Precise pressure-controlled aqueous humor quantitative collection device and use method therefor

Abstract

A precise pressure-controlled aqueous humor quantitative collection device and a use method therefor. The precise pressure-controlled aqueous humor quantitative collection device comprises a liquid collection assembly (6), a control knob (3), an adjustment device (2), a suction cylinder (5), a piston assembly (4), and a limiting device (1). The limiting device (1) is installed on the adjustment device (2). The control knob (3) is slidably sleeved on the adjustment device (2) and can rotate relative to the adjustment device (2) to a locked working position or a starting working position. The piston assembly (4) penetrates through the limiting device (1) and the adjustment device (2), and is fixedly installed on the control knob (3). An outer wall of the suction cylinder (5) is provided with several scale lines. The suction cylinder (5) is fixed to the adjustment device (2) and is sleeved outside the limiting device (1) and the piston assembly (4). The liquid collection assembly (6) is installed at the end of the suction cylinder (5) away from the adjustment device (2) and is in communication with the suction cylinder (5). By using the precise pressure-controlled aqueous humor quantitative collection device, secondary injuries caused by intraoperative movement of the patient's eyeball can be effectively avoided, and the volume of sampled intraocular fluid and the reduced intraocular pressure level can also be precisely controlled. The operation process is convenient and quick, significantly reducing patient discomfort.

Description

Accurate pressure control aqueous quantitative collection device and its using method TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to an accurate pressure control aqueous quantitative collection device and its using method. BACKGROUND

[0002] Aqueous humor is a transparent liquid, which fills the anterior and posterior chambers, about 0.25-0.3ml, constantly produced from the eye, discharged to the outside of the eye, dynamically maintaining the balance of intraocular pressure. In clinical work, when the patient has acute intraocular pressure rise, if the drug pressure reduction effect is poor, a small amount of aqueous humor is often extracted by anterior chamber puncture to reduce intraocular pressure.

[0003] However, since surface anesthesia is often used in ophthalmic examination room or operating room when performing anterior chamber puncture and collecting aqueous humor, and the operation is performed by one hand under a slit lamp or surgical microscope, the patient often has involuntary eye movement during the operation due to tension, which causes local eye injury during puncture, such as corneal epithelial scratch, conjunctival laceration and hemorrhage. For beginners and unskilled doctors, anterior chamber puncture and liquid extraction can also cause serious adverse consequences, such as injury to the lens causing cataract and leading to decreased vision; injury to the iris causing anterior chamber hemorrhage. There is no special medical device for collecting aqueous humor or anterior chamber puncture in current clinical operation. The insulin syringe or 1ml syringe needle used at present has simple structure and cannot accurately control the volume of collected aqueous humor, which is prone to cause too little or too low intraocular pressure, and often requires repeated puncture to collect a certain amount of aqueous humor or reduce the intraocular pressure to the expected level. At the same time, the long needle makes it difficult to control the depth of penetration into the anterior chamber during puncture, and the needle penetrates too deep to easily damage the surrounding structure, causing anterior chamber hemorrhage or traumatic cataract, and the needle penetrates too shallow to collect aqueous humor and reduce intraocular pressure. SUMMARY

[0004] Therefore, the present application aims to provide an accurate pressure control aqueous quantitative collection device, which comprises:

[0005] The device comprises a liquid collecting assembly, a control knob, an adjusting device, a suction cylinder, a piston assembly and a limiting device.

[0006] The limiting device is installed on the adjusting device.

[0007] The control knob is slidably sleeved on the adjusting device, and the control knob can be rotated to a locking working position or a starting working position relative to the adjusting device.

[0008] The piston assembly is fixedly installed on the control knob through the limiting device and the adjusting device.

[0009] The outer wall of the suction cylinder is provided with a plurality of scale lines, the suction cylinder is fixed to the adjusting device, and the suction cylinder is sleeved outside the limiting device and the piston assembly.

[0010] The liquid collecting assembly is installed at one end of the suction cylinder away from the adjusting device, and the liquid collecting assembly is in communication with the suction pipe.

[0011] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the adjusting device comprises an adjusting rod head, an adjusting rod core, and an adjusting knob; the outer wall of the adjusting rod head is arrayed with a plurality of first splines, a guide groove is formed between every two first splines, the inside of the adjusting rod head is provided with a first mounting hole, the bottom of the first mounting hole is provided with a second mounting hole, one end of the adjusting rod core is provided with a shaft shoulder, the adjusting rod core extends into the second mounting hole, and one end of the adjusting rod core is fixed to the first mounting hole through the shaft shoulder, so that an annular groove is formed between the outer wall of the adjusting rod core and the inner wall of the first mounting hole, the end of the adjusting knob is mounted to the end of the first mounting hole, so that a gap is left between the adjusting knob and the plurality of first splines, and the outer wall of the adjusting knob is provided with a fixed scale line.

[0012] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the inner wall of the adjusting rod core is arrayed with a plurality of second splines.

[0013] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the limiting device comprises a nut, a screw rod, and a limiting piston; the outer wall of the screw rod is provided with a plurality of first grooves, one end of the screw rod penetrates through the nut and is mounted to the adjusting rod core, and the first grooves are matched with the second splines, and the other end of the screw rod is mounted with the limiting piston.

[0014] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the piston assembly comprises a piston rod and a piston; one end of the piston rod sequentially penetrates through the limiting piston, the screw rod, the adjusting rod core, and is fixedly mounted with the control knob, and the other end of the piston rod is mounted to the piston.

[0015] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the outer wall of the nut is arrayed with a plurality of third splines.

[0016] The above-mentioned aqueous humor quantitative collection device with precise pressure control, wherein the inner wall of the suction cylinder is in contact with the limiting piston and the piston, one end of the suction cylinder is mounted to the annular groove through a flange, and the inside of the suction cylinder is provided with a second groove matched with the third splines.

[0017] The quantitative aqueous humor collection device with precise pressure control, wherein the inner wall of the control knob is provided with a plurality of clamping blocks slidingly arranged in a plurality of guide grooves, and the outer wall of the control knob is provided with a starting scale line and a locking scale line; the control knob is rotated relative to the gap through the clamping blocks, so that the starting scale line is aligned with the fixed scale line to be located in the starting working position, or the locking scale line is aligned with the fixed scale line to be located in the locking working position.

[0018] The quantitative aqueous humor collection device with precise pressure control, wherein the liquid collecting assembly comprises a liquid collecting tube and a needle; one end of the liquid collecting tube is installed on the suction cylinder, and the other end of the liquid collecting tube is installed with the needle.

[0019] The use method of the quantitative aqueous humor collection device with precise pressure control, wherein the method comprises the quantitative aqueous humor collection device with precise pressure control,

[0020] Step one: rotate the control knob to the locking working position, and then rotate the adjusting device to move the limiting device to a certain scale line of the suction cylinder;

[0021] Step two: slide the control knob relative to the adjusting device, the control knob drives the piston assembly to move, and a negative pressure cavity is formed between the limiting device and the piston assembly;

[0022] Step three: rotate the control knob to the starting working position;

[0023] Step four: perform a puncture operation on the puncture site through the liquid collecting assembly;

[0024] Step five: rotate the control knob to the locking working position, due to the negative pressure effect, the piston assembly moves towards the limiting device, and the liquid starts to be pumped; at this time, the control knob is simultaneously moved away from the adjusting device relative to the guide groove through the clamping blocks, until the piston assembly and the limiting device are in contact, and the quantitative pumping is completed;

[0025] Step six: withdraw the liquid collecting assembly from the puncture site, and detach it from the suction cylinder;

[0026] Step seven: rotate the adjusting device, so that the limiting device drives the piston assembly to move to one end of the suction cylinder where the liquid collecting assembly is installed; the piston assembly drives the control knob to slide on the adjusting device, and then the control knob is rotated to the starting working position.

[0027] The technical scheme has the following positive effects compared with the prior art:

[0028] By the application of the present application, a precise pressure control aqueous humor quantitative collection device and its use method are provided. Through the use of the device, intraoperative secondary damage caused by patient eye movement during surgery can be effectively avoided, and the loss of intraocular fluid sample volume collected by a syringe is also avoided. Moreover, the volume of the sampled intraocular fluid and the reduced intraocular pressure level can be precisely controlled. The operation process is convenient and fast, and the patient's pain is significantly reduced. Moreover, the device can be reused, which is convenient for clinicians to operate, reduces the use of clinical consumables, and is safe and environmentally friendly. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 is a schematic diagram of a precise pressure control aqueous humor quantitative collection device according to the present application.

[0030] Fig. 2 is an exploded view of a precise pressure control aqueous humor quantitative collection device according to the present application.

[0031] Fig. 3 is a schematic diagram of an adjusting rod head according to the present application.

[0032] Fig. 4 is a schematic diagram of an adjusting rod core according to the present application.

[0033] Fig. 5 is a schematic diagram of a piston assembly according to the present application.

[0034] Fig. 6 is a schematic diagram of the initial state of a precise pressure control aqueous humor quantitative collection device according to the present application.

[0035] Fig. 7 is a schematic diagram of the adjusting and quantifying of a precise pressure control aqueous humor quantitative collection device according to the present application.

[0036] Fig. 8 is a schematic diagram of a negative pressure cavity formed by a front push piston according to the present application.

[0037] Fig. 9 is a schematic diagram of a locking piston according to the present application.

[0038] Fig. 10 is a schematic diagram of a puncture operation according to the present application.

[0039] Fig. 11 is a schematic diagram of the start of liquid extraction according to the present application.

[0040] Fig. 12 is a schematic diagram of the completion of liquid extraction according to the present application.

[0041] 1, limiting device; 11, nut; 111, third spline; 12, screw rod; 121, first groove; 13, limiting piston; 2, adjusting device; 21, adjusting rod head; 22, first spline; 23, guide groove; 24, first mounting hole; 241, second mounting hole; 25, adjusting rod core; 251, second spline; 252, shaft shoulder; 26, ring groove; 27, adjusting knob; 28, gap; 29, fixed scale; 3, control knob; 31, clamping block; 4, piston assembly; 41, piston rod; 42, piston; 5, suction cylinder; 51, flange; 52, second groove; 6, liquid collection assembly; 61, liquid collection tube; 62, needle; 7, clamping nut. DETAILED DESCRIPTION

[0042] The present application will be further described below in conjunction with the drawings and specific embodiments, but not as a limitation of the present application.

[0043] The structure, proportion, size and the like shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the limited conditions that the present application can be implemented, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that the present application can produce, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the present specification are only for the convenience of clear description, and are not used to limit the scope of the present application, and the change or adjustment of the relative relationship is also considered as the implementation of the present application.

[0044] As shown in FIGS. 1-12, a preferred embodiment of an aqueous humor quantitative collection device capable of precise pressure control is shown, which includes: liquid collection assembly 6, control knob 3, adjusting device 2, suction cylinder 5, piston assembly 4, limiting device 1.

[0045] The limiting device 1 is installed on the adjusting device 2; the control knob 3 is slidably sleeved on the adjusting device 2, and the control knob 3 can be rotated relative to the adjusting device 2 to a locked working position or a starting working position; the piston assembly 4 is fixedly installed on the control knob 3 through the limiting device 1 and the adjusting device 2; the outer wall of the suction cylinder 5 is provided with a plurality of scale lines, the suction cylinder 5 is fixed on the adjusting device 2, and the suction cylinder 5 is sleeved on the outside of the limiting device 1 and the piston assembly 4; the liquid collection assembly 6 is installed on one end of the suction cylinder 5 away from the adjusting device 2, and the liquid collection assembly 6 is in communication with the suction tube 5.

[0046] In actual use, the outer wall of the suction cylinder 5 is provided with a scale of 0-0.3ml, the maximum volume of the liquid collecting assembly 6 is 0.3ml, the inner diameter of the suction cylinder 5 is 5mm, the outer diameter is 6mm, the outer diameter of the control knob 3 is 17.2mm, the total length of the suction cylinder 5 is 61.5mm, the length of the needle 62 extending out of the liquid collecting pipe 61 is 2mm, and the length of the liquid collecting pipe is 41mm. The suction cylinder 5 and the liquid collecting pipe 61 are both made of transparent material.

[0047] The application also has the following embodiments on the basis of the above:

[0048] Further, the aqueous humor quantitative collection device with precise pressure control comprises an adjusting device 2, which comprises an adjusting rod head 21, an adjusting rod core 25 and an adjusting knob 27. The outer wall of the adjusting rod head 21 is provided with a plurality of first splines 22, and a guide groove 23 is formed between every two splines 22. The inner part of the adjusting rod head 21 is provided with a first mounting hole 24, and the bottom of the first mounting hole 24 is provided with a second mounting hole 241. One end of the adjusting rod core 25 is provided with a shaft shoulder 252, the adjusting rod core 25 extends into the second mounting hole 241, and one end of the adjusting rod core 25 is fixed to the first mounting hole 24 through the shaft shoulder 252, so that a ring groove 26 is formed between the outer wall of the adjusting rod core 25 and the inner wall of the first mounting hole 24. The end of the adjusting knob 27 is mounted to the end of the first mounting hole 24, so that a gap 28 is left between the adjusting knob 27 and the plurality of first splines 22. The outer wall of the adjusting knob 27 is provided with a fixed scale line 29.

[0049] Further, the aqueous humor quantitative collection device with precise pressure control comprises an adjusting device 2, which comprises an adjusting rod head 21, an adjusting rod core 25 and an adjusting knob 27. The outer wall of the adjusting rod head 21 is provided with a plurality of first splines 22, and a guide groove 23 is formed between every two splines 22. The inner part of the adjusting rod head 21 is provided with a first mounting hole 24, and the bottom of the first mounting hole 24 is provided with a second mounting hole 241. One end of the adjusting rod core 25 is provided with a shaft shoulder 252, the adjusting rod core 25 extends into the second mounting hole 241, and one end of the adjusting rod core 25 is fixed to the first mounting hole 24 through the shaft shoulder 252, so that a ring groove 26 is formed between the outer wall of the adjusting rod core 25 and the inner wall of the first mounting hole 24. The end of the adjusting knob 27 is mounted to the end of the first mounting hole 24, so that a gap 28 is left between the adjusting knob 27 and the plurality of first splines 22. The outer wall of the adjusting knob 27 is provided with a fixed scale line 29.

[0050] Further, the aqueous humor quantitative collection device with precise pressure control comprises a limiting device 1, which comprises a nut 11, a screw rod 12 and a limiting piston 13. The outer wall of the screw rod 12 is provided with a plurality of first grooves 121, one end of the screw rod 12 extends through the nut 11 and is mounted to the adjusting rod core 25, and the first grooves 121 are matched with the second splines 251. The other end of the screw rod 12 is mounted to the limiting piston 13.

[0051] Further, the aqueous humor quantitative collection device with precise pressure control comprises a piston assembly 4, which comprises a piston rod 41 and a piston 42. One end of the piston rod 41 extends through the limiting piston 13, the screw rod 12 and the adjusting rod core 25 in sequence and is fixedly mounted to the control knob 3. The other end of the piston rod 41 is mounted to the piston 42. Specifically, the piston rod 41 is mounted to the control knob 3 through a clamping nut 7. Further, one end of the piston rod 41 mounted to the control knob 3 has a reduced shaft shoulder, and the outer wall of the shaft shoulder is provided with a thread, so that the piston rod 41 can be mounted to the control knob 3 through the clamping nut 7. Furthermore, the piston 42 and the limiting piston 13 of the device are both made of wear-resistant material and are in close contact with the inner wall of the suction cylinder 5.

[0052] Further, the aqueous humor quantitative collection device with precise pressure control, wherein the outer wall of the nut 11 is provided with a plurality of third splines 111.

[0053] Further, the aqueous humor quantitative collection device with precise pressure control, wherein the inner wall of the suction cylinder 5 is in contact with the limiting piston 13 and the piston 42, and one end of the suction cylinder 5 is installed in the ring groove 26 through the flange 51, and the inside of the suction cylinder 5 is provided with a second groove 52 matched with the third spline 111.

[0054] Further, the aqueous humor quantitative collection device with precise pressure control, wherein the inner wall of the control knob 3 is provided with a plurality of clamping blocks 31 slidingly arranged in a plurality of guide grooves 23, and the outer wall of the control knob 3 is provided with a start scale line and a locking scale line, and the control knob 3 is rotated relative to the gap 28 through the clamping block 31, so that the start scale line is aligned with the fixed scale line 29 to be located in the start working position, or the locking scale line is aligned with the fixed scale line 29 to be located in the locking working position.

[0055] Further, the aqueous humor quantitative collection device with precise pressure control, wherein the liquid collecting assembly 6 comprises a liquid collecting pipe 61 and a needle 62, one end of the liquid collecting pipe 61 is installed in the suction cylinder 5, and the other end of the liquid collecting pipe 61 is installed with the needle 62. Specifically, the diameter of the one end of the suction cylinder 5 installed with the liquid collecting pipe 61 is smaller, so that the suction cylinder 5 can be inserted into the liquid collecting pipe 61, so that the installation of the suction cylinder 5 and the liquid collecting pipe 61 is more compact, and the disassembly is convenient, and further, the one end of the liquid collecting pipe 61 installed with the needle 62 is a tapered surface, which makes it more convenient to install the needle 62.

[0056] The device has the following installation process:

[0057] First step: install the adjusting device 2; press the adjusting rod core 25 into the second installation hole 241 of the adjusting rod head 21 until the shaft shoulder 252 is in contact with the groove bottom of the first installation hole 24;

[0058] Second step: install the limiting device 1; install the nut 11 and the limiting piston 13 on both ends of the screw rod 12 respectively, and rotate the nut 11 until the end face of the nut 11 is in contact with the end face of the limiting piston 13;

[0059] Third step: install the piston assembly 4; install the piston 42 on one end of the piston rod 41, and install the installed limiting device 1 on the piston rod 41 until the limiting piston 13 is in contact with the piston 42, at this time the piston 42, the limiting piston 13 and the nut 7 have no axial gap;

[0060] Fourth step: install the limiting device 1 and the piston assembly 4 in the suction cylinder 5, at this time the third spline 111 on the nut 11 is installed on the second groove 52 on the suction cylinder 5;

[0061] Step 5: push the adjusting rod core 25 in the adjusting device 2 to align with the first groove 121 on the screw rod 12 until the flange 51 is installed in the ring groove 26, and the flange 51 is in contact with the groove bottom of the first mounting hole 24;

[0062] Step 6: push the adjusting knob 27 from the suction cylinder 5 to the end of the adjusting device 2 until the end face of the adjusting knob 27 is in contact with the end face of the adjusting rod head 21, and is fixed by a screw;

[0063] Step 7: rotate the adjusting knob 27 so that the limiting piston 13 drives the piston 42 to move to the end of the suction cylinder 5 where the liquid collecting pipe 61 is installed;

[0064] Step 8: slide the control knob 3 onto the adjusting rod core 25 until the clamping block 31 is located in the gap 28, rotate the control knob 3 so that the start scale line on is aligned with the fixed scale line 29, and finally rotate the clamping nut 7 to install the piston rod 41 on the control knob 3;

[0065] Step 9: install the needle 62 on the liquid collecting pipe 61, and then install the liquid collecting pipe 61 on the suction cylinder 5, as shown in FIG. 6.

[0066] A method for using an accurate pressure control aqueous humor quantitative collection device, wherein the device comprises the above-mentioned accurate pressure control aqueous humor quantitative collection device,

[0067] Step 1: rotate the control knob 3 to the locking working position, and then rotate the adjusting device 2 to move the limiting device 1 to a certain scale line of the suction cylinder 5; specifically, adjust the liquid suction volume, taking 0.2ml as an example, first rotate the control knob 3 to the locking scale line off so that the locking scale line off is aligned with the fixed scale line 29 on the adjusting knob 27, and then rotate the adjusting knob 27 so that the limiting piston 13 moves backward to the position of the 0.2ml scale line of the suction cylinder 5; during the adjustment process, due to the negative pressure effect of the rear cavity of the piston 42, the piston 42 will move backward together with the limiting piston 13, and at this time the 0.2ml scale line is between the limiting piston 13 and the piston 42, and the control knob 3 will also move backward along the guide groove 23, even when the maximum adjustment amount is reached, it will not be separated from the guide groove 23 of the adjusting device 2, please refer to FIG. 7.

[0068] Step 2: slide the control knob 3 relative to the adjusting device 2, the control knob 3 drives the piston assembly 4 to move, and a negative pressure cavity is formed between the limiting device 1 and the piston assembly 4; specifically, push the control knob 3 forward relative to the adjusting rod head 21, so as to drive the piston 42 to move forward to the end of the suction cylinder 5 to form a negative pressure cavity, please refer to FIG. 8.

[0069] Step three: rotate the control knob 3 to the starting working position; specifically, rotate the control knob 3 so that the starting scale line on is aligned with the fixed scale line 29 of the adjusting knob 27, please refer to Fig. 9.

[0070] Step four: puncture the puncture site by the liquid collecting assembly 6; specifically, puncture the puncture site by the part of the needle 62, please refer to Fig. 10.

[0071] Step five: rotate the control knob 3 to the locking working position, since the piston assembly 4 is moved towards the limiting device 1 under the action of negative pressure, the liquid extraction is started, at this time the control knob 3 is simultaneously moved away from the adjusting device 2 along the guide groove 23 through the clamping block 31, until the piston assembly 4 and the limiting device 1 are in contact, the quantitative liquid extraction is completed. Specifically, rotate the control knob 3 so that the locking scale line off is aligned with the fixed scale line 29, since the piston 42 automatically retreats under the action of negative pressure, the liquid extraction is started, please refer to Fig. 11, at the same time the control knob 3 is moved backward along the guide groove 23, until the piston 42 and the limiting piston 13 are in contact, the quantitative liquid extraction is completed, as shown in Fig. 12.

[0072] Step six: withdraw the liquid collecting assembly 6 from the puncture site, and detach it from the suction cylinder 5; specifically, withdraw the needle 62 from the puncture site, then detach the liquid collecting pipe 61 from the suction cylinder 5, at this time the state of the device please refer to Fig. 7.

[0073] Step seven: rotate the adjusting device 2, so that the limiting device 1 drives the piston assembly 4 to move to the end of the suction cylinder 5 where the liquid collecting assembly 6 is installed, the piston assembly 4 drives the control knob 3 to slide on the adjusting device 2, then rotate the control knob 3 to the starting working position. Specifically, rotate the adjusting knob 27, so that the limiting piston 13 can drive the piston 42 to move to the end of the suction cylinder 5 where the liquid collecting pipe 61 is installed, at this time the control knob 3 moves in the guide groove 23 of the adjusting rod head 21, until the clamping block 31 moves to the gap 28, rotate the control knob 3 so that the starting scale line on is aligned with the fixed scale line 29, the control knob 3 is in the starting working position.

[0074] The above description is only the preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious changes made according to the content of the present application should be included in the protection scope of the present application.

Claims

1. A device for quantitatively collecting aqueous humor with precise pressure control, characterized in that: include: Liquid collecting assembly, control button, adjusting device, suction cylinder, piston assembly, and limiting device; The limiting device is installed on the adjusting device; The control button is slidably mounted on the adjustment device, and the control button can be rotated relative to the adjustment device to a locking position or a starting position; The piston assembly passes through the limiting device and the adjusting device and is fixedly installed on the control button; The outer wall of the suction cylinder is provided with a plurality of scale lines, the suction cylinder is fixed to the adjustment device, and the suction cylinder is sleeved on the outside of the limiting device and the piston assembly; The liquid collecting component is installed at one end of the suction cylinder away from the regulating device, and the liquid collecting component is communicated with the suction pipe.

2. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 1, characterized in that: The adjusting device includes: an adjusting rod head, an adjusting rod core, and an adjusting button; the outer wall array of the adjusting rod head is provided with a plurality of first splines, and a guide groove is formed between every two of the first splines; the interior of the adjusting rod head is provided with a first mounting hole, and the bottom of the first mounting hole is provided with a second mounting hole; one end of the adjusting rod core is provided with a shaft shoulder, the adjusting rod core extends into the second mounting hole, and one end of the adjusting rod core is fixed to the first mounting hole through the shaft shoulder, so that an annular groove is formed between the outer wall of the adjusting rod core and the inner wall of the first mounting hole, and the end of the adjusting button is installed at the end of the first mounting hole, so that a gap is left between the adjusting button and the plurality of first splines, and the outer wall of the adjusting button is provided with a fixed scale line.

3. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 2, characterized in that: The inner wall array of the adjusting rod core is provided with a plurality of second splines.

4. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 3, characterized in that: The limiting device includes: a nut, a screw, and a limiting piston; the outer wall of the screw is provided with a plurality of first grooves, one end of the screw passes through the nut and is installed on the adjusting rod core, and the first groove cooperates with the second spline, and the other end of the screw is installed with the limiting piston.

5. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 4, characterized in that: The piston assembly includes: a piston rod and a piston; one end of the piston rod passes through the limit piston, the screw rod, and the adjusting rod core in sequence and is fixedly installed with the control button, and the other end of the piston rod is installed on the piston.

6. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 5, characterized in that: An array of third splines is provided on the outer wall of the nut.

7. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 6, characterized in that: The inner wall of the suction cylinder is in contact with the limiting piston and the piston, and one end of the suction cylinder is mounted on the annular groove through a flange. A second groove matching the third spline is provided inside the suction cylinder.

8. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 2, characterized in that: The inner wall of the control button is provided with a plurality of blocks slidably arranged in the plurality of guide grooves, and the outer wall of the control button is provided with a start scale line and a lock scale line. The control button is rotated relative to the gap through the block so that the start scale line is aligned with the fixed scale line and is located in the start working position, or the lock scale line is aligned with the fixed scale line and is located in the lock working position.

9. The device for quantitatively collecting aqueous humor with precise pressure control according to claim 1, characterized in that: The liquid collecting assembly comprises: a liquid collecting tube and a needle. One end of the liquid collecting tube is mounted on the suction cylinder, and the other end of the liquid collecting tube is mounted on the needle.

10. A method for using a device for quantitatively collecting aqueous humor with precise pressure control, characterized in that: A device for quantitatively collecting aqueous humor with precise pressure control according to any one of claims 1 to 9, Step 1: rotating the control knob to the locking position, and then rotating the adjustment device to move the limit device to a certain scale line on the suction cylinder; Step 2: Slide the control button relative to the adjustment device, so that the control button drives the piston assembly to move, and a negative pressure chamber is formed between the limit device and the piston assembly; Step 3: Rotate the control knob to the start position; Step 4: Puncture the puncture site using the liquid collection component; Step 5: Rotate the control knob to the locked working position. Due to the negative pressure, the piston assembly moves toward the limit device and begins to pump liquid. At this time, the control knob simultaneously moves away from the adjustment device through the relative guide groove of the block until the piston assembly contacts the limit device, and the quantitative pumping is completed. Step 6: withdraw the liquid collection component from the puncture site and remove it from the suction cylinder; Step 7: Rotate the adjusting device so that the limiting device drives the piston assembly to move to one end of the suction cylinder where the liquid collecting assembly is installed. The piston assembly drives the control button to slide on the adjusting device, and then rotate the control button to the start working position.

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