The invention provides surgical needles with a porous distal portion from which a liquid injectate will weep or ooze multidirectionally under injection pressure while the porous distal portion of the needle is inserted into a body surface. The porous distal portion of the needle can be fabricated from...http://www.google.ca/patents/US6949087?utm_source=gb-gplus-sharePatent US6949087 - Apparatus with weeping tip and method of use
