CN112336423B - Puncture auxiliary assembly and puncture device - Google Patents
Puncture auxiliary assembly and puncture device Download PDFInfo
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- CN112336423B CN112336423B CN202011130042.9A CN202011130042A CN112336423B CN 112336423 B CN112336423 B CN 112336423B CN 202011130042 A CN202011130042 A CN 202011130042A CN 112336423 B CN112336423 B CN 112336423B
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- assembly
- liquid
- injection cylinder
- piston
- puncture
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3401—Puncturing needles for the peridural or subarachnoid space or the plexus, e.g. for anaesthesia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3454—Details of tips
Abstract
The invention discloses a puncture auxiliary assembly device and a puncture device, wherein a puncture auxiliary assembly is used for assisting in positioning the tip of a needle-punching assembly and comprises an injection cylinder, the injection cylinder comprises a piston movably connected with the inner wall of the injection cylinder, the piston divides the injection cylinder into a liquid storage space and a cavity which are not communicated with each other, and an elastic structure connected with the piston is arranged in the cavity; the liquid outlet end of the injection cylinder body is detachably and hermetically connected with an outlet assembly, and the outlet assembly is communicated with the liquid storage space. The technical scheme mainly aims to provide a puncture auxiliary assembly, and aims to solve the technical problem that the pointed end of a puncture assembly is inaccurately positioned in the puncture operation process in the prior art.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a puncture auxiliary assembly and a puncture device.
Background
Epidural and extraperitoneal anesthesia requires identification of the epidural space to prevent the puncture needle from penetrating into the dura mater or the peritoneum. Currently, the most commonly used techniques are the resistance reduction techniques: wherein a needle connected to a loss of resistance (LOR) syringe is advanced through the posterior tissue layer while the syringe is forced against the contained fluid and the location of the needle tip in the epidural or extraperitoneal cavity is detected by the user's sense of resistance to pushing the syringe. This resistance reduction technique requires a very high degree of experience, on the one hand, it is possible to start the injection of the anesthetic liquid before the outside of the membrane cavity has been reached and, on the other hand, it is possible to pierce the puncture needle into the membrane.
Disclosure of Invention
The invention mainly aims to provide a puncture auxiliary assembly, and aims to solve the technical problem that the tip of a puncture assembly is inaccurately positioned in the puncture operation process in the prior art.
In order to achieve the purpose, the puncture auxiliary assembly provided by the invention is used for assisting in positioning the tip end of a puncture assembly and comprises an injection cylinder body and an outlet assembly, wherein the injection cylinder body comprises a piston movably connected with the inner wall of the injection cylinder body, the piston divides the injection cylinder body into a liquid storage space and a cavity which are not communicated with each other, and an elastic structure connected with the piston is arranged in the cavity; the liquid outlet end of the injection cylinder body is detachably connected with an outlet assembly, and the outlet assembly is communicated with the liquid storage space.
Optionally, the outlet assembly has a variable cross-sectional flow area.
Optionally, the outlet assembly comprises a first joint, a flexible structure and a second joint which are sequentially communicated, and the first joint is detachably connected with the liquid outlet end; the second connector is used for connecting the needling assembly.
Optionally, the inner diameter of the middle portion of the flexible structure is larger than the inner diameter of the two ends of the flexible structure.
Optionally, the deformation coefficient of the middle portion of the flexible structure is greater than the deformation coefficients of the two ends of the flexible structure.
Optionally, an end of the syringe barrel facing away from the liquid outlet end has an opening, and a lever of the syringe barrel connected to the piston extends out of the opening.
Optionally, the resilient assembly is arranged about an axis of the piston.
Optionally, the resilient structure is a spring.
Optionally, the injection barrel is transparent.
Optionally, the invention also provides a puncturing device which comprises the puncturing auxiliary assembly and a puncturing assembly, wherein the puncturing assembly is detachably connected with the outlet assembly in a sealing manner.
According to the technical scheme, the outlet assembly is detachably connected with the injection cylinder in a split mode, when the required liquid storage amount is large, the pressure provided by the elastic structure is larger, the outlet assembly with the smaller flow cross section area is selected to be installed on the injection cylinder, so that the flow resistance of liquid in the injection cylinder can be increased, the possibility that the liquid flows out when the tip does not reach an epidural area is reduced, the possibility of misjudgment is reduced, and the tip positioning accuracy is improved; similarly, when the required amount of stored liquid is small, an outlet assembly with a slightly larger flow cross-sectional area can be selected to be mounted on the injection cylinder. According to the technical scheme, when liquid is stored in the liquid storage space, the elastic structure stores energy and has pressure for discharging the liquid out of the injection cylinder through the outlet assembly; in the epidural puncture positioning process, when the tip does not reach the epidural area, the flow resistance of liquid (the liquid in the invention is preferably physiological saline) is higher than the pressure of the elastic structure due to human tissues, so that the liquid cannot flow out of the injection cylinder, when the tip reaches the epidural area, the pressure of the elastic structure can enable the liquid to flow out of the injection cylinder due to the epidural area being a low-pressure area or a negative-pressure area, at the moment, the piston moves towards the human body side, and medical care personnel can know that the tip has reached the epidural area through observation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of a lancing aid assembly of the present invention;
FIG. 2 is a schematic diagram of a preferred construction of the exit port assembly;
fig. 3 is a schematic view of another preferred construction of the outlet assembly.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | |
| 100 | |
100e | |
|
| | Outlet assembly | 100f | |
|
| 100b | |
100a-1 | |
|
| 100c | Piston | 100a-2 | |
|
| 100d | |
100a-3 | Second joint |
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Epidural and extraperitoneal anesthesia needs to identify the epidural and extraperitoneal cavity to prevent the puncture needle from penetrating into the dura mater or the peritoneum. Taking epidural anesthesia as an example, the puncture tip passes through: the skin, subcutaneous fat, supraspinal ligament, interspinous ligament and ligamentum flavum reach the epidural space. However, if the tip continues to pass through the epidural space, it can penetrate the dura mater, the arachnoid mater, and the subarachnoid space. The subarachnoid space has a central nervous system, and once misjudged, a large amount of anesthetic can be injected into the subarachnoid space by mistake, so that the central nervous system is damaged and even death occurs. Currently, the most commonly used techniques are the resistance reduction techniques: wherein a needle attached to a loss of resistance (LOR) syringe is advanced through the posterior tissue layer while the syringe is forced against the contained fluid and the position of the needle tip in the dura mater or the extraperitoneal cavity is detected by the user's sense of resistance to pushing the syringe. This resistance reduction technique requires a very high degree of experience, on the one hand, it is possible to start the injection of the anesthetic liquid before the outside of the membrane cavity has been reached and, on the other hand, it is possible to pierce the puncture needle into the membrane. Therefore, the invention provides a puncture auxiliary assembly. The invention provides a puncture auxiliary assembly.
In an embodiment of the present invention, a puncture assisting assembly for assisting in positioning a tip of a needle-piercing assembly, as shown in fig. 1, includes an injection cylinder 100, where the injection cylinder 100 includes a piston 100c movably connected to an inner wall thereof, the piston 100c divides the injection cylinder 100 into a liquid storage space 100b and a cavity 100d that are not communicated with each other, and an elastic structure 100e connected to the piston 100c is disposed in the cavity 100 d; the outlet end of the syringe 100 is detachably connected to an outlet assembly 100a, and the outlet assembly 100a is communicated with the liquid storage space 100 b. According to the technical scheme, when liquid is stored in the liquid storage space 100b, the elastic structure 100e stores energy and has pressure for discharging the liquid out of the injection cylinder 100 through the outlet assembly 100 a; in the epidural puncture positioning process, when the tip does not reach the epidural area, the flow resistance of the liquid (the liquid of the present invention is physiological saline without a special example) is higher than the pressure of the elastic structure 100e due to the human tissue, so that the liquid cannot flow out of the injection cylinder 100, when the tip reaches the epidural area, the pressure of the elastic structure 100e can cause the liquid to flow out of the injection cylinder due to the epidural area being a low pressure area or a negative pressure area, at this time, the piston 100c moves towards the human body side, and the medical staff can know that the tip has reached the epidural area by observation.
In actual operation, because normal saline has the effect of expansion to the epidural space, be convenient for subsequent anesthetic liquid can spread in the expansion area for epidural anesthesia is abundant, reduces patient's misery, consequently, normal saline needs certain volume. However, the more the liquid volume stored in the liquid storage space 100b, the greater the pressure provided by the elastic structure 100e, the more the pressure of the liquid may be too high when the tip has not reached the epidural area, so that the physiological saline may be forced to flow out due to the too high pressure of the elastic structure 100e, and the piston moves, so that the possibility of misjudgment may exist for medical personnel; similarly, when a smaller reservoir volume is desired, an outlet assembly 100a having a slightly larger cross-sectional flow area may be selected for installation in an injection syringe.
In addition, another implementation process is as follows: because the outlet assembly 100a can be replaced according to the volume of the liquid storage space, and the capacity of the liquid storage space can be used for meeting the requirement of the initial anesthesia dosage, the liquid used by the invention can replace the physiological saline with dissolved anesthetic liquid, and the reaching position of the tip is judged through the movement of the piston, so that the judgment and the injection of the physiological saline with dissolved anesthetic liquid are finished at one time, and the requirement of the initial anesthesia is met; however, compared with the method using physiological saline, the method has a slightly higher requirement on the operating skill of the doctor, and requires the doctor to operate the puncture auxiliary assembly provided by the invention reasonably, for example, the doctor slows down the needle inserting speed as much as possible during the puncture process, and prevents the epidural from being punctured to inject the physiological saline with anesthetic into the subarachnoid space by mistake; such as when the tip reaches the epidural space, it is also desirable to control the rate and amount of saline with anesthetic solution injected into the epidural space by controlling the cross-sectional area of the outlet assembly 100 a.
A preferred process for aspirating physiological saline according to the present invention comprises: after the outlet assembly 100a is connected to the syringe barrel 100, the saline is sucked up to ensure that the outlet assembly 100a has saline in use.
Optionally, the cross-sectional flow area of the outlet assembly 100a is variable; in particular embodiments, the cross-sectional flow area of the exit port assembly 100a can be varied by an external clamping member, such as a surgeon can change the cross-sectional flow area by squeezing or releasing the exit port assembly with his or her hands, or a surgeon can change the cross-sectional flow area by clamping the exit port assembly 100a with a surgical clamp; the variable cross-sectional flow area is intended to: on the first hand, when the liquid is stored in the liquid storage space 100, the flow cross-sectional area is clamped to 0 by a surgical clip or other medical clip, at this time, the liquid in the liquid storage space 100 cannot flow out, at this time, the acupuncture component is connected with the outlet component 100a, so that the liquid is prevented from being forced to flow out due to elasticity in the connection process of the outlet component and the acupuncture component, but a part of the original liquid of the outlet component 100a can be forced to be pressed out to a small part due to clamping, therefore, on the dosage of the physiological saline, a doctor can increase 1ml to the liquid storage space as appropriate to compensate the physiological saline forced to be pressed out; in a second aspect, the piston starts to move when the tip penetrates the epidural area, and the doctor can control the flow rate and the dosage of the liquid by changing the cross-sectional flow area; in a third aspect, the plunger exhibits a state of being akin to moving when the tip penetrates into a suspected epidural area, and the physician can change the cross-sectional area appropriately to see if the plunger is moving, and if the plunger is not moving or is still in a state of being akin to moving, the tip has not penetrated into the epidural area, and if the plunger is moving, the tip is said to penetrate into the epidural area.
Optionally, the outlet assembly 100a comprises a first joint 100a-1, a flexible structure 100a-2 and a second joint 100a-3 which are communicated in sequence; in the specific implementation process, the first joint 100a-1, the flexible structure 100a-2 and the second joint 100a-3 are communicated in sequence; in use, the cross-sectional area of the outlet assembly 100a can be varied by the healthcare worker by varying the cross-sectional area of the flexible structure 100a-2, thereby varying the flow resistance of the fluid; in a specific implementation, the flexible structure 100a-2 may be glued between the first joint 100a-1 and the second joint 100a-2 by using a flexible hose; in a specific implementation process, the first connector 100a-1 is detachably and hermetically connected with the liquid outlet end, for example, a threaded connection or a luer connection; the second adapter 100a-3 is used for connecting the acupuncture assembly, and may be a threaded connection, a luer connection, for example; luer connection is as follows: the first and second connectors 100a-1 and 100a-3 may be luer connectors. In the specific implementation process, the flexible structure 100a-2 is partially made of hard materials, and partially made of soft materials; the length of the flexible structure 100a-2 is preferably 2-5 cm, and the non-deformable hard material occupies 2/3-4/5 of the length thereof, so that the corresponding part of the soft material provides space for a doctor to change the sectional area thereof, and optionally, the part of the soft material is arranged in the vicinity of the position with the largest inner diameter. In one embodiment, the first connector 100a-1 has an inner diameter larger than the inner diameter of the second connector 100a-3, i.e. the fluid resistance is gradually increased in the fluid flow direction, which increases the flow resistance of the fluid in the injection cylinder 100, thereby facilitating the fluid to be better expelled from the cylinder due to the greater pressure difference when the tip penetrates the epidural space, so as to better observe the movement of the piston. The flexible construct 100a-2 is disposed between the two joints primarily because the joints have good mechanical connectivity, which facilitates the connection of other components and the manipulation of the flexible construct 100a-2 by the physician.
Alternatively, the outer diameter of the flexible structure 100a-2 is gradually increased and then gradually decreased in the flowing direction of the liquid; fig. 2 is a preferred outlet assembly, so configured: on one hand, the medical joint is used for limiting the position operated by a doctor, the position is arranged at the position with the largest outer diameter, an operation area is prompted to the doctor, and the doctor is prevented from touching the two joints to cause leakage at the joints; whereas, on the other hand, the outer diameter has a tendency to expand and then narrow, the inner diameter of the flexible structure 100a-2 has a similar varying arrangement: the inner diameter of the middle part of the flexible structure is larger than the inner diameters of the two ends of the flexible structure. The inner diameter of the flexible structure 100a-2 is gradually increased and then gradually decreased in the flow direction of the liquid. The flow cross-sectional area is highly variable, and the doctor can determine the suspected region where the tip has reached by the doctor by the method.
Optionally, the deformation coefficient of the middle portion of the flexible structure is greater than the deformation coefficients of the two ends of the flexible structure. The deformation coefficient of the flexible structure 100a-2 is gradually decreased and then gradually increased in the flow direction of the liquid, and the deformation coefficient is maximum at the maximum outer diameter of the flexible structure 100 a-2; namely: the deformability of the two ends of the flexible structure 100a-2 is low, the mechanical connection strength is good, and the situation that the sealing of the flexible structure 100a-2 and the two joints fails and liquid leakage occurs due to deformation generated in the manual operation process is avoided; namely: in the manipulation process, the deformable capacity of the middle position of the flexible structure 100a-2 is high, the flow cross section area can be better changed, the flow resistance of liquid can be increased or reduced through changing the flow cross section area for many times, and the tip can be judged at the suspected position for many times through changing the flow resistance; in addition, in the actual operation process, the liquid slightly flows out of the injection cylinder body due to the change of the external resistance generated by the human tissues at different positions, in this case, the flow cross-sectional area of the flexible structure 100a-2 can be properly reduced, and the flow resistance of the liquid in the injection cylinder body is increased to prevent the liquid from flowing into other tissues of the human body. In a preferred embodiment, the deformation coefficient of the flexible structure can be set by means of a varying wall thickness, namely: referring to fig. 3, the wall thickness is gradually reduced and then gradually increased in the flow direction of the liquid, and defines a minimum wall thickness, a maximum flow cross-sectional area, and a maximum deformation coefficient at a maximum outer diameter; namely: the cross-sectional flow area at the maximum external diameter is most variable, and the greater the variability, the easier the operation. Further, referring to fig. 3, the flexible structure 100a-2 can also be used as a small space for storing liquid, when the tip is inserted into the epidural space, the medical staff can change the amount and speed of the liquid injected into the epidural space by controlling the manipulation to expand the epidural space for the convenience of the subsequent anesthesia.
Optionally, the end of the syringe barrel 100 facing away from the outlet end has an opening, and the operating rod 100f of the syringe barrel 100 connected to the piston 100c extends out of the opening. In the specific implementation process, the operating lever 100f and the piston 100c are coaxially arranged and fixedly connected, and the opening reserves a reserved space for the movement of the operating lever 100 f; when withdrawing the fluid, the doctor needs to store the fluid in the reservoir space against the elastic force of the spring by pulling the operation lever 100 f.
Optionally, the resilient assembly 100c is arranged about the axis of the piston 100c to provide uniform pressure; in a specific implementation process, the elastic assemblies 100c may be three groups in total and arranged around the axis of the piston 100c, and the arrangement is preferably uniform, that is, the included angle between every two elastic assemblies 100c is 120 °; or in a specific implementation, the elastic assemblies 100c are arranged symmetrically with respect to the axis of the piston 100c in two groups.
Optionally, the resilient structure 100c is a spring; typically, the syringe barrel 100 is disposable, which can reduce costs due to the low cost of spring acquisition; moreover, the pressure provided by the spring is sufficient to meet the requirement of automatically pressing the liquid out of the injection cylinder. In practice, the pressure provided by the spring is primarily related to the volume required and the stiffness of the spring, preferably not greater than 58kpa, more preferably from about 3.45kpa to about 39kpa, more preferably from about 13.8kpa to about 39kpa, and even more preferably from about 13.8kpa to about 24.2 kpa. Preferably, through the practical discovery of the inventor of the invention: the pressure provided by the elastic structure 100c is 16-22 kpa, and within the pressure range, the identified epidural space has higher accuracy, so that the surgical risk is reduced; also in this pressure interval, the flow rate of the liquid is easily controlled based on the adjustment of the deforming part 300 a.
Alternatively, the receiving volume of the reservoir space 100b may be up to 15 ml when the resilient structure 100c is charged. Due to the adjustable flexible structure 100a-2, the flow resistance of the liquid can be improved to resist the pressure provided by the pressure accumulating component, and therefore the maximum volume of the liquid storage space 100b can reach 15 ml (at the moment, the pressure provided by the elastic structure 100c is increased), so that the liquid injected into the epidural space can expand the epidural space, the subsequently injected anesthetic liquid has a larger diffusion space, and the anesthetic effect is improved.
Optionally, the syringe barrel 100 is transparent, so as to facilitate observation of the position of the piston and the liquid storage amount, in particular, to facilitate observation of the movement of the piston when the tip reaches the epidural area, and to observe whether the piston has abnormal movement in the epidural area before the tip reaches the epidural area, so that the flexible structure can be manually controlled to judge the influence of the abnormal movement on the puncture operation; in practice, the material of the syringe barrel 100 may be transparent material of common syringes, such as PP, PVC, etc.
The invention further provides a puncture device, which comprises a puncture auxiliary component and a puncture component, the specific structure of the puncture auxiliary component refers to the above embodiments, and the puncture auxiliary component adopts all technical solutions of all the above embodiments, so that at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and details are not repeated herein. Wherein the needle assembly is a Touhy needle for epidural application or a Veress needle for peritoneal application; the medical staff can select according to the puncture site
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A puncture auxiliary component is used for assisting in positioning the tip of a needle component to reach an epidural area and is characterized by comprising an injection cylinder body and an outlet component;
the injection cylinder body comprises a piston movably connected with the inner wall thereof,
the piston divides the injection cylinder into a liquid storage space and a cavity which are not communicated with each other, and an elastic structure connected with the piston is arranged in the cavity;
the liquid outlet end of the injection cylinder is detachably connected with the outlet assembly, the flow cross-sectional area of the outlet assembly is variable, the outlet assembly is communicated with the liquid storage space, the liquid storage space is used for storing liquid, the elastic structure is used for storing energy, the pressure for discharging the liquid out of the injection cylinder through the outlet assembly is achieved, and the pressure is not more than 58 kpa;
the outlet assembly comprises a first joint, a flexible structure and a second joint which are communicated in sequence,
the first joint is detachably connected with the liquid outlet end; the second connector is used for connecting the needling component;
the inner diameter of the middle part of the flexible structure is larger than the inner diameters of the two ends of the flexible structure, and the deformation coefficient of the middle part of the flexible structure is larger than the deformation coefficients of the two ends of the flexible structure;
wherein when the tip reaches the epidural area, the liquid flows out of the injection cartridge.
2. The lancing aid assembly of claim 1, wherein an end of the injection barrel facing away from the outlet end has an opening, and wherein the operating lever of the injection barrel coupled to the piston extends out of the opening.
3. The lancing aid of claim 1, wherein the resilient assembly is disposed about an axis of the piston.
4. The lancing assist assembly of claim 1, wherein the resilient structure is a spring.
5. The lancing aid assembly of claim 1, wherein the injection barrel is transparent.
6. A lancing device comprising the lancing aid assembly of any one of claims 1-5 and a lancing assembly, said lancing assembly being releasably sealingly connected to said exit port assembly.
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| CN202011130042.9A CN112336423B (en) | 2020-10-20 | 2020-10-20 | Puncture auxiliary assembly and puncture device |
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| US6258063B1 (en) * | 1997-01-17 | 2001-07-10 | Roche Diagnostics Gmbh | Hypodermic injection system |
| CN2404489Y (en) * | 1999-12-28 | 2000-11-08 | 黄建平 | Negative pressure pneumothorax puncture needle |
| CN2443701Y (en) * | 2000-09-10 | 2001-08-22 | 刘建树 | Semi-automatic epidural puncturing needle |
| CN1997422A (en) * | 2003-09-12 | 2007-07-11 | 里程碑科学公司 | Drug infusion device with tissue identification using pressure sensing |
| JP2013013529A (en) * | 2011-07-04 | 2013-01-24 | National Institute Of Advanced Industrial Science & Technology | Device for inserting puncture needle |
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| CN106810583A (en) * | 2016-12-30 | 2017-06-09 | 珠海同源药业有限公司 | A kind of fructose sodium diphosphate compound and preparation method thereof |
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| CN112336423A (en) | 2021-02-09 |
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