EP1148827A1 - Procede et dispositif de traitement de tissus a l'aide de jets de fluide - Google Patents

Procede et dispositif de traitement de tissus a l'aide de jets de fluide

Info

Publication number
EP1148827A1
EP1148827A1 EP00904514A EP00904514A EP1148827A1 EP 1148827 A1 EP1148827 A1 EP 1148827A1 EP 00904514 A EP00904514 A EP 00904514A EP 00904514 A EP00904514 A EP 00904514A EP 1148827 A1 EP1148827 A1 EP 1148827A1
Authority
EP
European Patent Office
Prior art keywords
fluid
conduit
aperture
opening
nozzle
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP00904514A
Other languages
German (de)
English (en)
Inventor
Mohamed A. Hashish
Steven J. Craigen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flow International Corp
Original Assignee
Flow International Corp
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 Flow International Corp filed Critical Flow International Corp
Publication of EP1148827A1 publication Critical patent/EP1148827A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3203—Fluid jet cutting instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00743—Type of operation; Specification of treatment sites
    • A61B2017/00747—Dermatology
    • A61B2017/00761—Removing layer of skin tissue, e.g. wrinkles, scars or cancerous tissue

Definitions

  • This invention relates to methods and devices for treating tissues, such as skin, with high pressure fluid jets.
  • Plastic surgery refers generally to surgical repair or replacement of lost, injured, or deformed parts of the body by a transfer of tissue.
  • One aspect of plastic surgery involves removing layers of unwanted skin, for physiological or aesthetic purposes.
  • the present invention provides a method and apparatus for removing a portion of tissue with a high pressure fluid jet.
  • the apparatus can include a nozzle body having a nozzle orifice coupled to a source of a first fluid.
  • the apparatus can further include a conduit having a channel in fluid communication with the nozzle orifice.
  • the channel includes an exit opening for directing the first fluid, and at least one of the nozzle body and the conduit can include an aperture downstream of the nozzle orifice and upstream of an exit opening of the conduit.
  • the aperture can be in fluid communication with a source of a second fluid to introduce the second fluid into the conduit.
  • a ratio of a length of the conduit channel to a mean diameter of the exit opening of the conduit can be at least approximately 10 for mixing the second fluid with the first fluid to control the coherence of a fluid jet exiting the conduit.
  • the nozzle body can be configured to withstand forces generated by the first fluid when the first fluid has a static pressure of up to 5,000 psi.
  • the aperture is coupled to a pressurized source of the second fluid for delivering the second fluid to the conduit.
  • the aperture can be coupled to a vacuum source for drawing the second fluid into the conduit either through a separate aperture or through the exit opening of the conduit.
  • the second fluid can be drawn from a separate source of fluid, or from the ambient environment surrounding the apparatus.
  • the fluid jet exiting the conduit can be directed to any animal or vegetable tissue for removing a portion of the tissue.
  • the nozzle body through which the fluid jet passes can be supported by hand.
  • the second fluid can be controllably entrained with the first fluid to produce a fluid jet having a desired effect on the tissue.
  • the method can include controlling the pressures of the first and second fluids to reduce the coherence of the fluid jet and increase a number of discrete fluid droplets in the fluid jet.
  • the flow of the second fluid can be initiated prior to the flow of the first fluid to prevent the first fluid alone from striking the tissue.
  • Figure 1 is a partially schematic, partial cross-sectional side elevation view of an apparatus in accordance with an embodiment of the invention.
  • Figure 2 is a partially schematic, partial cross-sectional side elevation view of an apparatus having a plurality of axially spaced apart entrainment apertures in accordance with another embodiment of the invention.
  • Figure 3A is a partial cross-sectional side elevation view of an apparatus having a removable cartridge in accordance with still another embodiment of the invention.
  • Figure 3B is a detailed side elevation view of a portion of the apparatus shown in Figure 3A.
  • Figure 4 is a partial cross-sectional side elevation view of an apparatus having two removable cartridge assemblies in accordance with yet another embodiment of the invention.
  • Figure 5A is an exploded, partial cross-sectional side elevation view of an apparatus having a removable aperture housing in accordance with still another embodiment of the invention.
  • Figure 5B is a partial cross-sectional side elevation view of the assembled apparatus shown in Figure 5A. DETAILED DESCRIPTION OF THE INVENTION
  • the apparatus 10 includes a supply conduit 40 that delivers a primary fluid to a nozzle 30.
  • the primary fluid exits the nozzle 30 and can entrain a secondary fluid through secondary flow apertures 22.
  • the primary and secondary fluids can together pass into an axially elongated delivery conduit 50 and exit the delivery conduit 50 in the form of a fluid jet 90 that impacts tissue 80 below to remove a portion of the tissue.
  • the apparatus 10 can be manipulated by hand, or remotely via a gantry 95 or other remote positioning device, shown schematically in Figure 1.
  • the apparatus 10 can include a primary fluid supply 41 coupled to the supply conduit 40.
  • the primary fluid supply 41 can include a liquid-phase fluid, such as water, saline, or other fluids that are suitable for controlled removal of a portion of the tissue 80.
  • the primary fluid can include anti-allergens to reduce the likelihood of an allergic reaction in the tissue 80 and/or antibiotics to reduce the likelihood of an infection in the tissue 80.
  • the primary fluid supply 41 can also include pressurizing means, such as an intensifier or a pump, that can pressurize the primary fluid up to or beyond approximately 5,000 psi. In a preferred embodiment, the primary fluid supply 41 can pressurize the primary fluid to between 500 and 2,500 psi.
  • pressurizing means such as an intensifier or a pump
  • the particular pressure chosen can depend on the characteristics of the tissue 80 and on the intended effect of the fluid jet 90 on the tissue 80. For example, the pressure can be relatively high for making deep cuts in the tissue 80, or for cutting relatively hard tissue, such as bone tissue. Alternatively, the pressure can be relatively low for making shallow cuts in the tissue 80 and/or for cutting softer tissues, such as human skin.
  • the supply conduit 40 connects the primary fluid supply 41 with the nozzle 30.
  • the nozzle 30 can have a nozzle orifice 33 that extends through the nozzle 30 from an entrance opening 31 to an exit opening 32.
  • the nozzle orifice 33 can have a generally axisymmetric cross- sectional shape extending from the entrance opening 31 to the exit opening 32, and in other embodiments, one or more portions of the nozzle orifice 33 can have generally elliptical or other cross-sectional shapes for generating fluid jets having corresponding non-axisymmetric cross-sectional shapes.
  • an entrainment region 34 is located downstream of the nozzle 30.
  • the entrainment region 34 has a flow area that is larger than that of the nozzle orifice 33 to allow for entraining the secondary fluid through the secondary flow apertures 22.
  • four circular secondary flow apertures 22 (three of which are visible in Figure 1) are spaced apart at approximately the same axial location relative to the nozzle 30.
  • more or fewer secondary flow apertures 22 having the same or other cross-sectional shapes can be positioned anywhere along a flow passage extending downstream of the exit opening 32.
  • the secondary flow apertures 22 have diameters of between approximately 0.01 inches and 0.03 inches.
  • the secondary flow apertures 22 can have other shapes and sizes.
  • the secondary flow apertures 22 can be oriented generally perpendicular to the direction of flow through the entrainment region 34 (as shown in Figure 1), or at an acute or obtuse angle relative to the flow direction, as is discussed in greater detail below with reference to Figure 3 A.
  • the secondary flow apertures 22 communicate directly with the ambient environment outside the supply conduit 40. Accordingly, air (or any other gas adjacent the secondary flow apertures) can be drawn directly from the ambient environment into the entrainment region 34.
  • the secondary flow apertures 22 can be coupled to a controlled source of secondary fluid. In any case, the effect of the secondary fluid on the fluid jet 90 can be at least partially break up the fluid jet so that the fluid jet includes discrete droplets of primary fluid separated by regions of secondary fluid.
  • the delivery conduit 50 positioned downstream of the secondary flow apertures 22, can receive the primary and secondary fluids and direct the fluid jet 90. Accordingly, the delivery conduit 50 can include an upstream opening 54 positioned downstream of the secondary flow apertures 22, and a downstream opening 55 through which the fluid jet 90 exits. A channel 53 extends between the upstream opening 54 and the downstream opening 55.
  • the delivery conduit 50 can be formed integrally with the supply conduit 40 and in other embodiments, discussed in greater below with reference to Figures 3A-5B, the delivery conduit 50 can be removably coupled to the supply conduit 40.
  • the minimum flow area or mean diameter of the channel 53 is larger than the minimum flow area or mean diameter of the nozzle orifice 33, to allow the secondary fluid to be entrained by the primary fluid.
  • the mean diameter refers to the lineal dimension which, when squared, multiplied by pi and divided by four, is equal to the flow area.
  • the minimum mean diameter of the flow channel 53 can be between three and five times the minimum mean diameter of the nozzle orifice 33.
  • the nozzle orifice 33 can have a minimum diameter of approximately 0.004 inch and the flow channel 53 of the delivery conduit 50 can have a minimum diameter of approximately 0.080 inch.
  • the delivery conduit 50 can also have an overall length (between the upstream opening 54 and the downstream opening 55) of between 10 and 200 times the mean diameter of the downstream opening 55, to permit sufficient mixing of the secondary fluid with the primary fluid.
  • the delivery conduit 50 can have a length of approximately 4 inches when the downstream opening 55 has a diameter of 0.080 inch. In operation, the apparatus 10 is positioned proximate to the tissue
  • the apparatus 10 can be positioned either by hand or remotely via the gantry 95 or other mechanical positioning device.
  • the primary fluid is pressurized to between approximately 500 psi and approximately 2,500 psi (preferably about 1,500 psi when the tissue 80 is human skin).
  • the primary fluid is then pumped from the primary fluid supply 41 through the supply conduit 40 and into the entrainment region 34 where it entrains the secondary fluid through the secondary flow apertures 22.
  • the primary and secondary fluids proceed through the entrainment region 34 and the delivery conduit 50, exit the conduit 50 as a fluid jet 90, and strike the tissue 80.
  • the apparatus 10 can then be traversed relative to the tissue 80 (or vice versa) to remove a portion of the tissue 80 to a selected depth along a selected path.
  • the apparatus 10 can be traversed at a selected speed which, when taken together with the pressure and composition of the fluid jet 90 and the characteristics of the skin, causes one or more layers of skin to separate from the underlying layers.
  • the apparatus 10 can be stationary relative to the tissue 80 while the fluid jet 90 is pulsed or otherwise intermittently directed toward the tissue. Accordingly, the user can examine the tissue 80 between pulses of the fluid jet 90 to determine when a selected amount of the tissue has been removed. The user can then move the apparatus 10 to a different location relative to the tissue and repeat the process.
  • An advantage of the apparatus 10 discussed above with reference to Figure 1 is that it can effectively remove a portion of the tissue 80 without burning the surrounding tissue.
  • Another advantage is that users can control the pressure and/or mass flow rate of the primary fluid and the traverse rate of the apparatus 10 to control the amount of tissue removed, without simply cutting completely through the tissue, as can be the case with some conventional fluid jet devices.
  • users can control the pressure of the primary fluid to remove portions of a variety of tissue types. For example, users can remove external skin, tissue from internal soft organs, or outer layers of bone tissue to access bone marrow for transplants.
  • the device 10 can be sufficiently versatile to treat human tissue, animal tissue or any organic tissue.
  • the apparatus 10 can be used to remove the skin from fruits, such as peaches or tomatoes.
  • the fluid jet 90 can have approximately the same level of coherence over a range of stand-off distances 60, unlike some conventional fluid jets for which the coherence (and therefore the cutting effectiveness of the fluid jet) is a function of the stand-off distance 60. This is advantageous because users can more readily use the apparatus 10 to treat tissue 80 having a varying topography, without having to maintain as precise a control over the stand-off distance 60.
  • Figure 2 is a partially schematic, partial cross-sectional side elevation view of an apparatus 110 having two manifolds 152 (shown as an upstream manifold 152a and a downstream manifold 152b) adjacent a delivery conduit 150 in accordance with another embodiment of the invention.
  • the manifolds 152a and 152b can be coupled to corresponding secondary fluid supplies 151, shown in Figure 2 as an upstream secondary fluid supply 151a and a downstream secondary fluid supply 151b.
  • the upstream and downstream secondary fluid supplies 151 can supply different secondary fluids, and in an alternate embodiment the upstream and downstream secondary fluid supplies can supply the same secondary fluid.
  • the upstream and downstream secondary fluid supplies 151a and 151b can be combined to form a single secondary fluid supply.
  • the secondary fluid can include any suitable gas, for example, air, C0 2 or oxygen.
  • oxygen may hasten the healing of the tissue 80 surrounding the region at which the fluid jet 90 impacts the tissue.
  • the pressure of the secondary fluid can be in the range of approximately 5 psi to approximately 30 psi (preferably about 20 psi), or alternatively, can have any value that reduces the coherence of the fluid jet 90 to a level that allows for controlled removal of the tissue 80.
  • the upstream manifold 152a can include upstream flow apertures 122 a that introduce the secondary fluid to an upstream entrainment region 134a and the downstream manifold 152b can include downstream flow apertures 122b that introduce the secondary fluid to a downstream entrainment region 134b.
  • the upstream and downstream apertures 122a and 122b can have the same diameter.
  • the upstream apertures 122a can have diameters different than those of the downstream apertures 122b to entrain an amount of secondary fluid in the upstream entrainment region 134a that is different than the amount of secondary fluid entrained in the downstream entrainment region 134b.
  • the flow area of the delivery conduit 150 decreases slightly downstream of the upstream entrainment region 134a. In alternate embodiments, the flow area of the delivery conduit 150 can remain constant between the upstream and downstream entrainment regions 134a and 134b, or can increase between the two entrainment regions.
  • An advantage of the apparatus 110 shown in Figure 2 is that it may be easier to control the characteristics of the fluid jet 90 by supplying the secondary fluid at two (or more) axial locations downstream of the nozzle 30.
  • the upstream and downstream manifolds 152a and 152b may be coupled to different secondary fluid supplies 151a and 151b to produce a fluid jet 90 having a selected composition and a selected level of coherence.
  • the secondary fluid supplies 151a and 151b can supply similar fluids but at different pressures and/or mass flow rates to achieve the desired level of control over the coherence of the fluid jet 90.
  • the upstream secondary fluid supply 151a can be operated in reverse (i.e., as a vacuum source rather than as a pump) to draw a vacuum through the delivery conduit 150 and through the upstream apertures 121a.
  • the downstream secondary fluid supply 151b can supply the secondary fluid that is drawn up through the delivery conduit 150 to the upstream secondary fluid supply 151a.
  • the downstream secondary fluid supply 151b, downstream apertures 122b, and downstream manifold 152b can be eliminated and the secondary fluid can be drawn from the ambient environment through the downstream opening 155 of the delivery conduit 150 and upwardly through the delivery conduit 150.
  • the effect of drawing a vacuum through the delivery conduit 150 has been observed to be similar, over selected pressure ranges, to that of pumping secondary fluid into the delivery conduit 50, i.e., to reduce the coherence of the resulting fluid jet 90.
  • An advantage of drawing the secondary fluid directly from the ambient environment through the downstream opening 155 of the delivery conduit 150 is that the need for the downstream secondary fluid supply 151b, the downstream apertures 122b, and the downstream manifold 152b can be eliminated, resulting in a simpler device.
  • an advantage of drawing the secondary fluid from the downstream fluid supply 151b is that the characteristics of the secondary fluid can be more easily controlled by selecting the fluid provided by the downstream secondary fluid supply 151b.
  • the likelihood for entraining debris caused by the impact of the fluid jet 90 on the tissue 80 can be reduced by entraining fluid through the downstream apertures 122b rather than through the downstream conduit opening 155.
  • Figure 3A is a partial cross-sectional side elevation view of an apparatus 210 having a nozzle 230 and a delivery conduit portion 250 housed in a removable cartridge 277, in accordance with another embodiment of the invention.
  • the cartridge 277 is removably attached to a supply conduit 240, which is annularly disposed within a manifold 252.
  • the manifold 252 can include a manifold entrance 256 coupled to the secondary fluid supply 151a ( Figure 2) and the supply conduit 240 can be coupled to the primary fluid supply 41 ( Figure 2).
  • the supply conduit 240 can have a downstream end 244 with threads 242 that engage corresponding threads 278 of the cartridge 277.
  • the cartridge 277 can include wrench slots 262 for receiving a wrench to loosen or tighten the cartridge 277.
  • the apparatus 210 can include other means for removably attaching the cartridge 277.
  • the cartridge 277 can include at its upstream end a nozzle support portion 220 that supports the nozzle 230. As is shown in greater detail in Figure 3B, the nozzle support portion 220 has a nozzle opening 221 into which the nozzle 230 fits. A seal 224 seals the interface between the nozzle 230 and the nozzle support portion 220. Accordingly, the nozzle 230 can be removed from the support portion 220 and replaced, if desired.
  • the nozzle 230 can include a nozzle orifice 233 having an upstream entrance opening 231 and a downstream exit opening 232.
  • the entrance opening 231 can be selected to have a diameter of between 0.003 inch and 0.005 inch, and in other embodiments the entrance opening 231 (or the minimum diameter of the nozzle orifice 233) can have other sizes.
  • the nozzle 230 can include sapphire, diamond or another extremely hard material.
  • the nozzle 230 when the pressures produced by the primary fluid supply 41 ( Figure 1) are sufficiently low, the nozzle 230 can include a softer material, such as stainless steel.
  • the cartridge 277 can further include secondary flow apertures 222 positioned downstream of the nozzle support portion 220.
  • the secondary flow apertures 222 can be canted so as to form an acute angle with the direction of flow passing through the cartridge 277.
  • the secondary flow apertures 222 can be generally perpendicular to the direction of flow (as shown in Figures 1 and 2) or the secondary flow apertures can form an obtuse angle with the flow direction.
  • the apparatus 210 can include a conduit seal 261 that seals the interface between the manifold 252 and the delivery conduit portion 250 of the cartridge 277 downstream of the secondary flow apertures 222 to prevent the secondary fluid from leading therebetween.
  • An advantage of the apparatus shown in Figures 3A-B is that the annular arrangement of the manifold 252 and the supply conduit 240 results in a more compact unit that users can more easily manipulate and control during operation.
  • Another advantage is that the cartridge 277 can be easily removed from the apparatus 210. Accordingly, users can vary the size and orientation of the secondary flow apertures 222 and the delivery conduit portion 250 by exchanging one cartridge 277 for another cartridge having different dimensions. Furthermore, users can easily remove the cartridge 277 to access the nozzle 230. Accordingly, users can easily exchange the nozzle 230 with one having an orifice 233 with different dimensions, and/or users can easily replace the nozzle 230 when the nozzle becomes worn during normal use.
  • FIG 4 is a partial cross-sectional side elevation view of an apparatus 310 having two removable cartridge assemblies 377 (shown as an upstream cartridge 377a and a downstream cartridge 377b) in accordance with yet another embodiment of the invention.
  • the apparatus 310 includes a supply conduit 340 that can be coupled to the primary fluid supply 41 ( Figure 2) annularly disposed within a manifold 325 that can be coupled to the secondary fluid supply 151a ( Figure 2).
  • the upstream cartridge 377b can be positioned at the end of the supply conduit 340.
  • the upstream cartridge 377a can include an external threaded portion 378a that threadably engages a corresponding internal threaded portion of the supply conduit 340.
  • the upstream cartridge 377a houses a nozzle 330 that seals against an annular opening 321 of the upstream cartridge 377a with a seal 324, in a manner similar to that discussed above with reference to Figure 3B.
  • the downstream cartridge 377b includes a delivery conduit portion 350 that extends downstream of the manifold 352.
  • the downstream cartridge 377b can accordingly include an externally threaded portion 378b that threadably engages a corresponding internally threaded portion at the end of the manifold 352.
  • the downstream cartridge 377b can extend annularly around the end of the supply conduit 340 and can include a conduit seal 361 that seals against the outer surface of the supply conduit 340.
  • the downstream cartridge 377b can still further include a plurality of secondary flow apertures 322 positioned downstream of the supply conduit 340 for entraining secondary flow from the manifold 352, in a manner generally similar to that discussed above with reference to Figures 2-3B.
  • Figure 5A is an exploded, partial cross-sectional side elevation view of a modular apparatus 410 in accordance with another embodiment of the invention.
  • Figure 5B is a partial cross-sectional side elevation view of the assembled apparatus 410 shown in Figure 5 A.
  • the apparatus 410 includes a secondary fluid manifold 452 annularly disposed about a supply conduit 440. Both the manifold 452 and the supply conduit 440 are connected to a conduit housing 470, in which the primary and secondary fluids are combined to form the fluid jet 90 ( Figure 1).
  • the manifold 452 includes a supply line 454 that can be coupled to the secondary fluid supply 151a ( Figure 2).
  • the manifold 452 can also include internal threads 459a that threadably engage corresponding external threads 459b of the conduit housing 470.
  • a manifold passage 458a in the manifold 452 delivers the secondary fluid to the conduit housing 470, as will be discussed in greater detail below.
  • the manifold 452 can also include an aperture 466 through which a portion of the supply conduit 440 projects.
  • the supply conduit 440 includes a threaded fitting 443 that extends through the aperture 466 of the manifold 452 for coupling to the primary fluid supply 41 ( Figure 2).
  • the supply conduit 440 further includes an annular seal 457 that seals against the walls of the aperture 466. Downstream of the annular seal 457 are external threads 442a that threadably engage internal threads 442b of the conduit housing 470 to attach the supply conduit 440 to the conduit housing 470.
  • the conduit housing 470 can have a passageway 473 extending therethrough for receiving and mixing the primary and secondary fluids.
  • the passageway 473 can include an upstream portion 473 a that has the internal threads 442b for receiving the supply conduit 440.
  • the passageway 473 can further include a central portion 473b (downstream of the upstream portion 473 a) sized to removably receive a nozzle support 420 and an aperture housing 464.
  • the nozzle support 420 houses a nozzle 430 in a manner generally similar to that discussed above with reference to Figures 3A-B.
  • the nozzle support 420 further includes a channel 425 that directs the primary fluid through the nozzle support 420 from the nozzle 430 to the aperture housing 464.
  • the aperture housing 464 has a channel 425 a aligned with the channel 425 in the nozzle support 420.
  • the aperture housing 464 further includes four apertures 422 (three of which are visible in Figure 5 A) that direct the secondary fluid from the manifold 452 to the channel 425a. Accordingly, the apertures 422 are aligned with passages 458b (in the conduit housing 470) that are in turn aligned with the manifold passage 458a (in the manifold 452).
  • the aperture housing 464 and the nozzle support 420 are biased into position in the central portion 473b of the passageway 473 when the supply conduit 440 is threaded into the conduit housing 470.
  • the passageway 473 in the conduit housing 470 further includes a downstream portion 473 c (downstream of the central portion 473b), sized to receive a delivery conduit 450. Accordingly, the delivery conduit 450 can be inserted into the downstream portion 473 c of the passageway 473 until an upstream end 454 of the delivery conduit 450 abuts a conduit seat 471 of the conduit housing 470.
  • the conduit seal 461 and delivery conduit 450 are held in place by a retainer 463 that is disposed about the delivery conduit and is threadably attached to the conduit housing 470.
  • Operation of the device 410 is generally similar to that discussed above with reference to Figures 1-4, and is best understood with reference to Figure 5B.
  • Secondary flow is introduced into the manifold 452 and primary flow is introduced into the supply conduit 440.
  • the secondary flow passes through the apertures 422 where it mixes with the primary flow to form a fluid jet 90 which exits the delivery conduit 450 to treat a portion of tissue 80.
  • the flow of the secondary fluid is initiated before initiating the flow of primary fluid.
  • the apparatus 410 can include a mechanical electrical and/or other type of interlock device that prevents the flow of primary fluid through the supply conduit 440 unless the secondary fluid is flowing into and through the manifold 452.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'enlèvement de tissus à l'aide d'un jet de fluide haute pression. Dans un mode de réalisation, on mélange un premier fluide haute pression avec un second fluide, afin de produire un jet de fluide possédant un degré réduit de cohérence. On peut introduire le second fluide, soit par entraînement à partir de l'atmosphère ou d'un réservoir, ou à partir d'une source de pression, soit au moyen d'une pompe à vide. Il est possible de commander le débit massique et/ou la pression, soit du premier, soit du second fluide, soit des deux, afin d'enlever une portion de tissu. Ce tissu peut être un tissu humain ou animal, tel qu'un tissu de peau ou d'os, un tissu végétal ou d'autres types de tissus.
EP00904514A 1999-01-27 2000-01-24 Procede et dispositif de traitement de tissus a l'aide de jets de fluide Withdrawn EP1148827A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US23869199A 1999-01-27 1999-01-27
US238691 1999-01-27
PCT/US2000/001665 WO2000044292A1 (fr) 1999-01-27 2000-01-24 Procede et dispositif de traitement de tissus a l'aide de jets de fluide

Publications (1)

Publication Number Publication Date
EP1148827A1 true EP1148827A1 (fr) 2001-10-31

Family

ID=22898921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00904514A Withdrawn EP1148827A1 (fr) 1999-01-27 2000-01-24 Procede et dispositif de traitement de tissus a l'aide de jets de fluide

Country Status (4)

Country Link
EP (1) EP1148827A1 (fr)
JP (1) JP2002535067A (fr)
AU (1) AU2625700A (fr)
WO (1) WO2000044292A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7934977B2 (en) 2007-03-09 2011-05-03 Flow International Corporation Fluid system and method for thin kerf cutting and in-situ recycling
US8448880B2 (en) 2007-09-18 2013-05-28 Flow International Corporation Apparatus and process for formation of laterally directed fluid jets
US20090182261A1 (en) * 2008-01-11 2009-07-16 Seiko Epson Corporation Fluid Ejecting Apparatus, Surgical Operation Instrument
CN109965976B (zh) * 2013-09-06 2022-05-31 普罗赛普特生物机器人公司 利用致脱脉冲的用于消融组织的装置
JPWO2018193701A1 (ja) * 2017-04-17 2020-02-27 学校法人東京電機大学 液体噴射装置

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DE3812841A1 (de) * 1988-04-18 1989-11-02 Schubert Werner Leistungskatheter
DE3916446A1 (de) * 1988-06-14 1990-03-15 Autobahnbaukombinat Veb Verfahren und vorrichtung zur bearbeitung von festen stoffen mittels druckwasserstrahl
US5144766A (en) * 1989-11-03 1992-09-08 Flow International Corporation Liquid abrasive cutting jet cartridge and method
JPH0734805B2 (ja) * 1990-05-16 1995-04-19 アロカ株式会社 血液凝固装置
DE4120613A1 (de) * 1991-06-20 1992-03-05 Suesse Harald Selbstregulierender hochdrucktrennstrahlbeschleuniger
CA2127637C (fr) * 1993-07-26 2006-01-03 Scott Bair Instrument chirurgical de coupure a jet de liquide

Non-Patent Citations (1)

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Title
See references of WO0044292A1 *

Also Published As

Publication number Publication date
WO2000044292A1 (fr) 2000-08-03
AU2625700A (en) 2000-08-18
JP2002535067A (ja) 2002-10-22

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