CN120605079A

CN120605079A - A backflow-proof multi-channel puncture and drainage needle

Info

Publication number: CN120605079A
Application number: CN202510927455.6A
Authority: CN
Inventors: 刘淞淞; 薛志强; 曾莹; 孙敬杰; 王玲的
Original assignee: General Hospital of Chinese PLA Hainan Branch
Current assignee: General Hospital of Chinese PLA Hainan Branch
Priority date: 2025-07-07
Filing date: 2025-07-07
Publication date: 2025-09-09

Abstract

The present invention relates to an anti-backflow multi-channel puncture and drainage needle, comprising a needle body, a main drainage channel, a flushing channel, a drug perfusion channel and an anti-backflow component; the main drainage channel is coaxially arranged inside the needle body and extends along the length direction of the needle body, and is used to aspirate tissue fluid at the pathological site; the flushing channel and the drug perfusion channel are arranged inside the main drainage channel, and both extend along the length direction of the main drainage channel; the flushing channel is used to transport cleaning fluid to flush and clean the pathological site; the drug perfusion channel is used to transport drug solution to the pathological site; the anti-backflow component is arranged in the main drainage channel to prevent tissue fluid from backflowing, and its beneficial effect is that it has multi-channel functions and anti-backflow performance while having a more reasonable structure and can better adapt to different clinical application scenarios.

Description

Anti-countercurrent multichannel puncture drainage needle

Technical Field

The invention relates to the field of medical instruments, in particular to an anti-backflow multichannel puncture drainage needle.

Background

At present, in modern interventional therapy, the application scene of a puncture drainage needle is continuously expanded, and particularly in the fields of malignant tumor palliative treatment (such as peritoneal effusion drainage), hematoma removal in hepatobiliary surgery, deep abscess debridement and the like, strict requirements are put forward on the space efficiency and the functional integration level of the instrument. The structural defects of the conventional puncture needles are increasingly prominent.

The multichannel puncture needle in the present stage has low space utilization rate, adopts a channel parallel design, and arranges each channel in the needle body in parallel, so that the diameter of the needle body is obviously increased, when the puncture operation is performed, the damage to the tissue of a patient is larger, especially when deep tissue puncture or narrow space operation is performed, the operation difficulty is greatly improved, complications are easily caused, and the clinical requirement for minimally invasive treatment is difficult to meet.

Disclosure of Invention

First, the technical problem to be solved

In view of the above-mentioned shortcomings and disadvantages of the prior art, the present invention provides an anti-reflux multichannel puncture drainage needle, which solves the technical problem that the space utilization rate is low and the diameter of the needle body is significantly increased in the prior art.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:

The invention provides an anti-reflux multichannel puncture drainage needle which comprises a needle body, a main drainage channel, a flushing channel, a medicine filling channel and an anti-reflux component, wherein the main drainage channel is coaxially arranged in the needle body and extends along the length direction of the needle body and is used for sucking tissue fluid at a pathological position, the flushing channel and the medicine filling channel are arranged in the main drainage channel and extend along the length direction of the main drainage channel, the flushing channel is used for conveying cleaning liquid to flush and clean the pathological position, the medicine filling channel is used for conveying liquid to the pathological position, and the anti-reflux component is arranged in the main drainage channel and is used for preventing the tissue fluid from flowing backwards.

Optionally, the main drainage channel is provided with a main drainage port and a side drainage hole group, the main drainage port is positioned at the tip of the needle body, and the side drainage hole group is arranged on the inclined surface of the needle body and has a distance of 4-5 mm from the tip.

Optionally, the side drainage hole group comprises a plurality of side suction holes, the side suction holes are arranged in the needle body along the circumferential direction of the needle body, and the included angle between the direction of the side suction holes and the axis of the needle body is 25-30 degrees.

Optionally, the flushing channel is provided with a plurality of flushing pipes, the inlets of the flushing pipes are communicated with the flushing channel, the outlets of the flushing pipes are positioned on the inclined plane of the needle point and are 2-3 mm away from the side drainage hole group, and the included angle between the outlet direction of the flushing pipes and the axis of the needle body is 20-25 degrees.

Optionally, the cross sections of the main drainage channel, the flushing channel and the medicine infusion channel are all round, and the diameter ratio of the main drainage channel to the flushing channel to the medicine infusion channel is 5:2:1.

Optionally, the anti-reflux assembly comprises a first valve and a second valve, wherein the first valve is arranged at the middle section of the main drainage channel, and the second valve is arranged at the outlet of the tail end of the main drainage channel.

The first valve comprises an umbrella-shaped valve leaf, a guide rod, an umbrella rib component and a spring, wherein the guide rod is arranged in the main drainage channel along the axial direction of the main drainage channel, the middle part of the umbrella-shaped valve leaf is slidably arranged on the guide rod through the umbrella rib component, the umbrella-shaped valve leaf is fixedly connected to the guide rod through the umbrella rib component, the spring is sleeved on the guide rod, one end of the spring is abutted to the end part of the guide rod, the other end of the spring is abutted to the umbrella-shaped valve leaf of the guide rod, negative pressure is generated during drainage of the main drainage channel to drive the middle part of the umbrella-shaped valve leaf to slide and compress the spring along the guide rod, and the umbrella-shaped valve leaf realizes closed conduction of the main drainage channel under the action of the umbrella rib component.

The umbrella rib assembly comprises a fixed ring, a sliding ring, a plurality of supporting rods and a plurality of connecting rods, wherein the sliding ring is slidably sleeved on the guide rod, the fixed ring is fixedly arranged on the guide rod, the sliding ring is closer to the tail of the needle body than the fixed ring, the plurality of supporting rods are uniformly distributed on umbrella-shaped valve blades along the circumferential direction, one ends of the supporting rods are rotatably connected with the sliding ring, one ends of the connecting rods are correspondingly connected to the plurality of supporting rods one by one, and the other ends of the connecting rods are rotatably connected with the fixed ring.

Optionally, the second valve comprises an elastic valve piece and a sealing ring, the sealing ring is arranged at the outlet of the main drainage channel, the elastic valve piece is rotatably arranged on the sealing ring and used for selectively sealing the main drainage channel, the elastic valve piece can be abutted against the sealing ring when sealing the outlet of the main drainage channel, and negative pressure generated when the main drainage channel drains can drive the elastic valve piece to rotate in a vertical plane to conduct the outlet of the main drainage channel.

Optionally, the elastic flap is provided with an anticoagulant coating, and the ratio of the thickness of the anticoagulant coating to the thickness of the elastic flap is 1:1000-1:5000.

(III) beneficial effects

The beneficial effects of the invention are as follows:

According to the anti-countercurrent multichannel puncture drainage needle, the flushing channel and the medicine filling channel are arranged in the main drainage channel in a coaxial nested mode, the mode that the traditional multichannel puncture drainage needles are arranged in parallel is changed, additional reserved space is not needed for each channel, the diameter of the needle body is effectively reduced while the multichannel function is met, the needle body structure is more compact, better space conditions are provided for puncture operation, and the anti-countercurrent multichannel puncture drainage needle can better adapt to the operation environment and reduce the puncture difficulty particularly when in deep or narrow puncture. The main drainage channel, the flushing channel and the medicine perfusion channel are reasonably distributed, so that the puncture drainage needle can synchronously realize the functions of sucking tissue liquid at pathological positions, conveying cleaning liquid to flush and clean the pathological positions, conveying liquid medicine to the pathological positions and the like in the same operation. The multi-channel cooperative work avoids the defect that the traditional single-channel or single-function puncture needle needs to frequently replace instruments or perform multi-step operation in the treatment process, provides convenience for clinical treatment, and makes the treatment process more efficient. The anti-countercurrent component is arranged in the main drainage channel, can effectively prevent tissue fluid from countercurrent, provides safety guarantee for the puncture drainage process, avoids adverse conditions such as infection diffusion and aggravation caused by the tissue fluid countercurrent, enhances the safety and reliability of puncture drainage operation, and ensures the safety of patients in the treatment process. Compared with the prior art, the multifunctional anti-reflux device has the advantages that the multifunctional anti-reflux device is more reasonable in structure, can be better adapted to different clinical application scenes, can play a good role in the field of hepatobiliary surgery requiring fine operation, or in the field of tumor treatment and the like with high requirements on treatment effect and safety, provides powerful support for clinical operation of doctors, and also provides better guarantee for treatment effect of patients.

Drawings

FIG. 1 is a schematic view of the overall structure of an anti-reflux multichannel puncture drainage needle according to an embodiment of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of an anti-reflux multichannel puncture drainage needle with a tensioner according to embodiment 1 of the present invention;

FIG. 4 is a schematic view of the installation of a first valve in a main passageway according to embodiment 1 of the present invention;

FIG. 5 is a schematic view showing the structure of a first valve in embodiment 1 of the present invention;

FIG. 6 is a schematic illustration of the installation of a second valve at the outlet of a primary drainage channel in example 1 of the present invention;

Fig. 7 is a schematic structural view of a second valve in embodiment 1 of the present invention.

[ Reference numerals description ]

1, A needle body, 2, a main drainage channel, 21, a main drainage port, 22, a side suction hole, 3, a flushing channel, 31, a flushing pipe, 4, a medicine pouring channel, 51, umbrella-shaped valve blades, 52, a guide rod, 53, a spring, 54, a fixed ring, 55, a sliding ring, 56, a supporting rod, 57, a connecting rod, 61, an elastic valve blade and 62, and a sealing ring.

Detailed Description

In order that the above-described aspects may be better understood, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Example 1:

As shown in fig. 1-3, the specific embodiment of the invention provides an anti-reflux multi-channel puncture drainage needle, which comprises a needle body 1, a main drainage channel 2, a flushing channel 3, a medicine infusion channel 4 and an anti-reflux component, wherein the main drainage channel 2 is coaxially arranged in the needle body 1 and extends along the length direction of the needle body 1 and is used for sucking tissue fluid at a pathological position, the flushing channel 3 and the medicine infusion channel 4 are arranged in the main drainage channel 2 and extend along the length direction of the main drainage channel 2, the flushing channel 3 is used for conveying cleaning liquid to flush and clean the pathological position, the medicine infusion channel 4 is used for conveying medicine liquid to the pathological position, and the anti-reflux component is arranged in the main drainage channel 2 and is used for preventing the tissue fluid from flowing backwards.

Specifically, the flush channel 3 and the drug infusion channel 4 are arranged in the coaxial nested design in the main drainage channel 2, the mode that the traditional multichannel puncture drainage needles are arranged in parallel is changed, additional reserved space is not needed for each channel, the diameter of the needle body 1 is effectively reduced while the multichannel function is met, the structure of the needle body 1 is more compact, better space conditions are provided for puncture operation, and the puncture needle can better adapt to the operation environment and reduce the puncture difficulty especially when in deep or narrow puncture. The main drainage channel 2, the flushing channel 3 and the medicine perfusion channel 4 are reasonably distributed, so that the puncture drainage needle can synchronously realize the functions of sucking tissue liquid at pathological positions, conveying cleaning liquid to flush and clean the pathological positions, conveying liquid medicine to the pathological positions and the like in the same operation. The multi-channel cooperative work avoids the defect that the traditional single-channel or single-function puncture needle needs to frequently replace instruments or perform multi-step operation in the treatment process, provides convenience for clinical treatment, and makes the treatment process more efficient. The anti-countercurrent component is arranged in the main drainage channel 2, can effectively prevent tissue fluid from countercurrent, provides safety guarantee for the puncture drainage process, avoids adverse conditions such as infection diffusion and aggravation caused by the tissue fluid countercurrent, enhances the safety and reliability of puncture drainage operation, and ensures that patients have safety guarantee in the treatment process. Compared with the prior art, the multifunctional anti-reflux device has the advantages that the multifunctional anti-reflux device is more reasonable in structure, can be better adapted to different clinical application scenes, can play a good role in the field of hepatobiliary surgery requiring fine operation, or in the field of tumor treatment and the like with high requirements on treatment effect and safety, provides powerful support for clinical operation of doctors, and also provides better guarantee for treatment effect of patients.

In the embodiment, the length of the needle body 1 is 15-20 cm, and the needle body is suitable for puncture drainage of various clinical scenes such as abdominal cavity, thoracic cavity and the like, can meet the requirements of deep tissue operation, is convenient for medical staff to hold and operate, ensures the accuracy of puncture, has the outer diameter of the needle body 1 not exceeding 3mm, realizes minimally invasive, has less damage to patient tissues compared with the traditional puncture needle, reduces the infection risk of puncture parts, and reduces the postoperative recovery time of patients. The inner wall of the main drainage channel 2 is integrated with a plurality of saw teeth, a plurality of saw tooth structures are distributed along the length direction of the main drainage channel 2, and a plurality of saw tooth structures distributed along the length direction of the main drainage channel 2 change the surface morphology of the inner wall of the channel and increase the contact area of drainage liquid and the wall of the channel. When the drainage liquid flows through the saw teeth, the saw teeth generate a turbulent flow effect, so that the flowing state of the drainage liquid is converted into turbulent flow from laminar flow, the flow speed of the drainage liquid is accelerated, the overall drainage efficiency is improved, and the drainage time is shortened. The transverse curvature r1=0.23-0.27 mm and the longitudinal curvature r2=0.5-0.6 mm of the serrations to form minute grooves and protrusions. In the drainage process, the structures can clamp substances such as tissue fragments, blood clots and the like which can block the channel, so that the substances are prevented from accumulating in the channel, meanwhile, the blocking effect of the saw teeth on the blocking object can guide the fluid to disperse or separate the blocking object, the blocking risk is further reduced, and the continuity and the stability of the drainage process are ensured.

Further, as shown in fig. 1 and 2, the main drainage channel 2 has a main drainage port 21 and a side drainage port group. The main drainage port 21 is positioned at the tip of the needle body 1, so that a focus core area can be accurately positioned, the side drainage hole group is arranged on the inclined surface of the needle body 1 and is 4-5 mm away from the tip, and a multidirectional drainage layout is formed. The main drainage port 21 realizes the targeted suction of the focus center, the side drainage hole group enlarges the drainage coverage, avoids drainage dead angles possibly caused by a single liquid suction port, and improves the whole drainage efficiency. The side drainage hole group keeps a reasonable distance from the tip, so that direct damage to surrounding tissues in the puncturing process can be reduced, and the bleeding risk is reduced.

In this embodiment, the side drainage hole group includes a plurality of side suction holes 22, which are uniformly arranged along the circumferential direction of the needle body 1, and the direction of the side suction holes 22 and the axis of the needle body 1 form an included angle of 25 ° to 30 °. The side suction holes 22 distributed circumferentially are matched with a specific angle design, so that drainage liquid uniformly enters the main channel, turbulence is reduced, drainage resistance is reduced, and drainage smoothness is improved. The multi-angle side suction holes 22 are distributed to disperse the suction direction of tissue fragments, avoid the blockage of a single pore canal and ensure the continuity of the drainage process.

Further, as shown in fig. 1 and 2, in this embodiment, the flushing channel 3 is provided with a plurality of flushing pipes 31, the inlet of which is communicated with the flushing channel 3, the outlet is located at the inclined plane of the needle tip and is 2-3 mm away from the side drainage hole group, and the outlet direction of the flushing pipe 31 forms an angle of 20-25 ° with the axis of the needle body 1. The distance and angle between the outlet of the flushing pipe 31 and the side drainage hole group are designed, so that the cleaning liquid can accurately flush the area near the side drainage hole 22, and tissue fragments or secretion which can block the pore canal can be timely removed, and the drainage effect is enhanced. The directional ejection of the flushing liquid can form a synergistic effect with drainage, focus cleaning is completed while drainage is performed, infection risk is reduced, and treatment effect is improved.

Preferably, in the present embodiment, the cross sections of the main drainage channel 2, the flushing channel 3 and the drug infusion channel 4 are all circular, and the diameter ratio is 5:2:1. The circular cross section is convenient to process, the fluid resistance is small, the optimal distribution of the functions of each channel is realized in a limited space by a reasonable diameter ratio, the flow requirement of the main drainage channel 2 is ensured, and a proper fluid channel is provided for flushing and medicine filling. The flow gradient formed by the diameter ratio can reduce the fluid interference among all channels and ensure the synchronous and smooth operation of drainage, flushing and medicine injection.

Further, the anti-reflux assembly comprises a first valve arranged at the middle section of the main drainage channel 2 and a second valve arranged at the tail end outlet, so that a multistage anti-reflux barrier is formed. The double valve designs of the middle section and the tail end realize the graded blocking of tissue liquid countercurrent, improve the reliability and the safety of countercurrent prevention, and avoid the possible failure risk of a single valve. The middle section and the tail end of the main drainage channel 2 are covered, and the backflow prevention control is carried out on different stages and positions in the drainage process, so that the drainage safety is comprehensively ensured.

Further, as shown in fig. 4 and 5, the first valve is comprised of umbrella leaflets 51, guide rods 52, rib assemblies and springs 53. The guide rod 52 is axially arranged along the main drainage channel 2, the middle part of the umbrella-shaped valve leaf 51 is slidably sleeved on the guide rod 52 through an umbrella rib assembly and is fixedly connected, the spring 53 is sleeved on the guide rod 52, and two ends of the spring 53 respectively abut against the end part of the guide rod 52 and the umbrella-shaped valve leaf 51. The drainage negative pressure drives the middle part of the umbrella-shaped valve leaf 51 to slide to compress the spring 53, and the valve leaf is closed to conduct the main channel through the umbrella rib component. The valve opening mechanism driven by negative pressure can automatically adjust the state of the valve leaves according to the drainage pressure, realize the dynamic conduction of the drainage channel and ensure the timeliness of drainage. The cooperation of spring 53 and rib subassembly makes the valve leaf reliably switch on when the drainage, in time closes when stopping the drainage, effectively prevents that the middle section from flowing backward, guarantees drainage efficiency simultaneously.

In particular, as shown in fig. 4 and 5, the rib assembly includes a stationary ring 54, a sliding ring 55, a plurality of struts 56, and a plurality of links 57. The sliding ring 55 can be sleeved on the guide rod 52 in a sliding way, the fixed ring 54 is fixed on the guide rod 52, the sliding ring 55 is closer to the tail of the needle body 1, the supporting rods 56 are circumferentially and uniformly arranged on the umbrella-shaped valve blades 51, one end of each supporting rod is connected with the sliding ring 55, and the other end of each connecting rod 57 is connected with the fixed ring 54. The structures of the fixed ring 54, the sliding ring 55, the supporting rod 56 and the connecting rod 57 form a stable mechanical transmission system, so that the umbrella-shaped valve leaves 51 are ensured to synchronously and stably open and close in the sliding process, and the risk of poor drainage or backflow caused by inconsistent valve leaf actions is avoided. The struts 56 and the connecting rods 57 which are circumferentially and uniformly arranged enhance the overall structural strength of the rib assembly, so that the rib assembly can bear the fluid pressure in the drainage process, and the valve can work reliably for a long time.

Further, as shown in fig. 6 and 7, the second valve includes a sealing ring 62 provided at the outlet of the main drainage channel 2 and a resilient flap 61 rotatably mounted to the sealing ring 62. The elastic flap 61 can selectively close the channel outlet, and when the channel outlet is closed, the elastic flap 61 can be driven by the drainage negative pressure to rotate in a vertical plane to conduct the outlet by abutting against the sealing ring 62. The elastic flap 61 and the sealing ring 62 are matched to form a reliable sealing structure at the outlet to prevent tissue fluid from flowing back from the tail end, so that the drainage safety is ensured. The valve can rapidly respond to the change of drainage pressure by adopting a rotation opening mode driven by negative pressure, and the outlet is timely conducted or closed, so that the smoothness and safety of drainage are ensured. In this embodiment, the elastic petals 61 have an anticoagulant coating thereon, and the ratio of the coating thickness to the petal thickness is 1:1000-1:5000. The anticoagulation coating can reduce the adhesion and coagulation of blood components on the surfaces of the petals, reduce the risk of thrombosis, is suitable for long-term implantation and improves the biocompatibility of the instrument. The reasonable ratio of the coating to the thickness of the valve sheet ensures the anticoagulation function, and simultaneously does not influence the mechanical performance and the action sensitivity of the elastic valve sheet 61, thereby ensuring the normal operation of the valve.

The use condition of the anti-countercurrent multichannel puncture drainage needle provided by the embodiment is that under the condition of image guidance (such as B ultrasonic and CT), the tip of the needle body 1 is aligned with the focus center, the main drainage port 21 is firstly contacted with tissue fluid, and the side drainage hole group of the inclined surface of the needle body 1 avoids blood vessels in the needle inserting process. The negative pressure suction device is started, the sawtooth structure of the main drainage channel 2 disturbs fluid, the drainage efficiency is improved, meanwhile, tissue fragments are clamped to prevent blockage, the umbrella-shaped valve blades 51 of the first valve in the middle section are closed by the compression springs 53 under the action of negative pressure to form an annular drainage channel, and the elastic valve blades 61 of the second valve at the tail end are rotated and opened under the action of negative pressure to ensure smooth drainage. When the negative pressure is removed, the spring 53 of the first valve returns to push the umbrella-shaped valve blades 51 to open, and the elastic valve blades 61 of the second valve return to abut against the sealing ring 62, so that the countercurrent path is doubly blocked. During the focus flushing, the cleaning liquid is delivered to the pathological part through the flushing channel 3. After the flushing, the liquid medicine is delivered to the pathological position through the medicine infusion channel 4.

Example 2:

the present embodiment provides an anti-reflux multichannel puncture drainage needle, including all the structures of the puncture drainage needle in embodiment 1.

In the embodiment, the diameter of the flushing channel 3 is 0.7-0.9 mm, so that moderate flushing fluid flow is ensured, sufficient flushing force can be provided to clear away tissue fragments and inflammatory substances at the focus, and impact damage to the focus area due to overlarge flow is avoided. The flow rate of the flushing liquid in the diameter range can be stably maintained at 8-12mL/min, and the requirement of clinical routine debridement is met. The axial distance between the flushing channel and the main drainage channel 2 is 1.1-1.3 mm, so that the structural strength of the flushing channel 3 is ensured, and meanwhile, the fluid between the two channels is ensured not to interfere with each other. The inlet of the flushing channel 3 is positioned at the side of the tail end of the needle body 1 and is connected with an external flushing bottle, and a one-way valve is arranged at the inlet of the flushing channel 3, so that the reverse flow pollution of flushing liquid can be prevented.

In this embodiment, the diameter of the drug infusion channel 4 is 0.35-0.45 mm, the inlet of the drug infusion channel 4 is located at the tail end of the needle body 1, the inlet of the drug infusion channel 4 is communicated with the drug infusion pump, and a flow regulating valve is arranged at the inlet of the drug infusion channel 4. The number of the outlets of the drug infusion channels 4 is 2-3, and the drug infusion channels are uniformly arranged on the inclined surface of the needle body 1 along the circumferential direction of the needle body 1 at a distance of 1-2 mm from the needle tip, so that the drug can be precisely released in a focus core area, and the drug infusion device is suitable for scenes needing high-concentration drug effects such as local tumor chemotherapy and can reduce the influence of drug diffusion on surrounding normal tissues. The outlet of the medicine pouring channel 4 is arranged near the outlet of the flushing channel 3, and the flow of flushing liquid is utilized to drive medicine to diffuse, so that the medicine coverage area is enlarged, and meanwhile, the medicine can be prevented from being too high in local concentration, and the medicine is suitable for large-area inflammation treatment. The outlet direction of the medicine pouring channel 4 forms an included angle of 15-30 degrees with the axis of the needle body 1, so that the medicine is sprayed out at a certain angle, the penetration depth of the medicine in tissues is increased, and the direct impact on the tissues is reduced.

Example 3:

In this embodiment, the needle body 1 adopts a multi-stage nested telescopic structure, and comprises a core fixing tube, a middle telescopic tube group and an outer protective sleeve from inside to outside. The core fixing tube is made of medical grade 316L stainless steel, the inner diameter is constant, the core fixing tube is used for fixing the main drainage channel 2 and ensuring the stability and the sealing performance of the main drainage channel 2, the middle-layer telescopic tube group consists of 3-5 sections of thin-wall titanium alloy tubes with different diameters, and adjacent tube sections are connected through precise threads or a nested chute structure and can axially slide and stretch along the needle body 1. Each section of telescopic pipe is provided with a positioning clamping groove, when the telescopic pipe is stretched to a target position, the clamping grooves are matched with clamping protrusions on the inner wall of the outer layer protective sleeve to realize fixation, and the outer layer protective sleeve is made of polyether-ether-ketone material and has high strength and biocompatibility. The inner wall of the protective sleeve is provided with scale marks, the diameter values (such as 2.0mm, 2.5mm, 3.0mm and the like) of the needle body 1 under different telescopic states are corresponding, and the outer wall is provided with anti-skid textures, so that the operation of medical staff is convenient.

Specifically, in order to realize convenient adjustment of the diameter of the needle body 1, a rotary adjusting knob is arranged at the tail part of the needle body 1 and is connected with a middle-layer telescopic tube group through an internal gear transmission mechanism, when the knob is rotated clockwise, a gear drives a telescopic tube to sequentially extend, the diameter of the needle body 1 is increased, and when the knob is rotated anticlockwise, the telescopic tube is retracted, and the diameter is reduced. The knob is provided with a locking device which can be locked by one key after being adjusted to the target diameter, so as to prevent the diameter of the needle body 1 from being accidentally changed during operation.

In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the invention.

Claims

1. An anti-reflux multichannel puncture drainage needle, comprising:

The needle body (1), the main drainage channel (2), the flushing channel (3), the medicine filling channel (4) and the anti-backflow component;

The main drainage channel (2) is coaxially arranged in the needle body (1) and extends along the length direction of the needle body (1) for sucking tissue fluid at a pathological position;

The flushing channel (3) and the medicine pouring channel (4) are arranged in the main drainage channel (2) and extend along the length direction of the main drainage channel (2), and the flushing channel (3) is used for conveying cleaning liquid to flush and clean pathological positions;

the anti-reflux component is arranged on the main drainage channel (2) so as to prevent the tissue fluid from flowing backwards.

2. The anti-reflux multichannel puncture drainage needle of claim 1, wherein,

The main drainage channel (2) is provided with a main drainage port (21) and a side drainage hole group;

The main drainage port (21) is positioned at the tip of the needle body (1), the side drainage hole group is arranged on the inclined surface of the needle body (1), and the distance from the side drainage hole group to the tip is 4-5 mm.

3. The anti-reflux multichannel puncture drainage needle of claim 2, wherein,

The side drainage hole group comprises a plurality of side suction holes (22);

the side suction holes (22) are arranged in the needle body (1) along the circumferential direction of the needle body (1), and the included angle between the direction of the side suction holes (22) and the axis of the needle body (1) is 25-30 degrees.

4. The anti-reflux multichannel puncture drainage needle of claim 2, wherein,

The flushing channel (3) is provided with a plurality of flushing pipes (31);

The inlet of the flushing pipe (31) is communicated with the flushing channel (3), and the outlet of the flushing pipe (31) is positioned on the inclined plane of the needle point and is 2-3 mm away from the side drainage hole group;

The included angle between the outlet direction of the flushing pipe (31) and the axis of the needle body (1) is 20-25 degrees.

5. The anti-reflux multichannel puncture drainage needle of claim 1, wherein,

The cross sections of the main drainage channel (2), the flushing channel (3) and the medicine filling channel (4) are all round;

The diameter ratio of the main drainage channel (2), the flushing channel (3) and the drug infusion channel (4) is 5:2:1.

6. The anti-reflux multichannel puncture drainage needle of claim 1, wherein,

The anti-reflux assembly includes a first valve and a second valve;

the first valve is arranged at the middle section of the main drainage channel (2), and the second valve is arranged at the outlet of the tail end of the main drainage channel (2).

7. The anti-reflux multichannel puncture drainage needle of claim 6, wherein,

The first valve comprises umbrella-shaped valve leaves (51), a guide rod (52), an umbrella rib assembly and a spring (53);

The guide rod (52) is arranged in the main drainage channel (2) along the axial direction of the main drainage channel (2), the middle part of the umbrella-shaped valve leaf (51) is slidably arranged on the guide rod (52) through an umbrella rib component, the umbrella-shaped valve leaf (51) is fixedly connected to the guide rod (52) through the umbrella rib component, the spring (53) is sleeved on the guide rod (52), one end of the spring (53) is abutted to the end part of the guide rod (52), and the other end of the spring (53) is abutted to the umbrella-shaped valve leaf (51) of the guide rod (52);

when the main drainage channel (2) is used for drainage, negative pressure is generated to drive the middle part of the umbrella-shaped valve leaf (51) to slide along the guide rod (52) to compress the spring (53), and the umbrella-shaped valve leaf (51) realizes closing and conducting the main drainage channel (2) under the action of the umbrella rib component.

8. The anti-reflux multichannel puncture drainage needle of claim 7, wherein,

The umbrella rib component comprises a fixed ring (54), a sliding ring (55), a plurality of supporting rods (56) and a plurality of connecting rods (57);

The sliding ring (55) is slidably sleeved on the guide rod (52), the fixing ring (54) is fixedly arranged on the guide rod (52), the sliding ring (55) is closer to the tail of the needle body (1) than the fixing ring (54), the plurality of supporting rods (56) are uniformly arranged on the umbrella-shaped valve blades (51) along the circumferential direction, one ends of the supporting rods (56) are rotatably connected with the sliding ring (55), one ends of the plurality of connecting rods (57) are connected with the plurality of supporting rods (56) in a one-to-one correspondence manner, and the other ends of the plurality of connecting rods (57) are rotatably connected with the fixing ring (54).

9. The anti-reflux multichannel puncture drainage needle of claim 6, wherein,

The second valve comprises an elastic flap (61) and a sealing ring (62);

The elastic flap (61) is rotatably arranged at the sealing ring (62) and is used for selectively closing the main drainage channel (2), and the elastic flap (61) can be abutted against the sealing ring (62) when closing the outlet of the main drainage channel (2);

the negative pressure generated during drainage of the main drainage channel (2) can drive the elastic valve sheet (61) to rotate in a vertical plane to conduct the outlet of the main drainage channel (2).

10. The anti-reflux multichannel puncture drainage needle of claim 9, wherein,

The elastic flap (61) is provided with an anticoagulant coating;

The ratio of the thickness of the anticoagulant coating to the thickness of the elastic flap (61) is 1:1000-1:5000.