CN219461334U - Multifunctional internal fistula puncture needle for dialysis - Google Patents

Abstract

The utility model provides a multifunctional internal fistula puncture needle for dialysis, which comprises a needle tube, a puncture needle body, a connecting assembly, an isobaric device and a switch piece, wherein the puncture needle body is arranged on the distal end of the needle tube and is communicated with the needle tube; the connecting component is arranged on the proximal end of the needle tube and can seal or open the proximal tube orifice of the needle tube, and is used for being connected with a blood tube of dialysis equipment; the isobaric device is arranged on the needle tube and communicated with the position between the two ends of the needle tube, can block liquid from passing through and allow gas to pass through, and is internally provided with an anti-pollution interlayer; the switch piece is arranged between the isobaric device and the needle tube and is used for controlling the communication position between the isobaric device and the needle tube to be opened or closed. The utility model can help accurately judge whether puncture is successful, can avoid negative pressure suction of blood vessels, protect functions of internal fistula blood vessels, can reduce standby materials, can simplify preparation steps, can realize single operation, and does not need an assistant to suck back the injector.

Description

Multifunctional internal fistula puncture needle for dialysis

Technical Field

The utility model relates to the field of blood purification medical instruments, in particular to a multifunctional internal fistula puncture needle for dialysis.

Background

Arteriovenous fistulae are vascular access for hemodialysis by hemodialysis patients, and are of importance corresponding to the life line of the patient, so that maintenance of arteriovenous fistulae of the patient is very important.

An internal fistula puncture needle for dialysis is a puncture needle for establishing a vascular access when an arteriovenous internal fistula patient is permeated with blood, and a 16G or 17G puncture needle is conventionally used. If puncture fails, internal fistula blood vessels are easily damaged, and the internal arteriovenous fistula function of a patient is lost.

During dialysis treatment, a dialysis blood tube arranged on the dialysis machine is connected with an internal fistula puncture needle, power is generated through a blood pump on the dialysis machine, blood in a patient is drained, the blood is filled into a tube cavity, dialysis treatment is carried out, a bag of physiological saline is connected to the blood tube after dialysis is finished, power is generated through the blood pump on the dialysis machine, the blood in a pipeline is flushed by the physiological saline, the patient is returned, and the blood tube is separated from the internal fistula puncture needle after the back transfusion is finished.

Currently, dialysis treatment mainly comprises the following operative steps:

1. a puncture point is selected. The nurses often judge the puncture experience of the blood vessel of the intravenous fistula and the puncture plan which is designed originally.

2. And (5) arteriovenous fistula puncture and blood sample collection. An arteriovenous fistula puncture needle of 16 or 17 gauge is prepared, a 10ml empty syringe is connected with the empty puncture needle (the empty needle is used for blood drawing when special test specimens such as the coagulation function of a patient are collected) or a 10ml syringe is connected with the puncture needle for prefilling physiological saline (when blood specimens are not required to be collected or blood specimens are not required to be collected), and skin is punctured into a blood vessel from a selected puncture point. When blood flows into the puncture needle lumen, or blood can be withdrawn and pushed back clear using an empty syringe (or a syringe that aspirates normal saline), it can be determined that the needle tip is located within the internal fistula.

3. Dialysis is started. The cap of the puncture needle for arteriovenous fistula is separated and discarded, the dialysis blood tube filled with normal saline is connected, and the blood in the patient is led out by the power of the blood pump of the dialysis machine, so that the whole blood tube and the dialyzer are filled. Parameters are adjusted and the machine operates normally.

4. And (5) ending the dialysis. When the dialysis treatment time is over, a bag of normal saline is connected to the blood path tube, power is generated by the blood pump on the dialysis machine, the normal saline is adopted to flush the blood in the pipeline, the blood in the blood path tube is returned to the patient, and when the blood in the blood path tube is flushed to be light red, the blood pump is stopped, and the return is completed. The blood vessel is separated from the arteriovenous fistula puncture needle. The end lumen of the puncture needle is closed by a screw cap, the puncture needle is pulled out, and the blood vessel is discarded.

However, current dialysis treatments have the following problems:

1. the operation precursors are more. Preparing a 5ml syringe and physiological saline, and sucking the physiological saline into the syringe for standby; if special blood sample is needed, another syringe and blood collection tube are needed.

2. It is difficult to determine whether the puncture needle enters a blood vessel during puncture. When puncturing, even if the puncture needle has successfully penetrated into a blood vessel, if the blood vessel pressure is small, timely blood return cannot be formed, and the judgment of the operator on the success or failure of puncturing can be affected. The main ways of solving the above problems currently are two, first: opening the sealing nut of the internal fistula needle to enable the pressure in the needle to be communicated with the atmospheric pressure so as to be beneficial to the outflow of blood, but the mode enables the lumen to be directly communicated with the outside, so that the risk of pollution exists; secondly, the assisting person uses the prepared syringe containing normal saline to connect the lumen and performs suction, and if the blood can be sucked out and the back pushing is smooth, the puncture needle is positioned in the blood vessel lumen, and the puncture is successful. However, the negative pressure suction method is easy to cause damage to the inner wall of the blood vessel and affects the function of internal fistula of the patient.

3. There is a risk of hospital feel in the separation operation at the end of dialysis. When the treatment is finished, the puncture needle is required to be separated from the blood vessel, and then the prepared screw cap is screwed to the tail end of the lumen, so that the operation of screwing the screw cap is easy to overflow blood because the lumen is still full of blood, and a nurse is easy to be infected with the overflowed blood, so that the infection risk exists.

4. The process of collecting special blood specimens (such as blood specimens of blood coagulation function and the like) by the common internal fistula puncture needle is complex, the risks of infection and needle puncture injury exist, and blood collection can be carried out after internal fistula puncture before hemodialysis treatment in order to reduce the pain of patients caused by repeated puncture at ordinary times. In the first method, the syringe is used for drawing blood, after the puncture of the internal fistula needle is successful, the needle head of the syringe is separated, the syringe is connected with the tail end of the internal fistula needle, the syringe is withdrawn to draw the required blood, then the syringe and the internal fistula needle are separated, and the syringe is connected back to the needle head to inject the blood into the blood collection tube. In the second method, after the puncture of the internal fistula needle is successful, the arterial end of the blood vessel is connected with the internal fistula needle, then the blood is extracted from a blood sampling port at the position of about 60cm in front of the blood vessel by using a syringe or a blood sampling needle, the syringe is separated from the blood vessel after the extraction is completed, and then the blood is injected into the blood sampling tube. However, the blood sampling position is far away from the blood outflow distance, and after the blood is pre-filled with physiological saline, the blood is not suitable for collecting special blood samples (such as blood coagulation functional blood samples) after the physiological saline is mixed into the blood, so that the accuracy of the test samples can be influenced, and meanwhile, the process is complicated and risks exist.

5. The temperature of the blood returned to the patient cannot be accurately grasped. During dialysis, the temperature of blood returned to the patient is preferably 35-37 ℃, and too low a blood temperature can lead to the rise of blood pressure and discomfort of the patient caused by cold fibrillation or vasoconstriction of the patient. During dialysis, the temperature of the dialysate is regulated in the machine according to the doctor's advice to influence the temperature of the blood in the extracorporeal circulation of the patient, but in winter and spring, the indoor temperature is lower, heat dissipation inevitably occurs when the blood passes through a lengthy pipeline, the temperature displayed on the equipment is not equivalent to the actual temperature of the blood entering the patient, and no other method accurately reflects the actual temperature of the blood entering the patient at present.

Therefore, it is necessary to provide a multifunctional internal fistula puncture needle for dialysis to help an operator to judge whether puncture is successful or not in time, reduce the number of preparations and simplify the preparation steps, and to avoid suction of blood vessels under negative pressure, and to protect the function of internal fistula blood vessels.

Disclosure of Invention

The utility model aims to provide a multifunctional internal fistula puncture needle for dialysis, which is used for helping operators judge whether puncture is successful or not in time, reducing standby materials and simplifying preparation steps, avoiding negative pressure sucking blood vessels and protecting internal fistula blood vessel functions.

In order to achieve the above purpose, the utility model provides a multifunctional internal fistula puncture needle for dialysis, which comprises a needle tube, a puncture needle body, a connecting component, an isobaric device and a switch piece, wherein the puncture needle body is arranged on the distal end of the needle tube and is communicated with the needle tube; the connecting component is arranged on the proximal end of the needle tube and can seal or open the proximal tube orifice of the needle tube, and is used for being connected with a blood tube of dialysis equipment; the isobaric device is arranged on the needle tube and communicated with the position between the two ends of the needle tube, can block liquid from passing through and allow gas to pass through, and is internally provided with an anti-pollution interlayer; the switch piece is arranged between the isobaric device and the needle tube and is used for controlling the communication position between the isobaric device and the needle tube to be opened or closed.

Preferably, the needle tube further comprises a needle wing, wherein the needle wing is arranged on the needle tube and is positioned between the puncture needle body and the isobaric device.

Preferably, the needle wing is rotatably and retractably arranged on the needle tube.

Preferably, the outer periphery of the needle tube is provided with a thermosensitive coating, and the thermosensitive coating is positioned between the puncture needle body and the isobaric device.

Preferably, the blood collection device further comprises a blood collection connecting piece, wherein the blood collection connecting piece is arranged on the needle tube and located between the isobaric device and the connecting assembly, and the blood collection connecting piece is used for allowing a blood collection needle to puncture and be inserted into the needle tube.

Preferably, the needle tube is provided with a thickened hardening layer at a position opposite to the blood sampling connecting piece.

Preferably, the catheter clip is arranged on the needle tube and is positioned between the isobaric device and the connecting assembly, and the catheter clip is used for opening or clamping the lumen of the needle tube.

Preferably, the device further comprises a negative pressure device and a three-way switch, wherein the three-way switch is connected between the needle tube and the negative pressure device, and is positioned between the isobaric device and the connecting component along the proximal and distal direction of the needle tube, and the three-way switch is used for controlling a cavity positioned at the distal end side of the three-way switch in the needle tube and a cavity positioned at the proximal end side of the three-way switch to form a passage, or controlling a cavity positioned at the proximal end side of the three-way switch to form a passage with the vacuum device.

Preferably, the connecting assembly comprises a connecting member body and a connecting cap, wherein one end of the connecting member body is arranged on the proximal end of the needle tube and is communicated with the needle tube, the connecting cap is detachably connected with the connecting member body, and the connecting cap is used for sealing the other end of the connecting member body.

Preferably, the puncture needle also comprises a needle cap, and the needle cap is sleeved on the puncture needle body.

Compared with the prior art, the multifunctional internal fistula puncture needle for dialysis has the advantages that the isobaric device and the switch piece are arranged on the needle tube, before puncture, the switch piece is in the closed state, and when puncture is carried out, the switch piece is opened, so that the communication part between the isobaric device and the needle tube is opened, the lumen of the needle tube is isobaric outside, blood flows out in time after the puncture needle body penetrates into a target blood vessel, the success of puncture is helped, the isobaric device can block liquid to pass and allow gas to pass, the blood can be prevented from flowing out through the isobaric device, negative pressure suction of blood vessels is avoided, the internal fistula blood vessel functions are protected, simultaneously, standby materials such as an injector, normal saline and the like can be reduced, the preparation steps can be simplified, if the injector and the suction of the normal saline are not needed, the operation by a person can be realized, and the injector is not needed to be drawn back by an assistant.

Drawings

Fig. 1 is a schematic view of a multifunctional internal fistula puncture needle for dialysis according to the present utility model.

Fig. 2 is a block diagram of an isobaric device of the dialysis multifunctional internal fistula puncture needle of the present utility model.

Fig. 3 is a view showing the internal blood flow structure of the dialysis multifunctional internal fistula puncture needle of the present utility model at the beginning.

Fig. 4 is a view showing the internal blood flow structure of the multifunctional internal fistula puncture needle for dialysis according to the present utility model after completion of dialysis.

Fig. 5 is a structural view of a blood collection connector of the dialysis multifunctional fistula puncture needle of the present utility model when a blood collection needle is pierced.

Detailed Description

In order to describe the technical content and constructional features of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.

Referring to fig. 1 and 2, a dialysis multifunctional internal fistula puncture needle 100 of the present utility model comprises a needle tube 1, a puncture needle body 2, a connecting component 3, an isobaric device 4 and a switch member 41, wherein the puncture needle body 2 is arranged on the distal end of the needle tube 1, and the puncture needle body 2 is communicated with the needle tube 1; the connecting component 3 is arranged on the proximal end of the needle tube 1 and can seal or open the proximal tube orifice of the needle tube 1, and the connecting component 3 is used for connecting with a blood tube of dialysis equipment; the isobaric device 4 is arranged on the needle tube 1 and communicated with the position between the two ends of the needle tube 1, the isobaric device 4 can block liquid from passing through and allow gas to pass through, and an anti-pollution interlayer is arranged in the isobaric device 4; a switch 41 is provided between the isobaric means 4 and the needle cannula 1 and is used to control the opening or closing of the communication between the isobaric means 4 and the needle cannula 1. Specifically, the needle tube 1 may be a hollow hose made of polycarbonate, which has a length of 30cm and a cavity inner diameter of 7mm, but is not limited thereto. The isobaric device 4 may be an existing water-blocking air filter, but not limited thereto, and may be an automatic exhaust valve, for example.

Referring to fig. 1, in the present embodiment, the multifunctional internal fistula puncture needle 100 for dialysis further comprises a needle wing 5, wherein the needle wing 5 is disposed on the needle tube 1 and located between the puncture needle body 2 and the isobaric device 4. By providing the wings 5, the operator can easily hold the device. Further, the needle wing 5 is rotatably and retractably arranged on the needle tube 1. The needle wing 5 is driven to rotate and unfold relative to the needle tube 1, so that an operator can hold the multifunctional internal fistula puncture needle conveniently, and the needle wing 5 is driven to rotate and fold relative to the needle tube 1, so that the multifunctional internal fistula puncture needle can be stored conveniently when the multifunctional internal fistula puncture needle is not used.

With continued reference to fig. 1, in this embodiment, the outer circumference of the needle cannula 1 is provided with a heat sensitive coating 11, and the heat sensitive coating 11 is located between the needle body 2 and the isobaric device 4. The heat-sensitive coating 11 is disposed as close to the puncture needle body 2 as possible to reflect the temperature of blood entering the human body most accurately, for example, but not limited to, the heat-sensitive coating 11 may be disposed at a distance of 1cm from the needle wing 5 in the distal direction. Specifically, the length of the thermosensitive coating 11 is about 2cm, and a thermosensitive color-changing material is used, so that the temperature is blue when the temperature of blood in the lumen of the needle tube 1 is lower than 35 ℃, the temperature is too low, the temperature is colorless when the temperature is 35-37 ℃, and the temperature is suitable, but the thermosensitive color-changing material is not limited to the above. The materials and principles of the thermochromic material belong to common general knowledge in the industry, and are not described in detail herein.

Referring to fig. 1 and 5, in the present embodiment, the multifunctional internal fistula puncture needle 100 for dialysis further includes a blood sampling connector 6, wherein the blood sampling connector 6 is disposed on the needle tube 1 and located between the isobaric device 4 and the connecting assembly 3, and the blood sampling connector 6 is used for the blood sampling needle 200 to puncture and insert into the needle tube 1. Wherein, the outer layer of the blood sampling connecting piece 6 can be circular plastic material, the inside is medical soft rubber material, during blood sampling, one end of the blood sampling needle 200 can be directly used for puncturing and sampling blood, and the other end of the blood sampling needle 200 is connected with a blood sampling tube, so that the use of an injector is reduced, the puncture of the needle and the infection are avoided, but the material of the blood sampling connecting piece 6 is not limited to this, for example, the blood sampling connecting piece 6 can also be made of medical soft rubber material. Further, the needle tube 1 is provided with a thickened hardened layer 12 at a position facing away from the blood sampling connecting piece 6, so that the blood sampling needle 200 is prevented from piercing the tube body of the needle tube 1 during blood sampling.

Referring to fig. 1, in this embodiment, the multifunctional internal fistula puncture needle 100 for dialysis of the present utility model further comprises a tube clamp 7, wherein the tube clamp 7 is disposed on the needle tube 1 and between the isobaric device 4 and the connecting assembly 3, and the tube clamp 7 is used for opening or clamping the lumen of the needle tube 1. The clamp 7 is initially open and when the clamp 7 is closed, the clamp 7 clamps the lumen of the needle cannula 1, thereby preventing fluid flow within the lumen of the needle cannula 1. The pipe clamp 7 may be made of polypropylene, but is not limited thereto.

With continued reference to fig. 1, in this embodiment, the dialysis multifunctional fistula puncture needle 100 of the present utility model further comprises a negative pressure device 8 and a three-way switch 81, wherein the three-way switch 81 is connected between the needle tube 1 and the negative pressure device 8, and the three-way switch 81 is located between the isobaric device 4 and the connecting assembly 3 along the proximal-distal direction of the needle tube 1, and the three-way switch 81 is used for controlling the lumen of the needle tube 1 located on the distal side of the three-way switch 81 to form a passage with the lumen located on the proximal side of the three-way switch 81, or controlling the lumen of the three-way switch 81 located on the proximal side to form a passage with the vacuum device. As shown in fig. 3, arrow AB represents the direction of blood flow at the beginning, and at the beginning, three-way switch 81 controls the lumen of needle tube 1 on the distal side of three-way switch 81 to form a passage with the lumen on the proximal side of three-way switch 81, so that the blood flow in the tube is not affected. As shown in fig. 4, arrow C in the drawing indicates the blood flow direction after the completion of the dialysis, before separating the dialysis multifunction fistula puncture needle 100 of the present utility model from the blood vessel, the three-way switch 81 is rotated to form a passage between the lumen on the proximal end side of the three-way switch 81 and the vacuum device, so that the blood in the lumen of the residual needle tube 1 is sucked into the negative pressure device 8 under the negative pressure of the negative pressure device 8, and the blood is prevented from overflowing and being contaminated. The negative pressure device 8 may be a 2ml vacuum bottle, but is not limited thereto.

Referring to fig. 1 again, in the present embodiment, the connecting assembly 3 includes a connecting member body 31 and a connecting cap 32, one end of the connecting member body 31 is disposed on the proximal end of the needle cannula 1 and is in communication with the needle cannula 1, the connecting cap 32 is detachably connected to the connecting member body 31, and the connecting cap 32 is used for plugging the other end of the connecting member body 31. During dialysis, the connection cap 32 is removed so that the connector body 31 can be connected with the blood vessel of the dialysis apparatus. After the dialysis is completed, the connector body 31 is separated from the blood vessel of the dialysis apparatus, and the connector cap 32 is reattached to the connector body 31 and the other end of the connector body 31 is plugged, thereby plugging the proximal nozzle of the needle tube 1. The connection member body 31 and the connection cap 32 may be connected by a threaded connection, but not limited thereto.

With continued reference to fig. 1, the dialysis multifunctional internal fistula puncture needle 100 of the utility model further comprises a needle cap 9, and the needle cap 9 is sleeved on the puncture needle body 2. The needle cap 9 is used for protecting, and the needle cap 9 can be detached from the puncture needle body 2 so as to facilitate the puncture of the puncture needle body 2.

Referring to fig. 1 again, in the present embodiment, the heat sensitive coating 11 is located at 1cm from the needle wing 5 in the distal direction, the isobaric device 4 is located at 5cm from the needle wing 5 in the distal direction, the blood sampling component is located at 10cm from the needle wing 5 in the distal direction, the pipe clamp 7 is located at 20cm from the needle wing 5 in the distal direction, and the negative pressure device 8 is located at 25cm from the needle wing 5 in the distal direction, but not limited thereto.

Referring to fig. 1 to 5, the dialysis multifunctional internal fistula puncture needle 100 of the present utility model comprises the following specific operation steps:

s1, opening the package, and checking the integrity of the multifunctional internal fistula puncture needle 100 for dialysis.

S2, opening the isobaric device 4 to enable the multifunctional internal fistula puncture needle 100 for dialysis to be equal to the external pressure, wherein the multifunctional internal fistula puncture needle 100 for dialysis cannot be polluted due to the fact that an anti-pollution interlayer is arranged in the isobaric device 4.

S3, removing the needle cap, selecting a skin puncture point to puncture, and when blood flows out of the needle tube 1 during puncturing into a blood vessel, indicating that the puncture needle is successful, and closing the isobaric device 4 at the moment.

S4, when a blood sample needs to be collected, the double-head blood taking needle 200 can be used for penetrating the blood taking connecting piece 6 to take blood, after a sufficient amount of blood sample is collected, the blood taking needle 200 is pulled out, the blood taking needle 200 is directly discarded into the sharp instrument box, the intermediate steps are reduced, and the risk of needle puncture is prevented.

S5, the connecting cap 32 is detached, and the connecting piece body 31 is connected with the blood path tube of the dialysis equipment.

S6, in the dialysis process, whether the blood temperature is proper or not is observed through the thermosensitive coating 11, and if the blood temperature is lower than the ideal temperature, the temperature of the dialysate of the dialysis equipment is regulated.

S7, after the dialysis is finished, the tube clamp 7 on the needle tube 1 is closed, the three-way switch 81 is turned on, a passage is formed between the lumen on one side of the proximal end of the three-way switch 81 and the vacuum device, and negative pressure is formed in the lumen, so that blood in the lumen of the residual needle tube 1 is sucked into the negative pressure device 8 under the negative pressure effect of the negative pressure device 8, the blood is ensured to be sucked into the negative pressure device 8 when the multifunctional internal fistula puncture needle 100 for dialysis and the blood path tube are separated, the connecting cap 32 is reconnected to the connecting piece body 31, the other end of the connecting piece body 31 is plugged, the proximal end orifice of the needle tube 1 is plugged, and blood pollution is reduced.

In summary, the multifunctional internal fistula puncture needle 100 for dialysis according to the present utility model is provided with the isobaric device 4 and the switch member 41 on the needle tube 1, before puncture, the switch member 41 is in a closed state, and when puncture is performed, the switch member 41 is opened, so that the communication between the isobaric device 4 and the needle tube 1 is opened, the lumen of the needle tube 1 is isobarically positioned in the outside, so that blood flows out in time after the puncture needle body 2 punctures a target blood vessel, thereby helping to accurately judge whether puncture is successful, and since the isobaric device 4 can block liquid to allow gas to pass through, blood can be prevented from flowing out through the isobaric device 4, negative pressure suction of blood vessels can be avoided, internal fistula blood vessel functions can be protected, and simultaneously, standby materials such as an injector, normal saline and the like can be reduced, preparation steps can be simplified, for example, an injector and suction of normal saline are not required, single person operation can be realized, and an assistant is not required to suck back the injector; can avoid negative pressure sucking blood vessel and damage to internal fistula blood vessel function. Secondly, the dialysis multifunctional internal fistula puncture needle 100 of the utility model can simplify the blood sampling operation steps, can directly use the blood taking needle 200 to puncture and take blood, reduces the use of a syringe and a blood taking tube, and avoids needle puncture and infection. In addition, the multifunctional internal fistula puncture needle 100 for dialysis of the utility model can feed back the blood temperature in real time, reduce the occurrence of adverse reaction and improve the dialysis treatment quality. Further, the multifunctional internal fistula puncture needle 100 for dialysis of the present utility model can prevent blood from overflowing when separated from the blood vessel of the dialysis apparatus, and reduce the risk of staining the nurse with blood and needle stick injuries.

The foregoing disclosure is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims (10)

1. The multifunctional internal fistula puncture needle for dialysis is characterized by comprising a needle tube, a puncture needle body, a connecting assembly, an isobaric device and a switch piece, wherein the puncture needle body is arranged on the distal end of the needle tube and is communicated with the needle tube; the connecting component is arranged on the proximal end of the needle tube and can seal or open the proximal tube orifice of the needle tube, and is used for being connected with a blood tube of dialysis equipment; the isobaric device is arranged on the needle tube and communicated with the position between the two ends of the needle tube, can block liquid from passing through and allow gas to pass through, and is internally provided with an anti-pollution interlayer; the switch piece is arranged between the isobaric device and the needle tube and is used for controlling the communication position between the isobaric device and the needle tube to be opened or closed.

2. The dialysis multi-functional internal fistula puncture needle of claim 1, further comprising a needle wing disposed on the needle cannula and between the puncture needle body and the isobaric device.

3. The multifunctional internal fistula puncture needle for dialysis of claim 2, wherein the needle wings are rotatably and foldably arranged on the needle tube.

4. The dialysis multi-functional internal fistula puncture needle of claim 1, wherein a thermally sensitive coating is disposed on an outer periphery of the needle cannula, the thermally sensitive coating being positioned between the puncture needle body and the isobaric device.

5. The dialysis multi-functional internal fistula adapter of claim 1, further comprising a blood collection connector disposed on the needle cannula and between the isobaric device and the connecting assembly, the blood collection connector being configured for penetration by a blood collection needle and insertion into the needle cannula.

6. The multifunctional internal fistula puncture needle for dialysis of claim 5, wherein the needle tube is provided with a thickened stiffening layer at a position facing away from the blood collection connector.

7. The dialysis multi-functional internal fistula adapter of claim 1, further comprising a tube clip disposed on the needle cannula and between the isobaric device and the connecting assembly, the tube clip for opening or clipping a lumen of the needle cannula.

8. The multifunctional internal fistula puncture needle for dialysis according to claim 1, further comprising a negative pressure device and a three-way switch, wherein the three-way switch is connected between the needle tube and the negative pressure device, and is positioned between the isobaric device and the connecting assembly along the proximal and distal direction of the needle tube, and the three-way switch is used for controlling a lumen positioned on the distal side of the three-way switch in the needle tube to form a passage with a lumen positioned on the proximal side of the three-way switch, or controlling a lumen positioned on the proximal side of the three-way switch to form a passage with a vacuum device.

9. The multifunctional internal fistula puncture needle for dialysis of claim 1, wherein the connecting assembly comprises a connecting member body and a connecting cap, wherein one end of the connecting member body is arranged on the proximal end of the needle tube and is communicated with the needle tube, the connecting cap is detachably connected with the connecting member body, and the connecting cap is used for sealing off the other end of the connecting member body.

10. The dialysis multi-functional internal fistula puncture needle of claim 1, further comprising a needle cap that is sleeved over the puncture needle body.