CN113208708A - Percutaneous intervention kit and use method - Google Patents

Abstract

Translated fromChinese

本发明公开了一种经皮介入套件及使用方法，涉及医学外科技术领域，具体涉及一种简便安全的经皮肤构建人工通道到达生物体内组织器官的组合套件。介入套件包括可套装在一起的：针体、针芯、可沿穿刺针轴向滑动扩张器、通道鞘，且针芯配置有摄像功能。由此，本发明提供了一种能够可视、可控的经皮介入套件来执行手术，提高了手术的安全性，减少了患者受到副损伤的风险。

The invention discloses a percutaneous intervention kit and a using method, which relate to the technical field of medical surgery, in particular to a simple and safe combination kit for constructing artificial channels through the skin to reach tissues and organs in vivo. The intervention kit includes a needle body, a needle core, a dilator slidable along the axial direction of the puncture needle, a channel sheath that can be assembled together, and the needle core is configured with a camera function. Thus, the present invention provides a visible and controllable percutaneous intervention kit for performing surgery, which improves the safety of the surgery and reduces the risk of the patient suffering from side injury.

Description

Percutaneous intervention kit and use method

Technical Field

The invention belongs to the technical field of medical surgery, and particularly relates to a percutaneous intervention kit and a using method thereof.

Background

In recent years, the demand for medical treatment has increased. Medical practitioners are also constantly making improvements to surgical procedures. Traditional open surgery creates a large wound from the incision of skin, muscle, fascia to the diseased tissue organ.

Due to the development of minimally invasive surgical techniques, minimally invasive surgery has gradually created a way to complete diagnosis or treatment that requires only the construction of a percutaneous, direct access to the lesion. Minimally invasive surgery eventually results in only a small hole in the skin, with less negative impact on the patient. In clinical application, a fine needle needs to be punctured to reach a pathological change, then a flexible guide wire is placed in an inner cavity of the fine needle, the puncture needle is withdrawn and then placed in a hollow conical dilator along the guide wire to enlarge a needle channel to form a channel with enough width, and finally a tough sheath tube is placed in the formed channel to form a smooth channel which reaches the pathological change so that an endoscope and/or other energy instruments can enter to finish diagnosis or treatment operation.

The operation process can be divided into three steps of positioning, puncturing and expanding, wherein the steps of positioning and puncturing can be completed under the ultrasonic or X-ray monitoring, and the operation process is visual and controllable. However, the ultrasonic monitoring is limited by the imaging principle, only an image of a certain section can be displayed, and the puncture needle only displays one point when passing through the section, so that the depth of the needle tip cannot be accurately sensed. While the use of X-ray monitoring may be better at avoiding these problems, physicians may be exposed to X-ray radiation for long periods of time. On the other hand, the urological operating room in China is rarely equipped with sound X-ray protection due to cost limitation and historical problems.

Moreover, the process that the dilator tears the fascia and the tissue to form the channel needs to overcome larger resistance, the tissue around the channel can be compressed and pulled along the axial direction of the dilator, the distance from the skin to a puncture target point is shortened, the tissue is rebounded after being expanded in the whole layer, the puncture depth displayed at the junction of the puncture needle and the skin is changed again, and the needle point is not displaced. Due to the fact that the whole-process monitoring is not carried out, the change of the puncture depth cannot be accurately estimated, and the change can only be judged by the experience of medical staff. And for the operator, the control of the expansion distance increases the complexity of the operation, and finally, the side injury is caused by the excessively deep expansion depth, which may cause serious complications such as heavy bleeding, intestinal fistula and the like.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a percutaneous intervention kit and a using method thereof, and solves the problem that the operation process cannot be effectively monitored in the expansion process in the related art.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: one aspect provides a percutaneous access kit comprising: the puncture needle comprises a needle core capable of shooting and a needle body capable of containing the needle core, wherein the needle body is of a transparent structure; the dilator can be sleeved on the puncture needle to axially slide; the first limiting device is arranged on the needle body; the second limiting device is arranged on the expander; the first limiting device and the second limiting device are matched with each other to stop the dilator from moving towards the puncture direction; and a channel sheath that can be sleeved on the dilator.

In some embodiments, one end of the needle body is provided with a needle tail, the other end of the needle body is provided with a needle point, and the first limiting part is arranged between the needle tail and the needle point; the dilator comprises a dilator main body, the second limiting piece is arranged in the dilator main body, and the dilator is used for being sleeved on the puncture needle from the needle tail.

In some embodiments, a tapered end portion is provided at one end of the dilator body, when the dilator moves to the extreme position in the puncture direction, the second retaining member abuts against the first retaining member, and a tip opening of the tapered end portion does not exceed an end face of the needle tip.

In some embodiments, the end of the dilator distal to the needle tip is provided with a handle.

In some embodiments, the access sheath comprises: a channel sheath body that is mountable over the dilator; the sealing component is used for being matched with the dilator and sleeved at one end of the channel sheath body far away from the needle point; and a side branch disposed on the channel sheath body.

In some embodiments, the channel sheath body is a transparent body.

In some embodiments, an end of the channel sheath body proximal to the needle tip is provided with an end marker.

In some embodiments, the stylet is provided with a fiber optic camera system.

In some embodiments, the method comprises the steps of: pushing the puncture needle to enable the needle body to reach a target diseased area; continuously monitoring the puncture needle and the target patient area through the needle core camera system to carry out camera monitoring, so that an operator can finely adjust the depth of the needle point of the needle body to be always positioned in the target patient area; pushing the dilator and the channel sheath along the puncture direction until the second limiting piece abuts against the first limiting piece to form a surgical channel; withdrawing the puncture needle and dilator from the channel sheath and leaving the channel sheath in the surgical channel.

In some embodiments, said pushing said puncture needle to reach said target affected area comprises: the needle tail of the puncture needle is pushed, and the needle body and the condition outside the needle body are subjected to camera shooting monitoring through the needle core, so that the needle body reaches the target diseased area. And

compared with the prior art, the percutaneous intervention kit and the use method have the following advantages:

the invention provides a camera shooting function for the stylet. Therefore, the operation is completed under the image monitoring, and the operation process is visual and controllable, thereby effectively ensuring the safety.

The percutaneous intervention kit of the invention is provided with a limit piece. Therefore, the dilator cannot puncture too deeply due to the shortened distance of the puncture target point in the dilation process. Effectively avoiding the possibility of complication caused by side injury in the expansion process.

In the invention, X-ray detection is not needed, so that a special operating room is not needed to be configured, and the operation cost is saved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a drawing of an introducer needle assembly in accordance with an embodiment of the present invention.

Fig. 2 is a diagram of a dilator assembly in an embodiment of the present invention.

Figure 3 is a diagram of a channel sheath assembly in an embodiment of the invention.

Figure 4 is an overall view of a percutaneous access kit in an embodiment of the invention.

Fig. 5 is a flow chart of a percutaneous access kit in an embodiment of the invention.

In the figure: 1. puncturing needle; 2. a dilator; 3. a channel sheath; 11. a needle body; 12. a first limit piece; 13. a needle tip; 14. a needle core; 15. needle tail; 21. a handle; 22. a second limiting member; 23. a dilator body; 24. a tapered end portion; 25. a tip opening; 31. a sealing member; 32. a side branch pipe interface; 33. a side branch; 34. a channel sheath body; 35. end-marking.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, the present invention provides a percutaneous access kit, which is mainly used in the field of surgical medicine, and comprises: a puncture needle 1, an expander 2 and achannel sheath 3; wherein thecore 14 is provided with a camera function. When in use, theneedle core 14 is inserted into the needle body; the dilator 2 is wrapped outside theneedle body 11, and thechannel sheath 3 is wrapped outside the dilator 2.

The integrated kit provided by the embodiment of the invention can complete the operation at one time, and the puncture needle 1 and the dilator 2 are not inserted for multiple times as in the traditional technology. Thereby alleviating the pain of the patient.

Preferably, theneedle core 14 is a fiber optic camera system that is small enough to be placed in the needle to monitor the penetration and expansion process.

Specifically, the dilator 2 is a conical dilator capable of sliding along the axial direction of the needle body, and the whole length of the dilator 2 is smaller than that of the puncture needle 1. This is for the operating personnel to promote pjncture needle 1 more conveniently and carry out the puncture step during the puncture process in the operation, and the change of expander 2 makes the expansion process more smooth and easy.

As shown in fig. 2, the dilator 2 and the puncture needle 1 are provided with a stopper. The limiting device mainly has the function of preventing the conical end of the dilator from exceeding theneedle point 13 of the puncture needle 1 when the dilator 2 slides to cause over-deep dilation and damage to a patient.

It should be noted that the dilator 2 is provided with asecond stopper 22 on the inner wall thereof, and the puncture needle 1 is provided with afirst stopper 12 on the outer wall thereof with respect to theneedle body 11. The two limiting parts can be mutually matched bulges which have the blocking effect and are arranged on theneedle body 11 and the dilator 2, or mutually matched limiting parts which have the friction effect, and only the two limiting parts are required to be matched with each other to limit theneedle point 13 to retract into the dilator 2.

Referring to fig. 3, thechannel sheath body 34 is tubular, the length of the tube body is the same as the length of the dilator 2 after the tapered tip is removed, one end of thehandle 21 of thechannel sheath 3 near the tail of the dilator is designed with anelastic sealing component 31, the central opening of the sealing component can accommodate the dilator 2 with corresponding inner diameter to freely enter and exit, a side hole is arranged on the tube wall, the side hole is connected with a pipeline to form aside branch 33, and a connection structure is arranged on aside branch interface 32 and can be connected with a negative pressure device or a collection device.

Specifically, thechannel sheath 3 and theneedle body 11 are provided with scale marks, so that an operator can know the depth of the puncture needle 1 or thechannel sheath 3 entering the human body through the scale marks when using the puncture needle.

It should be noted that thechannel sheath body 34 is of transparent design with a striking lightcolored end mark 35 near the needle tip. The doctor can observe the operation condition conveniently through the monitoring device.

The following is detailed by a specific example:

a percutaneous access kit essentially comprises three components: puncture needle 1, expander 2 andpassageway sheath 3.

The puncture needle 1 includes: theneedle body 11 with a limit piece, the outer diameter of theneedle body 11 can be set between 0.5 cm and 2cm, the inner diameter can be set between 0.4 cm and 1.95cm, the length is generally 10cm to 30cm, the inclined plane of theneedle point 13 is 30 degrees to 70 degrees, the needle also comprises a separatetype needle core 14, and theneedle point 13 forms a complete inclined plane when theneedle core 14 is inserted into the needle body. Theneedle core 14 is a manufactured optical fiber type imaging system. And afirst limit part 12 is arranged on the outer wall of theneedle body 11. The zero end of the puncture needle 1 far away from theneedle point 13 is provided with aneedle tail 15 which can be pushed and pulled.

The purpose of configuring the camera function for theneedle core 14 is mainly to ensure that the place where theneedle tip 13 passes through is not an important organ such as a blood vessel, an intestinal tract and the like, and because the needle is thin, even if the needle passes through the blood vessel, the needle only needs to be withdrawn and punctured at another place, and no serious result is caused. Without this monitoring procedure, the puncture needle 1 may penetrate the blood vessel, tear the blood vessel once dilation is performed, cause major bleeding, and cause serious injury in the case of other organs

The dilator 2 comprises ahandle 21 at the tail part, a dilatormain body 23 and a dilatorconical end part 24, wherein the tail end of the conical end part is provided with atip opening 25, and the inner wall of the dilator 2 is provided with a second limitingpart 22. The dilator 2 is axially slid on the puncture needle 1 through thehandle 21 during operation.

Specifically, the first limitingmember 12 and the second limitingmember 22 are two limiting protrusions that are engaged with each other, and when the two limiting protrusions are abutted against each other, the dilator 2 cannot slide relative to the puncture needle 1 in the puncture direction.

The channel sheathmain body 34 is tubular, the length of the tube body is consistent with the length of the dilator after the conical tip is removed, the outer diameter can be selected to be 3-10mm, the inner diameter can be selected to be 2-9.5mm, one end of thechannel sheath 3 close to thehandle 21 is provided with an elastic sealing structure, a central opening can accommodate the dilator with the corresponding inner diameter to freely enter and exit, a side hole is arranged on the tube wall at a position 2-10cm away from the sealingmember 31, the aperture is larger than the inner diameter of the channel sheath, a connecting pipeline at the side hole forms aside branch 33, and a connecting structure is arranged at the opening of theside branch 33 and can be connected with a negative pressure device or a collecting device. Thechannel sheath 3 is preferably transparent in its entirety, and theend markers 35 near the needle tip are highlighted and colored markers to facilitate monitoring by a camera system.

The size data provided above is divided into sections because the medical staff should select different sizes of fittings to assemble according to the specific situation of the patient. Meanwhile, the actual kit is not limited to the dimensions given above.

In conclusion, the embodiment provided by the invention mainly adds the camera system in the puncture needle 1, so that the operation process does not need to be monitored by using X-rays, a visual and controllable operation scheme is provided for the surgical operation, and the hidden danger of postoperative complications of patients is reduced. Meanwhile, limiting devices are arranged on the dilator 2 and the puncture needle 1, so that the sliding range of the dilator is limited, and the surgical injury caused by over-deep dilation in the dilation process of the surgery is greatly reduced.

In another aspect, a percutaneous access kit and method of use is provided, comprising the steps of:

a surgery preparation stage: the patient is in prone or lateral position, the operative area is roughly confirmed according to preoperative examination, and then sterilized and draped. Under the sterile state, the optimal puncture point and puncture angle are determined on the surface of the patient body under the monitoring of a detection system.

Referring to fig. 4, the present kit is assembled and the access sheath and dilator are withdrawn to the needle tail.

Referring to fig. 5, a method of using a percutaneous access kit includes the steps of:

s1, the puncture needle 1 is pushed, so that theneedle body 11 reaches a target diseased area.

At the appointed position, theneedle tail 15 of the puncture needle 1 is pushed to puncture theneedle tip 13 into the kidney collecting system, all tissues passed by the needle tip can be observed through monitoring equipment such as ultrasound or X-ray, the advancing direction of theneedle tip 13 is adjusted, and particularly theneedle tip 13 is prevented from penetrating into a blood vessel. The needle is fixed by hand so that theneedle tip 13 does not move any more.

Preferably, the camera system in the puncture needle 1 is also used for monitoring during the puncture phase.

S2, theneedle body 11 and the target diseased area are subjected to camera monitoring through theneedle core 14, so that theneedle body 11 is always located in the target diseased area.

And S3, pushing the dilator 2 and thechannel sheath 3 along the puncture direction until the second limitingpart 22 abuts against the first limitingpart 12 to form a surgical channel.

The dilator 2 and the sheath are pushed to expand the channel formed by puncture along theneedle body 11 towards theneedlepoint 13, so that the channel is enlarged. When the dilator slides to the limiting device, the dilator can not advance any more due to the blocking of the limiting device, theneedle point 13 just retracts into the dilator, and the dilator and the sheath are just positioned in the kidney collecting system.

Ultrasound monitoring is no longer effective during this procedure due to the influence of the dilator 2 entering the body. Therefore, a camera is required to assist in the expansion process. In this process, it is guaranteed through camera monitoring that: the needle tip is immovable in the affected area, and even if the needle tip moves slightly, the needle tip needs to be adjusted and restored in time, otherwise, the operation fails. Taking kidney surgery as an example, the kidney is divided into three layers, theneedle tip 13 needs to be stopped at the middle layer, and the expansion process also needs to ensure that theneedle tip 13 is always at the middle layer, so that the opposite side is not damaged. Because of the large number of blood vessels and vital organs on the contralateral side.

S4, the puncture needle 1 and the dilator 2 are pulled out of thechannel sheath 3, and thechannel sheath 3 is left in the operation channel.

The dilator 2, theneedle body 11 and theneedle core 14 are pulled out, thechannel sheath 3 is left at the channel which is just formed, and the conventional operation endoscope is replaced for operation.

Assuming the application example is kidney stone operation, after crushing stones under an endoscope by using laser or other energy devices, the broken stones are disturbed by the flow of physiological saline injected into the working channel of the endoscope and flow out along the direction of low pressure, at the moment, the endoscope retreats to the rear of theside branch 33 of thechannel sheath 3, and the broken stones are sucked into the extracorporeal collection device by negative pressure through theside branch 33. Traditional T shape percutaneous nephroscope sheath of skinning is the straight tube, and the endoscope need withdraw from outside thepassageway sheath 3 and just can wash the calculus to external, and when the calculus piece count in hundreds of times, the endoscope is passed in and outpassageway sheath 3 repeatedly and can additionally increase a large amount of operating time, and this morbidity collateral branch design makes the endoscope only need can reach the purpose of clearance calculus inpassageway sheath 3 reciprocating motion, practices thrift operating time in a large number.

In the traditional method, a fine needle needs to be punctured, then a flexible guide wire is placed in an inner cavity of the fine needle, the puncture needle is withdrawn, and then a hollow conical dilator is placed along the guide wire to enlarge a needle channel to form a channel with enough width. In the method, the puncturing and expanding steps are carried out in one step without being carried out for multiple times. And the position and the expansion condition of the needle point of the affected area are monitored through a camera in the needle core in the expansion process. Due to the existence of the limiting part, the damage caused by over-expansion of the dilator is prevented, and the complexity and uncertainty of the operation are reduced. Provides a visual and controllable scheme for the expansion process.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

Translated fromChinese

1.一种经皮介入套件，其特征在于，包括：1. A percutaneous intervention kit, characterized in that, comprising:穿刺针(1)，其包括可摄像的针芯(14)和可容纳所述针芯(14)的针体(11),所述针体(11)上设有第一限位件(12)；A puncture needle (1), comprising a camera needle core (14) and a needle body (11) capable of accommodating the needle core (14), the needle body (11) is provided with a first limiting member (12) );扩张器(2)，其可套装在所述穿刺针(1)上做轴向滑动，所述扩张器(2)上设有第二限位件(22)，且所述第二限位件(22)用于与第一限位件(12)相互配合以限制所述扩张器(2)向穿刺方向移动；以及A dilator (2), which can be sleeved on the puncture needle (1) for axial sliding, the dilator (2) is provided with a second limiting member (22), and the second limiting member (22) for cooperating with the first limiting member (12) to limit the movement of the dilator (2) in the puncturing direction; and通道鞘(3)，其套装在所述扩张器(2)上，且所述通道鞘(3)的一端设有供所述扩张器(2)和穿刺针(1)自由进出的开孔。A channel sheath (3) is sleeved on the dilator (2), and one end of the channel sheath (3) is provided with an opening for the dilator (2) and the puncture needle (1) to freely enter and exit.2.如权利要求1所述的经皮介入套件，其特征在于：2. The percutaneous intervention kit of claim 1, wherein:所述针体(11)的一端设有针尾(15)，另一端设有针尖(13)，所述第一限位件(12)设置在所述针尾(15)和针尖(13)之间；One end of the needle body (11) is provided with a needle tail (15), the other end is provided with a needle tip (13), and the first limiting member (12) is arranged on the needle tail (15) and the needle tip (13) between;所述扩张器(2)包括扩张器主体(23)，所述第二限位件(22)设置在所述扩张器主体(23)内，且所述扩张器(2)用于从所述针尾(15)处套装在所述穿刺针(1)上。The dilator (2) includes a dilator main body (23), the second limiting member (22) is arranged in the dilator main body (23), and the dilator (2) is used to extend from the dilator body (23). The needle tail (15) is sheathed on the puncture needle (1).3.如权利要求2所述的经皮介入套件，其特征在于：3. The percutaneous intervention kit of claim 2, wherein:所述扩张器主体(23)一端设有锥形端部(24)，当所述扩张器(2)向穿刺方向移动到极限位置时，所述第二限位件(22)抵持在所述第一限位件(12)上，且所述锥形端部(24)上的尖端开口(25)不超过所述针尖(13)的端面。One end of the dilator main body (23) is provided with a tapered end portion (24), and when the dilator (2) moves to a limit position in the puncturing direction, the second limiting member (22) abuts against the end portion (24). on the first limiting member (12), and the tip opening (25) on the tapered end portion (24) does not exceed the end face of the needle tip (13).4.如权利要求2所述的经皮介入套件，其特征在于所述：所述扩张器(2)远离所述针尖(13)的一端设有手柄(21)。4. The percutaneous intervention kit according to claim 2, characterized in that: the end of the dilator (2) away from the needle tip (13) is provided with a handle (21).5.如权利要求1所述的经皮介入套件，其特征在于，所述通道鞘(3)包括：5. The percutaneous intervention kit according to claim 1, wherein the channel sheath (3) comprises:通道鞘主体(34)，其可套装在所述扩张器(2)上；a channel sheath body (34), which can be sleeved on the dilator (2);用于和扩张器(2)配合的密封构件(31)，其套设在在所述通道鞘主体(34)远离所述针尖(13)的一端；以及A sealing member (31) for cooperating with the dilator (2), which is sleeved on the end of the channel sheath body (34) away from the needle tip (13); and设置在所述通道鞘主体(34)上的侧支管(33)。A side branch tube (33) provided on the channel sheath body (34).6.如权利要求5所述的经皮介入套件，其特征在于：所述通道鞘主体(34)为透明体。6. The percutaneous intervention kit according to claim 5, wherein the channel sheath body (34) is a transparent body.7.如权利要求5所述的经皮介入套件，其特征在于：所述通道鞘主体(34)靠近所述针尖(13)的一端设有末端标记(35)。7. The percutaneous intervention kit according to claim 5, wherein an end mark (35) is provided at one end of the channel sheath body (34) close to the needle tip (13).8.如权利要求1所述的经皮介入套件，其特征在于：所述针芯(14)设有光纤式摄像系统。8. The percutaneous intervention kit according to claim 1, wherein the needle core (14) is provided with an optical fiber camera system.9.一种如权利要求1所述的经皮介入套件的使用方法，其特征在于，该方法包括以下步骤：9. A method of using the percutaneous intervention kit according to claim 1, wherein the method comprises the following steps:推动所述穿刺针(1)，使所述针体(11)到达目标病患区域；Push the puncture needle (1) to make the needle body (11) reach the target patient area;通过所述针芯(14)摄像系统持续监测穿刺针(1)和所述目标病患区域进行摄像监控，以使术者可对所述针体(11)的针尖(13)的深度进行微调使其始终位于所述目标病患区域内；The camera system of the needle core (14) continuously monitors the puncture needle (1) and the target patient area for camera monitoring, so that the operator can fine-tune the depth of the needle tip (13) of the needle body (11). keep it within said target patient area;沿穿刺方向推动所述扩张器(2)和所述通道鞘(3)，直至所述第二限位件(22)抵持在所述第一限位件(12)上，以形成手术通道；Push the dilator (2) and the channel sheath (3) along the puncture direction until the second stopper (22) abuts against the first stopper (12) to form a surgical channel ;从所述通道鞘(3)中拉出所述穿刺针(1)和所述扩张器(2)，并将所述通道鞘(3)留在所述手术通道中。The puncture needle (1) and the dilator (2) are pulled out of the channel sheath (3), and the channel sheath (3) is left in the surgical channel.10.如权利要求9所述的使用方法，其特征在于，推动所述穿刺针(1)，使所述针体(11)到达目标病患区域，包括：10. The using method according to claim 9, characterized in that, pushing the puncture needle (1) so that the needle body (11) reaches the target patient area, comprising:推动所述穿刺针(1)的针尾(15)，并通过所述针芯(14)对所述针体(11)及所述针体(11)外的情况进行摄像监控，以使所述针体(11)到达所述目标病患区域。Push the needle tail (15) of the puncture needle (1), and monitor the situation outside the needle body (11) and the needle body (11) through the needle core (14), so that all The needle body (11) reaches the target patient area.

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