Set of double needles for injecting liquid medicine
US5026350A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1989 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | May 26, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/341
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A set of double needles for injecting liquid medicine into a patient through a single injection point contains an inner curved needle slidably and rotatably supported within a shorter outer needle. The distal end of the inner needle can protrude from the outer needle to extend sideways, in a controlled direction and extent. The direction in which the inner needle point is inserted into the patient is determined by controllably rotating and engaging a base of the inner needle with respect to a base of the outer needle, with structure provided to prevent unintentional relative rotation of the needles. Liquid medicine may thus be infused into the body of a patient at a number of locations at a preselected depth into the body and within a zone laterally extending from the distal end of the outer needle. The inner needle, which may have a lateral hole at its end, is withdrawable within the outer needle and straightens within the latter during the course of such a withdrawal. A flexible adaptor is provided between the needles and a supply of liquid medicine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.