![]() water jet surgery instrument
专利摘要:
INSTRUMENT FOR WATER JET SURGERY. The present invention relates to a surgical instrument (10, 110, 210, 310) that is arranged to perform surgical operations with a water jet comprises a nozzle (18) that can be displaced by means of a hydraulic actuator (23) outside from a stowed or passive position to a forward or active position. The actuation is performed by means of a hydraulic fluid that is supplied to the instrument head (11) via a tube (20) and / or a hose (43). The fluid, for example, a sodium chloride solution that will be injected into the tissue can be used as the hydraulic fluid that is supplied to the nozzle (18). Preferably, the HF current can be additionally applied to the nozzle (18). Said HF current can be conducted to the nozzle via a line (30) which extends through the fluid conducting element (15) or via the electrolyte present therein. 公开号:BR102012031754B1 申请号:R102012031754-0 申请日:2012-12-13 公开日:2021-01-26 发明作者:Steffanie Schmidt;Ralf Kuhner 申请人:Erbe Elektromedizin Gmbh; IPC主号:
专利说明:
[001] The invention relates to a surgical instrument for water jet surgery, optionally combined with high frequency surgery (HF). [002] Publication EP 0 530 400 B1 presents an instrument for high frequency surgery and cutting and coagulation with an HF current, in which this instrument comprises a flexible rod with a retractable needle shaped HF electrode at its tip. A cable is obtained by extending the rod, for mechanical movement and for supplying energy to said electrode. The cable is used for the electrical supply of the electrode, as well as for transmitting a mechanical movement to the electrode. [003] The publication EP 0 536 440 B1 also revealed the design of the rod as a fluid conducting element through which the washing fluids can be supplied to the HF electrode and can also be used for the suction operation. [004] In addition, publication CA 2497897 A1 reveals an endoscopic instrument with scissors attached to its distal end. The latter is actuated by means of fluid cylinders which are connected via fluid conducting means to a hydraulic actuating member at the proximal end. [005] In addition, the publication E 10 2009 017 636 A1 has revealed the use of a fluid jet arrangement comprising at its distal end, a mouthpiece to perform a needle-free dissection and / or injection into a tissue. In addition, it was revealed from this publication, the obtaining of this fluid jet arrangement with an HF electrode to perform additional treatment measures such as, for example, cutting and / or coagulating the tissue by means of HF current. In operation, the surgeon can selectively inject HF fluid or current jets into the tissue, in order to initiate the desired effect, in which case, however, he does not need to change the instrument each time to achieve this, shortening this mode, the operating time and simplifying the handling of the instrument. [006] It is the object of the invention to improve a surgical instrument for fluids, increasing its handling reliability. [007] This object can be achieved with the instrument according to claim 1: [008] The instrument according to the invention comprises an upper part of the instrument that supports a movable mouthpiece. This nozzle can be moved back and forth between a first position and a second position. Preferably, this movement is a linear movement. However, different movements, for example, pivot movements, or rotating movements are also possible. The two positions can be an active position and a passive position. The nozzle's ability to move between an active position and an active position makes it possible for the nozzle to be oriented to a protected position, for example, when it is being positioned in a cavity in the patient's body or in the patient's tissue. As a result, the nozzle can be configured as an extremely fine needle. There is no danger because the needle may bend or break in the tissue when the instrument is being positioned and when the needle is in its protected position, for example, in a retractable position (passive position). [009] To carry out a treatment, the mouthpiece can be taken to an active position. For example, a needle shaped nozzle can then be moved forward in the longitudinal direction and thus be free and exposed in the fabric. In this case, the nozzle can act as an HF electrode, for example, in order to inject a current of HF into the tissue and carry out the desired surgical action. It is also possible to use the nozzle to eject a water jet. Preferably, this is also done in the forward position, that is, in the active position. [0010] Alternatively, a water jet injection is also possible with the nozzle in the retracted position, this modality being within the scope of several modality options. [0011] According to the invention the nozzle is connected to a hydraulic actuator, whereby the nozzle can be moved back and forth between at least two positions, that is, between an active position and an active position . The hydraulic actuator comprises a fluid chamber that is charged with hydraulic fluid. The proposed fluid chamber in or on top of the instrument communicates with a fluid-conducting element, for example, a tube or a hose or a combination of the two, with a connector body of the instrument. From the latter, the hydraulic fluid is transported through the fluid-conducting element to the actuator, which then moves the nozzle to the active position or to the passive position. [0012] Preferably, the actuator is arranged to move the nozzle to the active position although it can be moved to its retracted or passive position by means of springs. This applies, in particular, when the nozzle is supported so that it is linearly displaceable. Preferably, the nozzle is supported to move in a linear position along the direction of the jet defined by said nozzle. If the nozzle is shaped like a needle, it is moved along its longitudinal direction. [0013] Preferably, the hydraulic actuator can be designed as a piston / cylinder unit. However, other actuators are also possible, for example, balloon arrangements, or the like, which exchange fluid pressure or fluid volume for mechanical movement. [0014] The triggering movement thus obtained can be a pressing movement, a sustaining movement or a pulling movement. [0015] Preferably, a fluid generally recognized as physiologically safe is obtained as the hydraulic medium, for example, as a sodium chloride solution, preferably a physiological solution of table salt. This can be the fluid that will be ejected from the nozzle or a fluid transported in separate channels. The fluid pressure varies by means of a regulating device for the hydraulic actuation of the actuator. This regulating device can be actuated, for example, manually or it can also consist of other technical means, such as pumps or the like. The nozzle can be connected to a high frequency current source. The HF current (or the HF voltage) can be carried out via suitable electrical conductive means from the instrument's connector body to the main part of the instrument and hence, particularly, to the nozzle which then acts as the electrode. Optionally, it is also possible to obtain separate electrodes. For electrical conduction, an insulated metal wire may or may not extend through the fluid-conducting element. However, it is still possible to use the hydraulic fluid present in the fluid-conducting element as the electrical conductor, particularly when said fluid is an electrolyte, for example, a NaCl solution. In this respect, it is possible to build highly flexible and very thin instruments for waterjet surgery, and, in particular, for combined waterjet / electric surgery. [0016] Preferably, the nozzle has a nozzle channel communicating with the fluid chamber and, therefore, with the (first) fluid-conducting element. However, it is still possible to obtain a second fluid-conducting element that supplies fluid to the nozzle, while the other (first) fluid-conducting element is used only for actuating the actuator. The two fluid-conducting elements can be arranged in a coaxial position in relation to each other (in each other) or, otherwise, they can be arranged in parallel with each other. [0017] Preferably, the nozzle is in association with a valve, which is able to release or block the connection of the element that feeds the fluid conduction to the nozzle. This valve can be actuated electrically or hydraulically. For example, this valve can be activated by the supplied HF voltage, and it can also be activated by means of a direct voltage that is superimposed on the HF voltage. Alternatively, a control voltage can be applied to the valve via a separate line. In addition, the valve can be actuated by the fluid pressure that is applied to the nozzle and / or the hydraulic actuator. [0018] Additional details of the advantageous embodiments of the invention are the subject of the description or the claims or the illustrated drawings: [0019] Figure 1 is a schematic longitudinal segment of a first modality of an instrument for combined water jet and HF surgery; and [0020] Figures 2 and 4 are schematic representations, each in a longitudinal section, of additional modalities of water jet / HF combined surgery instruments. [0021] Figure 1 is a schematic representation of an instrument 10 being at least suitable for performing operations by water jet surgery. Instrument 10 comprises an instrument head 11 which is the distal end of instrument 10, viewed from the surgeon's perspective. The proximal end of the instrument 10 is a connector body of the instrument 12 that can accommodate actuating elements 13, 14 for the actuation or not of the instrument 10. The connector body of the instrument 12 can be designed as a clamp or otherwise. [0022] A fluid conducting element 15 is disposed between the instrument connector body 12, said connector body represents the proximal end of the instrument 10 and the head of the instrument 11. For example, said fluid conducting element comprises a flexible hose 16 , a rigid or flexible tube, or a combination of hose and tube segments, or other means, said means enclosing a channel 17 which may contain a fluid. The fluid is a hydraulic fluid. In the present case, the fluid is preferably a sodium chloride solution, for example, a physiological solution of table salt. A nozzle 18 is proposed on the head of the instrument 11, said nozzle being supported so as to move in a longitudinal direction, as indicated by an arrow 19. [0023] Preferably, the nozzle 18 is associated with an elongated needle-like tube 20, in which case, a nozzle body 21 can be disposed at the end of said tube. Preferably, the nozzle 18 is arranged to obtain a fine stream of fluid capable of separating layers of tissue from each other or of perforating them and thus being able to inject fluid into the tissue. The jet of fluid can be laminar or turbulent, for example, conical or differential shaped. Preferably, tube 20 consists of metal. [0024] The nozzle 18 can be moved between a stowed, inactive position, and moved forward, active position along the direction S of the jet. Figure 1 shows the retracted position in which the nozzle 18 is partially retracted towards the head of the instrument 11. The nozzle 18 can be moved axially from the head of the instrument 11. In figure 1, a forward displaced, active position is indicated by dashed lines 22. [0025] A hydraulic actuator 23 is proposed in order to move the nozzle 18 towards the head of the instrument 11. That actuator consists, for example, of a metallic piston 24, bordering at least one side of a fluid chamber 25. Preferably, the fluid chamber 25 consists of an electrically insulating material, preferably a synthetic material, or is differently insulated from the outside. [0026] In this exemplary embodiment, for example, the fluid chamber 25 is a cylindrical chamber, for example, with a circular cross section. The displaceable plunger 24 stuck in this fluid layer 25 is preferably connected in rigid mode to the nozzle 18 and the tube 20, respectively, whose tube can be viewed - as well as the piston rod. Optionally the piston 24 is associated with a spring means 26, for example, in the form of a helical spring 27, which forces the piston 24, and thus the nozzle 18, in the retracted or passive position. A channel of the nozzle 28 extends through the nozzle 18 and the tube 20, respectively, as well as through the piston 24, whereby the fluid to be ejected through the nozzle 18 reaches the orifice of the nozzle through said channel. [0027] Optionally, however, and preferably, the nozzle 18 is associated with a control valve 29. This valve comprises at least two valve settings, that is, closed and open valve. The valve 29 is interposed between the nozzle channel 28 and the channel 17. In the present exemplary embodiment, the said valve is controlled by means of an electrical line 30, this line extending through the channel 17 of the instrument head 11 to the connector body of the instrument 12. Line 30 can be a flexible insulating wire. However, line 30 can also be a flexible non-insulating electrical conductor, which is in electrical contact with the electrolyte present in channel 17. [0028] The connector body of the instrument 12 comprises a regulating device 21, which may be a pump device, which, when activated, is preferably arranged to move a previously specified amount of fluid and to transport that fluid through the channel 17 for the instrument head 11. For example, this regulator device 31 is represented by a plunger 32 that is slidably supported in a hole, where that plunger can be used to supply a pressure P2 to the fluid column positioned in channel 17. The actuator element 13 can be used, for example, to slide the plunger 32 back and forth, said actuator element being manually operated by the surgeon. However, it is also possible to propose other devices such as withdrawn or similar magnets. [0029] The instrument 10 is connected to an apparatus which is not shown specifically in figure 1. This apparatus comprises a device in the form of a pump device 33 being schematically illustrated in Figure 1, said pump device used to transport the device. fluid, for example, NaCl solution for introducing the nozzle 34 of a first supply 34 into the body of the instrument connector 12 and from there via the fluid conducting element 15 - to the head of the instrument 11 and therefore to the nozzle 18. For the control of the flow of fluid supply to or into the channel 17, a valve can be obtained which can be opened by means of an actuating element 14, for example, manually. The pump device 33 preferably uses a transport pressure P1 arranged to generate the jet of fluid exiting the nozzle 18. [0030] Line 30 can be used to connect valve 14 to valve 29 in order to control valve 29. In this way, valve 29 can be opened whenever the respective fluid is moved under pressure to channel 17 by means of the element active 14. [0031] Optionally, instrument 10 can, in addition, act as an HF surgical instrument, and, to accomplish this, be connected to an HF power phone or an HF voltage source. This HF 36 voltage source can be part of an apparatus that is not specifically illustrated by said apparatus supplying the instrument 10 with HF energy. The HF voltage source 36 is connected to a neutral electrode 37, on the one hand, the neutral electrode being preferably connected to a neutral electrode 37, on the other hand, said neutral electrode being preferably connected to the patient in a large surface, and to the instrument connector body 12, on the other hand, whereby the HF voltage is conducted to the instrument head 11 via said instrument connector body. Again, this can be accomplished by line 30, extending through the fluid-conducting element 15. Alternatively, the line 30 can also be embedded in the wall of the fluid-conducting element 15. [0032] In surgical use, at least the instrument head 11 and part of the fluid-conducting element 15 of the instrument head 10 are inserted into the body cavity or tissue of a patient, this can be done by endoscopy, by laparoscopy, or even in the open surgical field. When the instrument 10 is being inserted, the nozzle 18 is in the retracted position in which the thin needle-like tube 20 is positioned, at least partially protected inside the head of the instrument 11 [0033] When the nozzle 18 must be activated, it is moved to the front position. For this, the surgeon activates the actuating element 13. In this aspect, the surgeon moves the plunger 32 forward, in order to displace fluid. In other words: The regulating device 31 (or other suitable pump device) is activated and thus pushes the plunger 24 - via coupling the fluid column in channel 17 - against the force of the spring medium 26 in the distal direction. The nozzle 18, which has been moved forward to this point, can now be electrically activated or technically flow. [0034] For the electrical actuation, the HF generator 36 is actuated, for example, by a foot or hand switch or others, so that the nozzle 18 injects an HF chain - and its outer jacket or in parts of it and / or on its front surface - for the fabric. In figure 1, left side, this current is indicated by divergent arrows IHF. [0035] The fluid-conducting medium 14 is activated by technical actuation of fluid. For this purpose, additional electrolytes, for example, NaCl solution, are transported to channel 17. At the same time, valve 29 is opened via line 30, so that a jet of fluid can come out of nozzle 18 and cause the desired effect. At the same time, the surgeon must secure the actuating element 13 in the forward displaced position or lock that element in the frontal position. [0036] Valve 29 can be selectively activated, depending on various events, being controlled via different mechanisms. Depending on the modality, line 30, for example, can be a multi-wire line. Next, a first wire is arranged to actuate valve 29, for example, as a function of actuation of element 14 or to open valve 35. which at this point can act as a switch. Alternatively, valve 29 can be controlled via a separate actuating element. [0037] Figure 2 shows a modified modality of the instrument 100 according to the invention. To the extent that structural or functionally identical or similar elements are obtained, reference is made to the above description using the same reference signs. Unlike the aforementioned modality, line 30 here is only available for the control of valve 29. Line 30 can therefore be a single wire line, which is controlled, for example, by a fluid pressure switch 39, placed with the purpose of detecting whether the fluid pressure in channel 17 is or is not exceeding a previous pressure limit. Figure 2 shows the fluid pressure switch 39 symbolically combined with the test valve 35. Alternatively, a separate switch can be obtained, which responds to the actuation of the actuating element 14. [0038] In the exemplary embodiment of figure 2, the electrically conductive fluid present in channel 17 is arranged to supply HF current to the nozzle 18. [0039] Preferably, the hydraulic fluid is a physiological solution of table salt with sufficient electrical conductivity. In the connector body of the instrument 12, this table salt solution is in electrical connection with a current supply line HF 40 and, in the head of the instrument 11, this table salt solution is in connection with the plunger 24 and thus, with the nozzle 18. In addition, Figure 2 shows a switch 41 for controlling the HF 36 voltage source. Switch 41 is shown symbolically as a switch on line 40. Alternatively, however, this switch can control still, directly the source of HF 36. [0040] Figure 3 shows another modified modality of instrument 210. To the extent that its elements have the same structural and / or functional characteristics as the elements of the modalities described above, reference is made to the description above using the reference signs already introduced. The main characteristic of instrument 210 is the actuation of valve 29, due to the hydraulic pressure in channel 17. The source of HF for the plunger 24 and from there to the nozzle 18 can be rewired, as shown, by the electrolyte (as in figure 2) or I still saw a non-illustrated line (as in Figure 1). The valve 29 is configured in such a way as to open the connection between channel 17 and the nozzle channel 28, when the hydraulic pressure in channel 17 exceeds a limit value. If the surgeon activates the instrument 210 by the action of the actuating element 14, the pump device 33 transports high pressure fluid to the channel 17 and opens the valve 29 as soon as sufficient pressure has accumulated, as a result, a strong jet is of the nozzle 18 in the S direction. In this respect, the nozzle 18 remains in the actuated position, in front displacement. After closing the valve 35, for example, when the operator releases the actuating element 14, the valve 29 closes, in which case the nozzle 18 remains displaced forward, as long as the plunger 32 is kept in the forward displaced position. . [0041] If the surgeon or operator releases the actuating element 13, the spring 27 pushes the plunger 24 back to the stowed position. Thus, the plunger 32 also returns to its right retracted position as illustrated in Figure 3. [0042] Another possible modality of the instrument according to the invention is shown as instrument 310 in figure 4. This instrument 310 does not require a valve 29. In addition to the first fluid conducting element 15, said instrument comprises a second conducting element of fluid 42 configured, for example, as a hose 543. The fluid conducting element 42 can extend through channel 17 of the first fluid conducting element. The fluid-conducting element 42 can be connected to the plunger 24 or an extension of that fluid-conducting element. The internal channel 44 of the fluid-conducting element 42 therefore communicates with the nozzle channel 28. The proximal end of the fluid-conducting element 42 can be connected to the pump device 33 by means of a valve controlled by the actuating element 14 , and, for example, by means of test valve 35. In this embodiment, test valve 35 is optional. However, in this case, channel 17 is only arranged to activate the plunger 24 or another actuator 23, channel 44 is obtained to supply the nozzle 18. The supply (optional) of the HF current to the nozzle 18 can occur, as seen in Figure 4, via conductive electrolyte in channel 17, or, for example, as in Figure 1, via a separate electrical conductor. The latter, in turn, can be arranged on the wall of the hose 16 or extend through the internal channel 17. It is also possible to combine the line not shown specifically with the internal hose 43. Unlike this, the previous description applies equally. [0043] A surgical instrument, 10, 110, 210, 310 arranged to perform surgical operations with a water jet comprises a nozzle 18 that can be moved by means of a hydraulic actuator 23 out of a retracted or passive position to a forward position or active. The actuation is performed by means of a hydraulic fluid supplied to the instrument head 11 via a tube 20 and / or a hose 43. The fluid, for example, a sodium chloride solution that will be injected into the tissue can be used as the fluid hydraulic supplied to the nozzle 18. Preferably, the HF current can also be applied to the nozzle 18. [0044] Said HF current can be conducted to the nozzle via a line that extends through the fluid conducting element 15 or via the electrolyte present there. List of reference numbers 10, 100, 210, 310 Instrument 11 Instrument head 12 Connector 13, 14 Active elements 15 First fluid conducting element 16 Hose 17 Channel 18 Nozzle 19 Arrow 20 Tube 21 Nozzle body 22 dashed lines - active position of the nozzle 18 23 Actuator 24 piston 25 Fluid chamber 26 Spring means 27 Helical spring 28 Nozzle channel 29, 29a Valve 30 Line 31 Regulator device 32 Plunger 33 Pump device 34 Supply 35 Test valve 36 HF voltage source 37 Neutral electrode 39 Pressure switch 40 Line 41 Switch 42 Second fluid-conducting element 43 Hose 44 42 S channel Jet direction
权利要求:
Claims (14) [0001] 1. Surgical instrument (10, 100, 210, 310) for waterjet surgery combined with an instrument connection body (12), with an instrument head (11), on which a nozzle (18) is arranged to be movable back and forth between at least two positions, with a first fluid supply element (15), by means of which the instrument head (11) is connected to the instrument connection body (12), with a actuator (23) disposed on the instrument head (11) and being connected to the nozzle (18) and comprising a fluid chamber (25), in which the first fluid conducting element (15) which is in fluid communication with the fluid (25), in which the regulating device (31) is provided on or over the connecting body of the instrument (12), characterized in that the regulating device is provided for hydraulic operation of the actuator (23), so that the nozzle is movable back and forth between at least two positions by the actuator. [0002] An instrument according to claim 1, characterized in that the nozzle (18) is linearly supported so as to be displaceable along a jet direction (S) indicated by said nozzle. [0003] Instrument according to any one of the preceding claims, characterized in that the actuator (23) and / or nozzle (18) is moved to a retracted position by the spring means (26). [0004] 4. Instrument according to claim 1, characterized in that the regulating device (31) is a pump. [0005] 5. Instrument according to any one of the preceding claims, characterized in that the nozzle (18) is connected to a source (36) for high frequency current. [0006] 6. Instrument according to any one of the preceding claims, characterized by the fact that an electric line (30) extends from the connector body of the instrument (12) to the nozzle (18). [0007] 7. Instrument according to claim 6, characterized in that the electric line (30) is an electrolyte present in the first fluid conducting element (15). [0008] Instrument according to any one of the preceding claims, characterized in that the nozzle (18) comprises a nozzle channel (28) and that the fluid chamber (25) is in fluid communication with the nozzle channel (28). [0009] Instrument according to any one of the preceding claims, characterized in that the nozzle (18) comprises a nozzle channel (28), which has a fluid communication for a second fluid-conducting element (42). [0010] An instrument according to any one of the preceding claims, characterized in that the first fluid-conducting element (15) communicates with a pump device (33) for a fluid that is under pressure. [0011] 11. Instrument according to claim 10, characterized in that the second fluid-conducting element (42) communicates with a pump device (33) for a fluid that is under pressure. [0012] 12. Instrument according to any one of the preceding claims, characterized in that the nozzle (18) is connected to a valve (29) arranged on the head of the instrument (11). [0013] 13. Instrument according to claim 12, characterized in that the valve (29) can be electrically controlled. [0014] 14. Instrument according to claim 12, characterized in that the valve (29) can be hydraulically controlled.
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引用文献:
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法律状态:
2013-10-29| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]| 2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]| 2019-10-15| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]| 2020-08-18| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]| 2020-12-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]| 2021-01-26| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 13/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
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申请号 | 申请日 | 专利标题 EP20110193542|EP2604202B1|2011-12-14|2011-12-14|Instrument for water jet surgery| EP11193542.5|2011-12-14| 相关专利
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