System and Methods For Sealing a Channel In Tissue

    公开(公告)号:US20210059654A1

    公开(公告)日:2021-03-04

    申请号:US16961224

    申请日:2019-01-10

    摘要: A system for performing a minimally invasive percutaneous procedure comprises a medical device comprising a hydrogel delivery needle (4) with a tip and a hydrogel outlet (6), an injectable, shear-thinning, self-healing viscoelastic hydrogel that exhibits a storage modulus (G) of at least 600 Pa, and a tan δ (G″/G) from 0.1 to 0.6 in dynamic viscoelasticity measured by a rheometer at 1 Hz and 1% strain rate at 25° C. The system may also comprise a coaxial cannula (2) having a lumen configured for receipt of the hydrogel delivery needle (4), wherein the hydrogel delivery needle comprises an adjustable positioning mechanism (8) configured to limit the advancement depth of the hydrogel delivery needle through the coaxial cannula to a predetermined depth distal to a distal-most end of the coaxial cannula.

    System and Methods For Sealing a Channel In Tissue

    公开(公告)号:US20230054776A1

    公开(公告)日:2023-02-23

    申请号:US17809187

    申请日:2022-06-27

    摘要: A system for performing a minimally invasive percutaneous procedure comprises a medical device comprising a hydrogel delivery needle (4) with a tip and a hydrogel outlet (6), an injectable, shear-thinning, self-healing viscoelastic hydrogel that exhibits a storage modulus (G′) of at least 600 Pa, and a tan δ (G"/G′) from 0.1 to 0.6 in dynamic viscoelasticity measured by a rheometer at 1 Hz and 1% strain rate at 25° C. The system may also comprise a coaxial cannula (2) having a lumen configured for receipt of the hydrogel delivery needle (4), wherein the hydrogel delivery needle comprises an adjustable positioning mechanism (8) configured to limit the advancement depth of the hydrogel delivery needle through the coaxial cannula to a predetermined depth distal to a distal-most end of the coaxial cannula.

    System and Method to Enhance Ranging Resolution for Localization of a Lora Sensor or Device

    公开(公告)号:US20200383070A1

    公开(公告)日:2020-12-03

    申请号:US16754275

    申请日:2018-10-08

    IPC分类号: H04W56/00 H04L29/08

    摘要: The invention provides a system and method of identifying when a message is received at a control station from at least one device in a network having a plurality of devices, said method comprising the steps of receiving at the control station a low bandwidth signal from at least one device; obtaining a coarse timestamp estimate of when said low bandwidth signal is received by correlating with a pre-programmed signal template; generating a higher resolution correlation estimate by phase shifting the pre-programmed signal template and repeating the correlation; and detecting where the correlation is above a preselected value; and applying a curve fitting function about the higher resolution correlation estimate to obtain an accurate timestamp when the message was received.