US 11,896,512 B2
Method of detecting leakage in medical devices
Scott E. Liddle, Raleigh, NC (US); and Lauren M. Lattanzi, Raleigh, NC (US)
Assigned to Hollister Incorporated, Libertyville, IL (US)
Appl. No. 18/259,371
Filed by Hollister Incorporated, Libertyville, IL (US)
PCT Filed Jan. 4, 2022, PCT No. PCT/US2022/011139
§ 371(c)(1), (2) Date Jun. 26, 2023,
PCT Pub. No. WO2022/159264, PCT Pub. Date Jul. 28, 2022.
Claims priority of provisional application 63/139,042, filed on Jan. 19, 2021.
Prior Publication US 2023/0390097 A1, Dec. 7, 2023
Int. Cl. A61F 5/44 (2006.01); A61F 5/443 (2006.01); G01M 3/16 (2006.01); G08B 21/18 (2006.01)
CPC A61F 5/4404 (2013.01) [A61F 5/443 (2013.01); G01M 3/16 (2013.01); G08B 21/182 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of detecting leakage in a medical device, the method comprising the steps of:
providing a plurality of sensors, wherein each the plurality of sensors is configured to measure resistance of the medical device;
measuring resistance of the medical device using each of the plurality of sensors;
entering resistance measurements in a ring buffer, wherein the ring buffer is configured to hold a current resistance measurement and at least one prior resistance measurement for each of the plurality of sensors;
calculating a median resistance value of each of the plurality of sensors using the current resistance measurement and the at least one prior resistance measurement from each of the plurality of sensors;
comparing the median resistance value of each of the plurality of sensors against a predetermined range of acceptable resistance values;
increasing a leak count for a corresponding sensor when the median resistance value of the sensor is outside the predetermined range of acceptable resistance values;
determining a leak state when the leak count increases beyond a predetermined acceptable leak count, wherein the predetermined acceptable leak count is greater than two; and
sending an alert upon a determination of a leak state.