Ophthalmic surgical equipment and ophthalmic surgical cassettes

Abstract

To provide an ophthalmic surgical device and an ophthalmic surgical cassette that can appropriately suppress the effects of pulsation caused by a peristaltic pump. [Solution] The peristaltic perfusion path changes the perfusion pressure by pressing the perfusion path with pump rollers. The pressing wall section sandwiches the perfusion path between itself and the pump rollers of the peristaltic perfusion pump. The roller unit of the peristaltic perfusion pump has a plurality of pump rollers arranged along a circular arrangement centered on the axis of rotation, and rotates around the axis of rotation to sequentially bring the plurality of pump rollers into contact with the perfusion path. The pressing wall section is positioned opposite the outer circumferential surface of the roller unit. The pressing wall section is formed in a curved shape from the upstream side to the downstream side of the perfusion path. The distance between a certain downstream region of the pressing wall section, from the downstream end towards the upstream side, and the outer circumferential surface of the roller unit gradually increases as it approaches the downstream side.

Claims

1. An ophthalmic surgical device that supplies irrigation fluid from an irrigation fluid source into the eye of a patient, A perfusion path that passes the perfusion fluid supplied from the perfusion fluid source through the surgical instrument, A peristaltic perfusion pump is provided in the perfusion path and changes the pressure within the perfusion path by pressing a flexible, pressurized portion within the perfusion path with a pump roller. The pressing portion of the perfusion path is sandwiched between the pressing wall portion and the pump roller of the peristaltic perfusion pump, Equipped with, The aforementioned peristaltic perfusion pump is The roller unit comprises a plurality of pump rollers arranged along a circular arrangement centered on a rotation axis, and rotates around the rotation axis to sequentially bring the plurality of pump rollers into contact with the portion to be pressed. The aforementioned pressing wall portion is It is positioned opposite the outer circumferential surface of the roller unit, forming an arc-shaped position between it and the roller unit where the pressed portion is positioned, and has a curved shape that extends from the upstream side, which is the perfusion fluid source side of the perfusion path, to the downstream side, which is the surgical instrument side. An ophthalmic surgical apparatus characterized in that the distance between the downstream region, which is a certain area of ​​the pressing wall portion extending from the downstream end to the upstream side, and the outer surface of the roller unit gradually increases as it approaches the downstream side.

2. An ophthalmic surgical apparatus according to claim 1, An ophthalmic surgical apparatus characterized in that the curvature of the upstream region, which is a certain region located upstream of the downstream region of the pressing wall, is greater than the curvature of the downstream region.

3. An ophthalmic surgical apparatus according to claim 2, An ophthalmic surgical apparatus characterized in that the distance between the upstream region of the pressing wall and the outer circumferential surface of the roller unit is constant.

4. An ophthalmic surgical apparatus according to claim 3, An ophthalmic surgical apparatus characterized in that, regardless of the rotation angle of the roller unit, at least one of the plurality of pump rollers provided on the roller unit presses the portion to be pressed against the upstream region of the pressing wall.

5. An ophthalmic surgical cassette that is detachably attached to an ophthalmic surgical device that supplies irrigation fluid from an irrigation fluid source into the eye of a patient by supplying it to surgical instruments through an irrigation pathway, The aforementioned ophthalmic surgical device is The system includes a peristaltic perfusion pump provided in the perfusion path, which changes the pressure within the perfusion path by pressing a flexible, pressurized portion within the perfusion path with a pump roller. The aforementioned ophthalmic surgery cassette is The device is fitted to a predetermined mounting position in the ophthalmic surgical apparatus and comprises a pressing wall portion that sandwiches the pressed portion of the perfusion pathway between itself and the pump roller of the peristaltic perfusion pump. The aforementioned peristaltic perfusion pump is The roller unit comprises a plurality of pump rollers arranged along a circular arrangement centered on a rotation axis, and rotates around the rotation axis to sequentially bring the plurality of pump rollers into contact with the portion to be pressed. With the ophthalmic surgical cassette in place at the mounting position, The aforementioned pressing wall portion is It is positioned opposite the outer circumferential surface of the roller unit, forming an arc-shaped position between it and the roller unit where the pressed portion is positioned, and has a curved shape that extends from the upstream side, which is the perfusion fluid source side of the perfusion path, to the downstream side, which is the surgical instrument side. An ophthalmic surgical cassette characterized in that the distance between the downstream region, which is a certain area of ​​the pressing wall portion extending from the downstream end to the upstream side, and the outer surface of the roller unit gradually increases as it approaches the downstream side.

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