Syringe for intra-arterial injections

FIELD: medicine.

SUBSTANCE: invention can be applied for intra-arterial injection of medicinal agent solutions within emergency cases. Syringe for intra-arterial injection consists of supported rod and piston inside of hollow transparent cylinder bottom of which is furnished with holed cap to connect to injection needle. Piston has transparent hollow open from side of free end by means of protruding capillary tube with piston and pusher. Pusher support is designed as red star-shaped disk and hollow balloon with elastic walls fixed on opposite wall of hollow.

EFFECT: provided accurate control of injection needle tip position inside of artery within the whole injection process.

1 dwg

 

The invention relates to medicine, in particular to the intensive care unit, and can be used for intra-arterial injection of solutions of medicines to patients in critical States.

Known syringe for intra-arterial injection containing the rod with the stop and the piston in the hollow transparent cylinder, the bottom of which has a tip with a hole for attaching the injection needle (SU 1792333 A3, AM 5/00, 30.01.1993 (3 sheets)).

The design of the device makes certain technology intraarterial administration. In the syringe trying to enter medicine according to the General scheme, choose a place for injection, palerud artery and fixed her index and middle fingers of the left hand, is treated with an antiseptic skin in the area of the proposed injection according to the General scheme, then take in the right hand injection needle pierce her skin between two fingers and injected the needle into the artery. Control being the end of the needle into the artery by leakage of red blood from the lumen of the needle and the oscillation of the needle synchronize pulse wave. Then connect the needle with the syringe with the drug, which is injected into an artery.

This design involves the identification of a hit slice of the injection needle into the lumen of the artery with a visual check of the expiration of red blood from the needle into the environment ignoreme is but with the visual observation of the oscillations of the injection needle, what is happening in rhythm with your heartbeat. Bleeding out is the equivalent of bloodletting, therefore, leads to the loss of blood and to decrease the magnitude of systemic and local arterial pressure arising from a breach of tightness and decompression of the cardiovascular system. The severity of these changes increases with the duration of the bleeding, so to reduce these negative consequences require prompt (hasty) attach the needle to the syringe. However, from this moment, the blood from the needle to the outside is stopped, and simultaneously, it becomes impossible to follow the oscillations of the needle, since the cannula is firmly connected with a syringe, which DAMPS the oscillations of the needle to extremely small values. In this regard, the device does not control the location of the end of the needle in the artery after you attach the needle to the syringe throughout the procedure, intra-arterial injection of the drug.

At the same time, immediately after you attach the needle to the syringe, there is a probability of accidental (negligent) and not visible to the eye of the needle from the lumen of the vessel. Introduction of a solution of the drug in these conditions leads to the fact that the medicine is not in the lumen of the artery, and the artery wall, or beyond. This reduces the efficiency and safety of neklanova the drug because the medicine for a long time is delayed in the soft tissues, before we get into the blood stream. Moreover, injection drug infiltration causes inflammation of the soft tissues, which is not always reversible. Sometimes the inflammation is becoming irreversible and ends postinjection necrotic tissue (including necrosis of the vessel wall).

These deficiencies make it difficult to perform intra-arterial injection may reduce the accuracy of control over the location of the end of the needle in the lumen of the artery, reducing the safety and efficacy of the procedure, intra-arterial injection of solutions of drugs.

The purpose of the invention is improving the efficiency and safety of the drug into the artery by increasing the accuracy of control of the location of the needle in it.

This objective is achieved in that the syringe for intra-arterial injection containing the rod with the stop and the piston in the hollow transparent cylinder, the bottom of which has a tip with a hole for attaching the injection needle, the piston has a transparent cavity, the open side of the free end by serving in the cavity of the capillary tube with the piston and plunger, the focus of which is made in the form of stellate red discs and hollow with elastic walls of the balloon, closed the prisoner on the opposite wall of the cavity.

The piston is made with a transparent air cavity, enables visual observation of what is happening inside the process reciprocating movement of the star-shaped disk which acts as the indicator of pulse waves in arteries. Red disk facilitates visual observation of him naked eye under normal lighting. Run disk stellate reduces windage disk as it moves in the air. The presence of holes in the cavity of the piston from the front side delivers her message with the cavity of the syringe and the penetration of a solution of a medicinal product into the holes when creating excess pressure in the cavity of the syringe. Using a capillary tube to move the solution medicines can reduce its internal volume, which can increase the step size of the piston inside the capillary tube, to the extent that the excess pressure inside the syringe that occur when the pressure of the finger on the stop of the piston of the syringe or in the case of pulsating blood pressure on the solution of a medicinal product inside the injection needle and inside the cavities of the syringe capillary tube in the cavity of the piston when the end of the injection needle in the lumen of the artery. The existence of this piston pusher with emphasis made in the form in which ecotonoha disc and balloon with elastic walls, allows him to perform a reciprocating motion due to the reversible compressibility of air and reversible stretching of the balloon in the case of pulsating pressure on him. When this balloon is placed between the plunger piston and the wall of the piston cavity acts as a spring. The magnitude of the back pressure arising inside the balloon is directly proportional to the step size of the piston and changes in pulse pressure variation to the beat of the pulse, providing axial stroke of the pusher with a red star drive inside the transparent cavity of the piston. Therefore, when the end of the injection needle in the lumen of the artery pulse pressure is transmitted according to the law of communicating vessels through the lumen of the injection needle into the cavity of the syringe, and from there into the cavity of the piston where the pressure change consistently through the capillary tube, the piston and the plunger is transmitted to the flexible wall of the balloon and its cavity. The presence of air inside the balloon provides compression and axial movement of the plunger with a red disc, pulse oscillation which testify about the end of the needle in the lumen of the artery.

The proposed design provides precision control of finding the end of the injection needle in the artery throughout the injection of the medicinal product, as to provide the characteristic indication since the introduction of the needle into the artery until the final completion of introduction of the solution of the drug in the artery.

Syringe for intra-arterial injection (see drawing) consists of a hollow transparent cylinder 1 with a bottom having a tip with a hole for attaching a needle, stem, with emphasis 2 and a piston 3 having a transparent cavity 4, the open side of the free end by serving her the capillary tube 5 with the piston 6 and the plunger 7, the focus of which is made in the form of a star-shaped disk 8 red and hollow with elastic walls of the balloon 9, fixed on the opposite wall of the cavity 10.

The syringe is used as follows. Reveal consumer shell and/or packing, of which grab the syringe, injection needle and a vial with a solution of a medicinal product, trying to enter the solution in the syringe according to the General scheme and attached to an injection syringe needle. Remove the air from the syringe. Choose a place on the body of a patient for suspected intra-arterial injection, palerud artery and fixed her index and middle fingers of one hand, then treated with an antiseptic skin in the area of the proposed injection according to the General scheme. Then take a syringe with an injection needle and a drug in the other hand, pierce the needle into the skin between two fingers and injected the needle into the lumen of the selected artery. When convinced of finding the end of the needle into the artery on the oscillation indicator what about the star-disk red located in the transparent cavity of the piston and monitor the presence of the pulsed oscillation of the indicator disc in the cavity of the piston throughout the injection. This drug is administered by periodic pressure on the piston.

The dimensions of the air cavity of the piston, the capillary tube, the piston pusher indicator pulse fluctuations of arterial pressure (red discs), the balloon, the pressure of air in it and the properties of the elastic material of the balloon, are selected in the device in the clinical range of positive values of blood pressure in the arteries of medium caliber to ensure the flat design of the syringe sufficient sensitivity and tangible reciprocating (axial vibrations of the indicator disc synchronize pulse wave detected by the naked eye of medical personnel in conditions of normal light. In addition, the reliability of the design of this device is achieved by considering the magnitude of negative pressure arising inside the cavity of the syringe by pulling the piston during the filling of the syringe drug.

The proposed syringe for intra-arterial injection allows highly effective and safe to enter the liquid pharmaceutical preparation is you in the lumen of the arteries without significant loss of blood, without breaching and decompression of the cardiovascular system and without reducing the size of the system and the local blood pressure. The use of the syringe allows to improve the accuracy of controlling the position of the injection needle in the lumen of the artery throughout injectable drug that reduces the possibility of accidental introduction of the drug by the arteries, thereby increasing the efficacy and safety of intra-arterial injection.

Syringe for intra-arterial injection containing the rod with the stop and the piston in the hollow transparent cylinder, the bottom of which has a tip with a hole for attaching the injection needle, wherein the piston has a transparent cavity, the open side of the free end by serving in the cavity of the capillary tube with the piston and plunger, the focus of which is made in the form of stellate red discs and hollow with elastic walls of the balloon fixed to the opposite wall of the cavity.



 

Same patents:

FIELD: medicinal equipment.

SUBSTANCE: device for manual metering of medical-purpose liquid matter has chamber for liquid matter to be metered provided with end opening, capturing handle, piston enclosed in chamber and provided with actuating member for user, and screw drive gadget. Screw gadget is disposed between actuating member and piston to provide longitudinal movement of piston and for making pressure onto dosed liquid matter. Screw gadget is capable of changing its shape to switch from working configuration, where micrometric application of piston is performed, to non-working configuration, where piston is capable of free moving. Screw gadget has external thread, relating to piston, and member provided with internal thread, made integral with handle. Handle can be elastic deformed due to lateral compression to switch screw gadget from its working configuration to its non-working one.

EFFECT: improved functional abilities; simplified design; ease at exploitation.

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Disposable syringe // 2307673

FIELD: medical equipment, in particular, construction of disposable syringes.

SUBSTANCE: disposable syringe has needle equipped with axial channel and fixed on casing incorporating piston and stem which are joined to one another through connector. Connector is made in the form of rod having length of 1.0-1.5 D, minimum thickness of 0.2-0.3 D and maximum thickness of 0.4-0.5 D. Rod is made in the form of arc of the circle having radius of 2-3 D. D is inner diameter of casing. Connector is designed to be broken upon advancement of stem.

EFFECT: enhanced reliability in operation due to eliminating the possibility of braking said connector during intake of medicinal preparation.

2 dwg

Single-use injector // 2300396

FIELD: medical equipment.

SUBSTANCE: single-use injector has container for medicinal preparation, needle connected with container, which needle is used for introduction of medicinal preparation through patient's skin, pusher for squeezing medicinal preparation from container, drive mechanism made for application of manual power to drive member for punching skin by needle and for squeezing medicinal preparation by pusher through needle, and spring mechanism for removal of needle into drive mechanism after the latter is used. Drive mechanism has rest. Rest is made for action between drive member and container during initial movement of drive member fro pressing needle into skin during mentioned initial movement. Rest is also made for de-blockage with increased manual force to go on with mentioned movement under effect of manual power to squeeze medicinal preparation.

EFFECT: reduced chance of squeezing of liquid before skin is punched by needle.

6 cl, 4 dwg

FIELD: medical equipment, in particular, portable injection means for dosed introduction of controlled amounts of medicinal drugs.

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EFFECT: compact construction, effective usage of piston for driving of ampoule plug to move within ampoule to position providing introduction of minimal dose in ampoule and full withdrawal of plug from ampoule for replacement thereof.

10 cl, 7 dwg

Injection apparatus // 2289429

FIELD: medical equipment, in particular, portable injection equipment for dosed introduction of controlled amounts of medication.

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EFFECT: compact construction, employment of piston for causing ampoule plug to move within ampoule to position for introducing minimal dose within ampoule, and provision for full withdrawal of plug from ampoule for replacement of said ampoule.

7 cl, 10 dwg

FIELD: medical engineering.

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15 cl, 5 dwg

FIELD: medical equipment.

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EFFECT: reduced cost; improved reliability; easiness at use.

28 cl, 22 dwg

FIELD: medical equipment; syringes.

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EFFECT: simplified design; improved reliability; comfort at use.

4 cl, 5 dwg

FIELD: medical equipment, in particular, injection devices adapted for injection of liquid substances.

SUBSTANCE: injection apparatus has casing, piston stem, driving device for enabling feeding motion, dose setting member, progressive motion restricting device, and rotation preventing unit. Casing has reservoir for liquid substance. Piston stem is positioned for performing feeding stroke in working stroke direction axially of progressive motion direction for feeding dose of liquid substance. Dose setting member is coupled to piston stem for causing rotational dosing motion by dose setting member and piston stem around axis of progressive motion relative to each other, progressive motion causing axial progressive dosing motion of dose setting member relative to piston stem and casing. When dose setting member is in its axial end position, progressive motion restricting device is arranged opposite thereto and is axially faced. When in its end position, rotation preventing unit allows rotational dosing motion in first direction of rotation and prevents rotational dosing motion in second direction to exclude application of axial depressing force to said device upon rotational dosing motion. Reservoir module for injection apparatus has front body section, piston, piston stem, drive, dose setting member, progressive motion restricting device, and rotation preventing unit. Reservoir for liquid substance is disposed in front section. Piston is disposed within reservoir for moving in operating stroke direction toward reservoir discharge opening for feeding of substance. Piston stem acts upon said piston. Drive is connected to piston stem for moving thereof in operating stroke direction. Dose setting member and piston stem are connected to one another for controlling each other in operating stroke direction. Relative rotational dosing motion of dose setting member and piston stem around axis of progressive motion influences upon axial progressive dosing motion of dose setting member relative to piston stem and front body section. Said device restricts joint motion of piston stem and dose setting member in operating stroke direction, when the latter adjoins to said device in its front axial end position.

EFFECT: increased dosing precision.

18 cl, 22 dwg

FIELD: medical equipment, in particular, connection for injector consisting of at least two body sections.

SUBSTANCE: injection apparatus has front and rear body sections, piston stem, dose setting member, and dosing and driving device. Front section has reservoir for substance. Piston stem is positioned in at least one of sections for enabling feeding motion to feed selected dose of substance. Dose setting member is positioned for dosing motion relative to piston stem for selecting dose of substance. Dosing and driving device is positioned for rotation around axis of rotation and for progressive motion relative to front section. Upon connecting of sections, said device is joined with piston stem and dose setting member so that rotational motion of said device causes dosing motion of dose setting member, while progressive motion of said device causes feeding motion of piston stem. At least one guide provided on one of sections and at least one catching member provided on other section are adapted to define linear guide upon connection of said body sections. Sections may move one relative to the other to end position of connection without possibility of rotating relative to one another around axis of rotation. At least one catching member is narrowing in axial and, preferably, radial direction at end facing one of sections to facilitate aligning of sections. Reservoir module has front body section of said injection apparatus, piston, dose setting member, and piston stem. Front section has reservoir for substance. Piston is positioned within reservoir for moving in operating stroke direction toward reservoir discharge opening. Dose setting member is disposed in front section for effecting dosing and feeding motions. Piston stem is connected to dose feeding member and held in front section for preventing motion of piston stem in direction opposite to operating stroke direction. Dosing motion does not cause motion of piston stem in operating stroke direction. At least one of axial guide or catching member is provided on front section surface for defining linear guide and, upon connection of sections, for moving of front section on rear section to end position of connection, said sections being fixed from rotation relative to one another. Dose setting member is adapted for detachable engagement with front section in predetermined angular positions. When in engaged position, it is capable of moving in axial and rectilinear directions.

EFFECT: enhanced reliability, improved safety, simplified and convenient usage.

25 cl, 22 dwg

FIELD: medicine.

SUBSTANCE: method involves making sclera pierce with injection needle 3-4 mm far from limb and then proceeding along vitreous body periphery towards epiretinal space. Collalysinum is introduced through the injection needle at a single dose of 2-10 CU directly into fibrous tissue or pouring over it. Severe fibrous transformations being the case, Collalysinum is introduced through needle bent at an angle of 30-40° with epiretinal membrane being mechanically separated or schwartotomy being concurrently done with needle tip.

EFFECT: enhanced effectiveness of treatment; minimized vitreous body injury; increased bioavailability of the preparation; accelerated treatment course.

4 dwg

FIELD: medicine; medical engineering.

SUBSTANCE: method involves setting syringe body in horizontal position with additional end piece turned upward. Sealing caps are taken off from the principal and additional end pieces. Space is opened between syringe body and sealing member on the piston. The piston is moved into utmost position near tip for introducing gas. Additional rod is returned to initial position and syringe body is set in vertical position with the end piece turned down. Dosed volume of liquid drug is taken to graduation line. The principal and additional end pieces are tightly closed with cap. The syringe body is set in vertical position with the end piece turned down before usage. Space is opened between syringe body and sealing member on the piston by rotating the additional rod. The piston is displaced to dosed mark taking into account the line connecting the principal and additional graduation line. The additional rod is returned to the initial position. The liquid drug is mixed w the gas substance during 15 min. Then, sealing cap is taken off from the end piece. Needle is put on. Gas substance not mixed with the liquid drug is removed by displacing piston to dosed mark along liquid drug graduation mark.

EFFECT: reduced risk of traumatic complications.

3 cl, 2 dwg

FIELD: medicine; surgery, nephrology; neurology; clinical pharmacology.

SUBSTANCE: method can be used at injection introductions of medicinal aids into deep layers of soft tissues of lumbar area. Ultrasonic detector is applied to selected area. Area to be found in depth of tissues is detected by means of device on the screen. Different areas of skin are subject to periodical pressing by finger and appearance of wave-shaped reversible changes in skin is observed on screen under point of pressing. Part of skin is marked for injection introduction from which part the deformation wave reaches selected area more precise. Distance from skin to the area is measured and needle is introduced for the depth. 1-1,5 ml of solution is pressed out of syringe. Correctness of introduction is estimated from ultrasonic visualization of localization point which appears in tissues of medicinal infiltrate. Procedure is repeated till correct introduction is performed and that the required medicinal solutions are introduced.

EFFECT: improved precision; prevention of complications.

1 ex

FIELD: medicine, in particular, equipment for injections and for taking blood or other liquids from organism, which may be also used in laboratories and enterprises in different branches of industry requiring usage of syringes for injecting liquids.

SUBSTANCE: syringe has first part made in the form of cylinder and equipped with first front end including inlet and outlet for liquid and second open end, and second part comprising stem equipped at its front end with piston and at its rear end stop, said second part being positioned for moving between first position wherein stem piston is located at site proximate front end of first part, and second position wherein stem piston is located at site distal from front end of first part. Second part also comprises pusher whose rear end has supporting surface adapted for applying pressure in first axial direction to move second part from second position to first position. First part has at its second end supporting member protruding transverse to first part and made integral therewith. Supporting member has first supporting surface for applying pressure in second axial direction opposite to first axial direction for moving second part from second position to first position, and rear supporting surface for applying pressure in said first axial direction to move second part from first position to second position. Pusher has at its front end two protruding members joined to stem through connecting links so as to define window restricted with stem stop, supporting member of first part, protruding members and rear end of pusher. Protruding members at front end of pusher are terminated with two supporting surfaces for applying pressure in second axial direction to move second part from first position to second position. First part has at least two longitudinal grooves extending from second end of first part to front end and adapted for accommodation of connecting links of pusher. Supporting member of first part has through opening shaped to provide for axial passage of protruding members.

EFFECT: convenient use owing to providing suction and liquid introduction steps for single operation.

17 cl, 7 dwg

Syringe-container // 2264231

FIELD: medical equipment, in particular, devices for injections, formed as syringes containing medicinal substances.

SUBSTANCE: apparatus is formed as syringe with hermetically sealed reservoirs containing different substances, piston mechanism including piston chamber, piston and piston stem. Chamber clearance with continuous internal surface is formed as successively arranged reservoirs or sectors with different diameters or sections, with one of reservoirs being formed as piston cylinder. Piston chambers are hermetically separated within piston chamber clearance further than line of transition of smaller diameter or other section by movable device.

EFFECT: simplified construction.

2 cl, 5 dwg

Safety syringe // 2255768

FIELD: medicinal equipment, in particular, safety syringes.

SUBSTANCE: safety syringe has cylinder with axial through opening, retainer provided within front end of cylinder, piston, needle hub, and needle. Piston positioned for sliding inside cylinder is equipped with sealing rubber member, head and flange disposed on piston in opposed relation to head. Needle hub is detachably engaged with cylinder and is provided with axial opening corresponding to that of cylinder and communicated therewith, and feeding opening adapted for communication with axial openings of needle hub and cylinder and for providing insertion of piston head. Needle has sleeve engaged with front head part of needle hub, and metal pipe engaged with sleeve. Piston has neck portion defined at its front end and arranged so that rubber sealing member tightly adheres thereto, and spatially inclined teeth. Head is made conical. Needle hub has conical front end with protrusions mating with cylinder retaining device upon rotation of cylinder. Slots are provided for engagement with inclined teeth. Bead provided in peripheral portion of feeding opening is mating with piston conical head. Protrusions are released from finger clamps upon rotation, when inclined teeth are engaged with slots.

EFFECT: simplified construction and convenient use.

4 cl, 12 dwg

FIELD: medical engineering.

SUBSTANCE: device has sealed reservoirs, containing substances, and piston mechanism, having piston cylinder, piston and piston rod. Device for moving liquid between the reservoirs is mounted in piston cylinder lumen. The device has separating piston and compression unit arranged in series. The unit designed as casing or carcass is mounted in projection of its external cylindrical part along the perimeter. Hollow internal lumen of has exit to piston projection inward from its external perimeter. The separating piston makes two connections with the piston cylinder and compression unit at the same time. The separating piston is movable into compression unit lumen with compression or change in shape taking place at the same time. The compression unit allows to make communication between reservoirs.

EFFECT: simplified design.

5 cl, 8 dwg

The invention relates to medical equipment, namely, devices for injection in a syringe with drug substance

Syringe // 2197278
The invention relates to medical engineering, in particular to injection devices single use

FIELD: medical engineering.

SUBSTANCE: device has sealed reservoirs, containing substances, and piston mechanism, having piston cylinder, piston and piston rod. Device for moving liquid between the reservoirs is mounted in piston cylinder lumen. The device has separating piston and compression unit arranged in series. The unit designed as casing or carcass is mounted in projection of its external cylindrical part along the perimeter. Hollow internal lumen of has exit to piston projection inward from its external perimeter. The separating piston makes two connections with the piston cylinder and compression unit at the same time. The separating piston is movable into compression unit lumen with compression or change in shape taking place at the same time. The compression unit allows to make communication between reservoirs.

EFFECT: simplified design.

5 cl, 8 dwg

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