NL2019483B1 - Aspiration and/or irrigation needle with filter - Google Patents

Aspiration and/or irrigation needle with filter Download PDF

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Publication number
NL2019483B1
NL2019483B1 NL2019483A NL2019483A NL2019483B1 NL 2019483 B1 NL2019483 B1 NL 2019483B1 NL 2019483 A NL2019483 A NL 2019483A NL 2019483 A NL2019483 A NL 2019483A NL 2019483 B1 NL2019483 B1 NL 2019483B1
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NL
Netherlands
Prior art keywords
needle
end wall
tubular shaft
distal end
grid
Prior art date
Application number
NL2019483A
Other languages
Dutch (nl)
Inventor
Coliene Dam-Huisman Adriaantje
Eckhardt Claus
Original Assignee
Crea Ip B V
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Filing date
Publication date
Application filed by Crea Ip B V filed Critical Crea Ip B V
Priority to NL2019483A priority Critical patent/NL2019483B1/en
Application granted granted Critical
Publication of NL2019483B1 publication Critical patent/NL2019483B1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M3/00—Medical syringes, e.g. enemata; Irrigators
    • A61M3/02—Enemata; Irrigators
    • A61M3/0279—Cannula; Nozzles; Tips; their connection means
    • 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
    • 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
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A61M1/79—Filters for solid matter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • A61M1/85—Drainage tubes; Aspiration tips with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0009—Making of catheters or other medical or surgical tubes
    • A61M25/001—Forming the tip of a catheter, e.g. bevelling process, join or taper
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/06—Head
    • A61M2210/0612—Eyes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/3145—Filters incorporated in syringes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3286—Needle tip design, e.g. for improved penetration

Abstract

A needle (142) comprising an integrated filter for surgical aspiration and/or irrigation comprises a generally tubular shaft (144) extending from a distal end (146) to a proximal end (148). The tubular shaft (144) is open at its proximal end (148) for connection to an aspiration system and closed at its extreme distal end (146) by an end wall (150), the end wall (150) having a perforated region (152) which forms a grating (154) for preventing surgical debris and/or retinal tissue entering the needle (142). Methods for forming a needle with an integrated filter are also descnbed.

Description

Field of the invention
The present invention relates to a needle comprising in-built filtering means. More particularly, embodiments of the present invention relate to needles for ophthalmic aspiration and/or irrigation, which provide a filter to minimise debris and/or tissue entering the needle.
Background art
A needle assembly incorporating a filter is known from US2008/0097353, which describes a single in-line filter hollow needle. The needle has an outer wall, a proximal end, a distal end with a pointed tip and a central opening between the ends for communicating fluids there through. A filter is located within the central opening, partway along the passage defined by the needle, proximate to the tip.
An ophthalmic aspiration system incorporating a filter for removing aspirated particles is known from US2006/0173404. The ophthalmic aspiration system comprises a hand-piece which is connected to a vacuum source by a tube. A filter assembly is connected to the tube to filter out particles that are aspirated into the system.
Summary of the invention
The present invention seeks to provide a filter needle that prevents delicate ocular tissue (e.g. retinal tissue) being drawn into the needle and reduces the amount of surgical debris entering an aspiration system, thereby preventing blockages within the needle.
In a first aspect of the present invention, there is provided a needle for surgical aspiration and/or irrigation comprising: a (generally) tubular shaft extending from a distal end to a proximal end; wherein the tubular shaft is open at its proximal end for connection to an aspiration system; and wherein the tubular shaft is closed at its extreme distal end by an end wall, the end wall having a perforated region which forms a grating for preventing delicate ocular tissue and/or surgical debris entering the needle.
In a second aspect of the invention, there is provided a method for manufacturing a needle according to the present invention, comprising the steps of: providing a needle having a (generally) tubular shaft extending from an open distal end to an open proximal end; forming at least one perforation in an end wall material to provide a grating therein; securing the end wall to the distal end of the tubular shaft such that the grating is provided at the extreme distal end of the tubular shaft for filtering material from the surgical site.
In a third aspect of the present invention, there is provided a method for manufacturing a needle for an ophthalmic surgical procedure, the method comprising the steps of: forming a needle having a (generally) tubular shaft extending from an open proximal end to a closed distal end, said closed distal end being closed by an end wall at the extreme distal end of the tubular shaft; forming
P6069367NL
2017.09.25 at least one perforation in the end wall to provide a grating at the extreme distal end of the tubular shaft for filtering material from a surgical site.
By forming a grating in an end wall of a surgical needle, the grating prevents fragile tissue (e.g. retinal tissue) being drawn into the shaft of the needle. Moreover, the risk of the needle becoming blocked by surgical debris is minimized since particles impacting the grating are free to move laterally away from the needle tip, rather than being confined at the filter within the bore of a needle.
Embodiments of the invention are described in the claims as attached.
Short description of drawings
The present invention will be discussed in more detail below, with reference to the attached drawings, in which:
Fig. 1 shows an aspiration system for use in an ophthalmic aspiration and/or irrigation procedure.
Fig. 2 shows the distal tip of a needle in accordance with embodiments of the present invention.
Fig. 3 shows the tip of a needle in accordance with an embodiment of the present invention.
Fig. 4 shows a cross-sectional view of the needle shown in Fig. 3.
Fig. 5 shows the tip of a needle in accordance with a further embodiment of the present invention.
Fig. 6 shows a cross-sectional view of the needle shown in Fig. 5.
Fig. 7 shows another embodiment of a filter needle according to the present invention, the needle having a domed grating.
Fig. 8 shows a cross-sectional view of the needle shown in Fig. 7.
Description of embodiments
Exemplary embodiments of the present invention will now be described in detail. The skilled person will understand that devices and methods herein are non-limiting exemplary embodiments and that the scope of protection is defined by the claims. For example, although the present invention is described in detail with respect to ophthalmic aspiration procedures, the skilled person will understand that the present invention may be applicable to fine needle aspiration procedures in general or other surgical irrigation procedures. In many surgical irrigation applications, backwash of material from the surgical site may occur through the irrigation tip. Therefore, a filtered irrigation needle in accordance with the present invention may be particularly advantageous. The skilled person will also understand that the features illustrated or described in connection with one exemplary embodiment may be combined with features described in other embodiments. Such modifications and variations are included within the scope of the present disclosure.
An aspiration system for carrying out an ophthalmic procedure will now be described with reference to Fig. 1. As shown in Fig. 1, an aspiration system 100 comprises a vacuum source 110 and an aspiration tip 140. A tube 130 connects the aspiration tip 140 to the vacuum source 110.
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The aspiration tip 140 comprises a filter needle 142. A control unit 120 can further be provided, which is configured to control the flow of fluid through the system 100. The skilled person will understand, that for an irrigation procedure, the needle 140 can be connected via tube 130 to an infusion fluid source (not shown).
A filter needle for surgical aspiration and/or irrigation will now be described in more detail with reference to Fig. 2. As shown in Fig. 2, the filter needle 142 comprises a generally tubular shaft 144 which extends from a distal end 146 to a proximal end 148. The tubular shaft 144 is open at its proximal end 148and configured for connection to the tubing 130. The proximal end 148 may be provided with connection means 149 that will be known to the skilled person. For example, the proximal end of the needle 142 may be provided with Luer lock connector for mating with a corresponding connector on the tubing 130. The skilled person will appreciate that the (generally) tubular shaft is not limited to a circular cross-section, although this is most commonly used in the art. Instead, the present invention may also include (generally) tubular shafts having elliptical, square or other cross sections.
The extreme distal end of the needle 142 is closed by an end wall 150. The end wall 150 comprises a perforated region, which includes perforations 152 formed across at least a portion of the end wall 150, to form a grating 154 across the extreme distal end of the needle, which acts as filter for surgical debris 170 or tissue and other particles that would otherwise enter the needle 140. Perforations 152 are herein seen as apertures extending all the way through material of the end wall 150. By forming the grating 154 at the extreme distal end of the tubular shaft 144, debris from the ophthalmic surgical procedure does not enter the needle 142. Moreover, the grating prevents fragile retinal tissue being drawn into the needle, which could cause irreversible damage. This means that blockages at the grating 154 are significantly reduced, since the aspirated material does not build up on the filter within the confines of the tubular shaft, in contrast to known filtered needles. Instead, material that cannot pass through grating 154 can slide off the end wall 150 of the needle 142. This reduces blockages within the needle 142.
As shown in Fig. 3, the perforations 152 can take the form of a plurality of holes (e.g. an array of holes) that extend across the end wall 150. In the embodiment shown in Fig. 3, the grating 154 is formed of an array of circular holes extending across the majority of the end wall 150. However, the skilled person will understand that the holes can have other shapes. For example, hexagonal or square holes may be providing in end wall 150 to form grating 154. The skilled person will also understand that holes need not have uniform shape and size in all embodiments.
Referring now to Fig. 4, in some embodiments of the present invention, the grating 154 may also be formed as a series of slots extending across end wall 150. The slots may be arranged in parallel rows. As shown in Fig. 4, the slots may extend across the end wall 150 of the needle 140 and partway along a sidewall(s) 190 of the tubular shaft 144. This configuration is advantageous because, even if the grating 154 across the front face of the end wall 150 is occluded by surgical debris or tissue, the slots extending down the sidewall(s) 190 of the tubular shaft 140 will prevent a vacuum being formed in the needle, which can damage tissue at the surgical site or lead to sudden and dangerous flow variations across the needle 142. The skilled person will appreciate that a
P6069367NL
2017.09.25 similar advantage may be achieved in the embodiment shown in Figs. 3 and 4 by providing additional holes (not shown) in the sidewalls 190 towards the distal end 146 of the needle.
The end wall 150 can have varying thickness. In some embodiments, the thickness of the end wall 150 may extend so as to provide an extended filtration passage. To minimise the impact of the grating 154 on the flow rate through the needle, in embodiments of the present invention, the end wall has a thickness T, which is less than an inner diameter D of the distal end of the tubular shaft 144.
In exemplary embodiments of the present invention, the needle 142 has an inner diameter D of between 0.31mm and 0.91mm (i.e. between 30 gauge and 20 gauge). The holes have a diameter of between 0.02mm and 0.08mm, for example 0.06mm. In embodiments comprising slots, slots have a width of between 0.02mm and 0.08mm, e.g. 0.05mm.
To ensure maximising the flow rate through the needle, in exemplary embodiments, the open area of the perforations 152 comprises at least 50% of a surface area of the end wall 150 (see Fig. 3-6) . However, the skilled person will appreciate the greater the open surface area at the end wall 150 of the needle 142, the higher the flow rate through the needle at a given pressure. Therefore, in further exemplary embodiments of the present invention, the open area of the perforations comprises at least 70% of the surface area of the end wall 150. In yet another embodiment, this may be increased to at least 90% of the surface area of the end wall 150.
It will be appreciated in embodiments in which the perforations extend partway along the sidewalls 190 of the tubular shaft 144, the open area of the perforations may exceed 100% of the surface area of the end wall 150, whilst still providing a grating 154 across the distal end of the needle 142. However, to prevent a drop in irrigation and/or aspiration pressure at the tip, it is beneficial to limit the open area of the perforations to 110% of the surface area of the end wall 150, ideally 100% of the surface area of the end wall 150.
Although the embodiments described with reference to Figs. 3-6 comprise a grating 154 formed of a plurality of perforations 152 (in the form of holes of slots), the skilled person will appreciate that grating 154 may be formed with a single aperture. For example, a tortuous aperture may be provided that extends across end wall 150 to provide grating 154.
The end wall 150 of the needle 142 shown in Figs. 2 to 6 are planar, and extend in a plane P perpendicular to a longitudinal axis of the needle. However, the skilled person will appreciate that other configurations are possible, which may provide additional benefits, depending on the application. For example, end wall 150 may be formed at an oblique angle with respect to the longitudinal axis of the needle 142. Alternatively, the end wall 150 may be domed, as shown in Fig. 7 and 8. The domed end wall 150 may be convex. This may help to minimise further the build-up of surgical debris at the tip of the needle 142. A multi-faceted convex end wall 150 may also be provided.
Needles 142 in accordance with the present invention may be made of many materials. However, in exemplary embodiments, needle 142 comprises a metal suitable for use in surgical applications, e.g. surgical steel. However, the skilled person will appreciate that needle 142 may be formed of a suitable polymer, such as polyimide or PEEK.
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Needles according to the present invention may be formed in a number of ways. In one exemplary method for forming a needle according to the present invention, the needle 142 may be produced by forming an end wall 150 from a sheet or plate of material (e.g. surgical steel) that will form the end wall 150 of the needle. The plate can then be attached to the hollow tubular shaft 144. Attachment of the front fact 150 to the shaft 144 of the needle 142 may be accomplished by welding or other suitable attachment means. The skilled person will appreciate that the holes 152 forming the grating 154 may be formed in the plate before or after attachment of the end wall 150 to the shaft 144. The end wall 150 can be made of the same material as the tubular shaft 144 (e.g. stainless steel) or may be made from a different material. The holes 152 that form the grating 154 may be formed in the end wall 150 by micro-drilling, laser drilling, electro-chemical machining, etching, etc.
In an alternative exemplary method for producing a needle in accordance with the present invention, the needle is formed with a blind bore, i.e. the needle is formed with a (generally) tubular shaft extending from an open proximal end to a closed distal end, said closed distal end being closed by an end wall at the extreme distal end of the tubular shaft. At least one perforation 152 can then be formed in the end wall 150 to form a grating 154 at the extreme distal end of the needle 142.
In embodiments with perforations 152 that extend at least partway along the sidewall 190 of the needle 142 (see Figs. 5 and 6), the skilled person will appreciate that the perforations 152 along the side walls 190 may be formed at the same time and by the same methods as the perforations 152 formed in the end wall 150, e.g. using milling or similar cutting techniques. Alternatively, the at least one perforation 152 in the side wall can be formed before the end wall 150 is secured to the tubular shaft 144.
The exemplary embodiments described above with reference to the drawing Figs. 1-8 can be summarized in the following interdependent numbered embodiments:
Embodiment 1. A needle (142) for surgical aspiration and/or irrigation comprising:
a tubular shaft (144) extending from a distal end to a proximal end;
wherein the tubular shaft (144) is open at its proximal end (148) for connection to an aspiration and/ or irrigation system; and wherein the tubular shaft (144) is closed at its extreme distal end (146) by an end wall (150), the end wall (150) having a perforated region which forms a grating (154).
Embodiment 2. The needle according to embodiment 1, wherein the grating (154) comprises an array of holes (152) in the end wall (150).
Embodiment 3. The needle according to embodiment 2, wherein the holes (152) are round, rectangular or hexagonal.
Embodiment 4. The needle according to embodiment 1, wherein the grating (154) is formed as a single tortuous aperture in the end wall (150).
Embodiment 5. The needle according to embodiment 1, wherein the grating (154) is formed of a plurality of slots (152).
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Embodiment 6. The needle according to embodiment 4, wherein the grating (154) extends across the end wall (150) and at least partway down sidewalls (190) of the tubular shaft (144).
Embodiment 7. The needle according to any one of embodiments 1 to 6, wherein the tubular shaft (144) and the end wall (150) are formed integrally as a single piece.
Embodiment 8. The needle according to any one of embodiments 1 to 7, wherein the end wall (150) is substantially planar.
Embodiment 9. The needle according to any one of embodiments 1 to 7, wherein the end wall (150) is dome shaped.
Embodiment 10. The needle according to any one of embodiments 1 to 8, wherein the end wall (150) extends in a plane P perpendicular to a longitudinal axis of the needle (142).
Embodiment 11. The needle according to any one of embodiments 1 to 9, wherein an open area of the holes (152) forms at least 50% of a total surface area of the end wall (150), e.g. at least 70% of the total surface area of the end wall (150).
Embodiment 12. The needle according to any one of embodiments 1 to 11, wherein the needle (142) has an inner diameter (D) between 0.31 mm and 0.91 mm.
Embodiment 13. The needle according to any one of embodiments 1 to 12, wherein the needle (142) is an ophthalmic aspiration needle.
Embodiment 14. A method for manufacturing a needle for an ophthalmic surgical procedure, the method comprising:
providing a needle (142) having a tubular shaft (144) extending from an open distal end (146) to an open proximal end (148);
forming at least one perforation (152) in an end wall (150) material to provide a grating (154) therein;
securing the end wall (150) to the distal end of the tubular shaft (144) such that the grating (154) is provided at the extreme distal end of the tubular shaft (144) for filtering material from a surgical site.
Embodiment 15. A method for manufacturing a needle for an ophthalmic surgical procedure, the method comprising the steps of:
forming a needle (142) having a tubular shaft (144) extending from an open proximal end (148) to a closed distal end (146), the closed distal end being closed by an end wall (150) at the extreme distal end of the tubular shaft (144);
forming at least one perforation (152) in the end wall (150) to provide a grating (154) at the extreme distal end of the tubular shaft (144) for filtering material from a surgical site.
The present invention has been described above with reference to a number of exemplary embodiments as shown in the drawings. However, the skilled person will understand that modifications and alternative implementations of some parts or elements are possible, and are included in the scope of protection as defined in the appended claims.
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Claims (15)

ConclusiesConclusions 1. Een naald (142) voor chirurgische aspiratie en/of irrigatie omvattende:A needle (142) for surgical aspiration and / or irrigation comprising: een in het algemeen buisvormige schacht (144) die zich uitstrekt vanaf een distaai uiteinde naar een proximaal uiteinde;a generally tubular shaft (144) extending from a distal end to a proximal end; waarbij de in het algemeen buisvormige schacht (144) bij zijn proximaal uiteinde (148) open is voor verbinding met een aspiratie- en/of irrigatiesysteem; en waarbij de buisvormige schacht (144) bij zijn uiterste distaai uiteinde (146) afgesloten is dooreen eindwand (150), waarbij de eindwand (150) een geperforeerd gebied (152) heeft dat een rooster (154) vormt.wherein the generally tubular shaft (144) is open at its proximal end (148) for connection to an aspiration and / or irrigation system; and wherein the tubular shaft (144) is closed at its extreme distal end (146) by an end wall (150), the end wall (150) having a perforated area (152) forming a grid (154). 2. De naald volgens conclusie 1, waarbij het rooster (154) een array gaten (152) in de eindwand (150) omvat.The needle of claim 1, wherein the grid (154) comprises an array of holes (152) in the end wall (150). 3. De naald volgens conclusie 1 of 2, waarbij de gaten (152) rond, rechthoekig of hexagonaal zijn.The needle of claim 1 or 2, wherein the holes (152) are round, rectangular, or hexagonal. 4. De naald volgens conclusie 1, waarbij het rooster (154) gevormd is als een enkele doorlopende apertuur in de eindwand.The needle of claim 1, wherein the grid (154) is formed as a single continuous aperture in the end wall. 5. De naald volgens conclusie 1, waarbij het rooster (154) gevormd is door een veelvoud sleuven (152).The needle of claim 1, wherein the grid (154) is formed by a plurality of slots (152). 6. De naald volgens conclusie 4, waarbij het rooster (154) zich uitstrekt over de eindwand (150) en ten minste gedeeltelijk naar beneden langs zijwanden (190) van de buisvormige schacht.The needle of claim 4, wherein the grid (154) extends over the end wall (150) and at least partially downwards along side walls (190) of the tubular shaft. 7. De naald volgens één van de conclusies 1-6, waarbij de buisvormige schacht (144) en de eindwand (150) integraal als een enkel stuk gevormd zijn.The needle of any one of claims 1-6, wherein the tubular shaft (144) and the end wall (150) are integrally formed as a single piece. 8. De naald volgens één van de conclusies 1-7, waarbij de eindwand (150) in hoofdzaak vlak is.The needle of any one of claims 1-7, wherein the end wall (150) is substantially flat. 9. De naald volgens één van de conclusies 1-7, waarbij de eindwand (150) als een koepel gevormd is.The needle of any one of claims 1-7, wherein the end wall (150) is shaped as a dome. 10. De naald volgens één van de conclusies 1-8, waarbij de eindwand (150) zich uitstrekt in een vlak P loodrecht op een longitudinale as van de naald (142).The needle of any one of claims 1-8, wherein the end wall (150) extends in a plane P perpendicular to a longitudinal axis of the needle (142). P6069367NLP6069367NL 2017.09.252017.09.25 11. De naald volgens één van de conclusies 1 -9, waarbij een open gebied van de gaten (152) ten minste 50% vormt van een totaal oppervlaktegebied van de eindwand (150), bijvoorbeeld ten minste 70% van het totaal oppervlaktegebied van de eindwand.The needle of any one of claims 1 to 9, wherein an open area of the holes (152) forms at least 50% of a total surface area of the end wall (150), for example at least 70% of the total surface area of the end wall. 12. De naald volgens één van de conclusies 1-11, waarbij de naald (142) een binnendiameter heeft tussen 0.31mm en 0.91mm.The needle of any one of claims 1 to 11, wherein the needle (142) has an inner diameter between 0.31 mm and 0.91 mm. 13. De naald volgens één van de conclusies 1-12, waarbij de naald (142) is een oftalmische aspiratienaald is.The needle of any one of claims 1-12, wherein the needle (142) is an ophthalmic aspiration needle. 14. Een werkwijze voor vervaardigen van een naald voor een oftalmische chirurgische procedure, waarbij de werkwijze omvat:A method of manufacturing a needle for an ophthalmic surgical procedure, the method comprising: verschaffen van een naald (142) met een in het algemeen buisvormige schacht (144) die zich uitstrekt vanaf een open distaai uiteinde (146) naar een open proximaal uiteinde (148);providing a needle (142) with a generally tubular shaft (144) extending from an open distal end (146) to an open proximal end (148); vormen van ten minste één perforatie (152) in materiaal van een eindwand (150) om een rooster (154) daarin te verschaffen;forming at least one perforation (152) in material of an end wall (150) to provide a grid (154) therein; vastmaken van de eindwand (150) aan het distaai uiteinde van de in het algemeen buisvormige schacht (144) zodat het rooster (154) wordt voorzien aan een uiterste distaai uiteinde van de in het algemeen buisvormige schacht (144) voor filteren van materiaal vanaf een chirurgische locatie.securing the end wall (150) to the distal end of the generally tubular shaft (144) so that the grid (154) is provided at an extreme distal end of the generally tubular shaft (144) for filtering material from a surgical location. 15. Een werkwijze voor vervaardigen van een naald voor een oftalmische chirurgische procedure, waarbij de werkwijze omvat:A method of manufacturing a needle for an ophthalmic surgical procedure, the method comprising: vormen van een naald (142) met een in het algemeen buisvormige schacht (144) die zich uitstrekt vanaf een open proximaal uiteinde (148) naar een afgesloten distaai uiteinde (146), waarbij het afgesloten distaai uiteinde afgesloten is dooreen eindwand (150) op het uiterste distaai uiteinde van de in het algemeen buisvormige schacht (144);forming a needle (142) with a generally tubular shaft (144) extending from an open proximal end (148) to a sealed distal end (146), the sealed distal end being closed by an end wall (150) on the extreme distal end of the generally tubular shaft (144); vormen van ten minste één perforatie (152) in de eindwand (150) om een rooster (154) te verschaffen bij het uiterste distaai uiteinde van de in het algemeen buisvormige schacht (144) voor filteren van materiaal vanaf een chirurgische locatie.forming at least one perforation (152) in the end wall (150) to provide a grid (154) at the extreme distal end of the generally tubular shaft (144) for filtering material from a surgical site. 100100 150 .152150,152 150150 150150 P6069367NLP6069367NL 2017.09.252017.09.25
NL2019483A 2017-09-05 2017-09-05 Aspiration and/or irrigation needle with filter NL2019483B1 (en)

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Citations (7)

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US6159175A (en) * 1995-06-02 2000-12-12 Surgical Design Corporation Phacoemulsification handpiece, sleeve, and tip
US20060199147A1 (en) * 2003-10-27 2006-09-07 Mahlmann Lee A Aspirator having a cushioned and aspiration controlling tip
US20060206050A1 (en) * 2005-03-08 2006-09-14 Alcon, Inc. Phacoemulsification tip
GB2433033A (en) * 2005-12-09 2007-06-13 Michael John Radley Young Orthopaedic suction filter
US20130304003A1 (en) * 2012-05-11 2013-11-14 Stiehl Technologies, Llc Surgical suction wand
US20140074013A1 (en) * 2012-09-07 2014-03-13 Bausch & Lomb Incorporated Vibrating Surgical Device for Removal of Vitreous and Other Tissue

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6159175A (en) * 1995-06-02 2000-12-12 Surgical Design Corporation Phacoemulsification handpiece, sleeve, and tip
US6126629A (en) * 1997-12-18 2000-10-03 Bausch & Lomb Surgical, Inc. Multiple port phaco needle
US20060199147A1 (en) * 2003-10-27 2006-09-07 Mahlmann Lee A Aspirator having a cushioned and aspiration controlling tip
US20060206050A1 (en) * 2005-03-08 2006-09-14 Alcon, Inc. Phacoemulsification tip
GB2433033A (en) * 2005-12-09 2007-06-13 Michael John Radley Young Orthopaedic suction filter
US20130304003A1 (en) * 2012-05-11 2013-11-14 Stiehl Technologies, Llc Surgical suction wand
US20140074013A1 (en) * 2012-09-07 2014-03-13 Bausch & Lomb Incorporated Vibrating Surgical Device for Removal of Vitreous and Other Tissue

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