Hollow glass microspheres are microscopic spheres made of glass with a hollow core. They are typically used in a variety of applications, including oil and gas drilling, aerospace engineering, and biomedical applications.

In biomedical applications, hollow glass microspheres are used as a drug delivery vehicle or a contrast agent for imaging. The hollow interior of the microspheres can be filled with drugs or contrast agents, which can then be released slowly over time as the microspheres degrade in the body.

Hollow glass microspheres are also being investigated for their potential use in tissue engineering and regenerative medicine. They have been shown to support the growth of stem cells and promote tissue regeneration in certain applications.

In addition, hollow glass microspheres have been used in cancer treatment as a way to enhance the effectiveness of radiation therapy. When injected into tumors, the microspheres can help to absorb and scatter radiation, which can increase the dose delivered to the tumor while minimizing damage to healthy tissue.

Hollow glass microspheres have shown promise in a variety of clinical applications, and ongoing research is exploring their potential for use in a range of biomedical and therapeutic applications. However, further studies are needed to fully understand their safety and efficacy in these applications.