Medical spraying device with nozzle, and method for producing a spray cone

Patent metadata

Field	Value
Publication number	US-9744316-B2
Application number	US-201414297665-A
Country	US
Kind code	B2
Filing date	Jun 6, 2014
Priority date	Jun 6, 2013
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A medical spraying device and method, for irrigating a wound, having a liquid reservoir for a medical irrigation liquid or a connection for such a liquid reservoir and an arrangement for applying pressure to the medical irrigation liquid, such that the irrigation liquid is pushable through a nozzle by the pressure acting on the irrigation liquid in order to produce a spray cone. The nozzle has a plurality of openings, which are arranged at an angle to one another in such a way that the irrigation liquid jets exiting from the openings, at a such flow rate and angle, meet in an atomization space and/or a discharge opening of the nozzle; thus, a spray cone is produced from the atomized irrigation liquid.

First claim

The invention claimed is:

1. A medical spraying device for irrigating a wound comprising a liquid reservoir for a medical irrigation liquid or a connection for such a liquid reservoir and an arrangement for applying pressure to the medical irrigation liquid, such that the irrigation liquid is pushable through a nozzle by the pressure acting on the irrigation liquid to produce a spray cone, wherein the nozzle has a plurality of openings, that are arranged at an angle to one another such that irrigation liquid jets exiting from the openings meet in an atomization space or in a discharge opening of the nozzle adjacent to the atomization space and produce the spray cone from the atomized irrigation liquid, wherein the atomization space is formed between a front face of the nozzle and the discharge opening of the nozzle and gradually decreases in diameter in a direction towards the discharge opening of the nozzle, and further wherein the resulting spray cone outwardly increases in diameter starting from the discharge opening of the nozzle.

2. The spraying device according to claim 1 , wherein the nozzle has a central opening for producing a middle main jet and a plurality of outer openings arranged around the central opening, wherein the outer openings, that are opposite one another with respect to the main opening, are inclined at the same angle in the direction of the main jet.

3. The spraying device according to claim 1 , wherein the arrangement for applying pressure to the medical irrigation liquid is a compressed gas reservoir, wherein the compressed gas reservoir is connected via a pressure line to the liquid reservoir, such that the irrigation liquid is pushable by the gas pressure of the compressed gas reservoir acting on the irrigation liquid through the nozzle to produce the spray cone.

4. The spraying device according to claim 3 , wherein at least one pressure relief valve is arranged in a wall of the pressure line, that opens outwardly and closes the pressure line via the gas pressure from the compressed gas reservoir.

5. The spraying device according to claim 3 , wherein the liquid reservoir is delimited by a resilient wall, that deforms resiliently under the action of the gas pressure, such that, with a reduction of the gas pressure, a volume of the liquid reservoir reduces and pushes the irrigation liquid out from the liquid reservoir through the nozzle.

6. The spraying device according to one of claim 3 , wherein the compressed gas reservoir is a liquefied gas cartridge, that is detachably connectable to the pressure line, wherein the compressed gas cartridge is connectable to the pressure line via an opening means for the compressed gas cartridge.

7. The spraying device according to claim 6 , wherein the evaporation space for the evaporation of liquid constituents of a liquefied gas from the liquefied gas cartridge is arranged in the pressure line between the connection for the compressed gas cartridge and the pressure relief valve, wherein the evaporating liquefied gas produces the gas pressure.

8. The spraying device according to claim 6 , wherein a manually actuatable valve is arranged in the pressure line at the connection for the liquefied gas cartridge.

9. The spraying device according to claim 1 , wherein the compressed gas reservoir is connected to a compressor, that is connectable via a flexible line to the spraying device.

10. The spraying device according to claim 3 , wherein a pressure reduction valve is arranged in the pressure line, that limits the gas pressure acting in the liquid reservoir on the irrigation liquid.

11. The spraying device according to claim 10 , wherein at least one safety element is arranged between the pressure reduction valve and the liquid reservoir and limits the gas pressure loading the liquid reservoir.

12. The spraying device according to claim 1 , wherein the liquid reservoir is connected or connectable via a liquid line to the nozzle, wherein a manually actuatable valve element is arranged in the liquid line, is adapted for controlling a volume flow rate of the irrigation liquid, and is operable using a trigger.

13. The spraying device according to claim 3 , wherein the liquid reservoir is a bottle containing a medical irrigation liquid that is connectable via the pressure line or the liquid line to the spraying device, wherein the liquid line and the pressure line are configured to discharge through a same opening in the bottle arranged head-down during operation.

14. The spraying device according to claim 1 , wherein at least two inlet openings are arranged at the liquid inlet of the nozzle, such that the irrigation liquid entering the interior of the nozzle is divided into at least two irrigation liquid streams, that are conveyed in the nozzle to at least two openings such that the at least two irrigation liquid streams meet at an angle of at least 10° in front of a discharge opening of the nozzle.

15. The spraying device according to claim 1 , wherein the nozzle is provided as a tip of a discharge pipe, wherein the discharge pipe is arranged to be displaceable relative to the spraying device telescopically in an axial direction of the discharge pipe or the discharge pipe is mounted to be rotatable axially through an angle of at least 30°.

16. The spraying device according to claim 1 , wherein a gas is contained above the irrigation liquid in the liquid reservoir, wherein a pressure, via the gas, can be administered onto the irrigation liquid via the surface of the irrigation liquid.

17. A method for debriding infected tissue comprising: producing a spray cone, for debriding infected tissue, via the spraying device according to claim 1 .

18. A method for producing at least one spray cone of a medical irrigation liquid using the spraying device according to claim 1 , the method comprising:
pushing irrigation liquid through the plurality of openings in the nozzle, of the spraying device according to claim 1 , such that the irrigation liquid jets are produced shot towards one another at a flow rate and at an angle that the irrigation liquid jets atomise in front of the nozzle and form a spray cone.

19. The method according to claim 18 , wherein a gas pressure is conveyed from a compressed gas reservoir through a pressure line into a liquid reservoir of the medical irrigation liquid, and the irrigation liquid is pushed out from the liquid reservoir through the nozzle by means of the gas pressure, wherein, if a limit pressure in the pressure line is exceeded, at least one pressure relief valve in the pressure line is opened and the compressed gas thus flows into the surrounding environment and the pressure in the pressure line is reduced or limited.

20. The method according to claim 19 , wherein the gas pressure is produced by evaporating a gas from a CO 2 cartridge, wherein the gas is liquefied, at least in part, in an evaporation space before it is conveyed to the pressure relief valve ( 14 , 15 ).

21. The method according to claim 19 , wherein the gas pressure is limited using a pressure reduction valve in the pressure line, and the gas pressure limited by the pressure reduction valve is conveyed through the pressure line to the liquid reservoir of the medical irrigation liquid, wherein the gas pressure between the pressure reduction valve and the liquid reservoir is reduced or limited, if a limit pressure is exceeded.

22. The spraying device according to claim 1 , wherein at least two inlet openings are arranged at the liquid inlet of the n

Assignees

• Heraeus Medical Gmbh

Inventors

• Vogt Sebastian

Classifications

• B05B7/2421

  Gas containers · CPC title

• A61M3/0279

  Cannula; Nozzles; Tips; their connection means · CPC title

• B05B1/265

  the liquid or other fluent material being symmetrically deflected about the axis of the nozzle · CPC title

• A61M3/022

  Volume; Flow rate · CPC title

• A61M2205/8225

  using incorporated gas cartridges for the driving gas · CPC title