A system for assessing risk of post-operative ileus for a patient recovering from surgery, comprising: at least one processor; one or more sensors configured to contact the patient; and a display device, wherein the at least one processor is configured to perform a method including the steps of: receiving, by the at least one processor, acoustic signal data from one or more sensors, each of the one or more sensors configured to capture acoustic signals from the abdominal cavity of the patient; analyzing, via the at least one processor, the acoustic signal data to continuously measure an intestinal rate of the patient over a fixed time period, the fixed time period comprising a period from the first post-operative day to the second post-operative day; calculating a change in mean intestinal rate between a first mean intestinal rate for the first post-operative day and a second mean intestinal rate for the second post-operative day; calculating a percentage of intestinal rate measurements below a threshold intestinal rate during the fixed time period; determining, via the at least one processor, a risk assessment score based on both the change in mean intestinal rate and the percentage of intestinal rate measurements below the threshold intestinal rate; and displaying, via the display device communicatively coupled to the at least one processor, a report of potential post-operative ileus risk, the report comprising the risk assessment score. at least one processor; one or more sensors configured to contact the patient; and a display device, wherein the at least one processor is configured to perform a method including the steps of: receiving, by the at least one processor, acoustic signal data from one or more sensors, each of the one or more sensors configured to capture acoustic signals from the abdominal cavity of the patient; analyzing, via the at least one processor, the acoustic signal data to continuously measure an intestinal rate of the patient over a fixed time period, the fixed time period comprising a period from the first post-operative day to the second post-operative day; calculating a change in mean intestinal rate between a first mean intestinal rate for the first post-operative day and a second mean intestinal rate for the second post-operative day; calculating a percentage of intestinal rate measurements below a threshold intestinal rate during the fixed time period; determining, via the at least one processor, a risk assessment score based on both the change in mean intestinal rate and the percentage of intestinal rate measurements below the threshold intestinal rate; and displaying, via the display device communicatively coupled to the at least one processor, a report of potential post-operative ileus risk, the report comprising the risk assessment score. receiving, by the at least one processor, acoustic signal data from one or more sensors, each of the one or more sensors configured to capture acoustic signals from the abdominal cavity of the patient; analyzing, via the at least one processor, the acoustic signal data to continuously measure an intestinal rate of the patient over a fixed time period, the fixed time period comprising a period from the first post-operative day to the second post-operative day; calculating a change in mean intestinal rate between a first mean intestinal rate for the first post-operative day and a second mean intestinal rate for the second post-operative day; calculating a percentage of intestinal rate measurements below a threshold intestinal rate during the fixed time period; determining, via the at least one processor, a risk assessment score based on both the change in mean intestinal rate and the percentage of intestinal rate measurements below the threshold intestinal rate; and displaying, via the display device communicatively coupled to the at least one processor, a report of potential post-operative ileus risk, the report comprising the risk assessment score.