A microsurgical injection instrument particularly useful by a physician for injecting a liquid substance or a suspension into a blood vessel in the retina of a subject's eye, includes a handpiece carrying a hollow needle at its distal end, for penetrating the blood vessel. The longitudinal axis of the...http://www.google.co.uk/patents/US20030171722?utm_source=gb-gplus-sharePatent US20030171722 - Microsurgical injection and/or distending instruments and surgical method and apparatus utilizing same
