The final design encompasses a novel condom attachment site intended to be placed on a patient. Fabricated in silicone by casting from a 3D-printed mold, the tip features a collection chamber designed to resist collapse when subjected to vacuum. A temperature sensor, embedded in the collection chamber silicone wall, will detect urination cycles and regulate a solenoid valve to apply vacuum for a clinically relevant period to assist collecting urine output in a canister. The tip collection chamber contains one-way check valves to modulate the vacuum level while preventing urine leakage. A load cell monitors the canister’s volumetric contents and triggers an alert, auditory or visual, to staff when full. Additional information, such as urine output rate and canister volume, is displayed on an LCD. A separate urinalysis mode, activated at any point during use, allows convenient urine sampling by diverting urine flow with a pinch solenoid. Final features include a moisture trap to protect the house vacuum and a 2000ml collection canister.
Final design of the Modified Vacuum Assisted Male External Catheter System.
Final Design material selection for the control box:
- LCD
- Arduino Nano Every
- Audible Alarm
- Light indicators (Red, Yellow, Green)
- Button’s (On/Off, Speaker (On/Off), Tear Urine Volume Scale, Urinalysis Mode, Light (On/Off)
Final electrical control box with respective buttons to collect urine samples, activate alarms, and tear the scale.
ATTACHMENT SITE
The finalized Solidworks attachment site design of the device’s structure incorporates an extrusion point for connecting medical tubing and check valves to guarantee correct vacuum pressure flow direction.
Final Prototype design of catheter attachment site.
CANISTER OVERFLOW PREVENTION SYSTEM
The Canister’s final design utilizes a load cell to detect volume measurements of urine. The LED lights activate green when the canister is within 500 ml, yellow up to 1500ml and 1800 ml activate an audible alarm.
VACUUM CONTROL REGULATION SYSTEM
- Thermistor
- Cross-sectional view of the attachment site cage revealing the embedded thermistor, intended to be exposed to urine contact.
- Vacuum Solenoid
- 2-way flow through the solenoid
- Turn the vacuum on/off based on the urination cycle
- Vacuum Sensor
- Integrated into the control box to measure vacuum exposure at the attachment site.