Design and CFD analysis of self-regulating pressure relief valves

Neurogenic bladder can lead to diseases such as urinary tract infections, bladder stones, and renal dysfunction. However, a rational method of catheterization during recovery can preserve 90% of renal function in patients. In this paper, a self-regulating pressure urinary drainage valve suitable for different populations is designed based on existing urine drainage devices. It can better improve patients' ability to void and control urine. Furthermore, CFD analysis is conducted on factors affecting the performance of the pressure urinary drainage device during use, such as outlet size and quantity, valve body cone size, and outlet pore section. Reasonable design dimensions are obtained, further optimizing the self-regulating pressure urinary drainage device.