Medical injection system
By controlling the injection force and needle depth through a pneumatic piston system, the problem of precise control during injection in existing medical syringes is solved, resulting in a compact design and a comfortable user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BECTON DICKINSON FRANCE SAS
- Filing Date
- 2019-04-08
- Publication Date
- 2026-06-05
AI Technical Summary
Existing medical syringes are difficult to control precisely during injection, and they also take up a lot of space, have an unsightly appearance, and affect the user experience.
It employs a pneumatic piston system, which is connected to the container through a gas compartment. It uses gas pressure to inject drugs, and the piston moves in the proximal direction to control the injection force and needle depth. The design is compact and easy to operate.
It enables a smooth and comfortable injection procedure, reduces sudden movements, saves storage space, and reduces stress on patients and medical staff.
Smart Images
Figure CN122141071A_ABST
Abstract
Description
[0001] This application is a divisional application of the application with application number 2019800229011, application date of April 8, 2019, and invention title "Medical Injection System". Technical Field
[0002] This invention relates to a medical injection system for single-handed injection. Background Technology
[0003] Medical syringes are widely used for delivering parenteral drugs into humans or animals, for example, via intravenous, intramuscular, or subcutaneous injection. A typical medical syringe includes: an injection needle for puncturing the skin and delivering the drug to the patient; a syringe barrel for containing the drug; a stopper that travels through the syringe barrel to force the drug through the injection needle; and a plunger rod connected to the stopper to transmit force to the stopper.
[0004] When using this existing medical syringe, the injection pressure is directly determined by the force applied to the plunger by the healthcare worker's thumb. This injection requires precise control of the thrust to avoid any jerking during the injection. Simultaneously, the syringe barrel must be firmly gripped with two other fingers to control the depth of insertion into the patient. Therefore, effective and painless injections using existing medical syringes are difficult and require experience.
[0005] Furthermore, syringe barrels, needles, and plungers are long components that require large-volume packaging, which wastes pharmacy storage space. Finally, some people are intimidated by the typical appearance of medical syringes and may feel fear and stress upon seeing certain designs.
[0006] Therefore, there is a need for a medical injection system that can provide safe and comfortable injections for healthcare workers and patients. Additionally, there is a need for a medical injection system that is suitable for saving storage space and reducing patient stress. Summary of the Invention
[0007] This objective is achieved by a medical injection system suitable for single-handed injection, the medical injection device comprising:
[0008] - A gas compartment configured to contain gas, the gas compartment including a piston,
[0009] - A container designed to contain a drug ingredient, the container having a fluid outlet configured to receive an injection needle.
[0010] The piston is configured to move proximally between a distal position defining a first volume of the gas compartment and a proximal position defining a second volume of the gas compartment, the second volume being smaller than the first volume, and wherein the gas compartment is configured to communicate with the container gas, thereby forcing the drug component through the fluid outlet as the piston moves proximally.
[0011] Therefore, when the medication is filled into the container, the proximal movement of the piston performs gas delivery from the gas compartment to the container, thereby injecting the medication into the patient. In this way, injection is performed by the pneumatic action generated by the gas delivery.
[0012] The piston can move in a proximal direction, which is opposite to the injection direction. This reduces or eliminates any sudden movement and ensures a smooth and comfortable injection experience. Finally, the piston prevents any stopper from being in a sliding engagement within the container, which prevents any compatibility issues between the drug ingredients and the lubricant typically required by such a stopper.
[0013] Preferably, the gas compartment further includes a housing, and the piston is configured to move relative to the housing.
[0014] Preferably, the container is attached to the gas compartment, for example, to the housing. This allows for the design of smaller and more convenient medical injection systems that can be easily used by healthcare professionals.
[0015] Preferably, at least a portion of the piston is located on the distal side of the container, at least in a distal position. This makes it possible to manufacture more compact and convenient medical injection systems.
[0016] Preferably, the piston includes at least one finger-shaped flange configured to be pushed proximally by a user. The finger-shaped flange is preferably located distally on the container.
[0017] In a preferred embodiment, the container is located within a gas compartment, which enables a compact, one-piece design that does not have the typical appearance of a medical syringe.
[0018] Preferably, the gas compartments are arranged coaxially and around the container. In other words, the container is contained and surrounded by the gas compartments, which allows for a very compact design, enabling compact packaging to save storage space. Additionally, this compact medical injection system is easier for healthcare personnel to operate. For example, the longitudinal axis of symmetry of the container is collinear with the longitudinal axis of symmetry of the gas compartments.
[0019] For example, the container has a proximal end and a distal end, and the fluid outlet is located at the distal end.
[0020] Preferably, the container includes a proximal portion defining an operating surface adapted to receive a healthcare worker's thumb, and the piston is provided with at least one finger-like flange adapted to receive at least another finger of the healthcare worker. This allows for easy control of the needle depth inserted during puncture of the patient's skin by controlling the thrust applied by the thumb. Additionally, the injection can be performed by squeezing the finger-like flange in the proximal direction and therefore in the direction opposite to the injection direction.
[0021] This ensures a user-friendly injection procedure and limits or prevents any changes in the depth of needle insertion during the injection process, thus enabling safe and comfortable injections. For example, two or three finger-shaped flanges can be provided, or a single finger-shaped flange can accommodate two or three different fingers.
[0022] Preferably, a sealing component is provided between the piston and the housing, which can improve the airtightness of the gas compartment. The sealing component can be an O-ring.
[0023] In embodiments where the gas compartments are arranged coaxially around the container, when an injection needle is provided, the proximal movement of the piston may require sliding motion on the distal portion of the container (e.g., the neck) or on the injection needle. In this case, an additional sealing element can be provided between the piston and the container or the injection needle to improve the airtightness of the gas compartments.
[0024] Preferably, the gas compartment is in gas communication with the proximal portion of the container, which allows for optimal gas delivery into the container. More preferably, the gas compartment is in gas communication only with the proximal portion of the container.
[0025] For example, a gas connection interface is provided between the gas compartment and the container. The gas connection interface preferably includes at least one orifice allowing gas to flow. This gas connection interface may be the only gas connection interface for the gas compartment, and / or may include at least two or more orifices.
[0026] Preferably, the gas connection interface is configured to prevent any liquid from flowing from the container into the gas compartment. This avoids wasting valuable drug components and ensures that a constant amount of drug component is injected into the patient.
[0027] Preferably, the gas communication interface and, for example, the at least one orifice, include a valve component, a filter component, or a ruptureable membrane to prevent any liquid from being delivered from the container to the piston.
[0028] Preferably, the proximal portion of the container and the proximal end of the shell include a filling port for access to the interior of the container.
[0029] In a more preferred embodiment of the invention, the distal portion of the container is provided with stacked injection needles, which simplifies injection by providing healthcare personnel with a ready-to-use medical injection system.
[0030] Another aspect of the present invention relates to a medical injection system suitable for single-handed injection, the medical injection device comprising:
[0031] A cylindrical container designed to contain a drug component, the cylindrical container having a proximal portion and a distal portion, the distal portion being provided with a fluid outlet configured to receive an injection needle.
[0032] • A cylindrical gas compartment, designed to contain gas and communicate with the gas in the container.
[0033] The gas compartment has a distal end equipped with a piston configured to move from a distal position to a proximal position, at which gas is delivered from the gas compartment to the container.
[0034] For example, the piston defines a first volume of the gas compartment in the distal position and a second volume of the gas compartment in the proximal position.
[0035] Preferably, the container and the gas compartment are fixed to each other and can each have longitudinal axes that are parallel to each other, that is, the container and the gas compartment are adjacent to each other and aligned.
[0036] The final aspect of the invention is a method for using a medical injection system according to the first or second aspect, wherein a medical professional grips the medical injection system by placing a thumb on an operating surface and another finger on a finger-like flange.
[0037] Preferably, the puncture is performed by placing the injection needle of the medical injection system on the patient's skin and applying pressure to the operating surface with the thumb.
[0038] Preferably, the injection is performed by squeezing or pinching another finger against the thumb, thereby moving the piston of the gas compartment from a distal position to a proximal position. Attached Figure Description
[0039] Other advantages and preferred embodiments of the invention will become apparent from the following detailed description and accompanying drawings, wherein:
[0040] Figure 1 This is a cross-sectional view of the medical injection system according to the present invention.
[0041] Figure 2 It is based on Figure 1 A three-dimensional view of a medical injection system.
[0042] Figure 3It is based on Figure 1 A cross-sectional view of a medical injection system during injection.
[0043] Figure 4 It is based on Figure 1 A cross-sectional view of a medical injection system after an injection has been administered. Detailed Implementation
[0044] The medical injection system of the present invention is intended for parenteral drug administration, preferably by a healthcare professional using only one hand. Furthermore, the medical injection system of the present invention is preferably pre-filled; that is, the medical injection system is manufactured first and then filled with the drug components before being transported to a pharmacy. Therefore, in the medical injection system, the drug components are already available to the healthcare professional and ready for injection, which minimizes the operations performed by the healthcare professional prior to the injection procedure, thereby reducing the risk of accidents or misuse.
[0045] Thus, in this application, the distal direction must be understood as the injection direction with reference to a medical injection system, while the proximal direction is the opposite direction, i.e., the direction toward the healthcare worker's hand. Furthermore, the drug ingredient must be understood as all types of injectable drug ingredients suitable for therapeutic, cosmetic, preventative, or diagnostic applications.
[0046] Now refer to Figure 1 The medical injection system 100 according to the invention includes a container 110 having a back or proximal portion 111 and a neck or distal portion 112. The container is preferably cylindrical. An injection needle 120 is attached to or stacked to the distal portion 112 of the container 110. The container is designed to contain a drug component to be injected into a patient via the injection needle 120. The container may comprise any material suitable for medical applications, such as glass or plastic, such as polypropylene or polycarbonate.
[0047] Container 110 is preferably inserted into gas compartment 130. The gas compartment defines a cavity intended to contain gas. In this example, gas compartment 130 includes a piston 140 and a housing 150. Piston 140 is configured to move relative to housing 150 to reduce the volume of gas compartment 130. In this example, piston 140 is configured to travel over a distal portion 112 of container 110 and slide into or into housing 150 of the gas compartment to apply pressure to the gas contained in gas compartment 130. Gas compartment 130 may include glass, metals such as aluminum, and rigid plastics such as polycarbonate or polypropylene.
[0048] The housing 150 surrounds the container 110, except for the distal portion 112. The housing 150 includes a proximal end 151 that overlaps with the proximal portion 111 of the container 110 and an open distal end 152 that receives the proximal end 141 of the piston 140. The proximal end 151 includes a radial edge that allows the medical injection system to be placed in a standard package (such as a nest).
[0049] Thus, the gas compartment 130 is located around and parallel to the container 110: the longitudinal axis of the container 110 is collinear with the longitudinal axis of the piston 140 of the gas compartment 130 and the longitudinal axis of the housing 150. Figure 1 In this embodiment, these longitudinal axes are the axes of symmetry between the container 110 and the gas compartment 130. Thus, the gas compartment 130 is coaxial or concentric with the container 110 and surrounds the container 110.
[0050] The hermetic engagement between container 110, piston 140, and housing 150 allows piston 140 to move to optimally pressurize the gas contained in gas compartment 130. This gas can be air or a non-reactive gas such as nitrogen or argon. For example, piston 140 may include a first O-ring (not shown) on its proximal end 141 to ensure a hermetic engagement with the inner surface of housing 150. A second O-ring may be provided on the distal end 142 of piston 140 to ensure a hermetic engagement with the distal portion 112 of container 110 and / or with injection needle 120.
[0051] Therefore, relative to the housing 150, the piston 140 can adopt... Figure 1-3 The distal position shown has the largest internal volume (or first volume) of the gas compartment 130, and no pressure is applied to the gas contained in the gas compartment 130. Furthermore, the piston 140 may also employ... Figure 4 The proximal position shown is such that the piston can slide completely into the housing 150, and the internal volume (or second volume) of the gas compartment 130 is minimized. Thus, pressure is applied to the gas contained in the gas compartment 130 at the proximal position of the gas compartment 130, and the gas can be pushed or transported to the outside of the gas compartment 130.
[0052] Additionally, the interior of the gas compartment 130 can be in gas communication with the proximal portion 111 of the container 110. In fact, the proximal portion 111 of the container 110 includes a gas communication interface with at least one, preferably several, orifices 113, which allow gas contained in the gas compartment 130 to be delivered to the container 110. Therefore, when the piston 140 moves from the distal position to the proximal position, gas can flow from the gas compartment 130 into the container 110, and the gas compartment 130 may not have other gas communication interfaces.
[0053] Specifically, the gas connection interface can be configured to prevent any liquid from being transferred from container 110 to gas compartment 130. For example, orifice 113 can have a small diameter, such as a few millimeters or less, or each orifice can be provided with a valve component, filter component, or ruptureable membrane.
[0054] The proximal portion 111 of container 110 and the proximal end 151 of housing 150 include a filling hole 155 that provides access to the interior of container 110 for filling with a pharmaceutical ingredient. The filling hole 155 is intended to be sealed or closed by a cap (not shown) attached to housing 150 and / or container 110 in a removable or non-removable manner. Alternatively, only the proximal portion 111 of container 110 may include the filling hole, and the proximal end 151 of housing 150 may serve as a cap.
[0055] Now consider Figure 2 A general three-dimensional view of a medical injection system 100 according to the invention is shown. The container 110 is hidden and nested within the gas compartment 130, and is therefore not visible, but two finger-like flanges 160 on the distal end 142 of the piston 140 are visible. These finger-like flanges include distal surfaces intended to contact the two forehand fingers (e.g., index and middle fingers) of a healthcare professional. Additionally, the proximal surface of the proximal end 151 of the housing 150 defines an operating surface 153 intended to receive the thumb of the same hand of the healthcare professional.
[0056] This gripping or holding method of the medical injection system 100 allows healthcare professionals to perform punctures on the patient's skin using their thumb, which allows for precise control of the needle insertion depth. Additionally, the distal portion 111 of the container surrounding a portion of the injection needle 120 can serve as a stop for the puncture operation and can be useful for precisely controlling the needle insertion depth.
[0057] Injection can be performed by squeezing with the forefinger fingers towards the thumb (i.e., in the proximal direction), which is natural and comfortable for healthcare workers. Furthermore, this squeezing motion helps prevent any changes in the depth of needle insertion, thus simplifying the injection of medication into the patient and preventing any deviation in needle depth.
[0058] Now, in operation, and referring to Figure 3 and Figure 4 The drug ingredient 170 is contained in container 110, and the medical personnel grasp the medical injection system 100 as previously described. The medical personnel first perform a skin puncture operation on the patient, i.e., inserting the injection needle 120 into the patient's body. Then, the medical personnel perform the squeezing motion required for the injection operation. The injection operation is preferably performed while the medical injection system 100 is held vertically.
[0059] By using the finger-shaped flange 160 (in) Figure 3-4 (Not visible in the middle) Pressing towards the proximal end 151 of the housing 150, i.e., towards the thumb of a medical worker, the piston 140 from... Figure 3 The distal position shown slides to Figure 4 The proximal position shown is towards the proximal end 151 of the housing 150. During this movement, the internal volume of the cavity defined by the gas compartment 130 decreases, and pressure is applied to the gas contained in the gas compartment 130, such as... Figure 3 As indicated by the horizontal arrow pointing to the near side, gas is forced into container 110 through the gas connection port and orifice 113, as shown. Figure 3 As shown by the arrow pointing horizontally.
[0060] In this way, the delivered gas applies pressure to the drug component 170, such as... Figure 3 As indicated by the horizontal arrow pointing to the distal end, this forces the drug component through the injection needle 120, and the drug component enters the proximal end 121 of the injection needle 120 and is discharged into the patient's body through the distal end 122.
[0061] At the end of the injection process, that is: Figure 4 In the proximal position of the movable portion 140 shown, the distal end 142 of the piston 140 is near or in contact with the container 110, while the proximal end 141 of the piston 140 is near or in contact with the proximal end 151 of the housing 150.
[0062] When force is transmitted through the compressed gas, the gas compartment 130 allows the hand movements of the medical personnel administering the injection to be separated from the injection of the drug component. Furthermore, the direction of the hand movements required for the injection is opposite to the injection direction, i.e., opposite to the distal direction. Therefore, only limited involvement of the injection movement is required, and the piston 140 can simply slide from a distal position to a proximal position into the housing, and the gas delivery contained in the gas compartment 130 prevents or at least reduces any sudden movements.
[0063] Furthermore, the medical injection system 100 is intuitive to grip and allows for easy control of the needle insertion depth by using the healthcare worker's thumb to control the pressure applied to the proximal surface of the proximal end 151 of the housing 150. The hand positions allowed by the medical injection system 100 of the present invention also reduce any pain or fatigue in the healthcare worker's hands (e.g., when performing multiple injections per day).
[0064] Finally, the gas compartment 130 is arranged coaxially around the container 110, which enables the compact design of the medical injection system 100 while avoiding any long and large packaging.
[0065] From an industrial perspective, container 110 can be attached to injection needle 120 and housing 150, and sterilized by known methods such as steam or ethylene oxide. Due to the radial edge of the proximal end 151, this sub-assembly can be delivered toward a filling route into, for example, a standard nesting device. In the filling route, medication is filled into container 110 through filling hole 155, and then piston 140 is attached to housing 150. Subsequently, the filled and assembled medical injection system 100 can be placed in blister packs before being delivered to pharmacies and hospitals.
[0066] Medical injection systems may also include a passive needle safety system (not shown) for securing the injection needle after the injection procedure to prevent any unwanted needle puncture. For example, a gas compartment may include a spring located between the housing and the piston, or between the container and the piston, to allow the piston to... Figure 4 The piston is positioned from the proximal position to the final safe position, where it is located around the distal end of the injection needle to conceal and secure the needle. For example, the safe position can be obtained from a locking device configured to lock the piston in a position away from the distal position. These locking devices may include snap-fit features such as pins and rails.
[0067] Alternatively or in combination, a medical injection system may include an actuation system (not shown) that requires an actuating movement to allow injection. This actuating movement may be, for example, the removal of a blocking element or rotation of the piston relative to the housing. Alternatively, the container and piston may be fixed in rotation, and the housing may include a plug that blocks the orifice of the container. Rotational movement of the piston relative to the housing may thus allow the orifice to be opened for injection.
[0068] Although the invention has been described and illustrated in detail, it should be clearly understood that the invention is by way of illustration and example only and not by way of limitation, and the scope of the invention is limited only by the terminology of the appended claims.
[0069] Specifically, the container can be fixed to the outer surface of the gas compartment's housing. In this embodiment (not shown), the container and piston can be parallel: their longitudinal axes can be parallel to each other. Additionally, the piston can slide onto the housing.
[0070] Furthermore, the gas compartment can be inserted into the container, so in this embodiment, the container surrounds the gas compartment.
[0071] The shape and related dimensions of the different components of the medical injection system 100 can then be varied according to each specific volume and each specific application. The size, diameter, and number of the finger flanges 160 can be selected among all possible variations. The volume of the uncompressible gas compartment 130 is not limited, but is preferably similar to the volume of the drug component to be injected.
Claims
1. A medical injection system (100) suitable for single-handed injection, said medical injection system (100) comprising: A gas compartment (130) configured to contain gas, the gas compartment (130) including a piston (140) and a housing (150), wherein the piston (140) is configured to move relative to the housing (150); A container (110) designed to contain a drug ingredient (170), the container (110) having a fluid outlet configured to receive an injection needle (120); Its features are, The piston (140) is configured to move proximally in a direction opposite to the injection direction between a distal position of a first volume defining a gas chamber (130) and a proximal position of a second volume defining a gas chamber (130), the second volume being smaller than the first volume. Furthermore, the gas compartment (130) is configured to be in gas communication with the container (110) to force the drug component (170) through the fluid outlet as the piston (140) moves toward the proximal side.
2. The medical injection system (100) according to the preceding claims, wherein the container (110) is attached to the gas compartment (130).
3. The medical injection system (100) according to any one of the preceding claims, wherein, At least a portion of the piston (140) is located on the far side of the container (110), at least at the far side position.
4. The medical injection system (100) according to any one of the preceding claims, wherein, The container (110) is located inside the gas compartment (130).
5. The medical injection system (100) according to any one of the preceding claims, wherein, The gas compartment (130) is arranged coaxially and around the container (110).
6. The medical injection system (100) according to any one of the preceding claims, wherein, The longitudinal axis of symmetry of the container (110) is collinear with the longitudinal axis of symmetry of the gas compartment (130).
7. The medical injection system (100) according to any one of the preceding claims, wherein, The container (110) includes a proximal portion (111) defining an operating surface (153) adapted to receive a healthcare worker's thumb, and wherein the piston (140) is provided with at least one finger-shaped flange (160) adapted to receive at least one other finger of the healthcare worker.
8. The medical injection system (100) according to any one of the preceding claims, wherein, A sealing component is provided between the piston (140) and the housing (150).
9. The medical injection system (100) according to any one of the preceding claims, wherein, The gas compartment (130) is configured to be in gas communication with the proximal portion (111) of the container (110).
10. The medical injection system (100) according to the preceding claim, wherein, A gas communication interface is provided between the piston (130) and the container (110), and the gas communication interface includes at least one orifice (113).
11. The medical injection system (100) according to the preceding claim, wherein, The gas communication interface is configured to prevent any liquid from being transferred from the container (110) to the gas compartment (130).
12. The medical injection system (100) according to claim 10 or 11, wherein, The at least one orifice (113) includes a valve component, a filter component, or a ruptureable membrane.
13. The medical injection system (100) according to any one of the preceding claims, wherein, The proximal portion (111) of the container (110) and the proximal end (151) of the gas compartment (130) include a filling hole (155) that provides access to the interior of the container (110).
14. The medical injection system (100) according to any one of the preceding claims, wherein, The distal portion (112) of the container (110) is provided with stacked injection needles (120).