Seal device with adjustable aperture

1. A seal device, comprising:

a seal housing defining a central axis, the seal housing including an inner wall and an outer wall, the inner wall defining an opening along the central axis;

a rotatable head mounted to the seal housing;

at least one finger pivotally mounted to the rotatable head; and

a cam operably coupled to the rotatable head and the at least one finger such that direct engagement and rotation of the rotatable head by an operator causes rotation of the cam and the at least one finger to define an aperture dimensioned to receive a surgical instrument of a predetermined size, the at least one finger configured to reduce the amount by which the surgical instrument may be moved off-axis relative to the central axis.

2. The seal device of claim 1 , further comprising an instrument seal for substantially sealing about the surgical instrument.

3. The seal device of claim 1 , further comprising a zero-closure seal for providing a substantial seal in the absence of a surgical instrument.

4. The seal device of claim 1 , wherein the seal device includes three fingers.

5. The seal device of claim 1 , wherein the rotatable head includes indicia which provide and indication to a user of the appropriate size of an instrument that may be inserted therethrough.

6. The seal device of claim 5 , wherein the indicia includes a window defined by the rotatable head through which numerical markings may be visible.

7. A seal device, comprising:

a seal housing;

a cam rotatably disposed within the seal housing;

a head operably coupled to the cam; and

at least one cam finger pivotably disposed within the seal housing and in mechanical communication with the cam, the at least one cam finger defining an aperture having a first diameter through the seal housing;

wherein the cam is operably coupled to the head and the at least one cam finger such that rotation of the head by an operator results in rotation of the cam and the at least one finger, the at least one finger configured to maintain a second diameter through the seal housing, the second diameter being different from the first diameter to receive an instrument of a preselected size.

8. The seal device of claim 7 , wherein the head includes indicia corresponding to a diameter of the aperture.

9. The seal device of claim 7 , wherein the cam is configured for operation proximally of the seal housing.

10. The seal device of claim 7 , wherein at least one seal member is associated with the seal device.