CN109528236B

CN109528236B - Injection device of intravascular ultrasound catheter

Info

Publication number: CN109528236B
Application number: CN201811650249.1A
Authority: CN
Inventors: 蔡杰; 刘艳菊; 郑欲晓
Original assignee: Insight Lifetech Co Ltd
Current assignee: Insight Lifetech Co Ltd
Priority date: 2018-12-31
Filing date: 2018-12-31
Publication date: 2020-07-21
Anticipated expiration: 2038-12-31
Also published as: CN109528236A; CN111588411B; CN111588411A

Abstract

The present disclosure provides an injection device for an intravascular ultrasound catheter, which is an injection device for an ultrasound catheter having a sheath and a transmission shaft movable in the sheath, and is characterized by comprising: one end of the tube body is connected with the sheath tube, the other end of the tube body is open, the transmission shaft penetrates through the tube body along the length direction of the tube body, a sealing ring with the inner diameter matched with the outer diameter of the transmission shaft is arranged in the tube body, and the transmission shaft can move relative to the sealing ring; and a moving part having a sleeve for accommodating the transmission shaft, the sleeve being movable relative to the tube body, the sleeve being further provided with a scale, wherein an injection port is provided in the tube body between the seal ring and the sheath tube. According to the present disclosure, the risk of injection during an interventional procedure can be reduced.

Description

Injection device of intravascular ultrasound catheter

Technical Field

The present disclosure relates to the field of intravascular ultrasound catheters, and more particularly, to an injection device for an intravascular ultrasound catheter.

Background

IVUS systems are collectively referred to as intravascular ultrasound imaging systems. Through a radial or femoral puncture, the IVUS catheter is advanced to the vascular lesion. During the retraction process of the tube core of the IVUS catheter, the ultrasonic imaging is carried out on the structural information of the lumen and the wall section of the blood vessel through the miniature ultrasonic transducer at the front end of the tube core. Before the IVUS catheter enters the human body, physiological saline needs to be injected into the catheter from the water injection hole by using an injector to discharge air bubbles in the IVUS catheter, so that the miniature ultrasonic transducer is completely positioned in the environment coated by liquid, and the measurement accuracy is improved. The injection device of the IVUS catheter mainly comprises a water injection part and a movable part, and a graduated scale is printed on the wall of the movable part.

However, the existing IVUS injection device has high requirements for ink used as a scale, because the injected saline needs to pass through a catheter printed with a scale, and the saline is directly communicated to the internal environment of the human body. In addition, in the existing design, the movable part generates partial pressure when moving, and the risk generated in the operation process is increased.

Disclosure of Invention

The present disclosure has been made in view of the above-described state of the art, and an object thereof is to provide an intravascular ultrasound catheter injection device capable of reducing the risk of injection during surgery.

To this end, the present disclosure provides an injection device for an intravascular ultrasound catheter, which is an injection device for an ultrasound catheter having a sheath and a transmission shaft movable in the sheath, the injection device comprising: a tube body having one end connected to the sheath tube and the other end opened, and the transmission shaft penetrating the tube body along a length direction of the tube body, in which a sealing ring having an inner diameter matching an outer diameter of the transmission shaft is provided, and the transmission shaft is movable relative to the sealing ring; and a moving part having a sleeve accommodating the transmission shaft, the sleeve being movable relative to the tube body, the sleeve being further provided with a scale, wherein an injection port is provided in the tube body between the seal ring and the sheath tube.

In this disclosure, medical personnel and the like can inject physiological saline into the intravascular ultrasound catheter through the injection port of the injection device so as to discharge air in the catheter, and the sealing ring can block the physiological saline from entering the moving part, so that the moving part can not participate in the injection process of the physiological saline, thereby avoiding contact with the internal environment, and thus, reducing the injection risk in the interventional operation process.

In addition, in the injection device according to the present disclosure, optionally, an inner diameter of the tube body is larger than an outer diameter of the sleeve. Thus, the tube can accommodate the sleeve to move inside the tube.

In the injection device according to the present disclosure, the tube body may be connected to the sheath tube so that an inner diameter thereof is gradually reduced to an outer diameter of the sheath tube. Therefore, the possibility of breakage of the connection part of the tube body and the sheath tube can be reduced.

In the injection device according to the present disclosure, the tube body may be formed by integral molding. This can improve the stability of the pipe body.

In the injection device according to the present disclosure, the tube body may have a stopper portion for restricting a position of the moving portion. This can limit the moving distance of the moving unit.

In the injection device according to the present disclosure, the stopper may be formed of the seal ring. Thereby, the seal ring can restrict the movement of the moving portion.

In addition, in the injection device according to the present disclosure, the transmission shaft may have a rigid tube that can penetrate the tube body in a longitudinal direction of the tube body. This can improve the reliability of the propeller shaft.

In addition, in the injection device according to the present disclosure, optionally, in the moving portion, an inner diameter of the sleeve is larger than an outer diameter of the drive shaft. Thereby, the drive shaft can be allowed to move in the sleeve.

Further, in the injection device according to the present disclosure, optionally, at least a portion of the sleeve is disposed between the drive shaft and the tube body. In this case, the scale on the sleeve can be observed and recorded by shielding the tube body, thereby obtaining the moving distance of the sleeve.

Further, in the injection device according to the present disclosure, optionally, the rigid tube and the drive shaft are connected via welding. Thereby, the rigid tube and the propeller shaft can be tightly connected.

According to the present disclosure, an injection device of an intravascular ultrasound catheter capable of reducing the risk of injection during an interventional procedure can be provided.

Drawings

Fig. 1 is a perspective view illustrating an injection device of an intravascular ultrasound catheter according to an embodiment of the present disclosure.

Fig. 2 is a side view illustrating an injection device of an intravascular ultrasound catheter according to an embodiment of the present disclosure.

Fig. 3 is a top view illustrating an injection device of an intravascular ultrasound catheter according to an embodiment of the present disclosure.

Fig. 4 is a sectional view showing an injection device of an intravascular ultrasound catheter according to an embodiment of the present disclosure.

Fig. 5 is a sectional view showing a retracted state of the injection device of the intravascular ultrasound catheter according to the embodiment of the present disclosure.

Description of reference numerals:

1 … injection device, 11 … sealing ring, 12 … injection inlet, 20 … moving part, 21 … sleeve, 30 … sheath, 40 … transmission shaft.

Detailed Description

The present disclosure will be described in further detail below with reference to the accompanying drawings and specific embodiments. In the drawings, the same components or components having the same functions are denoted by the same reference numerals, and redundant description thereof will be omitted.

Fig. 1 is a perspective view illustrating an injection device of an intravascular ultrasound catheter according to an embodiment of the present disclosure. Fig. 2 is a side view illustrating an injection device of an intravascular ultrasound catheter according to an embodiment of the present disclosure.

The embodiment of the present disclosure relates to an injection device 1 of an intravascular ultrasound catheter, and specifically, to an injection device 1 of an ultrasound catheter having a sheath 30 and a drive shaft 40 movable within the sheath 30. The injection device 1 comprises: a tube body 10 having one end connected to the sheath tube 30 and the other end opened, and a transmission shaft 40 penetrating the tube body along a length direction of the tube body, in which a sealing ring 11 having an inner diameter matching an outer diameter of the transmission shaft 40 is provided, and the transmission shaft 40 is movable relative to the sealing ring 11; and a moving part 20 having a sleeve 21 for accommodating the transmission shaft 40, the sleeve 21 being movable relative to the tube body, and scales being provided on the sleeve 21, wherein an injection port 12 is provided in the tube body between the seal ring 11 and the sheath tube 30.

In this case, the medical staff may inject the saline into the intravascular ultrasound catheter through the injection port 12 of the injection device 1 to discharge the air in the catheter, and the sealing ring 11 may block the saline from entering the moving portion 20, so the moving portion 20 may not participate in the injection process of the saline, thereby avoiding the contact with the internal environment, and thus, the injection risk during the interventional operation may be reduced.

In this embodiment, the intravascular ultrasound catheter may be used for ultrasound imaging of, for example, a diseased region (e.g., a stenosis) within a human vessel. A doctor or the like can obtain an intravascular ultrasound image of a diseased region (e.g., a stenosis) of a blood vessel of a human body by delivering such an intravascular ultrasound catheter to the region and ultrasonically imaging the diseased region while retracting.

In some examples, the sheath 30 may also have a distal portion distal from the tube 10 and a proximal portion proximal to the tube 10. In other examples, the distal end portion of the sheath 30 may be made of a material having a low acoustic impedance. Thereby, the penetration of the ultrasonic wave emitted by the ultrasonic transducer can be facilitated. In other examples, the proximal portion of the sheath 30 may be made of a stiffer material. Therefore, the stability of the proximal part can be improved, and the operation is convenient. In other examples, the stiffness of the sheath 30 may increase gradually from the distal portion to the proximal portion. In this case, the rigidity of the sheath 30 can be uniformly increased, reducing the possibility of occurrence of breakage.

In some examples, the sheath 30 may be made of at least one of a rubber-plastic material, a resin, or a composite thereof. Specifically, in some examples, the sheath 30 may be made of at least one material selected from ethylene-vinyl acetate copolymer (EVA), polyetheretherketone, polyethylene, linear low density polyethylene.

In some examples, the drive shaft 40 may include a spring. This enables the propeller shaft 40 to be rotated, bent, or the like. In some examples, the transmission shaft 40 may have a rigid tube 41 that may penetrate the tube body 10 in a length direction of the tube body 10 (see fig. 5). This can improve the reliability of the propeller shaft 40.

In some examples, the rigid tube 41 may have a snap-fit mechanism that cooperates with the spring to enable the spring to mechanically couple with the rigid tube. In other examples, the rigid tube 41 and the drive shaft 40 may be connected via welding. Thereby, the rigid tube 41 and the propeller shaft 40 can be tightly connected.

In addition, in some examples, the connection point of the rigid tube 41 and the transmission shaft 40 may be disposed between the seal ring 11 and the sheath 30. This can improve the rigidity of the moving portion 20.

In other examples, the rigid tube 41 may be a steel tube. However, the present embodiment is not limited to this, and the rigid tube 41 may be a tube made of iron, aluminum, or an alloy material. This can improve the stability of the propeller shaft 40.

Fig. 3 is a top view illustrating an injection device of an intravascular ultrasound catheter according to an embodiment of the present disclosure. Fig. 4 is a sectional view showing an injection device of an intravascular ultrasound catheter according to an embodiment of the present disclosure. Fig. 5 is a sectional view showing a retracted state of the injection device of the intravascular ultrasound catheter according to the embodiment of the present disclosure.

As shown in fig. 3, in some examples, an injection port 12 may be provided at an outer circumference of the tube 10, wherein the injection port 12 communicates with an inside of the tube 10. Thereby, the liquid can be injected through the injection port 12. In some examples, the injection port 12 may be provided in the tube between the sealing ring 11 and the sheath 30. In some examples, the injection port 12 may be funnel-shaped and protrude toward the outside of the tube body 10. Thereby, the medical injector can be matched. In other examples, the injection port 12 may be cylindrical, prismatic, or other irregular shape. Additionally, in some examples, the injection port 12 may be an opening in the tube 10. This enables a simple injection device 1 to be manufactured.

In some examples, the injection port 12 may be injected with saline. In this case, the intravascular ultrasound catheter can discharge air in the tube by injecting physiological saline, thereby preventing the occurrence of blood backflow and the like. In other examples, a 5% glucose solution may be injected into the injection port 12. In addition, amino acids, vitamin solutions, and the like may be injected into the injection port 12.

In some examples, the pipe body 10 may be made of at least one of a rubber plastic material, a resin, or a composite thereof. Specifically, in some examples, the tube body 10 may be made of at least one material selected from Ethylene Vinyl Acetate (EVA), polyetheretherketone, polyethylene, and linear low density polyethylene. Additionally, in some examples, the tubular body 10 may be made of glass.

In some examples, the tubular body 10 may be cylindrical. In other examples, the tubular body 10 may be cylindrical, prismatic, or other irregular shape.

In some examples, the inner diameter of the tubular body 10 may be greater than the outer diameter of the sleeve 21. This allows the pipe body 10 to accommodate the sleeve 21 and move inside the pipe body 10.

In some examples, the tube 10 may be coupled to the sheath 30 in such a manner that the inner diameter is gradually reduced to the outer diameter of the sheath 30. This can reduce the possibility of breakage at the joint between the tube body 10 and the sheath tube 30. In other examples, the tube 10 may be tapered and contracted to the size of the sheath 30. This allows the tube body 10 to be connected to the sheath tube 30 properly.

In some examples, the tube 10 may be integrally formed. This can improve the stability of the pipe 10. In other examples, the tube body 10 may be integrally formed with the sheath 30. This can improve the stability of the entire intravascular ultrasound catheter.

As shown in fig. 4, in some examples, the sealing ring 11 of the pipe body 10 may be disposed inside the pipe body 10. In this case, the seal ring 11 can completely isolate the space inside the pipe body 10. In some examples, the seal ring 11 may have a through hole that enables the transmission shaft 40 to pass through. This ensures the sealing property and ensures the retraction function of the propeller shaft 40. In some examples, inside the tubular body 10, a groove may also be provided, in which the sealing ring 11 is arranged.

As shown in fig. 5, in some examples, the pipe body 10 has a stopper portion that restricts the position of the moving portion 20. This can limit the moving distance of the moving unit 20. In some examples, the stopper is constituted by a seal ring 11. This allows the seal ring 11 to restrict the movement of the moving portion 20. In other examples, the stop portion of the tubular body 10 may limit the distance that the sleeve 21 is retracted. Specifically, the tube body 10 may be provided with a protrusion provided in the inner diameter direction at the most distal end away from the sheath 30, and the sleeve 21 may have a protrusion that fits the protrusion. In this case, the stopper portion can limit the withdrawal distance of the sleeve 21, and prevent the sleeve 21 from completely separating from the tube 10.

Additionally, in some examples, the sleeve 21 may be tapered. Specifically, the cannula 21 may be tapered from a proximal portion near the sheath 30 to a distal portion away from the sheath 30. This enables the sleeve 21 to be fitted to the stopper of the pipe body 10.

In some examples, the inner diameter of the sleeve 21 is greater than the outer diameter of the drive shaft 40 in the moving part 20. Thereby, the drive shaft 40 can be allowed to move in the sleeve 21. In some examples, the sleeve 21 may be cylindrical. In other examples, the sleeve 21 may be cylindrical, prismatic, or other irregular shape.

In some examples, at least a portion of the sleeve 21 is disposed between the drive shaft 40 and the tubular body 10. In this case, the scale on the sleeve 21 can be observed and recorded by shielding the tube 10, thereby obtaining the distance the sleeve 21 moves.

In some examples, the length of the portion of the sleeve 21 disposed between the drive shaft 40 and the tube body 10 is not less than 15 centimeters. Therefore, the withdrawing distance of the intravascular ultrasonic catheter can be ensured to meet the requirement of common interventional operation. In other examples, the length of the portion of the sleeve 21 disposed between the drive shaft 40 and the tubular body 10 may be, for example, 15 centimeters, 16 centimeters, 17 centimeters, 18 centimeters. This ensures that a part of the sleeve 21 is positioned between the drive shaft 40 and the tube body 10 before the completion of the retraction.

In some examples, the sleeve 21 may be ink printed with graduations. In particular, in some examples, the ink may possess biocompatibility. Generally, it is not preferable to use an ink extracted from animals or an ink containing phthalate in the injection device 1 during an interventional procedure.

In some examples, the scale on the sleeve 21 may be in millimeters. In other examples, the scale on the cannula 21 may be in centimeters. In this case, a medical staff or the like can confirm the withdrawal distance of the ultrasonic catheter by confirming the scale on the cannula 21. Additionally, in some examples, the scale on the sleeve 21 may be uniform. In other examples, the scale on the sleeve 21 may also be non-uniform. Specifically, the pitch of the graduations on the cannula 21 may be gradually reduced from a distal portion distal from the sheath 30 to a proximal portion proximal to the sheath 30. This can improve the efficiency of the observation of the retreat distance.

In some examples, the sleeve 21 may be made of at least one of a rubber plastic material, a resin, or a composite thereof. Specifically, in some examples, the sleeve 21 may be made of at least one material selected from ethylene-vinyl acetate copolymer (EVA), polyetheretherketone, polyethylene, and linear low density polyethylene. Additionally, in some examples, the tubular body 10 may be made of glass. The present embodiment is not limited thereto, and the sleeve 21 may be made of metal. This can improve the stability of the sleeve 21.

In some examples, the cannula 21 may also have a connection to a retraction device. This enables connection to the retraction device. Wherein the connecting portion and the sleeve 21 may be integrally formed. In other examples, the outer diameter of the connection portion may be greater than the outer diameter of the sleeve 21. Thus, the connection with the retracting device can be facilitated.

While the present disclosure has been described in detail in connection with the drawings and examples, it should be understood that the above description is not intended to limit the disclosure in any way. Those skilled in the art can make modifications and variations to the present disclosure as needed without departing from the true spirit and scope of the disclosure, which fall within the scope of the disclosure.

Claims

1. An injection device of an ultrasonic catheter in a blood vessel, which is an injection device of the ultrasonic catheter with a sheath and a transmission shaft capable of moving in the sheath, is characterized in that,

the method comprises the following steps:

a tube body having one end connected to the sheath tube and the other end opened, and the transmission shaft penetrating the tube body along a length direction of the tube body, in which a sealing ring having an inner diameter matching an outer diameter of the transmission shaft is provided, and the transmission shaft is movable relative to the sealing ring; and

a moving part having a sleeve accommodating the transmission shaft, the sleeve being movable relative to the tube body, the sleeve further having a scale provided thereon, at least a portion of the sleeve being disposed between the transmission shaft and the tube body,

wherein, the sealing washer with between the sheath pipe the body is provided with the filling opening.

2. The injection device of claim 1,

the inner diameter of the pipe body is larger than the outer diameter of the sleeve.

3. The injection device according to claim 1 or 2,

the tube body is connected with the sheath tube in a mode that the inner diameter is gradually reduced to the outer diameter of the sheath tube.

4. The injection device according to claim 1 or 2,

the tube body is integrally formed.

5. The injection device of claim 1,

the pipe body is provided with a limiting part for limiting the position of the moving part.

6. The injection device of claim 5,

the limiting part is composed of the sealing ring.

7. The injection device of claim 2,

the transmission shaft is provided with a rigid pipe which can penetrate through the pipe body in the length direction of the pipe body.

8. The injection device of claim 1,

in the moving portion, an inner diameter of the sleeve is larger than an outer diameter of the drive shaft.

9. The injection device of claim 7,

the rigid tube is connected to the drive shaft via a weld.