Syringe for injecting a surgical gas
AssigneeFluoron GmbH
InventorVolker Geuder
Life of this patent
Estimating the term…
Abstract
The invention relates to a ready-to-use syringe containing a mixture of air and a heavy gas in a predetermined mixing ratio. The syringe is for use as a gas tamponade system for medical applications. The tamponade is used to fill a natural cavity resulting e.g. from the shrinkage of a vitreous humour due to ageing, or an artificial cavity resulting e.g. from a vitrectomy.
Claims17
A syringe (1) in the form of a ready-to-use system comprising
- a syringe body (2) having
- an inner chamber (3) and
- a tip (4) connected to the inner chamber (3),
- with a plunger (5a), guided in a longitudinally displaceable manner in the inner chamber (3), preferably with a plunger rod (5), and
- with a sealing stopper (7),
- the inner chamber (3) taking the form of a gas container and being filled with a mixture of air and a heavy gas in a predetermined mixing ratio, the plunger rod (5) or plunger (5a), respectively, being positioned in such a way that the mixture of air and heavy gas present in the predetermined mixing ratio is capable of immediate administration,
- a syringe attachment filter (6) being fixed to the tip (4), and
- the sealing stopper (7) being fixed to the syringe attachment filter (6), which seals the inner chamber (3) gas-tight,
- the syringe body (2) not carrying a mark (18) for the maximum plunger stroke and/or one or more mixing ratio marks (15, 16 or 17) for different heavy gases.
A bag (20) with a syringe (1) packed inside, the latter being a syringe in the form of a ready-to-use system, comprising
- a syringe body (2) having
- an inner chamber (3) and
- a tip (4) connected to the inner chamber (3),
- with a plunger (5a), guided in a longitudinally displaceable manner in the inner chamber (3), preferably with a plunger rod (5), and
- with a sealing stopper (7),
- a syringe attachment filter (6) being fixed to the tip (4),
- the sealing stopper (7) being fixed to the syringe attachment filter (6), which seals the inner chamber (3) gas-tight, and
- the inner chamber (3) taking the form of a gas container and being filled with a mixture of air and a heavy gas in a predetermined mixing ratio, the plunger rod (5) or plunger (5a), respectively, being positioned in such a way that the mixture of air and heavy gas present in the predetermined mixing ratio is capable of immediate administration.
A method of filling a syringe (1) with a predetermined amount of a heavy gas in the form of a ready-to-use system with
- a syringe body (2) having
- an inner chamber (3) and
- a tip 4 connected to the inner chamber (3),
- a plunger (5a), guided in a longitudinally displaceable manner in the inner chamber (3), preferably with a plunger rod (5), and
- a sealing stopper (7),
- the inner chamber (3) taking the form of a gas container and being fillable with air and a heavy gas in a predetermined gas mixing ratio,
- a syringe attachment filter (6) being fixed to the tip (4), and
- the sealing stopper (7) being fixed to the syringe attachment filter (6), which seals the inner chamber (3) gas-tight,
- comprising the steps of:
- positioning of the plunger rod (5) or plunger (5)a, respectively, in such a way that the inner chamber (3) can be filled with a predetermined mixing ratio of a mixture of air and a heavy gas, and
- filling of the inner chamber with amounts of air and heavy gas which are proportioned to give the desired mixing ratio so that the mixture of air and heavy gas is capable of immediate administration.
Dependencies are inferred from the claim text.