Wound irrigation device pressure monitoring and control system
View Patent ↗An apparatus includes a pressure housing configured to be coupled to a vacuum source and a diaphragm sealingly coupled to the pressure housing. The diaphragm is configured to move in response to the vacuum source. A magnet is coupled to the diaphragm. A magnetic switch is disposed opposite the magnet and is configured to be actuated by the magnet when the magnet is a predetermined distance from the magnetic switch. The magnetic switch is configured to selectively actuate the vacuum source.
1. An apparatus, comprising:
a vacuum pump motor;
a housing configured to be coupled to the vacuum pump motor having an adjustable bracket connected thereto;
a diaphragm sealingly coupled to the housing, the diaphragm configured to move when the vacuum pump motor is actuated in a manner to apply a negative pressure to the housing;
a magnet coupled to the diaphragm; and
a magnetic reed switch connected to said bracket at a critical set-point and operatively coupled to the magnet, the magnetic switch configured to be actuated by the magnet when the magnet is a threshold distance from the magnetic switch such that said magnetic switch selectively actuates the vacuum pump motor and whereby said diaphragm increases in concavity as pressure in said housing increases and said magnet moves farther away from said magnetic reed switch and at said critical set-point, said magnetic reed switch switch opens causing the vacuum pump motor to turn off and pressure leaks from said housing.
2. The apparatus of claim 1 , further comprising:
a wound dressing operatively coupled to the vacuum pump motor, the vacuum pump motor configured to apply negative pressure to the wound dressing.
3. The apparatus of claim 2 , wherein the negative pressure in the housing is associated with a negative pressure in a wound dressing.
4. The apparatus of claim 1 , wherein the magnet is a rare-earth magnet.
5. The apparatus of claim 2 , wherein the magnetic switch is configured to actuate the vacuum pump motor when a pressure in the housing reaches a pressure threshold, the pressure threshold corresponding to a predetermined negative pressure in a wound dressing.
6. The apparatus of claim 1 , wherein a concavity of the diaphragm has a substantially linear relationship with the pressure in the housing.
7. The apparatus of claim 1 , which includes vacuum sensors such that said vacuum motor pump can provide a first draw-down mode for generating an initial draw down vacuum pressure and a second maintenance mode for maintaining a desired vacuum and for compensating for leaks and pressure fluctuations.