CN117257422A - Puncture device and intervention system - Google Patents

Abstract

The invention provides a puncture device and an interventional system. Wherein, the piercing depth comprises: a puncture unit and an ultrasonic unit; the puncture unit comprises a first catheter and a puncture needle; the puncture needle is nested in the first catheter, and the distal end of the puncture needle extends out of the distal end of the first catheter and is used for puncturing target tissues; the ultrasonic unit comprises an ultrasonic transducer; the ultrasonic transducer is disposed proximate the distal end of the needle for identifying the thickness of the target tissue. Compared with the prior art, the puncture device provided by the invention integrates the ultrasonic transducer and the puncture needle on the same device, so that the combined action of ultrasonic and X-ray imaging can be utilized to realize the accurate positioning of a puncture target point, and an operator can complete puncture by only operating the same device, thereby effectively reducing the complexity of operation and the cost of operation.

Description

Puncture device and intervention system

Technical Field

The invention relates to the technical field of medical instrument preparation, in particular to a puncture device and an interventional system.

Background

Atrial septal puncture is one of the most common techniques for interventional cardiology, which uses an atrial septal needle to create a right heart to left heart passageway in the heart. Among them, the technical difficulty of the atrial septal puncture is how to obtain an accurate puncture position. The prior art uses the imaging function of X-rays to determine the puncture site during surgery. However, the X-ray development can only realize the display on a two-dimensional plane, and the three-dimensional space position of the puncture target can not be acquired, so that the positioning accuracy of the puncture target is lower. In this regard, the prior art adds the auxiliary positioning of the ultrasonic catheter on the basis of the X-rays so as to improve the positioning accuracy of the puncture position. However, the additional use of ultrasound catheters and equipment is required for ultrasound catheter assisted positioning, resulting in increased costs for a single procedure. Meanwhile, in view of the introduction of the ultrasound catheter, the operator often needs to manipulate two instruments simultaneously, which increases the complexity of the operation.

Therefore, a new atrial septum puncture needle is needed to solve the above-mentioned technical problems.

Disclosure of Invention

The invention aims to provide a puncture device and an interventional system, which aim to solve at least one problem of how to improve the positioning accuracy of a puncture target point, how to reduce the operation cost and how to reduce the operation complexity.

In order to solve the above technical problems, the present invention provides a puncture device, comprising: a puncture unit and an ultrasonic unit;

the puncture unit comprises a first catheter and a puncture needle; the puncture needle is nested in the first catheter, and the distal end of the puncture needle extends out of the distal end of the first catheter and is used for puncturing target tissues;

the ultrasonic unit comprises an ultrasonic transducer; the ultrasonic transducer is disposed proximate the distal end of the needle for identifying the thickness of the target tissue.

Optionally, in the puncturing device, the puncturing unit further comprises a second conduit; the second catheter is nested in the puncture needle, and the distal end of the second catheter extends out of the distal end of the first catheter; and the ultrasonic transducer is arranged at the distal end of the second catheter.

Optionally, in the puncture device, an outer side wall of the proximal end of the second catheter is provided with a plurality of guide rails, and the guide rails extend to an inner side wall of the first catheter along a radial direction of the second catheter; the side wall of the puncture needle is correspondingly provided with a plurality of through grooves, so that the guide rail passes through the corresponding through grooves to be connected with the inner side wall of the first catheter; and the through groove extends a set distance along the axial direction of the puncture needle so that the puncture needle can slide relative to the first catheter and the second catheter along the axial direction of the puncture needle.

Optionally, in the puncturing device, the puncturing device has a detection state and a puncturing state; and in the probing state, the distal end of the puncture needle is positioned on the outer sidewall of the second catheter; in the puncturing state, a distal end of the puncture needle extends toward the target tissue and away from a distal end of the second catheter.

Optionally, in the puncture device, a first liquid outlet hole is formed in the side wall of the puncture needle, and a second liquid outlet hole is formed in the side wall of the second catheter; in the detection state, the first liquid outlet holes and the second liquid outlet holes are staggered; in the puncture state, the first liquid outlet hole is communicated with the second liquid outlet hole.

Optionally, in the puncture device, the ultrasonic transducer is disposed in the puncture needle and near a distal end of the puncture needle.

Optionally, in the puncture device, a side of the ultrasonic transducer facing the distal end of the puncture needle is matched with a shape of the distal end of the puncture needle, and the ultrasonic transducer is in a sharp angle shape.

Optionally, in the puncture device, the ultrasonic unit further comprises a wire, one end of the wire is connected with the ultrasonic transducer, and the other end of the wire is led out through the proximal end of the first catheter and/or the proximal end of the puncture needle.

Optionally, in the puncture device, the puncture device further comprises a sealing sleeve, and the sealing sleeve is at least sleeved on the proximal end of the puncture needle and the outer surface of the part of the lead led out.

Optionally, in the puncturing device, the puncturing device further comprises a handle; the handle is provided with an inner cavity penetrating through the axial direction of the handle, and the proximal end of the first catheter and the proximal end of the puncture needle are both arranged in the inner cavity.

Optionally, in the puncture device, the handle further has a push button; the proximal end of the puncture needle extends out of the proximal end of the first catheter and is connected with the push button so as to push the puncture needle to move.

Based on the same inventive concept, the invention also provides an interventional system comprising the puncture device.

In summary, the present invention provides a puncture device and an interventional system. Wherein, the piercing depth comprises: a puncture unit and an ultrasonic unit; the puncture unit comprises a first catheter and a puncture needle; the puncture needle is nested in the first catheter, and the distal end of the puncture needle extends out of the distal end of the first catheter and is used for puncturing target tissues; the ultrasonic unit comprises an ultrasonic transducer; the ultrasonic transducer is disposed proximate the distal end of the needle for identifying the thickness of the target tissue. Compared with the prior art, the puncture device provided by the invention integrates the ultrasonic transducer and the puncture needle on the same device, so that the combined action of ultrasonic and X-ray imaging can be utilized to realize the accurate positioning of a puncture target point, and an operator can complete puncture by only operating the same device, thereby effectively reducing the complexity of operation and the cost of operation.

Drawings

Those of ordinary skill in the art will appreciate that the figures are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

FIG. 1 is a schematic view of a puncture device according to a first embodiment of the present invention.

Fig. 2 is a side view of the distal end of a puncturing device in accordance with a first embodiment of the invention.

Fig. 3 is a schematic view showing the structure of a puncture needle according to a first embodiment of the present invention.

Fig. 4 is a schematic view showing a puncture device in a detecting state according to a first embodiment of the present invention.

Fig. 5 is a schematic view showing a puncture device in a puncture state according to a first embodiment of the present invention.

Fig. 6 is a schematic diagram of the positions of the wires according to the first embodiment of the invention.

FIG. 7 is a cross-sectional view of A-A' of FIG. 6 in accordance with one embodiment of the present invention.

Fig. 8 is a schematic view of the structure of the handle according to the first embodiment of the present invention.

Fig. 9 is an enlarged view of the structure of the region B in fig. 8 in accordance with the embodiment of the present invention.

Fig. 10 is a schematic view of an output puncture device according to a first embodiment of the present invention.

Fig. 11 is a schematic view of ultrasonic detection of a puncturing device in accordance with a first embodiment of the invention.

Fig. 12 is a schematic view of a puncture needle according to a puncture device according to a first embodiment of the present invention, with respect to a target tissue.

Fig. 13 is a schematic view of a lancing device for lancing target tissue according to a first embodiment of the present invention.

FIG. 14 is a schematic view showing the structure of a puncturing device according to a second embodiment of the present invention.

Fig. 15 is a schematic view of the structure of the handle in the second embodiment of the present invention.

Fig. 16 is a schematic diagram of the position of an ultrasonic transducer in a second embodiment of the invention.

And, in the drawings:

101-a first conduit; 102-puncture needle; 1021-pass groove; 1022-first outlet; 1023-proximal end; 1024-distal end; 103-a second conduit; 1031-a guide rail; 1032-a second outlet; 201-an ultrasonic transducer; 202-conducting wires; 300-sealing sleeve; 401-a housing; 402-push button; 403-connecting heads; an M-adapter; q-piercing a sheath set; SVC-superior vena cava; IVC-inferior vena cava; OF-fossa ovalis.

Detailed Description

The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments. It should be further understood that the terms "first," "second," "third," and the like in this specification are used merely for distinguishing between various components, elements, steps, etc. in the specification and not for indicating a logical or sequential relationship between the various components, elements, steps, etc., unless otherwise indicated. And, the definition of "proximal" and "distal" herein is: "distal" generally refers to the end of the medical device that first enters the patient during normal operation, while "proximal" generally refers to the end of the medical device that is near the operator during normal operation; "axial" generally refers to the direction of one end of the tube toward the other.

Example 1

Referring to fig. 1, the present embodiment provides a puncture device, including: a puncture unit and an ultrasonic unit; the puncture unit comprises a first catheter 101 and a puncture needle 102; the puncture needle 102 is nested in the first catheter 101, and the distal end of the puncture needle 102 extends out of the distal end of the first catheter 101 and is used for puncturing target tissue; the ultrasound unit comprises an ultrasound transducer 201; the ultrasonic transducer 201 is disposed proximate to the distal end of the needle 102 for identifying the thickness of the target tissue.

It can be seen that, the puncture device provided in this embodiment integrates the ultrasonic transducer 201 and the puncture needle 102 on the same device, so that not only can the combined action of ultrasonic wave and X-ray imaging be utilized to realize the accurate positioning of the puncture target, but also the operator can complete the operation only by operating the same device, thereby effectively reducing the complexity of the operation and the cost of the operation.

The puncturing device according to the present embodiment is specifically described below with reference to fig. 1 to 13.

With continued reference to fig. 1, the puncture device provided in this embodiment includes a puncture unit and an ultrasonic unit. The puncture unit is used for realizing the puncture of target tissues, releasing contrast liquid and acquiring imaging information of the target tissues by matching with X-ray developing equipment. The ultrasound unit is configured to identify thickness information of the target tissue using ultrasound detection to facilitate an operator in determining an optimal penetration location in the target tissue.

Referring to fig. 1 and 2, the puncture unit includes a first catheter 101, a puncture needle 102, and a second catheter 103. The first catheter 101, the puncture needle 102 and the second catheter 103 are hollow tubes, and the first catheter 101, the puncture needle 102 and the second catheter 103 are sleeved in sequence from outside to inside. In other words, the second catheter 103 is accommodated in the cavity of the puncture needle 102, and the puncture needle 102 is accommodated in the cavity of the first catheter 101. Wherein the first catheter 101 serves as an outer tube of the puncture unit, and serves to protect and support the puncture needle 102 and the second catheter 103. The distal end of the needle 102 is pointed for penetrating the target tissue to form a passageway. The second catheter 103 is used for supporting the ultrasonic transducer 201, so that both ultrasonic detection and X-ray detection are considered, and positioning accuracy of a puncture target point is improved.

Further, the distal end of the puncture needle 102 and the distal end of the second catheter 103 extend out of the first catheter 101, and the distal end of the puncture needle 102 can extend beyond the distal end of the second catheter 103 to puncture the target tissue. Specifically, the outer side wall of the proximal end of the second catheter 103 is provided with a plurality of guide rails 1031, and the guide rails 1031 extend to the inner side wall of the first catheter 101 along the radial direction of the second catheter 103; wherein, the side wall of the puncture needle 102 is correspondingly provided with a plurality of through grooves 1021, so that the guide rail 1031 passes through the corresponding through grooves 1021 to be connected with the inner side wall of the first catheter 101; and the through groove 1021 extends a set distance along the axial direction of the puncture needle 102, so that the puncture needle 102 can slide relative to the first catheter 101 and the second catheter 103 along the axial direction of the puncture needle. In other words, the rail 1031 is a convex rail, and extends toward the inner sidewall of the first duct 101 in the radial direction of the second duct 103. Each of the through grooves 1021 corresponds to a position of one of the guide rails 1031 to ensure that the guide rail 1031 is connected to the inner side wall of the first duct 101 through the corresponding through groove 1021. The specific number and positions of the guide rails 1031 and the through grooves 1021 are not limited in this embodiment. Preferably, a plurality of the guide rails 1031 and a plurality of the through grooves 1021 are provided, and all the guide rails 1031 and all the through grooves 1021 are uniformly distributed along the circumferential direction of the corresponding structure. And, the specific connection position between the proximal end of the second catheter 103 and the inner sidewall of the first catheter 101 is not limited in this embodiment. Optionally, the proximal end of the second catheter 103 is attached to the inner sidewall of the distal end of the first catheter 101.

Illustratively, two guide rails 1031 are disposed on the outer side wall of the proximal end of the second catheter 103, and two corresponding through slots 1021 are disposed on the wall of the puncture needle 102. The two guide rails 1031 protrude toward the inner side wall of the first catheter 101, and respectively pass through the corresponding through grooves 1021 to be connected with the inner side wall of the distal end of the first catheter 101. Preferably, the two guide rails 1031 are located 180 degrees apart from each other in the circumferential direction of the second catheter 103, so as to limit the rotation of the puncture needle 102 in the circumferential direction, and effectively restrict the movement direction of the puncture needle 102.

Optionally, the guide rail 1031 is fixedly connected to the first catheter 101 by a connection manner such as welding, bonding, etc., so as to ensure that the second catheter 103 is fixed relative to the first catheter 101 during the sliding process of the puncture needle 102. And, the guide rail 1031 and the through slot 1021 extend in the axial direction, and the axial length of the guide rail 1031 is smaller than the slot length of the through slot 1021, so as to ensure that the puncture needle 102 can move a certain distance along the self axial direction or the direction close to the self axial direction (offset a certain angle relative to the axial direction). It will be appreciated that the guide rail 1031 and the through slot 1021 define a displacement range of the puncture needle 102 to assist the operator in performing the puncture operation, so as to avoid damage to the organ tissue due to an excessive puncture distance of the puncture needle 102.

Further, since the first catheter 101, the puncture needle 102 and the second catheter 103 are sleeved in sequence from outside to inside, and the puncture needle 102 can move relative to the first catheter 101 and the second catheter 103, the difference between the inner diameter of the first catheter 101 and the outer diameter of the second catheter 103 is greater than or equal to twice the thickness of the catheter wall of the puncture needle 102. And preferably, the puncture needle 102 is tightly attached to the outer wall of the second catheter 103, so as to seal the second catheter 103, and avoid leakage of liquid such as contrast solution. Wherein, a first liquid outlet hole 1022 is provided at the distal end of the puncture needle 102, a second liquid outlet hole 1032 is provided at the distal end of the second catheter 103, and when the puncture needle 102 punctures the target tissue, i.e. is in a puncturing state, the first liquid outlet hole 1022 moves to a position opposite to the second liquid outlet hole 1032, and the two holes are communicated with each other, so that liquid such as contrast solution, normal saline, etc. flows out sequentially through the second liquid outlet hole 1032 and the first liquid outlet hole 1022; and when the puncture needle 102 is in a non-puncture state, i.e., in a detection state, the first fluid outlet 1022 and the second fluid outlet 1032 are offset from each other. That is, the first fluid outlet 1022 and the second fluid outlet 1032 are blocked by the side walls of the puncture needle 102 and the second catheter 103, so as to avoid leakage of the fluid. Note that, in the present embodiment, the number and the pore size of the first liquid outlet holes 1022 and the second liquid outlet holes 1032 are not limited, and when a plurality of the first liquid outlet holes 1022 and the second liquid outlet holes 1032 are provided, the first liquid outlet holes 1022 and the second liquid outlet holes 1032 are each spaced apart along the circumferential direction of the corresponding structure.

Referring to fig. 3, as can be seen from the above description, the puncture needle 102 is disposed between the first catheter 101 and the second catheter 103, and the first catheter 101 and the second catheter 103 are connected via the guide rail 1031. Therefore, to ensure easy installation of the puncture needle 102, it is preferable that the puncture needle 102 is divided into two parts, i.e., a proximal end 1023 and a distal end 1024, and the proximal end 1023 and the distal end 1024 divide the through slot 1021 into two parts, so that when the puncture needle 102 is installed, the proximal end 1023 and the distal end 1024 can be moved from the proximal end and the distal end of the second catheter 103, respectively, and then the two parts of the through slot 1021 are abutted to form the closed through slot 1021, and the closed through slot 1021 is sleeved on the guide rail 1031 of the second catheter 103. Optionally, the proximal portion 1023 and the distal portion 1024 are attached by adhesive, snap fit, or the like.

Referring to fig. 4 and 5, the ultrasonic transducer 201 is disposed at the distal end of the second catheter 103 for identifying the thickness of the target tissue to assist in positioning the puncture target by X-ray imaging. Based on this, the puncture device has two states, respectively: a detection state and a puncture state. As shown in fig. 4, when the puncture device is in the probing state, the distal end of the puncture needle 102 is positioned on the outer side wall of the second catheter 103. In other words, the distal end of the puncture needle 102 does not protrude beyond the distal end of the second catheter 103, so as to avoid damage to the target tissue or other tissue caused by the sharp-angled distal end of the puncture needle 102 during the probing process. And at this time, the most distal end of the puncture device is the distal end of the second catheter 103, and the distal end of the second catheter 103 is abutted against the target tissue, so that the ultrasonic transducer 201 can accurately detect the thickness of the target tissue, and therefore, the operator can select the thinnest position as the puncture target according to the thickness of each region of the target tissue. As shown in fig. 5, when the puncturing device is in the puncturing state, the distal end of the needle 102 extends toward the target tissue and away from the distal end of the second conduit 103. In other words, if the distal end of the puncture needle 102 extends out of the second catheter 103, the distal end of the puncture needle 102 having a pointed shape is the most distal end of the puncture device, so as to facilitate the distal end of the puncture needle 102 to puncture the target tissue through the puncture target spot, thereby realizing establishment of a path. It should be noted that, in the puncture state and the detection state, the ultrasonic transducer 201 may be in an operating state to implement ultrasonic imaging.

Referring to fig. 1, 6 and 7, the ultrasound unit further comprises a wire 202 for transmitting the signal of the ultrasound transducer 201. One end of the lead 202 is connected with the ultrasonic transducer 201 through the puncture needle 102 and the inner cavity of the second catheter 103 in sequence, and the other end of the lead 202 is led out through the proximal end of the puncture needle 102. It should be noted that, when the conduit 202 is provided, the position of the second liquid outlet 1032 needs to be avoided as much as possible to prevent the liquid passage from being blocked or partially blocked, so as to affect the outflow of the liquid. Furthermore, the conductive line 202 in the present embodiment is not limited to one conductive line in the electrical field, and may be a plurality of conductive lines or a conductive line group.

Further, referring to fig. 8 and 9, the lead 202 is led out from the proximal end of the puncture needle 102 and then connected to an adapter M, and the adapter M is further connected to an external electronic device, so as to form thickness information of each region of the target tissue according to signals transmitted by the lead 202, thereby facilitating the operator to determine an optimal puncture target point. Wherein, because the lead 202 needs to be led out from the proximal end of the needle 102, the device further comprises a sealing sleeve 300 in order to avoid the influence of the lead 202 lead out on the injection of liquid. Preferably, the sealing sleeve 300 is sleeved on the proximal end of the first catheter 101, the proximal end of the puncture needle 102 and the outer surface of the lead 202, so as to seal the outlet of the lead 202 and avoid leakage of liquid.

Further, with continued reference to fig. 8 and 9, the lancing device further includes a handle to facilitate the handling of the lancing device by an operator. The handle is provided with a shell 401, and an inner cavity penetrating through the inner cavity in the axial direction of the handle is arranged in the shell 401. The proximal end of the first catheter 101 and the proximal end of the needle 102 extend into the lumen through the distal end of the housing 401. Wherein the proximal end of the first catheter 101 is fixed to the side wall of the lumen to communicate with the lumen. The proximal end of the needle 102 is connected to a push button 402 in the handle. Specifically, the housing 401 has a strip-shaped hollow slot, and a part of the structure of the push button 402 is located on the outer surface of the housing 401, and the rest of the structure extends into the inner cavity through the strip-shaped hollow slot to be connected with the proximal end of the puncture needle 102. Further, the push button 402 may move along the setting direction of the strip-shaped empty slot, so as to drive the puncture needle 102 to move axially. Preferably, the arrangement direction of the strip-shaped empty groove is the axial direction of the housing 401. Thus, based on the push button 402, in the piercing state, the practitioner can push the push button 402 to effect piercing of the target tissue by the distal end of the needle 102. In addition, a connector 403 is further provided at the interface of the inner cavity at the proximal end of the housing 401, so that an injector can be externally connected, so that a liquid such as a contrast solution, a physiological saline solution or a heparin saline solution can enter the inner cavity through the connector 403, and then enter the first catheter 101, the puncture needle 102 and the second catheter 103, and at least flows out through the first liquid outlet 1022 and the second liquid outlet 1032.

For further explanation OF the puncturing device provided in this embodiment, please refer to fig. 1, 9, and 10 to 13, in which the specific usage flow OF the puncturing device is illustrated by taking the puncturing oval fossa OF as an example:

first, the puncture sheath set Q is delivered along a guidewire from the inferior vena cava IVC to the superior vena cava SVC to reach the vicinity OF the fossa ovalis OF. Wherein, puncture sheath group Q is the delivery sheath pipe to for the piercing depth provides the conveying passageway. The guidewire is then withdrawn and the puncturing device is delivered along the lumen of the puncture sheath Q to the distal end of the puncture sheath Q, as shown in fig. 10. At this time, the puncture device is kept in the detection state. Accordingly, as shown in fig. 11, pulling down on the puncture sheath Q, the practitioner will typically have the tactile sensation OF two distinct jumps, indicating that the distal end OF the puncture sheath Q is aligned with the fossa ovalis OF. The puncturing device is then pushed distally, but the distal end of the puncturing device does not exit the inner sheath and is flush with the distal port of the inner sheath. Meanwhile, as shown in fig. 12, the puncture sheath Q and the puncture device are moved in the detection state to confirm the approximate position OF the puncture device with the aid OF X-rays, and then the thinnest position in the fossa ovalis OF is identified by the ultrasonic transducer 201 and is used as a puncture target point. Finally, as shown in fig. 13, the puncture target is aligned, and the push button 402 on the handle is pushed to drive the puncture needle 102 to move, so as to complete the puncture. Generally, after puncture is successful, the ultrasound image should change significantly, and the operator can determine whether puncture is successful based on this.

Based on the same inventive concept, the embodiment also provides an interventional system, which comprises the puncture device.

It can be seen that, in summary, the puncture device and the interventional system provided in this embodiment set the ultrasonic transducer 201 on the second catheter 103, so as to realize combination with the puncture needle 102, not only can utilize the combined action of ultrasonic wave and X-ray imaging to realize accurate positioning of the puncture target, but also the operator can complete the operation only by operating the same device, thereby effectively reducing the complexity of the operation and the cost of the operation.

< example two >

In order to further reduce the manufacturing cost of the puncture device and simplify the structure, the embodiment also provides the puncture device. Referring to fig. 14 to 16, the present embodiment provides a puncture device, including: a puncture unit and an ultrasonic unit; the puncture unit comprises a first catheter 101 and a puncture needle 102; the puncture needle 102 is nested in the first catheter 101, and the distal end of the puncture needle 102 extends out of the distal end of the first catheter 101 and is used for puncturing target tissue; the ultrasound unit comprises an ultrasound transducer 201; the ultrasonic transducer 201 is disposed at the distal end of the needle 102 for identifying the thickness of the target tissue. In this embodiment, reference is made to the related descriptions in the first embodiment.

It will be appreciated that in this embodiment, the ultrasonic transducer 201 is disposed directly within the needle 102 and near the distal end of the needle 102. That is, the puncture needle 102 functions not only as a puncture but also as a support and housing for the ultrasonic transducer 201. Based on this, in this embodiment, one end of the wire 202 connected to the ultrasonic transducer 201 needs to extend to the distal end of the puncture needle 102, while the other end is led out through the proximal end of the puncture needle 102 or the first catheter 101 and connected to the conversion head M, so as to realize the transmission of the ultrasonic signal.

Further, the proximal ends of the first catheter 101 and the puncture needle 102 are both disposed within the handle. That is, the puncture needle 102 does not need to slide relative to the first catheter 101, and the puncture needle 102 and the proximal end of the first catheter 101 are fixedly accommodated in and communicate with the inner cavity of the housing 401 of the handle. And preferably, the housing 401 is integrally molded, so that the lead 202 and the lead-out interface gap of the proximal end of the puncture needle 102 or the first catheter 101 are also sealed by plastic injection, and in this embodiment, a sealing sleeve is not required to be provided to ensure tightness, so that the structure is further simplified.

Further, since the ultrasonic transducer 201 is directly disposed at the distal end of the puncture needle 102, based on the circular structure of the ultrasonic ring device 201, a certain distance exists between the sharp point of the distal end of the puncture needle 102 and the ultrasonic ring device 201, and in the process of puncturing, the target tissue, the ultrasonic ring device 201 and the distal end of the puncture needle 102 may enclose a cavity, which may have a negative effect during puncturing, for example: the puncture process is not smooth or has the phenomenon of jamming. In addition, during penetration, the target tissue may cause compression to the ultrasound transducer 201, causing the ultrasound transducer 201 to shift. Therefore, referring to fig. 16, in this embodiment, the side of the ultrasonic transducer 201 facing the distal end of the puncture needle 102 is adapted to the shape of the distal end of the puncture needle 102, and is pointed. In other words, the shape of the ultrasonic transducer 201 matches the shape of the bevel of the tip of the distal end of the needle 102 to eliminate the cavity. Based on this, not only can the target tissue be prevented from directly pressing the ultrasonic transducer 201, from being displaced or damaged, but also the resistance to the ultrasonic transducer 201 during puncturing can be reduced, and damage can be avoided. Furthermore, the larger surface area of the beveled ultrasound transducer 201 may result in better quality ultrasound imaging with the same outer diameter than a circular flat surface.

It can be appreciated that when the puncture device provided in this embodiment is used to puncture the target tissue, and after the puncture target position is confirmed by ultrasonic imaging and X-ray imaging, the operator can directly push the handle to push the puncture needle 102, so as to puncture the target tissue, and establish a channel.

Based on the same inventive concept, the embodiment also provides an interventional system, which comprises the puncture device.

In summary, the puncture device and the interventional system provided in this embodiment set the ultrasonic transducer 201 on the distal end of the puncture needle 102, so that the puncture needle 102 not only plays a role in puncture, but also can take into account ultrasonic imaging and X-ray imaging, thereby realizing accurate positioning of a puncture target point. And the puncture device has the advantages of simple structure, convenient operation and low preparation cost, and can effectively reduce the complexity of operation and the cost of operation.

In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, so that the same similar parts of each embodiment are referred to each other.

It should also be appreciated that while the present invention has been disclosed in the context of a preferred embodiment, the above embodiments are not intended to limit the invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims (12)

1. A lancing device, comprising: a puncture unit and an ultrasonic unit;

the puncture unit comprises a first catheter and a puncture needle; the puncture needle is nested in the first catheter, and the distal end of the puncture needle extends out of the distal end of the first catheter and is used for puncturing target tissues;

the ultrasonic unit comprises an ultrasonic transducer; the ultrasonic transducer is disposed proximate the distal end of the needle for identifying the thickness of the target tissue.

2. The lancing device of claim 1, wherein the lancing unit further comprises a second conduit; the second catheter is nested in the puncture needle, and the distal end of the second catheter extends out of the distal end of the first catheter; and the ultrasonic transducer is arranged at the distal end of the second catheter.

3. The lancing device of claim 2, wherein an outer sidewall of the proximal end of the second catheter is provided with a plurality of rails and the rails extend radially of the second catheter to an inner sidewall of the first catheter; the side wall of the puncture needle is correspondingly provided with a plurality of through grooves, so that the guide rail passes through the corresponding through grooves to be connected with the inner side wall of the first catheter; and the through groove extends a set distance along the axial direction of the puncture needle so that the puncture needle can slide relative to the first catheter and the second catheter along the axial direction of the puncture needle.

4. A lancing device according to any one of claims 1 to 3, wherein the lancing device has a detection state and a lancing state; and in the probing state, the distal end of the puncture needle is positioned on the outer sidewall of the second catheter; in the puncturing state, a distal end of the puncture needle extends toward the target tissue and away from a distal end of the second catheter.

5. The puncturing device as claimed in claim 4, wherein the side wall of the puncturing needle is provided with a first liquid outlet hole, and the side wall of the second conduit is provided with a second liquid outlet hole; in the detection state, the first liquid outlet holes and the second liquid outlet holes are staggered; in the puncture state, the first liquid outlet hole is communicated with the second liquid outlet hole.

6. The lancing device of claim 1, wherein the ultrasound transducer is disposed within the lance and near a distal end of the lance.

7. The lancing device of claim 6, wherein a side of the ultrasonic transducer facing the distal end of the lancet is adapted to the topography of the distal end of the lancet and each is pointed.

8. The puncturing device of claim 1, 2 or 6, wherein the ultrasound unit further comprises a wire, one end of which is connected to the ultrasound transducer, and the other end of which is led out through the proximal end of the first catheter and/or the proximal end of the puncture needle.

9. The lancing device of claim 8, further comprising a sealing sleeve that is disposed over at least a proximal end of the lance and an outer surface of the lead that exits.

10. The lancing device of claim 1, wherein the lancing device further comprises a handle; the handle is provided with an inner cavity penetrating through the axial direction of the handle, and the proximal end of the first catheter and the proximal end of the puncture needle are both arranged in the inner cavity.

11. The lancing device of claim 10, wherein the handle further comprises a push button; the proximal end of the puncture needle extends out of the proximal end of the first catheter and is connected with the push button so as to push the puncture needle to move.

12. An interventional system comprising a puncturing device according to any of claims 1-11.