In various embodiments, a surgical cassette, configured to engage peristaltic pump rollers, may include two or more pump segments between a sheet and a substrate coupled to the sheet. The two or more pump segments on the cassette may produce additional flow (e.g., approximately twice the flow for two segments as opposed to one) than if the cassette had only one pump segment engaging the roller. Further, in some embodiments, the two or more pump segments and rollers on the roller head may be configured to provide a flow profile in which a peak of a pulse from a first pump segment is at least partially out of phase with a peak of a pulse from the second pump segment. The combined resultant flow may then have a flow profile with pulsation amplitudes that are smaller than the individual pump segment pulsation amplitudes.在多種具體實例中，經組裝以與蠕動泵軋輥嚙合的外科用卡匣可在一片材與一連結至該片材之基材間包含二或更多個泵區段。比起若該卡匣僅具有一個與軋輥嚙合的泵區段，在該卡匣上的二或更多個泵區段可產生額外的流動(例如，二個區段的流動(如相對於一個)為大約兩倍)。再者，在某些具體實例中，該二或更多個泵區段與在軋輥頭上的軋輥可組裝成提供一流動曲線，其中來自該第一泵區段的脈衝波峰與來自該第二泵區段的脈衝波峰呈至少部分異相。然後，該結合產生的流動可具有一流動曲線，其脈動振幅小於各別泵區段的脈動振幅。
