# US 10,441,752 B2 · Access device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,441,752 B2 - Document ID: US10441752B2 - Status: Granted - Kind: B2 - Application number: 15/703,026 - Filed: 2017-09-13 - Published: 2018-01-04 - Granted: 2019-10-15 - Earliest claimed: 2007-04-18 - Assignees: Access Scientific, Inc. - Applicants: Access Scientific, LLC - Inventors: Steven F. Bierman; Richard A. Pluth; Janelle Anderson; Wei Huang - Web page: https://patentgrep.com/patent/US10441752B2 ## CPC - A61M 25/0606: {"Over-the-needle" catheter assemblies, e.g. I.V. catheters} - A61B 17/3415: {for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters (A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06)} - A61M 25/0612: {Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders} - A61B 2017/347: {Locking means, e.g. for locking instrument in cannula} - A61M 2005/1585: {Needle inserters} - A61M 2025/09125: {Device for locking a guide wire in a fixed position with respect to the catheter or the human body} - 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)} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An access device places a medical article within a body space of a patient. The device has a needle that includes an elongated body and a needle hub. The device further includes a dilator disposed on and slideable along the elongated body of the needle and a medical article. The medical article is disposed on and slideable along the dilator. A track extends in a proximal direction from the dilator. The needle hub slides along at least a portion of the track between a first position and a second position. The device further includes a locking mechanism operably disposed between the track and the needle hub so as to inhibit further axial movement of the needle in the proximal direction when the needle hub is in the second position. ## Claims ### Claim 1 An access device for placing a medical article within a body space, comprising: a needle including a needle body having a longitudinal axis with a distal tip and a needle hub from which the needle body extends; a dilator including a dilator shaft and a dilator hub, the dilator shaft being disposed on and slideable along the needle body with the dilator hub being disposed distal of the needle hub; a track extending from the dilator hub in a proximal direction; a first locking mechanism operably disposed between the track and the needle so as to selectively inhibit movement of the needle relative to the dilator; and a second locking mechanism operating between the needle hub and the dilator hub, wherein the second locking mechanism is unlocked by rotating at least a portion of the needle hub about the longitudinal axis of the needle. ### Claim 2 (depends on 1) The access device of claim 1, wherein the needle comprises at least one tang engaging the track. ### Claim 3 (depends on 1) The access device of claim 1, wherein the track is rotatable around the longitudinal axis of the dilator hub. ### Claim 4 (depends on 1) The access device of claim 1, wherein the first locking mechanism comprises at least one finger element projecting from the track. ### Claim 5 (depends on 1) The access device of claim 1, wherein a width of the track varies along its longitudinal length. ### Claim 6 (depends on 1) The access device of claim 1, wherein the needle is configured to slide along at least a portion of the track between a first position and a second position, the second position being on a proximal side of the first position, the first locking mechanism inhibiting further proximal movement of the needle when the needle is in the second position. ### Claim 7 (depends on 6) The access device of claim 6, wherein a longitudinal length of the dilator is sufficiently long so that the distal tip of the needle body lies within the dilator at least when the needle is in the second position. ### Claim 8 (depends on 6) The access device of claim 6, wherein the first locking mechanism comprises a slot in the track, the slot being arranged perpendicular to the longitudinal axis and being configured to receive an at least one tang of the needle at least when the needle is in the second position. ### Claim 9 (depends on 1) The access device of claim 1 further comprising a guidewire, the needle body and the guidewire being coaxially disposed with the guidewire slideable through at least a portion of the needle body. ### Claim 10 (depends on 9) The access device of claim 9, wherein the guidewire comprises a wire and a hub, the hub being configured to engage with the needle hub. ### Claim 11 (depends on 1) The access device of claim 1, wherein the track is rotatably coupled to the dilator. ### Claim 12 (depends on 1) The access device of claim 1, wherein the needle body includes a bevel on the distal tip and a tab is located on a side of the needle hub that corresponds with the side of the needle body on which the bevel is formed.