Methods and apparatus for creating and maintaining a progressive pneumoperitoneum over a prolonged duration of time are provided. In some aspects, an apparatus may include a first elongate member having a proximal end, a distal end, and a first lumen extending from the distal end to the proximal end. The apparatus may further include a fixation member disposed between the distal end and the proximal end and configured to secure the apparatus relative to the abdominal wall of a patient. The apparatus may further include a pressure sensor in fluid communication with the first lumen configured to facilitate obtaining an intraperitoneal pressure measurement.
