WO2018161383A1 - Oct catheter withdrawal apparatus capable of achieving precise positioning - Google Patents

Abstract

Disclosed is an OCT catheter withdrawal apparatus capable of achieving precise positioning. The apparatus comprises a bronchofiberscope body (1), a clamping device, a lead screw step motor (6) and a controller, wherein the lead screw step motor (6) is electrically connected to the controller; the lead screw step motor (6) is disposed on the bronchofiberscope body (1), and a lead screw nut of the lead screw step motor (6) is in transmission connection with the clamping device; and an OCT catheter (5) successively runs through the clamping device and the bronchofiberscope body (1). The OCT catheter withdrawal apparatus is based on the OCT principle and combines precise positioning technology and OCT catheter withdrawal technology so as to realize a precise medical diagnosis for a lumen of a human body.

Description

Accurately positioned OCT catheter withdrawal device Technical field

The invention belongs to the technical field of medical instruments, and in particular relates to a precisely positioned OCT catheter withdrawing device.

Background technique

Optical coherence tomography (OCT) is a high-resolution imaging technique based on the principle of low-coherence light interference, which can detect the backscattered wave echo time of incident near-infrared light in different depth layers of biological tissues. The delayed and echo intensity signals are scanned to obtain a high-resolution microstructure of the sample in two or three dimensions, thereby obtaining a tomographic image of the sample to be tested in vivo.

At present, research on optical interference tomography at home and abroad mainly focuses on OCT technology and equipment in ophthalmology, human dermatology and cardiovascular fields. On the one hand, the current domestic units conducting OCT research include Tsinghua University, Zhejiang University, Tianjin University, etc., but most of the research groups focus on the demonstration and research of OCT principles, and there is no corresponding development that can be used in human body lumens. OCT equipment; on the other hand, the general OCT system can only be used for imaging in a single location organization, but the information displayed by a single section is often limited, which is not conducive to medical personnel to accurately determine the type and size of the lesion, so it must be added The module that drives the scanning probe to move in the axial direction realizes imaging of a certain depth range of human tissue within a certain range, and can clearly determine the shape of the tissue structure, the position and size of the lesion, and the like by imaging, and obtain the tube at the same time. Three-dimensional solution of cavity tissue Sectional structure.

Summary of the invention

In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a precisely positioned OCT catheter withdrawing device which can solve the technical problem of accurate withdrawal of the OCT catheter.

The object of the invention is achieved by the following technical solutions:

A precisely positioned OCT catheter withdrawing device comprises a fiber optic mirror body, a clamping device, a screw stepping motor and a controller; the screw stepping motor is electrically connected to the controller;

The lead screw stepping motor is disposed on the fiber optic mirror body, and the lead screw nut of the screw stepping motor is drivingly connected to the clamping device; an OCT catheter is sequentially connected to the clamping device and the fiber optic mirror body.

Preferably, the method further includes an initial photogate and a protection photogate disposed outside the lead screw stepping motor, wherein the initial photogate and the protection photogate are electrically connected to the controller. It can further solve the technical problem of accurate withdrawal of OCT catheter.

Preferably, the clamping device comprises an elastic protection tube and a pipe clamp, and an OCT pipe is threaded into the elastic protection tube of the clamping device, the pipe clamp is disposed on the screw stepping motor, and the pipe clamp is used for clamping Flexible protection tube. It can further solve the specific structure of the clamping device.

Preferably, the inner surface of the elastic protection tube is provided with a rubber layer. It further discloses the internal structure of the elastic protection tube.

Preferably, the rubber layer has a sliding friction coefficient greater than 0.5. It is further disclosed The technical characteristics of the rubber layer in the elastic protection tube.

Preferably, the inner surface of the pipe clamp is provided with a concave groove shape corresponding to the elastic protection tube. It further solves the specific shape setting of the pipe clamp.

Preferably, the clamping device further comprises a fine adjustment device for adjusting the tightness of the pipe clamp clamping the elastic protection tube. It further discloses an adjustment structure of the gripping device.

Preferably, the fiber bronchoscope body is provided with a working channel, and an OCT catheter sequentially passes through the elastic protection tube and the working channel, and protrudes from the end of the fiber bronchoscope body.

Preferably, a motor sleeve is further included, and the motor sleeve is sleeved on the screw stepping motor.

Preferably, the fiber optic mirror body is provided with a knob device for controlling the deflection direction of the OCT catheter.

Compared with the prior art, the beneficial effects of the present invention are:

The invention is based on the principle of OCT, and combines precise positioning technology and OCT catheter extraction technology to realize accurate medical diagnosis of human body lumen.

DRAWINGS

1 is a structural view of a precisely positioned OCT catheter withdrawing device of the present invention;

Figure 2 is an enlarged view of the structure at A in Figure 1.

Reference numerals: 1, fiber bronchoscope body; 2, pipe clamp; 3, elastic protection tube; 4, fine adjustment device; 5, OCT catheter; 6, screw stepper motor; 7, protection photoelectric door; Photoelectric door.

detailed description

The present invention will be further described below in conjunction with the drawings and specific embodiments.

As shown in FIG. 1 and FIG. 2, the present invention provides a precisely positioned OCT catheter withdrawing device, comprising a fiber optic mirror body 1, a clamping device, a screw stepping motor 6, an initial photogate 7, and a photoelectric protection device. a door 8, a controller and a motor sleeve; the starting photogate 8, the protection photogate 7 and the screw stepper motor 6 are electrically connected to the controller; the clamping device comprises an elastic protection tube 3, a pipe clamp 2 and the fine adjustment device 4, the fiber bronchoscope body 1 is provided with a working channel;

The screw stepping motor 6 and the clamping device are all disposed on the fiber optic mirror body 1, that is, the side of the fiber optic mirror body 1 protrudes with a bypass joint, and the screw stepping motor 6 and the clamping device are disposed on the fiber a bypass joint of the mirror body 1 and a screw nut of the screw stepping motor 6 is drivingly connected to the clamping device; an OCT conduit 5 sequentially passes through the elastic protection tube 3 and the working channel, and the fiber bronchoscope The end of the body 1 is extended;

The pipe clamp 2 is used for clamping the elastic protection tube 3, thereby realizing the electronically controlled constant withdrawal of the OCT conduit 5 by the screw stepping motor 6. The inner surface of the elastic protection tube 3 is provided with a rubber layer, and the rubber layer is provided. The sliding friction coefficient is greater than 0.5; the OCT conduit 5 can be relatively stably disposed in the elastic protection tube 3 by setting a relatively large sliding friction coefficient, and the fine adjustment device 4 is used for adjusting the tightness of the elastic protection tube 3 of the pipe clamp 2 The inner surface of the pipe clamp 2 is provided with a concave groove shape corresponding to the elastic protection pipe 3. When the pipe clamp 2 is in the clamped state, the pipe clamp 2 encloses the elastic protection pipe 3 to closely fit the surface of the OCT pipe 5, and the OCT The surface of the conduit 5 has a large contact area, which can effectively reduce the pressure of the clamping device on the OCT conduit 5, and has the function of protecting the OCT conduit 5;

The motor sleeve is sleeved on the screw stepping motor 6 , and the fiber bronchoscope body 1 is disposed There is a knob device for controlling the deflection direction of the OCT catheter 5; the medical staff controls the advancement direction of the OCT catheter entering the body lumen by rotating the knob device;

The outer ends of the screw stepping motor 6 are respectively provided with a photoelectric gate, an initial photoelectric gate 8, and a protection photoelectric gate 7. The two photoelectric gates are disposed at the starting position of the withdrawal and the maximum retractable position. The starting photogate 8 generates a trigger pulse for starting the pumping back of the OCT conduit 5, and the protection photogate 7 is used to avoid the problem of excessive back pumping of the OCT catheter 5. When the screw stepping motor 6 has lost motion, it can pass The protection photogate 7 provides a termination signal to the controller, which controls the motor to stop pumping back.

The working principle of the invention:

When the device is used, the clamping device is placed in the withdrawal starting position by default. After the OCT catheter 5 is clamped, the medical staff sets the withdrawal distance, and the clamping device carries the OCT catheter 5 through the starting photogate 8. At this time, the total number of pulses of the driving screw stepping motor 6 is calculated, and the OCT catheter 5 is pumped at a constant speed. The controller uses the pulse number to calculate the pumping distance. When the pumping distance reaches a preset value, the screw stepping motor 6 stops working, the OCT catheter 5 is pumped back; if the motor loses step, it has not stopped after reaching the preset distance. At this time, the protection photogate 7 detects the clamping device, thereby transmitting a stop signal to the controller. The controller control screw stepping motor 6 is stopped.

Various other changes and modifications may be made by those skilled in the art in light of the above-described technical solutions and concepts, and all such changes and modifications are intended to fall within the scope of the appended claims.

Claims (10)

A precisely positioned OCT catheter withdrawing device, comprising: a fiber bronchoscope body, a clamping device, a screw stepping motor and a controller; the screw stepping motor is electrically connected to the controller; The lead screw stepping motor is disposed on the fiber optic mirror body, and the lead screw nut of the screw stepping motor is drivingly connected to the clamping device; an OCT catheter is sequentially connected to the clamping device and the fiber optic mirror body. The precisely positioned OCT conduit pumping device of claim 1 further comprising an initial photogate and a protective photogate disposed outside the lead screw stepper motor, said initial photogate and said protective photogate Both are electrically connected to the controller. The precision positioning OCT catheter withdrawing device according to claim 1, wherein the clamping device comprises an elastic protection tube and a pipe clamp, and an OCT conduit is threaded into the elastic protection tube of the clamping device, the pipe clamp It is disposed on the screw stepping motor, and the pipe clamp is used for clamping the elastic protection tube. The precisely positioned OCT catheter withdrawing device according to claim 3, wherein the inner surface of the elastic protective tube is provided with a rubber layer. The precisely positioned OCT catheter withdrawal device of claim 4 wherein said rubber layer has a coefficient of sliding friction greater than 0.5. The precisely positioned OCT catheter withdrawing device according to claim 3, wherein the inner surface of the pipe clamp is provided with a concave groove shape corresponding to the elastic protection tube. The precisely positioned OCT catheter withdrawal device of claim 3, wherein the clamping device further comprises a fine adjustment device for adjusting the tightness of the pipe clamp holding the elastic protection tube. The precision positioning OCT catheter withdrawing device according to claim 3, wherein the fiber bronchoscope body is provided with a working channel, and an OCT catheter sequentially passes through the elastic protection tube and the working channel, and the fiber bronchoscope The end of the body extends. The precisely positioned OCT catheter extraction device of claim 1 further comprising a motor sleeve that is sleeved at the lead screw stepper motor. The precisely positioned OCT catheter withdrawing device according to claim 1, wherein the fiber optic mirror body is provided with a knob device for controlling a deflection direction of the OCT catheter.

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