Instrument for painless subcutaneous insertion of needles and cannulae, used for e.g. injection, infusion or sampling, comprises a front guard with interfering projections

摘要

An instrument for painless subcutaneous insertion of needles and cannular, comprises a front guard (3) that has interfering projections (4) standing away from its surface in the direction of insertion. An instrument for painless subcutaneous insertion of needles and cannular, comprises a front guard (3) that has interfering projections (4) standing away from its surface in the direction of insertion. They optionally have differing diameters and lengths, and the guard is reinforced at its rear. The guard has an opening through which the needle can pass, and it may be designed to advance with the needle, under spring loading and against a stop. An independent claim is included for the corresponding painless method of insertion.