Biocompatibility assessment of an integrated contraceptive and RFID-based intravaginal device in cats (Felis catus): A preliminary study

Abstract

Background: An intravaginal device (IVD) made from polyethylene plastic and copper wire, integrated with a radio frequency identification (RFID) chip, was developed as a contraceptive and identity device for cats. Aim: This study evaluates the local and systemic biocompatibility of the IVD in five non-pregnant female cats. Methods: The IVD was successfully inserted into the vaginal lumen after estrogen administration. Radiographic imaging confirmed the IVD's position, which lasted up to two days post-insertion. Results: Systemic response, assessed through hematological examinations on days 0, 1, and 3 post-insertion, showed no significant changes in erythrogram and leukogram parameters. Local response, evaluated through vulvar inspection and vaginal cytology on days 0, 1, 3, and 7, revealed no neutrophil infiltration in 4 out of 5 cats, indicating compatibility with vaginal tissue. Furthermore, epithelial cell profile changes were observed, showing an increase in superficial cells, which is typical during the estrus phase. Conclusion: These findings suggest that the IVD is biocompatible and suitable for use as a contraceptive and identity device in cats. However, further long-term studies are necessary to evaluate the device's prolonged efficacy and potential for contraception failure prevention by mating trials. [Open Vet J 2024; 14(9.000): 2348-2360]

Keywords

• intravaginal device
• biocompatibility
• contraception
• rfid identification
• feline population control