Core Insights - A breakthrough in medical 3D printing has been achieved by a research team from the California Institute of Technology, developing a technology that allows for the in-situ creation of medical implants and customized therapeutic tissues without traditional invasive surgery [1][2] - The new technique, named "Imaging-Guided In-Situ Ultrasound Printing" (DISP), combines focused ultrasound with specially designed "ultrasound ink" to precisely manufacture biomaterials deep within the body, potentially transforming personalized medicine [1][2] Group 1 - The DISP technology utilizes focused ultrasound to trigger a gelation reaction of biological ink, enabling in-situ printing at targeted locations within the body [1] - The "ultrasound ink" consists of biopolymers, imaging contrast agents, and temperature-sensitive liposomes, which can be delivered to deep tissues via injection or catheter [1][2] - An automated ultrasound transducer operates according to a pre-set digital model, generating localized micro-heating to release cross-linking agents, leading to rapid gelation of the ink [1][2] Group 2 - The biological ink used in this technology is highly tunable, allowing for the design of properties such as enhanced conductivity, drug release, tissue adhesion, and even real-time imaging capabilities [2] - Successful experiments demonstrated the printing of drug-loaded functional biomaterials near bladder tumors in mice and in deep muscle tissues of rabbits, showcasing DISP's potential in drug delivery, tissue repair, and bioelectronic device construction [2] - Safety assessments indicated that the technology did not cause significant inflammation or tissue damage, and the gel ink is not naturally cleared by the body within a week, indicating good biocompatibility [2] Group 3 - The biomedical field is a significant application area for 3D printing technology, traditionally involving external printing of patient-matched scaffolds before surgical implantation [2] - The DISP technology addresses the limitations of traditional methods by enabling direct in-body printing of biomaterials, potentially alleviating patient discomfort associated with surgeries [2] - Future advancements, including the integration of artificial intelligence for real-time path planning, may revolutionize the traditional model of constructing and implanting 3D printed biomaterials, further advancing personalized medicine [2]
无需开刀 量身定制 超声3D生物打印实现体内“深层制造”
Ke Ji Ri Bao·2025-05-11 23:33