Subramanian Vaidyanathan, Soni Bakulesh Madhusudan
Regional Spinal Injuries Centre, Southport and Formby District General Hospital, Town Lane, Southport, Merseyside, PR8 6PN, UK.
Med Devices (Auckl). 2023 Mar 13;16:47-53. doi: 10.2147/MDER.S400535. eCollection 2023.
We used a safety-valve (Trans-Urethral Catheterisation Safety Valve, Class Medical, Limerick, Ireland) to prevent urethral trauma due to inflation of the anchoring balloon in the urethra during catheterisation of male spinal cord injury patients in a spinal unit. The safety-valve is attached to the balloon channel of a Foley catheter. If the balloon is inflated when it is in the urethra, the pressure valve is activated. Any fluid pushed into the balloon channel leaks out and balloon inflation stops, indicating that the balloon is not inside the bladder. The safety-valve was used in 44 catheterisations. There was leakage of water during three catheterisations. In the first case, the health professional did not inflate and deflate the balloon prior to its use. This "pre-valve inflation" step overcomes the baseline resistance pressure of the balloon and prevents fluid leaking from the valve when the catheter is in the correct position. In the second instance, the valve was found to be defective. In the third case, the catheter had been misplaced; it was removed and repositioned; there was no leakage of water during inflation of the balloon. In one out of 44 catheterisations, the catheter had been misplaced; leakage of water from the safety-valve stopped inflation of the balloon and prevented iatrogenic urethral trauma. The safety-valve may be used during catheterisation of male patients in the spinal unit to prevent urethral trauma caused by inflation of the balloon of Foley catheter in the urethra. However, health professionals should remember the few shortcomings of the catheter safety-valve.
我们使用了一种安全阀（经尿道导尿安全阀，Class Medical公司，爱尔兰利默里克），以防止在脊髓损伤男性患者于脊髓病治疗单元进行导尿时，尿道内固定球囊充气导致的尿道创伤。该安全阀连接到弗利导尿管的球囊通道。如果球囊在尿道内充气时，压力阀会被激活。任何推入球囊通道的液体都会泄漏出来，球囊充气停止，这表明球囊不在膀胱内。该安全阀在44次导尿操作中被使用。有3次导尿过程中出现了漏水情况。在第一个案例中，医护人员在使用前未对球囊进行充放气操作。这个“阀前充气”步骤克服了球囊的基线阻力压力，并防止导尿管处于正确位置时液体从阀中泄漏。在第二个案例中，发现阀门有缺陷。在第三个案例中，导尿管位置放置不当；将其取出并重新放置；球囊充气时没有漏水情况。在44次导尿操作中有1次，导尿管位置放置不当；安全阀漏水使球囊充气停止，从而避免了医源性尿道创伤。在脊髓病治疗单元对男性患者进行导尿时可使用该安全阀，以防止弗利导尿管球囊在尿道内充气导致的尿道创伤。然而，医护人员应牢记该导尿安全阀存在的一些缺点。
