CN114225189B - An intraocular imaging balloon catheter - Google Patents

Abstract

The invention discloses an internal imaging balloon catheter, which comprises: a guidewire tube, an imaging tube, a balloon and an internal imaging probe; the guide wire tube is connected with the imaging tube and is not communicated with the imaging tube, and the balloon is partially sleeved on the outer peripheral surface of the guide wire tube; the imaging tube is communicated with the interior of the balloon, the balloon can be expanded by inputting liquid into the imaging tube, and the expanded balloon can be a use position of the internal imaging balloon catheter for expanding stenosis. The inner imaging probe is disposed inside the imaging tube. The guide wire tube is provided with a guide wire cavity for penetrating the guide wire, and the guide wire can penetrate to the outer side of the guide wire tube. The guide wire tube and the imaging tube extend in the same direction, so that the diameter of the guide wire tube can be set to be small, the use positions of the guide wire tube can be directly reached to some stenosis, and meanwhile, the loss on ultrasound is small because the inner imaging probe only needs to penetrate through the single-layer tube wall of the imaging tube for scanning detection observation; in addition, the expansion of the balloon does not influence the detection position of the internal imaging probe, so that the accuracy of internal imaging is improved.

Description

An intraocular imaging balloon catheter

Technical Field

The invention relates to the technical field of balloon catheters, and mainly to an internal imaging balloon catheter.

Background Art

An example of an intra-imaging technique combined with a balloon catheter in the prior art is an acoustic imaging balloon catheter, which is formed by a disposable liquid-constrained sheath supporting a high-fidelity flexible drive shaft that carries an ultrasound transducer on its end and includes an inflatable dilatation balloon.

The shortcomings of the existing technology are: first, the double-cavity structure inside the balloon increases the outer diameter of the catheter, which is not conducive to entering smaller and narrower parts; second, when the probe is imaging inside the balloon, the ultrasound must pass through the double-layer barrier of the inner tube and the balloon, which requires high penetration and accuracy of the ultrasound; third, the expansion effect of the balloon after filling may affect the judgment of the position.

Therefore, how to provide an internal imaging balloon catheter with small size and precise internal imaging scanning is a problem that needs to be solved by those skilled in the art.

Summary of the invention

The object of the present invention is to provide an internal imaging balloon catheter with more accurate internal imaging scanning detection and smaller size.

To achieve the above-mentioned object, the present invention provides an internal imaging balloon catheter, comprising: a guidewire tube, provided with a guidewire cavity, the guidewire cavity being used to pass a guidewire;

An imaging tube is arranged at one end of the wire guide tube and extends in the same direction as the wire guide tube;

The balloon is partially sheathed on the outer periphery of the guide wire tube and is connected to the imaging tube to expand the balloon;

The internal imaging probe is arranged at one end of the imaging tube away from the balloon.

Optionally, the internal imaging probe includes: a transducer and a driving shaft, and the transducer can rotate and move along the length direction of the imaging tube following the driving shaft.

Optionally, a handle for controlling the internal imaging probe is connected to the imaging tube.

Optionally, the handle includes: a joint for connecting the drive shaft and an injection hole for injecting liquid.

Optionally, a sealing ring is provided between the joint and the injection hole to prevent liquid from leaking out.

Optionally, the internal imaging probe may also be an OCT probe to achieve internal imaging scanning.

Compared with the above background technology, the present invention is provided with: a guide wire tube, an imaging tube, a balloon and an internal imaging probe; the guide wire tube is connected to the imaging tube and is not connected. The balloon is partially sheathed on the outer peripheral surface of the guide wire tube, and the guide wire tube retains a part that is not sheathed; the imaging tube is connected to the inside of the balloon by setting a small cavity on the outer surface of the part of the guide wire tube that is not sheathed, and the operator can expand the balloon by inputting liquid into the imaging tube, and the expanded balloon can open the narrow working position for the internal imaging balloon catheter to facilitate the movement and subsequent operation of the internal imaging balloon catheter. The internal imaging probe is arranged at one end of the imaging tube away from the balloon, and such arrangement ensures that the scanning detection of the internal imaging probe only needs to penetrate the inner wall of the imaging tube. The guide wire tube is provided with a guide wire cavity for inserting a guide wire, one end of which is opened on the end surface of the guide wire tube away from the imaging tube, and the other end is opened on the side wall of the guide wire tube, and the middle section of the guide wire cavity passes through the inside of the balloon and is not connected with it, so as to realize the side puncture of the guide wire. The guide wire tube and the imaging tube extend in the same direction, so the diameter of the catheter can be set very small, which can meet the needs of reaching some narrow working positions. At the same time, because the internal imaging probe is arranged on the outside of the balloon, it only needs to pass through the single-layer tube wall of the imaging tube for scanning, detection and observation, which causes less loss of ultrasound; and the expansion of the balloon will not affect the detection position of the internal imaging probe. The combination of the two improves the accuracy of internal imaging.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

FIG1 is a cross-sectional view of an internal imaging balloon catheter provided by an embodiment of the present invention;

FIG2 is a schematic diagram of the structure of an internal imaging probe provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of the external installation of the internal imaging balloon catheter and the handle provided in an embodiment of the present invention.

in:

1-guidewire tube, 2-imaging tube, 3-balloon, 4-internal imaging probe, 41-transducer, 42-driving shaft, 5-handle, 51-connector, 52-injection hole.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

Referring to Figure 1 of the specification, Figure 1 is a cross-sectional view of the internal imaging balloon catheter provided by an embodiment of the present invention, including: a guide wire tube 1, an imaging tube 2, a balloon 3 and an internal imaging probe 4; the guide wire tube 1 is connected to the imaging tube 2 but not connected, and the passage between the two can be separated by and is not limited to being separated by a rubber material. The balloon 3 is partially sleeved on the outer peripheral surface of the guide wire tube 1, and the guide wire tube 1 retains a portion that is not sleeved; the imaging tube 2 is connected to the inside of the balloon 3 by setting a small cavity on the outer surface of the portion that is not sleeved by the guide wire tube 1. The operator can expand the balloon 3 by injecting liquid into the imaging tube 2. The expanded balloon 3 can expand the narrow working position of the internal imaging balloon catheter so that the internal imaging balloon catheter can be moved and subsequently operated. The internal imaging probe 4 is arranged inside the imaging tube 2 and at the end away from the balloon 3. Such an arrangement ensures that the scanning detection of the internal imaging probe 4 only needs to penetrate the inner wall of the imaging tube 2. The guidewire tube 1 is provided with a guidewire cavity for inserting a guidewire, one end of the guidewire cavity is provided on the end face of the guidewire tube 1 away from the imaging tube 2, and the other end is provided on the side wall of the guidewire tube 1, and the middle section of the guidewire cavity passes through the interior of the balloon 3 and is not connected thereto, so as to realize the side puncture of the guidewire. The guidewire tube 1 and the imaging tube 2 extend in the same direction, so the diameter of the catheter can be set very small (≤3.3F), which can meet the requirements of reaching some narrow working positions directly, and because the internal imaging probe 4 is arranged outside the balloon 3, it only needs to pass through the single-layer wall of the imaging tube 2 for scanning, detection and observation, which has less energy loss for scanning; and the expansion of the balloon 3 will not affect the detection position of the internal imaging probe 4, and the combination of the two improves the accuracy of internal imaging.

When the internal imaging balloon catheter of the present application is used in a PCI (percutaneous coronary intervention) operation: the guidewire enters from the guidewire cavity arranged on the end face of the guidewire tube 1, and passes through the side wall of the guidewire tube 1, and the internal imaging balloon catheter enters the target blood vessel along the guidewire, and physiological saline enters the balloon 3 from the imaging tube 2 to fill and expand it, and the internal imaging probe 4 arranged on one side of the balloon 3 can be connected to an external control system to scan and detect the inside of the blood vessel while the balloon 3 is filled and expanded, and the internal imaging balloon catheter can also be extended forward after the balloon 3 is contracted, so that the internal imaging probe 4 can detect inside the blood vessel after the balloon 3 is expanded.

In general, when the above-mentioned balloon 3 is implemented in a PCI operation, the length is set shorter to reduce the imaging blind area, and the length of the straight section thereof is generally required to be ≤5 mm.

Further, referring to Figure 2 of the specification, Figure 2 is a schematic diagram of the structure of the internal imaging probe provided in an embodiment of the present invention, including: the above-mentioned internal imaging probe 4 includes: a transducer 41 and a driving shaft 42; the above-mentioned transducer 41 is installed at one end of the driving shaft 42 facing the guide wire tube 1, and can rotate and move along the length direction of the imaging tube 2 following the driving shaft 42; the detection range of the transducer 41 can be changed according to the moving range of the driving shaft 42.

Furthermore, a handle 5 is provided at one end of the imaging tube 2 away from the guide wire tube 1, and the handle 5 is used to connect the external control system with the internal imaging probe 4, control the internal imaging probe 4 to realize ultrasonic imaging and feed back the imaging data to the external system for observation by the operator.

Further, referring to Figure 3 of the specification, Figure 3 is a schematic diagram of the external installation of the internal imaging balloon catheter and the handle provided by the embodiment of the present invention, including: the handle 5 includes: a joint 51 and an injection hole 52, the joint 51 is used to connect the drive shaft 42 and transmit the control signal of rotation and movement to it; the injection hole 52 is connected to the imaging tube 2, and the operator can inject liquid into the imaging tube 2 and the balloon 3 to ensure that the internal imaging probe 4 inside the imaging tube 2 is covered by the liquid transmission medium while expanding the balloon 3, so as to assist it in completing ultrasonic imaging. For example, in PCI surgery, the liquid can use physiological saline as the medium for ultrasonic imaging to eliminate the risk of damaging the human body.

Furthermore, a sealing ring is provided between the joint 51 and the injection hole 52 , and both the joint 51 and the injection hole 52 are connected to the imaging tube 2 , so the sealing ring is provided to prevent the injected liquid from leaking out of the joint 51 and affecting external equipment.

Furthermore, the above-mentioned internal imaging probe may also be an OCT (optical coherence tomography) probe. The internal imaging detection realized by the OCT probe does not need to rely on liquid as a conductive medium, which simplifies the complexity of the equipment.

It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

The above is a detailed introduction to the intra-imaging balloon catheter provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims (7)

1. An internal imaging balloon catheter, comprising: A guide wire tube (1) is provided with a guide wire cavity, wherein the guide wire cavity is used for passing a guide wire; An imaging tube (2) is arranged at one end of the guide wire tube (1), the guide wire tube (1) is connected to the imaging tube (2) but not in communication with the imaging tube (2), and extends in the same direction as the guide wire tube (1); A balloon (3) is partially sleeved on the outer circumference of the guide wire tube (1), and the balloon (3) is used to be expanded by injection of a transmission medium; One end of the guidewire cavity is opened on the end surface of the guidewire tube (1) facing away from the imaging tube (2), and the other end is opened on the side wall of the guidewire tube (1). The middle section of the guidewire cavity passes through the interior of the balloon (3) and is not connected thereto. The guide wire tube (1) is provided with an unsheathed portion, the radial dimension of the unsheathed portion of the guide wire tube (1) is smaller than the outer diameter of the imaging tube (2), the imaging tube (2) is connected to the interior of the balloon (3) by providing a small cavity on the outer surface of the unsheathed portion of the guide wire tube (1), and the proximal end of the unsheathed portion of the guide wire tube (1) is arranged side by side with the small cavity to form a joint section whose overall outer diameter is consistent with the outer diameter of the imaging tube (2); An internal imaging probe (4) includes a transducer (41) or an OCT probe to realize internal imaging scanning. The internal imaging probe (4) is arranged at one end of the imaging tube (2) away from the balloon (3), and the internal imaging probe (4) is arranged outside the balloon (3) so as to pass through the single-layer tube wall of the imaging tube (2) during scanning, thereby reducing energy loss. The internal imaging probe (4) is covered by the transmission medium while the balloon (3) is expanded. 2. The internal imaging balloon catheter according to claim 1 is characterized in that the internal imaging probe (4) comprises: the transducer (41) and a drive shaft (42), and the transducer (41) can rotate and move along the length direction of the imaging tube (2) following the drive shaft (42). 3. The internal imaging balloon catheter according to claim 2, characterized in that the imaging tube (2) is connected to a handle (5) for controlling the internal imaging probe (4). 4. The internal imaging balloon catheter according to claim 3, characterized in that the handle (5) comprises: a connector (51) for connecting the drive shaft (42) and an injection hole (52) for injecting liquid. 5. The internal imaging balloon catheter according to claim 4, characterized in that a sealing ring is provided between the joint (51) and the injection hole (52) to prevent the liquid from leaking out. 6. The internal imaging balloon catheter according to claim 1, characterized in that the length of the straight section of the balloon (3) is less than or equal to 5 mm. 7 . The internal imaging balloon catheter according to claim 1 , wherein the diameter of the internal imaging balloon catheter is less than or equal to 3.3F.