A novel fluid extraction device for oncology treatment and its extraction method

Abstract

The present invention discloses a novel effusion extraction device for oncology treatment and its extraction method, which relates to the technical field of effusion extraction. It includes a sleeve with a barrel cavity for accommodating a syringe. One end of the sleeve is provided with a first extension hole for the needle tip to protrude, and the other end is open for the needle handle and its end cap to protrude. The sleeve is provided with a pumping mechanism, including a pressing part and a transmission part. The pressing part is arranged outside the barrel wall of the sleeve, and the transmission part is arranged inside the barrel wall of the sleeve. The present invention improves the problems in the prior art that when performing effusion extraction and needle insertion, during the operation of retracting and inserting the needle simultaneously, the operator generally operates with both hands, and the other hand repeatedly retracts the needle handle, making it difficult to control the center of gravity and the needle insertion not stable enough. The present invention has the advantages that the operator can insert the needle with one hand and simultaneously control the repeated retraction of the needle handle with the other hand, and the other hand can be placed on the puncture site, making the operation more convenient and the needle insertion more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid extraction, and particularly to a novel fluid extraction device and an extraction method for oncology treatment. Background Art

[0002] A tumor refers to a new growth formed by the proliferation of local tissue cells under the action of various tumorigenic factors in the human body. Both primary or metastatic tumors can cause excessive production of pleural fluid, resulting in the symptom of pleural effusion. When the pleural effusion exceeds the normal state, it will cause symptoms such as shortness of breath and chest tightness in the human body. Therefore, it is necessary to extract the pleural effusion and detect the pleural effusion.

[0003] In the prior art, when extracting pleural effusion, generally, an operator inserts a needle into the human body through a syringe, and then slowly inserts it so that the needle enters the fluid accumulation area. Then, the fluid is extracted through the syringe. In actual operation, for safer operation, after inserting the needle of the syringe into the skin, it is necessary to perform the operation of withdrawing while advancing the needle. During the process of advancing the needle, maintaining the action of withdrawing can help determine whether the needle has entered a blood vessel. If fresh blood is drawn, it indicates that the needle may have penetrated into a blood vessel, and the needle should be slightly withdrawn and the direction should be changed and tried again to avoid continuously advancing the needle and piercing the blood vessel. In addition, through the operation of withdrawing while advancing the needle, after the needle enters the interior of the chest cavity and enters the fluid accumulation, due to the operation of withdrawing, the fluid can enter the syringe barrel, and the operator can discover it in time, and then stop advancing the needle to avoid continuously advancing the needle and going deeper into the human body, which is likely to penetrate the pleural cavity and damage other organs.

[0004] In the operation of withdrawing while advancing the needle, generally, an operator holds the syringe barrel with one hand, and the other hand needs to hold the needle handle to perform the operation of withdrawing while advancing the needle. Since the operator operates with both hands and the other hand repeatedly twitches the needle handle, the center of gravity is not easy to control, and the syringe barrel is prone to shaking. Relatively speaking, when holding the syringe barrel with one hand and pressing the other hand on the puncture site of the human body, when advancing the needle, the operator is more convenient to control the slow process of advancing the needle, and the operation of advancing the needle is more stable. Therefore, a fluid extraction device is needed that enables the operator to hold the syringe barrel with one hand to advance the needle and at the same time control the repeated withdrawal of the needle handle with one hand.

[0005] In view of the above technical problems, the present invention discloses a novel fluid extraction device and an extraction method for oncology treatment. The present invention has the advantages that when extracting pleural effusion through a syringe, after the syringe needle is inserted into the human body, it is convenient for the operator to perform one-handed needle advancement and at the same time control the repeated withdrawal of the needle handle with one hand, making the operation more convenient and the operation of advancing the needle more stable. Summary of the Invention

[0006] The object of the present invention is to overcome the deficiencies of the prior art and provide a novel effusion extraction device and its extraction method for oncology treatment, so as to solve the technical problems in the prior art that when performing effusion extraction and needle insertion, during the operation of retracting and inserting the needle simultaneously, the operator generally operates with both hands, and the other hand repeatedly twitches the needle handle, resulting in poor center of gravity control and unstable needle insertion. The present invention has the advantages that the operator can perform single-handed needle insertion and single-handed control of the repeated retraction of the needle handle, and the other hand can be placed on the puncture site, making the operation more convenient and more stable during needle insertion.

[0007] The present invention is realized through the following technical solutions: The present invention discloses a novel effusion extraction device for oncology treatment, including a sleeve with a barrel cavity for accommodating a syringe. One end of the sleeve is provided with an extension hole one for the needle to protrude, and the other end is open for the needle handle and its end cap to protrude.

[0008] The sleeve is provided with a twitching mechanism, including a pressing part and a transmission part;

[0009] The pressing part is arranged outside the barrel wall of the sleeve,

[0010] The transmission part is arranged inside the barrel wall of the sleeve, including a lower pressing block that penetrates the barrel wall and is connected to the pressing part. The bottom end of the lower pressing block abuts against an extrusion block, and is used to push the ejector rod connected to the extrusion block to move along the length direction of the sleeve, and then push the end cap of the syringe.

[0011] Further, the sleeve is composed of an upper half sleeve and a lower half sleeve.

[0012] Further, the splicing surface of the upper half sleeve and the lower half sleeve is provided with a positioning component, including several groups of matching positioning columns and positioning holes.

[0013] Further, the open end of the sleeve is constricted to form an extension hole two that can expose the needle handle and its end cap of the syringe.

[0014] Further, the pressing part is arc-shaped, and the lower pressing blocks are a pair, symmetrically arranged inside the barrel walls on both sides of the sleeve;

[0015] The ejector rods are a pair, respectively linked by the lower pressing blocks through the extrusion blocks.

[0016] Further, sliding grooves are provided at the cross-sections of the barrel walls on both sides of the lower half sleeve, and moving blocks are placed in the sliding grooves. One side of the moving block is fixedly connected to the extrusion block, the end face of the extrusion block is an inclined surface for receiving the thrust of the lower pressing block, and the other side of the moving block is fixedly connected to the ejector rod;

[0017] Inside the sliding groove, a first spring is sleeved on the ejector rod, one end of which abuts against the moving block, and the other end abuts against the inner side wall of the sliding groove.

[0018] Furthermore, an elastic limiting member is provided at the bottom of the pressing portion, including a clearance hole provided in the wall of the sleeve, and the aperture of the clearance hole is set as a limiting hole.

[0019] The limit plate is placed in the clearance hole, and the slide bar connected with the limit plate is connected with the pressing part through the limit hole;

[0020] The slide rod sleeve is provided with a spring 2, the top end of which abuts against the pressing part, and the bottom end of which abuts against the sleeve.

[0021] Furthermore, a clamping assembly is provided inside the sleeve, including an upper clamping sleeve, a lower clamping sleeve, an upper gripping sleeve, and a lower gripping sleeve;

[0022] The upper jacket and the lower jacket are symmetrically arranged on the inner side wall of the sleeve.

[0023] The upper jacket and the lower jacket are respectively connected to the upper gripping sleeve and the lower gripping sleeve on the outer side wall of the sleeve through a connecting rod penetrating the sleeve wall;

[0024] On the outer side wall of the sleeve, the connecting rods are respectively sleeved with springs three.

[0025] Furthermore, a plurality of observation slots are provided at the needle-proximal end of the sleeve;

[0026] The observation groove may be provided with a magnifying glass for observing the connection between the syringe barrel and the needle of the syringe.

[0027] A novel extraction method of a fluid extraction device for oncology treatment comprises the following steps:

[0028] Step 1: The operator places the syringe into the sleeve so that the syringe is located between the upper jacket and the lower jacket, and the needle extends out of the sleeve from the extension hole 1, and the handle cap is located outside the other end of the sleeve, and the handle cap is in contact with the ejector rod;

[0029] Step 2: The operator holds the upper grip sleeve and the lower grip sleeve of the sleeve with one hand, so that the upper grip sleeve and the lower grip sleeve move toward each other and then clamp the syringe;

[0030] Step 3: The operator inserts the needle into the human skin and continues to move the needle forward;

[0031] When the needle handle needs to be withdrawn slightly, the pressing part is pressed down by the thumb to withdraw the syringe slightly, and the liquid in the syringe is observed through the observation slot;

[0032] When the needle enters the blood, stop inserting the needle, change the position and reinsert the needle;

[0033] If the needle enters the effusion, the needle will be stopped and the operator will operate the handle cap to extract the effusion;

[0034] Step 4: After the effusion is extracted, pull out the needle, loosen the upper and lower grips, and pull out the syringe.

[0035] The present invention has the following advantages:

[0036] The present invention provides a syringe, a sleeve and a pumping mechanism, so that when extracting effusion, the operator can hold the sleeve with one hand to insert the needle and control the small-amplitude retraction of the needle handle with one hand, without the need for two-hand operation. When extracting effusion, the other hand can be placed on the puncture site to improve the stability of needle insertion. In addition, through the provision of the pumping mechanism, when performing the retraction operation, the retraction operation can be completed by pressing with the thumb of the hand holding the sleeve, making the retraction operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 It is a schematic diagram of the internal structure of the lower half cylinder of the present invention;

[0039] Figure 3 It is a schematic diagram of the needle handle and piston structure of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the lower half cylinder and the syringe of the present invention;

[0041] Figure 5 It is a schematic diagram of the internal structure of the upper half cylinder of the present invention;

[0042] Figure 6 It is a schematic diagram of the upper half cylinder and the through groove structure of the present invention;

[0043] Figure 7 For the present invention Figure 5 A local enlarged structural schematic diagram;

[0044] Figure 8 For the present invention Figure 2 A schematic diagram of the local enlarged structure at B;

[0045] Figure 9 It is a schematic diagram of the upper half cylinder structure of the present invention;

[0046] Figure 10 It is a partial front cross-sectional structural diagram of the upper half cylinder and the lower half cylinder of the present invention;

[0047] Figure 11 It is a schematic diagram of the upper half cylinder profile structure of the present invention;

[0048] Figure 12 It is a schematic diagram of the sleeve profile measurement structure of the present invention;

[0049] Figure 13 It is a schematic diagram of the operation of the extraction device of the present invention during extraction.

[0050] In the figure: 1, syringe; 2, sleeve; 3, extension hole 1; 4, extension hole 2; 5, pumping mechanism; 6, positioning assembly; 7, through hole; 8, clamping assembly; 9, anti-skid pad; 10, observation slot; 101, syringe; 102, needle handle; 103, handle cap; 104, piston; 105, needle; 201, upper half cylinder; 202, lower half cylinder; 501, pressing part; 502, transmission part; 601, positioning column; 602, positioning hole; 521, through slot; 522 , lower pressure block; 523, slide groove; 524, moving block; 525, extrusion block; 526, push rod; 527, spring one; 511, pressing half ring; 512, elastic limiter; 5121, slide rod; 5122, limit hole; 5123, give way hole; 5124, limit plate; 5125, spring two; 801, upper jacket; 802, lower jacket; 803, upper grip sleeve; 804, lower grip sleeve; 805, connecting rod; 806, perforation; 807, spring three. DETAILED DESCRIPTION

[0051] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given. However, the protection scope of the present invention is not limited to the following embodiments. In the description of the present invention, words indicating directions or positional relationships such as "front", "rear", "left", and "right" are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0052] The embodiment discloses a novel fluid extraction device for oncology treatment, such as Figures 1 - 12 As shown, it includes a syringe 1, such as Figures 1 - 4 As shown, the syringe 1 specifically includes a syringe 101, a needle handle 102, a piston 104 and a needle 105. The syringe 101 is provided with a piston 104 for sliding insertion, and one end of the piston 104 is provided with a needle handle 102, and the other end of the needle handle 102 extends to the outside of the syringe 101, and the other end of the needle handle 102 is fixedly provided with a handle cap 103, and the other end of the syringe 101 is fixedly provided with a needle 105, and the needle 105 is connected to the inside of the syringe 101. During operation, the operator holds the syringe 101 and moves the syringe 101 so that the needle 105 can be inserted into the human body, and then the needle handle 102 is pulled out by the finger buckle of the handle cap 103, thereby generating negative pressure inside the syringe 101 to draw out the pleural effusion.

[0053] However, in actual operation, when the operator inserts the needle 105 into the human body, after the needle 105 is inserted into the skin, it is necessary to perform the operation of withdrawing the needle while inserting the needle. During the needle insertion process, keeping the withdrawal action can help determine whether the needle 105 has entered the blood vessel. And through the withdrawal operation, the effusion can enter the syringe 101, and the operator can find it in time, and then stop the needle insertion, to avoid continuous needle insertion and deeper into the human body, which is easy to penetrate the pleural cavity and damage the other organs. Therefore, when operating, the operator needs to operate with both hands, one hand holding the syringe 101, and the other hand repeatedly twitching the needle handle 102 in a small amplitude. Compared with single-handed operation, two-handed operation is not stable enough when inserting the needle. When operating with one hand, the operator can put one hand on the puncture site, and then the center of gravity is better controlled when operating with one hand, and the needle can be inserted more steadily to avoid shaking.

[0054] Furthermore, in order to allow the operator to hold the syringe 1 with one hand to insert the needle while extracting the accumulated fluid, the operator can easily control the needle handle 102 to withdraw repeatedly with a small amplitude with one hand. Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a sleeve 2 is sleeved on the outside of the syringe 101, and an extension hole 13 is provided at one end of the sleeve 2, and the end of the needle 105 extends to the outside of the sleeve 2 through the extension hole 13, and an extension hole 24 is opened at the other end of the sleeve 2, and one end of the needle handle 102 provided with a handle cap 103 extends to the outside of the sleeve 2 through the extension hole 24, and a pumping mechanism 5 is provided on the sleeve 2. The pumping mechanism 5 can make the handle cap 103 of the syringe 1 pump repeatedly, and in addition, the pumping mechanism 5 is configured to be activated by the operator holding the sleeve 2 with one hand and using the thumb to press and control, thereby achieving the purpose of inserting the needle with one hand and controlling the needle handle 102 to pump repeatedly with small amplitudes with one hand.

[0055] Specifically, the pumping mechanism 5 includes a pressing portion 501 and a transmission portion 502, wherein the transmission portion 502 is disposed inside the wall of the sleeve 2, and the pressing portion 501 is disposed outside the sleeve 2, and the pressing portion 501 is in transmission connection with the transmission portion 502. The pressing portion 501 causes the transmission portion 502 to move, thereby controlling the handle cap 103 to move, so that the needle handle 102 can drive the piston 104 to repeatedly withdraw inside the syringe 101. In addition, the pressing portion 501 is disposed near the end of the needle head 105, so that during operation, such as Figure 13As shown, when the operator holds the sleeve 2 for needle insertion, the thumb can rest on the pressing part 501. Then, after inserting the needle once more, the operator presses the thumb once, causing the needle handle 102 to control the piston 104 to perform a suction operation. Thus, the operation of suction can be achieved while inserting the needle with one hand, eliminating the need for two hands, making it more convenient when extracting fluid. Additionally, by setting the pressing part 501 of the pressing activation component outside the sleeve 2 and pressing it with the operator's thumb, during the needle insertion and suction operation, the movement amplitude is smaller, only requiring the thumb to press, reducing the impact on the smoothness of the needle insertion of the syringe barrel 101.

[0056] For the convenience of assembling the sleeve 2, in this embodiment, as Figure 1 , Figure 2 , Figure 4 , Figure 5 shown, the sleeve 2 is set to be detachably connected by an upper half cylinder 201 and a lower half cylinder 202. Specifically, the sleeve 2 is horizontally cut along the center line. The upper part is the upper half cylinder 201, and the lower part is the lower half cylinder 202. The inner holes of both the upper half cylinder 201 and the lower half cylinder 202 are semi-circular. Then, the upper half cylinder 201 and the lower half cylinder 202 are overlapped and assembled to form the sleeve 2 with an inner hole. It should be noted that the upper half cylinder 201 and the lower half cylinder 202 can be set to be detachably connected by screws. Correspondingly, a positioning component 6 is provided at the opposite end faces of the upper half cylinder 201 and the lower half cylinder 202. Through the positioning component 6, the upper half cylinder 201 and the lower half cylinder 202 can be limited when connected.

[0057] More specifically, the positioning component 6 includes a positioning post 601 and a positioning hole 602. The positioning posts 601 are fixedly arranged on both sides of the lower end face of the upper half cylinder 201, and the positioning holes 602 are opened on both sides of the upper end face of the lower half cylinder 202. The positioning posts 601 and the positioning holes 602 are in sliding plug-in fit, and the outer wall of the positioning post 601 fits with the inner wall of the positioning hole 602.

[0058] As Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10As shown in the figure, the transmission part 502 includes a through groove 521, a lower pressing block 522, a sliding groove 523, a moving block 524, a pressing block 525, a ejector rod 526 and a first spring 527. Among them, through grooves 521 are respectively opened in the inner walls of both side cylinders of the inner hole of the upper half cylinder 201, and the through grooves 521 penetrate through the lower end surface and the outer circumferential upper end outer wall of the upper half cylinder 201 vertically. A lower pressing block 522 is longitudinally and slidably inserted into the inside of the through groove 521, and the lower pressing block 522 is set to be square. The outer walls of both sides, the front end and the rear end of the lower pressing block 522 are respectively attached to and slidably engaged with the inner walls of both sides, the front end and the rear end of the through groove 521. Correspondingly, on the same vertical axis as the through groove 521, sliding grooves 523 are respectively opened in the inner walls of both side cylinders of the inner hole of the lower half cylinder 202, and the sliding grooves 523 penetrate through the upper end surface outer wall of the lower half cylinder 202. One end of the bottom end of the lower pressing block 522 is inserted into the inside of the sliding groove 523, and the front end surface and the rear end surface of the lower pressing block 522 are respectively slidably engaged with the front inner wall and the rear inner wall of the sliding groove 523. It should be noted that the length of the sliding groove 523 along the axial direction of the sleeve 2 is greater than the length of the lower pressing block 522 along the axial direction of the sleeve 2. A moving block 524 is horizontally slidably arranged inside the sliding groove 523, and the front end surface and the rear end surface of the moving block 524 are respectively slidably engaged with the front inner wall and the rear inner wall of the sliding groove 523. There are spaces between the two side end faces of the moving block 524 and the inner walls of both sides of the sliding groove 523. An ejector rod 526 is fixedly arranged on the side of the moving block 524 facing the syringe 1 handle cap 103. A through hole 7 is communicated and opened on the side of the sliding groove 523 facing the syringe 1 handle cap 103, and the through hole 7 penetrates through the end face of the sleeve 2 facing the handle cap 103. The ejector rod 526 is slidably inserted into the through hole 7, and one end of the ejector rod 526 passes through the through hole 7 and extends to the side of the sleeve 2 facing the handle cap 103. One end of the ejector rod 526 contacts the handle cap 103. In addition, a first spring 527 is arranged on the side of the moving block 524 facing the handle cap 103, and both ends of the first spring 527 are respectively in contact with the moving block 524 and the side wall of the sliding groove 523. The first spring 527 is sleeved outside the ejector rod 526 and is used to rebound the moving block 524 towards the needle 105.

[0059] In addition, it should be noted that, as Figure 10As shown in the figure, the lower pressing block 522 and the moving block 524 are offset from each other left and right on the vertical axis. Specifically, the lower pressing block 522 is located on one side of the moving block 524 facing the needle head 105. On the side of the moving block 524 facing the needle head 105, a pressing block 525 is fixedly arranged. One side end face of the pressing block 525 is in contact with the other inner wall of the sliding groove 523. The lower pressing block 522 is located above the pressing block 525, and the length of the lower pressing block 522 in the axial direction of the sleeve 2 is less than the length of the pressing block 525 in the axial direction of the sleeve 2. The upper end face of the pressing block 525 is set as an inclined plane, and the inclined plane of the pressing block 525 is inclined in the axial direction of the sleeve 2. The inclined plane of the upper end face of the pressing block 525 is specifically set such that the end close to the needle head 105 is the lowest point, and the end close to the handle cap 103 is the highest point. In addition, one side of the bottom wall of the lower pressing block 522 is in contact with the upper end face of the pressing block 525, and the contact point between the bottom wall of the lower pressing block 522 and the upper end face of the pressing block 525 is close to the side of the pressing block 525 facing the moving block 524. In other words, the contact point between the lower pressing block 522 and the upper end face of the pressing block 525 is located at the high point of the inclined plane. Through the above settings, when the lower pressing block 522 moves downward, due to the inclined plane setting of the upper end face of the pressing block 525, when the lower pressing block 522 moves downward, it can move the pressing block 525 toward the handle cap 103 direction through the inclined plane, thereby causing the moving block 524 to move in the same direction, enabling the moving block 524 to drive the ejector rod 526 to move in the same direction. The movement of the ejector rod 526 can contact the handle cap 103 at one end, and then push the handle cap 103 through the ejector rod 526, causing the needle handle 102 to move toward the handle cap 103 direction to perform a retraction action. By setting the height and inclined plane angle of the pressing block 525, the pushing distance of the lower pressing block 522 moving downward on the moving block 524 can be adjusted, and then the pushing distance of the ejector rod 526 on the handle cap 103 can be adjusted, thereby realizing a small retraction action.

[0060] The downward movement of the lower pressing block 522 is controlled by the pressing part 501. Specifically, as Figure 1 、 Figure 9 and Figure 11 shown, the pressing part 501 includes a pressing semi-ring 511 and an elastic limiting part 512. Among them, the pressing semi-ring 511 is arranged above the outer part of the upper half cylinder 201. There is a distance between the inner wall of the inner circle of the pressing semi-ring 511 and the outer circumferential outer wall of the upper half cylinder 201. The top end of the lower pressing block 522 inside the two side walls of the inner hole of the upper half cylinder 201 passes through the outer circumferential outer wall of the upper half cylinder 201 and extends above the upper half cylinder 201. The top end of the lower pressing block 522 is fixedly connected to the inner wall of the inner circle of the pressing semi-ring 511, and the pressing semi-ring 511 can move longitudinally above the outer part of the upper half cylinder 201 under the limitation of the elastic limiting part 512.

[0061] The elastic limiting member 512 includes a slide rod 5121, a limiting hole 5122, a relief hole 5123, a limiting disk 5124, and a second spring 5125. Among them, the slide rod 5121 is fixedly arranged on the inner wall of the inner circle of the pressing half-ring 511. Correspondingly, a limiting hole 5122 is opened at the highest point of the outer circumferential wall of the upper half cylinder 201. One end of the slide rod 5121 is slidably inserted into the inside of the limiting hole 5122. A relief hole 5123 is opened below the limiting hole 5122, and the inner diameter of the relief hole 5123 is larger than the inner diameter of the limiting hole 5122. The bottom end of the slide rod 5121 extends into the inside of the relief hole 5123. A limiting disk 5124 is fixedly arranged at one end of the slide rod 5121 located inside the relief hole 5123. The outer circumferential wall of the limiting disk 5124 is slidably matched with the relief hole 5123. The outer diameter of the limiting disk 5124 is larger than the inner diameter of the limiting hole 5122, and the limiting disk 5124 is located below the limiting hole 5122. There is a distance between the bottom surface of the limiting disk 5124 and the bottom wall of the relief hole 5123. Thus, the limiting is carried out through the upward movement of the limiting disk 5124 and the pressing half-ring 511. A second spring 5125 is further arranged between the pressing half-ring 511 and the top wall of the upper half cylinder 201 to rebound the pressing half-ring 511 upward, and the second spring 5125 is sleeved on the outer wall of the slide rod 5121.

[0062] Therefore, through the above settings, when a withdrawal action needs to be performed, the operator only needs to press the pressing half-ring 511 downward with the thumb, so that the pressing half-ring 511 compresses the second spring 5125. At the same time, the limiting disk 5124 moves downward inside the relief hole 5123. While the pressing half-ring 511 moves downward, it drives the pressing block 522 to press downward, so that the pressing block 522 moves downward and squeezes the extrusion block 525 toward the handle cap 103 through the inclined surface of the extrusion block 525. Thus, the moving block 524 drives the ejector rod 526 to move synchronously, and the ejector rod 526 moves the handle cap 103 synchronously, thereby realizing a small-scale withdrawal action. Then the operator releases the pressing half-ring 511, and the pressing half-ring 511 rebounds under the action of the second spring 5125, so that the pressing half-ring 511 moves upward. The upward movement of the pressing half-ring 511 drives the pressing block 522 to move upward. After the pressing block 522 moves upward and there is no extrusion from the pressing block 522, the first spring 527 rebounds, so that the moving block 524 moves backward toward the needle head 105, and then the ejector rod 526 moves backward to complete the withdrawal action. Thus, when a withdrawal action needs to be performed, the operator only needs to press the pressing half-ring 511. Therefore, while the operator holds the sleeve 2 with one hand, only by pressing and moving with the thumb can the small-scale withdrawal action of the syringe barrel 101 be completed, which is more convenient.

[0063] Considering that after the syringe 1 has completed one aspiration of the effusion, the syringe 1 needs to be replaced, and the syringe 1 is a disposable item. Therefore, the syringe barrel 101 is set to be movably inserted into the sleeve 2. Thus, after one aspiration operation is completed, the syringe 1 can be pulled out for replacement, and then the outer wall of the syringe barrel 101 needs to be movably inserted into the sleeve 2. When the syringe barrel 101 is movably inserted into the sleeve 2, when the operator holds the sleeve 2 to insert the needle, the needle tip 105 is subject to resistance, and the syringe barrel 101 will move inside the sleeve 2, and thus the needle cannot be inserted. And when the internal insertion setting of the syringe barrel 101 and the sleeve 2 is too tight, it will be inconvenient to operate each time the syringe 1 is replaced.

[0064] Therefore, as Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 9 and Figure 12 shown, a clamping assembly 8 is provided inside the sleeve 2, and the clamping operation of the clamping assembly 8 is set to be controlled by the operator's grasping of the sleeve 2. Thus, the connection between the syringe barrel 101 and the sleeve 2 can be set to be movably inserted, and the insertion between the syringe barrel 101 and the sleeve 2 can be set to be in a relatively loose state. After the syringe barrel 101 is inserted into the sleeve 2 and when the needle needs to be inserted, the operator only needs to hold the sleeve 2 to complete the fixation of the position of the syringe barrel 101 inside the sleeve 2, thereby making the position fixation operation of the syringe barrel 101 more convenient.

[0065] Specifically, the clamping assembly 8 includes an upper clamping sleeve 801, a lower clamping sleeve 802, an upper grip sleeve 803, a lower grip sleeve 804, a connecting rod 805, a through hole 806, and a spring three 807. Among them, the upper clamping sleeve 801 and the lower clamping sleeve 802 are respectively arranged above and below the inside of the sleeve 2. Specifically, the upper clamping sleeve 801 and the lower clamping sleeve 802 are respectively arc-shaped sleeves, and the upper clamping sleeve 801 and the lower clamping sleeve 802 are symmetrically arranged up and down with the horizontal center line of the sleeve 2 as the axis of symmetry. The upper clamping sleeve 801 is located in the inner hole of the upper half cylinder 201, and the lower clamping sleeve 802 is located inside the inner hole of the lower half cylinder 202. The syringe barrel 101 is located between the upper clamping sleeve 801 and the lower clamping sleeve 802, and the upper clamping sleeve 801 and the lower clamping sleeve 802 move towards each other to clamp the syringe barrel 101. In addition, anti-slip pads 9 are respectively fixedly arranged on the inner ring inner walls of the upper clamping sleeve 801 and the lower clamping sleeve 802 facing each other, and the contact between the anti-slip pads 9 and the syringe barrel 101 improves the position stability of the syringe barrel 101 inside the sleeve 2.

[0066] In addition, an upper grip sleeve 803 is provided above the outside of the upper half cylinder 201, and a lower grip sleeve 804 is provided below the outside of the lower half cylinder 202. Both the upper grip sleeve 803 and the lower grip sleeve 804 are set as arc-shaped sleeves. There is a gap between the inner wall of the inner circle of the upper grip sleeve 803 and the outer circumferential outer wall of the upper half cylinder 201. Correspondingly, there is a gap between the inner wall of the inner circle of the lower grip sleeve 804 and the outer circumferential outer wall of the lower half cylinder 202. A perforation 806 is longitudinally formed in the inner wall of the barrel wall of the upper half cylinder 201. Correspondingly, a perforation 806 is longitudinally formed inside the barrel wall of the lower half cylinder 202. Both ends of the perforation 806 penetrate through the outer circumferential outer wall and the inner wall of the inner circle of the upper half cylinder 201 and the lower half cylinder 202 respectively. A connecting rod 805 is slidably inserted into the inside of the perforation 806. The upper grip sleeve 803 and the upper clamping sleeve 801 are connected by the connecting rod 805. Correspondingly, the lower grip sleeve 804 and the lower clamping sleeve 802 are connected by the connecting rod 805. In addition, a third spring 807 is provided between the upper grip sleeve 803 and the upper half cylinder 201. Similarly, a third spring 807 is provided between the lower grip sleeve 804 and the lower half cylinder 202. The third spring 807 is sleeved outside the connecting rod 805. The third spring 807 is respectively used to bounce the upper grip sleeve 803 upward and the lower grip sleeve 804 downward.

[0067] It should be noted that the upper grip sleeve 803 and the lower grip sleeve 804 are located on the side of the pressing half ring 511 facing the handle cap 103. The syringe barrel 101 is movably inserted between the upper clamping sleeve 801 and the lower clamping sleeve 802. Therefore, through the above settings, when the operator grasps the sleeve 2, the operator grasps the upper and lower grip sleeves 804, so that the upper grip sleeve 803 and the lower grip sleeve 804 move towards each other, thereby driving the upper clamping sleeve 801 and the lower clamping sleeve 802 to move towards each other through the connecting rod 805, and then clamping the syringe barrel 101 by the upper clamping sleeve 801 and the lower clamping sleeve 802 to fix the syringe barrel 101. After the operator releases it, through the third spring 807, the upper grip sleeve 803 and the lower grip sleeve 804 move away from each other, and then the upper clamping sleeve 801 and the lower clamping sleeve 802 move away from each other synchronously to release the syringe barrel 101, and the operator pulls out the syringe barrel 101.

[0068] During operation, the operator holds the upper grip sleeve 803 and the lower grip sleeve 804 with one hand and holds them tightly, so that the upper grip sleeve 803 and the lower grip sleeve 804 move towards each other, thereby driving the upper clamping sleeve 801 and the lower clamping sleeve 802 to clamp and fix the syringe barrel 101 therebetween, and improving the fixing stability through the anti-slip pad 9. In addition, while holding the upper and lower grip sleeves 804, the operator can place the thumb on the pressing half ring 511, and then perform needle insertion. When a retraction action is required, the operator only needs to press the thumb once to complete the retraction of the needle handle 102.

[0069] In this embodiment, the needle insertion operation is set as a manual operation because the feelings when the needle 105 is in the muscle tissue and when it penetrates the muscle tissue are different. When inserting the needle, it is more convenient for the operator to feel the progress of the needle insertion. And when the needle 105 touches the bone, the operator can directly feel the resistance, so as to change the position in time and re-insert the needle. The aspiration operation is set to be controlled by manual pressing. When aspirating the needle handle 102, when the needle 105 is inside the muscle tissue, it is difficult to aspirate if the needle 105 is blocked. And when the needle 105 enters a blood vessel or the thoracic cavity, the aspiration resistance will become smaller. Therefore, by manually pressing the operator to aspirate, it is convenient to feel the position of the needle 105 through the different pressing resistances.

[0070] In addition, as Figure 1 shown, observation grooves 10 are opened at the outer wall of the sleeve 2 near the needle 105 end, and a plurality of them are provided. Correspondingly, a magnifying glass for observing the connection between the syringe barrel 101 and the needle 105 of the syringe 1 can be selected to be arranged inside the observation groove 10, so as to facilitate the operator to observe the liquid intake situation of the internal syringe barrel 101 during a small aspiration process.

[0071] An extraction method of a novel effusion extraction device for oncology treatment includes the following steps:

[0072] Step 1: The operator inserts the syringe 1 into the sleeve 2 so that the syringe barrel 101 is located between the upper clamp 801 and the lower clamp 802, and the needle 105 extends out of the sleeve 2 through the first extension hole 3, and the handle cap 103 is located outside the other end of the sleeve 2 and the handle cap 103 contacts the ejector rod 526;

[0073] Step 2: The operator holds the sleeve 2 with one hand and keeps holding the upper grip 803 and the lower grip 804, and makes the upper grip 803 and the lower grip 804 move towards each other, so that the upper clamp 801 and the lower clamp 802 move towards each other to clamp the syringe barrel 101 therebetween;

[0074] Step 3: The operator inserts the needle 105 into the human skin and continuously advances the needle step by step;

[0075] When the operator needs to withdraw the needle handle 102 slightly during needle insertion, the operator only needs to press the pressing half ring 511 downward with the thumb, so that the pressing half ring 511 compresses the spring 2 5125, and at the same time, the limit plate 5124 moves downward inside the clearance hole 5123. While the pressing half ring 511 moves downward, it drives the pressing block 522 downward, so that the pressing block 522 moves downward and squeezes the squeezing block 525 toward the handle cap 103 through the inclined surface of the squeezing block 525, thereby making the moving block 524 drive the ejector rod 526 to move synchronously, and the ejector rod 526 moves the handle cap 103 synchronously, thereby realizing a small withdrawal action, and then the operator releases the pressing half ring 511, and the pressing half ring 511 is pressed by the spring 2 5125 The rebound causes the pressing half ring 511 to move upward, and the upward movement of the pressing half ring 511 drives the lower pressing block 522 to move upward. The lower pressing block 522 moves upward, and after there is no squeezing of the lower pressing block 522, the spring 1 527 rebounds, causing the moving block 524 to reset and move toward the needle head 105, thereby causing the ejector rod 526 to reset and move, completing the withdrawal action. During the withdrawal, the operator observes the withdrawal of liquid into the syringe 101 through the observation slot 10. When blood enters, the needle is stopped, the needle is repositioned and reinserted, and before reinserting the needle, the pressing part is released, the handle cap is pressed, the blood drawn into the syringe is discharged, and the handle cap is re-contacted with the ejector rod. When effusion enters, the needle is stopped, and the operator directly extracts the handle cap 103 to extract the effusion.

[0076] Step 4: After the effusion is extracted, the needle 105 is pulled out, the upper grip 803 and the lower grip 804 are loosened, and the syringe 101 is pulled out.

[0077] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A novel effusion extraction device for oncology treatment, characterized in that: The sleeve (2) comprises a barrel cavity for accommodating the syringe (1), one end of the sleeve (2) is provided with an extension hole (3) for passing through the needle (105), and the other end is open for passing through the needle handle (102) and the end handle cap (103); The sleeve (2) is provided with a pumping mechanism (5), comprising a pressing portion (501) and a transmission portion (502); The pressing portion (501) is arranged outside the wall of the sleeve (2). The transmission part (502) is arranged in the wall of the sleeve (2), and includes a lower pressing block (522) that penetrates the wall and is connected to the pressing part (501), and the bottom end of the lower pressing block abuts against the extrusion block (525) to push the push rod (526) connected to the extrusion block (525) to move along the length direction of the sleeve (2), and then push the handle cap (103) of the syringe (1).

2. A novel effusion extraction device for oncology treatment as claimed in claim 1, characterized in that: The sleeve (2) consists of an upper half-sleeve (201) and a lower half-sleeve (202).

3. A novel effusion extraction device for oncology treatment as claimed in claim 2, characterized in that: The joint surface of the upper half cylinder (201) and the lower half cylinder (202) is provided with a positioning assembly (6), comprising a plurality of groups of matching positioning columns (601) and positioning holes (602).

4. A novel effusion extraction device for oncology treatment as claimed in claim 2, characterized in that: The open end of the sleeve (2) is narrowed to form a second extension hole (4) through which the needle handle (102) of the syringe and the handle cap (103) at the end thereof can be seen.

5. A novel effusion extraction device for oncology treatment as claimed in claim 2, characterized in that: The pressing portion (501) is arc-shaped, and the lower pressing blocks (522) are a pair, symmetrically arranged in the cylinder walls on both sides of the sleeve (2); The push rods (526) are a pair, and are respectively linked by the lower pressing block (522) through the squeezing block (525).

6. A novel effusion extraction device for oncology treatment as claimed in claim 5, characterized in that: Slide grooves (523) are provided at the cross sections of the cylinder walls on both sides of the lower cylinder (202), and a moving block (524) is placed in the slide groove (523). One side of the moving block is fixedly connected to an extrusion block (525), and the end surface of the extrusion block (525) is an inclined surface that receives the thrust of the lower pressing block, and the other side of the moving block is fixedly connected to a push rod (526); In the slide groove, the push rod (526) is sleeved with a spring 1 (527), one end of which abuts against the moving block (524) and the other end of which abuts against the inner wall of the slide groove.

7. A novel effusion extraction device for oncology treatment as claimed in claim 5, characterized in that: The bottom of the pressing portion (501) is provided with an elastic limiting member (512), which comprises a clearance hole (5123) provided in the wall of the sleeve (2), and the aperture of the clearance hole (5123) is narrowed to be a limiting hole (5122). The limiting plate (5124) is placed in the clearance hole (5123), and the sliding rod (5121) connected to the limiting plate (5124) is connected to the pressing part (501) via the limiting hole (5122); The sliding rod (5121) is sleeved with a second spring (5125), the top end of which abuts against the pressing portion (501) and the bottom end of which abuts against the sleeve (2).

8. A novel effusion extraction device for oncology treatment as claimed in claim 1, characterized in that: A clamping assembly (8) is arranged inside the sleeve (2), comprising an upper clamping sleeve (801), a lower clamping sleeve (802), an upper gripping sleeve (803), and a lower gripping sleeve (804); The upper jacket (801) and the lower jacket (802) are symmetrically arranged on the inner wall of the sleeve (2). The upper jacket (801) and the lower jacket (802) are respectively connected to the upper gripping sleeve (803) and the lower gripping sleeve (804) on the outer side wall of the sleeve (2) via a connecting rod (805) penetrating the wall of the sleeve (2); On the outer wall of the sleeve (2), the connecting rods (805) are respectively sleeved with springs three (807).

9. A novel effusion extraction device for oncology treatment as claimed in claim 1, characterized in that: The sleeve (2) is provided with a plurality of observation slots (10) at the end near the needle tip (105); A magnifying glass for observing the connection between the syringe barrel (101) and the needle (105) of the syringe (1) is provided in the observation groove.

Images