WO2011071655A1 - Systèmes et procédés pour dispositif de commande dynamique de soupape pneumatique - Google Patents

Systèmes et procédés pour dispositif de commande dynamique de soupape pneumatique Download PDF

Info

Publication number
WO2011071655A1
WO2011071655A1 PCT/US2010/056305 US2010056305W WO2011071655A1 WO 2011071655 A1 WO2011071655 A1 WO 2011071655A1 US 2010056305 W US2010056305 W US 2010056305W WO 2011071655 A1 WO2011071655 A1 WO 2011071655A1
Authority
WO
WIPO (PCT)
Prior art keywords
port
valve
differential pressure
pressure
controller
Prior art date
Application number
PCT/US2010/056305
Other languages
English (en)
Inventor
Shawn X. Gao
Mark A. Hopkins
Original Assignee
Alcon Research, Ltd.
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
Application filed by Alcon Research, Ltd. filed Critical Alcon Research, Ltd.
Priority to CA2781157A priority Critical patent/CA2781157C/fr
Priority to JP2012543127A priority patent/JP5711259B2/ja
Priority to BR112012013974-6A priority patent/BR112012013974B1/pt
Priority to CN201080055636.6A priority patent/CN102652006B/zh
Priority to EP20100779886 priority patent/EP2509549B1/fr
Priority to ES10779886T priority patent/ES2442368T3/es
Priority to AU2010328590A priority patent/AU2010328590B2/en
Priority to RU2012128873/14A priority patent/RU2556529C2/ru
Publication of WO2011071655A1 publication Critical patent/WO2011071655A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00861—Methods or devices for eye surgery using laser adapted for treatment at a particular location
    • A61F2009/00874—Vitreous
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7761—Electrically actuated valve

Definitions

  • the present invention generally pertains to a pneumatic surgical system. More particularly, but not by way of limitation, the present invention pertains to surgical system pneumatic generation.
  • Vitreo-retinal procedures may include a variety of surgical procedures performed to restore, preserve, and enhance vision. Vitreo-retinal procedures may be appropriate to treat many serious conditions of the back of the eye. Vitreo-retinal procedures may treat conditions such as age-related macular degeneration (AMD), diabetic retinopathy and diabetic vitreous hemorrhage, macular hole, retinal detachment, epiretinal membrane, CMV retinitis, and many other ophthalmic conditions.
  • AMD age-related macular degeneration
  • diabetic retinopathy and diabetic vitreous hemorrhage macular hole
  • retinal detachment epiretinal membrane
  • CMV retinitis CMV retinitis
  • the vitreous is a normally clear, gel-like substance that fills the center of the eye. It may make up approximately 2/3 of the eye's volume, giving it form and shape before birth. Certain problems affecting the back of the eye may require a vitrectomy, or surgical removal of the vitreous.
  • a vitrectomy may be performed to clear blood and debris from the eye, to remove scar tissue, or to alleviate traction on the retina.
  • Blood, inflammatory cells, debris, and scar tissue may obscure light as it passes through the eye to the retina, resulting in blurred vision.
  • the vitreous may also be removed if it is pulling or tugging the retina from its normal position.
  • Some of the most common eye conditions that require vitrectomy include complications from diabetic retinopathy such as retinal detachment or bleeding, macular hole, retinal detachment, pre-retinal membrane fibrosis, bleeding inside the eye (vitreous hemorrhage), injury or infection, and certain problems related to previous eye surgery.
  • the retinal surgeon may perform a vitrectomy with a microscope and special lenses designed to provide a clear image of the back of the eye. Several tiny incisions just a few millimeters in length may be made on the sclera.
  • the retinal surgeon may insert microsurgical instruments through the incisions such as a fiber optic light source to illuminate inside the eye, an infusion line to maintain the eye's shape during surgery, and instruments to cut and remove the vitreous.
  • the surgeon may create three tiny incisions in the eye for three separate instruments. These incisions may be placed in the pars plana of the eye, which is located just behind the iris but in front of the retina.
  • the instruments which pass through these incisions may include a light pipe, an infusion port, and the vitrectomy cutting device.
  • the light pipe is the equivalent of a microscopic high- intensity flashlight for use within the eye.
  • the infusion port may be used to replace fluid in the eye and maintain proper pressure within the eye.
  • the vitrector, or cutting device may work like a tiny guillotine, with an oscillating microscopic cutter to remove the vitreous gel in a controlled fashion. This may prevent significant traction on the retina during the removal of the vitreous humor.
  • Such an ophthalmic surgical machine includes a main console to which the numerous different tools are attached.
  • the main console may provide power to and control the operation of the attached tools.
  • the attached tools typically include probes, scissors, forceps, illuminators, vitrectors, and infusion lines. Each of these tools is typically attached to the main surgical console. A computer in the main surgical console may monitor and control the operation of these tools. These tools may also get their power from the main surgical console. Some of these tools may be electrically powered while others may be pneumatically powered.
  • the main surgical console may include a pneumatic or air distribution module.
  • This pneumatic module may condition and supply compressed air or gas to power the tools.
  • the pneumatic module may be connected to a cylinder that contains compressed gas.
  • the pneumatic module may provide the proper gas pressure to operate the attached tools properly.
  • a pneumatic system valve for a surgical console may be controlled by a controller configured to adjust a valve duty cycle (VDC) (the VDC being used to energize the valve) to reduce a difference between a differential pressure (e.g., an average differential pressure) at the valve's output and a desired differential pressure (e.g., a desired average differential pressure).
  • VDC valve duty cycle
  • average differential pressures may be detected and relayed from a pressure sensor, coupled to one or more ports of the valve, to the controller (e.g., implementing a PID controller (Proportional-Integral-Derivative controller) algorithm).
  • the controller may compare the measured average differential pressure against the desired average differential pressure (e.g., received from the user or determined based on information received from the user). The controller may then determine a modified VDC to reduce a difference between the desired average differential pressure and the measured average differential pressure. In some embodiments, multiple iterations may be performed to reduce the difference between the measured average differential pressure and the desired average differential pressure.
  • FIG. 1 is surgical console, according to an embodiment
  • FIG. 2a is diagram of a pneumatic system with a differential pressure sensor, according to an embodiment
  • FIG. 2b is diagram of a pneumatic system with separate pressure sensors on each port, according to an embodiment
  • FIG. 3 illustrates a vitrectomy cutter, according to an embodiment
  • FIG. 4 illustrates a flowchart of a method for controlling a pneumatic valve, according to an embodiment
  • FIG. 5 illustrates an embodiment of a look-up table for correlating port duty cycle with average differential pressure, according to an embodiment
  • FIG. 6 illustrates an embodiment with a pneumatic valve including two or more valves. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are intended to provide a further explanation of the present invention as claimed. DETAILED DESCRIPTION OF THE EMBODIMENTS
  • FIG. 1 illustrates an embodiment of a surgical console 101 for a pneumatically powered ophthalmic surgical machine.
  • the surgical console 101 may be configured to drive one or more pneumatic tools 103.
  • the tools 103 may include, for example, scissors, vitrectors, forceps, and injection or extraction modules. Other tools 103 may also be used.
  • the pneumatically powered ophthalmic surgery machine of FIG. 1 may operate to assist a surgeon in performing various ophthalmic surgical procedures, such as a vitrectomy.
  • a compressed gas, such as nitrogen, may provide the power through the surgical console 101 to power tools 103.
  • the surgical console 101 may include a display 109 for displaying information to a user (the display may also incorporate a touchscreen for receiving user input).
  • the surgical console 101 may also include a fluidics module 105 (e.g., to support irrigation/aspiration functions) and one or more port connectors 107 for coupling to tools 103 (e.g., coupling through pneumatic lines attached to the tools 103).
  • a fluidics module 105 e.g., to support irrigation/aspiration functions
  • one or more port connectors 107 for coupling to tools 103 (e.g., coupling through pneumatic lines attached to the tools 103).
  • FIG. 2 is a schematic of a pneumatic system for a pneumatically powered vitrectomy machine, according to an embodiment.
  • the pneumatic system may include one or more pneumatic valves 217 coupling a pressure source 209 (e.g., a regulated pressure source such as an air cylinder or a wall outlet air supply) to output port A 213 and output port B 215 (the output port A 213 and output port B 215 may be coupled to the tool 103 through one or more port connectors 107).
  • the pneumatic valve 217 may be controlled by controller 205.
  • the pressure of the pressure source 209 may also be regulated by controller 205 or a separate controller (e.g., internal to the surgical console 101 ).
  • the controller 205 may regulate pressure (e.g., to balance between lower pressures for reducing air consumption and higher pressures for faster cut rates and/or to increase a dynamic range of available cut rates).
  • the components of the pneumatic system may be incorporated in a manifold (e.g., machined out of a metal, such as aluminum).
  • the manifold may be air tight, and include various fittings and couplings, and be capable of withstanding relatively high gas pressures.
  • the manifolds may be manufactured as individual pieces or they may be manufactured as a single piece.
  • the components of the pneumatic system (e.g., in the manifold) may be incorporated inside the surgical console 101.
  • pneumatic valve 217 may be a four-way valve. Other valve configurations are also contemplated.
  • the valve 217 may include a solenoid that operates to move the valve 217 to one of the two positions (e.g., see FIGs. 2a-b) as directed by control signals from controller 205.
  • pneumatic valve 217 may allow pressurized gas to pass through pneumatic valve 217 to output port B 215 to provide pneumatic power to the probe cutter 225 while venting pressurized gas from output port A 213 through muffler 227.
  • the valve 217 may provide pressurized gas to output port A 213 and vent pressurized gas from output port B 215.
  • pressurized gas may pass through output port A 213 to provide pneumatic power to a tool 103 (e.g., probe cutter 225).
  • a tool 103 e.g., probe cutter 225.
  • the first chamber 229 of the dual chambers 223 may be charged while the second chamber 231 may be discharged.
  • the second chamber 231 may be charged while the first chamber 229 may be discharged.
  • the probe cutter 225 may act as a cutting device.
  • the probe cutter 225 may reciprocate inside an outer tube 303 with a cutter port 301 (e.g., the probe cutter 225 may be moved by a diaphragm 221 that in turn oscillates as pressurized gas is alternately directed to output ports A and B (and into respective chambers of the dual chamber 223)).
  • probe cutter 225 may be attached to output ports A and B through tube 219 (separate tubes for each port may also be used).
  • the probe cutter 225 may alternately open and close cutter port 301 with a sharpened tip of the probe cutter 225.
  • Each cycle of the probe cutter 225 through outer tube 303 may cut through material such as vitreous in the cutter port 301 as the probe cutter 225 is closing.
  • a port duty cycle may indicate the amount of time the cutter port 301 is open and closed. For example, a PDC of 49% may indicate the cutter port 301 is open 49% of the cycle time (and closed 51% of the cycle time - the cycle time being, for example, the amount of time between each successive opening of the cutter port 301).
  • valve duty cycle may include the amount of time the pneumatic valve 217 is in the first and second positions.
  • a cut rate of the probe cutter 225 may be controlled by the controller 205 through valve 217. For example, to provide a 2500 cuts per minute probe rate, controller 205 may direct pneumatic valve 217 to provide pressurized air alternately to port A (second channel) and port B (first channel) at a rate of approximately 24 ms per cycle.
  • a transition time to actually open and close the channels may use part of the cycle time.
  • pneumatic second channel i.e., via port A 213 of pneumatic valve 217) may take 4 ms to open (while pneumatic first channel is closing) and 2 ms to close (while pneumatic first channel is opening) for a total transition time per 24 ms cycle of 6 ms.
  • Other transition times are also contemplated.
  • the valve may actually be open only 8 ms (12 ms - 4 ms) to second channel while closed to first channel and may be closed for 10 ms (12 ms - 2 ms) to second channel while open to first channel.
  • This valve timing difference of 8 ms vs. 10 ms in providing pressurized air to second channel and first channel may result in an unbalanced pressure differential in the two channels.
  • it may be desirable for the open time durations of the two channels to be approximately the same (e.g., in the case of 2500 cuts/minute, actually open for approximately (24 ms - 6 ms) 1 2 9 ms).
  • the controller 205 could be preprogrammed with a fixed valve duty cycle to achieve approximately equal actual open time durations for both channels based on a standard pneumatic valve 217.
  • the nominal open time may be set to 13 ms for second channel and 1 1 ms for first channel.
  • a fixed valve duty cycle may not successfully counter the imbalance.
  • a different valve may take 3 ms (instead of 4 ms) to open the second channel (while the pneumatic first channel is closing) and 2 ms to close the second channel (while the pneumatic first channel is opening).
  • valve duty cycle e.g., 13 ms nominal open time for the second channel and 1 1 ms nominal open time for the first channel
  • a fixed valve duty cycle may not successfully counter the imbalance caused by the flow restriction/resistance variations in the two channels from console to console.
  • the effects of the valve variation may be dynamically compensated by monitoring the pressure waveform (e.g., the average differential pressures 207 detected over the run time of the valve by pressure sensor 21 1 (FIG. 2a) or calculated by the controller using pressure information from pressure sensors 212a,b (FIG. 2b)) at the output of the valve 217.
  • Pressure information may include, for example, detected pressure waveforms at the pressure sensors 212a,b or average pressure readings from the pressure sensors 212a,b (other pressure information is also possible).
  • the pressure sensors 21 1, 212a,b may include a pressure transducer capable of reading pressure of a compressed gas and sending an electrical signal containing information about the pressure of the compressed gas to the controller 205.
  • the pressure waveform (which may be indicative of the actual VDC) may be monitored (e.g., periodically or continuously monitored) during the run time.
  • the average differential pressures 207 may be used by the controller 205 to compensate for valve variations by modifying the VDC of the valve to reduce a difference between the actual differential pressures and a desired differential pressure.
  • a close-loop approach may include monitoring an average of a differential pressure at the output of the pneumatic valve 217 (differential pressure between port A 213 and port B 215) and using the average differential 207 to determine valve specific information for use in controlling the VDC.
  • the average differential pressure 207 over a cycle period (1 / cutrate) may be directly related to the VDC and may be used by the controller 205 to dynamically adjust the VDC of the control signal sent to the pneumatic valve 217.
  • an actual differential pressure may not be calculated, but instead the controller may compare pressure information from the pressure sensors 212a,b to dynamically adjust the VDC. For example, a comparison of the pressure waveforms (or average pressures) from port A and port B may indicate a difference that can be countered by adjusting the VDC. Other VDC adjustments are also possible.
  • a desired differential pressure (between port A and port B) may be determined based on user input (e.g., received through a user interface of the surgical console) or a system default stored in a memory on the surgical console 101 prior to valve operation.
  • the controller 205 may modify the valve duty cycle of the valve 217 based on a detected/calculated actual differential pressure.
  • pressure sensor 21 1 may detect a pressure difference between port A 213 and port B 215 and send a signal indicative of the pressure difference to controller 205.
  • the pressure sensor 21 1 may calculate the average differential pressure 207 based on a detected differential pressure waveform or the pressure sensor 21 1 may relay the detected differential pressure waveform to the controller 205 and the controller 205 may determine the average differential pressure 207. In some embodiments, the average differential pressure 207 may be sent to the controller 205 as a signal that the controller 205 may interpret to derive the pressure (or, for example, use to derive other values related to pressure). While one pressure sensor 21 1 is shown in FIG. 2a, in some embodiments (e.g., as seen in FIG. 2b), each of port A 213 and port B 215 may have a separate pressure sensor (pressure sensors 212a,b) that may communicate with the controller 205.
  • the controller may receive pressure information from the pressure sensors 212a,b, calculate a differential waveform between the two ports and then determine an average differential pressure from the differential waveform.
  • the controller may determine the offset of each pressure sensor output waveform to be used for controlling the valve duty cycle of the valve 217 (e.g., the controller may compare pressure information from the pressure sensors 212a,b to determine an average difference between the two port pressures). These differential pressures/ average pressure differences may be used to determine how to dynamically adjust the VDC.
  • the controller 205 may determine time intervals (corresponding to a modified valve duty cycle) to signal valve 217 to be in the first and second positions in order to achieve the desired average differential pressure between port A and port B.
  • a modified valve duty cycle By applying an adjusted valve duty cycle to the cycle times for the pneumatic channels, the pneumatic channels may be actuated during the total cycle time to specific actual open times.
  • a 50% valve duty cycle may correspond to applying a signal (i.e., to energize the valve into the first position) for approximately the same amount of time as the signal is not applied (i.e., to de- energize the valve into the second position).
  • An adjustment of 1% may result in a 51% valve duty cycle that corresponds to applying a signal to energize (i.e., to the first position) the valve for approximately 51% of the total cycle time (and 49% of the total time no signal is applied (to put the valve into the second position)).
  • the longer 51% valve duty cycle may thus compensate, for example, for a valve that takes longer to move into the first position than it does to move into the second position and or a console that has higher flow restriction/resistance in the channel connecting to the first position of the valve.
  • the valve duty cycle may also be adjusted for various console characteristics (e.g., to compensate for the different transition times of various valves and flow restriction/resistance variations of various consoles).
  • controller 205 may be configured to receive signals from pressure sensor 21 1 (or pressure sensors 212a,b) via an electronic interface (e.g., electrical conductors such as wires, buses, traces, or the like). Controller 205 may also be configured to send output signals via an electronic interface to pneumatic valve 217. These output signals may allow controller 205 to control the operation of pneumatic valve 217. Controller 205 may include an integrated circuit capable of performing logic functions. In this manner, controller 205 may be in the form of a standard integrated circuit package with power, input, and output pins. In various embodiments, controller 205 may include a valve controller or a targeted device controller. In some embodiments, controller 205 may perform specific control functions targeted to a specific device, such as a valve.
  • an electronic interface e.g., electrical conductors such as wires, buses, traces, or the like. Controller 205 may also be configured to send output signals via an electronic interface to pneumatic valve 217. These output signals may allow controller 205 to control the operation of pneumatic valve 217. Controller
  • controller 205 may be a microprocessor. In such a case, controller 205 may be programmable so that it can function to control valves as well as other components of the console 101. In some embodiments, controller 205 is not a programmable microprocessor, but instead is a special purpose controller configured to control different valves that perform different functions.
  • FIG. 4 illustrates a flowchart of an embodiment of a method for dynamically controlling the pneumatic valve 217.
  • the elements provided in the flowchart are illustrative only. Various provided elements may be omitted, additional elements may be added, and/or various elements may be performed in a different order than provided below.
  • a user may select a desired cut rate and/or PDC (e.g., based on surgical needs). For example, the user may enter a cut rate of 2500 cuts per minute at a PDC of 50%.
  • the desired PDC may be translated into a desired average differential pressure (or other pressure differences/metrics related to the differential pressure between ports A and B).
  • the desired PDC may be translated into a desired average differential pressure based on a pre-established look-up table (e.g., see FIG. 5), equation, etc.
  • the user may enter the desired average differential pressure into an interface on display 103.
  • the PDC and the desired average differential pressure may be provided as a default value (e.g., 50% PDC, 0 psi (pounds per square inch) desired average differential pressure).
  • the average differential pressure may refer to an average differential pressure between port A and port B (taken as an average over time of the differential pressure waveform between port A and port B) or the difference between the port A average pressure and the port B average pressure.
  • PDC and corresponding average differential pressures may be determined experimentally, through trial and error, etc. for a valve. In some embodiments, other characteristics may be used to determine a desired average differential pressure (e.g., type of tool attached, etc).
  • the pneumatic valve 217 may be controlled by controller 205 to operate tool 103. In some embodiments, the controller 205 may initially control the valve 217 using a default valve duty cycle (e.g., 50%).
  • controller 205 may receive a desired average differential pressure from an offset translator 203 (e.g., an electronic circuit configured to convert a received electronic signal indicative of the desired PDC 201 into a corresponding desired average differential pressure based on an internal look-up table (e.g., see FIG. 5)).
  • controller 205 may receive other desired performance characteristics in addition to or in place of the desired average differential pressure (e.g., the controller may receive a desired difference between the average pressure waveforms from port A and port B or may receive a desired offset of port A pressure and port B pressure from a desired average pressure for the two ports).
  • average differential pressures 207 may be relayed from the pressure sensor 21 1 to the controller 205 (or calculated by the controller 205 using pressure information from pressure sensors 212a,b). For example, the average differential pressures 207 may be relayed by the pressure sensor 21 1 every 100 milliseconds (or pressure information (e.g., pressure offsets) may be relayed by pressure sensors 212a,b and the average differential pressure 207 may be calculated by the controller 205). Other time intervals are also contemplated (e.g., every 5 seconds).
  • the pressure sensor 21 1 may calculate the average differential pressure based on a detected differential pressure waveform or the pressure sensor 21 1 may relay the detected differential pressure waveform (which may include one or more differential pressures between port A and port B) to the controller 205 and the controller 205 may determine the average differential pressure 207.
  • pressure sensors 212a,b coupled to ports A and B may relay detected pressure information (e.g., pressure offset, pressure waveform, etc.) to the controller 205 and the controller 205 may determine the average differential pressure for the ports (or may compare the pressure waveforms without actually calculating the average differential pressure).
  • the controller 205 may compare the measured average differential pressure 207 (e.g., received from the pressure sensors or calculated using information from the pressure sensors) against the desired average differential pressure (e.g., calculated/determined from information received from the user or a default setting) and determine a modified VDC.
  • the controller 205 may determine a modified VDC to reduce a difference between the desired average differential pressure and the measured average differential pressure. For example, if the pressure at port A is taken as positive pressure and the pressure at port B is taken as negative pressure, then for an ideal valve, the measured average differential pressure may be 0 psi.
  • the measured average differential pressure may indicate that port A is actually staying open longer than port B during a given cycle (resulting in port A being charged to a higher pressure when open than port B charges to when open).
  • the VDC (which may indicate the percentage of the time the controller 205 signals port A to vent) may be increased by the controller 205 (e.g., from 50% to 51%). In some embodiments, the controller 205 may increase or decrease the VDC according to a default or user provided ratio.
  • the amount to adjust the VDC in response to the difference between the desired average differential pressure and the measured differential pressure may be experimentally determined for the valve 217. For example, it may be experimentally determined to increase VDC by 1% for every + 1.2 psi difference between the measured average differential pressure and the desired average differential pressure (other ratios are also contemplated). This information may be stored in equation or table form accessible to the controller 205. As another example, the controller 205 may increase the VDC by a user provided increment (such as 0.5%) if the average differential pressure is positive and decrease the VDC by the user provided increment if the average differential pressure is negative.
  • the controller 205 may not adjust the VDC if the measured average differential pressure is within a default or user provided range (e.g., no adjustment if the average differential pressure is within 1 psi of the desired average differential pressure).
  • the user may enter various inputs for the controller's use (e.g., input into the touchscreen of display 109). For example, the user may enter a ratio of -1 % VDC for every + 1.2 psi difference between the measured average differential pressure and the desired average differential pressure.
  • the controller may not actually calculate differential pressures, but may instead compare pressure waveforms from port A and B (e.g., as determined by pressure sensors 212a,b) to each other or to desired waveforms to determine how to adjust the VDC. For example, if the pressure waveform for port A is, on average, 2 psi greater than a desired pressure waveform (e.g., as stored on the system), the VDC may be adjusted without having to actually calculate the differential pressure. Other VDC adjustment techniques are also contemplated.
  • the controller 205 may use the modified VDC in energizing the pneumatic valve 217 (e.g., to time the switch between the first/second positions).
  • the controller 205 may iterate between comparing the measured average differential pressure 207 against the desired average differential pressure (or related differential pressure variables/metrics) and determining a new modified VDC to minimize a difference between the measured average differential pressure 207 and the desired average differential pressure.
  • the controller 205 may implement a P1D controller algorithm (Proportional-Integral-Derivative) to adjust the valve duty cycle upward or downward, receive a new detected average differential pressure (or receive new pressure information to use in calculating the average differential pressure), adjust the valve duty cycle correspondingly upward or downward based on the direction of the new average differential pressure as compared to the previous average differential pressure, receive/calculate a new average differential pressure in response to the modified valve duty cycle, etc.
  • P1D controller algorithm Proportional-Integral-Derivative
  • the pneumatic management system may include one or more processors.
  • the processor may include single processing devices or a plurality of processing devices.
  • a processing device may be a microprocessor, controller (e.g., controller 205) (which may be a micro-controller), digital signal processor, microcomputer, central processing unit, field programmable gate array, programmable logic device, state machine, logic circuitry, control circuitry, analog circuitry, digital circuitry, and/or any device that manipulates signals (analog and/or digital) based on operational instructions.
  • a memory coupled to and/or embedded in the processors may be a single memory device or a plurality of memory devices.
  • Such a memory device may be a read-only memory, random access memory, volatile memory, non-volatile memory, static memory, dynamic memory, flash memory, cache memory, and/or any device that stores digital information.
  • the processors implement one or more of its functions via a state machine, analog circuitry, digital circuitry, and/or logic circuitry
  • the memory storing the corresponding operational instructions may be embedded within, or external to, the circuitry comprising the state machine, analog circuitry, digital circuitry, and/or logic circuitry.
  • the memory may store, and the processor may execute, operational instructions corresponding to at least some of the elements illustrated and described in association with the figures.
  • first port and the "second port” described with respect to a four-way pneumatic valve may instead be coupled to two or more separate valves (i.e., the "first port” coupled to a first valve and the "second port” coupled to a second valve).
  • the first valve and second valve may be controlled together to provide pressurized gas alternately to the first port and the second port.
  • a pressure sensor may be coupled to both the first port and the second port to determine a differential pressure (or each port may be coupled to a separate pressure sensor and the separate pressures may be used in determining the average pressure).
  • the valve duty cycle may then be used relative to the two or more valves to adjust the channel open and close times of their respective ports (by controlling the separate valves according to the open/close times indicated by the valve duty cycle).

Abstract

Selon les divers modes de réalisation, l'invention porte sur une soupape de système pneumatique pour console chirurgicale pouvant être commandée par un dispositif de commande configuré pour régler un cycle d'utilisation de soupape (VDC) de la soupape afin de réduire une différence entre la pression différentielle de la soupape et une pression différentielle souhaitée. Dans certains modes de réalisation, les pressions différentielles moyennes peuvent être détectées et relayées au dispositif de commande par un capteur de pression, couplé à un ou plusieurs orifices de la soupape. Le dispositif de commande peut comparer la pression différentielle moyenne mesurée à la pression différentielle moyenne souhaitée (par exemple reçue à partir de l'utilisateur). Le dispositif de commande peut déterminer ensuite un cycle d'utilisation de soupape (VDC) modifié afin de réduire une différence entre la pression différentielle moyenne souhaitée et la pression différentielle moyenne mesurée. Dans certains modes de réalisation, on peut déterminer la pression différentielle moyenne souhaitée sur la base d'une entrée reçue à partir d'un utilisateur de la console chirurgicale.
PCT/US2010/056305 2009-12-10 2010-11-11 Systèmes et procédés pour dispositif de commande dynamique de soupape pneumatique WO2011071655A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
CA2781157A CA2781157C (fr) 2009-12-10 2010-11-11 Systemes et procedes pour dispositif de commande dynamique de soupape pneumatique
JP2012543127A JP5711259B2 (ja) 2009-12-10 2010-11-11 動的空気圧弁駆動装置のためのシステム及び方法
BR112012013974-6A BR112012013974B1 (pt) 2009-12-10 2010-11-11 console cirúrgico para uma máquina cirúrgica energizada pneumaticamente e método para ajustar uma válvula de sistema pneumático cirúrgico
CN201080055636.6A CN102652006B (zh) 2009-12-10 2010-11-11 用于动态气动阀驱动器的系统和方法
EP20100779886 EP2509549B1 (fr) 2009-12-10 2010-11-11 Systèmes et procédés pour dispositif de commande dynamique de soupape pneumatique
ES10779886T ES2442368T3 (es) 2009-12-10 2010-11-11 Sistemas y procedimientos para accionador de válvula neumático dinámico
AU2010328590A AU2010328590B2 (en) 2009-12-10 2010-11-11 Systems and methods for dynamic pneumatic valve driver
RU2012128873/14A RU2556529C2 (ru) 2009-12-10 2010-11-11 Система и способы для динамического привода пневматического клапана

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28524309P 2009-12-10 2009-12-10
US61/285,243 2009-12-10

Publications (1)

Publication Number Publication Date
WO2011071655A1 true WO2011071655A1 (fr) 2011-06-16

Family

ID=43530666

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/056305 WO2011071655A1 (fr) 2009-12-10 2010-11-11 Systèmes et procédés pour dispositif de commande dynamique de soupape pneumatique

Country Status (10)

Country Link
US (1) US8728108B2 (fr)
EP (1) EP2509549B1 (fr)
JP (1) JP5711259B2 (fr)
CN (1) CN102652006B (fr)
AU (1) AU2010328590B2 (fr)
BR (1) BR112012013974B1 (fr)
CA (1) CA2781157C (fr)
ES (1) ES2442368T3 (fr)
RU (1) RU2556529C2 (fr)
WO (1) WO2011071655A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8728108B2 (en) 2009-12-10 2014-05-20 Alcon Research, Ltd. Systems and methods for dynamic pneumatic valve driver
US8808318B2 (en) 2011-02-28 2014-08-19 Alcon Research, Ltd. Surgical probe with increased fluid flow
US8818564B2 (en) 2009-08-31 2014-08-26 Alcon Research, Ltd. Pneumatic pressure output control by drive valve duty cycle calibration
US8821524B2 (en) 2010-05-27 2014-09-02 Alcon Research, Ltd. Feedback control of on/off pneumatic actuators
US9060841B2 (en) 2011-08-31 2015-06-23 Alcon Research, Ltd. Enhanced flow vitrectomy probe

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008131357A1 (fr) 2007-04-20 2008-10-30 Doheny Eye Institute Centre chirurgical indépendant
US8568391B2 (en) 2007-04-20 2013-10-29 Doheny Eye Institute Sterile surgical tray
US8496681B2 (en) * 2011-06-06 2013-07-30 Synergetics, Inc. Systems and methods for vitrectomy
US8924028B2 (en) * 2011-08-01 2014-12-30 Control Microsystems, Inc. Battery-powered control valve and operation thereof
US8973595B2 (en) 2011-08-01 2015-03-10 Control Microsystems, Inc. Battery-powered control valve and operation thereof
AU2011374287B2 (en) * 2011-08-01 2017-07-20 Schneider Electric Systems Canada Inc. Battery-powered control valve and operation thereof
US10070990B2 (en) 2011-12-08 2018-09-11 Alcon Research, Ltd. Optimized pneumatic drive lines
WO2013180718A1 (fr) * 2012-05-31 2013-12-05 Medical Instrument Development Laboratories, Inc. Tube multi-étages pour lame chirurgicale pneumatique à vitesse rapide
US9629748B2 (en) 2012-05-31 2017-04-25 Medical Instrument Development Laboratories, Inc. Multi-stage tubing for high-speed pneumatic surgical cutter
US9924963B2 (en) * 2012-12-13 2018-03-27 Novartis Ag Vitrectomy probe with integral valve
US9271867B2 (en) * 2012-12-17 2016-03-01 Abbott Medical Optics Inc. Vitrectomy surgical apparatus with regulating of material processed
US9498376B2 (en) 2012-12-17 2016-11-22 Abbott Medical Optics Inc. Vitrectomy surgical apparatus with cut timing based on pressures encountered
US9486358B2 (en) * 2012-12-17 2016-11-08 Abbott Medical Optics Inc. Vitrectomy surgical apparatus
US9615969B2 (en) 2012-12-18 2017-04-11 Novartis Ag Multi-port vitrectomy probe with dual cutting edges
ITTO20130746A1 (it) * 2013-09-13 2015-03-14 Sinterleghe S R L Dispositivo di alimentazione per capsule elettrodo.
CA2946723A1 (fr) 2014-04-23 2015-10-29 Abbott Medical Optics Inc. Appareil chirurgical de vitrectomie utilisant une retroaction de pression a multiples capteurs
FR3022606B1 (fr) * 2014-06-19 2016-06-24 Continental Automotive France Procede de determination du point d'ouverture d'une vanne
US9693898B2 (en) 2014-11-19 2017-07-04 Novartis Ag Double-acting vitreous probe with contoured port
CN107438454B (zh) * 2015-04-13 2020-07-31 爱尔康公司 高速气动阀
US10458444B2 (en) * 2017-09-28 2019-10-29 Fisher Controls International Llc Optimized method for controlling position and crossover pressure in a double acting actuator
US11540942B2 (en) 2018-07-26 2023-01-03 Alcon Inc. Redundant pneumatic circuit for reliability enhancement of vitrectomy instruments
NL2022011B1 (en) * 2018-11-16 2020-05-26 Crea Ip B V Vitrectome actuator
US11642243B2 (en) 2018-12-10 2023-05-09 Alcon Inc. Methods of solenoid valve control optimization
JP2022529813A (ja) * 2019-04-24 2022-06-24 アルコン インコーポレイティド バルブ冷却及び騒音抑制
CA3151262A1 (fr) * 2019-10-30 2021-05-06 Daryl ANACLETO Connecteur pneumatique a double orifice
US11865040B2 (en) * 2021-05-10 2024-01-09 Bausch + Lomb Ireland Limited Vitrectomy cutter
CN113374921B (zh) * 2021-08-11 2021-10-29 山东柏源技术有限公司 用于油田管路流体压力的转换器控制系统
DE102022112103B4 (de) 2022-05-13 2024-01-04 Carl Zeiss Meditec Ag Konsole eines ophthalmochirurgischen Systems sowie ophthalmochirurgisches System zur Behandlung eines Auges
WO2024027902A1 (fr) * 2022-08-02 2024-02-08 Bausch + Lomb Ireland Limited Dispositif de coupe de vitrectomie
CN116301086B (zh) * 2023-05-16 2023-09-05 图湃(北京)医疗科技有限公司 玻璃体切割机、用于玻璃体切割机的监测方法及装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080149197A1 (en) 2006-12-21 2008-06-26 Denis Turner Pneumatic system for a vitrector
WO2008079526A2 (fr) * 2006-12-22 2008-07-03 Alcon Research, Ltd. Procédé d'actionnement d'un instrument microchirurgical

Family Cites Families (170)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US812162A (en) 1905-12-18 1906-02-06 Thomas Bemis Pneumatic tube for store service.
US2016746A (en) 1933-08-25 1935-10-08 Thomas H Ireland Fluid heater
NL73735C (fr) 1949-06-30
GB792397A (en) 1956-05-09 1958-03-26 Pneumatic Components Ltd Improvements in or relating to tyre inflation hose equipment
US3084674A (en) 1961-07-20 1963-04-09 Ingersoll Rand Co Pneumatic system for multiple nut runner
US3601588A (en) 1966-05-23 1971-08-24 Foxboro Co Method and apparatus for adaptive control
FR1506385A (fr) * 1966-09-16 1967-12-22 Sud Aviation Procédé d'atténuation et atténuateur électro-hydraulique de vibrations pour aérodyne à voilure tournante
US3515155A (en) 1967-02-24 1970-06-02 Air Reduction Gas mixture proportioner
US3646727A (en) 1969-06-02 1972-03-07 Erich A Wachsmuth Automatic compressor drain system
GB1281196A (en) 1969-11-20 1972-07-12 Westland Aircraft Ltd Improvements in or relating to pressure control systems
FR2117726B1 (fr) 1970-12-10 1973-12-07 Aquitaine Petrole
US3815604A (en) * 1972-06-19 1974-06-11 Malley C O Apparatus for intraocular surgery
US3867934A (en) 1973-05-04 1975-02-25 Veriflo Corp Pressure monitor for a lung ventilator
US3854382A (en) * 1973-06-20 1974-12-17 Sperry Rand Ltd Hydraulic actuator controls
GB1417299A (en) 1973-09-18 1975-12-10 Gulde Regelarmatuhren Kg Method and apparatus for safe-guarding pipe-lines against inadmissibly high internal pressure by a control valve with a pneumatic drive
US4011869A (en) * 1975-08-01 1977-03-15 David Kopf Instruments Tubular cutting instrument
GB1518720A (en) * 1975-11-21 1978-07-26 Ishikawajima Harima Heavy Ind Hydraulic servomechanism
US4077567A (en) 1976-06-18 1978-03-07 Universal Pneumatic Controls, Inc. Pneumatic temperature reset differential pressure controller
US4086804A (en) 1976-10-26 1978-05-02 Sperry Rand Corporation Precision pneumatic pressure supply system
US4323064A (en) 1976-10-26 1982-04-06 Puritan-Bennett Corporation Volume ventilator
US4168707A (en) 1977-06-13 1979-09-25 Douvas Nicholas G Control apparatus for microsurgical instruments
US4335867A (en) * 1977-10-06 1982-06-22 Bihlmaier John A Pneumatic-hydraulic actuator system
US4368734A (en) * 1978-01-27 1983-01-18 Surgical Design Corp. Surgical instrument
DE2811345C2 (de) 1978-03-16 1986-12-11 Knorr-Bremse AG, 8000 München Druckregler für pneumatische Drücke, insbesondere in Fahrzeugen
JPS5584858A (en) 1978-12-18 1980-06-26 Nippon Denso Co Ltd Engine control
US4373549A (en) * 1979-02-12 1983-02-15 Hewlett-Packard Company Mass flow/pressure control system
FR2455766B1 (fr) 1979-05-02 1985-09-06 Intertechnique Sa Dispositif et installation pneumatiques de creations de cycles de pression ou de debit
US4331130A (en) 1980-06-27 1982-05-25 Lewicky Andrew O Securing device to the cornea to prevent anterior chamber prolapse
US4590935A (en) 1981-11-02 1986-05-27 Optikon Oftalmologia, S.P.A. Control system for intraocular surgical device
GB2140871A (en) 1983-06-03 1984-12-05 Bowthorpe Hellermann Ltd Piston and cylinder actuator control
US4679583A (en) 1984-04-19 1987-07-14 Robertshaw Controls Company Pneumatic control system, control means therefor and method of making the same
BR8403165A (pt) 1984-06-28 1984-11-27 Jaime Roizenblatt Modulo pneumatico para microcirurgia intra-ocular
US4678459A (en) * 1984-07-23 1987-07-07 E-Z-Em, Inc. Irrigating, cutting and aspirating system for percutaneous surgery
US4706687A (en) 1985-02-28 1987-11-17 Alcon Instrumentation, Inc. Linear suction control system
US4757814A (en) 1985-02-28 1988-07-19 Alcon Laboratories, Inc. Proportional control for pneumatic cutting device
US4650462A (en) 1985-07-29 1987-03-17 Minnesota Mining And Manufacturing Company Irrigation system
US4770654A (en) 1985-09-26 1988-09-13 Alcon Laboratories Inc. Multimedia apparatus for driving powered surgical instruments
US4810242A (en) 1985-09-26 1989-03-07 Alcon Laboratories Inc. Surgical cassette proximity sensing and latching apparatus
US4622503A (en) 1985-09-26 1986-11-11 Medical Instrument Development Laboratories, Inc. Variable pneumatic output means for use with ophthalmic micro-surgical instruments
US4790816A (en) 1985-09-26 1988-12-13 Allon Laboratories, Inc. Surgical cassette proximity sensing and latching apparatus
US4696298A (en) * 1985-11-19 1987-09-29 Storz Instrument Company Vitrectomy cutting mechanism
US4840111A (en) 1986-01-31 1989-06-20 Moog Inc. Energy-conserving regenerative-flow valves for hydraulic servomotors
US4933843A (en) 1986-11-06 1990-06-12 Storz Instrument Company Control system for ophthalmic surgical instruments
DE3751904T2 (de) * 1987-03-18 1997-04-10 Monroe Auto Equipment Co Vorrichtung und verfahren zur absorbierung mechanischer stösse
DE3708989C2 (de) 1987-03-19 1993-10-14 Festo Kg Steuervorrichtung für einen in einem doppeltwirkenden Zylinder verschiebbaren Kolben
US5239861A (en) 1988-12-23 1993-08-31 Kabushiki Kaisha Komatsu Seisakusho Device for indicating contamination degree of hydraulic circuit and method of judging the contamination degree
US5092178A (en) * 1989-04-28 1992-03-03 Pneumo Abex Corporation Differential pressure sensor mechanisms
US5019035A (en) * 1989-06-07 1991-05-28 Alcon Surgical, Inc. Cutting assembly for surgical cutting instrument
US5106364A (en) * 1989-07-07 1992-04-21 Kabushiki Kaisha Topcon Surgical cutter
DE3925405A1 (de) 1989-08-01 1991-02-07 Vdo Schindling Drucksteuergeraet
US5020315A (en) * 1989-08-08 1991-06-04 United Technologies Corporation Multiple function fuel valve and system
US5024654A (en) * 1989-10-02 1991-06-18 Alcon Surgical, Inc. Insulated infusion and aspiration probe
US5417246A (en) 1989-10-27 1995-05-23 American Cyanamid Company Pneumatic controls for ophthalmic surgical system
US5176628A (en) 1989-10-27 1993-01-05 Alcon Surgical, Inc. Vitreous cutter
US5047008A (en) * 1989-10-27 1991-09-10 Storz Instrument Company Vitrectomy probe
US4985027A (en) * 1990-02-26 1991-01-15 Dressel Thomas D Soft tissue aspiration device and method
US5138564A (en) * 1990-07-31 1992-08-11 Xerox Corporation Automatic encoder calibration
US5094260A (en) 1990-10-26 1992-03-10 Alcon Surgical, Inc. Proportional valve and pressure control system
JPH06509258A (ja) 1991-07-31 1994-10-20 メントール　オーアンドオー　インコーポレイテッド 眼の手術におけるハンドピース動作制御
US5154207A (en) * 1991-08-02 1992-10-13 Mosier Industries, Inc. Pressure control valve and transducer package
FI90035C (fi) 1992-02-07 1993-12-27 Valmet Paper Machinery Inc Rullstoppare och foerfarande foer anvaendning daerav
US5217465A (en) * 1992-02-28 1993-06-08 Alcon Surgical, Inc. Flexible and steerable aspiration tip for microsurgery
DE4232586A1 (de) 1992-09-23 1994-03-24 Mannesmann Ag Relaisventil für fluidische Medien
DE4241846C2 (de) 1992-12-11 1996-09-26 Danfoss As Hydraulisches System
US5403276A (en) * 1993-02-16 1995-04-04 Danek Medical, Inc. Apparatus for minimally invasive tissue removal
US5403280A (en) * 1993-02-16 1995-04-04 Wang; James C. Inflatable perfusion catheter
US5829335A (en) 1993-05-11 1998-11-03 Mannesmann Rexroth Gmbh Control for hydraulic drive or actuator
DE4315626C1 (de) 1993-05-11 1994-07-14 Rexroth Mannesmann Gmbh Steuerung für einen hydraulischen Antrieb
JP2595450B2 (ja) * 1993-09-08 1997-04-02 日精樹脂工業株式会社 成形機における油圧系の異常検出方法およびその装置
US5550685A (en) * 1993-10-22 1996-08-27 Syquest Technology, Inc. Applying an adaptive feed-forward algorithm as a frequency selective filter in a closed loop disk drive servo system in order to compensate for periodic perturbations which otherwise appear in the servo system position error signal
US5380280A (en) * 1993-11-12 1995-01-10 Peterson; Erik W. Aspiration system having pressure-controlled and flow-controlled modes
US5457625A (en) * 1994-04-13 1995-10-10 The M. W. Kellogg Company Maximizing process production rates using permanent constraints
US5487725A (en) 1994-05-12 1996-01-30 Syntec, Inc. Pneumatic vitrectomy for retinal attachment
US5437241A (en) * 1994-06-08 1995-08-01 Pall Corporation Differential pressure indicator
JP3679143B2 (ja) * 1994-06-30 2005-08-03 株式会社ニデック 灌流吸引装置
US5571248A (en) 1995-03-10 1996-11-05 General Motors Corporation Pressure regulator
US5630827A (en) * 1995-06-19 1997-05-20 Dutch Ophthalmic Research Center International Bv Vitreous removing apparatus
JPH0942210A (ja) * 1995-08-02 1997-02-10 Ckd Corp シリンダの駆動制御装置
US5587536A (en) 1995-08-17 1996-12-24 Rasmussen; John Differential pressure sensing device for pneumatic cylinders
US5674194A (en) 1995-10-25 1997-10-07 Alcon Laboratories Inc. Process control system
US5989262A (en) * 1996-04-15 1999-11-23 Josephberg; Robert Gary Sutureless pars plana vitrectomy tool
US5993409A (en) * 1996-11-27 1999-11-30 Surgin Surgical Instrumentation, Inc. Needle for surgical use
US5808396A (en) * 1996-12-18 1998-09-15 Alcon Laboratories, Inc. System and method for tuning and controlling an ultrasonic handpiece
US5791142A (en) * 1997-03-27 1998-08-11 Husco International, Inc. Hydraulic control valve system with split pressure compensator
SE507552C2 (sv) 1997-04-23 1998-06-22 Rudolf Westerberg Ab Tvåhandsmanöversystem
JPH10339301A (ja) 1997-06-09 1998-12-22 Smc Corp 自動制御空気圧装置の制御方法および自動制御空気圧装置
US5846257A (en) 1997-08-15 1998-12-08 Nexus Medical System, Inc. Llc Pressure sensor for a surgical system
US6425883B1 (en) * 1998-05-08 2002-07-30 Circuit Tree Medical, Inc. Method and apparatus for controlling vacuum as a function of ultrasonic power in an ophthalmic phaco aspirator
DE19821420C1 (de) 1998-05-13 1999-10-21 Haldex Bremsen Gmbh & Co Kg Druckluftaufbereitungseinrichtung für Druckluftbeschaffungsanlagen auf Kraftfahrzeugen
US6575264B2 (en) * 1999-01-29 2003-06-10 Dana Corporation Precision electro-hydraulic actuator positioning system
AU4701499A (en) 1999-06-22 2001-01-09 Scieran Technologies, Inc. An apparatus and method for performing ophthalmic procedures
US6162187A (en) 1999-08-02 2000-12-19 Ethicon Endo-Surgery, Inc. Fluid collection apparatus for a surgical device
US6514268B2 (en) * 1999-08-30 2003-02-04 Alcon Universal Ltd. Method of operating microsurgical instruments
US6155233A (en) 1999-09-07 2000-12-05 Fasco Controls Corp. Combination pressure sensor and regulator for direct injection diesel engine fuel system
US6575990B1 (en) * 1999-10-21 2003-06-10 Medical Instrument Development Laboratories, Inc. High speed vitreous cutting system
NL1013376C2 (nl) 1999-10-22 2001-04-24 Dutch Ophthalmic Res Ct B V Chirurgisch snijgereedschap.
CA2724266C (fr) * 2000-02-29 2012-12-04 Gen-Probe Incorporated Procede et systeme permettant de verifier la surface d'un fluide et de la distribution d'un fluide
US6443947B1 (en) 2000-03-01 2002-09-03 Alexei Marko Device for thermal ablation of a cavity
US20010037689A1 (en) * 2000-03-08 2001-11-08 Krouth Terrance F. Hydraulic actuator piston measurement apparatus and method
US6450966B1 (en) 2000-05-03 2002-09-17 Datex-Ohmeda, Inc. Method for non-invasive blood pressure cuff identification using deflation pressure measurements
US6504474B1 (en) 2000-07-12 2003-01-07 Deere & Company Method and apparatus for detecting a restricted or bypassed transmission oil filter
US6485436B1 (en) * 2000-08-10 2002-11-26 Csaba Truckai Pressure-assisted biopsy needle apparatus and technique
US6561999B1 (en) 2000-09-29 2003-05-13 Alcon Universal Ltd. Surgical cassette and consumables for combined ophthalmic surgical procedure
JP4021141B2 (ja) * 2000-10-20 2007-12-12 株式会社ニデック 硝子体手術装置
US6758824B1 (en) * 2000-11-06 2004-07-06 Suros Surgical Systems, Inc. Biopsy apparatus
US6471853B1 (en) 2000-11-22 2002-10-29 Pti Technologies, Inc. Prognostic health monitoring of fluidic systems using MEMS technology
US6568416B2 (en) 2001-02-28 2003-05-27 Brian L. Andersen Fluid flow control system, fluid delivery and control system for a fluid delivery line, and method for controlling pressure oscillations within fluid of a fluid delivery line
US6779541B2 (en) 2001-10-12 2004-08-24 Smc Kabushiki Kaisha Fluid pressure regulator
US7470277B2 (en) 2001-10-16 2008-12-30 Alcon, Inc. Simultaneous proportional control of surgical parameters in a microsurgical system
DE10295527D2 (de) * 2001-11-19 2004-10-14 Luk Fahrzeug Hydraulik Hubermittlung in Hubkolbenmaschine
US6892745B2 (en) * 2002-04-10 2005-05-17 Honeywell International Inc. Flow control valve with integral sensor and controller and related method
US6678584B2 (en) * 2002-05-03 2004-01-13 Fisher Controls International Llc Method and apparatus for performing diagnostics in a control loop of a control valve
US6999853B2 (en) * 2002-05-03 2006-02-14 Fisher Controls International Llc. Methods and apparatus for operating and performing diagnostics in a control loop of a control valve
US20030226809A1 (en) 2002-06-06 2003-12-11 Detroit Diesel Corporation Method and apparatus for determining oil filter life
DE10247869B4 (de) 2002-10-14 2007-02-08 Imi Norgren Gmbh Druckmediumsbetätigter Arbeitszylinder
US8202277B2 (en) * 2003-01-29 2012-06-19 Edwin Ryan Small gauge surgical instrument with support device
US20040186484A1 (en) * 2003-01-29 2004-09-23 Edwin Ryan Small gauge surgical instrument with support device
US7219691B2 (en) * 2003-02-07 2007-05-22 Fisher Controls International Llc Control valve positioner mounting system
DE10341477A1 (de) 2003-09-05 2005-03-31 Riehle, Rainer, Dipl.-Ing. Schallgenerator zur Erzeugung in Rohrleitungen eines Wasser- oder Gasversorgungssystems ausbreitungsfähiger Schallimpulse
US20050245909A1 (en) * 2004-04-29 2005-11-03 Mccary Brian D Embedded data chip in a surgical handpiece
US7775052B2 (en) * 2004-05-07 2010-08-17 Delavan Inc Active combustion control system for gas turbine engines
US7337041B2 (en) * 2004-06-14 2008-02-26 Fisher Controls International Feedback control methods and apparatus for electro-pneumatic control systems
US7283321B1 (en) * 2004-10-08 2007-10-16 Maxtor Corporation Disk drives and methods allowing for dual stage actuator adaptive seek control and microactuator gain calibration
US7352287B2 (en) * 2005-01-07 2008-04-01 Veris Industries, Llc Pneumatic controller
US20060271082A1 (en) 2005-05-31 2006-11-30 Kirchhevel G Lamar Calibrated surgical probe
DE202005009670U1 (de) 2005-06-17 2005-09-01 Sieber, Dieter Schalldämpfer für Pneumatikantriebe
DE102005043367B4 (de) * 2005-09-12 2016-09-08 Laeis Gmbh Steuervorrichtung und Steuerverfahren für eine Kolben-Zylinder-Anordnung
US7326183B2 (en) * 2005-09-28 2008-02-05 Alcon, Inc. Intraocular pressure control
US7600405B2 (en) * 2005-10-11 2009-10-13 Alcon, Inc. Microsurgical probe
ES2560244T3 (es) * 2005-10-21 2016-02-18 Lonza Ag Sistema de control de caudal másico
WO2007062453A1 (fr) * 2005-11-30 2007-06-07 Ulco Technologies Pty Ltd Procédé et appareil de perfusion
US8187293B2 (en) * 2006-02-06 2012-05-29 Novartis Ag Microsurgical instrument
US7774287B2 (en) * 2006-03-14 2010-08-10 Asml Netherlands B.V. System and method for moving a component through a setpoint profile, lithographic apparatus and device manufacturing method
US20070270746A1 (en) * 2006-05-19 2007-11-22 Alcon, Inc. Surgical system having pneumatic manifolds with integral air cylinders
US20070282262A1 (en) 2006-05-19 2007-12-06 Alcon, Inc. Surgical system having integral pneumatic manifolds
US9180232B2 (en) 2006-05-19 2015-11-10 Novartis Ag Surgical system having manifolds with integral pneumatic accumulators
US20080125695A1 (en) 2006-06-23 2008-05-29 Hopkins Mark A Reflux control in microsurgical system
DE102006030034A1 (de) 2006-06-29 2008-01-03 Zf Friedrichshafen Ag Einrichtung zum Steuern eines fluidbetätigten doppeltwirkenden Stellzylinders
US7708734B2 (en) * 2006-06-30 2010-05-04 Alcon, Inc. Method for dynamically adjusting operation of a surgical handpiece
US7640119B2 (en) * 2006-06-30 2009-12-29 Alcon, Inc. System for dynamically adjusting operation of a surgical handpiece
RU58919U1 (ru) * 2006-09-01 2006-12-10 Ренат Сулейманович Акчурин Автономный комплекс для проведения операций на открытом работающем сердце
FR2905594B1 (fr) 2006-09-08 2008-12-05 Corneal Ind Soc Par Actions Si Vitreotome pneumatique
US20080082077A1 (en) 2006-09-29 2008-04-03 David Lloyd Williams System and method for flow rate control
US8679241B2 (en) 2006-10-30 2014-03-25 Novartis Ag Gas pressure monitor for pneumatic surgical machine
US8038692B2 (en) * 2006-10-31 2011-10-18 Novartis Ag Modular design for ophthalmic surgical probe
US8105405B2 (en) 2006-11-07 2012-01-31 Novartis Ag Quick release filter assembly for pneumatic surgical machine
US7628054B2 (en) * 2006-11-09 2009-12-08 Abbott Medical Optics Inc. Calibration utility for non-linear measurement system
US8162000B2 (en) 2006-12-13 2012-04-24 Novartis Ag Adjustable pneumatic system for a surgical machine
US9241830B2 (en) 2006-12-15 2016-01-26 Novartis Ag Pressure monitor for pneumatic vitrectomy machine
US8157145B2 (en) * 2007-05-31 2012-04-17 Ethicon Endo-Surgery, Inc. Pneumatically powered surgical cutting and fastening instrument with electrical feedback
US8080029B2 (en) 2007-09-21 2011-12-20 Novartis Ag System for actuation of a vitreous cutter
US8460324B2 (en) 2008-04-15 2013-06-11 Abbott Medical Optics Inc. High speed pneumatic vitrectomy control
US20090287233A1 (en) * 2008-05-15 2009-11-19 Huculak John C Small Gauge Mechanical Tissue Cutter/Aspirator Probe For Glaucoma Surgery
JP5231902B2 (ja) 2008-09-02 2013-07-10 株式会社ニデック 硝子体手術装置
US8328835B2 (en) * 2008-12-08 2012-12-11 Bausch & Lomb Incorporated System for operating and controlling a pneumatically driven vitrectomy probe
US9164516B2 (en) 2008-12-11 2015-10-20 Norgren Limited Method and apparatus for controlling a fluid operated actuator
DE102009006533B4 (de) * 2009-01-28 2011-06-30 Siemens Aktiengesellschaft, 80333 Stelleinrichtung mit einem Auf/Zu-Ventil
US20100305596A1 (en) * 2009-05-26 2010-12-02 Erik William Peterson Non-linear cut-rate multiplier for vitreous cutter
US20100312169A1 (en) * 2009-06-03 2010-12-09 Auld Jack R Method of operating a vitrectomy probe
DE102009032897B4 (de) * 2009-07-10 2013-09-19 Stabilus Gmbh Kolben-Zylinderaggregat
EP2473144B1 (fr) 2009-08-31 2015-10-14 Alcon Research, Ltd. Régulation de la sortie de pression pneumatique par étalonnage du cycle de service d'une vanne de commande
US8666556B2 (en) 2009-12-10 2014-03-04 Alcon Research, Ltd. Systems and methods for dynamic feedforward
US8728108B2 (en) 2009-12-10 2014-05-20 Alcon Research, Ltd. Systems and methods for dynamic pneumatic valve driver
DE102010028762A1 (de) 2010-05-07 2011-11-10 Zf Friedrichshafen Ag Vorrichtung zum Bestimmen eines Betriebszustandes von wenigstens einer bidirektional betätigbaren hydraulischen Stelleinrichtung eines Schaltelementes einer Getriebeeinrichtung
US8821524B2 (en) * 2010-05-27 2014-09-02 Alcon Research, Ltd. Feedback control of on/off pneumatic actuators
US8920078B2 (en) * 2010-06-03 2014-12-30 Jason Woolever Blower controller for pneumatic conveyance of granular materials
US9101442B2 (en) * 2010-12-15 2015-08-11 Alcon Research, Ltd. Reduced friction vitrectomy probe
US9101441B2 (en) * 2010-12-21 2015-08-11 Alcon Research, Ltd. Vitrectomy probe with adjustable cutter port size
US8888802B2 (en) * 2010-12-21 2014-11-18 Alcon Research, Ltd. Vitrectomy probe with adjustable cutter port size
US8808318B2 (en) * 2011-02-28 2014-08-19 Alcon Research, Ltd. Surgical probe with increased fluid flow

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080149197A1 (en) 2006-12-21 2008-06-26 Denis Turner Pneumatic system for a vitrector
WO2008079526A2 (fr) * 2006-12-22 2008-07-03 Alcon Research, Ltd. Procédé d'actionnement d'un instrument microchirurgical

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8818564B2 (en) 2009-08-31 2014-08-26 Alcon Research, Ltd. Pneumatic pressure output control by drive valve duty cycle calibration
US8728108B2 (en) 2009-12-10 2014-05-20 Alcon Research, Ltd. Systems and methods for dynamic pneumatic valve driver
US8821524B2 (en) 2010-05-27 2014-09-02 Alcon Research, Ltd. Feedback control of on/off pneumatic actuators
US8808318B2 (en) 2011-02-28 2014-08-19 Alcon Research, Ltd. Surgical probe with increased fluid flow
US9060841B2 (en) 2011-08-31 2015-06-23 Alcon Research, Ltd. Enhanced flow vitrectomy probe

Also Published As

Publication number Publication date
JP5711259B2 (ja) 2015-04-30
EP2509549B1 (fr) 2013-12-25
US20110144675A1 (en) 2011-06-16
BR112012013974B1 (pt) 2020-10-13
CN102652006A (zh) 2012-08-29
AU2010328590A1 (en) 2012-06-14
CN102652006B (zh) 2014-06-11
JP2013513426A (ja) 2013-04-22
EP2509549A1 (fr) 2012-10-17
AU2010328590B2 (en) 2015-09-17
BR112012013974A2 (pt) 2016-06-07
US8728108B2 (en) 2014-05-20
CA2781157C (fr) 2018-01-02
RU2012128873A (ru) 2014-01-20
CA2781157A1 (fr) 2011-06-16
RU2556529C2 (ru) 2015-07-10
ES2442368T3 (es) 2014-02-11

Similar Documents

Publication Publication Date Title
US8728108B2 (en) Systems and methods for dynamic pneumatic valve driver
US9937077B2 (en) Pneumatic pressure output control by drive valve duty cycle calibration
CA2672133C (fr) Systeme pneumatique reglable pour machine chirurgicale
CA2673145C (fr) Systeme pneumatique pour appareil de vitrectomie

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201080055636.6

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10779886

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2781157

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2010779886

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2010328590

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 2012543127

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2010328590

Country of ref document: AU

Date of ref document: 20101111

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2012128873

Country of ref document: RU

Ref document number: 1682/KOLNP/2012

Country of ref document: IN

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112012013974

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 112012013974

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20120611