Syringe

 

(57) Abstract:

The invention is intended for use in medicine. The syringe 1 includes a cylinder 2 with a reciprocating piston 6 having a channel 11 for the fluid between the ends of the piston 6. The outer end of the piston 6 is connected with the needle. Open the ends of the tubular shell 40 with needle and hand ends, made of sliding along the cylinder 2 and is attached to the piston 6 for placement around a cylinder 2 when the piston 6 is at hand end of the cylinder 2. The piston 6 can selectively detach from the shell 40 and to move after such a disconnect with the extrusion cylinder 2 from the shell 40 to selectively pull the needle means 3 attached to the piston 6, the inside of the shell 40. The technical result of the invention is to simplify the construction of the syringe. 13 C.p. f-crystals, 15 ill.

The present invention concerns a syringe, and more specifically the type of syringe, known as the "safe" syringe.

With the growing awareness of the possibility of infection from a needle used syringe was proposed many devices to protect people from contact with used needles syringe.

Among these devices are known syringes, which enable time is also suggested that a variety of protective devices, to protect the used needle from accidental contact.

One class of such devices includes a shell that is placed over the needle. Examples of such devices are described in U.S. patent 5106379 in which the proposed wrapper around a cylinder of a syringe, which can drop to move forward under the bias tension of the spring and positioned around the needle in a locked position. Another such device in the form of shell proposed in the application IN the patent cooperation Treaty N 90/07349, which makes it possible to draw the needle into the sheath, not particularly protect the needle when reusing, usually in the selection of blood by intramuscular injection or by searching the vein with intravenous injection.

Another example of the device shell proposed in the French patent N 90 02944. The last device wrapper serves to retract the needle into the sheath at the end of the movement of the shell. It was proposed many mechanisms for attaching the needle to the end of the shell.

Another example of the outer shell is proposed in U.S. patent 4915699, which is considered the outer casing around a much shorter cylinder, which can slide in the shell back when were very high between the cylinder and the shell, mainly the movement of the cylinder within the outer shell.

Another variant of this system consists of a needle system is pushed into a hollow shell with the goal circle needle. An example of this is the device proposed in U.S. patent N 4927414, which makes it possible to draw the needle into a hollow shell.

The mechanism for accomplishing this is extremely difficult and expensive to manufacture. In the patent the patent cooperation Treaty N IN 91/10461 also proposed a similar device, which is a trigger on the end of the shell, which causes the needle and its mounting to separate and move the camera inside the hollow shell.

The overall level of these decisions is complex mechanisms and a plurality of parts. Require many forms and multi-step Assembly process, which greatly affects their value. It is believed that most such widely known safe syringes are used in disadvantaged areas of the world and that the cost of such syringes in such environments is critical. If you know of safe syringes could be produced at the price of lesser compared to the cost of the cha to develop the syringe, which would be the aforementioned difficulties.

According to the present invention proposes a syringe comprising a cylinder having a needle and manual end; a piston having a working inner and outer ends and which moves back and forth in the cylinder outer end facing the needle and from the cylinder, forming a passage for fluid between the ends of the piston, and this passage may be connected to the outer end of the needle; open to all essentially tubular sheath having a needle and manual end and moving on top of the cylinder, in addition, the shell is attached to the piston to extrude around the cylinder when the piston is at hand end of the cylinder; the piston may be selectively detached from the shell and can move after such disconnection and take back the cylinder of the shell for selectively pulling the needles attached to the piston when used in the shell.

A characteristic feature of the invention is hand end of the shell for placement on the cylinder around the placement of the piston when the piston is attached to the shell in the process, and the manual end of the shell to accommodate paradigalla.

Preferably the piston jet it back-and-forth motion, and that has a means of attachment to its outer end to ensure attachment of the piston to the shell, and fastening means includes clamping means with the switch acting inside the shell to release the piston system from the shell.

In addition, preferably, the cylinder has a head end for exposure to the switch during operation, when the cylinder is fully driven into the casing, and clamping means is displaced radially outward and pressed against the radially inward directed surfaces of the periphery of the needle end of the shell.

Offered clamps having a surface that is inclined radially outward to the inner porshneva end for engagement surfaces of the shell-type barbed wire from axial stretching in the direction from the needle end, and clamping means are tension elements installed to hold the work in relation to the inner surface of the shell and to pull the clamps tightly against the end of the shell.

The disconnector has at least one lever, which is made essentially axially movable for turning the clamps radially inward out of engagement with the end of obrocki switch with axial movement of the cylinder, for movement of the lever axially to the end of the needle for insertion of clips from snagging.

It is also proposed needle cylinder end for placement around the ends of the levers when the levers are in position radially inward and elastically pressed, the first introduction of the cylinder in the shell, while the levers are biased for radial outward movement along the path of axial movement of the cylinder after pulling the end of the cylinder from its position around the lever ends.

The piston is preferably a piston system, which has a piston head, tightly moving back and forth inside the cylinder, and which has an elongated tapered tubular wedge lying coaxially from the piston head to the operational end of the needle of the syringe, and which is located inside the tubular shell having clamping means with the disc having an axial groove running the length of it, which together with the outer shell provides a hole for fluid through the piston.

Alternative piston is a piston system, which has a piston hermetically performing reciprocating motion inside the cylinder and which has a tube to the mu end, the cylinder has a drive shaft moving inside and which is threaded to match the internal thread of the tube, so that when the piston head on the inner part of the hand end of the cylinder drive rod was held tightly within the tapered end of the tube, the piston system.

In another embodiment, the sheath is a tube with a double wall that is connected to the needle end, and a piston attached to the end of the inner tube, and the tube runs back-and-forth motion with the piston inside the cylinder, and the cylinder is inserted between the inner and outer walls of the shell during such movement.

The piston can be released from the shell breakage of the connection between the inner and outer tubes of the shell along the line of weakening.

The line of weakening is preferably placed on the holder tube in a position extended from the needle end of the shell, and is selected so that the inside of the tubular cylinder remained after this failure along the line of weakening in the work.

This offers education that hold the shell in position, when the piston is retracted in tiling least delayed.

Elastic displacement from the center may be caused in the piston by reason of the deflection of the piston system from the center, when the piston is allocated back together with the cylinder in the work, and the inclination is to send promptly needle attached to the wall of the shell after having caused the rest of the cylinder.

Alternative piston can attach and detach from the shell by turning constipation.

The piston is made of such form to fit snugly to the cylinder inside him, tight enough to force the piston to move with the cylinder during operation, when the piston is detached from the shell.

The invention concerns a piston shell and cylinder adapted for use in the syringe shown above. The invention also concerns hypodermic needles, specially designed for use with the above-mentioned syringe.

Following are preferred examples of the invention with reference to the accompanying drawings, in which:

Fig. 1 to 5 are views in longitudinal cross section of the first exemplary embodiment of the invention in stages of use of the system through the first filling, the release and pulling out the needle in without the figures 1 - 5;

Fig. 7 to 11 are views in longitudinal cross section of a second exemplary embodiment of the invention in stages of use of the system through the first filling, the release and pulling out the needle in a safe position;

Fig. 12 is disassembled components of the exemplary embodiment shown in figures 7 - 12;

Fig. 13 to 15 are side views in cross section of a syringe according to the third exemplary embodiment of the invention, at different stages of operation;

Fig. 16 - 18 - side views in cross section showing the fourth exemplary embodiment of the invention, illustrating various stages of operation.

As can be seen in Fig. 1 and 6, the syringe /1/ has a cylinder /2/, which is made tubular and has a needle end of /3/ is open, and a closed end /4/ with an annular radial flange located /5/, forming a "finger" type grip.

Elongated two piece piston /6/ moves the reciprocating inside the cylinder tight manner and contains a piston upper part /7/ having a seal that separates the internal volume of the cylinder from the rest of the piston. The head has a coaxial cone-rod /8/ passing to the working needle end of the syringe. The rod has a longitudinal canarensis the end of the head.

The second part of the piston is an outer tubular shell /15/, which can be located coaxially around the rod /8/ and has flanges /16/ on the upper end of which is placed exactly in the clamping formations /17/ on the outer side of the head. At the opposite end of the outer shell, forming a needle's end /18/ posted clamping tool /19/.

Clamping means has a pair of diametrically opposite radially outward spaced clips /20/ for engagement with the outer end of the shell, as described below. A pair of elastic stretch petals /21/ is located diametrically opposite one another on an axis at an angle of 90othe clips /20/ and is radially outward for engagement with the inner side of the same end of the shell mentioned above.

Each clip /20/ has performed with him at the same time the loop /25/ by which it is attached to the shell /15/ and has an axial clamping /26/ passing from base to loop to the end of the needle, where it ends serrated part /27/ directed back to the upper end of the /16/ of the piston shell. The lever /30/ is essentially also radially outward in series with the loop /25/ in the base part of the clip and has on each konnen tubular, having open end /41/ at the needle end of the assembled syringe and the opposite end handmade /43/, which is open and which is located radially outward "finger" type loop /43/. The needle end /41/ shell has an annular groove /44/ on its end surface with a sloped base for receiving jagged hook parts /27/ clips /19/. On the inner side of the annular bearing surface /45/ to stop it stretch petals /21/.

To assemble the syringe /Fig. 1/ top /8/ of the piston is inserted inside the outer casing /15/, which is in engagement with its flanges /16/ in education /17/. In this position the groove /9/ and the hole /11/ together form a hole through the assembled piston from the head of the /7/ to the needle end /10/.

The assembled piston inserted into the cylinder /2/ head, pushed fully and resting against the inner surface of the hand end of the /4/ of the cylinder. The cylinder is provided with a convex surface /46/ on the inside in addition to vagotomy groove /12/ in the piston crown. In this position the needle end /3/ of the cylinder is placed around the arms /30/ so that the bearing surface of the ledge /31/ was in the end of the cylinder. This creates an additional voltage saimin step in the Assembly is the insertion of a cylinder of the piston with the piston system, as described above, in the protective shell /40/. The introduction is made through manual end /42/ needle to the end of /41/. The system is being pushed into the shell /40/ up until the clips /27/ will not appear in the socket groove /44/ in the outer end of the shell. At the same time stretch the petals /21/ are held on the inner surface /45/ end of the shell, thereby pressing the clamping formation between the inner and outer annular end surface of the shell.

When the syringe is tightly connected to the needle /not shown/ on the outer end of the /18/ of the shell of the piston, which extends beyond the end of sheath /40/.

After this cylinder /4/ given back for the selection of fluid through the needle and pass through the groove /9/ and the hole /11/ of the piston in the inner space /50/, formed between the head of the /7/ of the piston and the inner volume of the given cylinder.

In this position, the end /3/ of the cylinder are moved away from the ends of the /30/ of the levers of the clamping formations. This causes the ends of the levers can be moved under the elastic exposed to the outside and the path of axial movement of the end /3/ of the cylinder.

After the selected injection site and the needle cylinder is lowered into the casing by means of the piston, causing the release of fluid normal Obregon clamping means, who moved the path of axial movement of the end /3/. Additional lowering of the cylinder in the shell /40/ causes engagement of the lever means and their movement /Fig. 4/ for turning the clamping ends /27/ from engagement with the end of the shell. Clamping education is now free for movement. The friction between the piston head is enough to cause the piston to move with the cylinder under these conditions, and the cylinder can be pulled out from the shell /Fig. 5/ together with the piston system and needle /not shown/ established at the end of it. At the end of the pulling needle is securely hidden in the shell /40/.

Clamping education /51/ preferably provided on the hand-held end of the sheath and the needle end of the cylinder for fastening the parts relative to each other in a safe position, when the needle is withdrawn into the shell.

As shown in Fig. 7 to 12, a second exemplary embodiment of the syringe can be performed as follows. Between the two examples where there is a lot in common, and in Fig. 7 to 12, the same elements are denoted by the same digital items, as described in relation to Fig. 1 - 6.

Syringe /60/ has a protective shell /61/, there are such as described in the previous who meet the drive shaft /63/, lying coaxially within it from hand end of the /4/ to the needle end /3/.

Rod cone tapering from the widest part /65/ to its base where it is attached to the inside of the hand end of the /4/ to the narrowest part /66/, where it emerges from the end of the cylinder. The piston /70/ in this example, the run consists of one part having a piston crown /71/, which is hermetically moves back and forth inside the cylinder and has a tube /72/ similar to the outer shell of /15/ assembled, and the rod /8/ of the previous exemplary embodiment. The hole in the tube is provided with a tapered to match the shape of the drive shaft /63/. The outer casing /72/ has a clamping education /75/, which is the same as above.

Syringe /60/ going /Fig. 7/ introduction of the piston /70/ inside of the cylinder with a drive shaft /63/ passing into the hole through the tubular sheath /70/. Piston head /71/ rests against the inner side hand end of the /4/ of the cylinder and rod /63/ occupies the entire internal volume of the shell /72/. The needle end /3/ of the cylinder is placed around the levers of the terminals, as described above.

The action of the clamp in this second exemplary embodiment along with the shell and the cylinder is to establish a viable cause of syringe /60/ cylinder is pulled out from the casing and drive shaft /63/ pulled out from the shell /70/, opening it and thereby pulling fluid in the vacuum /76/ inside the cylinder and around the drive shaft /63/ /Fig. 8/.

After start Fig. 9/ rod pushes down through the shell /70/, throwing so all the liquid in it, and when the piston head is in contact with the internal cavity of the cylinder, the piston rod closes the end, not allowing the fluid to flow. At the same time the free end of /3/ of the cylinder rests on the wedge clamping education, as described with reference to Fig. 3.

The last impact of the end of the cylinder for clamping the formation shown in Fig. 10, and afterwards removing the cylinder from the shell /Fig. 11/ piston which is extracted together with the cylinder, with the needle into the sheath in its safe position.

As can be seen in Fig. 13, the syringe indicated generally by the digital position /101/ includes syringe cylinder /102/ having outer end handmade /103/ s located radially holder /104/ thumb, and the opposite inner needle end /105/. The needle end /105/ placed in a protective sheath, indicated generally by the digital position /106/.

The sheath is a tube with a double wall, which has an internal tube /107/ with inner needle conceito-and-forth motion within the cylinder /102/, in which it is housed. Inner tube /107/ passes from the piston away from the hand end of the cylinder /102/, in an operative orientation, and essentially along the length of the stroke of the cylinder above the piston to the end of the outer needle end /110/.

The outer needle end /110/ made integral with a radially-located cylinder /111/, which is connected with the outer tube /112/ shell, which is located at a distance around the inner tube /107/. The outer tube /112/ passes from the cylinder /111/, which passes through a needle's end /108/ inner tube, and has a protruding radially outward holders /113/ finger around her, roughly around the piston position /109/. The space between the outer tube /112/ and inner tube /107/ such that the cylinder /102/ piston can slide between the tubes up until the inner end /113/ piston /109/ not in contact with the interior manual end /103/ cylinder.

The piston /109/ has an axial hole /114/, which passes through it from the inner end to the outer end /116/ made of such form that it could enter the subcutaneous needle /117/.

Subcutaneous needle /117/ has on your inner end of the tip /119/ for installation around the outer end /121/ is thickened and has education /122/, which slide on the inner surface of the tube /107/ shell. These formations can also move in the tube /107/ if the piston is released from its attachment to the shell and moves with the cylinder. The needle is located outward from the thickened end /121/ length /123/, which ends at the tip of the needle /124/.

The piston /109/ attached to the inner tube /107/ by fitting connections /107A/ in order that it can be inserted in the end of the shell, and twisted to block relative axial movement from this position. If the piston is rotated or twisted in the unlocked position, it can be axially pulled out of the tube shell.

As can be seen in Fig. 14, the cylinder is fully lowered to the length of the piston so that the cylinder of the syringe was placed inside the tubular space between the inner tube /107/ and at a distance from the outer tube /112/ shell.

Typically, the syringe in the position described with reference to Fig. 14, is used for the needle in the injected substance and drawn out to the position indicated in Fig. 13. This causes the substance to stretch up into the cylinder of the syringe through the needle and the hole in the plunger to fill the syringe.

And what with reference to figure 14, with the cylinder of the syringe fully descended into the sheath, and a needle projecting out of the end shell. In order to make a safe syringe cylinder of a syringe again rotate relative to the shell. To achieve this, use paradisiacal /113/ 104/. Turning is made from constipation to constipation fitting connection in order to separate the piston from the end of the shell.

The friction between the piston and the cylinder of the syringe is sufficient to force the piston together with the attached hypodermic needle to move with the cylinder when the cylinder is pulled out from the shell. The cylinder is again extracted, pulling the piston for hand end with him. This causes the needle to be withdrawn into the shell, being protected by a shell from accidental contact.

It is preferable to provide a kind of clamping mechanism /124A beaches/ so that when vtyanuta the syringe when it is moved to a certain position relative to the shell, it was blocked and could not be pushed forward in the ejection position. This provides protection around the needle and will not allow you to re-use the syringe.

As shown in figures 16, 17 and 18, here presents a fourth alternative exemplary embodiment of the invention. what about the links in Fig. 13 - 15. However, in this case, the internal pipe shell /106/ placed around the elongated parts /133/ tube piston /134/. The piston /134/ segment /135/ his tubes have a Central axial hole /135/ passing from the inner end of the piston /136/ to the outer end of the piston /137/ right at the end of the concentric tubes /130/ 132/ shell. The initial segment /138/ inner tube /132/ surrounding the outer end /137/ piston has a diameter slightly greater than the diameter of the rest of the tube. Radial speed connection forms a circular line of weakening /139/. The outer end /137/ piston has a shape for the installation of a standard hypodermic needle /140/.

In the process /Fig. 17/ cylinder of the syringe is lowered by sliding cylinder in the space between the two concentric tubes /130/ 132/ until, while domestic horses /136/ piston reaches the inner portion of the free end /103/ cylinder. The injected fluid is drawn into the cylinder by pulling the cylinder out of its position described with reference to Fig. 13.

This is followed by injection and cylinder returns to its position described with reference to Fig. 14, where it is fully lowered into the shell /106/.

This put is conducted on the distance from paradigalla /113/ shell. The piston is fixed relative to the inner tube /132/ due to the fact that the tube /132/ placed around the constricted portion formed of an elongated part /133/ piston.

To make the safe syringe, the syringe is held by the hand end of the cylinder, facing down, and sharply push relatively hard surface. This causes the cylinder of the syringe to move in a shell on the amount of space between Palatinates /104/ 113/, breaking thereby the inner tube /132/ line attenuation /139/.

The piston is cut off from the shell, and it can be pulled out together with the cylinder of the syringe. As shown, the needle that is attached to the outer end of the piston is slid into the outer tube /130/ shell.

The distinctive feature of this exemplary embodiment is the elastic displacement of the tube of the piston to tilt the piston axially to one side, when the cylinder reaches the end of its path of pulling out. It is designed to force the end of the piston together with needle /140/ deviate from the center point of the needle behind the cylinder /138/. In this position, when the cylinder is again lowered into the movement of the ejection, the needle is rotated forward and will be in space is m connection and the opposite end in the form of a handle, a piston having first and second opposite ends and placed in the cylinder and open at both ends in the main tubular shell, wherein the piston has a first end facing the end of the needle connection of the cylinder, and between the ends of the piston has a channel for the fluid which is communicated with the needle connection on the end of the needle connection of the cylinder, the shell is placed over the cylinder and the shell and the piston additionally have a means of attachment of the piston that attaches the piston to the casing, and the cylinder has means unpin located with the possibility of release of the piston from the shell.

2. The syringe under item 1, characterized in that the shell sits on top of the cylinder before placing the piston, the piston is attached to the shell, and the shell at this end has paradisiacal.

3. The syringe under item 2, characterized in that the fastening means includes clamping means with the means of liberation.

4. The syringe under item 3, characterized in that the means unpin cylinder located at the end of the cylinder inside the shell.

5. The syringe under item 4, characterized in that the clamping means is made is displaced radially outward terminals, installed with S="ptx2">

6. The syringe under item 5, characterized in that the clamps have a surface that is inclined radially outward to the second end of the piston and the clamping means are tension bodies established for podpiranja the inner surface of the end shell.

7. The syringe according to any one of p. 5 or 6, characterized in that the means of liberation has at least one lever, which is connected through the axis of rotation with clips.

8. The syringe under item 7, characterized in that the end of the needle connection of the cylinder is made of such form that provides emphasis to the lever means of liberation in the axial direction of the cylinder.

9. The syringe under item 8, characterized in that the needle end of the cylinder can be positioned around the ends of the levers when the levers radially inside and elastically compressed position, the levers have an inclination for movement radially outward.

10. The syringe under item 9, characterized in that the piston is made in the form of a system, which has a piston head within the cylinder and which has an elongated tapered tubular stem, prostituudid coaxially from the piston head to the needle connection, and the rod is located within the outer tubular shell, a bearing clamping crestet channel for fluid through the piston.

11. The syringe under item 9, characterized in that the piston is made in the form of a system, which has a piston head within the cylinder, and the piston cylinder is a tube with a conical bore passing from the widest part of the piston in the cylinder and carries clamping means at the other end of the tube, the cylinder carries a drive shaft extending inside the hole, which has a taper to match the taper hole.

12. The syringe under item 2, characterized in that the sheath is a tube with a double wall having concentric inner and outer walls connected at the needle end, means mounting the piston is attached to the shell at the end of the inner wall, and the cylinder is inserted between the inner and outer walls of the shell.

13. The syringe under item 12, characterized in that between the inner and outer walls of the shell has a line of weakening.

14. The syringe under item 13, wherein the line of weakening is placed on the support tube in position, are moved away from the needle end of the shell.

Priority points:

28.07.92 - PP.1, 2, 12 - 14;

21.10.92 - PP.3 - 11.

 

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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.

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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.

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Syringe-container // 2264231

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

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EFFECT: simplified construction.

2 cl, 5 dwg

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

17 cl, 7 dwg

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EFFECT: improved precision; prevention of complications.

1 ex

FIELD: medicine; medical engineering.

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3 cl, 2 dwg

FIELD: medicine.

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1 dwg

FIELD: medicine.

SUBSTANCE: initially skin area is chosen for anaesthesia. Then ultrasonic sensor is applied, and various skin areas are periodically pressed by finger, thus observing wavy changes of tissue structure under pressing on the screen. Place chosen for injection is that where deformation wave most precisely reaches chosen area. Further distance to chosen area from skin surface is measured with following tissue puncture with long injection needle on this depth with preliminary introduction of novocaine in amount 1-1.5 ml. Localization of medicinal infiltrate appearing in tissues is visualised, and if infiltrate created by novocaine injection is resolves within no more than 1.5 minutes, this area is intermittently introduced with medicinal agent dosed 1 ml under ultrasonic control of every introduction accuracy and infiltrate resolution intensity. Next portion of medicine is introduced after complete infiltrate resolution, created by last portion. In case infiltrate is intact within 3 minutes medical product introduction is stopped, and in medicinal infiltrate is introduced with 10 ml of novocaine solution.

EFFECT: prevention of postinjective complications owing to area selection accuracy.

1 ex

Safe syringe // 2329067

FIELD: medicine.

SUBSTANCE: invention refers to syringes. First version of design implies safe syringe including injector as tube with centre aperture, forming internal container, push rod inserted into injector container by flanged piston, bush with hollow sleeve being hold by injector aperture, needle assembly and sealing element. Sleeve is equipped by upper detachable junction and lower bush in its cavity so that needle base is supplied with connecting insert forming upper detachable junction. Lower push provides connection with flanged push rod. Needle assembly consists of needle base and needle body. Needle base is mounted outside of bush sleeve. Sealing element is made of elastic materials and preliminary formed by bush sleeve, and include external section provided outside of sleeve and forming air-tight connection with internal wall of injector container. Second version implies that needle base is supplied by connecting insert for upper detachable sleeve junction sealing element is furnished with lower bottom bush inside of sleeve for detachable junction with flanged push rod. In third version needle base is mounted outside of bush sleeve, and sealing element inside of sleeve is provided with upper and lower bushes, and needle base is furnished with connecting insert forming upper detachable junction, and lower bush provides connection with flange of pusher rod. In fourth version needle base is mounted outside of bush sleeve, but thus sealing element is equipped with internal threaded section, and forms lower bush inside of sleeve, and needle base is supplied with external threaded section to form connection with external threaded section, and lower bush provides connection with flange of push rod. In fifth version needle base also is mounted outside of bush sleeve, and sealing element is supplied with lower bush inside of sleeve to form connection with flange of push rod.

EFFECT: assemblage simplification, productivity increase, and profitability increase.

15 cl, 18 ex

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