CN105662485B - The readable negative pressure puncture device of pressure - Google Patents

Abstract

The invention discloses a negative pressure puncture device with readable pressure, which comprises a syringe barrel and a negative pressure gauge. A piston rod is arranged inside the syringe barrel, a piston is arranged at the front end of the piston rod, and a negative pressure gauge is arranged on the nozzle of the syringe barrel. Pressure control valve, a piston rod telescopic locking device is installed between the syringe barrel and the piston rod, and the piston rod telescopic locking device adjusts the negative pressure between the piston and the negative pressure control valve. The syringe barrel is connected, the invention closes the negative pressure control valve before puncturing, pulls the piston rod backward to form a negative pressure in the syringe barrel, uses the piston rod telescopic locking device to adjust the negative pressure in the syringe barrel, and passes the negative pressure The pressure gauge accurately reads the negative pressure value in the syringe barrel. This device effectively avoids the influence of pulling the syringe piston on the negative pressure, and the influence of syringe vibration and distraction on positioning. The entire negative pressure puncture device is light and beautiful. Easy to operate.

Description

Negative pressure puncture device with readable pressure

technical field

The invention relates to the technical field of medical instruments, in particular to a pressure-readable negative pressure puncture device.

Background technique

Puncture is a diagnosis and treatment technique in which a puncture needle is inserted into the body cavity to extract secretions, tissues, and cells for laboratory tests, injecting gas or contrast agent into the body cavity for contrast examination, or injecting drugs into the body cavity. It is a commonly used clinical method for disease diagnosis or treatment method has an irreplaceable role of other methods. At present, the existing puncture needles mainly use ordinary syringes for puncture, and the operation is laborious. The operator must constantly pay attention to whether the negative pressure value of the puncture needle is up to the standard when puncturing, and cannot concentrate on locating the lesion. Abnormal conditions such as syringe shaking affect the puncture, and the negative pressure of the conventional puncture needle is unstable, which may easily lead to unsatisfactory tissue or cell suction at the puncture site, which is difficult to meet the needs of clinical pathological smear examination, and repeated punctures are prone to inflammatory reactions and patient discomfort Reactions, causing surgical site bleeding, local metastasis of tumor or cancer cells.

Contents of the invention

In order to solve the above technical problems, the present invention provides a pressure-readable negative pressure puncture device, which can form a stable negative pressure before entering the patient's skin tissue, and the size of the negative pressure can be adjusted according to needs.

The technical solution is as follows: a pressure-readable negative pressure puncture device, the key of which is: comprising a syringe barrel and a negative pressure gauge, a piston rod is arranged inside the syringe barrel, a piston is arranged at the front end of the piston rod, and the The nozzle of the syringe barrel is provided with a negative pressure control valve, and a piston rod telescopic locking device is provided between the syringe barrel and the piston rod, and the piston rod telescopic locking device adjusts the piston and the negative pressure. The negative pressure between the control valves is controlled, and the joint of the negative pressure gauge communicates with the syringe barrel at the front end of the piston through a pipeline. The beneficial effect of adopting this technical solution is to close the negative pressure control valve before puncturing, pull the piston rod backward to form a negative pressure in the syringe barrel, and then use the piston rod telescopic locking device to adjust and maintain the negative pressure in the syringe barrel. Stable, the negative pressure value in the syringe barrel can be accurately read through the negative pressure gauge to ensure that it meets the puncture requirements.

Further, the telescopic locking device for the piston rod includes at least one block, a radial contraction control mechanism is provided on the piston rod, the block is connected with the radial contraction control mechanism, and the inner wall of the syringe barrel is provided with There are block limit strips. By adopting this scheme, the radial contraction control mechanism can be used to radially shrink the clamping block while pulling the piston rod backward, so as to prevent the clamping block from being blocked by the clamping block limit bar, and facilitate the pulling of the piston rod. After the pressure reaches the requirement, the radial contraction control mechanism is released, and the block retracts and stabilizes after encountering the block limit bar, thereby maintaining the stability of the negative pressure in the syringe barrel.

The above-mentioned piston rod is a cylinder, and a pressure-inducing tube is arranged in the axial direction inside the piston rod. The connector of the negative pressure gauge is connected. With this design, the pressure in the pressure introduction tube is consistent with the pressure in the syringe barrel, and the negative pressure gauge only needs to be connected with the pressure introduction tube to accurately measure the negative pressure value in the syringe barrel, which effectively simplifies the connection between the negative pressure gauge and the syringe needle. The connection line of the barrel.

The above-mentioned radial contraction control mechanism includes a block support plate arranged in the piston rod along the length direction, the block is provided at the front of the block support plate, and the block passes radially outward A compression spring is provided between the cylinder wall of the piston rod, the block support plate and the pressure introduction tube, one end of the compression spring is fixedly connected to the block support plate, and the other end is fixed to the pressure introduction tube connected, and a control button is provided at the rear of the block support plate, and the control button passes through the cylinder wall of the piston rod radially outward. With this solution, by pressing the control button, the support plate of the block can be radially approached to drive the block to shrink radially, which is convenient for the block to bypass the fast limit bar. After the control button is released, the block resets to maintain the syringe The internal pressure is stable, and the operation of this scheme is simple and convenient.

There are two block support plates, and the two block support plates are arranged opposite to the two sides of the pressure introduction pipe, and each of the two block support plates is respectively provided with at least four blocks , the blocks are axially arranged on the block support plate, the distance between adjacent blocks is equal, and the control buttons are respectively provided on the rear parts of the two block support plates. With this design, there are multiple negative pressure adjustment gears to meet different puncture requirements.

There are two locking block limiting strips in total, and the two locking block limiting bars are arranged on the inner wall of the syringe barrel in the radial direction of the locking block support plate. Adopting this scheme, the clamping block limit bar is arranged inside the syringe barrel and has a beautiful appearance and saves space.

A filter membrane is arranged in the above-mentioned pressure induction tube. This scheme can effectively filter out the solid impurities in the extract, and prevent the solid impurities from blocking the intake pipe of the negative pressure gauge and affecting the reading of the negative pressure gauge.

A push-pull handle is provided at the rear of the piston rod, the negative pressure gauge is an axial pressure gauge, and the negative pressure gauge is fixed on the push-pull handle. Adopting this design is convenient for pushing and pulling the piston rod and reading the reading on the negative pressure gauge.

A syringe handle is provided at the rear of the syringe barrel. The design is adopted to facilitate holding the syringe barrel during puncturing.

The protruding end of the clamping block is provided with a guiding slope, and the guiding slope faces the limiting strip of the clamping block. When the design is adopted to pull the piston rod, it is convenient for the block to bypass the limit bar of the block.

Beneficial effect: the beneficial effect of adopting the present invention is to close the negative pressure control valve before puncturing, pull the piston rod backward to form a negative pressure in the syringe barrel, and then use the piston rod telescopic locking device to adjust the negative pressure in the syringe barrel so that It meets the puncture requirements, and uses the radial contraction control mechanism to lock the negative pressure in the syringe to maintain the stability of the negative pressure in the syringe. The negative pressure in the syringe can be accurately read through the negative pressure gauge. The device is convenient for the operator to concentrate on locating the lesion, and effectively avoids the influence of pulling the syringe piston on the negative pressure, the syringe shake and the distraction of attention on the positioning. The whole negative pressure puncture device is light and beautiful, and it is easy to operate.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

As shown in Figure 1, a pressure-readable negative pressure puncture device includes a syringe barrel 2 and a negative pressure gauge 12, and the nozzle of the syringe barrel 2 is provided with a negative pressure control valve 7, and the syringe needle A piston rod 1 is arranged inside the barrel 2, a piston 5 is arranged at the front end of the piston rod 1, and a piston rod telescopic locking device is arranged between the syringe barrel 2 and the piston rod 1, and the piston rod telescopic locking device adjusts the The size of the negative pressure between the piston 5 and the negative pressure control valve 7, the joint of the negative pressure gauge 12 communicates with the syringe barrel 2 at the front end of the piston 5 through a pipeline, and the telescopic locking device for the piston rod Including at least one clamping block 6, a radial contraction control mechanism is provided on the piston rod 1, the clamping block 6 is connected with the radial contraction control mechanism, and the inner wall of the syringe barrel 2 is provided with a clamping block limiter. bit strip 9.

The piston rod 1 is a cylinder, and the piston rod 1 is provided with a pressure guiding tube 14 along the axial direction. The axis of the pressure guiding tube 14 overlaps with the axis of the piston rod 1 . The front end of the tube 14 passes through the piston 5 and communicates with the syringe barrel 2, the rear end of the pressure introduction tube 14 communicates with the joint of the negative pressure gauge 12, and the pressure introduction tube 14 is provided with a filter membrane 13 , the filter membrane 13 is close to the front end of the pressure introduction tube 14 .

The radial contraction control mechanism includes a block support plate 11 arranged in the piston rod 1 along the length direction, and the block support plate 11 is two pieces, and the two block support plates 11 are arranged opposite to each other. On both sides of the pressure introduction pipe 14, four blocks 6 are respectively provided on the front parts of the two block support plates 11, and the four blocks 6 are axially arranged on the blocks. On the block support plate 11, the spacing between the adjacent blocks 6 is equal, and the block 6 passes through the cylinder wall of the piston rod 1 radially outward, and the two block support plates 11 are connected with the Two compression springs 8 are respectively arranged between the pressure introduction tubes 14, and the two compression springs 8 are axially distributed between the block support plate 11 and the pressure introduction tube 14, and the compression springs 8 One end is fixedly connected to the block support plate 11, and the other end is fixedly connected to the pressure introduction tube 14. The rear parts of the two block support plates 11 are respectively provided with control buttons 10, and the control buttons 10 are arranged radially The cylinder wall of the piston rod 1 passes outwards, and the control button 10 is close to the rear part of the piston rod 1. There are two block limit strips 9, and the two block limit strips 9 is arranged on the inner wall of the syringe barrel 2 in the radial direction of the two block supporting plates 11 , and the block limiting strip 9 is close to the rear of the syringe barrel 2 .

It can also be seen from the figure that a syringe handle 3 is provided at the rear of the syringe barrel 2, a push-pull handle 4 is provided at the rear of the piston rod 1, and the negative pressure gauge 12 is an axial pressure gauge. The negative pressure gauge 12 is fixed on the push-pull handle 4 , and the protruding ends of the blocks 6 are all provided with guide slopes, and the guide slopes are facing the stop bar 9 of the blocks.

The piston 5 is provided with a pressure induction tube through hole, and the front end of the pressure induction tube 14 passes through the pressure induction tube through hole and communicates with the syringe barrel 2, and the filter membrane 13 is located in the pressure induction tube. In the pressure introduction tube 14 in the tube through hole, the center line of the pressure introduction tube through hole coincides with the axis line of the syringe barrel 2 .

When in use, a puncture needle can be installed on the nozzle of the syringe barrel 2, then the negative pressure control valve 7 is closed, and the piston rod 1 is pulled backward so that a negative pressure is formed in the syringe barrel 2 at the front end of the piston 5. Press the control button 10 at the same time as the rod 1 to make the two block support plates 11 radially close together, thereby driving the block 6 to approach radially, so as to avoid being blocked by the block limit bar 9 during the drawing process and unable to continue to draw backward Pull the piston rod 1, read the specific negative pressure value in the syringe barrel 2 through the negative pressure gauge 12, release the control button 10 when the negative pressure reaches the requirement, and the compression spring 8 resets to drive the block support plate 11 to reset, further Drive the clamping block 6 to reset, and the reset clamping block 6 encounters the blocking of the clamping block limit bar 9 to maintain the current position stable, thereby preventing the piston 5 from moving towards the nozzle of the syringe barrel 2 under the normal external atmospheric pressure , so as to ensure that the negative pressure in the syringe barrel 2 is stable, and then the puncture needle is punctured to the required depth, then the negative pressure control valve 7 is opened, the tissue or cells are sucked into the barrel, the puncture needle is pulled out, and the control button is pressed 10 Push the piston rod 1 forward to push out the obtained tissue or cells for preservation, so as to carry out the next step of inspection.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those of ordinary skill in the art can make a variety of similar implementations under the inspiration of the present invention without violating the purpose and claims of the present invention. It means that such transformations all fall within the protection scope of the present invention.

Claims (5)

1. A pressure-readable negative pressure puncture device is characterized in that: it comprises a syringe barrel (2) and a negative pressure gauge (12), and the inside of the syringe barrel (2) is provided with a piston rod (1). The front end of the piston rod (1) is provided with a piston (5), the nozzle of the syringe barrel (2) is provided with a negative pressure control valve (7), and the syringe barrel (2) and the piston rod (1) is provided with a piston rod telescopic locking device, which adjusts the negative pressure between the piston (5) and the negative pressure control valve (7), and the negative pressure gauge (12 ) joint communicates with the syringe barrel (2) at the front end of the piston (5) through a pipeline; The piston rod telescopic locking device includes at least one block (6), a radial contraction control mechanism is provided on the piston rod (1), the block (6) is connected with the radial contraction control mechanism, The inner wall of the syringe barrel (2) is provided with a block limiting bar (9), and the protruding end of the block (6) is provided with a guide slope, and the guiding slope faces the block limit bar (9). ); The piston rod (1) is a cylinder, and the piston rod (1) is provided with a pressure introduction tube (14) along the axial direction, and the front end of the pressure introduction tube (14) passes through the piston (5) and connects with the syringe The syringe (2) is communicated, and the rear end of the pressure introduction pipe (14) is communicated with the joint of the negative pressure gauge (12); The radial contraction control mechanism includes a block support plate (11) arranged in the piston rod (1) along the length direction, and the block (11) is provided at the front of the block support plate (11). 6), the block (6) passes through the cylinder wall of the piston rod (1) radially outward, and a pressure is provided between the block support plate (11) and the pressure introduction pipe (14). Spring (8), one end of the compression spring (8) is fixedly connected to the block support plate (11), and the other end is fixedly connected to the pressure introduction tube (14). The rear of the block support plate (11) A control button (10) is arranged on the top, and the control button (10) passes through the cylinder wall of the piston rod (1) radially outward; A syringe handle (3) is provided at the rear of the syringe barrel (2). 2. The pressure-readable negative pressure puncture device according to claim 1, characterized in that: there are two block support plates (11), and the two block support plates (11) are arranged opposite to each other. On both sides of the pressure introduction pipe (14), at least four blocks (6) are respectively provided on the two block support plates (11), and the blocks (6) are arranged along the axial direction On the block support plate (11), the distances between adjacent blocks (6) are equal, and the control buttons (10) are respectively provided at the rear of the two block support plates (11). ). 3. The pressure-readable negative pressure puncture device according to claim 2, characterized in that: there are two block limit strips (9) in total, and the two block limit strips (9) are facing each other. It is arranged on the inner wall of the syringe barrel (2) in the radial direction of the two clamping block support plates (11). 4. The pressure-readable negative pressure puncture device according to claim 1, characterized in that: a filter membrane (13) is provided in the pressure introduction tube (14). 5. The pressure-readable negative pressure puncture device according to claim 1, characterized in that: a push-pull handle (4) is provided at the rear of the piston rod (1), and the negative pressure gauge (12) is a shaft To the pressure gauge, the negative pressure gauge (12) is fixed on the push-pull handle (4).