Apparatus for collection of oocytes
An oocyte aspirator assembly for use in in vitro fertilization procedures includes a vacuum source for creating a vacuum in the assembly. The assembly also includes valve mechanisms to selectively vary the intensity of the vacuum created in the assembly between at least two levels, one of which is at a first low level at which oocytes can be safely aspirated from ovarian follicles, and a second of which is at a higher level than the first low level. The assembly also includes a control which can be manually or automatically actuated to change the vacuum level in the assembly. The control can take the form of one or more foot pedals or an occlude button mounted on a casing for the assembly. The assembly also may include a third vacuum level which equals the full output of the vacuum motor.
1 . An oocyte aspirator assembly, said assembly comprising:
a) means for creating a vacuum, said means comprising a vacuum pump;
b) a plurality of vacuum selectors operatively connected to said vacuum pump and operative to produce different operating vacuum pressures in a suction port component of said assembly;
c) first means for selectively connecting one or more of said vacuum selectors with said vacuum pump so as to serve to control vacuum pressures created at said suction port; and
d) second means for selectively energizing said first means.
2 . The assembly of claim 1 wherein said operating vacuum pressures include a first low pressure which is in the range of about 20 mm Hg to about 120 mm Hg.
3 . The assembly of claim 2 wherein said operating vacuum pressures also include a second higher pressure which is in the range of about 120 mm Hg to about 150 mm Hg.
4 . The assembly of claim 3 further comprising a first pressure gauge which is operative to display operating pressures which are in the range of about 20 mm Hg to about 150 mm Hg.
5 . The assembly of claim 3 further comprising a second pressure gauge which is operative to display the operating pressure which is extant during free flow of said vacuum pump.
6 . The assembly of claim 3 wherein said second means includes at least one foot pedal which can be manually operated to energize said first means.
7 . The assembly of claim 6 wherein said second means includes a pair of foot pedals one of which is operative to energize said first means so as to create said first low operating vacuum pressure and the other of which is operative to energize said first means so as to create said second higher operating pressure.
8 . The assembly of claim 3 wherein said operating vacuum pressures also include a third high pressure which is about 350 mm Hg.
9 . The assembly of claim 8 further comprising a manually operated system-occlude member on a system control panel, actuation of said member being operative to cause maximum operation of said vacuum pump and to negate operation of said first means whereby full vacuum pump pressure is created at said suction port component.