Table 4.

Comments on servoregulation techniques pertaining to VAVD.

“When positive pressure in the reservoir exceeds 10 mmHg, sucker and vent pumps shut off.”

“Over pressurization of cardiotomy = vent and sucker auto shut off with audible alarm and visual screen alert to rectify situation.”

“Pumps that supply positive pressure to the reservoir will automatically slowed when reservoir pressure reaches 10 mmHg and will automatically be shut down when the reservoir pressure reaches 20 mmHg.”

“If maximum positive pressure is met or exceeded, audible alarm sounds and vent/sump and pump sucker heads shut off until negative pressure restored.”

VAVD, vacuum-assisted venous drainage.