Peripheral Microneedle Patch for First‐Aid Hemostasis. Issue 7 (16th January 2023)

• Record Type: Journal Article
• Authors: Lee, Jungho; Park, Sebin; Le, Phuong Thao; Lee, Geunho; Lee, Hyoun Wook; Yun, Gaeun; Jeon, Juhyeong; Park, Jeongwoo; Pham, Duy Tho; Park, Young Sook; Lim, Hoon; Kim, Chulhong; Hwang, Tae Sik; Kim, Seung Whan; Lim, Geunbae
• Is Part Of: Advanced healthcare materials. Volume 12:Issue 7(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-01-16
• Subjects: hemostasis -- microneedles -- peripheral drug delivery -- wound healing; Biomedical materials -- Periodicals; 610.28
• DOI: 10.1002/adhm.202201697
• Languages: English
• ISSNs: 2192-2640

Abstract

Abstract: Despite the minimized puncture sizes and high efficiency, microneedle (MN) patches have not been used to inject hemostatic drugs into bleeding wounds because they easily destroy capillaries when a tissue is pierced. In this study, a shelf‐stable dissolving MN patch is developed to prevent rebleeding during an emergency treatment. A minimally and site‐selectively invasive hemostatic drug delivery system is established by using a peripheral MN (p‐MN) patch that does not directly intrude the wound site but enables topical drug absorption in the damaged capillaries. The invasiveness of MNs is histologically examined by using a bleeding liver of a Sprague–Dawley (SD) rat as an extreme wound model in vivo. The skin penetration force is quantified to demonstrate that the administration of the p‐MN patch is milder than that of the conventional MN patch. Hemostatic performance is systematically studied by analyzing bleeding weight and time and comparing them with that of conventional hemostasis methods. The superior performance of a p‐MN for the heparin‐pretreated SD rat model is demonstrated by intravenous injection in vivo. Abstract : Contradictory natures of topical and systemic drug delivery become compatible with a peripheral microneedle (MN) patch. The destructive aspect of the MN patch is systematically and histologically investigated. Engineering design expands the usage of MN patches toward bleeding tissues. The site‐selective insertion of MNs accesses the susceptible tissue via adjacent vessels. Efficient hemostasis is achieved by the peripheral MN patch.