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WO2003041765A1 - Seringue pour anesthesie - Google Patents

Seringue pour anesthesie Download PDF

Info

Publication number
WO2003041765A1
WO2003041765A1 PCT/DE2002/004164 DE0204164W WO03041765A1 WO 2003041765 A1 WO2003041765 A1 WO 2003041765A1 DE 0204164 W DE0204164 W DE 0204164W WO 03041765 A1 WO03041765 A1 WO 03041765A1
Authority
WO
WIPO (PCT)
Prior art keywords
syringe
control unit
injection
anesthetic
syringe according
Prior art date
Application number
PCT/DE2002/004164
Other languages
German (de)
English (en)
Inventor
Said Mansouri
Original Assignee
Said Mansouri
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE2001154954 external-priority patent/DE10154954A1/de
Application filed by Said Mansouri filed Critical Said Mansouri
Priority to DE10295185T priority Critical patent/DE10295185D2/de
Publication of WO2003041765A1 publication Critical patent/WO2003041765A1/fr

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142Pressure infusion, e.g. using pumps
    • A61M5/145Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/33Controlling, regulating or measuring
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/50General characteristics of the apparatus with microprocessors or computers
    • A61M2205/52General characteristics of the apparatus with microprocessors or computers with memories providing a history of measured variating parameters of apparatus or patient
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142Pressure infusion, e.g. using pumps
    • A61M5/145Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M5/14526Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons the piston being actuated by fluid pressure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/48Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for varying, regulating, indicating or limiting injection pressure
    • A61M5/484Regulating injection pressure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/48Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for varying, regulating, indicating or limiting injection pressure
    • A61M5/486Indicating injection pressure

Definitions

  • the registration concerns an anesthetic injection.
  • Usual syringes essentially consist of three elements: a piston, a cylinder and a needle.
  • the needle is immersed in the liquid to be injected, ie the anesthetic, and the plunger is slowly pulled out of the cylinder with the tip immersed until a sufficient amount of anesthetic is sucked into the cylinder through the needle.
  • the syringe is then subjected to slight shocks with the needle pointing upwards, in order to allow any air in the cylinder to move upwards in the cylinder where the needle is connected to the cylinder. This can be done by tapping the syringe with a finger, for example.
  • the plunger is then carefully pushed back into the cylinder until liquid emerges from the needle and it can therefore be assumed that there is no air left in the syringe.
  • the tip of the needle near the target area into which the anesthetic is to be introduced is inserted into the body so that the tip of the needle protrudes into the target area.
  • the person who sets the syringe then pushes the plunger - usually with his thumb - back into the cylinder and displaces it through the anesthetic that is injected through the needle.
  • the syringes must be relatively light and small in order to ensure good handling for a user. This is particularly important if the syringe is to be placed in an area that is difficult to access, as is often the case in dentistry, for example.
  • the inventor has therefore set himself the task of developing a conventional anesthesia syringe in such a way that the injection process can be controlled and repeated to the greatest possible extent.
  • an anesthetic syringe which has a control unit for controlling the injection process.
  • the syringe should remain essentially small and handy.
  • various united advantages In particular, the setting of the syringe remains completely in human hands and can be carried out inimitably precisely.
  • the injection process is carried out automatically or semi-automatically by the control unit, so that the greatest possible precision can also be achieved here. This optimizes the injection results as much as possible.
  • the control unit can be arranged both in the syringe and on the syringe or separately from it.
  • small controls such as a measuring device or a display
  • control devices can prove themselves, especially separately from the actual syringe.
  • an arrangement of light-emitting elements is shown, for example, which shows the user how an injection parameter relates to a setpoint.
  • control In the case of a control which directly influences the anesthetic, it can be advantageous if the control is arranged in a device separately from the syringe and, for example, there is a hose-like connection to the carpule of the syringe.
  • a disembodied connection such as a radio and / or infrared connection can also exist.
  • the syringe can be supplied with current.
  • light-emitting diodes can also be arranged on the carpule that emit bright light along the needle.
  • the control unit can advantageously have means for controlling, preferably regulating, the injection pressure.
  • the injection pressure is an essential parameter in the injection process. Depending on the type of tissue that prevails in the target area of the injection, different pressures may be required for an optimal result. If the injection pressure is regulated, the syringe can be used with great success for a wide variety of tissue types.
  • the injection pressure has a time gradient.
  • a low initial pressure for example, a patient's sensation of humor can often be avoided.
  • a high initial pressure - as generally a high injection pressure - can cause the anesthetic to be distributed over a large area in the tissue. It is up to the attending doctor to determine which pressure curves are recommended for which application. Even unqualified users can perform very good injection processes with the pressure control device.
  • the control unit can have means for specifying the injection time.
  • the user's thumb can easily weaken, as a result of which the pressure sensation and, as a consequence, the control competence of the user are negatively influenced.
  • the injection time can be specified and the injection process is automatic or semi-automatic table takes place exactly over the predetermined time, this is advantageous, both for the user of the syringe and for the patient.
  • control unit of the anesthetic syringe has a data memory.
  • this enables the anesthetic syringe to be used independently. For example, even recommended values for different injection parameters and different parameter combinations can be available for selection in the syringe.
  • data from injections made were recorded in the data memory. In this way, injection processes could be evaluated and further findings for subsequent injection processes could be obtained.
  • the syringe is connected to a programming device and data for control are transferred to the syringe on the programming device. The syringe can then be separated from the programming device and can only store the data which are relevant for the respective injection process. As a result, an internal syringe data memory can be made very small.
  • control unit has means for reading data. These can be saved if data storage is available; however, they can also be processed by the control unit in real time. In this case, data can advantageously be input separately from the syringe or the control unit. ben, saved and / or edited. A conventional computer can even be used for this.
  • the anesthetic syringe according to the invention has a drive.
  • a drive opens up the possibility of fully automatic operation of the anesthetic syringe.
  • the control can have a direct influence on the drive, so that the plunger of the syringe can even be advanced without any human-haptic control and the associated inaccuracies.
  • the feed can be carried out, for example, by a motor which acts on the piston via a gear.
  • piezoelectronic drives are also conceivable in order to make the syringe according to the invention as small as possible.
  • the advantage of piezo electronics is that an exact position measurement of the piston within the cartridge cylinder is also easily possible. This is also possible, for example, using a built-in potentiometer or a resolver.
  • the syringe according to the invention has hydraulics and / or pneumatics.
  • hydraulic or pneumatic control can do without electronics. If a pressure is built up in the hydraulic fluid, this pressure can be used to move the control means and even enable hydraulic control or regulation. This pressure is advantageously generated via a gas pressure cushion.
  • the gas pressure can be provided by a gas cartridge such as an N 2 or C0 2 cartridge.
  • the syringe can have an ampoule holder and / or a holder for an ampoule holder.
  • This in particular eliminates the need to suck the fluid to be injected into the carpule before the injection.
  • a filled ampoule can be placed in a receptacle arranged, for example, between the needle and the piston and the injection agent contained can be pressed through the needle by simply advancing the piston.
  • the ampoule can, for example, be inserted laterally into the ampoule holder if the holder has appropriate means for this.
  • the ampoule holder can be detachably held on the carpule, for example by a thread or a latching device, so that an ampoule can be inserted along the longitudinal axis of an ampoule holder removed from the carpule for this purpose, whereupon the syringe after fastening the filled ampule holder is immediately ready for use on the carpule.
  • the syringe according to the invention can preferably also have a device for path-controlled manual operation.
  • a simple, inexpensive construction of the syringe can be made possible.
  • the syringe has a space for storing a compressed gas. This even makes the syringe independent of external gas cartridges. Rather, a conventional N 2 or C0 2 cartridge can be connected to the room via a suitable valve device and place the room under high gas pressure. After removing the gas cartridge, the pressure in the storage space in the syringe remains real, so that the syringe can apply the forces required for injection completely independently for a large number of injection processes.
  • FIG 1 schematically shows an embodiment of a syringe according to the invention, in which a control unit is arranged separately from the carpule and connected to it and
  • Figure 2 shows a section through an alternative syringe according to the invention, which is driven by gas pressure.
  • the syringe 1 in FIG. 1 essentially consists of the cartridge cylinder 2, which surrounds a cavity 3, a piston 4, a needle 5, the control inlet 6 and the slim, flexible connection 7.
  • a hollow passage 8 is the needle 5 connected to the cavity 3.
  • the piston 4 can be moved along a pressure direction 9 or a suction direction 10 within the cylinder 2, the piston 4 always separating the cavity 3 from a rear cavity 11 and the piston ben 4 is also connected to a potentiometer 13.
  • the rear cavity 11 is connected directly to the control unit 6 via a hose 12 arranged in the connection 7.
  • the syringe also has a switch 14, which can assume three positions 15, 16, 17. Like the potentiometer 13, the switch 14 is connected to the control unit 6 via a line (not shown) which also runs through the connection 7. Both on the Steueremngseinlieit 6 and on the syringe 1, light indicators 18, 19 are also arranged, which can light up green and red, respectively.
  • control unit 6 there is also a power connector 20, a push button 21, a data connector 22 and a radio module (not shown) on the control unit 6, the control unit 6 being able to communicate with a commercially available computer by means of the latter two, for example via an integrated interface card ,
  • the rear cavity 11 as well as the associated connecting hose 12 and a communicating space (not shown) in the control unit 6 are completely filled with a hydraulic fluid 23.
  • This can be chosen independently of the anesthetic.
  • the user now pushes the switch 14 from the neutral position 15 to the front position 16. He must hold the switch 14, because a small return spring (not shown) automatically moves the switch 14 back into the neutral position 15 when released front position 16 is controlled by the Unit 6 detects, whereupon this presses more hydraulic fluid 23 into the rear cavity 11 and thus displaces the piston 4 along the pressure direction 9.
  • the control unit 6 continuously measures the position of the piston 4 via the potentiometer 13. When the piston 4 has reached the front end 24 of the cavity 3, the control unit 6 immediately stops the movement of the piston 4.
  • the user releases the switch 14 and dips the needle 5 with its tip 25 into a liquid to be injected, for example an anesthetic (not shown). With the tip 25 submerged, the user pushes the switch 14 from the neutral position 15 into the rear position 17. This is registered by the control unit, which then sucks hydraulic fluid 23 out of the rear cavity 11 and thereby forces the piston 4 along it Bear direction 10. As a result, anesthetic is sucked through the hollow passage 8 into the cavity 3. As soon as the user releases the switch 14 or the piston 4 reaches a rear end 26 of the carpule 2, the control stop stops the movement.
  • an anesthetic is sucked through the hollow passage 8 into the cavity 3.
  • the user pulls the tip 25 out of the anesthetic, points it upwards and shakes the syringe 1 slightly in order to let air possibly present in the cavity 3 rise towards the tip 25.
  • the switch 14 By briefly displacing the switch 14 into the front position 16, the user also moves the piston 4 in this direction until anesthetic agent emerges from the tip 25 and it can consequently be concluded that the anesthetic agent completely fills the cavity 3 and the passage 8.
  • the control unit 6 causes the light indicators 18, 19 to flash once red and once green and then switch them to a continuously green light.
  • the control unit 6 switches the light indicators 18, 19 to flashing red. The user must now bleed the syringe 1 abe ⁇ nals and then press the button 21.
  • the syringe 1 prepared in this way now sticks into the tissue with the tip 25 in a conventional manner. Then he pushes the switch 14 into the front position 16 and holds it there.
  • the control unit 6 is hereby instructed to start an injection program, which the user has defined in advance in several parameters via the commercially available computer and transmitted to the control unit 6. According to the defined parameters, the control valve 6 now regulates via the hydraulic fluid 23, via the potentiometer 13, via a flow meter (not shown) installed at the control end 27 of the hose 12 on the control side and further via a pressure meter (not shown) of the hydraulic fluid in the Steueremngseinlieit 6 the advance of the piston 4 and thus the injection of the anesthetic.
  • the feed of the piston 4 is stopped and the illuminated indicators 18, 19 are set to flashing red.
  • the data from the potentiometer 13 are verified on the basis of measurements from the flow meter within the control unit. If extraordinary deviations of these two values occur or if the control unit 6 has other knowledge that the injection process is not proceeding according to plan, such an emergency stop is carried out as a precaution.
  • the injection pressure measured by the control unit 6 in the hydraulic fluid 23 or in the cavity 3 can be assigned a defined sequence depending on the time. Via the distance measurement, the injection quantity of the anesthetic agent can also be assigned a specific sequence over time, or the injection time can simply be specified.
  • the control unit thus has data and processes for numerous anesthesia applications, so that an accurate, repeatable and thus optimal anesthesia is made possible.
  • the computer for programming the control unit 6 can also be networked backwards with a data pool from which it obtains data.
  • the syringe 30 according to the invention in FIG. 2 essentially consists of a gas pressure element 31, a body 32, a spring lever 33 and an ampoule holder 34.
  • the gas pressure element 31 has a filling opening 35 to which a gas pressure cartridge can be connected. From here, the compressed gas reaches a spoke space 36 which is connected to a pressure channel 37 and is otherwise completely sealed. The gas pressure element 31 surrounding the storage space 36 is screwed into the body 32 of the syringe 30 via a thread 38.
  • a bellows 40 is connected to the pressure channel 37 in a gas-tight manner at an opening 39 of the pressure channel 37.
  • This is located in a hydraulic two-chamber system 41, which makes up a large part of the body 32.
  • a rear hydraulic chamber 42 is connected to a front hydraulic chamber 44 via a hydraulic channel 43a, 43b, 43c, 43d.
  • a sealing piston plate 45 separates the rear hydraulic chamber 42 from the front hydraulic chamber 44.
  • the hydraulic channel 43a, b, c, d leads along a closure 46 which is held in a position by means of a spring 47 with its conical tip 48 which holds the hydraulic channel 43a , b, c, d closes.
  • the closure 46 is connected via a joint 49 to the spring lever 33, which in turn is rotatably mounted about the bolt 50.
  • the piston plate 45 hangs on a piston 51 which is displaceable along an axis 52. He is conclusive and sealed by a sealing device 53 guided, which is screwed into the body 32 via a fastening thread 54.
  • the ampoule receptacle 34 is held on the body 32 via a holder 55. It has a needle holder 56 for receiving an injection needle. It also has two viewing windows 57, 58.
  • a gas cartridge is connected to the filling opening 35 and the storage space 36 is filled, for example, with N 2 or C0 2 under high pressure.
  • a check valve 59 keeps the gas pressure inside the storage space 36.
  • the storage space 36 is filled with 50-70 bar.
  • the hydraulic chambers 42, 44 and the hydraulic channel 43a, b, c, d are filled with a hydraulic fluid, for example a non-toxic white oil.
  • the ampoule receptacle 34 is detached from the holder 55 and an ampoule (not shown) is inserted into the ampoule receptacle 34 along the axis 52.
  • the ampoule holder 34 is fastened again to the body 32 and a needle (not shown) is inserted into the needle holder 56.
  • a needle (not shown) is inserted into the needle holder 56.
  • the closure 46 is pulled out of the channel 43 c, so that the two hydraulic chambers 42 and 44 communicate with one another.
  • the bellows 40 transfer the pressure from the storage space 36 to the hydraulic system 41, so that essentially identical pressure conditions prevail on both sides of the piston plate 45. Since the engagement surface 61 is larger than the surface 62 opposite it, the piston 51 moves in Direction of the spray needle. Hydraulic fluid flows from the front hydraulic chamber 44 through the hydraulic channel 43a, b, c, d along the tip 48 of the closure 46 into the rear hydraulic chamber 42.
  • the piston speed of the piston 51 can be determined very well manually via the low-pressure path of the spring lever 33.
  • the piston 51 begins to move after a lever travel of approx. 0.7 mm, which arises due to the leverage, and the speed increases linearly over large areas with the stylus travel to approx. 5 to 6 mm per second at approx. 2. 5 mm leverage in this example.

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention vise à optimiser l'administration par injection d'agents anesthésiants en médecine. A cet effet, une seringue (1) servant à l'anesthésie comporte une unité de commande (6) qui pilote le processus d'injection.
PCT/DE2002/004164 2001-11-11 2002-11-08 Seringue pour anesthesie WO2003041765A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10295185T DE10295185D2 (de) 2001-11-11 2002-11-08 Anästhesiespritze

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2001154954 DE10154954A1 (de) 2001-11-11 2001-11-11 Apparat zur Anästhesie für Zahnmedizin und anderen medizinischen Anwendungen
DE10154954.7 2001-11-11
DE0203915 2002-10-16
DEPCT/DE02/03915 2002-10-16

Publications (1)

Publication Number Publication Date
WO2003041765A1 true WO2003041765A1 (fr) 2003-05-22

Family

ID=25750295

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/004164 WO2003041765A1 (fr) 2001-11-11 2002-11-08 Seringue pour anesthesie

Country Status (1)

Country Link
WO (1) WO2003041765A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005075009A1 (fr) * 2004-02-03 2005-08-18 Smjm Inject Gmbh Seringue pour anesthesie
DE102004023235A1 (de) * 2004-02-03 2005-09-01 Mansouri, Said, Dr.med.dent. Anästhesiespritze
US7717879B2 (en) 2004-02-03 2010-05-18 Smjm Inject Gmbh Anesthetic syringe
CN104520197A (zh) * 2012-06-07 2015-04-15 和谐医疗有限公司 改进的注射器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5180371A (en) * 1986-05-30 1993-01-19 Spintech, Inc. Hypodermic anesthetic injection apparatus and method
US5690618A (en) * 1995-02-22 1997-11-25 Mark Timothy Smith Electronic syringe
EP0567186B1 (fr) * 1992-04-21 1999-01-27 Nycomed Imaging As Pousse seringue à main
WO2001013973A2 (fr) * 1999-08-19 2001-03-01 Rosa Alceu Meibach Jr Systeme et procede d'injection de liquides medicaux
WO2001021234A1 (fr) * 1999-09-17 2001-03-29 Baxter International Inc. Distributeur de fluide a flux fluidique stabilise

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5180371A (en) * 1986-05-30 1993-01-19 Spintech, Inc. Hypodermic anesthetic injection apparatus and method
EP0567186B1 (fr) * 1992-04-21 1999-01-27 Nycomed Imaging As Pousse seringue à main
US5690618A (en) * 1995-02-22 1997-11-25 Mark Timothy Smith Electronic syringe
WO2001013973A2 (fr) * 1999-08-19 2001-03-01 Rosa Alceu Meibach Jr Systeme et procede d'injection de liquides medicaux
WO2001021234A1 (fr) * 1999-09-17 2001-03-29 Baxter International Inc. Distributeur de fluide a flux fluidique stabilise

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005075009A1 (fr) * 2004-02-03 2005-08-18 Smjm Inject Gmbh Seringue pour anesthesie
DE102004023235A1 (de) * 2004-02-03 2005-09-01 Mansouri, Said, Dr.med.dent. Anästhesiespritze
US7717879B2 (en) 2004-02-03 2010-05-18 Smjm Inject Gmbh Anesthetic syringe
CN104520197A (zh) * 2012-06-07 2015-04-15 和谐医疗有限公司 改进的注射器
CN104520197B (zh) * 2012-06-07 2017-04-05 和谐医疗有限公司 改进的注射器

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