Tissue adhesive hemostatic microneedle arrays for rapid hemorrhage treatment

Reihaneh Haghniaz, Han Jun Kim, Hossein Montazerian, Avijit Baidya, Maryam Tavafoghi, Yi Chen, Yangzhi Zhu, Solmaz Karamikamkar, Amir Sheikhi, Ali Khademhosseini

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


Blood loss by hemorrhaging wounds accounts for over one-third of ∼5 million trauma fatalities worldwide every year. If not controlled in a timely manner, exsanguination can take lives within a few minutes. Developing new biomaterials that are easy to use by non-expert patients and promote rapid blood coagulation is an unmet medical need. Here, biocompatible, and biodegradable microneedle arrays (MNAs) based on gelatin methacryloyl (GelMA) biomaterial hybridized with silicate nanoplatelets (SNs) are developed for hemorrhage control. The SNs render the MNAs hemostatic, while the needle-shaped structure increases the contact area with blood, synergistically accelerating the clotting time from 11.5 min to 1.3 min in vitro. The engineered MNAs reduce bleeding by ∼92% compared with the untreated injury group in a rat liver bleeding model. SN-containing MNAs outperform the hemostatic effect of needle-free patches and a commercial hemostat in vivo via combining micro- and nanoengineered features. Furthermore, the tissue adhesive properties and mechanical interlocking support the suitability of MNAs for wound closure applications. These hemostatic MNAs may enable rapid hemorrhage control, particularly for patients in developing countries or remote areas with limited or no immediate access to hospitals.

Original languageEnglish (US)
Pages (from-to)314-327
Number of pages14
JournalBioactive Materials
StatePublished - May 2023

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Biomedical Engineering


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