# US 10,307,094 B2 · Microperfusion needle or fistula needle with protective element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,307,094 B2 - Document ID: US10307094B2 - Status: Granted - Kind: B2 - Application number: 15/202,895 - Filed: 2016-07-06 - Published: 2017-01-19 - Granted: 2019-06-04 - Earliest claimed: 2015-07-15 - Assignees: Pikdare S.R.L. - Applicants: Artsana S.p.A. - Inventors: Elena Mauri; Pierluigi Franco; Daniele Pollaci - Web page: https://patentgrep.com/patent/US10307094B2 ## CPC - A61B 5/150664: {Pivotable protective sleeves, i.e. sleeves connected to, or integrated in, the piercing or driving device, and which are pivoted for covering or uncovering the piercing element} - A61B 5/15003: {for venous or arterial blood} - A61B 5/15019: {Depth adjustment mechanism using movable stops located inside the piercing device housing and limiting the travel of the drive mechanism (mechanisms using distal end caps A61B5/150183, mechanisms at the piercing element carrier proximal end A61B5/150198)} - A61B 5/150641: {comprising means to impede repositioning of protection sleeve from covering to uncovering position} - A61B 5/15074: {Needle sets comprising wings, e.g. butterfly type, for ease of handling} - A61B 5/153: {Devices} specially adapted for taking samples of venous or arterial blood, e.g. with syringes - A61M 5/158: Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} - A61M 5/32: Needles; Details of needles pertaining to their connection with syringe or hub (infusion needles A61M5/158); Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles - A61M 5/321: {Means for protection against accidental injuries by used needles} - A61M 5/3271: {with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position} - A61B 5/150259: {Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape} - A61B 5/150389: {Hollow piercing elements, e.g. canulas, needles, for piercing the skin} - A61B 5/150503: {Single-ended needles (hollow piercing element tip design A61B5/150396)} - A61M 2005/1586: {Holding accessories for holding infusion needles on the body} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A microperfusion needle or fistula needle with a protective element comprises a first component comprising a cannula, a body rigidly joined to the cannula, and having grasping wings extending therefrom, a second component comprising an elongate body having a cavity for slidably receiving the first component between an operating position of the cannula and a safety position of the cannula, the elongate body having lateral slots for the grasping wings to extend therethrough, the grasping wings being suitable for elastically bending around and contacting opposed portions of the elongate body. The elongate body comprises two arrays of projections, which are contacted by the wings when bent. Opposed pairs of projections are designed to contact and mechanically interfere with the grasping wings when bent. ## Claims ### Claim 1 A microperfusion needle or fistula needle with a protective element, comprising: a first component which comprises: a cannula having a tip allowing insertion thereof into a vein of a patient, and a body rigidly joined to said cannula, the body having substantially opposed lateral grasping wings extending therefrom; a second component which comprises: an elongate body having a cavity for slidably receiving the first component between an operating position in which said cannula projects out of said cavity at a distal first end of the elongate body and a safety position in which said cannula is entirely held within said cavity, said elongate body having lateral slots for said grasping wings to extend therethrough, said grasping wings being configured to elastically bend around and contact opposed portions defined on the elongate body, and; two arrays of projections being positioned on said opposed portions of the elongate body, each of said two arrays of projections comprising individual projections, wherein each of the individual projections, of said two arrays of projections, being located proximal to said distal first end of the elongate body such that each and every individual projection abut said grasping wings only when the first component is in the operating position, and wherein the two arrays of projections are configured to contact and mechanically interfere with said grasping wings when the first component is in the operating position with the grasping wings bent, such that when the cannula is pushed proximally towards the elongate body, proximal movement of the grasping wings is hindered relative to the elongate body, such that relative proximal sliding movement between the first component and the second component is prevented, and when the grasping wings are undeformed, the first component is allowed to slide proximally from the operating position to the safety position, wherein said two arrays of projections are unable to contact and unable to mechanically interfere with the grasping wings when the first component is in the safety position. ### Claim 2 (depends on 1) The needle as claimed in claim 1, wherein each projection of said two arrays of projections defines an abutment shoulder for each grasping wing, each abutment shoulder opposing the sliding motion of the first component into the second component from the operating position to the safety position when abutted by a respective bent grasping wing. ### Claim 3 (depends on 1) The needle as claimed in claim 1, wherein each projection of an array of projections, defined from said two arrays of projections, are successively arranged; and wherein a projection farthest from the distal first end of the elongate body is configured to protrude out of said elongate body to greater extents than projections closer to said distal first end of the elongate body. ### Claim 4 (depends on 1) The needle as claimed in claim 1, wherein there are at least two projections in each of said two arrays of projections. ### Claim 5 (depends on 1) The needle as claimed in claim 1, comprising at least one limit stop element placed on said elongate body farther from said distal first end of the elongate body than said projections; said limit stop element protruding out of said elongate body to a greater extent than said projections to intercept said grasping wings when bent. ### Claim 6 (depends on 1) The needle as claimed in claim 1, wherein the projections of each of said two arrays of projections have a step shape. ### Claim 7 (depends on 1) The needle as claimed in claim 1, wherein said elongate body has ribs designed to facilitate retraction of the first component when the cannula is withdrawn from the vein. ### Claim 8 (depends on 1) The needle as claimed in claim 1, comprising retention members for stably retaining said cannula in said safety position.