APPARATUS AND METHOD FOR FIELD-INJECTION ELECTROSTATIC SPRAY COATING OF MEDICAL DEVICES

摘要

An apparatus and method for field-injection electrostatic spray deposition of medical devices like stents. The apparatus includes a medical device holder (2) , which applies a first electrical potential to the medical device (1) , and an electrically insulative electrostatic spray dispensing device (3) having an electrically conductive electrode (8) , which applies a second electrical potential, creating an electrical potential difference sufficient to attract charged coating material particles emitted from an orifice (5) of the dispensing device toward the medical device (1) . The electrode (8) may be sharpened to create a localized, high-strength electric field to improve the charge injection into the coating material or coating solution.