Novel effusion extraction device for oncology department treatment and extraction method thereof

Abstract

The invention discloses a novel effusion extraction device for oncology department treatment and an extraction method thereof, and relates to the technical field of effusion extraction, the novel effusion extraction device comprises a sleeve with a sleeve cavity used for containing a syringe, one end of the sleeve is provided with an extension hole I used for penetrating out of a needle head, and the other end of the sleeve is open and used for penetrating out of a needle handle and an end handle cap; the sleeve is provided with a drawing mechanism and comprises a pressing part and a transmission part; the pressing part is arranged outside the sleeve wall of the sleeve, and the transmission part is arranged in the sleeve wall of the sleeve. The invention aims to solve the problems that in the prior art, when effusion extraction and needle insertion are carried out, an operator generally operates by two hands in the operation of withdrawing and needle insertion at the same time, and the other hand repeatedly draws a needle handle, so that the gravity center is difficult to control, the needle insertion is not stable enough and the like. The needle inserting device has the advantages that an operator can insert a needle with one hand and control repeated withdrawing of the needle handle with one hand, and the other hand can be put on a puncture position, so that operation is simpler and more convenient, and needle inserting is more stable.

Description

Technical Field

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

[0002] A tumor refers to a neoplasm formed by the proliferation of local tissue cells under the action of various tumorigenic factors in the human body. Primary or metastatic tumors can lead to excessive production of pleural fluid, resulting in symptoms of pleural effusion. When the pleural effusion exceeds the normal level, it can cause shortness of breath and chest tightness. Therefore, the pleural effusion needs to be extracted and tested.

[0003] In the prior art, when extracting pleural effusion, the operator generally inserts the needle into the human body through a syringe, and then slowly inserts it so that the needle enters the effusion area, and then extracts the effusion through the syringe. In actual operation, for safer operation, after the needle of the syringe is inserted into the skin, it is necessary to perform the operation of withdrawing and inserting the needle at the same time. During the needle insertion process, maintaining the withdrawal action can help determine whether the needle has entered the blood vessel. If fresh blood is drawn, it means that the needle may have pierced the blood vessel. The needle should be withdrawn slightly and the direction should be changed to try again to avoid continuous needle insertion and piercing the blood vessel. In addition, by withdrawing and inserting the needle at the same time, after the needle enters the chest cavity and the effusion, the effusion can enter the syringe due to the withdrawal operation. The operator can discover it in time and then stop inserting the needle to avoid continuous needle insertion and deeper penetration into the human body, which is easy to penetrate the pleural cavity and damage other organs and cause damage.

[0004] When performing the operation of withdrawing and inserting the needle at the same time, the operator generally holds the syringe with one hand and holds the needle handle with the other hand, and then performs the operation of withdrawing and inserting the needle. Since the operator operates with both hands and the other hand repeatedly pulls the needle handle, the center of gravity is difficult to control and the syringe is prone to shake. Relatively speaking, the operator can hold the syringe with one hand and press the other hand on the puncture site of the human body during needle insertion, which makes it easier for the operator to control the slow process of needle insertion and the needle insertion operation is smoother. Therefore, there is a need for an extraction device that allows the operator to hold the syringe with one hand to insert the needle and control the repeated withdrawal of the needle handle with one hand.

[0005] In view of the above technical problems, the present invention discloses a new type of fluid extraction device and 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, the operator can insert the needle with one hand and control the repeated withdrawal of the needle handle with one hand, making the operation simpler and the operation more stable during needle insertion. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a new type of fluid extraction device and extraction method for oncology treatment, so as to solve the technical problems in the prior art that when performing fluid extraction and needle insertion, the operator generally uses both hands to operate, and the other hand repeatedly pulls the needle handle, the center of gravity is not well controlled, and the needle insertion is not stable enough. The present invention has the advantages that the operator can insert the needle with one hand and control the repeated withdrawal of the needle handle with one hand, and the other hand can be placed on the puncture site, making the operation simpler and the operation more stable during needle insertion.

[0007] The present invention is realized by the following technical scheme: The present invention discloses a novel effusion extraction device for oncology treatment, comprising a sleeve having a barrel cavity for accommodating a syringe, one end of the sleeve being provided with an extension hole for passing through the needle, and the other end being open for passing through the needle handle and its end handle cap;

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

[0009] The pressing portion is arranged outside the wall of the sleeve.

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

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

[0012] Furthermore, the joint surface of the upper half cylinder and the lower half cylinder is provided with a positioning assembly, including a plurality of groups of matching positioning columns and positioning holes.

[0013] Furthermore, the open end of the sleeve is narrowed to form an extension hole 2 through which the needle handle of the syringe and the handle cap at the end thereof can be seen.

[0014] Furthermore, the pressing portion is arc-shaped, and the pressing blocks are a pair, symmetrically arranged in the cylinder walls on both sides of the sleeve;

[0015] The push rods are a pair, which are respectively linked by the lower pressing block through the extrusion block.

[0016] Furthermore, slide grooves are provided at the cross sections of the cylinder walls on both sides of the lower cylinder, and the moving block is placed in the slide grooves. One side of the moving block is fixedly connected to the extrusion block, and the end face of the extrusion block 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 the ejector rod;

[0017] In the slide slot, the push rod sleeve is provided with a spring 1, one end of which abuts against the moving block, and the other end abuts against the inner side wall of the slide slot.

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

[0046] Fig.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] Fig.11 It is a schematic diagram of the upper half cylinder profile structure of the present invention;

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

[0049] Fig.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 Figure 1-Figure 12 As shown, it includes a syringe 1, such as Figure 1-Figure 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 Fig.13As shown, when the operator holds the sleeve 2 to insert the needle, the thumb can be placed on the pressing portion 501. After inserting the needle again, the operator presses the thumb once, so that the needle handle 102 controls the piston 104 to withdraw once, so that the needle can be inserted and withdrawn at the same time with one hand, without the need for both hands to operate, making it more convenient to extract the effusion. In addition, the pressing portion 501 of the press-to-start component is set outside the sleeve 2, and is pressed by the thumb of the operator, so that during the needle insertion and withdrawal operation, the movement amplitude is smaller, and only the thumb needs to be pressed, which reduces the impact on the stability of the needle insertion of the syringe 101.

[0056] In order to facilitate the assembly of the sleeve 2, in this embodiment, Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, the sleeve 2 is configured to be detachably connected by an upper half cylinder 201 and a lower half cylinder 202. Specifically, the sleeve 2 is cut transversely along the center line, the upper half is the upper half cylinder 201, and the lower half is the lower half cylinder 202. The inner holes of the upper half cylinder 201 and the lower half cylinder 202 are both semicircular, and then the upper half cylinder 201 and the lower half cylinder 202 are overlapped and assembled to form a sleeve 2 with an inner hole. It should be noted that the upper half cylinder 201 and the lower half cylinder 202 can be configured to be detachably connected by screws, and correspondingly, a positioning assembly 6 is provided at the end faces of the upper half cylinder 201 and the lower half cylinder 202 facing each other, and the positioning assembly 6 allows the upper half cylinder 201 and the lower half cylinder 202 to be limited when connected.

[0057] More specifically, the positioning assembly 6 includes a positioning column 601 and a positioning hole 602, and the positioning column 601 is fixedly arranged on both sides of the lower end surface of the upper half cylinder 201, and the positioning hole 602 is opened on both sides of the upper end surface of the lower half cylinder 202, and the positioning column 601 and the positioning hole 602 are slidingly plugged into each other, and the outer wall of the positioning column 601 fits with the inner wall of the positioning hole 602.

[0058] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10As shown, the transmission part 502 includes a through slot 521, a pressing block 522, a sliding slot 523, a moving block 524, an extruding block 525, a push rod 526 and a spring 527. The through slots 521 are provided inside the cylinder walls on both sides of the inner hole of the upper cylinder 201, and the through slots 521 penetrate the lower end surface and the outer wall of the upper end of the outer circumference of the upper cylinder 201 from top to bottom. The pressing block 522 is inserted into the through slot 521 for longitudinal sliding, and the pressing block 522 is set in a square shape. The outer walls of the two sides, front end and rear end of the pressing block 522 are respectively fitted and slidably matched with the inner walls of the two sides, front end and rear end of the through slot 521. Correspondingly, on the same vertical axis as the through groove 521, slide grooves 523 are respectively opened inside the cylinder walls on both sides of the inner hole of the lower half cylinder 202, and the slide grooves 523 pass through the outer wall of the upper end surface of the lower half cylinder 202, and one end of the bottom end of the lower pressure block 522 is inserted into the interior of the slide groove 523, and the front end surface and the rear end surface of the lower pressure block 522 are slidably matched with the front end inner wall and the rear end inner wall of the slide groove 523 respectively. The cam 524 is provided with a movable block 524 for slidingly sliding inside the cam 523, and the front end face and the rear end face of the movable block 524 are respectively slidably matched with the front end inner wall and the rear end inner wall of the cam 523, and the two side end faces of the movable block 524 are respectively spaced apart from the two side inner walls of the cam 523, and a push rod 526 is fixedly provided on the side of the movable block 524 facing the handle cap 103 of the syringe 1, and a through hole 7 is provided on the side of the cam 523 facing the handle cap 103 of the syringe 1, and the through hole 7 passes through the end face of the sleeve 2 on one side facing the handle cap 103, and the push rod 526 is slidably inserted in the through hole 7, and one end of the push rod 526 passes through the through hole 7 and extends to the side of the sleeve 2 facing the handle cap 103, and one end of the push rod 526 contacts the handle cap 103. In addition, a spring 527 is provided on the side of the moving block 524 facing the handle cap 103, and the two ends of the spring 527 are respectively in contact with the side walls of the moving block 524 and the slide groove 523. The spring 527 is sleeved on the outside of the push rod 526 to rebound the moving block 524 toward the needle 105.

[0059] In addition, it should be noted that Fig.10As shown, the pressing block 522 and the moving block 524 are staggered left and right on the vertical axis. Specifically, the pressing block 522 is located on the side of the moving block 524 facing the needle 105, and the extrusion block 525 is fixedly arranged on the side of the moving block 524 facing the needle 105, and the end surface of one side of the extrusion block 525 is in contact with the inner wall of the other side of the slide groove 523, and the pressing block 522 is located above the extrusion block 525, and the length of the pressing block 522 along the axial direction of the sleeve 2 is less than the length of the extrusion block 525 along the axial direction of the sleeve 2. The upper end surface of the extrusion block 525 is set as an inclined surface, and the inclined surface of the extrusion block 525 is inclined along the axial direction of the sleeve 2. The inclined surface of the upper end surface of the extrusion block 525 is specifically set so that the end close to the needle 105 direction 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 surface of the extrusion block 525, and the contact point between the bottom wall of the lower pressing block 522 and the upper end surface of the extrusion block 525 is close to the side of the extrusion block 525 facing the moving block 524. In other words, the contact point between the lower pressing block 522 and the upper end surface of the extrusion block 525 is located at the high point of the inclined surface. Through the above arrangement, when the lower pressing block 522 moves downward, through the inclined surface arrangement of the upper end surface of the extrusion block 525, when the lower pressing block 522 moves downward, the extrusion block 525 can be moved toward the handle cap 103 through the inclined surface, thereby making the moving block 524 move in the same direction, so that the moving block 524 drives the push rod 526 to move in the same direction, and the push rod 526 can move by contacting the handle cap 103 with one end, and then push the handle cap 103 through the push rod 526, so that the needle handle 102 moves toward the handle cap 103 to perform a retraction action. By setting the height and the angle of the bevel of the squeezing block 525 , the distance that the pressing block 522 pushes the moving block 524 downward can be adjusted, and then the distance that the push rod 526 pushes the handle cap 103 can be adjusted, thereby achieving a small-amplitude retraction action.

[0060] The downward movement of the pressing block 522 is controlled by the pressing portion 501. Specifically, Figure 1 , Fig. 9 and Fig.11 As shown, the pressing portion 501 includes a pressing half ring 511 and an elastic limiting member 512, wherein the pressing half ring 511 is arranged above the outside of the upper cylinder 201, and the inner wall of the inner ring of the pressing half ring 511 is spaced from the outer circumferential wall of the upper cylinder 201, and the top of the lower pressing block 522 inside the cylinder wall on both sides of the inner hole of the upper cylinder 201 passes through the outer circumferential wall of the upper cylinder 201 and extends to the top of the upper cylinder 201, and the top of the lower pressing block 522 is fixedly connected to the inner wall of the inner ring of the pressing half ring 511, and the pressing half ring 511 can be longitudinally moved above the outside of the upper cylinder 201 by being limited by the elastic limiting member 512.

[0061] The elastic limiting member 512 includes a slide rod 5121, a limiting hole 5122, a clearance hole 5123, a limiting plate 5124, and a spring 5125, wherein the slide rod 5121 is fixedly arranged on the inner wall of the inner ring of the pressing semi-ring 511, and correspondingly, a limiting hole 5122 is opened at the highest point of the outer wall of the outer circumference of the upper half cylinder 201, and one end of the slide rod 5121 is slidably inserted into the interior of the limiting hole 5122, and a clearance hole 5123 is opened below the limiting hole 5122, and the inner diameter of the clearance hole 5123 is larger than the inner diameter of the limiting hole 5122. The bottom end of the slide bar 5121 extends to the interior of the clearance hole 5123, and a limiting plate 5124 is fixedly provided at one end of the slide bar 5121 located inside the clearance hole 5123, and the outer circumferential outer wall of the limiting plate 5124 slides in cooperation with the clearance hole 5123, the outer diameter of the limiting plate 5124 is larger than the inner diameter of the limiting hole 5122, and the limiting plate 5124 is located below the limiting hole 5122, and there is a spacing between the bottom surface of the limiting plate 5124 and the bottom wall of the clearance hole 5123, and then the limiting is performed by the upward movement of the limiting plate 5124 and the pressing half ring 511, and a second spring 5125 is also provided between the pressing half ring 511 and the top wall of the upper half cylinder 201 for rebounding the pressing half ring 511 upward, and the second spring 5125 is sleeved on the outer wall of the slide bar 5121.

[0062] Therefore, through the above arrangement, when a retraction action is required, 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, and the pressing half ring 511 moves downward and drives the pressing block 522 to be pressed downward, so that the pressing block 522 moves downward and squeezes the pressing block 525 toward the direction of the handle cap 103 through the inclined surface of the pressing block 525. The moving block 524 then drives the push rod 526 to move synchronously, and the push rod 526 moves the handle cap 103 synchronously, thereby realizing a small-amplitude retraction action. After that, the operator releases the pressing half ring 511, and the pressing half ring 511 rebounds due to the action of the spring 2 5125, so that the pressing half ring 511 moves 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, so that the moving block 524 is reset and moved toward the needle head 105, and the push rod 526 is reset and moved to complete the retraction action. Therefore, when the retraction action is needed, the operator only needs to press the pressing half ring 511, so that the operator can hold the sleeve 2 with one hand and complete the small-amplitude retraction action of the syringe 101 only by pressing the thumb, which is more convenient.

[0063] Considering that the syringe 1 needs to be replaced after the syringe 1 has completed one extraction of the effusion, and the syringe 1 is a disposable item, the syringe 101 is set to be movably plugged into the sleeve 2, so that after completing one extraction, the syringe 1 can be pulled out for replacement, and the outer wall of the syringe 101 needs to be movably plugged into the sleeve 2. When the syringe 101 is movably plugged into the sleeve 2, when the operator holds the sleeve 2 to insert the needle, the needle 105 encounters resistance, and the syringe 101 will move inside the sleeve 2, and the needle cannot be inserted. If the internal plug-in setting of the syringe 101 and the sleeve 2 is too tight, it will be inconvenient to operate each time the syringe 1 is replaced.

[0064] Therefore, if Figure 1 , Figure 2 , Figure 4 , Figure 5 , Fig. 9 and Fig.12 As 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, so that the connection between the syringe 101 and the sleeve 2 can be set to a movable plug-in, and the plug-in between the syringe 101 and the sleeve 2 can be set to a looser state. After the syringe 101 is inserted into the sleeve 2, when the needle needs to be inserted, the operator only needs to hold the sleeve 2 to complete the position fixation of the syringe 101 inside the sleeve 2, thereby making the position fixation operation of the syringe 101 easier.

[0065] Specifically, the clamping assembly 8 includes an upper jacket 801, a lower jacket 802, an upper grip sleeve 803, a lower grip sleeve 804, a connecting rod 805, a through hole 806 and a spring 807, wherein the upper jacket 801 and the lower jacket 802 are respectively arranged above and below the inside of the sleeve 2. Specifically, the upper jacket 801 and the lower jacket 802 are arc-shaped jackets, and the upper jacket 801 and the lower jacket 802 are symmetrical up and down with the horizontal center line of the sleeve 2 as the symmetry axis. The upper jacket 801 is located in the inner hole of the upper half of the cylinder 201, and the lower jacket 802 is located inside the inner hole of the lower half of the cylinder 202. The syringe 101 is located between the upper jacket 801 and the lower jacket 802, and the upper jacket 801 and the lower jacket 802 move toward each other to clamp the syringe 101. In addition, anti-skid pads 9 are fixedly provided on the inner walls of the inner circles facing the upper jacket 801 and the lower jacket 802 , respectively, so that the position stability of the syringe 101 inside the sleeve 2 is improved through the contact between the anti-skid pads 9 and the syringe 101 .

[0066] In addition, an upper grip sleeve 803 is arranged above the outer part of the upper cylinder 201, and a lower grip sleeve 804 is arranged below the outer part of the lower cylinder 202. Both the upper grip sleeve 803 and the lower grip sleeve 804 are arranged in an arc-shaped sleeve, and a gap is left between the inner wall of the inner circle of the upper grip sleeve 803 and the outer wall of the outer circumference of the upper cylinder 201. Correspondingly, a gap is left between the inner wall of the inner circle of the lower grip sleeve 804 and the outer wall of the outer circumference of the lower cylinder 202. A through hole 806 is longitudinally provided on the inner wall of the cylinder wall of the upper cylinder 201. Correspondingly, a through hole 806 is longitudinally provided on the inner wall of the cylinder wall of the lower cylinder 202. The two ends of the through hole 806 respectively penetrate the outer wall of the outer circumference and the inner wall of the inner circle of the upper cylinder 201 and the lower cylinder 202. A connecting rod 805 is slidably inserted inside the through hole 806. The upper grip sleeve 803 and the upper jacket 801 are connected to each other. The connection is made through a connecting rod 805. Accordingly, the lower grip sleeve 804 and the lower clamping sleeve 802 are connected through the connecting rod 805. In addition, a spring three 807 is provided between the upper grip sleeve 803 and the upper half cylinder 201, and a spring three 807 is also provided between the lower grip sleeve 804 and the lower half cylinder 202. The spring three 807 is sleeved on the outside of the connecting rod 805. The spring three 807 is used to rebound the upper grip sleeve 803 upward and rebound 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, and the syringe 101 is movably inserted between the upper jacket 801 and the lower jacket 802. Therefore, through the above arrangement, 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 toward each other, thereby driving the upper jacket 801 and the lower jacket 802 to move toward each other through the connecting rod 805, and then clamping the syringe 101 through the upper jacket 801 and the lower jacket 802 to fix the syringe 101, and after the operator releases, the upper grip sleeve 803 and the lower grip sleeve 804 move away from each other through the spring three 807, and then the upper jacket 801 and the lower jacket 802 move away from each other synchronously to release the syringe 101, and the operator draws out the syringe 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 toward each other, thereby driving the upper clamping sleeve 801 and the lower clamping sleeve 802 to clamp and fix the syringe 101 therebetween, and the anti-slip pad 9 is used to improve the fixing stability. In addition, while holding the upper and lower grip sleeves 804, the operator can put his thumb on the pressing half ring 511 and then insert the needle. When retraction is required, the operator only needs to press his thumb once to complete the retraction of the needle handle 102.

[0069] In this embodiment, the needle insertion operation is set to manual operation because the needle 105 feels different when it is in the muscle tissue and when it breaks through the muscle tissue, so that when the needle is inserted, the operator can more easily 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 and reinsert the needle in time. The withdrawal operation is set to manual pressing for control, so that when the needle handle 102 is withdrawn, when the needle 105 is inside the muscle tissue, the needle 105 is blocked and it will be difficult to withdraw, and when the needle 105 enters the blood vessel or the chest cavity, the withdrawal resistance will become smaller. Therefore, the operator can easily feel the position of the needle 105 through the difference in pressing resistance by manually pressing the withdrawal operation.

[0070] In addition, if Figure 1 As shown, an observation groove 10 is opened on the outer wall of the sleeve 2 near the needle 105 end, and multiple observation grooves are opened. Accordingly, a magnifying glass for observing the connection between the syringe barrel 101 and the needle 105 of the syringe 1 can be optionally provided inside the observation groove 10, so that the operator can observe the liquid inflow situation of the internal syringe 101 during a small withdrawal process.

[0071] A novel extraction method of a fluid extraction device for oncology treatment comprises the following steps:

[0072] Step 1: The operator inserts the syringe 1 into the sleeve 2, so that the syringe 101 is located between the upper jacket 801 and the lower jacket 802, and the needle 105 extends out of the sleeve 2 from the extension hole 13, and the handle cap 103 is located outside the other end of the sleeve 2, and the handle cap 103 is in contact with the ejector rod 526;

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

[0074] Step 3: The operator inserts the needle 105 into the human skin and continues to step forward;

[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 and the handle cap is pressed to discharge the blood drawn into the syringe, 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 invention comprises a sleeve (2) having a barrel cavity for accommodating a syringe (1), one end of the sleeve (2) being provided with an extension hole (3) for passing through a needle (105), and the other end being open for passing through a needle handle (102) and an 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), which includes 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 an 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 grooves (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 (527), one end of which abuts against the moving block (524) and the other end 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 includes a clearance hole (5123) provided in the wall of the sleeve (2), and the opening of the clearance hole (5123) is narrowed to form 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: The sleeve (2) is provided with a clamping assembly (8) inside, 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 close to 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) through 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 end of the sleeve (2) near the needle (105) is provided with a plurality of observation slots (10); A magnifying glass for observing the connection between the syringe barrel (101) and the needle (105) of the syringe (1) may be provided in the observation groove.

10. A method for extracting fluid based on a novel effusion extraction device for oncology treatment according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Place the syringe (1) into the sleeve (2), with the syringe (101) located between the upper jacket (801) and the lower jacket (802), the needle (105) extending out of the sleeve (2) from the extension hole 1 (3), the handle cap (103) located outside the other end of the sleeve (2), and the handle cap (103) in contact with the ejector rod (526); Step 2: The operator holds the upper grip sleeve (803) and the lower grip sleeve (804) of the sleeve (2) with one hand, so that the upper grip sleeve (803) and the lower grip sleeve (804) move toward each other and then clamp the syringe (101); Step 3: The operator inserts the needle (105) into the human skin and continues to step the needle forward; When the needle handle (102) needs to be withdrawn slightly, the pressing portion (501) is pressed downward by the thumb to withdraw the syringe (1) slightly, and the withdrawn liquid inlet situation inside the syringe (101) is observed through the observation slot (10): If the needle enters the blood, stop inserting the needle, change the position and reinsert the needle; If the effusion is entered, the needle is stopped and the operator operates the handle cap (103) to extract the effusion; 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.

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