thread, and an external thread is disposed outside the second connecting pipe 922 and is in threaded connection with the internal thread. The stop cap 93 is provided with a through hole, the diameter of the through hole is smaller than the outer diameter of the annular silica gel ring 91, the stop silica gel ring 91 is prevented from being separated during operation, and the through hole in the stop cap 93 can be used for a sheath tube for operation to pass through. The thickness of the silicone ring 91 can be designed according to the requirement of simulation training, and the tactile feedback of tissue wrapping the sheath tube at the femoral vein puncture position in the operation can be truly simulated by adjusting the thickness of the silicone ring wrapping the sheath tube, so that an operator can be familiar with and deal with the operation difficulty caused by the tortuosity of the blood vessel and the tissue wrapping at the puncture position. The other structure in embodiment 2 is the same as that in embodiment 1.

As shown in fig. 7 and fig. 8, fig. 7 shows the pressure curve recorded by the pressure sensor at the head end of the large head when the patient breathes normally, in the real operation, the ablation large head is stabilized at the top of the right pulmonary vein of the atrium of the patient by the reverse S-bend. Fig. 8 shows the pressure curve change recorded by the large-head end baroreceptor when the simulation training device for atrial fibrillation radio frequency surgery is used for simulating surgery, wherein the ablation large head is stabilized on the top of the right pulmonary vein of the transparent silica gel atrial model through the reverse S-shaped bend, and the respiration simulator is started. Therefore, the utility model has high similarity between the pressure curve change and the real operation pressure curve change, and can provide the real simulated operation feeling for the trainee.

Claims (11)

1. An atrial fibrillation radio frequency ablation operation simulation training device is characterized by comprising a controller, a driver, an execution motor, a motion conversion mechanism, a motion platform, an atrial model and a model from femoral vein to inferior vena cava; the arrangement positions of the atrium model and the model from the femoral vein to the inferior vena cava conform to the human anatomy structure, and the atrium model is fixed on the motion platform; the controller is connected with the driver, a pulse output port of the driver is connected with the execution motor, and the driver reads a control program of the controller and drives the execution motor to move; the actuating motor drives the motion platform to do reciprocating motion along the human body front median line direction in the human body anatomical structure through the motion conversion mechanism.

2. The atrial fibrillation radio frequency ablation procedure simulation training device of claim 1, wherein:

the controller is a PLC controller.

3. The atrial fibrillation radio frequency ablation procedure simulation training device of claim 1 or 2, wherein:

the driver is an actuating motor driver.

4. The atrial fibrillation radio frequency ablation procedure simulation training device of claim 3, wherein:

the motion conversion mechanism comprises a coupling, a screw rod, a nut seat, a screw rod sleeve and a fixed frame, and the execution motor and the screw rod sleeve are fixed on the fixed frame; the output shaft of the execution motor is connected with the top end of the screw rod through a coupler, the bottom end of the screw rod is sleeved with the screw rod sleeve, the nut seat is sleeved on the screw rod, and the motion platform is fixed on the upper surface of the nut seat.

5. The atrial fibrillation radio frequency ablation procedure simulation training device of claim 4, wherein:

the actuating motor is a servo motor or a stepping motor.

6. The atrial fibrillation radio frequency ablation operation simulation training device as claimed in claim 1, further comprising an adjustable height adjusting support, wherein a fixed platform is arranged on the top surface of the adjustable support, a fixedly connected clamping ring is arranged on the fixed platform, and the model from the femoral vein to the inferior vena cava is clamped in the clamping ring and fixedly connected with the fixed platform.

7. The atrial fibrillation radio frequency ablation procedure simulation training device of claim 1, wherein:

the femoral vein model is characterized in that a wrapping device is arranged on the femoral vein model to the inferior vena cava model, the wrapping device is composed of an annular silica gel ring, a double-end connecting pipe and a stop cap, the double-end connecting pipe is composed of a first connecting pipe and a second connecting pipe, the diameter of the first connecting pipe is smaller than that of the second connecting pipe, the first connecting pipe is connected with the open end of the femoral vein model to the inferior vena cava model, the annular silica gel ring is arranged in the second connecting pipe, the stop cap is sleeved on the second connecting pipe and is fixedly connected with the second connecting pipe, a through hole is formed in the stop cap, and the diameter of the through hole is smaller than the outer diameter of the annular silica gel ring and the through hole can be used.

8. The atrial fibrillation radio frequency ablation procedure simulation training device of claim 1, wherein:

the atrial model and/or the femoral vein to inferior vena cava model are reconstructed from patient CT data.

9. The atrial fibrillation radio frequency ablation procedure simulation training device of claim 8, wherein:

the atrium model and/or the model from the femoral vein to the inferior vena cava are/is made of a silica gel material with the hardness of 30A, the breaking elongation of 300%, the tensile strength MPa of 4.5 +/-0.5 and the tearing strength KN/m of 12 +/-2.

10. The atrial fibrillation radio frequency ablation procedure simulation training device of claim 9, wherein:

the bottom of the atrium model is provided with a fixed support, and the fixed support consists of a fixed column and a base; one end of the fixing column is fixedly connected with the bottom of the atrium model, and the other end of the fixing column is fixedly connected with the base; the top surface of the moving platform is provided with a groove matched with the base in shape, and the edge of the groove is provided with a plurality of rotating blocking pieces.

11. The atrial fibrillation radio frequency ablation procedure simulation training device of claim 1, wherein:

the model from the femoral vein to the inferior vena cava consists of an inferior vena cava model, a left femoral vein model and a right femoral vein model, and the open end of the inferior vena cava model is connected with a hard tube.

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